-
-#if USE_UNLOCKED_IO
-# include "unlocked-io.h"
-#endif
-
-#ifdef INSIDE_RECURSION
-/* Common operations on the compiled pattern. */
-
-/* Store NUMBER in two contiguous bytes starting at DESTINATION. */
-/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */
-
-# ifdef WCHAR
-# define STORE_NUMBER(destination, number) \
- do { \
- *(destination) = (UCHAR_T)(number); \
- } while (0)
-# else /* BYTE */
-# define STORE_NUMBER(destination, number) \
- do { \
- (destination)[0] = (number) & 0377; \
- (destination)[1] = (number) >> 8; \
- } while (0)
-# endif /* WCHAR */
-
-/* Same as STORE_NUMBER, except increment DESTINATION to
- the byte after where the number is stored. Therefore, DESTINATION
- must be an lvalue. */
-/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */
-
-# define STORE_NUMBER_AND_INCR(destination, number) \
- do { \
- STORE_NUMBER (destination, number); \
- (destination) += OFFSET_ADDRESS_SIZE; \
- } while (0)
-
-/* Put into DESTINATION a number stored in two contiguous bytes starting
- at SOURCE. */
-/* ifdef MBS_SUPPORT, we store NUMBER in 1 element. */
-
-# ifdef WCHAR
-# define EXTRACT_NUMBER(destination, source) \
- do { \
- (destination) = *(source); \
- } while (0)
-# else /* BYTE */
-# define EXTRACT_NUMBER(destination, source) \
- do { \
- (destination) = *(source) & 0377; \
- (destination) += (signed char) (*((source) + 1)) << 8; \
- } while (0)
-# endif
-
-# ifdef DEBUG
-static void
-PREFIX(extract_number) (int *dest, UCHAR_T *source)
-{
-# ifdef WCHAR
- *dest = *source;
-# else /* BYTE */
- signed char temp = source[1];
- *dest = *source & 0377;
- *dest += temp << 8;
-# endif
-}
-
-# ifndef EXTRACT_MACROS /* To debug the macros. */
-# undef EXTRACT_NUMBER
-# define EXTRACT_NUMBER(dest, src) PREFIX(extract_number) (&dest, src)
-# endif /* not EXTRACT_MACROS */
-
-# endif /* DEBUG */
-
-/* Same as EXTRACT_NUMBER, except increment SOURCE to after the number.
- SOURCE must be an lvalue. */
-
-# define EXTRACT_NUMBER_AND_INCR(destination, source) \
- do { \
- EXTRACT_NUMBER (destination, source); \
- (source) += OFFSET_ADDRESS_SIZE; \
- } while (0)
-
-# ifdef DEBUG
-static void
-PREFIX(extract_number_and_incr) (int *destination, UCHAR_T **source)
-{
- PREFIX(extract_number) (destination, *source);
- *source += OFFSET_ADDRESS_SIZE;
-}
-
-# ifndef EXTRACT_MACROS
-# undef EXTRACT_NUMBER_AND_INCR
-# define EXTRACT_NUMBER_AND_INCR(dest, src) \
- PREFIX(extract_number_and_incr) (&dest, &src)
-# endif /* not EXTRACT_MACROS */
-
-# endif /* DEBUG */
-
-\f
-
-/* If DEBUG is defined, Regex prints many voluminous messages about what
- it is doing (if the variable `debug' is nonzero). If linked with the
- main program in `iregex.c', you can enter patterns and strings
- interactively. And if linked with the main program in `main.c' and
- the other test files, you can run the already-written tests. */
-
-# ifdef DEBUG
-
-# ifndef DEFINED_ONCE
-
-/* We use standard I/O for debugging. */
-# include <stdio.h>
-
-/* It is useful to test things that ``must'' be true when debugging. */
-# include <assert.h>
-
-static int debug;
-
-# define DEBUG_STATEMENT(e) e
-# define DEBUG_PRINT1(x) if (debug) printf (x)
-# define DEBUG_PRINT2(x1, x2) if (debug) printf (x1, x2)
-# define DEBUG_PRINT3(x1, x2, x3) if (debug) printf (x1, x2, x3)
-# define DEBUG_PRINT4(x1, x2, x3, x4) if (debug) printf (x1, x2, x3, x4)
-# endif /* not DEFINED_ONCE */
-
-# define DEBUG_PRINT_COMPILED_PATTERN(p, s, e) \
- if (debug) PREFIX(print_partial_compiled_pattern) (s, e)
-# define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2) \
- if (debug) PREFIX(print_double_string) (w, s1, sz1, s2, sz2)
-
-
-/* Print the fastmap in human-readable form. */
-
-# ifndef DEFINED_ONCE
-void
-print_fastmap (char *fastmap)
-{
- unsigned was_a_range = 0;
- unsigned i = 0;
-
- while (i < (1 << BYTEWIDTH))
- {
- if (fastmap[i++])
- {
- was_a_range = 0;
- putchar (i - 1);
- while (i < (1 << BYTEWIDTH) && fastmap[i])
- {
- was_a_range = 1;
- i++;
- }
- if (was_a_range)
- {
- printf ("-");
- putchar (i - 1);
- }
- }
- }
- putchar ('\n');
-}
-# endif /* not DEFINED_ONCE */
-
-
-/* Print a compiled pattern string in human-readable form, starting at
- the START pointer into it and ending just before the pointer END. */
-
-void
-PREFIX(print_partial_compiled_pattern) (UCHAR_T *start, UCHAR_T *end)
-{
- int mcnt, mcnt2;
- UCHAR_T *p1;
- UCHAR_T *p = start;
- UCHAR_T *pend = end;
-
- if (start == NULL)
- {
- printf ("(null)\n");
- return;
- }
-
- /* Loop over pattern commands. */
- while (p < pend)
- {
-# ifdef _LIBC
- printf ("%td:\t", p - start);
-# else
- printf ("%ld:\t", (long int) (p - start));
-# endif
-
- switch ((re_opcode_t) *p++)
- {
- case no_op:
- printf ("/no_op");
- break;
-
- case exactn:
- mcnt = *p++;
- printf ("/exactn/%d", mcnt);
- do
- {
- putchar ('/');
- PUT_CHAR (*p++);
- }
- while (--mcnt);
- break;
-
-# ifdef MBS_SUPPORT
- case exactn_bin:
- mcnt = *p++;
- printf ("/exactn_bin/%d", mcnt);
- do
- {
- printf("/%lx", (long int) *p++);
- }
- while (--mcnt);
- break;
-# endif /* MBS_SUPPORT */
-
- case start_memory:
- mcnt = *p++;
- printf ("/start_memory/%d/%ld", mcnt, (long int) *p++);
- break;
-
- case stop_memory:
- mcnt = *p++;
- printf ("/stop_memory/%d/%ld", mcnt, (long int) *p++);
- break;
-
- case duplicate:
- printf ("/duplicate/%ld", (long int) *p++);
- break;
-
- case anychar:
- printf ("/anychar");
- break;
-
- case charset:
- case charset_not:
- {
-# ifdef WCHAR
- int i, length;
- wchar_t *workp = p;
- printf ("/charset [%s",
- (re_opcode_t) *(workp - 1) == charset_not ? "^" : "");
- p += 5;
- length = *workp++; /* the length of char_classes */
- for (i=0 ; i<length ; i++)
- printf("[:%lx:]", (long int) *p++);
- length = *workp++; /* the length of collating_symbol */
- for (i=0 ; i<length ;)
- {
- printf("[.");
- while(*p != 0)
- PUT_CHAR((i++,*p++));
- i++,p++;
- printf(".]");
- }
- length = *workp++; /* the length of equivalence_class */
- for (i=0 ; i<length ;)
- {
- printf("[=");
- while(*p != 0)
- PUT_CHAR((i++,*p++));
- i++,p++;
- printf("=]");
- }
- length = *workp++; /* the length of char_range */
- for (i=0 ; i<length ; i++)
- {
- wchar_t range_start = *p++;
- wchar_t range_end = *p++;
- printf("%C-%C", range_start, range_end);
- }
- length = *workp++; /* the length of char */
- for (i=0 ; i<length ; i++)
- printf("%C", *p++);
- putchar (']');
-# else
- register int c, last = -100;
- register int in_range = 0;
-
- printf ("/charset [%s",
- (re_opcode_t) *(p - 1) == charset_not ? "^" : "");
-
- assert (p + *p < pend);
-
- for (c = 0; c < 256; c++)
- if (c / 8 < *p
- && (p[1 + (c/8)] & (1 << (c % 8))))
- {
- /* Are we starting a range? */
- if (last + 1 == c && ! in_range)
- {
- putchar ('-');
- in_range = 1;
- }
- /* Have we broken a range? */
- else if (last + 1 != c && in_range)
- {
- putchar (last);
- in_range = 0;
- }
-
- if (! in_range)
- putchar (c);
-
- last = c;
- }
-
- if (in_range)
- putchar (last);
-
- putchar (']');
-
- p += 1 + *p;
-# endif /* WCHAR */
- }
- break;
-
- case begline:
- printf ("/begline");
- break;
-
- case endline:
- printf ("/endline");
- break;
-
- case on_failure_jump:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/on_failure_jump to %td", p + mcnt - start);
-# else
- printf ("/on_failure_jump to %ld", (long int) (p + mcnt - start));
-# endif
- break;
-
- case on_failure_keep_string_jump:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/on_failure_keep_string_jump to %td", p + mcnt - start);
-# else
- printf ("/on_failure_keep_string_jump to %ld",
- (long int) (p + mcnt - start));
-# endif
- break;
-
- case dummy_failure_jump:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/dummy_failure_jump to %td", p + mcnt - start);
-# else
- printf ("/dummy_failure_jump to %ld", (long int) (p + mcnt - start));
-# endif
- break;
-
- case push_dummy_failure:
- printf ("/push_dummy_failure");
- break;
-
- case maybe_pop_jump:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/maybe_pop_jump to %td", p + mcnt - start);
-# else
- printf ("/maybe_pop_jump to %ld", (long int) (p + mcnt - start));
-# endif
- break;
-
- case pop_failure_jump:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/pop_failure_jump to %td", p + mcnt - start);
-# else
- printf ("/pop_failure_jump to %ld", (long int) (p + mcnt - start));
-# endif
- break;
-
- case jump_past_alt:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/jump_past_alt to %td", p + mcnt - start);
-# else
- printf ("/jump_past_alt to %ld", (long int) (p + mcnt - start));
-# endif
- break;
-
- case jump:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
-# ifdef _LIBC
- printf ("/jump to %td", p + mcnt - start);
-# else
- printf ("/jump to %ld", (long int) (p + mcnt - start));
-# endif
- break;
-
- case succeed_n:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
- p1 = p + mcnt;
- PREFIX(extract_number_and_incr) (&mcnt2, &p);
-# ifdef _LIBC
- printf ("/succeed_n to %td, %d times", p1 - start, mcnt2);
-# else
- printf ("/succeed_n to %ld, %d times",
- (long int) (p1 - start), mcnt2);
-# endif
- break;
-
- case jump_n:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
- p1 = p + mcnt;
- PREFIX(extract_number_and_incr) (&mcnt2, &p);
- printf ("/jump_n to %d, %d times", p1 - start, mcnt2);
- break;
-
- case set_number_at:
- PREFIX(extract_number_and_incr) (&mcnt, &p);
- p1 = p + mcnt;
- PREFIX(extract_number_and_incr) (&mcnt2, &p);
-# ifdef _LIBC
- printf ("/set_number_at location %td to %d", p1 - start, mcnt2);
-# else
- printf ("/set_number_at location %ld to %d",
- (long int) (p1 - start), mcnt2);
-# endif
- break;
-
- case wordbound:
- printf ("/wordbound");
- break;
-
- case notwordbound:
- printf ("/notwordbound");
- break;
-
- case wordbeg:
- printf ("/wordbeg");
- break;
-
- case wordend:
- printf ("/wordend");
- break;
-
-# ifdef emacs
- case before_dot:
- printf ("/before_dot");
- break;
-
- case at_dot:
- printf ("/at_dot");
- break;
-
- case after_dot:
- printf ("/after_dot");
- break;
-
- case syntaxspec:
- printf ("/syntaxspec");
- mcnt = *p++;
- printf ("/%d", mcnt);
- break;
-
- case notsyntaxspec:
- printf ("/notsyntaxspec");
- mcnt = *p++;
- printf ("/%d", mcnt);
- break;
-# endif /* emacs */
-
- case wordchar:
- printf ("/wordchar");
- break;
-
- case notwordchar:
- printf ("/notwordchar");
- break;
-
- case begbuf:
- printf ("/begbuf");
- break;
-
- case endbuf:
- printf ("/endbuf");
- break;
-
- default:
- printf ("?%ld", (long int) *(p-1));
- }
-
- putchar ('\n');
- }
-
-# ifdef _LIBC
- printf ("%td:\tend of pattern.\n", p - start);
-# else
- printf ("%ld:\tend of pattern.\n", (long int) (p - start));
-# endif
-}
-
-
-void
-PREFIX(print_compiled_pattern) (struct re_pattern_buffer *bufp)
-{
- UCHAR_T *buffer = (UCHAR_T*) bufp->buffer;
-
- PREFIX(print_partial_compiled_pattern) (buffer, buffer
- + bufp->used / sizeof(UCHAR_T));
- printf ("%ld bytes used/%ld bytes allocated.\n",
- bufp->used, bufp->allocated);
-
- if (bufp->fastmap_accurate && bufp->fastmap)
- {
- printf ("fastmap: ");
- print_fastmap (bufp->fastmap);
- }
-
-# ifdef _LIBC
- printf ("re_nsub: %Zd\t", bufp->re_nsub);
-# else
- printf ("re_nsub: %ld\t", (long int) bufp->re_nsub);
-# endif
- printf ("regs_alloc: %d\t", bufp->regs_allocated);
- printf ("can_be_null: %d\t", bufp->can_be_null);
- printf ("newline_anchor: %d\n", bufp->newline_anchor);
- printf ("no_sub: %d\t", bufp->no_sub);
- printf ("not_bol: %d\t", bufp->not_bol);
- printf ("not_eol: %d\t", bufp->not_eol);
- printf ("syntax: %lx\n", bufp->syntax);
- /* Perhaps we should print the translate table? */
-}
-
-
-void
-PREFIX(print_double_string) (const CHAR_T *where,
- const CHAR_T *string1,
- const CHAR_T *string2,
- int size1,
- int size2)
-{
- int this_char;
-
- if (where == NULL)
- printf ("(null)");
- else
- {
- int cnt;
-
- if (FIRST_STRING_P (where))
- {
- for (this_char = where - string1; this_char < size1; this_char++)
- PUT_CHAR (string1[this_char]);
-
- where = string2;
- }
-
- cnt = 0;
- for (this_char = where - string2; this_char < size2; this_char++)
- {
- PUT_CHAR (string2[this_char]);
- if (++cnt > 100)
- {
- fputs ("...", stdout);
- break;
- }
- }
- }
-}
-
-# ifndef DEFINED_ONCE
-void
-printchar (c)
- int c;
-{
- putc (c, stderr);
-}
-# endif
-
-# else /* not DEBUG */
-
-# ifndef DEFINED_ONCE
-# undef assert
-# define assert(e)
-
-# define DEBUG_STATEMENT(e)
-# define DEBUG_PRINT1(x)
-# define DEBUG_PRINT2(x1, x2)
-# define DEBUG_PRINT3(x1, x2, x3)
-# define DEBUG_PRINT4(x1, x2, x3, x4)
-# endif /* not DEFINED_ONCE */
-# define DEBUG_PRINT_COMPILED_PATTERN(p, s, e)
-# define DEBUG_PRINT_DOUBLE_STRING(w, s1, sz1, s2, sz2)
-
-# endif /* not DEBUG */
-
-\f
-
-# ifdef WCHAR
-/* This convert a multibyte string to a wide character string.
- And write their correspondances to offset_buffer(see below)
- and write whether each wchar_t is binary data to is_binary.
- This assume invalid multibyte sequences as binary data.
- We assume offset_buffer and is_binary is already allocated
- enough space. */
-
-static size_t
-convert_mbs_to_wcs (CHAR_T *dest,
- const unsigned char* src,
-
- /* The length of multibyte string. */
- size_t len,
-
- /* Correspondences between src(char string) and
- dest(wchar_t string) for optimization. E.g.:
- src = "xxxyzz"
- dest = {'X', 'Y', 'Z'}
- (each "xxx", "y" and "zz" represent one
- multibyte character corresponding to 'X',
- 'Y' and 'Z'.)
- offset_buffer = {0, 0+3("xxx"), 0+3+1("y"),
- 0+3+1+2("zz")}
- = {0, 3, 4, 6} */
- int *offset_buffer,
-
- char *is_binary)
-{
- wchar_t *pdest = dest;
- const unsigned char *psrc = src;
- size_t wc_count = 0;
-
- mbstate_t mbs;
- int i, consumed;
- size_t mb_remain = len;
- size_t mb_count = 0;
-
- /* Initialize the conversion state. */
- memset (&mbs, 0, sizeof (mbstate_t));
-
- offset_buffer[0] = 0;
- for( ; mb_remain > 0 ; ++wc_count, ++pdest, mb_remain -= consumed,
- psrc += consumed)
- {
- consumed = mbrtowc (pdest, psrc, mb_remain, &mbs);
-
- if (consumed <= 0)
- /* failed to convert. maybe src contains binary data.
- So we consume 1 byte manualy. */
- {
- *pdest = *psrc;
- consumed = 1;
- is_binary[wc_count] = TRUE;
- }
- else
- is_binary[wc_count] = FALSE;
- /* In sjis encoding, we use yen sign as escape character in
- place of reverse solidus. So we convert 0x5c(yen sign in
- sjis) to not 0xa5(yen sign in UCS2) but 0x5c(reverse
- solidus in UCS2). */
- if (consumed == 1 && (int) *psrc == 0x5c && (int) *pdest == 0xa5)
- *pdest = (wchar_t) *psrc;
-
- offset_buffer[wc_count + 1] = mb_count += consumed;
- }
-
- /* Fill remain of the buffer with sentinel. */
- for (i = wc_count + 1 ; i <= len ; i++)
- offset_buffer[i] = mb_count + 1;
-
- return wc_count;
-}
-
-# endif /* WCHAR */
-
-#else /* not INSIDE_RECURSION */
-
-/* Set by `re_set_syntax' to the current regexp syntax to recognize. Can
- also be assigned to arbitrarily: each pattern buffer stores its own
- syntax, so it can be changed between regex compilations. */
-/* This has no initializer because initialized variables in Emacs
- become read-only after dumping. */
-reg_syntax_t re_syntax_options;
-
-
-/* Specify the precise syntax of regexps for compilation. This provides
- for compatibility for various utilities which historically have
- different, incompatible syntaxes.
-
- The argument SYNTAX is a bit mask comprised of the various bits
- defined in regex.h. We return the old syntax. */
-
-reg_syntax_t
-re_set_syntax (reg_syntax_t syntax)
-{
- reg_syntax_t ret = re_syntax_options;
-
- re_syntax_options = syntax;
-# ifdef DEBUG
- if (syntax & RE_DEBUG)
- debug = 1;
- else if (debug) /* was on but now is not */
- debug = 0;
-# endif /* DEBUG */
- return ret;
-}
-# ifdef _LIBC
-weak_alias (__re_set_syntax, re_set_syntax)
-# endif
-\f
-/* This table gives an error message for each of the error codes listed
- in regex.h. Obviously the order here has to be same as there.
- POSIX doesn't require that we do anything for REG_NOERROR,
- but why not be nice? */
-
-static const char re_error_msgid[] =
- {
-# define REG_NOERROR_IDX 0
- gettext_noop ("Success") /* REG_NOERROR */
- "\0"
-# define REG_NOMATCH_IDX (REG_NOERROR_IDX + sizeof "Success")
- gettext_noop ("No match") /* REG_NOMATCH */
- "\0"
-# define REG_BADPAT_IDX (REG_NOMATCH_IDX + sizeof "No match")
- gettext_noop ("Invalid regular expression") /* REG_BADPAT */
- "\0"
-# define REG_ECOLLATE_IDX (REG_BADPAT_IDX + sizeof "Invalid regular expression")
- gettext_noop ("Invalid collation character") /* REG_ECOLLATE */
- "\0"
-# define REG_ECTYPE_IDX (REG_ECOLLATE_IDX + sizeof "Invalid collation character")
- gettext_noop ("Invalid character class name") /* REG_ECTYPE */
- "\0"
-# define REG_EESCAPE_IDX (REG_ECTYPE_IDX + sizeof "Invalid character class name")
- gettext_noop ("Trailing backslash") /* REG_EESCAPE */
- "\0"
-# define REG_ESUBREG_IDX (REG_EESCAPE_IDX + sizeof "Trailing backslash")
- gettext_noop ("Invalid back reference") /* REG_ESUBREG */
- "\0"
-# define REG_EBRACK_IDX (REG_ESUBREG_IDX + sizeof "Invalid back reference")
- gettext_noop ("Unmatched [ or [^") /* REG_EBRACK */
- "\0"
-# define REG_EPAREN_IDX (REG_EBRACK_IDX + sizeof "Unmatched [ or [^")
- gettext_noop ("Unmatched ( or \\(") /* REG_EPAREN */
- "\0"
-# define REG_EBRACE_IDX (REG_EPAREN_IDX + sizeof "Unmatched ( or \\(")
- gettext_noop ("Unmatched \\{") /* REG_EBRACE */
- "\0"
-# define REG_BADBR_IDX (REG_EBRACE_IDX + sizeof "Unmatched \\{")
- gettext_noop ("Invalid content of \\{\\}") /* REG_BADBR */
- "\0"
-# define REG_ERANGE_IDX (REG_BADBR_IDX + sizeof "Invalid content of \\{\\}")
- gettext_noop ("Invalid range end") /* REG_ERANGE */
- "\0"
-# define REG_ESPACE_IDX (REG_ERANGE_IDX + sizeof "Invalid range end")
- gettext_noop ("Memory exhausted") /* REG_ESPACE */
- "\0"
-# define REG_BADRPT_IDX (REG_ESPACE_IDX + sizeof "Memory exhausted")
- gettext_noop ("Invalid preceding regular expression") /* REG_BADRPT */
- "\0"
-# define REG_EEND_IDX (REG_BADRPT_IDX + sizeof "Invalid preceding regular expression")
- gettext_noop ("Premature end of regular expression") /* REG_EEND */
- "\0"
-# define REG_ESIZE_IDX (REG_EEND_IDX + sizeof "Premature end of regular expression")
- gettext_noop ("Regular expression too big") /* REG_ESIZE */
- "\0"
-# define REG_ERPAREN_IDX (REG_ESIZE_IDX + sizeof "Regular expression too big")
- gettext_noop ("Unmatched ) or \\)") /* REG_ERPAREN */
- };
-
-static const size_t re_error_msgid_idx[] =
- {
- REG_NOERROR_IDX,
- REG_NOMATCH_IDX,
- REG_BADPAT_IDX,
- REG_ECOLLATE_IDX,
- REG_ECTYPE_IDX,
- REG_EESCAPE_IDX,
- REG_ESUBREG_IDX,
- REG_EBRACK_IDX,
- REG_EPAREN_IDX,
- REG_EBRACE_IDX,
- REG_BADBR_IDX,
- REG_ERANGE_IDX,
- REG_ESPACE_IDX,
- REG_BADRPT_IDX,
- REG_EEND_IDX,
- REG_ESIZE_IDX,
- REG_ERPAREN_IDX
- };
-\f
-#endif /* INSIDE_RECURSION */
-
-#ifndef DEFINED_ONCE
-/* Avoiding alloca during matching, to placate r_alloc. */
-
-/* Define MATCH_MAY_ALLOCATE unless we need to make sure that the
- searching and matching functions should not call alloca. On some
- systems, alloca is implemented in terms of malloc, and if we're
- using the relocating allocator routines, then malloc could cause a
- relocation, which might (if the strings being searched are in the
- ralloc heap) shift the data out from underneath the regexp
- routines.
-
- Here's another reason to avoid allocation: Emacs
- processes input from X in a signal handler; processing X input may
- call malloc; if input arrives while a matching routine is calling
- malloc, then we're scrod. But Emacs can't just block input while
- calling matching routines; then we don't notice interrupts when
- they come in. So, Emacs blocks input around all regexp calls
- except the matching calls, which it leaves unprotected, in the
- faith that they will not malloc. */
-
-/* Normally, this is fine. */
-# define MATCH_MAY_ALLOCATE
-
-/* When using GNU C, we are not REALLY using the C alloca, no matter
- what config.h may say. So don't take precautions for it. */
-# ifdef __GNUC__
-# undef C_ALLOCA
-# endif
-
-/* The match routines may not allocate if (1) they would do it with malloc
- and (2) it's not safe for them to use malloc.
- Note that if REL_ALLOC is defined, matching would not use malloc for the
- failure stack, but we would still use it for the register vectors;
- so REL_ALLOC should not affect this. */
-# if (defined C_ALLOCA || defined REGEX_MALLOC) && defined emacs
-# undef MATCH_MAY_ALLOCATE
-# endif
-#endif /* not DEFINED_ONCE */
-\f
-#ifdef INSIDE_RECURSION
-/* Failure stack declarations and macros; both re_compile_fastmap and
- re_match_2 use a failure stack. These have to be macros because of
- REGEX_ALLOCATE_STACK. */
-
-
-/* Number of failure points for which to initially allocate space
- when matching. If this number is exceeded, we allocate more
- space, so it is not a hard limit. */
-# ifndef INIT_FAILURE_ALLOC
-# define INIT_FAILURE_ALLOC 5
-# endif
-
-/* Roughly the maximum number of failure points on the stack. Would be
- exactly that if always used MAX_FAILURE_ITEMS items each time we failed.
- This is a variable only so users of regex can assign to it; we never
- change it ourselves. */
-
-# ifdef INT_IS_16BIT
-
-# ifndef DEFINED_ONCE
-# if defined MATCH_MAY_ALLOCATE
-/* 4400 was enough to cause a crash on Alpha OSF/1,
- whose default stack limit is 2mb. */
-long int re_max_failures = 4000;
-# else
-long int re_max_failures = 2000;
-# endif
-# endif
-
-union PREFIX(fail_stack_elt)
-{
- UCHAR_T *pointer;
- long int integer;
-};
-
-typedef union PREFIX(fail_stack_elt) PREFIX(fail_stack_elt_t);
-
-typedef struct
-{
- PREFIX(fail_stack_elt_t) *stack;
- unsigned long int size;
- unsigned long int avail; /* Offset of next open position. */
-} PREFIX(fail_stack_type);
-
-# else /* not INT_IS_16BIT */
-
-# ifndef DEFINED_ONCE
-# if defined MATCH_MAY_ALLOCATE
-/* 4400 was enough to cause a crash on Alpha OSF/1,
- whose default stack limit is 2mb. */
-int re_max_failures = 4000;
-# else
-int re_max_failures = 2000;
-# endif
-# endif
-
-union PREFIX(fail_stack_elt)
-{
- UCHAR_T *pointer;
- int integer;
-};
-
-typedef union PREFIX(fail_stack_elt) PREFIX(fail_stack_elt_t);
-
-typedef struct
-{
- PREFIX(fail_stack_elt_t) *stack;
- unsigned size;
- unsigned avail; /* Offset of next open position. */
-} PREFIX(fail_stack_type);
-
-# endif /* INT_IS_16BIT */
-
-# ifndef DEFINED_ONCE
-# define FAIL_STACK_EMPTY() (fail_stack.avail == 0)
-# define FAIL_STACK_PTR_EMPTY() (fail_stack_ptr->avail == 0)
-# define FAIL_STACK_FULL() (fail_stack.avail == fail_stack.size)
-# endif
-
-
-/* Define macros to initialize and free the failure stack.
- Do `return -2' if the alloc fails. */
-
-# ifdef MATCH_MAY_ALLOCATE
-# define INIT_FAIL_STACK() \
- do { \
- fail_stack.stack = (PREFIX(fail_stack_elt_t) *) \
- REGEX_ALLOCATE_STACK (INIT_FAILURE_ALLOC * sizeof (PREFIX(fail_stack_elt_t))); \
- \
- if (fail_stack.stack == NULL) \
- return -2; \
- \
- fail_stack.size = INIT_FAILURE_ALLOC; \
- fail_stack.avail = 0; \
- } while (0)
-
-# define RESET_FAIL_STACK() REGEX_FREE_STACK (fail_stack.stack)
-# else
-# define INIT_FAIL_STACK() \
- do { \
- fail_stack.avail = 0; \
- } while (0)
-
-# define RESET_FAIL_STACK()
-# endif
-
-
-/* Double the size of FAIL_STACK, up to approximately `re_max_failures' items.
-
- Return 1 if succeeds, and 0 if either ran out of memory
- allocating space for it or it was already too large.
-
- REGEX_REALLOCATE_STACK requires `destination' be declared. */
-
-# define DOUBLE_FAIL_STACK(fail_stack) \
- ((fail_stack).size > (unsigned) (re_max_failures * MAX_FAILURE_ITEMS) \
- ? 0 \
- : ((fail_stack).stack = (PREFIX(fail_stack_elt_t) *) \
- REGEX_REALLOCATE_STACK ((fail_stack).stack, \
- (fail_stack).size * sizeof (PREFIX(fail_stack_elt_t)), \
- ((fail_stack).size << 1) * sizeof (PREFIX(fail_stack_elt_t))),\
- \
- (fail_stack).stack == NULL \
- ? 0 \
- : ((fail_stack).size <<= 1, \
- 1)))
-
-
-/* Push pointer POINTER on FAIL_STACK.
- Return 1 if was able to do so and 0 if ran out of memory allocating
- space to do so. */
-# define PUSH_PATTERN_OP(POINTER, FAIL_STACK) \
- ((FAIL_STACK_FULL () \
- && !DOUBLE_FAIL_STACK (FAIL_STACK)) \
- ? 0 \
- : ((FAIL_STACK).stack[(FAIL_STACK).avail++].pointer = POINTER, \
- 1))
-
-/* Push a pointer value onto the failure stack.
- Assumes the variable `fail_stack'. Probably should only
- be called from within `PUSH_FAILURE_POINT'. */
-# define PUSH_FAILURE_POINTER(item) \
- fail_stack.stack[fail_stack.avail++].pointer = (UCHAR_T *) (item)
-
-/* This pushes an integer-valued item onto the failure stack.
- Assumes the variable `fail_stack'. Probably should only
- be called from within `PUSH_FAILURE_POINT'. */
-# define PUSH_FAILURE_INT(item) \
- fail_stack.stack[fail_stack.avail++].integer = (item)
-
-/* Push a fail_stack_elt_t value onto the failure stack.
- Assumes the variable `fail_stack'. Probably should only
- be called from within `PUSH_FAILURE_POINT'. */
-# define PUSH_FAILURE_ELT(item) \
- fail_stack.stack[fail_stack.avail++] = (item)
-
-/* These three POP... operations complement the three PUSH... operations.
- All assume that `fail_stack' is nonempty. */
-# define POP_FAILURE_POINTER() fail_stack.stack[--fail_stack.avail].pointer
-# define POP_FAILURE_INT() fail_stack.stack[--fail_stack.avail].integer
-# define POP_FAILURE_ELT() fail_stack.stack[--fail_stack.avail]
-
-/* Used to omit pushing failure point id's when we're not debugging. */
-# ifdef DEBUG
-# define DEBUG_PUSH PUSH_FAILURE_INT
-# define DEBUG_POP(item_addr) *(item_addr) = POP_FAILURE_INT ()
-# else
-# define DEBUG_PUSH(item)
-# define DEBUG_POP(item_addr)
-# endif
-
-
-/* Push the information about the state we will need
- if we ever fail back to it.
-
- Requires variables fail_stack, regstart, regend, reg_info, and
- num_regs_pushed be declared. DOUBLE_FAIL_STACK requires `destination'
- be declared.
-
- Does `return FAILURE_CODE' if runs out of memory. */
-
-# define PUSH_FAILURE_POINT(pattern_place, string_place, failure_code) \
- do { \
- char *destination; \
- /* Must be int, so when we don't save any registers, the arithmetic \
- of 0 + -1 isn't done as unsigned. */ \
- /* Can't be int, since there is not a shred of a guarantee that int \
- is wide enough to hold a value of something to which pointer can \
- be assigned */ \
- active_reg_t this_reg; \
- \
- DEBUG_STATEMENT (failure_id++); \
- DEBUG_STATEMENT (nfailure_points_pushed++); \
- DEBUG_PRINT2 ("\nPUSH_FAILURE_POINT #%u:\n", failure_id); \
- DEBUG_PRINT2 (" Before push, next avail: %d\n", (fail_stack).avail);\
- DEBUG_PRINT2 (" size: %d\n", (fail_stack).size);\
- \
- DEBUG_PRINT2 (" slots needed: %ld\n", NUM_FAILURE_ITEMS); \
- DEBUG_PRINT2 (" available: %d\n", REMAINING_AVAIL_SLOTS); \
- \
- /* Ensure we have enough space allocated for what we will push. */ \
- while (REMAINING_AVAIL_SLOTS < NUM_FAILURE_ITEMS) \
- { \
- if (!DOUBLE_FAIL_STACK (fail_stack)) \
- return failure_code; \
- \
- DEBUG_PRINT2 ("\n Doubled stack; size now: %d\n", \
- (fail_stack).size); \
- DEBUG_PRINT2 (" slots available: %d\n", REMAINING_AVAIL_SLOTS);\
- } \
- \
- /* Push the info, starting with the registers. */ \
- DEBUG_PRINT1 ("\n"); \
- \
- if (1) \
- for (this_reg = lowest_active_reg; this_reg <= highest_active_reg; \
- this_reg++) \
- { \
- DEBUG_PRINT2 (" Pushing reg: %lu\n", this_reg); \
- DEBUG_STATEMENT (num_regs_pushed++); \
- \
- DEBUG_PRINT2 (" start: %p\n", regstart[this_reg]); \
- PUSH_FAILURE_POINTER (regstart[this_reg]); \
- \
- DEBUG_PRINT2 (" end: %p\n", regend[this_reg]); \
- PUSH_FAILURE_POINTER (regend[this_reg]); \
- \
- DEBUG_PRINT2 (" info: %p\n ", \
- reg_info[this_reg].word.pointer); \
- DEBUG_PRINT2 (" match_null=%d", \
- REG_MATCH_NULL_STRING_P (reg_info[this_reg])); \
- DEBUG_PRINT2 (" active=%d", IS_ACTIVE (reg_info[this_reg])); \
- DEBUG_PRINT2 (" matched_something=%d", \
- MATCHED_SOMETHING (reg_info[this_reg])); \
- DEBUG_PRINT2 (" ever_matched=%d", \
- EVER_MATCHED_SOMETHING (reg_info[this_reg])); \
- DEBUG_PRINT1 ("\n"); \
- PUSH_FAILURE_ELT (reg_info[this_reg].word); \
- } \
- \
- DEBUG_PRINT2 (" Pushing low active reg: %ld\n", lowest_active_reg);\
- PUSH_FAILURE_INT (lowest_active_reg); \
- \
- DEBUG_PRINT2 (" Pushing high active reg: %ld\n", highest_active_reg);\
- PUSH_FAILURE_INT (highest_active_reg); \
- \
- DEBUG_PRINT2 (" Pushing pattern %p:\n", pattern_place); \
- DEBUG_PRINT_COMPILED_PATTERN (bufp, pattern_place, pend); \
- PUSH_FAILURE_POINTER (pattern_place); \
- \
- DEBUG_PRINT2 (" Pushing string %p: `", string_place); \
- DEBUG_PRINT_DOUBLE_STRING (string_place, string1, size1, string2, \
- size2); \
- DEBUG_PRINT1 ("'\n"); \
- PUSH_FAILURE_POINTER (string_place); \
- \
- DEBUG_PRINT2 (" Pushing failure id: %u\n", failure_id); \
- DEBUG_PUSH (failure_id); \
- } while (0)
-
-# ifndef DEFINED_ONCE
-/* This is the number of items that are pushed and popped on the stack
- for each register. */
-# define NUM_REG_ITEMS 3
-
-/* Individual items aside from the registers. */
-# ifdef DEBUG
-# define NUM_NONREG_ITEMS 5 /* Includes failure point id. */
-# else
-# define NUM_NONREG_ITEMS 4
-# endif
-
-/* We push at most this many items on the stack. */
-/* We used to use (num_regs - 1), which is the number of registers
- this regexp will save; but that was changed to 5
- to avoid stack overflow for a regexp with lots of parens. */
-# define MAX_FAILURE_ITEMS (5 * NUM_REG_ITEMS + NUM_NONREG_ITEMS)
-
-/* We actually push this many items. */
-# define NUM_FAILURE_ITEMS \
- (((0 \
- ? 0 : highest_active_reg - lowest_active_reg + 1) \
- * NUM_REG_ITEMS) \
- + NUM_NONREG_ITEMS)
-
-/* How many items can still be added to the stack without overflowing it. */
-# define REMAINING_AVAIL_SLOTS ((fail_stack).size - (fail_stack).avail)
-# endif /* not DEFINED_ONCE */
-
-
-/* Pops what PUSH_FAIL_STACK pushes.
-
- We restore into the parameters, all of which should be lvalues:
- STR -- the saved data position.
- PAT -- the saved pattern position.
- LOW_REG, HIGH_REG -- the highest and lowest active registers.
- REGSTART, REGEND -- arrays of string positions.
- REG_INFO -- array of information about each subexpression.
-
- Also assumes the variables `fail_stack' and (if debugging), `bufp',
- `pend', `string1', `size1', `string2', and `size2'. */
-# define POP_FAILURE_POINT(str, pat, low_reg, high_reg, regstart, regend, reg_info)\
-{ \
- DEBUG_STATEMENT (unsigned failure_id;) \
- active_reg_t this_reg; \
- const UCHAR_T *string_temp; \
- \
- assert (!FAIL_STACK_EMPTY ()); \
- \
- /* Remove failure points and point to how many regs pushed. */ \
- DEBUG_PRINT1 ("POP_FAILURE_POINT:\n"); \
- DEBUG_PRINT2 (" Before pop, next avail: %d\n", fail_stack.avail); \
- DEBUG_PRINT2 (" size: %d\n", fail_stack.size); \
- \
- assert (fail_stack.avail >= NUM_NONREG_ITEMS); \
- \
- DEBUG_POP (&failure_id); \
- DEBUG_PRINT2 (" Popping failure id: %u\n", failure_id); \
- \
- /* If the saved string location is NULL, it came from an \
- on_failure_keep_string_jump opcode, and we want to throw away the \
- saved NULL, thus retaining our current position in the string. */ \
- string_temp = POP_FAILURE_POINTER (); \
- if (string_temp != NULL) \
- str = (const CHAR_T *) string_temp; \
- \
- DEBUG_PRINT2 (" Popping string %p: `", str); \
- DEBUG_PRINT_DOUBLE_STRING (str, string1, size1, string2, size2); \
- DEBUG_PRINT1 ("'\n"); \
- \
- pat = (UCHAR_T *) POP_FAILURE_POINTER (); \
- DEBUG_PRINT2 (" Popping pattern %p:\n", pat); \
- DEBUG_PRINT_COMPILED_PATTERN (bufp, pat, pend); \
- \
- /* Restore register info. */ \
- high_reg = (active_reg_t) POP_FAILURE_INT (); \
- DEBUG_PRINT2 (" Popping high active reg: %ld\n", high_reg); \
- \
- low_reg = (active_reg_t) POP_FAILURE_INT (); \
- DEBUG_PRINT2 (" Popping low active reg: %ld\n", low_reg); \
- \
- if (1) \
- for (this_reg = high_reg; this_reg >= low_reg; this_reg--) \
- { \
- DEBUG_PRINT2 (" Popping reg: %ld\n", this_reg); \
- \
- reg_info[this_reg].word = POP_FAILURE_ELT (); \
- DEBUG_PRINT2 (" info: %p\n", \
- reg_info[this_reg].word.pointer); \
- \
- regend[this_reg] = (const CHAR_T *) POP_FAILURE_POINTER (); \
- DEBUG_PRINT2 (" end: %p\n", regend[this_reg]); \
- \
- regstart[this_reg] = (const CHAR_T *) POP_FAILURE_POINTER (); \
- DEBUG_PRINT2 (" start: %p\n", regstart[this_reg]); \
- } \
- else \
- { \
- for (this_reg = highest_active_reg; this_reg > high_reg; this_reg--) \
- { \
- reg_info[this_reg].word.integer = 0; \
- regend[this_reg] = 0; \
- regstart[this_reg] = 0; \
- } \
- highest_active_reg = high_reg; \
- } \
- \
- set_regs_matched_done = 0; \
- DEBUG_STATEMENT (nfailure_points_popped++); \
-} /* POP_FAILURE_POINT */
-\f
-/* Structure for per-register (a.k.a. per-group) information.
- Other register information, such as the
- starting and ending positions (which are addresses), and the list of
- inner groups (which is a bits list) are maintained in separate
- variables.
-
- We are making a (strictly speaking) nonportable assumption here: that
- the compiler will pack our bit fields into something that fits into
- the type of `word', i.e., is something that fits into one item on the
- failure stack. */
-
-
-/* Declarations and macros for re_match_2. */
-
-typedef union
-{
- PREFIX(fail_stack_elt_t) word;
- struct
- {
- /* This field is one if this group can match the empty string,
- zero if not. If not yet determined, `MATCH_NULL_UNSET_VALUE'. */
-# define MATCH_NULL_UNSET_VALUE 3
- unsigned match_null_string_p : 2;
- unsigned is_active : 1;
- unsigned matched_something : 1;
- unsigned ever_matched_something : 1;
- } bits;
-} PREFIX(register_info_type);
-
-# ifndef DEFINED_ONCE
-# define REG_MATCH_NULL_STRING_P(R) ((R).bits.match_null_string_p)
-# define IS_ACTIVE(R) ((R).bits.is_active)
-# define MATCHED_SOMETHING(R) ((R).bits.matched_something)
-# define EVER_MATCHED_SOMETHING(R) ((R).bits.ever_matched_something)
-
-
-/* Call this when have matched a real character; it sets `matched' flags
- for the subexpressions which we are currently inside. Also records
- that those subexprs have matched. */
-# define SET_REGS_MATCHED() \
- do \
- { \
- if (!set_regs_matched_done) \
- { \
- active_reg_t r; \
- set_regs_matched_done = 1; \
- for (r = lowest_active_reg; r <= highest_active_reg; r++) \
- { \
- MATCHED_SOMETHING (reg_info[r]) \
- = EVER_MATCHED_SOMETHING (reg_info[r]) \
- = 1; \
- } \
- } \
- } \
- while (0)
-# endif /* not DEFINED_ONCE */
-
-/* Registers are set to a sentinel when they haven't yet matched. */
-static CHAR_T PREFIX(reg_unset_dummy);
-# define REG_UNSET_VALUE (&PREFIX(reg_unset_dummy))
-# define REG_UNSET(e) ((e) == REG_UNSET_VALUE)
-
-/* Subroutine declarations and macros for regex_compile. */
-static void PREFIX(store_op1) (re_opcode_t op, UCHAR_T *loc, int arg);
-static void PREFIX(store_op2) (re_opcode_t op, UCHAR_T *loc,
- int arg1, int arg2);
-static void PREFIX(insert_op1) (re_opcode_t op, UCHAR_T *loc,
- int arg, UCHAR_T *end);
-static void PREFIX(insert_op2) (re_opcode_t op, UCHAR_T *loc,
- int arg1, int arg2, UCHAR_T *end);
-static boolean PREFIX(at_begline_loc_p) (const CHAR_T *pattern,
- const CHAR_T *p,
- reg_syntax_t syntax);
-static boolean PREFIX(at_endline_loc_p) (const CHAR_T *p,
- const CHAR_T *pend,
- reg_syntax_t syntax);
-# ifdef WCHAR
-static reg_errcode_t wcs_compile_range (CHAR_T range_start,
- const CHAR_T **p_ptr,
- const CHAR_T *pend,
- char *translate,
- reg_syntax_t syntax,
- UCHAR_T *b,
- CHAR_T *char_set);
-static void insert_space (int num, CHAR_T *loc, CHAR_T *end);
-# else /* BYTE */
-static reg_errcode_t byte_compile_range (unsigned int range_start,
- const char **p_ptr,
- const char *pend,
- char *translate,
- reg_syntax_t syntax,
- unsigned char *b);
-# endif /* WCHAR */
-
-/* Fetch the next character in the uncompiled pattern---translating it
- if necessary. Also cast from a signed character in the constant
- string passed to us by the user to an unsigned char that we can use
- as an array index (in, e.g., `translate'). */
-/* ifdef MBS_SUPPORT, we translate only if character <= 0xff,
- because it is impossible to allocate 4GB array for some encodings
- which have 4 byte character_set like UCS4. */
-# ifndef PATFETCH
-# ifdef WCHAR
-# define PATFETCH(c) \
- do {if (p == pend) return REG_EEND; \
- c = (UCHAR_T) *p++; \
- if (translate && (c <= 0xff)) c = (UCHAR_T) translate[c]; \
- } while (0)
-# else /* BYTE */
-# define PATFETCH(c) \
- do {if (p == pend) return REG_EEND; \
- c = (unsigned char) *p++; \
- if (translate) c = (unsigned char) translate[c]; \
- } while (0)
-# endif /* WCHAR */
-# endif
-
-/* Fetch the next character in the uncompiled pattern, with no
- translation. */
-# define PATFETCH_RAW(c) \
- do {if (p == pend) return REG_EEND; \
- c = (UCHAR_T) *p++; \
- } while (0)
-
-/* Go backwards one character in the pattern. */
-# define PATUNFETCH p--
-
-
-/* If `translate' is non-null, return translate[D], else just D. We
- cast the subscript to translate because some data is declared as
- `char *', to avoid warnings when a string constant is passed. But
- when we use a character as a subscript we must make it unsigned. */
-/* ifdef MBS_SUPPORT, we translate only if character <= 0xff,
- because it is impossible to allocate 4GB array for some encodings
- which have 4 byte character_set like UCS4. */
-
-# ifndef TRANSLATE
-# ifdef WCHAR
-# define TRANSLATE(d) \
- ((translate && ((UCHAR_T) (d)) <= 0xff) \
- ? (char) translate[(unsigned char) (d)] : (d))
-# else /* BYTE */
-# define TRANSLATE(d) \
- (translate ? (char) translate[(unsigned char) (d)] : (d))
-# endif /* WCHAR */
-# endif
-
-
-/* Macros for outputting the compiled pattern into `buffer'. */
-
-/* If the buffer isn't allocated when it comes in, use this. */
-# define INIT_BUF_SIZE (32 * sizeof(UCHAR_T))
-
-/* Make sure we have at least N more bytes of space in buffer. */
-# ifdef WCHAR
-# define GET_BUFFER_SPACE(n) \
- while (((unsigned long)b - (unsigned long)COMPILED_BUFFER_VAR \
- + (n)*sizeof(CHAR_T)) > bufp->allocated) \
- EXTEND_BUFFER ()
-# else /* BYTE */
-# define GET_BUFFER_SPACE(n) \
- while ((unsigned long) (b - bufp->buffer + (n)) > bufp->allocated) \
- EXTEND_BUFFER ()
-# endif /* WCHAR */
-
-/* Make sure we have one more byte of buffer space and then add C to it. */
-# define BUF_PUSH(c) \
- do { \
- GET_BUFFER_SPACE (1); \
- *b++ = (UCHAR_T) (c); \
- } while (0)
-
-
-/* Ensure we have two more bytes of buffer space and then append C1 and C2. */
-# define BUF_PUSH_2(c1, c2) \
- do { \
- GET_BUFFER_SPACE (2); \
- *b++ = (UCHAR_T) (c1); \
- *b++ = (UCHAR_T) (c2); \
- } while (0)
-
-
-/* As with BUF_PUSH_2, except for three bytes. */
-# define BUF_PUSH_3(c1, c2, c3) \
- do { \
- GET_BUFFER_SPACE (3); \
- *b++ = (UCHAR_T) (c1); \
- *b++ = (UCHAR_T) (c2); \
- *b++ = (UCHAR_T) (c3); \
- } while (0)
-
-/* Store a jump with opcode OP at LOC to location TO. We store a
- relative address offset by the three bytes the jump itself occupies. */
-# define STORE_JUMP(op, loc, to) \
- PREFIX(store_op1) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)))
-
-/* Likewise, for a two-argument jump. */
-# define STORE_JUMP2(op, loc, to, arg) \
- PREFIX(store_op2) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), arg)
-
-/* Like `STORE_JUMP', but for inserting. Assume `b' is the buffer end. */
-# define INSERT_JUMP(op, loc, to) \
- PREFIX(insert_op1) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)), b)
-
-/* Like `STORE_JUMP2', but for inserting. Assume `b' is the buffer end. */
-# define INSERT_JUMP2(op, loc, to, arg) \
- PREFIX(insert_op2) (op, loc, (int) ((to) - (loc) - (1 + OFFSET_ADDRESS_SIZE)),\
- arg, b)
-
-/* This is not an arbitrary limit: the arguments which represent offsets
- into the pattern are two bytes long. So if 2^16 bytes turns out to
- be too small, many things would have to change. */
-/* Any other compiler which, like MSC, has allocation limit below 2^16
- bytes will have to use approach similar to what was done below for
- MSC and drop MAX_BUF_SIZE a bit. Otherwise you may end up
- reallocating to 0 bytes. Such thing is not going to work too well.
- You have been warned!! */
-# ifndef DEFINED_ONCE
-# if defined _MSC_VER && !defined WIN32
-/* Microsoft C 16-bit versions limit malloc to approx 65512 bytes.
- The REALLOC define eliminates a flurry of conversion warnings,
- but is not required. */
-# define MAX_BUF_SIZE 65500L
-# define REALLOC(p,s) realloc ((p), (size_t) (s))
-# else
-# define MAX_BUF_SIZE (1L << 16)
-# define REALLOC(p,s) realloc ((p), (s))
-# endif
-
-/* Extend the buffer by twice its current size via realloc and
- reset the pointers that pointed into the old block to point to the
- correct places in the new one. If extending the buffer results in it
- being larger than MAX_BUF_SIZE, then flag memory exhausted. */
-# if __BOUNDED_POINTERS__
-# define SET_HIGH_BOUND(P) (__ptrhigh (P) = __ptrlow (P) + bufp->allocated)
-# define MOVE_BUFFER_POINTER(P) \
- (__ptrlow (P) += incr, SET_HIGH_BOUND (P), __ptrvalue (P) += incr)
-# define ELSE_EXTEND_BUFFER_HIGH_BOUND \
- else \
- { \
- SET_HIGH_BOUND (b); \
- SET_HIGH_BOUND (begalt); \
- if (fixup_alt_jump) \
- SET_HIGH_BOUND (fixup_alt_jump); \
- if (laststart) \
- SET_HIGH_BOUND (laststart); \
- if (pending_exact) \
- SET_HIGH_BOUND (pending_exact); \
- }
-# else
-# define MOVE_BUFFER_POINTER(P) (P) += incr
-# define ELSE_EXTEND_BUFFER_HIGH_BOUND
-# endif
-# endif /* not DEFINED_ONCE */
-
-# ifdef WCHAR
-# define EXTEND_BUFFER() \
- do { \
- UCHAR_T *old_buffer = COMPILED_BUFFER_VAR; \
- int wchar_count; \
- if (bufp->allocated + sizeof(UCHAR_T) > MAX_BUF_SIZE) \
- return REG_ESIZE; \
- bufp->allocated <<= 1; \
- if (bufp->allocated > MAX_BUF_SIZE) \
- bufp->allocated = MAX_BUF_SIZE; \
- /* How many characters the new buffer can have? */ \
- wchar_count = bufp->allocated / sizeof(UCHAR_T); \
- if (wchar_count == 0) wchar_count = 1; \
- /* Truncate the buffer to CHAR_T align. */ \
- bufp->allocated = wchar_count * sizeof(UCHAR_T); \
- RETALLOC (COMPILED_BUFFER_VAR, wchar_count, UCHAR_T); \
- bufp->buffer = (char*)COMPILED_BUFFER_VAR; \
- if (COMPILED_BUFFER_VAR == NULL) \
- return REG_ESPACE; \
- /* If the buffer moved, move all the pointers into it. */ \
- if (old_buffer != COMPILED_BUFFER_VAR) \
- { \
- int incr = COMPILED_BUFFER_VAR - old_buffer; \
- MOVE_BUFFER_POINTER (b); \
- MOVE_BUFFER_POINTER (begalt); \
- if (fixup_alt_jump) \
- MOVE_BUFFER_POINTER (fixup_alt_jump); \
- if (laststart) \
- MOVE_BUFFER_POINTER (laststart); \
- if (pending_exact) \
- MOVE_BUFFER_POINTER (pending_exact); \
- } \
- ELSE_EXTEND_BUFFER_HIGH_BOUND \
- } while (0)
-# else /* BYTE */
-# define EXTEND_BUFFER() \
- do { \
- UCHAR_T *old_buffer = COMPILED_BUFFER_VAR; \
- if (bufp->allocated == MAX_BUF_SIZE) \
- return REG_ESIZE; \
- bufp->allocated <<= 1; \
- if (bufp->allocated > MAX_BUF_SIZE) \
- bufp->allocated = MAX_BUF_SIZE; \
- bufp->buffer \
- = (UCHAR_T *) REALLOC (COMPILED_BUFFER_VAR, bufp->allocated); \
- if (COMPILED_BUFFER_VAR == NULL) \
- return REG_ESPACE; \
- /* If the buffer moved, move all the pointers into it. */ \
- if (old_buffer != COMPILED_BUFFER_VAR) \
- { \
- int incr = COMPILED_BUFFER_VAR - old_buffer; \
- MOVE_BUFFER_POINTER (b); \
- MOVE_BUFFER_POINTER (begalt); \
- if (fixup_alt_jump) \
- MOVE_BUFFER_POINTER (fixup_alt_jump); \
- if (laststart) \
- MOVE_BUFFER_POINTER (laststart); \
- if (pending_exact) \
- MOVE_BUFFER_POINTER (pending_exact); \
- } \
- ELSE_EXTEND_BUFFER_HIGH_BOUND \
- } while (0)
-# endif /* WCHAR */
-
-# ifndef DEFINED_ONCE
-/* Since we have one byte reserved for the register number argument to
- {start,stop}_memory, the maximum number of groups we can report
- things about is what fits in that byte. */
-# define MAX_REGNUM 255
-
-/* But patterns can have more than `MAX_REGNUM' registers. We just
- ignore the excess. */
-typedef unsigned regnum_t;
-
-
-/* Macros for the compile stack. */
-
-/* Since offsets can go either forwards or backwards, this type needs to
- be able to hold values from -(MAX_BUF_SIZE - 1) to MAX_BUF_SIZE - 1. */
-/* int may be not enough when sizeof(int) == 2. */
-typedef long pattern_offset_t;
-
-typedef struct
-{
- pattern_offset_t begalt_offset;
- pattern_offset_t fixup_alt_jump;
- pattern_offset_t inner_group_offset;
- pattern_offset_t laststart_offset;
- regnum_t regnum;
-} compile_stack_elt_t;
-
-
-typedef struct
-{
- compile_stack_elt_t *stack;
- unsigned size;
- unsigned avail; /* Offset of next open position. */
-} compile_stack_type;
-
-
-# define INIT_COMPILE_STACK_SIZE 32
-
-# define COMPILE_STACK_EMPTY (compile_stack.avail == 0)
-# define COMPILE_STACK_FULL (compile_stack.avail == compile_stack.size)
-
-/* The next available element. */
-# define COMPILE_STACK_TOP (compile_stack.stack[compile_stack.avail])
-
-# endif /* not DEFINED_ONCE */
-
-/* Set the bit for character C in a list. */
-# ifndef DEFINED_ONCE
-# define SET_LIST_BIT(c) \
- (b[((unsigned char) (c)) / BYTEWIDTH] \
- |= 1 << (((unsigned char) c) % BYTEWIDTH))
-# endif /* DEFINED_ONCE */
-
-/* Get the next unsigned number in the uncompiled pattern. */
-# define GET_UNSIGNED_NUMBER(num) \
- { \
- while (p != pend) \
- { \
- PATFETCH (c); \
- if (c < '0' || c > '9') \
- break; \
- if (num <= RE_DUP_MAX) \
- { \
- if (num < 0) \
- num = 0; \
- num = num * 10 + c - '0'; \
- } \
- } \
- }
-
-# ifndef DEFINED_ONCE
-# if defined _LIBC || WIDE_CHAR_SUPPORT
-/* The GNU C library provides support for user-defined character classes
- and the functions from ISO C amendement 1. */
-# ifdef CHARCLASS_NAME_MAX
-# define CHAR_CLASS_MAX_LENGTH CHARCLASS_NAME_MAX
-# else
-/* This shouldn't happen but some implementation might still have this
- problem. Use a reasonable default value. */
-# define CHAR_CLASS_MAX_LENGTH 256
-# endif
-
-# ifdef _LIBC
-# define IS_CHAR_CLASS(string) __wctype (string)
-# else
-# define IS_CHAR_CLASS(string) wctype (string)
-# endif
-# else
-# define CHAR_CLASS_MAX_LENGTH 6 /* Namely, `xdigit'. */
-
-# define IS_CHAR_CLASS(string) \
- (STREQ (string, "alpha") || STREQ (string, "upper") \
- || STREQ (string, "lower") || STREQ (string, "digit") \
- || STREQ (string, "alnum") || STREQ (string, "xdigit") \
- || STREQ (string, "space") || STREQ (string, "print") \
- || STREQ (string, "punct") || STREQ (string, "graph") \
- || STREQ (string, "cntrl") || STREQ (string, "blank"))
-# endif
-# endif /* DEFINED_ONCE */
-\f
-# ifndef MATCH_MAY_ALLOCATE
-
-/* If we cannot allocate large objects within re_match_2_internal,
- we make the fail stack and register vectors global.
- The fail stack, we grow to the maximum size when a regexp
- is compiled.
- The register vectors, we adjust in size each time we
- compile a regexp, according to the number of registers it needs. */
-
-static PREFIX(fail_stack_type) fail_stack;
-
-/* Size with which the following vectors are currently allocated.
- That is so we can make them bigger as needed,
- but never make them smaller. */
-# ifdef DEFINED_ONCE
-static int regs_allocated_size;
-
-static const char ** regstart, ** regend;
-static const char ** old_regstart, ** old_regend;
-static const char **best_regstart, **best_regend;
-static const char **reg_dummy;
-# endif /* DEFINED_ONCE */
-
-static PREFIX(register_info_type) *PREFIX(reg_info);
-static PREFIX(register_info_type) *PREFIX(reg_info_dummy);
-
-/* Make the register vectors big enough for NUM_REGS registers,
- but don't make them smaller. */
-
-static void
-PREFIX(regex_grow_registers) (int num_regs)
-{
- if (num_regs > regs_allocated_size)
- {
- RETALLOC_IF (regstart, num_regs, const char *);
- RETALLOC_IF (regend, num_regs, const char *);
- RETALLOC_IF (old_regstart, num_regs, const char *);
- RETALLOC_IF (old_regend, num_regs, const char *);
- RETALLOC_IF (best_regstart, num_regs, const char *);
- RETALLOC_IF (best_regend, num_regs, const char *);
- RETALLOC_IF (PREFIX(reg_info), num_regs, PREFIX(register_info_type));
- RETALLOC_IF (reg_dummy, num_regs, const char *);
- RETALLOC_IF (PREFIX(reg_info_dummy), num_regs, PREFIX(register_info_type));
-
- regs_allocated_size = num_regs;
- }
-}
-
-# endif /* not MATCH_MAY_ALLOCATE */
-\f
-# ifndef DEFINED_ONCE
-static boolean group_in_compile_stack (compile_stack_type
- compile_stack,
- regnum_t regnum);
-# endif /* not DEFINED_ONCE */
-
-/* `regex_compile' compiles PATTERN (of length SIZE) according to SYNTAX.
- Returns one of error codes defined in `regex.h', or zero for success.
-
- Assumes the `allocated' (and perhaps `buffer') and `translate'
- fields are set in BUFP on entry.
-
- If it succeeds, results are put in BUFP (if it returns an error, the
- contents of BUFP are undefined):
- `buffer' is the compiled pattern;
- `syntax' is set to SYNTAX;
- `used' is set to the length of the compiled pattern;
- `fastmap_accurate' is zero;
- `re_nsub' is the number of subexpressions in PATTERN;
- `not_bol' and `not_eol' are zero;
-
- The `fastmap' and `newline_anchor' fields are neither
- examined nor set. */
-
-/* Return, freeing storage we allocated. */
-# ifdef WCHAR
-# define FREE_STACK_RETURN(value) \
- return (free(pattern), free(mbs_offset), free(is_binary), free (compile_stack.stack), value)
-# else
-# define FREE_STACK_RETURN(value) \
- return (free (compile_stack.stack), value)
-# endif /* WCHAR */
-
-static reg_errcode_t
-PREFIX(regex_compile) (const char *ARG_PREFIX(pattern),
- size_t ARG_PREFIX(size),
- reg_syntax_t syntax,
- struct re_pattern_buffer *bufp)
-{
- /* We fetch characters from PATTERN here. Even though PATTERN is
- `char *' (i.e., signed), we declare these variables as unsigned, so
- they can be reliably used as array indices. */
- register UCHAR_T c, c1;
-
-#ifdef WCHAR
- /* A temporary space to keep wchar_t pattern and compiled pattern. */
- CHAR_T *pattern, *COMPILED_BUFFER_VAR;
- size_t size;
- /* offset buffer for optimization. See convert_mbs_to_wc. */
- int *mbs_offset = NULL;
- /* It hold whether each wchar_t is binary data or not. */
- char *is_binary = NULL;
- /* A flag whether exactn is handling binary data or not. */
- char is_exactn_bin = FALSE;
-#endif /* WCHAR */
-
- /* A random temporary spot in PATTERN. */
- const CHAR_T *p1;
-
- /* Points to the end of the buffer, where we should append. */
- register UCHAR_T *b;
-
- /* Keeps track of unclosed groups. */
- compile_stack_type compile_stack;
-
- /* Points to the current (ending) position in the pattern. */
-#ifdef WCHAR
- const CHAR_T *p;
- const CHAR_T *pend;
-#else /* BYTE */
- const CHAR_T *p = pattern;
- const CHAR_T *pend = pattern + size;
-#endif /* WCHAR */
-
- /* How to translate the characters in the pattern. */
- RE_TRANSLATE_TYPE translate = bufp->translate;
-
- /* Address of the count-byte of the most recently inserted `exactn'
- command. This makes it possible to tell if a new exact-match
- character can be added to that command or if the character requires
- a new `exactn' command. */
- UCHAR_T *pending_exact = 0;
-
- /* Address of start of the most recently finished expression.
- This tells, e.g., postfix * where to find the start of its
- operand. Reset at the beginning of groups and alternatives. */
- UCHAR_T *laststart = 0;
-
- /* Address of beginning of regexp, or inside of last group. */
- UCHAR_T *begalt;
-
- /* Address of the place where a forward jump should go to the end of
- the containing expression. Each alternative of an `or' -- except the
- last -- ends with a forward jump of this sort. */
- UCHAR_T *fixup_alt_jump = 0;
-
- /* Counts open-groups as they are encountered. Remembered for the
- matching close-group on the compile stack, so the same register
- number is put in the stop_memory as the start_memory. */
- regnum_t regnum = 0;
-
-#ifdef WCHAR
- /* Initialize the wchar_t PATTERN and offset_buffer. */
- p = pend = pattern = TALLOC(csize + 1, CHAR_T);
- mbs_offset = TALLOC(csize + 1, int);
- is_binary = TALLOC(csize + 1, char);
- if (pattern == NULL || mbs_offset == NULL || is_binary == NULL)
- {
- free(pattern);
- free(mbs_offset);
- free(is_binary);
- return REG_ESPACE;
- }
- pattern[csize] = L'\0'; /* sentinel */
- size = convert_mbs_to_wcs(pattern, cpattern, csize, mbs_offset, is_binary);
- pend = p + size;
- if (size < 0)
- {
- free(pattern);
- free(mbs_offset);
- free(is_binary);
- return REG_BADPAT;
- }
-#endif
-
-#ifdef DEBUG
- DEBUG_PRINT1 ("\nCompiling pattern: ");
- if (debug)
- {
- unsigned debug_count;
-
- for (debug_count = 0; debug_count < size; debug_count++)
- PUT_CHAR (pattern[debug_count]);
- putchar ('\n');
- }
-#endif /* DEBUG */
-
- /* Initialize the compile stack. */
- compile_stack.stack = TALLOC (INIT_COMPILE_STACK_SIZE, compile_stack_elt_t);
- if (compile_stack.stack == NULL)
- {
-#ifdef WCHAR
- free(pattern);
- free(mbs_offset);
- free(is_binary);
-#endif
- return REG_ESPACE;
- }
-
- compile_stack.size = INIT_COMPILE_STACK_SIZE;
- compile_stack.avail = 0;
-
- /* Initialize the pattern buffer. */
- bufp->syntax = syntax;
- bufp->fastmap_accurate = 0;
- bufp->not_bol = bufp->not_eol = 0;
-
- /* Set `used' to zero, so that if we return an error, the pattern
- printer (for debugging) will think there's no pattern. We reset it
- at the end. */
- bufp->used = 0;
-
- /* Always count groups, whether or not bufp->no_sub is set. */
- bufp->re_nsub = 0;
-
-#if !defined emacs && !defined SYNTAX_TABLE
- /* Initialize the syntax table. */
- init_syntax_once ();
-#endif
-
- if (bufp->allocated == 0)
- {
- if (bufp->buffer)
- { /* If zero allocated, but buffer is non-null, try to realloc
- enough space. This loses if buffer's address is bogus, but
- that is the user's responsibility. */
-#ifdef WCHAR
- /* Free bufp->buffer and allocate an array for wchar_t pattern
- buffer. */
- free(bufp->buffer);
- COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE/sizeof(UCHAR_T),
- UCHAR_T);
-#else
- RETALLOC (COMPILED_BUFFER_VAR, INIT_BUF_SIZE, UCHAR_T);
-#endif /* WCHAR */
- }
- else
- { /* Caller did not allocate a buffer. Do it for them. */
- COMPILED_BUFFER_VAR = TALLOC (INIT_BUF_SIZE / sizeof(UCHAR_T),
- UCHAR_T);
- }
-
- if (!COMPILED_BUFFER_VAR) FREE_STACK_RETURN (REG_ESPACE);
-#ifdef WCHAR
- bufp->buffer = (char*)COMPILED_BUFFER_VAR;
-#endif /* WCHAR */
- bufp->allocated = INIT_BUF_SIZE;
- }
-#ifdef WCHAR
- else
- COMPILED_BUFFER_VAR = (UCHAR_T*) bufp->buffer;
-#endif
-
- begalt = b = COMPILED_BUFFER_VAR;
-
- /* Loop through the uncompiled pattern until we're at the end. */
- while (p != pend)
- {
- PATFETCH (c);
-
- switch (c)
- {
- case '^':
- {
- if ( /* If at start of pattern, it's an operator. */
- p == pattern + 1
- /* If context independent, it's an operator. */
- || syntax & RE_CONTEXT_INDEP_ANCHORS
- /* Otherwise, depends on what's come before. */
- || PREFIX(at_begline_loc_p) (pattern, p, syntax))
- BUF_PUSH (begline);
- else
- goto normal_char;
- }
- break;
-
-
- case '$':
- {
- if ( /* If at end of pattern, it's an operator. */
- p == pend
- /* If context independent, it's an operator. */
- || syntax & RE_CONTEXT_INDEP_ANCHORS
- /* Otherwise, depends on what's next. */
- || PREFIX(at_endline_loc_p) (p, pend, syntax))
- BUF_PUSH (endline);
- else
- goto normal_char;
- }
- break;
-
-
- case '+':
- case '?':
- if ((syntax & RE_BK_PLUS_QM)
- || (syntax & RE_LIMITED_OPS))
- goto normal_char;
- handle_plus:
- case '*':
- /* If there is no previous pattern... */
- if (!laststart)
- {
- if (syntax & RE_CONTEXT_INVALID_OPS)
- FREE_STACK_RETURN (REG_BADRPT);
- else if (!(syntax & RE_CONTEXT_INDEP_OPS))
- goto normal_char;
- }
-
- {
- /* Are we optimizing this jump? */
- boolean keep_string_p = false;
-
- /* 1 means zero (many) matches is allowed. */
- char zero_times_ok = 0, many_times_ok = 0;
-
- /* If there is a sequence of repetition chars, collapse it
- down to just one (the right one). We can't combine
- interval operators with these because of, e.g., `a{2}*',
- which should only match an even number of `a's. */
-
- for (;;)
- {
- zero_times_ok |= c != '+';
- many_times_ok |= c != '?';
-
- if (p == pend)
- break;
-
- PATFETCH (c);
-
- if (c == '*'
- || (!(syntax & RE_BK_PLUS_QM) && (c == '+' || c == '?')))
- ;
-
- else if (syntax & RE_BK_PLUS_QM && c == '\\')
- {
- if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
-
- PATFETCH (c1);
- if (!(c1 == '+' || c1 == '?'))
- {
- PATUNFETCH;
- PATUNFETCH;
- break;
- }
-
- c = c1;
- }
- else
- {
- PATUNFETCH;
- break;
- }
-
- /* If we get here, we found another repeat character. */
- }
-
- /* Star, etc. applied to an empty pattern is equivalent
- to an empty pattern. */
- if (!laststart)
- break;
-
- /* Now we know whether or not zero matches is allowed
- and also whether or not two or more matches is allowed. */
- if (many_times_ok)
- { /* More than one repetition is allowed, so put in at the
- end a backward relative jump from `b' to before the next
- jump we're going to put in below (which jumps from
- laststart to after this jump).
-
- But if we are at the `*' in the exact sequence `.*\n',
- insert an unconditional jump backwards to the .,
- instead of the beginning of the loop. This way we only
- push a failure point once, instead of every time
- through the loop. */
- assert (p - 1 > pattern);
-
- /* Allocate the space for the jump. */
- GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
-
- /* We know we are not at the first character of the pattern,
- because laststart was nonzero. And we've already
- incremented `p', by the way, to be the character after
- the `*'. Do we have to do something analogous here
- for null bytes, because of RE_DOT_NOT_NULL? */
- if (TRANSLATE (*(p - 2)) == TRANSLATE ('.')
- && zero_times_ok
- && p < pend && TRANSLATE (*p) == TRANSLATE ('\n')
- && !(syntax & RE_DOT_NEWLINE))
- { /* We have .*\n. */
- STORE_JUMP (jump, b, laststart);
- keep_string_p = true;
- }
- else
- /* Anything else. */
- STORE_JUMP (maybe_pop_jump, b, laststart -
- (1 + OFFSET_ADDRESS_SIZE));
-
- /* We've added more stuff to the buffer. */
- b += 1 + OFFSET_ADDRESS_SIZE;
- }
-
- /* On failure, jump from laststart to b + 3, which will be the
- end of the buffer after this jump is inserted. */
- /* ifdef WCHAR, 'b + 1 + OFFSET_ADDRESS_SIZE' instead of
- 'b + 3'. */
- GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
- INSERT_JUMP (keep_string_p ? on_failure_keep_string_jump
- : on_failure_jump,
- laststart, b + 1 + OFFSET_ADDRESS_SIZE);
- pending_exact = 0;
- b += 1 + OFFSET_ADDRESS_SIZE;
-
- if (!zero_times_ok)
- {
- /* At least one repetition is required, so insert a
- `dummy_failure_jump' before the initial
- `on_failure_jump' instruction of the loop. This
- effects a skip over that instruction the first time
- we hit that loop. */
- GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
- INSERT_JUMP (dummy_failure_jump, laststart, laststart +
- 2 + 2 * OFFSET_ADDRESS_SIZE);
- b += 1 + OFFSET_ADDRESS_SIZE;
- }
- }
- break;
-
-
- case '.':
- laststart = b;
- BUF_PUSH (anychar);
- break;
-
-
- case '[':
- {
- boolean had_char_class = false;
-#ifdef WCHAR
- CHAR_T range_start = 0xffffffff;
-#else
- unsigned int range_start = 0xffffffff;
-#endif
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
-#ifdef WCHAR
- /* We assume a charset(_not) structure as a wchar_t array.
- charset[0] = (re_opcode_t) charset(_not)
- charset[1] = l (= length of char_classes)
- charset[2] = m (= length of collating_symbols)
- charset[3] = n (= length of equivalence_classes)
- charset[4] = o (= length of char_ranges)
- charset[5] = p (= length of chars)
-
- charset[6] = char_class (wctype_t)
- charset[6+CHAR_CLASS_SIZE] = char_class (wctype_t)
- ...
- charset[l+5] = char_class (wctype_t)
-
- charset[l+6] = collating_symbol (wchar_t)
- ...
- charset[l+m+5] = collating_symbol (wchar_t)
- ifdef _LIBC we use the index if
- _NL_COLLATE_SYMB_EXTRAMB instead of
- wchar_t string.
-
- charset[l+m+6] = equivalence_classes (wchar_t)
- ...
- charset[l+m+n+5] = equivalence_classes (wchar_t)
- ifdef _LIBC we use the index in
- _NL_COLLATE_WEIGHT instead of
- wchar_t string.
-
- charset[l+m+n+6] = range_start
- charset[l+m+n+7] = range_end
- ...
- charset[l+m+n+2o+4] = range_start
- charset[l+m+n+2o+5] = range_end
- ifdef _LIBC we use the value looked up
- in _NL_COLLATE_COLLSEQ instead of
- wchar_t character.
-
- charset[l+m+n+2o+6] = char
- ...
- charset[l+m+n+2o+p+5] = char
-
- */
-
- /* We need at least 6 spaces: the opcode, the length of
- char_classes, the length of collating_symbols, the length of
- equivalence_classes, the length of char_ranges, the length of
- chars. */
- GET_BUFFER_SPACE (6);
-
- /* Save b as laststart. And We use laststart as the pointer
- to the first element of the charset here.
- In other words, laststart[i] indicates charset[i]. */
- laststart = b;
-
- /* We test `*p == '^' twice, instead of using an if
- statement, so we only need one BUF_PUSH. */
- BUF_PUSH (*p == '^' ? charset_not : charset);
- if (*p == '^')
- p++;
-
- /* Push the length of char_classes, the length of
- collating_symbols, the length of equivalence_classes, the
- length of char_ranges and the length of chars. */
- BUF_PUSH_3 (0, 0, 0);
- BUF_PUSH_2 (0, 0);
-
- /* Remember the first position in the bracket expression. */
- p1 = p;
-
- /* charset_not matches newline according to a syntax bit. */
- if ((re_opcode_t) b[-6] == charset_not
- && (syntax & RE_HAT_LISTS_NOT_NEWLINE))
- {
- BUF_PUSH('\n');
- laststart[5]++; /* Update the length of characters */
- }
-
- /* Read in characters and ranges, setting map bits. */
- for (;;)
- {
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- PATFETCH (c);
-
- /* \ might escape characters inside [...] and [^...]. */
- if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\')
- {
- if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
-
- PATFETCH (c1);
- BUF_PUSH(c1);
- laststart[5]++; /* Update the length of chars */
- range_start = c1;
- continue;
- }
-
- /* Could be the end of the bracket expression. If it's
- not (i.e., when the bracket expression is `[]' so
- far), the ']' character bit gets set way below. */
- if (c == ']' && p != p1 + 1)
- break;
-
- /* Look ahead to see if it's a range when the last thing
- was a character class. */
- if (had_char_class && c == '-' && *p != ']')
- FREE_STACK_RETURN (REG_ERANGE);
-
- /* Look ahead to see if it's a range when the last thing
- was a character: if this is a hyphen not at the
- beginning or the end of a list, then it's the range
- operator. */
- if (c == '-'
- && !(p - 2 >= pattern && p[-2] == '[')
- && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^')
- && *p != ']')
- {
- reg_errcode_t ret;
- /* Allocate the space for range_start and range_end. */
- GET_BUFFER_SPACE (2);
- /* Update the pointer to indicate end of buffer. */
- b += 2;
- ret = wcs_compile_range (range_start, &p, pend, translate,
- syntax, b, laststart);
- if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
- range_start = 0xffffffff;
- }
- else if (p[0] == '-' && p[1] != ']')
- { /* This handles ranges made up of characters only. */
- reg_errcode_t ret;
-
- /* Move past the `-'. */
- PATFETCH (c1);
- /* Allocate the space for range_start and range_end. */
- GET_BUFFER_SPACE (2);
- /* Update the pointer to indicate end of buffer. */
- b += 2;
- ret = wcs_compile_range (c, &p, pend, translate, syntax, b,
- laststart);
- if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
- range_start = 0xffffffff;
- }
-
- /* See if we're at the beginning of a possible character
- class. */
- else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':')
- { /* Leave room for the null. */
- char str[CHAR_CLASS_MAX_LENGTH + 1];
-
- PATFETCH (c);
- c1 = 0;
-
- /* If pattern is `[[:'. */
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (;;)
- {
- PATFETCH (c);
- if ((c == ':' && *p == ']') || p == pend)
- break;
- if (c1 < CHAR_CLASS_MAX_LENGTH)
- str[c1++] = c;
- else
- /* This is in any case an invalid class name. */
- str[0] = '\0';
- }
- str[c1] = '\0';
-
- /* If isn't a word bracketed by `[:' and `:]':
- undo the ending character, the letters, and leave
- the leading `:' and `[' (but store them as character). */
- if (c == ':' && *p == ']')
- {
- wctype_t wt;
- uintptr_t alignedp;
-
- /* Query the character class as wctype_t. */
- wt = IS_CHAR_CLASS (str);
- if (wt == 0)
- FREE_STACK_RETURN (REG_ECTYPE);
-
- /* Throw away the ] at the end of the character
- class. */
- PATFETCH (c);
-
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- /* Allocate the space for character class. */
- GET_BUFFER_SPACE(CHAR_CLASS_SIZE);
- /* Update the pointer to indicate end of buffer. */
- b += CHAR_CLASS_SIZE;
- /* Move data which follow character classes
- not to violate the data. */
- insert_space(CHAR_CLASS_SIZE,
- laststart + 6 + laststart[1],
- b - 1);
- alignedp = ((uintptr_t)(laststart + 6 + laststart[1])
- + __alignof__(wctype_t) - 1)
- & ~(uintptr_t)(__alignof__(wctype_t) - 1);
- /* Store the character class. */
- *((wctype_t*)alignedp) = wt;
- /* Update length of char_classes */
- laststart[1] += CHAR_CLASS_SIZE;
-
- had_char_class = true;
- }
- else
- {
- c1++;
- while (c1--)
- PATUNFETCH;
- BUF_PUSH ('[');
- BUF_PUSH (':');
- laststart[5] += 2; /* Update the length of characters */
- range_start = ':';
- had_char_class = false;
- }
- }
- else if (syntax & RE_CHAR_CLASSES && c == '[' && (*p == '='
- || *p == '.'))
- {
- CHAR_T str[128]; /* Should be large enough. */
- CHAR_T delim = *p; /* '=' or '.' */
-# ifdef _LIBC
- uint32_t nrules =
- _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
-# endif
- PATFETCH (c);
- c1 = 0;
-
- /* If pattern is `[[=' or '[[.'. */
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (;;)
- {
- PATFETCH (c);
- if ((c == delim && *p == ']') || p == pend)
- break;
- if (c1 < sizeof (str) - 1)
- str[c1++] = c;
- else
- /* This is in any case an invalid class name. */
- str[0] = '\0';
- }
- str[c1] = '\0';
-
- if (c == delim && *p == ']' && str[0] != '\0')
- {
- unsigned int i, offset;
- /* If we have no collation data we use the default
- collation in which each character is in a class
- by itself. It also means that ASCII is the
- character set and therefore we cannot have character
- with more than one byte in the multibyte
- representation. */
-
- /* If not defined _LIBC, we push the name and
- `\0' for the sake of matching performance. */
- int datasize = c1 + 1;
-
-# ifdef _LIBC
- int32_t idx = 0;
- if (nrules == 0)
-# endif
- {
- if (c1 != 1)
- FREE_STACK_RETURN (REG_ECOLLATE);
- }
-# ifdef _LIBC
- else
- {
- const int32_t *table;
- const int32_t *weights;
- const int32_t *extra;
- const int32_t *indirect;
- wint_t *cp;
-
- /* This #include defines a local function! */
-# include <locale/weightwc.h>
-
- if(delim == '=')
- {
- /* We push the index for equivalence class. */
- cp = (wint_t*)str;
-
- table = (const int32_t *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_TABLEWC);
- weights = (const int32_t *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_WEIGHTWC);
- extra = (const int32_t *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_EXTRAWC);
- indirect = (const int32_t *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_INDIRECTWC);
-
- idx = findidx ((const wint_t**)&cp);
- if (idx == 0 || cp < (wint_t*) str + c1)
- /* This is no valid character. */
- FREE_STACK_RETURN (REG_ECOLLATE);
-
- str[0] = (wchar_t)idx;
- }
- else /* delim == '.' */
- {
- /* We push collation sequence value
- for collating symbol. */
- int32_t table_size;
- const int32_t *symb_table;
- const unsigned char *extra;
- int32_t idx;
- int32_t elem;
- int32_t second;
- int32_t hash;
- char char_str[c1];
-
- /* We have to convert the name to a single-byte
- string. This is possible since the names
- consist of ASCII characters and the internal
- representation is UCS4. */
- for (i = 0; i < c1; ++i)
- char_str[i] = str[i];
-
- table_size =
- _NL_CURRENT_WORD (LC_COLLATE,
- _NL_COLLATE_SYMB_HASH_SIZEMB);
- symb_table = (const int32_t *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_SYMB_TABLEMB);
- extra = (const unsigned char *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_SYMB_EXTRAMB);
-
- /* Locate the character in the hashing table. */
- hash = elem_hash (char_str, c1);
-
- idx = 0;
- elem = hash % table_size;
- second = hash % (table_size - 2);
- while (symb_table[2 * elem] != 0)
- {
- /* First compare the hashing value. */
- if (symb_table[2 * elem] == hash
- && c1 == extra[symb_table[2 * elem + 1]]
- && memcmp (char_str,
- &extra[symb_table[2 * elem + 1]
- + 1], c1) == 0)
- {
- /* Yep, this is the entry. */
- idx = symb_table[2 * elem + 1];
- idx += 1 + extra[idx];
- break;
- }
-
- /* Next entry. */
- elem += second;
- }
-
- if (symb_table[2 * elem] != 0)
- {
- /* Compute the index of the byte sequence
- in the table. */
- idx += 1 + extra[idx];
- /* Adjust for the alignment. */
- idx = (idx + 3) & ~3;
-
- str[0] = (wchar_t) idx + 4;
- }
- else if (symb_table[2 * elem] == 0 && c1 == 1)
- {
- /* No valid character. Match it as a
- single byte character. */
- had_char_class = false;
- BUF_PUSH(str[0]);
- /* Update the length of characters */
- laststart[5]++;
- range_start = str[0];
-
- /* Throw away the ] at the end of the
- collating symbol. */
- PATFETCH (c);
- /* exit from the switch block. */
- continue;
- }
- else
- FREE_STACK_RETURN (REG_ECOLLATE);
- }
- datasize = 1;
- }
-# endif
- /* Throw away the ] at the end of the equivalence
- class (or collating symbol). */
- PATFETCH (c);
-
- /* Allocate the space for the equivalence class
- (or collating symbol) (and '\0' if needed). */
- GET_BUFFER_SPACE(datasize);
- /* Update the pointer to indicate end of buffer. */
- b += datasize;
-
- if (delim == '=')
- { /* equivalence class */
- /* Calculate the offset of char_ranges,
- which is next to equivalence_classes. */
- offset = laststart[1] + laststart[2]
- + laststart[3] +6;
- /* Insert space. */
- insert_space(datasize, laststart + offset, b - 1);
-
- /* Write the equivalence_class and \0. */
- for (i = 0 ; i < datasize ; i++)
- laststart[offset + i] = str[i];
-
- /* Update the length of equivalence_classes. */
- laststart[3] += datasize;
- had_char_class = true;
- }
- else /* delim == '.' */
- { /* collating symbol */
- /* Calculate the offset of the equivalence_classes,
- which is next to collating_symbols. */
- offset = laststart[1] + laststart[2] + 6;
- /* Insert space and write the collationg_symbol
- and \0. */
- insert_space(datasize, laststart + offset, b-1);
- for (i = 0 ; i < datasize ; i++)
- laststart[offset + i] = str[i];
-
- /* In re_match_2_internal if range_start < -1, we
- assume -range_start is the offset of the
- collating symbol which is specified as
- the character of the range start. So we assign
- -(laststart[1] + laststart[2] + 6) to
- range_start. */
- range_start = -(laststart[1] + laststart[2] + 6);
- /* Update the length of collating_symbol. */
- laststart[2] += datasize;
- had_char_class = false;
- }
- }
- else
- {
- c1++;
- while (c1--)
- PATUNFETCH;
- BUF_PUSH ('[');
- BUF_PUSH (delim);
- laststart[5] += 2; /* Update the length of characters */
- range_start = delim;
- had_char_class = false;
- }
- }
- else
- {
- had_char_class = false;
- BUF_PUSH(c);
- laststart[5]++; /* Update the length of characters */
- range_start = c;
- }
- }
-
-#else /* BYTE */
- /* Ensure that we have enough space to push a charset: the
- opcode, the length count, and the bitset; 34 bytes in all. */
- GET_BUFFER_SPACE (34);
-
- laststart = b;
-
- /* We test `*p == '^' twice, instead of using an if
- statement, so we only need one BUF_PUSH. */
- BUF_PUSH (*p == '^' ? charset_not : charset);
- if (*p == '^')
- p++;
-
- /* Remember the first position in the bracket expression. */
- p1 = p;
-
- /* Push the number of bytes in the bitmap. */
- BUF_PUSH ((1 << BYTEWIDTH) / BYTEWIDTH);
-
- /* Clear the whole map. */
- bzero (b, (1 << BYTEWIDTH) / BYTEWIDTH);
-
- /* charset_not matches newline according to a syntax bit. */
- if ((re_opcode_t) b[-2] == charset_not
- && (syntax & RE_HAT_LISTS_NOT_NEWLINE))
- SET_LIST_BIT ('\n');
-
- /* Read in characters and ranges, setting map bits. */
- for (;;)
- {
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- PATFETCH (c);
-
- /* \ might escape characters inside [...] and [^...]. */
- if ((syntax & RE_BACKSLASH_ESCAPE_IN_LISTS) && c == '\\')
- {
- if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
-
- PATFETCH (c1);
- SET_LIST_BIT (c1);
- range_start = c1;
- continue;
- }
-
- /* Could be the end of the bracket expression. If it's
- not (i.e., when the bracket expression is `[]' so
- far), the ']' character bit gets set way below. */
- if (c == ']' && p != p1 + 1)
- break;
-
- /* Look ahead to see if it's a range when the last thing
- was a character class. */
- if (had_char_class && c == '-' && *p != ']')
- FREE_STACK_RETURN (REG_ERANGE);
-
- /* Look ahead to see if it's a range when the last thing
- was a character: if this is a hyphen not at the
- beginning or the end of a list, then it's the range
- operator. */
- if (c == '-'
- && !(p - 2 >= pattern && p[-2] == '[')
- && !(p - 3 >= pattern && p[-3] == '[' && p[-2] == '^')
- && *p != ']')
- {
- reg_errcode_t ret
- = byte_compile_range (range_start, &p, pend, translate,
- syntax, b);
- if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
- range_start = 0xffffffff;
- }
-
- else if (p[0] == '-' && p[1] != ']')
- { /* This handles ranges made up of characters only. */
- reg_errcode_t ret;
-
- /* Move past the `-'. */
- PATFETCH (c1);
-
- ret = byte_compile_range (c, &p, pend, translate, syntax, b);
- if (ret != REG_NOERROR) FREE_STACK_RETURN (ret);
- range_start = 0xffffffff;
- }
-
- /* See if we're at the beginning of a possible character
- class. */
-
- else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == ':')
- { /* Leave room for the null. */
- char str[CHAR_CLASS_MAX_LENGTH + 1];
-
- PATFETCH (c);
- c1 = 0;
-
- /* If pattern is `[[:'. */
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (;;)
- {
- PATFETCH (c);
- if ((c == ':' && *p == ']') || p == pend)
- break;
- if (c1 < CHAR_CLASS_MAX_LENGTH)
- str[c1++] = c;
- else
- /* This is in any case an invalid class name. */
- str[0] = '\0';
- }
- str[c1] = '\0';
-
- /* If isn't a word bracketed by `[:' and `:]':
- undo the ending character, the letters, and leave
- the leading `:' and `[' (but set bits for them). */
- if (c == ':' && *p == ']')
- {
-# if defined _LIBC || WIDE_CHAR_SUPPORT
- boolean is_lower = STREQ (str, "lower");
- boolean is_upper = STREQ (str, "upper");
- wctype_t wt;
- int ch;
-
- wt = IS_CHAR_CLASS (str);
- if (wt == 0)
- FREE_STACK_RETURN (REG_ECTYPE);
-
- /* Throw away the ] at the end of the character
- class. */
- PATFETCH (c);
-
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (ch = 0; ch < 1 << BYTEWIDTH; ++ch)
- {
- if (iswctype (btowc (ch), wt))
- SET_LIST_BIT (ch);
-
- if (translate && (is_upper || is_lower)
- && (ISUPPER (ch) || ISLOWER (ch)))
- SET_LIST_BIT (ch);
- }
-
- had_char_class = true;
-# else
- int ch;
- boolean is_alnum = STREQ (str, "alnum");
- boolean is_alpha = STREQ (str, "alpha");
- boolean is_blank = STREQ (str, "blank");
- boolean is_cntrl = STREQ (str, "cntrl");
- boolean is_digit = STREQ (str, "digit");
- boolean is_graph = STREQ (str, "graph");
- boolean is_lower = STREQ (str, "lower");
- boolean is_print = STREQ (str, "print");
- boolean is_punct = STREQ (str, "punct");
- boolean is_space = STREQ (str, "space");
- boolean is_upper = STREQ (str, "upper");
- boolean is_xdigit = STREQ (str, "xdigit");
-
- if (!IS_CHAR_CLASS (str))
- FREE_STACK_RETURN (REG_ECTYPE);
-
- /* Throw away the ] at the end of the character
- class. */
- PATFETCH (c);
-
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (ch = 0; ch < 1 << BYTEWIDTH; ch++)
- {
- /* This was split into 3 if's to
- avoid an arbitrary limit in some compiler. */
- if ( (is_alnum && ISALNUM (ch))
- || (is_alpha && ISALPHA (ch))
- || (is_blank && ISBLANK (ch))
- || (is_cntrl && ISCNTRL (ch)))
- SET_LIST_BIT (ch);
- if ( (is_digit && ISDIGIT (ch))
- || (is_graph && ISGRAPH (ch))
- || (is_lower && ISLOWER (ch))
- || (is_print && ISPRINT (ch)))
- SET_LIST_BIT (ch);
- if ( (is_punct && ISPUNCT (ch))
- || (is_space && ISSPACE (ch))
- || (is_upper && ISUPPER (ch))
- || (is_xdigit && ISXDIGIT (ch)))
- SET_LIST_BIT (ch);
- if ( translate && (is_upper || is_lower)
- && (ISUPPER (ch) || ISLOWER (ch)))
- SET_LIST_BIT (ch);
- }
- had_char_class = true;
-# endif /* libc || wctype.h */
- }
- else
- {
- c1++;
- while (c1--)
- PATUNFETCH;
- SET_LIST_BIT ('[');
- SET_LIST_BIT (':');
- range_start = ':';
- had_char_class = false;
- }
- }
- else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '=')
- {
- unsigned char str[MB_LEN_MAX + 1];
-# ifdef _LIBC
- uint32_t nrules =
- _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
-# endif
-
- PATFETCH (c);
- c1 = 0;
-
- /* If pattern is `[[='. */
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (;;)
- {
- PATFETCH (c);
- if ((c == '=' && *p == ']') || p == pend)
- break;
- if (c1 < MB_LEN_MAX)
- str[c1++] = c;
- else
- /* This is in any case an invalid class name. */
- str[0] = '\0';
- }
- str[c1] = '\0';
-
- if (c == '=' && *p == ']' && str[0] != '\0')
- {
- /* If we have no collation data we use the default
- collation in which each character is in a class
- by itself. It also means that ASCII is the
- character set and therefore we cannot have character
- with more than one byte in the multibyte
- representation. */
-# ifdef _LIBC
- if (nrules == 0)
-# endif
- {
- if (c1 != 1)
- FREE_STACK_RETURN (REG_ECOLLATE);
-
- /* Throw away the ] at the end of the equivalence
- class. */
- PATFETCH (c);
-
- /* Set the bit for the character. */
- SET_LIST_BIT (str[0]);
- }
-# ifdef _LIBC
- else
- {
- /* Try to match the byte sequence in `str' against
- those known to the collate implementation.
- First find out whether the bytes in `str' are
- actually from exactly one character. */
- const int32_t *table;
- const unsigned char *weights;
- const unsigned char *extra;
- const int32_t *indirect;
- int32_t idx;
- const unsigned char *cp = str;
- int ch;
-
- /* This #include defines a local function! */
-# include <locale/weight.h>
-
- table = (const int32_t *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEMB);
- weights = (const unsigned char *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTMB);
- extra = (const unsigned char *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAMB);
- indirect = (const int32_t *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTMB);
-
- idx = findidx (&cp);
- if (idx == 0 || cp < str + c1)
- /* This is no valid character. */
- FREE_STACK_RETURN (REG_ECOLLATE);
-
- /* Throw away the ] at the end of the equivalence
- class. */
- PATFETCH (c);
-
- /* Now we have to go throught the whole table
- and find all characters which have the same
- first level weight.
-
- XXX Note that this is not entirely correct.
- we would have to match multibyte sequences
- but this is not possible with the current
- implementation. */
- for (ch = 1; ch < 256; ++ch)
- /* XXX This test would have to be changed if we
- would allow matching multibyte sequences. */
- if (table[ch] > 0)
- {
- int32_t idx2 = table[ch];
- size_t len = weights[idx2];
-
- /* Test whether the lenghts match. */
- if (weights[idx] == len)
- {
- /* They do. New compare the bytes of
- the weight. */
- size_t cnt = 0;
-
- while (cnt < len
- && (weights[idx + 1 + cnt]
- == weights[idx2 + 1 + cnt]))
- ++cnt;
-
- if (cnt == len)
- /* They match. Mark the character as
- acceptable. */
- SET_LIST_BIT (ch);
- }
- }
- }
-# endif
- had_char_class = true;
- }
- else
- {
- c1++;
- while (c1--)
- PATUNFETCH;
- SET_LIST_BIT ('[');
- SET_LIST_BIT ('=');
- range_start = '=';
- had_char_class = false;
- }
- }
- else if (syntax & RE_CHAR_CLASSES && c == '[' && *p == '.')
- {
- unsigned char str[128]; /* Should be large enough. */
-# ifdef _LIBC
- uint32_t nrules =
- _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
-# endif
-
- PATFETCH (c);
- c1 = 0;
-
- /* If pattern is `[[.'. */
- if (p == pend) FREE_STACK_RETURN (REG_EBRACK);
-
- for (;;)
- {
- PATFETCH (c);
- if ((c == '.' && *p == ']') || p == pend)
- break;
- if (c1 < sizeof (str))
- str[c1++] = c;
- else
- /* This is in any case an invalid class name. */
- str[0] = '\0';
- }
- str[c1] = '\0';
-
- if (c == '.' && *p == ']' && str[0] != '\0')
- {
- /* If we have no collation data we use the default
- collation in which each character is the name
- for its own class which contains only the one
- character. It also means that ASCII is the
- character set and therefore we cannot have character
- with more than one byte in the multibyte
- representation. */
-# ifdef _LIBC
- if (nrules == 0)
-# endif
- {
- if (c1 != 1)
- FREE_STACK_RETURN (REG_ECOLLATE);
-
- /* Throw away the ] at the end of the equivalence
- class. */
- PATFETCH (c);
-
- /* Set the bit for the character. */
- SET_LIST_BIT (str[0]);
- range_start = ((const unsigned char *) str)[0];
- }
-# ifdef _LIBC
- else
- {
- /* Try to match the byte sequence in `str' against
- those known to the collate implementation.
- First find out whether the bytes in `str' are
- actually from exactly one character. */
- int32_t table_size;
- const int32_t *symb_table;
- const unsigned char *extra;
- int32_t idx;
- int32_t elem;
- int32_t second;
- int32_t hash;
-
- table_size =
- _NL_CURRENT_WORD (LC_COLLATE,
- _NL_COLLATE_SYMB_HASH_SIZEMB);
- symb_table = (const int32_t *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_SYMB_TABLEMB);
- extra = (const unsigned char *)
- _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_SYMB_EXTRAMB);
-
- /* Locate the character in the hashing table. */
- hash = elem_hash (str, c1);
-
- idx = 0;
- elem = hash % table_size;
- second = hash % (table_size - 2);
- while (symb_table[2 * elem] != 0)
- {
- /* First compare the hashing value. */
- if (symb_table[2 * elem] == hash
- && c1 == extra[symb_table[2 * elem + 1]]
- && memcmp (str,
- &extra[symb_table[2 * elem + 1]
- + 1],
- c1) == 0)
- {
- /* Yep, this is the entry. */
- idx = symb_table[2 * elem + 1];
- idx += 1 + extra[idx];
- break;
- }
-
- /* Next entry. */
- elem += second;
- }
-
- if (symb_table[2 * elem] == 0)
- /* This is no valid character. */
- FREE_STACK_RETURN (REG_ECOLLATE);
-
- /* Throw away the ] at the end of the equivalence
- class. */
- PATFETCH (c);
-
- /* Now add the multibyte character(s) we found
- to the accept list.
-
- XXX Note that this is not entirely correct.
- we would have to match multibyte sequences
- but this is not possible with the current
- implementation. Also, we have to match
- collating symbols, which expand to more than
- one file, as a whole and not allow the
- individual bytes. */
- c1 = extra[idx++];
- if (c1 == 1)
- range_start = extra[idx];
- while (c1-- > 0)
- {
- SET_LIST_BIT (extra[idx]);
- ++idx;
- }
- }
-# endif
- had_char_class = false;
- }
- else
- {
- c1++;
- while (c1--)
- PATUNFETCH;
- SET_LIST_BIT ('[');
- SET_LIST_BIT ('.');
- range_start = '.';
- had_char_class = false;
- }
- }
- else
- {
- had_char_class = false;
- SET_LIST_BIT (c);
- range_start = c;
- }
- }
-
- /* Discard any (non)matching list bytes that are all 0 at the
- end of the map. Decrease the map-length byte too. */
- while ((int) b[-1] > 0 && b[b[-1] - 1] == 0)
- b[-1]--;
- b += b[-1];
-#endif /* WCHAR */
- }
- break;
-
-
- case '(':
- if (syntax & RE_NO_BK_PARENS)
- goto handle_open;
- else
- goto normal_char;
-
-
- case ')':
- if (syntax & RE_NO_BK_PARENS)
- goto handle_close;
- else
- goto normal_char;
-
-
- case '\n':
- if (syntax & RE_NEWLINE_ALT)
- goto handle_alt;
- else
- goto normal_char;
-
-
- case '|':
- if (syntax & RE_NO_BK_VBAR)
- goto handle_alt;
- else
- goto normal_char;
-
-
- case '{':
- if (syntax & RE_INTERVALS && syntax & RE_NO_BK_BRACES)
- goto handle_interval;
- else
- goto normal_char;
-
-
- case '\\':
- if (p == pend) FREE_STACK_RETURN (REG_EESCAPE);
-
- /* Do not translate the character after the \, so that we can
- distinguish, e.g., \B from \b, even if we normally would
- translate, e.g., B to b. */
- PATFETCH_RAW (c);
-
- switch (c)
- {
- case '(':
- if (syntax & RE_NO_BK_PARENS)
- goto normal_backslash;
-
- handle_open:
- bufp->re_nsub++;
- regnum++;
-
- if (COMPILE_STACK_FULL)
- {
- RETALLOC (compile_stack.stack, compile_stack.size << 1,
- compile_stack_elt_t);
- if (compile_stack.stack == NULL) return REG_ESPACE;
-
- compile_stack.size <<= 1;
- }
-
- /* These are the values to restore when we hit end of this
- group. They are all relative offsets, so that if the
- whole pattern moves because of realloc, they will still
- be valid. */
- COMPILE_STACK_TOP.begalt_offset = begalt - COMPILED_BUFFER_VAR;
- COMPILE_STACK_TOP.fixup_alt_jump
- = fixup_alt_jump ? fixup_alt_jump - COMPILED_BUFFER_VAR + 1 : 0;
- COMPILE_STACK_TOP.laststart_offset = b - COMPILED_BUFFER_VAR;
- COMPILE_STACK_TOP.regnum = regnum;
-
- /* We will eventually replace the 0 with the number of
- groups inner to this one. But do not push a
- start_memory for groups beyond the last one we can
- represent in the compiled pattern. */
- if (regnum <= MAX_REGNUM)
- {
- COMPILE_STACK_TOP.inner_group_offset = b
- - COMPILED_BUFFER_VAR + 2;
- BUF_PUSH_3 (start_memory, regnum, 0);
- }
-
- compile_stack.avail++;
-
- fixup_alt_jump = 0;
- laststart = 0;
- begalt = b;
- /* If we've reached MAX_REGNUM groups, then this open
- won't actually generate any code, so we'll have to
- clear pending_exact explicitly. */
- pending_exact = 0;
- break;
-
-
- case ')':
- if (syntax & RE_NO_BK_PARENS) goto normal_backslash;
-
- if (COMPILE_STACK_EMPTY)
- {
- if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD)
- goto normal_backslash;
- else
- FREE_STACK_RETURN (REG_ERPAREN);
- }
-
- handle_close:
- if (fixup_alt_jump)
- { /* Push a dummy failure point at the end of the
- alternative for a possible future
- `pop_failure_jump' to pop. See comments at
- `push_dummy_failure' in `re_match_2'. */
- BUF_PUSH (push_dummy_failure);
-
- /* We allocated space for this jump when we assigned
- to `fixup_alt_jump', in the `handle_alt' case below. */
- STORE_JUMP (jump_past_alt, fixup_alt_jump, b - 1);
- }
-
- /* See similar code for backslashed left paren above. */
- if (COMPILE_STACK_EMPTY)
- {
- if (syntax & RE_UNMATCHED_RIGHT_PAREN_ORD)
- goto normal_char;
- else
- FREE_STACK_RETURN (REG_ERPAREN);
- }
-
- /* Since we just checked for an empty stack above, this
- ``can't happen''. */
- assert (compile_stack.avail != 0);
- {
- /* We don't just want to restore into `regnum', because
- later groups should continue to be numbered higher,
- as in `(ab)c(de)' -- the second group is #2. */
- regnum_t this_group_regnum;
-
- compile_stack.avail--;
- begalt = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.begalt_offset;
- fixup_alt_jump
- = COMPILE_STACK_TOP.fixup_alt_jump
- ? COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.fixup_alt_jump - 1
- : 0;
- laststart = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.laststart_offset;
- this_group_regnum = COMPILE_STACK_TOP.regnum;
- /* If we've reached MAX_REGNUM groups, then this open
- won't actually generate any code, so we'll have to
- clear pending_exact explicitly. */
- pending_exact = 0;
-
- /* We're at the end of the group, so now we know how many
- groups were inside this one. */
- if (this_group_regnum <= MAX_REGNUM)
- {
- UCHAR_T *inner_group_loc
- = COMPILED_BUFFER_VAR + COMPILE_STACK_TOP.inner_group_offset;
-
- *inner_group_loc = regnum - this_group_regnum;
- BUF_PUSH_3 (stop_memory, this_group_regnum,
- regnum - this_group_regnum);
- }
- }
- break;
-
-
- case '|': /* `\|'. */
- if (syntax & RE_LIMITED_OPS || syntax & RE_NO_BK_VBAR)
- goto normal_backslash;
- handle_alt:
- if (syntax & RE_LIMITED_OPS)
- goto normal_char;
-
- /* Insert before the previous alternative a jump which
- jumps to this alternative if the former fails. */
- GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
- INSERT_JUMP (on_failure_jump, begalt,
- b + 2 + 2 * OFFSET_ADDRESS_SIZE);
- pending_exact = 0;
- b += 1 + OFFSET_ADDRESS_SIZE;
-
- /* The alternative before this one has a jump after it
- which gets executed if it gets matched. Adjust that
- jump so it will jump to this alternative's analogous
- jump (put in below, which in turn will jump to the next
- (if any) alternative's such jump, etc.). The last such
- jump jumps to the correct final destination. A picture:
- _____ _____
- | | | |
- | v | v
- a | b | c
-
- If we are at `b', then fixup_alt_jump right now points to a
- three-byte space after `a'. We'll put in the jump, set
- fixup_alt_jump to right after `b', and leave behind three
- bytes which we'll fill in when we get to after `c'. */
-
- if (fixup_alt_jump)
- STORE_JUMP (jump_past_alt, fixup_alt_jump, b);
-
- /* Mark and leave space for a jump after this alternative,
- to be filled in later either by next alternative or
- when know we're at the end of a series of alternatives. */
- fixup_alt_jump = b;
- GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
- b += 1 + OFFSET_ADDRESS_SIZE;
-
- laststart = 0;
- begalt = b;
- break;
-
-
- case '{':
- /* If \{ is a literal. */
- if (!(syntax & RE_INTERVALS)
- /* If we're at `\{' and it's not the open-interval
- operator. */
- || (syntax & RE_NO_BK_BRACES))
- goto normal_backslash;
-
- handle_interval:
- {
- /* If got here, then the syntax allows intervals. */
-
- /* At least (most) this many matches must be made. */
- int lower_bound = -1, upper_bound = -1;
-
- /* Place in the uncompiled pattern (i.e., just after
- the '{') to go back to if the interval is invalid. */
- const CHAR_T *beg_interval = p;
-
- if (p == pend)
- goto invalid_interval;
-
- GET_UNSIGNED_NUMBER (lower_bound);
-
- if (c == ',')
- {
- GET_UNSIGNED_NUMBER (upper_bound);
- if (upper_bound < 0)
- upper_bound = RE_DUP_MAX;
- }
- else
- /* Interval such as `{1}' => match exactly once. */
- upper_bound = lower_bound;
-
- if (! (0 <= lower_bound && lower_bound <= upper_bound))
- goto invalid_interval;
-
- if (!(syntax & RE_NO_BK_BRACES))
- {
- if (c != '\\' || p == pend)
- goto invalid_interval;
- PATFETCH (c);
- }
-
- if (c != '}')
- goto invalid_interval;
-
- /* If it's invalid to have no preceding re. */
- if (!laststart)
- {
- if (syntax & RE_CONTEXT_INVALID_OPS
- && !(syntax & RE_INVALID_INTERVAL_ORD))
- FREE_STACK_RETURN (REG_BADRPT);
- else if (syntax & RE_CONTEXT_INDEP_OPS)
- laststart = b;
- else
- goto unfetch_interval;
- }
-
- /* We just parsed a valid interval. */
-
- if (RE_DUP_MAX < upper_bound)
- FREE_STACK_RETURN (REG_BADBR);
-
- /* If the upper bound is zero, don't want to succeed at
- all; jump from `laststart' to `b + 3', which will be
- the end of the buffer after we insert the jump. */
- /* ifdef WCHAR, 'b + 1 + OFFSET_ADDRESS_SIZE'
- instead of 'b + 3'. */
- if (upper_bound == 0)
- {
- GET_BUFFER_SPACE (1 + OFFSET_ADDRESS_SIZE);
- INSERT_JUMP (jump, laststart, b + 1
- + OFFSET_ADDRESS_SIZE);
- b += 1 + OFFSET_ADDRESS_SIZE;
- }
-
- /* Otherwise, we have a nontrivial interval. When
- we're all done, the pattern will look like:
- set_number_at <jump count> <upper bound>
- set_number_at <succeed_n count> <lower bound>
- succeed_n <after jump addr> <succeed_n count>
- <body of loop>
- jump_n <succeed_n addr> <jump count>
- (The upper bound and `jump_n' are omitted if
- `upper_bound' is 1, though.) */
- else
- { /* If the upper bound is > 1, we need to insert
- more at the end of the loop. */
- unsigned nbytes = 2 + 4 * OFFSET_ADDRESS_SIZE +
- (upper_bound > 1) * (2 + 4 * OFFSET_ADDRESS_SIZE);
-
- GET_BUFFER_SPACE (nbytes);
-
- /* Initialize lower bound of the `succeed_n', even
- though it will be set during matching by its
- attendant `set_number_at' (inserted next),
- because `re_compile_fastmap' needs to know.
- Jump to the `jump_n' we might insert below. */
- INSERT_JUMP2 (succeed_n, laststart,
- b + 1 + 2 * OFFSET_ADDRESS_SIZE
- + (upper_bound > 1) * (1 + 2 * OFFSET_ADDRESS_SIZE)
- , lower_bound);
- b += 1 + 2 * OFFSET_ADDRESS_SIZE;
-
- /* Code to initialize the lower bound. Insert
- before the `succeed_n'. The `5' is the last two
- bytes of this `set_number_at', plus 3 bytes of
- the following `succeed_n'. */
- /* ifdef WCHAR, The '1+2*OFFSET_ADDRESS_SIZE'
- is the 'set_number_at', plus '1+OFFSET_ADDRESS_SIZE'
- of the following `succeed_n'. */
- PREFIX(insert_op2) (set_number_at, laststart, 1
- + 2 * OFFSET_ADDRESS_SIZE, lower_bound, b);
- b += 1 + 2 * OFFSET_ADDRESS_SIZE;
-
- if (upper_bound > 1)
- { /* More than one repetition is allowed, so
- append a backward jump to the `succeed_n'
- that starts this interval.
-
- When we've reached this during matching,
- we'll have matched the interval once, so
- jump back only `upper_bound - 1' times. */
- STORE_JUMP2 (jump_n, b, laststart
- + 2 * OFFSET_ADDRESS_SIZE + 1,
- upper_bound - 1);
- b += 1 + 2 * OFFSET_ADDRESS_SIZE;
-
- /* The location we want to set is the second
- parameter of the `jump_n'; that is `b-2' as
- an absolute address. `laststart' will be
- the `set_number_at' we're about to insert;
- `laststart+3' the number to set, the source
- for the relative address. But we are
- inserting into the middle of the pattern --
- so everything is getting moved up by 5.
- Conclusion: (b - 2) - (laststart + 3) + 5,
- i.e., b - laststart.
-
- We insert this at the beginning of the loop
- so that if we fail during matching, we'll
- reinitialize the bounds. */
- PREFIX(insert_op2) (set_number_at, laststart,
- b - laststart,
- upper_bound - 1, b);
- b += 1 + 2 * OFFSET_ADDRESS_SIZE;
- }
- }
- pending_exact = 0;
- break;
-
- invalid_interval:
- if (!(syntax & RE_INVALID_INTERVAL_ORD))
- FREE_STACK_RETURN (p == pend ? REG_EBRACE : REG_BADBR);
- unfetch_interval:
- /* Match the characters as literals. */
- p = beg_interval;
- c = '{';
- if (syntax & RE_NO_BK_BRACES)
- goto normal_char;
- else
- goto normal_backslash;
- }
-
-#ifdef emacs
- /* There is no way to specify the before_dot and after_dot
- operators. rms says this is ok. --karl */
- case '=':
- BUF_PUSH (at_dot);
- break;
-
- case 's':
- laststart = b;
- PATFETCH (c);
- BUF_PUSH_2 (syntaxspec, syntax_spec_code[c]);
- break;
-
- case 'S':
- laststart = b;
- PATFETCH (c);
- BUF_PUSH_2 (notsyntaxspec, syntax_spec_code[c]);
- break;
-#endif /* emacs */
-
-
- case 'w':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- laststart = b;
- BUF_PUSH (wordchar);
- break;
-
-
- case 'W':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- laststart = b;
- BUF_PUSH (notwordchar);
- break;
-
-
- case '<':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- BUF_PUSH (wordbeg);
- break;
-
- case '>':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- BUF_PUSH (wordend);
- break;
-
- case 'b':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- BUF_PUSH (wordbound);
- break;
-
- case 'B':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- BUF_PUSH (notwordbound);
- break;
-
- case '`':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- BUF_PUSH (begbuf);
- break;
-
- case '\'':
- if (syntax & RE_NO_GNU_OPS)
- goto normal_char;
- BUF_PUSH (endbuf);
- break;
-
- case '1': case '2': case '3': case '4': case '5':
- case '6': case '7': case '8': case '9':
- if (syntax & RE_NO_BK_REFS)
- goto normal_char;
-
- c1 = c - '0';
-
- if (c1 > regnum)
- FREE_STACK_RETURN (REG_ESUBREG);
-
- /* Can't back reference to a subexpression if inside of it. */
- if (group_in_compile_stack (compile_stack, (regnum_t) c1))
- goto normal_char;
-
- laststart = b;
- BUF_PUSH_2 (duplicate, c1);
- break;
-
-
- case '+':
- case '?':
- if (syntax & RE_BK_PLUS_QM)
- goto handle_plus;
- else
- goto normal_backslash;
-
- default:
- normal_backslash:
- /* You might think it would be useful for \ to mean
- not to translate; but if we don't translate it
- it will never match anything. */
- c = TRANSLATE (c);
- goto normal_char;
- }
- break;
-
-
- default:
- /* Expects the character in `c'. */
- normal_char:
- /* If no exactn currently being built. */
- if (!pending_exact
-#ifdef WCHAR
- /* If last exactn handle binary(or character) and
- new exactn handle character(or binary). */
- || is_exactn_bin != is_binary[p - 1 - pattern]
-#endif /* WCHAR */
-
- /* If last exactn not at current position. */
- || pending_exact + *pending_exact + 1 != b
-
- /* We have only one byte following the exactn for the count. */
- || *pending_exact == (1 << BYTEWIDTH) - 1
-
- /* If followed by a repetition operator. */
- || *p == '*' || *p == '^'
- || ((syntax & RE_BK_PLUS_QM)
- ? *p == '\\' && (p[1] == '+' || p[1] == '?')
- : (*p == '+' || *p == '?'))
- || ((syntax & RE_INTERVALS)
- && ((syntax & RE_NO_BK_BRACES)
- ? *p == '{'
- : (p[0] == '\\' && p[1] == '{'))))
- {
- /* Start building a new exactn. */
-
- laststart = b;
-
-#ifdef WCHAR
- /* Is this exactn binary data or character? */
- is_exactn_bin = is_binary[p - 1 - pattern];
- if (is_exactn_bin)
- BUF_PUSH_2 (exactn_bin, 0);
- else
- BUF_PUSH_2 (exactn, 0);
-#else
- BUF_PUSH_2 (exactn, 0);
-#endif /* WCHAR */
- pending_exact = b - 1;
- }
-
- BUF_PUSH (c);
- (*pending_exact)++;
- break;
- } /* switch (c) */
- } /* while p != pend */
-
-
- /* Through the pattern now. */
-
- if (fixup_alt_jump)
- STORE_JUMP (jump_past_alt, fixup_alt_jump, b);
-
- if (!COMPILE_STACK_EMPTY)
- FREE_STACK_RETURN (REG_EPAREN);
-
- /* If we don't want backtracking, force success
- the first time we reach the end of the compiled pattern. */
- if (syntax & RE_NO_POSIX_BACKTRACKING)
- BUF_PUSH (succeed);
-
-#ifdef WCHAR
- free (pattern);
- free (mbs_offset);
- free (is_binary);
-#endif
- free (compile_stack.stack);
-
- /* We have succeeded; set the length of the buffer. */
-#ifdef WCHAR
- bufp->used = (uintptr_t) b - (uintptr_t) COMPILED_BUFFER_VAR;
-#else
- bufp->used = b - bufp->buffer;
-#endif
-
-#ifdef DEBUG
- if (debug)
- {
- DEBUG_PRINT1 ("\nCompiled pattern: \n");
- PREFIX(print_compiled_pattern) (bufp);
- }
-#endif /* DEBUG */
-
-#ifndef MATCH_MAY_ALLOCATE
- /* Initialize the failure stack to the largest possible stack. This
- isn't necessary unless we're trying to avoid calling alloca in
- the search and match routines. */
- {
- int num_regs = bufp->re_nsub + 1;
-
- /* Since DOUBLE_FAIL_STACK refuses to double only if the current size
- is strictly greater than re_max_failures, the largest possible stack
- is 2 * re_max_failures failure points. */
- if (fail_stack.size < (2 * re_max_failures * MAX_FAILURE_ITEMS))
- {
- fail_stack.size = (2 * re_max_failures * MAX_FAILURE_ITEMS);
-
-# ifdef emacs
- if (! fail_stack.stack)
- fail_stack.stack
- = (PREFIX(fail_stack_elt_t) *) xmalloc (fail_stack.size
- * sizeof (PREFIX(fail_stack_elt_t)));
- else
- fail_stack.stack
- = (PREFIX(fail_stack_elt_t) *) xrealloc (fail_stack.stack,
- (fail_stack.size
- * sizeof (PREFIX(fail_stack_elt_t))));
-# else /* not emacs */
- if (! fail_stack.stack)
- fail_stack.stack
- = malloc (fail_stack.size * sizeof (PREFIX(fail_stack_elt_t)));
- else
- fail_stack.stack
- = realloc (fail_stack.stack,
- fail_stack.size * sizeof (PREFIX(fail_stack_elt_t)));
-# endif /* not emacs */
- }
-
- PREFIX(regex_grow_registers) (num_regs);
- }
-#endif /* not MATCH_MAY_ALLOCATE */
-
- return REG_NOERROR;
-} /* regex_compile */
-
-/* Subroutines for `regex_compile'. */
-
-/* Store OP at LOC followed by two-byte integer parameter ARG. */
-/* ifdef WCHAR, integer parameter is 1 wchar_t. */
-
-static void
-PREFIX(store_op1) (re_opcode_t op, UCHAR_T *loc, int arg)
-{
- *loc = (UCHAR_T) op;
- STORE_NUMBER (loc + 1, arg);
-}
-
-
-/* Like `store_op1', but for two two-byte parameters ARG1 and ARG2. */
-/* ifdef WCHAR, integer parameter is 1 wchar_t. */
-
-static void
-PREFIX(store_op2) (re_opcode_t op, UCHAR_T *loc, int arg1, int arg2)
-{
- *loc = (UCHAR_T) op;
- STORE_NUMBER (loc + 1, arg1);
- STORE_NUMBER (loc + 1 + OFFSET_ADDRESS_SIZE, arg2);
-}
-
-
-/* Copy the bytes from LOC to END to open up three bytes of space at LOC
- for OP followed by two-byte integer parameter ARG. */
-/* ifdef WCHAR, integer parameter is 1 wchar_t. */
-
-static void
-PREFIX(insert_op1) (re_opcode_t op, UCHAR_T *loc, int arg, UCHAR_T *end)
-{
- register UCHAR_T *pfrom = end;
- register UCHAR_T *pto = end + 1 + OFFSET_ADDRESS_SIZE;
-
- while (pfrom != loc)
- *--pto = *--pfrom;
-
- PREFIX(store_op1) (op, loc, arg);
-}
-
-
-/* Like `insert_op1', but for two two-byte parameters ARG1 and ARG2. */
-/* ifdef WCHAR, integer parameter is 1 wchar_t. */
-
-static void
-PREFIX(insert_op2) (re_opcode_t op, UCHAR_T *loc, int arg1, int arg2,
- UCHAR_T *end)
-{
- register UCHAR_T *pfrom = end;
- register UCHAR_T *pto = end + 1 + 2 * OFFSET_ADDRESS_SIZE;
-
- while (pfrom != loc)
- *--pto = *--pfrom;
-
- PREFIX(store_op2) (op, loc, arg1, arg2);
-}
-
-
-/* P points to just after a ^ in PATTERN. Return true if that ^ comes
- after an alternative or a begin-subexpression. We assume there is at
- least one character before the ^. */
-
-static boolean
-PREFIX(at_begline_loc_p) (const CHAR_T *pattern, const CHAR_T *p,
- reg_syntax_t syntax)
-{
- const CHAR_T *prev = p - 2;
- boolean prev_prev_backslash = prev > pattern && prev[-1] == '\\';
-
- return
- /* After a subexpression? */
- (*prev == '(' && (syntax & RE_NO_BK_PARENS || prev_prev_backslash))
- /* After an alternative? */
- || (*prev == '|' && (syntax & RE_NO_BK_VBAR || prev_prev_backslash));
-}
-
-
-/* The dual of at_begline_loc_p. This one is for $. We assume there is
- at least one character after the $, i.e., `P < PEND'. */
-
-static boolean
-PREFIX(at_endline_loc_p) (const CHAR_T *p, const CHAR_T *pend,
- reg_syntax_t syntax)
-{
- const CHAR_T *next = p;
- boolean next_backslash = *next == '\\';
- const CHAR_T *next_next = p + 1 < pend ? p + 1 : 0;
-
- return
- /* Before a subexpression? */
- (syntax & RE_NO_BK_PARENS ? *next == ')'
- : next_backslash && next_next && *next_next == ')')
- /* Before an alternative? */
- || (syntax & RE_NO_BK_VBAR ? *next == '|'
- : next_backslash && next_next && *next_next == '|');
-}
-
-#else /* not INSIDE_RECURSION */
-
-/* Returns true if REGNUM is in one of COMPILE_STACK's elements and
- false if it's not. */
-
-static boolean
-group_in_compile_stack (compile_stack_type compile_stack,
- regnum_t regnum)
-{
- int this_element;
-
- for (this_element = compile_stack.avail - 1;
- this_element >= 0;
- this_element--)
- if (compile_stack.stack[this_element].regnum == regnum)
- return true;
-
- return false;
-}
-#endif /* not INSIDE_RECURSION */
-
-#ifdef INSIDE_RECURSION
-
-#ifdef WCHAR
-/* This insert space, which size is "num", into the pattern at "loc".
- "end" must point the end of the allocated buffer. */
-static void
-insert_space (int num, CHAR_T *loc, CHAR_T *end)
-{
- register CHAR_T *pto = end;
- register CHAR_T *pfrom = end - num;
-
- while (pfrom >= loc)
- *pto-- = *pfrom--;
-}
-#endif /* WCHAR */
-
-#ifdef WCHAR
-static reg_errcode_t
-wcs_compile_range (CHAR_T range_start_char,
- const CHAR_T **p_ptr, const CHAR_T *pend,
- RE_TRANSLATE_TYPE translate, reg_syntax_t syntax,
- CHAR_T *b, CHAR_T *char_set)
-{
- const CHAR_T *p = *p_ptr;
- CHAR_T range_start, range_end;
- reg_errcode_t ret;
-# ifdef _LIBC
- uint32_t nrules;
- uint32_t start_val, end_val;
-# endif
- if (p == pend)
- return REG_ERANGE;
-
-# ifdef _LIBC
- nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
- if (nrules != 0)
- {
- const char *collseq = (const char *) _NL_CURRENT(LC_COLLATE,
- _NL_COLLATE_COLLSEQWC);
- const unsigned char *extra = (const unsigned char *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB);
-
- if (range_start_char < -1)
- {
- /* range_start is a collating symbol. */
- int32_t *wextra;
- /* Retreive the index and get collation sequence value. */
- wextra = (int32_t*)(extra + char_set[-range_start_char]);
- start_val = wextra[1 + *wextra];
- }
- else
- start_val = collseq_table_lookup(collseq, TRANSLATE(range_start_char));
-
- end_val = collseq_table_lookup (collseq, TRANSLATE (p[0]));
-
- /* Report an error if the range is empty and the syntax prohibits
- this. */
- ret = ((syntax & RE_NO_EMPTY_RANGES)
- && (start_val > end_val))? REG_ERANGE : REG_NOERROR;
-
- /* Insert space to the end of the char_ranges. */
- insert_space(2, b - char_set[5] - 2, b - 1);
- *(b - char_set[5] - 2) = (wchar_t)start_val;
- *(b - char_set[5] - 1) = (wchar_t)end_val;
- char_set[4]++; /* ranges_index */
- }
- else
-# endif
- {
- range_start = (range_start_char >= 0)? TRANSLATE (range_start_char):
- range_start_char;
- range_end = TRANSLATE (p[0]);
- /* Report an error if the range is empty and the syntax prohibits
- this. */
- ret = ((syntax & RE_NO_EMPTY_RANGES)
- && (range_start > range_end))? REG_ERANGE : REG_NOERROR;
-
- /* Insert space to the end of the char_ranges. */
- insert_space(2, b - char_set[5] - 2, b - 1);
- *(b - char_set[5] - 2) = range_start;
- *(b - char_set[5] - 1) = range_end;
- char_set[4]++; /* ranges_index */
- }
- /* Have to increment the pointer into the pattern string, so the
- caller isn't still at the ending character. */
- (*p_ptr)++;
-
- return ret;
-}
-#else /* BYTE */
-/* Read the ending character of a range (in a bracket expression) from the
- uncompiled pattern *P_PTR (which ends at PEND). We assume the
- starting character is in `P[-2]'. (`P[-1]' is the character `-'.)
- Then we set the translation of all bits between the starting and
- ending characters (inclusive) in the compiled pattern B.
-
- Return an error code.
-
- We use these short variable names so we can use the same macros as
- `regex_compile' itself. */
-
-static reg_errcode_t
-byte_compile_range (unsigned int range_start_char,
- const char **p_ptr, const char *pend,
- RE_TRANSLATE_TYPE translate, reg_syntax_t syntax,
- unsigned char *b)
-{
- unsigned this_char;
- const char *p = *p_ptr;
- reg_errcode_t ret;
-# if _LIBC
- const unsigned char *collseq;
- unsigned int start_colseq;
- unsigned int end_colseq;
-# else
- unsigned end_char;
-# endif
-
- if (p == pend)
- return REG_ERANGE;
-
- /* Have to increment the pointer into the pattern string, so the
- caller isn't still at the ending character. */
- (*p_ptr)++;
-
- /* Report an error if the range is empty and the syntax prohibits this. */
- ret = syntax & RE_NO_EMPTY_RANGES ? REG_ERANGE : REG_NOERROR;
-
-# if _LIBC
- collseq = (const unsigned char *) _NL_CURRENT (LC_COLLATE,
- _NL_COLLATE_COLLSEQMB);
-
- start_colseq = collseq[(unsigned char) TRANSLATE (range_start_char)];
- end_colseq = collseq[(unsigned char) TRANSLATE (p[0])];
- for (this_char = 0; this_char <= (unsigned char) -1; ++this_char)
- {
- unsigned int this_colseq = collseq[(unsigned char) TRANSLATE (this_char)];
-
- if (start_colseq <= this_colseq && this_colseq <= end_colseq)
- {
- SET_LIST_BIT (TRANSLATE (this_char));
- ret = REG_NOERROR;
- }
- }
-# else
- /* Here we see why `this_char' has to be larger than an `unsigned
- char' -- we would otherwise go into an infinite loop, since all
- characters <= 0xff. */
- range_start_char = TRANSLATE (range_start_char);
- /* TRANSLATE(p[0]) is casted to char (not unsigned char) in TRANSLATE,
- and some compilers cast it to int implicitly, so following for_loop
- may fall to (almost) infinite loop.
- e.g. If translate[p[0]] = 0xff, end_char may equals to 0xffffffff.
- To avoid this, we cast p[0] to unsigned int and truncate it. */
- end_char = ((unsigned)TRANSLATE(p[0]) & ((1 << BYTEWIDTH) - 1));
-
- for (this_char = range_start_char; this_char <= end_char; ++this_char)
- {
- SET_LIST_BIT (TRANSLATE (this_char));
- ret = REG_NOERROR;
- }
-# endif
-
- return ret;
-}
-#endif /* WCHAR */
-\f
-/* re_compile_fastmap computes a ``fastmap'' for the compiled pattern in
- BUFP. A fastmap records which of the (1 << BYTEWIDTH) possible
- characters can start a string that matches the pattern. This fastmap
- is used by re_search to skip quickly over impossible starting points.
-
- The caller must supply the address of a (1 << BYTEWIDTH)-byte data
- area as BUFP->fastmap.
-
- We set the `fastmap', `fastmap_accurate', and `can_be_null' fields in
- the pattern buffer.
-
- Returns 0 if we succeed, -2 if an internal error. */
-
-#ifdef WCHAR
-/* local function for re_compile_fastmap.
- truncate wchar_t character to char. */
-
-static unsigned char
-truncate_wchar (CHAR_T c)
-{
- unsigned char buf[MB_CUR_MAX];
- mbstate_t state;
- int retval;
- memset (&state, '\0', sizeof (state));
- retval = wcrtomb (buf, c, &state);
- return retval > 0 ? buf[0] : (unsigned char) c;
-}
-#endif /* WCHAR */
-
-static int
-PREFIX(re_compile_fastmap) (struct re_pattern_buffer *bufp)
-{
- int j, k;
-#ifdef MATCH_MAY_ALLOCATE
- PREFIX(fail_stack_type) fail_stack;
-#endif
-#ifndef REGEX_MALLOC
- char *destination;
-#endif
-
- register char *fastmap = bufp->fastmap;
-
-#ifdef WCHAR
- /* We need to cast pattern to (wchar_t*), because we casted this compiled
- pattern to (char*) in regex_compile. */
- UCHAR_T *pattern = (UCHAR_T*)bufp->buffer;
- register UCHAR_T *pend = (UCHAR_T*) (bufp->buffer + bufp->used);
-#else /* BYTE */
- UCHAR_T *pattern = bufp->buffer;
- register UCHAR_T *pend = pattern + bufp->used;
-#endif /* WCHAR */
- UCHAR_T *p = pattern;
-
-#ifdef REL_ALLOC
- /* This holds the pointer to the failure stack, when
- it is allocated relocatably. */
- fail_stack_elt_t *failure_stack_ptr;
-#endif
-
- /* Assume that each path through the pattern can be null until
- proven otherwise. We set this false at the bottom of switch
- statement, to which we get only if a particular path doesn't
- match the empty string. */
- boolean path_can_be_null = true;
-
- /* We aren't doing a `succeed_n' to begin with. */
- boolean succeed_n_p = false;
-
- assert (fastmap != NULL && p != NULL);
-
- INIT_FAIL_STACK ();
- bzero (fastmap, 1 << BYTEWIDTH); /* Assume nothing's valid. */
- bufp->fastmap_accurate = 1; /* It will be when we're done. */
- bufp->can_be_null = 0;
-
- while (1)
- {
- if (p == pend || *p == succeed)
- {
- /* We have reached the (effective) end of pattern. */
- if (!FAIL_STACK_EMPTY ())
- {
- bufp->can_be_null |= path_can_be_null;
-
- /* Reset for next path. */
- path_can_be_null = true;
-
- p = fail_stack.stack[--fail_stack.avail].pointer;
-
- continue;
- }
- else
- break;
- }
-
- /* We should never be about to go beyond the end of the pattern. */
- assert (p < pend);
-
- switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++))
- {
-
- /* I guess the idea here is to simply not bother with a fastmap
- if a backreference is used, since it's too hard to figure out
- the fastmap for the corresponding group. Setting
- `can_be_null' stops `re_search_2' from using the fastmap, so
- that is all we do. */
- case duplicate:
- bufp->can_be_null = 1;
- goto done;
-
-
- /* Following are the cases which match a character. These end
- with `break'. */
-
-#ifdef WCHAR
- case exactn:
- fastmap[truncate_wchar(p[1])] = 1;
- break;
-#else /* BYTE */
- case exactn:
- fastmap[p[1]] = 1;
- break;
-#endif /* WCHAR */
-#ifdef MBS_SUPPORT
- case exactn_bin:
- fastmap[p[1]] = 1;
- break;
-#endif
-
-#ifdef WCHAR
- /* It is hard to distinguish fastmap from (multi byte) characters
- which depends on current locale. */
- case charset:
- case charset_not:
- case wordchar:
- case notwordchar:
- bufp->can_be_null = 1;
- goto done;
-#else /* BYTE */
- case charset:
- for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--)
- if (p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH)))
- fastmap[j] = 1;
- break;
-
-
- case charset_not:
- /* Chars beyond end of map must be allowed. */
- for (j = *p * BYTEWIDTH; j < (1 << BYTEWIDTH); j++)
- fastmap[j] = 1;
-
- for (j = *p++ * BYTEWIDTH - 1; j >= 0; j--)
- if (!(p[j / BYTEWIDTH] & (1 << (j % BYTEWIDTH))))
- fastmap[j] = 1;
- break;
-
-
- case wordchar:
- for (j = 0; j < (1 << BYTEWIDTH); j++)
- if (SYNTAX (j) == Sword)
- fastmap[j] = 1;
- break;
-
-
- case notwordchar:
- for (j = 0; j < (1 << BYTEWIDTH); j++)
- if (SYNTAX (j) != Sword)
- fastmap[j] = 1;
- break;
-#endif /* WCHAR */
-
- case anychar:
- {
- int fastmap_newline = fastmap['\n'];
-
- /* `.' matches anything ... */
- for (j = 0; j < (1 << BYTEWIDTH); j++)
- fastmap[j] = 1;
-
- /* ... except perhaps newline. */
- if (!(bufp->syntax & RE_DOT_NEWLINE))
- fastmap['\n'] = fastmap_newline;
-
- /* Return if we have already set `can_be_null'; if we have,
- then the fastmap is irrelevant. Something's wrong here. */
- else if (bufp->can_be_null)
- goto done;
-
- /* Otherwise, have to check alternative paths. */
- break;
- }
-
-#ifdef emacs
- case syntaxspec:
- k = *p++;
- for (j = 0; j < (1 << BYTEWIDTH); j++)
- if (SYNTAX (j) == (enum syntaxcode) k)
- fastmap[j] = 1;
- break;
-
-
- case notsyntaxspec:
- k = *p++;
- for (j = 0; j < (1 << BYTEWIDTH); j++)
- if (SYNTAX (j) != (enum syntaxcode) k)
- fastmap[j] = 1;
- break;
-
-
- /* All cases after this match the empty string. These end with
- `continue'. */
-
-
- case before_dot:
- case at_dot:
- case after_dot:
- continue;
-#endif /* emacs */
-
-
- case no_op:
- case begline:
- case endline:
- case begbuf:
- case endbuf:
- case wordbound:
- case notwordbound:
- case wordbeg:
- case wordend:
- case push_dummy_failure:
- continue;
-
-
- case jump_n:
- case pop_failure_jump:
- case maybe_pop_jump:
- case jump:
- case jump_past_alt:
- case dummy_failure_jump:
- EXTRACT_NUMBER_AND_INCR (j, p);
- p += j;
- if (j > 0)
- continue;
-
- /* Jump backward implies we just went through the body of a
- loop and matched nothing. Opcode jumped to should be
- `on_failure_jump' or `succeed_n'. Just treat it like an
- ordinary jump. For a * loop, it has pushed its failure
- point already; if so, discard that as redundant. */
- if ((re_opcode_t) *p != on_failure_jump
- && (re_opcode_t) *p != succeed_n)
- continue;
-
- p++;
- EXTRACT_NUMBER_AND_INCR (j, p);
- p += j;
-
- /* If what's on the stack is where we are now, pop it. */
- if (!FAIL_STACK_EMPTY ()
- && fail_stack.stack[fail_stack.avail - 1].pointer == p)
- fail_stack.avail--;
-
- continue;
-
-
- case on_failure_jump:
- case on_failure_keep_string_jump:
- handle_on_failure_jump:
- EXTRACT_NUMBER_AND_INCR (j, p);
-
- /* For some patterns, e.g., `(a?)?', `p+j' here points to the
- end of the pattern. We don't want to push such a point,
- since when we restore it above, entering the switch will
- increment `p' past the end of the pattern. We don't need
- to push such a point since we obviously won't find any more
- fastmap entries beyond `pend'. Such a pattern can match
- the null string, though. */
- if (p + j < pend)
- {
- if (!PUSH_PATTERN_OP (p + j, fail_stack))
- {
- RESET_FAIL_STACK ();
- return -2;
- }
- }
- else
- bufp->can_be_null = 1;
-
- if (succeed_n_p)
- {
- EXTRACT_NUMBER_AND_INCR (k, p); /* Skip the n. */
- succeed_n_p = false;
- }
-
- continue;
-
-
- case succeed_n:
- /* Get to the number of times to succeed. */
- p += OFFSET_ADDRESS_SIZE;
-
- /* Increment p past the n for when k != 0. */
- EXTRACT_NUMBER_AND_INCR (k, p);
- if (k == 0)
- {
- p -= 2 * OFFSET_ADDRESS_SIZE;
- succeed_n_p = true; /* Spaghetti code alert. */
- goto handle_on_failure_jump;
- }
- continue;
-
-
- case set_number_at:
- p += 2 * OFFSET_ADDRESS_SIZE;
- continue;
-
-
- case start_memory:
- case stop_memory:
- p += 2;
- continue;
-
-
- default:
- abort (); /* We have listed all the cases. */
- } /* switch *p++ */
-
- /* Getting here means we have found the possible starting
- characters for one path of the pattern -- and that the empty
- string does not match. We need not follow this path further.
- Instead, look at the next alternative (remembered on the
- stack), or quit if no more. The test at the top of the loop
- does these things. */
- path_can_be_null = false;
- p = pend;
- } /* while p */
-
- /* Set `can_be_null' for the last path (also the first path, if the
- pattern is empty). */
- bufp->can_be_null |= path_can_be_null;
-
- done:
- RESET_FAIL_STACK ();
- return 0;
-}
-
-#else /* not INSIDE_RECURSION */
-
-int
-re_compile_fastmap (struct re_pattern_buffer *bufp)
-{
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- return wcs_re_compile_fastmap(bufp);
- else
-# endif
- return byte_re_compile_fastmap(bufp);
-} /* re_compile_fastmap */
-#ifdef _LIBC
-weak_alias (__re_compile_fastmap, re_compile_fastmap)
-#endif
-\f
-
-/* Set REGS to hold NUM_REGS registers, storing them in STARTS and
- ENDS. Subsequent matches using PATTERN_BUFFER and REGS will use
- this memory for recording register information. STARTS and ENDS
- must be allocated using the malloc library routine, and must each
- be at least NUM_REGS * sizeof (regoff_t) bytes long.
-
- If NUM_REGS == 0, then subsequent matches should allocate their own
- register data.
-
- Unless this function is called, the first search or match using
- PATTERN_BUFFER will allocate its own register data, without
- freeing the old data. */
-
-void
-re_set_registers (struct re_pattern_buffer *bufp,
- struct re_registers *regs,
- unsigned int num_regs,
- regoff_t *starts, regoff_t *ends)
-{
- if (num_regs)
- {
- bufp->regs_allocated = REGS_REALLOCATE;
- regs->num_regs = num_regs;
- regs->start = starts;
- regs->end = ends;
- }
- else
- {
- bufp->regs_allocated = REGS_UNALLOCATED;
- regs->num_regs = 0;
- regs->start = regs->end = (regoff_t *) 0;
- }
-}
-#ifdef _LIBC
-weak_alias (__re_set_registers, re_set_registers)
-#endif
-\f
-/* Searching routines. */
-
-/* Like re_search_2, below, but only one string is specified, and
- doesn't let you say where to stop matching. */
-
-int
-re_search (struct re_pattern_buffer *bufp,
- const char *string,
- int size, int startpos, int range,
- struct re_registers *regs)
-{
- return re_search_2 (bufp, NULL, 0, string, size, startpos, range,
- regs, size);
-}
-#ifdef _LIBC
-weak_alias (__re_search, re_search)
-#endif
-
-
-/* Using the compiled pattern in BUFP->buffer, first tries to match the
- virtual concatenation of STRING1 and STRING2, starting first at index
- STARTPOS, then at STARTPOS + 1, and so on.
-
- STRING1 and STRING2 have length SIZE1 and SIZE2, respectively.
-
- RANGE is how far to scan while trying to match. RANGE = 0 means try
- only at STARTPOS; in general, the last start tried is STARTPOS +
- RANGE.
-
- In REGS, return the indices of the virtual concatenation of STRING1
- and STRING2 that matched the entire BUFP->buffer and its contained
- subexpressions.
-
- Do not consider matching one past the index STOP in the virtual
- concatenation of STRING1 and STRING2.
-
- We return either the position in the strings at which the match was
- found, -1 if no match, or -2 if error (such as failure
- stack overflow). */
-
-int
-re_search_2 (struct re_pattern_buffer *bufp,
- const char *string1, int size1,
- const char *string2, int size2,
- int startpos, int range,
- struct re_registers *regs,
- int stop)
-{
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- return wcs_re_search_2 (bufp, string1, size1, string2, size2, startpos,
- range, regs, stop);
- else
-# endif
- return byte_re_search_2 (bufp, string1, size1, string2, size2, startpos,
- range, regs, stop);
-} /* re_search_2 */
-#ifdef _LIBC
-weak_alias (__re_search_2, re_search_2)
-#endif
-
-#endif /* not INSIDE_RECURSION */
-
-#ifdef INSIDE_RECURSION
-
-#ifdef MATCH_MAY_ALLOCATE
-# define FREE_VAR(var) if (var) REGEX_FREE (var); var = NULL
-#else
-# define FREE_VAR(var) if (var) free (var); var = NULL
-#endif
-
-#ifdef WCHAR
-# define MAX_ALLOCA_SIZE 2000
-
-# define FREE_WCS_BUFFERS() \
- do { \
- if (size1 > MAX_ALLOCA_SIZE) \
- { \
- free (wcs_string1); \
- free (mbs_offset1); \
- } \
- else \
- { \
- FREE_VAR (wcs_string1); \
- FREE_VAR (mbs_offset1); \
- } \
- if (size2 > MAX_ALLOCA_SIZE) \
- { \
- free (wcs_string2); \
- free (mbs_offset2); \
- } \
- else \
- { \
- FREE_VAR (wcs_string2); \
- FREE_VAR (mbs_offset2); \
- } \
- } while (0)
-
-#endif
-
-
-static int
-PREFIX(re_search_2) (struct re_pattern_buffer *bufp,
- const char *string1, int size1,
- const char *string2, int size2,
- int startpos, int range,
- struct re_registers *regs,
- int stop)
-{
- int val;
- register char *fastmap = bufp->fastmap;
- register RE_TRANSLATE_TYPE translate = bufp->translate;
- int total_size = size1 + size2;
- int endpos = startpos + range;
-#ifdef WCHAR
- /* We need wchar_t* buffers correspond to cstring1, cstring2. */
- wchar_t *wcs_string1 = NULL, *wcs_string2 = NULL;
- /* We need the size of wchar_t buffers correspond to csize1, csize2. */
- int wcs_size1 = 0, wcs_size2 = 0;
- /* offset buffer for optimizatoin. See convert_mbs_to_wc. */
- int *mbs_offset1 = NULL, *mbs_offset2 = NULL;
- /* They hold whether each wchar_t is binary data or not. */
- char *is_binary = NULL;
-#endif /* WCHAR */
-
- /* Check for out-of-range STARTPOS. */
- if (startpos < 0 || startpos > total_size)
- return -1;
-
- /* Fix up RANGE if it might eventually take us outside
- the virtual concatenation of STRING1 and STRING2.
- Make sure we won't move STARTPOS below 0 or above TOTAL_SIZE. */
- if (endpos < 0)
- range = 0 - startpos;
- else if (endpos > total_size)
- range = total_size - startpos;
-
- /* If the search isn't to be a backwards one, don't waste time in a
- search for a pattern that must be anchored. */
- if (bufp->used > 0 && range > 0
- && ((re_opcode_t) bufp->buffer[0] == begbuf
- /* `begline' is like `begbuf' if it cannot match at newlines. */
- || ((re_opcode_t) bufp->buffer[0] == begline
- && !bufp->newline_anchor)))
- {
- if (startpos > 0)
- return -1;
- else
- range = 1;
- }
-
-#ifdef emacs
- /* In a forward search for something that starts with \=.
- don't keep searching past point. */
- if (bufp->used > 0 && (re_opcode_t) bufp->buffer[0] == at_dot && range > 0)
- {
- range = PT - startpos;
- if (range <= 0)
- return -1;
- }
-#endif /* emacs */
-
- /* Update the fastmap now if not correct already. */
- if (fastmap && !bufp->fastmap_accurate)
- if (re_compile_fastmap (bufp) == -2)
- return -2;
-
-#ifdef WCHAR
- /* Allocate wchar_t array for wcs_string1 and wcs_string2 and
- fill them with converted string. */
- if (size1 != 0)
- {
- if (size1 > MAX_ALLOCA_SIZE)
- {
- wcs_string1 = TALLOC (size1 + 1, CHAR_T);
- mbs_offset1 = TALLOC (size1 + 1, int);
- is_binary = TALLOC (size1 + 1, char);
- }
- else
- {
- wcs_string1 = REGEX_TALLOC (size1 + 1, CHAR_T);
- mbs_offset1 = REGEX_TALLOC (size1 + 1, int);
- is_binary = REGEX_TALLOC (size1 + 1, char);
- }
- if (!wcs_string1 || !mbs_offset1 || !is_binary)
- {
- if (size1 > MAX_ALLOCA_SIZE)
- {
- free (wcs_string1);
- free (mbs_offset1);
- free (is_binary);
- }
- else
- {
- FREE_VAR (wcs_string1);
- FREE_VAR (mbs_offset1);
- FREE_VAR (is_binary);
- }
- return -2;
- }
- wcs_size1 = convert_mbs_to_wcs(wcs_string1, string1, size1,
- mbs_offset1, is_binary);
- wcs_string1[wcs_size1] = L'\0'; /* for a sentinel */
- if (size1 > MAX_ALLOCA_SIZE)
- free (is_binary);
- else
- FREE_VAR (is_binary);
- }
- if (size2 != 0)
- {
- if (size2 > MAX_ALLOCA_SIZE)
- {
- wcs_string2 = TALLOC (size2 + 1, CHAR_T);
- mbs_offset2 = TALLOC (size2 + 1, int);
- is_binary = TALLOC (size2 + 1, char);
- }
- else
- {
- wcs_string2 = REGEX_TALLOC (size2 + 1, CHAR_T);
- mbs_offset2 = REGEX_TALLOC (size2 + 1, int);
- is_binary = REGEX_TALLOC (size2 + 1, char);
- }
- if (!wcs_string2 || !mbs_offset2 || !is_binary)
- {
- FREE_WCS_BUFFERS ();
- if (size2 > MAX_ALLOCA_SIZE)
- free (is_binary);
- else
- FREE_VAR (is_binary);
- return -2;
- }
- wcs_size2 = convert_mbs_to_wcs(wcs_string2, string2, size2,
- mbs_offset2, is_binary);
- wcs_string2[wcs_size2] = L'\0'; /* for a sentinel */
- if (size2 > MAX_ALLOCA_SIZE)
- free (is_binary);
- else
- FREE_VAR (is_binary);
- }
-#endif /* WCHAR */
-
-
- /* Loop through the string, looking for a place to start matching. */
- for (;;)
- {
- /* If a fastmap is supplied, skip quickly over characters that
- cannot be the start of a match. If the pattern can match the
- null string, however, we don't need to skip characters; we want
- the first null string. */
- if (fastmap && startpos < total_size && !bufp->can_be_null)
- {
- if (range > 0) /* Searching forwards. */
- {
- register const char *d;
- register int lim = 0;
- int irange = range;
-
- if (startpos < size1 && startpos + range >= size1)
- lim = range - (size1 - startpos);
-
- d = (startpos >= size1 ? string2 - size1 : string1) + startpos;
-
- /* Written out as an if-else to avoid testing `translate'
- inside the loop. */
- if (translate)
- while (range > lim
- && !fastmap[(unsigned char)
- translate[(unsigned char) *d++]])
- range--;
- else
- while (range > lim && !fastmap[(unsigned char) *d++])
- range--;
-
- startpos += irange - range;
- }
- else /* Searching backwards. */
- {
- register CHAR_T c = (size1 == 0 || startpos >= size1
- ? string2[startpos - size1]
- : string1[startpos]);
-
- if (!fastmap[(unsigned char) TRANSLATE (c)])
- goto advance;
- }
- }
-
- /* If can't match the null string, and that's all we have left, fail. */
- if (range >= 0 && startpos == total_size && fastmap
- && !bufp->can_be_null)
- {
-#ifdef WCHAR
- FREE_WCS_BUFFERS ();
-#endif
- return -1;
- }
-
-#ifdef WCHAR
- val = wcs_re_match_2_internal (bufp, string1, size1, string2,
- size2, startpos, regs, stop,
- wcs_string1, wcs_size1,
- wcs_string2, wcs_size2,
- mbs_offset1, mbs_offset2);
-#else /* BYTE */
- val = byte_re_match_2_internal (bufp, string1, size1, string2,
- size2, startpos, regs, stop);
-#endif /* BYTE */
-
-#ifndef REGEX_MALLOC
-# ifdef C_ALLOCA
- alloca (0);
-# endif
-#endif
-
- if (val >= 0)
- {
-#ifdef WCHAR
- FREE_WCS_BUFFERS ();
-#endif
- return startpos;
- }
-
- if (val == -2)
- {
-#ifdef WCHAR
- FREE_WCS_BUFFERS ();
-#endif
- return -2;
- }
-
- advance:
- if (!range)
- break;
- else if (range > 0)
- {
- range--;
- startpos++;
- }
- else
- {
- range++;
- startpos--;
- }
- }
-#ifdef WCHAR
- FREE_WCS_BUFFERS ();
-#endif
- return -1;
-}
-
-#ifdef WCHAR
-/* This converts PTR, a pointer into one of the search wchar_t strings
- `string1' and `string2' into an multibyte string offset from the
- beginning of that string. We use mbs_offset to optimize.
- See convert_mbs_to_wcs. */
-# define POINTER_TO_OFFSET(ptr) \
- (FIRST_STRING_P (ptr) \
- ? ((regoff_t)(mbs_offset1 != NULL? mbs_offset1[(ptr)-string1] : 0)) \
- : ((regoff_t)((mbs_offset2 != NULL? mbs_offset2[(ptr)-string2] : 0) \
- + csize1)))
-#else /* BYTE */
-/* This converts PTR, a pointer into one of the search strings `string1'
- and `string2' into an offset from the beginning of that string. */
-# define POINTER_TO_OFFSET(ptr) \
- (FIRST_STRING_P (ptr) \
- ? ((regoff_t) ((ptr) - string1)) \
- : ((regoff_t) ((ptr) - string2 + size1)))
-#endif /* WCHAR */
-
-/* Macros for dealing with the split strings in re_match_2. */
-
-#define MATCHING_IN_FIRST_STRING (dend == end_match_1)
-
-/* Call before fetching a character with *d. This switches over to
- string2 if necessary. */
-#define PREFETCH() \
- while (d == dend) \
- { \
- /* End of string2 => fail. */ \
- if (dend == end_match_2) \
- goto fail; \
- /* End of string1 => advance to string2. */ \
- d = string2; \
- dend = end_match_2; \
- }
-
-/* Test if at very beginning or at very end of the virtual concatenation
- of `string1' and `string2'. If only one string, it's `string2'. */
-#define AT_STRINGS_BEG(d) ((d) == (size1 ? string1 : string2) || !size2)
-#define AT_STRINGS_END(d) ((d) == end2)
-
-
-/* Test if D points to a character which is word-constituent. We have
- two special cases to check for: if past the end of string1, look at
- the first character in string2; and if before the beginning of
- string2, look at the last character in string1. */
-#ifdef WCHAR
-/* Use internationalized API instead of SYNTAX. */
-# define WORDCHAR_P(d) \
- (iswalnum ((wint_t)((d) == end1 ? *string2 \
- : (d) == string2 - 1 ? *(end1 - 1) : *(d))) != 0 \
- || ((d) == end1 ? *string2 \
- : (d) == string2 - 1 ? *(end1 - 1) : *(d)) == L'_')
-#else /* BYTE */
-# define WORDCHAR_P(d) \
- (SYNTAX ((d) == end1 ? *string2 \
- : (d) == string2 - 1 ? *(end1 - 1) : *(d)) \
- == Sword)
-#endif /* WCHAR */
-
-/* Disabled due to a compiler bug -- see comment at case wordbound */
-#if 0
-/* Test if the character before D and the one at D differ with respect
- to being word-constituent. */
-#define AT_WORD_BOUNDARY(d) \
- (AT_STRINGS_BEG (d) || AT_STRINGS_END (d) \
- || WORDCHAR_P (d - 1) != WORDCHAR_P (d))
-#endif
-
-/* Free everything we malloc. */
-#ifdef MATCH_MAY_ALLOCATE
-# ifdef WCHAR
-# define FREE_VARIABLES() \
- do { \
- REGEX_FREE_STACK (fail_stack.stack); \
- FREE_VAR (regstart); \
- FREE_VAR (regend); \
- FREE_VAR (old_regstart); \
- FREE_VAR (old_regend); \
- FREE_VAR (best_regstart); \
- FREE_VAR (best_regend); \
- FREE_VAR (reg_info); \
- FREE_VAR (reg_dummy); \
- FREE_VAR (reg_info_dummy); \
- if (!cant_free_wcs_buf) \
- { \
- FREE_VAR (string1); \
- FREE_VAR (string2); \
- FREE_VAR (mbs_offset1); \
- FREE_VAR (mbs_offset2); \
- } \
- } while (0)
-# else /* BYTE */
-# define FREE_VARIABLES() \
- do { \
- REGEX_FREE_STACK (fail_stack.stack); \
- FREE_VAR (regstart); \
- FREE_VAR (regend); \
- FREE_VAR (old_regstart); \
- FREE_VAR (old_regend); \
- FREE_VAR (best_regstart); \
- FREE_VAR (best_regend); \
- FREE_VAR (reg_info); \
- FREE_VAR (reg_dummy); \
- FREE_VAR (reg_info_dummy); \
- } while (0)
-# endif /* WCHAR */
-#else
-# ifdef WCHAR
-# define FREE_VARIABLES() \
- do { \
- if (!cant_free_wcs_buf) \
- { \
- FREE_VAR (string1); \
- FREE_VAR (string2); \
- FREE_VAR (mbs_offset1); \
- FREE_VAR (mbs_offset2); \
- } \
- } while (0)
-# else /* BYTE */
-# define FREE_VARIABLES() ((void)0) /* Do nothing! But inhibit gcc warning. */
-# endif /* WCHAR */
-#endif /* not MATCH_MAY_ALLOCATE */
-
-/* These values must meet several constraints. They must not be valid
- register values; since we have a limit of 255 registers (because
- we use only one byte in the pattern for the register number), we can
- use numbers larger than 255. They must differ by 1, because of
- NUM_FAILURE_ITEMS above. And the value for the lowest register must
- be larger than the value for the highest register, so we do not try
- to actually save any registers when none are active. */
-#define NO_HIGHEST_ACTIVE_REG (1 << BYTEWIDTH)
-#define NO_LOWEST_ACTIVE_REG (NO_HIGHEST_ACTIVE_REG + 1)
-\f
-#else /* not INSIDE_RECURSION */
-/* Matching routines. */
-
-#ifndef emacs /* Emacs never uses this. */
-/* re_match is like re_match_2 except it takes only a single string. */
-
-int
-re_match (struct re_pattern_buffer *bufp,
- const char *string,
- int size, int pos,
- struct re_registers *regs)
-{
- int result;
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- result = wcs_re_match_2_internal (bufp, NULL, 0, string, size,
- pos, regs, size,
- NULL, 0, NULL, 0, NULL, NULL);
- else
-# endif
- result = byte_re_match_2_internal (bufp, NULL, 0, string, size,
- pos, regs, size);
-# ifndef REGEX_MALLOC
-# ifdef C_ALLOCA
- alloca (0);
-# endif
-# endif
- return result;
-}
-# ifdef _LIBC
-weak_alias (__re_match, re_match)
-# endif
-#endif /* not emacs */
-
-#endif /* not INSIDE_RECURSION */
-
-#ifdef INSIDE_RECURSION
-static boolean PREFIX(group_match_null_string_p) (UCHAR_T **p,
- UCHAR_T *end,
- PREFIX(register_info_type) *reg_info);
-static boolean PREFIX(alt_match_null_string_p) (UCHAR_T *p,
- UCHAR_T *end,
- PREFIX(register_info_type) *reg_info);
-static boolean PREFIX(common_op_match_null_string_p) (UCHAR_T **p,
- UCHAR_T *end,
- PREFIX(register_info_type) *reg_info);
-static int PREFIX(bcmp_translate) (const CHAR_T *s1, const CHAR_T *s2,
- int len, char *translate);
-#else /* not INSIDE_RECURSION */
-
-/* re_match_2 matches the compiled pattern in BUFP against the
- the (virtual) concatenation of STRING1 and STRING2 (of length SIZE1
- and SIZE2, respectively). We start matching at POS, and stop
- matching at STOP.
-
- If REGS is non-null and the `no_sub' field of BUFP is nonzero, we
- store offsets for the substring each group matched in REGS. See the
- documentation for exactly how many groups we fill.
-
- We return -1 if no match, -2 if an internal error (such as the
- failure stack overflowing). Otherwise, we return the length of the
- matched substring. */
-
-int
-re_match_2 (struct re_pattern_buffer *bufp,
- const char *string1, int size1,
- const char *string2, int size2,
- int pos, struct re_registers *regs,
- int stop)
-{
- int result;
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- result = wcs_re_match_2_internal (bufp, string1, size1, string2, size2,
- pos, regs, stop,
- NULL, 0, NULL, 0, NULL, NULL);
- else
-# endif
- result = byte_re_match_2_internal (bufp, string1, size1, string2, size2,
- pos, regs, stop);
-
-#ifndef REGEX_MALLOC
-# ifdef C_ALLOCA
- alloca (0);
-# endif
-#endif
- return result;
-}
-#ifdef _LIBC
-weak_alias (__re_match_2, re_match_2)
-#endif
-
-#endif /* not INSIDE_RECURSION */
-
-#ifdef INSIDE_RECURSION
-
-#ifdef WCHAR
-
-/* This check the substring (from 0, to length) of the multibyte string,
- to which offset_buffer correspond. And count how many wchar_t_characters
- the substring occupy. We use offset_buffer to optimization.
- See convert_mbs_to_wcs. */
-
-static int
-count_mbs_length (int *offset_buffer, int length)
-{
- int upper, lower;
-
- /* Check whether the size is valid. */
- if (length < 0)
- return -1;
-
- if (offset_buffer == NULL)
- return 0;
-
- /* If there are no multibyte character, offset_buffer[i] == i.
- Optmize for this case. */
- if (offset_buffer[length] == length)
- return length;
-
- /* Set up upper with length. (because for all i, offset_buffer[i] >= i) */
- upper = length;
- lower = 0;
-
- while (true)
- {
- int middle = (lower + upper) / 2;
- if (middle == lower || middle == upper)
- break;
- if (offset_buffer[middle] > length)
- upper = middle;
- else if (offset_buffer[middle] < length)
- lower = middle;
- else
- return middle;
- }
-
- return -1;
-}
-#endif /* WCHAR */
-
-/* This is a separate function so that we can force an alloca cleanup
- afterwards. */
-#ifdef WCHAR
-static int
-wcs_re_match_2_internal (struct re_pattern_buffer *bufp,
- const char *cstring1, int csize1,
- const char *cstring2, int csize2,
- int pos,
- struct re_registers *regs,
- int stop,
- /* string1 == string2 == NULL means
- string1/2, size1/2 and mbs_offset1/2 need
- setting up in this function. */
- /* We need wchar_t * buffers corresponding to
- cstring1, cstring2. */
- wchar_t *string1, int size1,
- wchar_t *string2, int size2,
- /* Offset buffer for optimization. See
- convert_mbs_to_wc. */
- int *mbs_offset1,
- int *mbs_offset2)
-#else /* BYTE */
-static int
-byte_re_match_2_internal (struct re_pattern_buffer *bufp,
- const char *string1, int size1,
- const char *string2, int size2,
- int pos,
- struct re_registers *regs,
- int stop)
-#endif /* BYTE */
-{
- /* General temporaries. */
- int mcnt;
- UCHAR_T *p1;
-#ifdef WCHAR
- /* They hold whether each wchar_t is binary data or not. */
- char *is_binary = NULL;
- /* If true, we can't free string1/2, mbs_offset1/2. */
- int cant_free_wcs_buf = 1;
-#endif /* WCHAR */
-
- /* Just past the end of the corresponding string. */
- const CHAR_T *end1, *end2;
-
- /* Pointers into string1 and string2, just past the last characters in
- each to consider matching. */
- const CHAR_T *end_match_1, *end_match_2;
-
- /* Where we are in the data, and the end of the current string. */
- const CHAR_T *d, *dend;
-
- /* Where we are in the pattern, and the end of the pattern. */
-#ifdef WCHAR
- UCHAR_T *pattern, *p;
- register UCHAR_T *pend;
-#else /* BYTE */
- UCHAR_T *p = bufp->buffer;
- register UCHAR_T *pend = p + bufp->used;
-#endif /* WCHAR */
-
- /* Mark the opcode just after a start_memory, so we can test for an
- empty subpattern when we get to the stop_memory. */
- UCHAR_T *just_past_start_mem = 0;
-
- /* We use this to map every character in the string. */
- RE_TRANSLATE_TYPE translate = bufp->translate;
-
- /* Failure point stack. Each place that can handle a failure further
- down the line pushes a failure point on this stack. It consists of
- restart, regend, and reg_info for all registers corresponding to
- the subexpressions we're currently inside, plus the number of such
- registers, and, finally, two char *'s. The first char * is where
- to resume scanning the pattern; the second one is where to resume
- scanning the strings. If the latter is zero, the failure point is
- a ``dummy''; if a failure happens and the failure point is a dummy,
- it gets discarded and the next next one is tried. */
-#ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */
- PREFIX(fail_stack_type) fail_stack;
-#endif
-#ifdef DEBUG
- static unsigned failure_id;
- unsigned nfailure_points_pushed = 0, nfailure_points_popped = 0;
-#endif
-
-#ifdef REL_ALLOC
- /* This holds the pointer to the failure stack, when
- it is allocated relocatably. */
- fail_stack_elt_t *failure_stack_ptr;
-#endif
-
- /* We fill all the registers internally, independent of what we
- return, for use in backreferences. The number here includes
- an element for register zero. */
- size_t num_regs = bufp->re_nsub + 1;
-
- /* The currently active registers. */
- active_reg_t lowest_active_reg = NO_LOWEST_ACTIVE_REG;
- active_reg_t highest_active_reg = NO_HIGHEST_ACTIVE_REG;
-
- /* Information on the contents of registers. These are pointers into
- the input strings; they record just what was matched (on this
- attempt) by a subexpression part of the pattern, that is, the
- regnum-th regstart pointer points to where in the pattern we began
- matching and the regnum-th regend points to right after where we
- stopped matching the regnum-th subexpression. (The zeroth register
- keeps track of what the whole pattern matches.) */
-#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
- const CHAR_T **regstart, **regend;
-#endif
-
- /* If a group that's operated upon by a repetition operator fails to
- match anything, then the register for its start will need to be
- restored because it will have been set to wherever in the string we
- are when we last see its open-group operator. Similarly for a
- register's end. */
-#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
- const CHAR_T **old_regstart, **old_regend;
-#endif
-
- /* The is_active field of reg_info helps us keep track of which (possibly
- nested) subexpressions we are currently in. The matched_something
- field of reg_info[reg_num] helps us tell whether or not we have
- matched any of the pattern so far this time through the reg_num-th
- subexpression. These two fields get reset each time through any
- loop their register is in. */
-#ifdef MATCH_MAY_ALLOCATE /* otherwise, this is global. */
- PREFIX(register_info_type) *reg_info;
-#endif
-
- /* The following record the register info as found in the above
- variables when we find a match better than any we've seen before.
- This happens as we backtrack through the failure points, which in
- turn happens only if we have not yet matched the entire string. */
- unsigned best_regs_set = false;
-#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
- const CHAR_T **best_regstart, **best_regend;
-#endif
-
- /* Logically, this is `best_regend[0]'. But we don't want to have to
- allocate space for that if we're not allocating space for anything
- else (see below). Also, we never need info about register 0 for
- any of the other register vectors, and it seems rather a kludge to
- treat `best_regend' differently than the rest. So we keep track of
- the end of the best match so far in a separate variable. We
- initialize this to NULL so that when we backtrack the first time
- and need to test it, it's not garbage. */
- const CHAR_T *match_end = NULL;
-
- /* This helps SET_REGS_MATCHED avoid doing redundant work. */
- int set_regs_matched_done = 0;
-
- /* Used when we pop values we don't care about. */
-#ifdef MATCH_MAY_ALLOCATE /* otherwise, these are global. */
- const CHAR_T **reg_dummy;
- PREFIX(register_info_type) *reg_info_dummy;
-#endif
-
-#ifdef DEBUG
- /* Counts the total number of registers pushed. */
- unsigned num_regs_pushed = 0;
-#endif
-
- /* Definitions for state transitions. More efficiently for gcc. */
-#ifdef __GNUC__
-# if defined HAVE_SUBTRACT_LOCAL_LABELS && defined SHARED
-# define NEXT \
- do \
- { \
- int offset; \
- const void *__unbounded ptr; \
- offset = (p == pend \
- ? 0 : jmptable[SWITCH_ENUM_CAST ((re_opcode_t) *p++)]); \
- ptr = &&end_of_pattern + offset; \
- goto *ptr; \
- } \
- while (0)
-# define REF(x) \
- &&label_##x - &&end_of_pattern
-# define JUMP_TABLE_TYPE const int
-# else
-# define NEXT \
- do \
- { \
- const void *__unbounded ptr; \
- ptr = (p == pend ? &&end_of_pattern \
- : jmptable[SWITCH_ENUM_CAST ((re_opcode_t) *p++)]); \
- goto *ptr; \
- } \
- while (0)
-# define REF(x) \
- &&label_##x
-# define JUMP_TABLE_TYPE const void *const
-# endif
-# define CASE(x) label_##x
- static JUMP_TABLE_TYPE jmptable[] =
- {
- REF (no_op),
- REF (succeed),
- REF (exactn),
-# ifdef MBS_SUPPORT
- REF (exactn_bin),
-# endif
- REF (anychar),
- REF (charset),
- REF (charset_not),
- REF (start_memory),
- REF (stop_memory),
- REF (duplicate),
- REF (begline),
- REF (endline),
- REF (begbuf),
- REF (endbuf),
- REF (jump),
- REF (jump_past_alt),
- REF (on_failure_jump),
- REF (on_failure_keep_string_jump),
- REF (pop_failure_jump),
- REF (maybe_pop_jump),
- REF (dummy_failure_jump),
- REF (push_dummy_failure),
- REF (succeed_n),
- REF (jump_n),
- REF (set_number_at),
- REF (wordchar),
- REF (notwordchar),
- REF (wordbeg),
- REF (wordend),
- REF (wordbound),
- REF (notwordbound)
-# ifdef emacs
- ,REF (before_dot),
- REF (at_dot),
- REF (after_dot),
- REF (syntaxspec),
- REF (notsyntaxspec)
-# endif
- };
-#else
-# define NEXT \
- break
-# define CASE(x) \
- case x
-#endif
-
- DEBUG_PRINT1 ("\n\nEntering re_match_2.\n");
-
- INIT_FAIL_STACK ();
-
-#ifdef MATCH_MAY_ALLOCATE
- /* Do not bother to initialize all the register variables if there are
- no groups in the pattern, as it takes a fair amount of time. If
- there are groups, we include space for register 0 (the whole
- pattern), even though we never use it, since it simplifies the
- array indexing. We should fix this. */
- if (bufp->re_nsub)
- {
- regstart = REGEX_TALLOC (num_regs, const CHAR_T *);
- regend = REGEX_TALLOC (num_regs, const CHAR_T *);
- old_regstart = REGEX_TALLOC (num_regs, const CHAR_T *);
- old_regend = REGEX_TALLOC (num_regs, const CHAR_T *);
- best_regstart = REGEX_TALLOC (num_regs, const CHAR_T *);
- best_regend = REGEX_TALLOC (num_regs, const CHAR_T *);
- reg_info = REGEX_TALLOC (num_regs, PREFIX(register_info_type));
- reg_dummy = REGEX_TALLOC (num_regs, const CHAR_T *);
- reg_info_dummy = REGEX_TALLOC (num_regs, PREFIX(register_info_type));
-
- if (!(regstart && regend && old_regstart && old_regend && reg_info
- && best_regstart && best_regend && reg_dummy && reg_info_dummy))
- {
- FREE_VARIABLES ();
- return -2;
- }
- }
- else
- {
- /* We must initialize all our variables to NULL, so that
- `FREE_VARIABLES' doesn't try to free them. */
- regstart = regend = old_regstart = old_regend = best_regstart
- = best_regend = reg_dummy = NULL;
- reg_info = reg_info_dummy = (PREFIX(register_info_type) *) NULL;
- }
-#endif /* MATCH_MAY_ALLOCATE */
-
- /* The starting position is bogus. */
-#ifdef WCHAR
- if (pos < 0 || pos > csize1 + csize2)
-#else /* BYTE */
- if (pos < 0 || pos > size1 + size2)
-#endif
- {
- FREE_VARIABLES ();
- return -1;
- }
-
-#ifdef WCHAR
- /* Allocate wchar_t array for string1 and string2 and
- fill them with converted string. */
- if (string1 == NULL && string2 == NULL)
- {
- /* We need seting up buffers here. */
-
- /* We must free wcs buffers in this function. */
- cant_free_wcs_buf = 0;
-
- if (csize1 != 0)
- {
- string1 = REGEX_TALLOC (csize1 + 1, CHAR_T);
- mbs_offset1 = REGEX_TALLOC (csize1 + 1, int);
- is_binary = REGEX_TALLOC (csize1 + 1, char);
- if (!string1 || !mbs_offset1 || !is_binary)
- {
- FREE_VAR (string1);
- FREE_VAR (mbs_offset1);
- FREE_VAR (is_binary);
- return -2;
- }
- }
- if (csize2 != 0)
- {
- string2 = REGEX_TALLOC (csize2 + 1, CHAR_T);
- mbs_offset2 = REGEX_TALLOC (csize2 + 1, int);
- is_binary = REGEX_TALLOC (csize2 + 1, char);
- if (!string2 || !mbs_offset2 || !is_binary)
- {
- FREE_VAR (string1);
- FREE_VAR (mbs_offset1);
- FREE_VAR (string2);
- FREE_VAR (mbs_offset2);
- FREE_VAR (is_binary);
- return -2;
- }
- size2 = convert_mbs_to_wcs(string2, cstring2, csize2,
- mbs_offset2, is_binary);
- string2[size2] = L'\0'; /* for a sentinel */
- FREE_VAR (is_binary);
- }
- }
-
- /* We need to cast pattern to (wchar_t*), because we casted this compiled
- pattern to (char*) in regex_compile. */
- p = pattern = (CHAR_T*)bufp->buffer;
- pend = (CHAR_T*)(bufp->buffer + bufp->used);
-
-#endif /* WCHAR */
-
- /* Initialize subexpression text positions to -1 to mark ones that no
- start_memory/stop_memory has been seen for. Also initialize the
- register information struct. */
- for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++)
- {
- regstart[mcnt] = regend[mcnt]
- = old_regstart[mcnt] = old_regend[mcnt] = REG_UNSET_VALUE;
-
- REG_MATCH_NULL_STRING_P (reg_info[mcnt]) = MATCH_NULL_UNSET_VALUE;
- IS_ACTIVE (reg_info[mcnt]) = 0;
- MATCHED_SOMETHING (reg_info[mcnt]) = 0;
- EVER_MATCHED_SOMETHING (reg_info[mcnt]) = 0;
- }
-
- /* We move `string1' into `string2' if the latter's empty -- but not if
- `string1' is null. */
- if (size2 == 0 && string1 != NULL)
- {
- string2 = string1;
- size2 = size1;
- string1 = 0;
- size1 = 0;
-#ifdef WCHAR
- mbs_offset2 = mbs_offset1;
- csize2 = csize1;
- mbs_offset1 = NULL;
- csize1 = 0;
-#endif
- }
- end1 = string1 + size1;
- end2 = string2 + size2;
-
- /* Compute where to stop matching, within the two strings. */
-#ifdef WCHAR
- if (stop <= csize1)
- {
- mcnt = count_mbs_length(mbs_offset1, stop);
- end_match_1 = string1 + mcnt;
- end_match_2 = string2;
- }
- else
- {
- if (stop > csize1 + csize2)
- stop = csize1 + csize2;
- end_match_1 = end1;
- mcnt = count_mbs_length(mbs_offset2, stop-csize1);
- end_match_2 = string2 + mcnt;
- }
- if (mcnt < 0)
- { /* count_mbs_length return error. */
- FREE_VARIABLES ();
- return -1;
- }
-#else
- if (stop <= size1)
- {
- end_match_1 = string1 + stop;
- end_match_2 = string2;
- }
- else
- {
- end_match_1 = end1;
- end_match_2 = string2 + stop - size1;
- }
-#endif /* WCHAR */
-
- /* `p' scans through the pattern as `d' scans through the data.
- `dend' is the end of the input string that `d' points within. `d'
- is advanced into the following input string whenever necessary, but
- this happens before fetching; therefore, at the beginning of the
- loop, `d' can be pointing at the end of a string, but it cannot
- equal `string2'. */
-#ifdef WCHAR
- if (size1 > 0 && pos <= csize1)
- {
- mcnt = count_mbs_length(mbs_offset1, pos);
- d = string1 + mcnt;
- dend = end_match_1;
- }
- else
- {
- mcnt = count_mbs_length(mbs_offset2, pos-csize1);
- d = string2 + mcnt;
- dend = end_match_2;
- }
-
- if (mcnt < 0)
- { /* count_mbs_length return error. */
- FREE_VARIABLES ();
- return -1;
- }
-#else
- if (size1 > 0 && pos <= size1)
- {
- d = string1 + pos;
- dend = end_match_1;
- }
- else
- {
- d = string2 + pos - size1;
- dend = end_match_2;
- }
-#endif /* WCHAR */
-
- DEBUG_PRINT1 ("The compiled pattern is:\n");
- DEBUG_PRINT_COMPILED_PATTERN (bufp, p, pend);
- DEBUG_PRINT1 ("The string to match is: `");
- DEBUG_PRINT_DOUBLE_STRING (d, string1, size1, string2, size2);
- DEBUG_PRINT1 ("'\n");
-
- /* This loops over pattern commands. It exits by returning from the
- function if the match is complete, or it drops through if the match
- fails at this starting point in the input data. */
- for (;;)
- {
-#ifdef _LIBC
- DEBUG_PRINT2 ("\n%p: ", p);
-#else
- DEBUG_PRINT2 ("\n0x%x: ", p);
-#endif
-
-#ifdef __GNUC__
- NEXT;
-#else
- if (p == pend)
-#endif
- {
-#ifdef __GNUC__
- end_of_pattern:
-#endif
- /* End of pattern means we might have succeeded. */
- DEBUG_PRINT1 ("end of pattern ... ");
-
- /* If we haven't matched the entire string, and we want the
- longest match, try backtracking. */
- if (d != end_match_2)
- {
- /* 1 if this match is the best seen so far. */
- boolean best_match_p;
-
- {
- /* 1 if this match ends in the same string (string1 or string2)
- as the best previous match. */
- boolean same_str_p = (FIRST_STRING_P (match_end)
- == MATCHING_IN_FIRST_STRING);
-
- /* AIX compiler got confused when this was combined
- with the previous declaration. */
- if (same_str_p)
- best_match_p = d > match_end;
- else
- best_match_p = !MATCHING_IN_FIRST_STRING;
- }
-
- DEBUG_PRINT1 ("backtracking.\n");
-
- if (!FAIL_STACK_EMPTY ())
- { /* More failure points to try. */
-
- /* If exceeds best match so far, save it. */
- if (!best_regs_set || best_match_p)
- {
- best_regs_set = true;
- match_end = d;
-
- DEBUG_PRINT1 ("\nSAVING match as best so far.\n");
-
- for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++)
- {
- best_regstart[mcnt] = regstart[mcnt];
- best_regend[mcnt] = regend[mcnt];
- }
- }
- goto fail;
- }
-
- /* If no failure points, don't restore garbage. And if
- last match is real best match, don't restore second
- best one. */
- else if (best_regs_set && !best_match_p)
- {
- restore_best_regs:
- /* Restore best match. It may happen that `dend ==
- end_match_1' while the restored d is in string2.
- For example, the pattern `x.*y.*z' against the
- strings `x-' and `y-z-', if the two strings are
- not consecutive in memory. */
- DEBUG_PRINT1 ("Restoring best registers.\n");
-
- d = match_end;
- dend = ((d >= string1 && d <= end1)
- ? end_match_1 : end_match_2);
-
- for (mcnt = 1; (unsigned) mcnt < num_regs; mcnt++)
- {
- regstart[mcnt] = best_regstart[mcnt];
- regend[mcnt] = best_regend[mcnt];
- }
- }
- } /* d != end_match_2 */
-
- succeed_label:
- DEBUG_PRINT1 ("Accepting match.\n");
- /* If caller wants register contents data back, do it. */
- if (regs && !bufp->no_sub)
- {
- /* Have the register data arrays been allocated? */
- if (bufp->regs_allocated == REGS_UNALLOCATED)
- { /* No. So allocate them with malloc. We need one
- extra element beyond `num_regs' for the `-1' marker
- GNU code uses. */
- regs->num_regs = MAX (RE_NREGS, num_regs + 1);
- regs->start = TALLOC (regs->num_regs, regoff_t);
- regs->end = TALLOC (regs->num_regs, regoff_t);
- if (regs->start == NULL || regs->end == NULL)
- {
- FREE_VARIABLES ();
- return -2;
- }
- bufp->regs_allocated = REGS_REALLOCATE;
- }
- else if (bufp->regs_allocated == REGS_REALLOCATE)
- { /* Yes. If we need more elements than were already
- allocated, reallocate them. If we need fewer, just
- leave it alone. */
- if (regs->num_regs < num_regs + 1)
- {
- regs->num_regs = num_regs + 1;
- RETALLOC (regs->start, regs->num_regs, regoff_t);
- RETALLOC (regs->end, regs->num_regs, regoff_t);
- if (regs->start == NULL || regs->end == NULL)
- {
- FREE_VARIABLES ();
- return -2;
- }
- }
- }
- else
- {
- /* These braces fend off a "empty body in an else-statement"
- warning under GCC when assert expands to nothing. */
- assert (bufp->regs_allocated == REGS_FIXED);
- }
-
- /* Convert the pointer data in `regstart' and `regend' to
- indices. Register zero has to be set differently,
- since we haven't kept track of any info for it. */
- if (regs->num_regs > 0)
- {
- regs->start[0] = pos;
-#ifdef WCHAR
- if (MATCHING_IN_FIRST_STRING)
- regs->end[0] = (mbs_offset1 != NULL ?
- mbs_offset1[d-string1] : 0);
- else
- regs->end[0] = csize1 + (mbs_offset2 != NULL
- ? mbs_offset2[d-string2] : 0);
-#else
- regs->end[0] = (MATCHING_IN_FIRST_STRING
- ? ((regoff_t) (d - string1))
- : ((regoff_t) (d - string2 + size1)));
-#endif /* WCHAR */
- }
-
- /* Go through the first `min (num_regs, regs->num_regs)'
- registers, since that is all we initialized. */
- for (mcnt = 1; (unsigned) mcnt < MIN (num_regs, regs->num_regs);
- mcnt++)
- {
- if (REG_UNSET (regstart[mcnt]) || REG_UNSET (regend[mcnt]))
- regs->start[mcnt] = regs->end[mcnt] = -1;
- else
- {
- regs->start[mcnt]
- = (regoff_t) POINTER_TO_OFFSET (regstart[mcnt]);
- regs->end[mcnt]
- = (regoff_t) POINTER_TO_OFFSET (regend[mcnt]);
- }
- }
-
- /* If the regs structure we return has more elements than
- were in the pattern, set the extra elements to -1. If
- we (re)allocated the registers, this is the case,
- because we always allocate enough to have at least one
- -1 at the end. */
- for (mcnt = num_regs; (unsigned) mcnt < regs->num_regs; mcnt++)
- regs->start[mcnt] = regs->end[mcnt] = -1;
- } /* regs && !bufp->no_sub */
-
- DEBUG_PRINT4 ("%u failure points pushed, %u popped (%u remain).\n",
- nfailure_points_pushed, nfailure_points_popped,
- nfailure_points_pushed - nfailure_points_popped);
- DEBUG_PRINT2 ("%u registers pushed.\n", num_regs_pushed);
-
-#ifdef WCHAR
- if (MATCHING_IN_FIRST_STRING)
- mcnt = mbs_offset1 != NULL ? mbs_offset1[d-string1] : 0;
- else
- mcnt = (mbs_offset2 != NULL ? mbs_offset2[d-string2] : 0) +
- csize1;
- mcnt -= pos;
-#else
- mcnt = d - pos - (MATCHING_IN_FIRST_STRING
- ? string1 : string2 - size1);
-#endif /* WCHAR */
-
- DEBUG_PRINT2 ("Returning %d from re_match_2.\n", mcnt);
-
- FREE_VARIABLES ();
- return mcnt;
- }
-
-#ifndef __GNUC__
- /* Otherwise match next pattern command. */
- switch (SWITCH_ENUM_CAST ((re_opcode_t) *p++))
- {
-#endif
- /* Ignore these. Used to ignore the n of succeed_n's which
- currently have n == 0. */
- CASE (no_op):
- DEBUG_PRINT1 ("EXECUTING no_op.\n");
- NEXT;
-
- CASE (succeed):
- DEBUG_PRINT1 ("EXECUTING succeed.\n");
- goto succeed_label;
-
- /* Match the next n pattern characters exactly. The following
- byte in the pattern defines n, and the n bytes after that
- are the characters to match. */
- CASE (exactn):
-#ifdef MBS_SUPPORT
- CASE (exactn_bin):
-#endif
- mcnt = *p++;
- DEBUG_PRINT2 ("EXECUTING exactn %d.\n", mcnt);
-
- /* This is written out as an if-else so we don't waste time
- testing `translate' inside the loop. */
- if (translate)
- {
- do
- {
- PREFETCH ();
-#ifdef WCHAR
- if (*d <= 0xff)
- {
- if ((UCHAR_T) translate[(unsigned char) *d++]
- != (UCHAR_T) *p++)
- goto fail;
- }
- else
- {
- if (*d++ != (CHAR_T) *p++)
- goto fail;
- }
-#else
- if ((UCHAR_T) translate[(unsigned char) *d++]
- != (UCHAR_T) *p++)
- goto fail;
-#endif /* WCHAR */
- }
- while (--mcnt);
- }
- else
- {
- do
- {
- PREFETCH ();
- if (*d++ != (CHAR_T) *p++) goto fail;
- }
- while (--mcnt);
- }
- SET_REGS_MATCHED ();
- NEXT;
-
-
- /* Match any character except possibly a newline or a null. */
- CASE (anychar):
- DEBUG_PRINT1 ("EXECUTING anychar.\n");
-
- PREFETCH ();
-
- if ((!(bufp->syntax & RE_DOT_NEWLINE) && TRANSLATE (*d) == '\n')
- || (bufp->syntax & RE_DOT_NOT_NULL && TRANSLATE (*d) == '\000'))
- goto fail;
-
- SET_REGS_MATCHED ();
- DEBUG_PRINT2 (" Matched `%ld'.\n", (long int) *d);
- d++;
- NEXT;
-
-
- CASE (charset):
- CASE (charset_not):
- {
- register UCHAR_T c;
-#ifdef WCHAR
- unsigned int i, char_class_length, coll_symbol_length,
- equiv_class_length, ranges_length, chars_length, length;
- CHAR_T *workp, *workp2, *charset_top;
-#define WORK_BUFFER_SIZE 128
- CHAR_T str_buf[WORK_BUFFER_SIZE];
-# ifdef _LIBC
- uint32_t nrules;
-# endif /* _LIBC */
-#endif /* WCHAR */
- boolean negate = (re_opcode_t) *(p - 1) == charset_not;
-
- DEBUG_PRINT2 ("EXECUTING charset%s.\n", negate ? "_not" : "");
- PREFETCH ();
- c = TRANSLATE (*d); /* The character to match. */
-#ifdef WCHAR
-# ifdef _LIBC
- nrules = _NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES);
-# endif /* _LIBC */
- charset_top = p - 1;
- char_class_length = *p++;
- coll_symbol_length = *p++;
- equiv_class_length = *p++;
- ranges_length = *p++;
- chars_length = *p++;
- /* p points charset[6], so the address of the next instruction
- (charset[l+m+n+2o+k+p']) equals p[l+m+n+2*o+p'],
- where l=length of char_classes, m=length of collating_symbol,
- n=equivalence_class, o=length of char_range,
- p'=length of character. */
- workp = p;
- /* Update p to indicate the next instruction. */
- p += char_class_length + coll_symbol_length+ equiv_class_length +
- 2*ranges_length + chars_length;
-
- /* match with char_class? */
- for (i = 0; i < char_class_length ; i += CHAR_CLASS_SIZE)
- {
- wctype_t wctype;
- uintptr_t alignedp = ((uintptr_t)workp
- + __alignof__(wctype_t) - 1)
- & ~(uintptr_t)(__alignof__(wctype_t) - 1);
- wctype = *((wctype_t*)alignedp);
- workp += CHAR_CLASS_SIZE;
- if (iswctype((wint_t)c, wctype))
- goto char_set_matched;
- }
-
- /* match with collating_symbol? */
-# ifdef _LIBC
- if (nrules != 0)
- {
- const unsigned char *extra = (const unsigned char *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB);
-
- for (workp2 = workp + coll_symbol_length ; workp < workp2 ;
- workp++)
- {
- int32_t *wextra;
- wextra = (int32_t*)(extra + *workp++);
- for (i = 0; i < *wextra; ++i)
- if (TRANSLATE(d[i]) != wextra[1 + i])
- break;
-
- if (i == *wextra)
- {
- /* Update d, however d will be incremented at
- char_set_matched:, we decrement d here. */
- d += i - 1;
- goto char_set_matched;
- }
- }
- }
- else /* (nrules == 0) */
-# endif
- /* If we can't look up collation data, we use wcscoll
- instead. */
- {
- for (workp2 = workp + coll_symbol_length ; workp < workp2 ;)
- {
- const CHAR_T *backup_d = d, *backup_dend = dend;
- length = wcslen (workp);
-
- /* If wcscoll(the collating symbol, whole string) > 0,
- any substring of the string never match with the
- collating symbol. */
- if (wcscoll (workp, d) > 0)
- {
- workp += length + 1;
- continue;
- }
-
- /* First, we compare the collating symbol with
- the first character of the string.
- If it don't match, we add the next character to
- the compare buffer in turn. */
- for (i = 0 ; i < WORK_BUFFER_SIZE-1 ; i++, d++)
- {
- int match;
- if (d == dend)
- {
- if (dend == end_match_2)
- break;
- d = string2;
- dend = end_match_2;
- }
-
- /* add next character to the compare buffer. */
- str_buf[i] = TRANSLATE(*d);
- str_buf[i+1] = '\0';
-
- match = wcscoll (workp, str_buf);
- if (match == 0)
- goto char_set_matched;
-
- if (match < 0)
- /* (str_buf > workp) indicate (str_buf + X > workp),
- because for all X (str_buf + X > str_buf).
- So we don't need continue this loop. */
- break;
-
- /* Otherwise(str_buf < workp),
- (str_buf+next_character) may equals (workp).
- So we continue this loop. */
- }
- /* not matched */
- d = backup_d;
- dend = backup_dend;
- workp += length + 1;
- }
- }
- /* match with equivalence_class? */
-# ifdef _LIBC
- if (nrules != 0)
- {
- const CHAR_T *backup_d = d, *backup_dend = dend;
- /* Try to match the equivalence class against
- those known to the collate implementation. */
- const int32_t *table;
- const int32_t *weights;
- const int32_t *extra;
- const int32_t *indirect;
- int32_t idx, idx2;
- wint_t *cp;
- size_t len;
-
- /* This #include defines a local function! */
-# include <locale/weightwc.h>
-
- table = (const int32_t *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_TABLEWC);
- weights = (const wint_t *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_WEIGHTWC);
- extra = (const wint_t *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_EXTRAWC);
- indirect = (const int32_t *)
- _NL_CURRENT (LC_COLLATE, _NL_COLLATE_INDIRECTWC);
-
- /* Write 1 collating element to str_buf, and
- get its index. */
- idx2 = 0;
-
- for (i = 0 ; idx2 == 0 && i < WORK_BUFFER_SIZE - 1; i++)
- {
- cp = (wint_t*)str_buf;
- if (d == dend)
- {
- if (dend == end_match_2)
- break;
- d = string2;
- dend = end_match_2;
- }
- str_buf[i] = TRANSLATE(*(d+i));
- str_buf[i+1] = '\0'; /* sentinel */
- idx2 = findidx ((const wint_t**)&cp);
- }
-
- /* Update d, however d will be incremented at
- char_set_matched:, we decrement d here. */
- d = backup_d + ((wchar_t*)cp - (wchar_t*)str_buf - 1);
- if (d >= dend)
- {
- if (dend == end_match_2)
- d = dend;
- else
- {
- d = string2;
- dend = end_match_2;
- }
- }
-
- len = weights[idx2];
-
- for (workp2 = workp + equiv_class_length ; workp < workp2 ;
- workp++)
- {
- idx = (int32_t)*workp;
- /* We already checked idx != 0 in regex_compile. */
-
- if (idx2 != 0 && len == weights[idx])
- {
- int cnt = 0;
- while (cnt < len && (weights[idx + 1 + cnt]
- == weights[idx2 + 1 + cnt]))
- ++cnt;
-
- if (cnt == len)
- goto char_set_matched;
- }
- }
- /* not matched */
- d = backup_d;
- dend = backup_dend;
- }
- else /* (nrules == 0) */
-# endif
- /* If we can't look up collation data, we use wcscoll
- instead. */
- {
- for (workp2 = workp + equiv_class_length ; workp < workp2 ;)
- {
- const CHAR_T *backup_d = d, *backup_dend = dend;
- length = wcslen (workp);
-
- /* If wcscoll(the collating symbol, whole string) > 0,
- any substring of the string never match with the
- collating symbol. */
- if (wcscoll (workp, d) > 0)
- {
- workp += length + 1;
- break;
- }
-
- /* First, we compare the equivalence class with
- the first character of the string.
- If it don't match, we add the next character to
- the compare buffer in turn. */
- for (i = 0 ; i < WORK_BUFFER_SIZE - 1 ; i++, d++)
- {
- int match;
- if (d == dend)
- {
- if (dend == end_match_2)
- break;
- d = string2;
- dend = end_match_2;
- }
-
- /* add next character to the compare buffer. */
- str_buf[i] = TRANSLATE(*d);
- str_buf[i+1] = '\0';
-
- match = wcscoll (workp, str_buf);
-
- if (match == 0)
- goto char_set_matched;
-
- if (match < 0)
- /* (str_buf > workp) indicate (str_buf + X > workp),
- because for all X (str_buf + X > str_buf).
- So we don't need continue this loop. */
- break;
-
- /* Otherwise(str_buf < workp),
- (str_buf+next_character) may equals (workp).
- So we continue this loop. */
- }
- /* not matched */
- d = backup_d;
- dend = backup_dend;
- workp += length + 1;
- }
- }
-
- /* match with char_range? */
-# ifdef _LIBC
- if (nrules != 0)
- {
- uint32_t collseqval;
- const char *collseq = (const char *)
- _NL_CURRENT(LC_COLLATE, _NL_COLLATE_COLLSEQWC);
-
- collseqval = collseq_table_lookup (collseq, c);
-
- for (; workp < p - chars_length ;)
- {
- uint32_t start_val, end_val;
-
- /* We already compute the collation sequence value
- of the characters (or collating symbols). */
- start_val = (uint32_t) *workp++; /* range_start */
- end_val = (uint32_t) *workp++; /* range_end */
-
- if (start_val <= collseqval && collseqval <= end_val)
- goto char_set_matched;
- }
- }
- else
-# endif
- {
- /* We set range_start_char at str_buf[0], range_end_char
- at str_buf[4], and compared char at str_buf[2]. */
- str_buf[1] = 0;
- str_buf[2] = c;
- str_buf[3] = 0;
- str_buf[5] = 0;
- for (; workp < p - chars_length ;)
- {
- wchar_t *range_start_char, *range_end_char;
-
- /* match if (range_start_char <= c <= range_end_char). */
-
- /* If range_start(or end) < 0, we assume -range_start(end)
- is the offset of the collating symbol which is specified
- as the character of the range start(end). */
-
- /* range_start */
- if (*workp < 0)
- range_start_char = charset_top - (*workp++);
- else
- {
- str_buf[0] = *workp++;
- range_start_char = str_buf;
- }
-
- /* range_end */
- if (*workp < 0)
- range_end_char = charset_top - (*workp++);
- else
- {
- str_buf[4] = *workp++;
- range_end_char = str_buf + 4;
- }
-
- if (wcscoll (range_start_char, str_buf+2) <= 0
- && wcscoll (str_buf+2, range_end_char) <= 0)
- goto char_set_matched;
- }
- }
-
- /* match with char? */
- for (; workp < p ; workp++)
- if (c == *workp)
- goto char_set_matched;
-
- negate = !negate;
-
- char_set_matched:
- if (negate) goto fail;
-#else
- /* Cast to `unsigned' instead of `unsigned char' in case the
- bit list is a full 32 bytes long. */
- if (c < (unsigned) (*p * BYTEWIDTH)
- && p[1 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH)))
- negate = !negate;
-
- p += 1 + *p;
-
- if (!negate) goto fail;
-#undef WORK_BUFFER_SIZE
-#endif /* WCHAR */
- SET_REGS_MATCHED ();
- d++;
- NEXT;
- }
-
-
- /* The beginning of a group is represented by start_memory.
- The arguments are the register number in the next byte, and the
- number of groups inner to this one in the next. The text
- matched within the group is recorded (in the internal
- registers data structure) under the register number. */
- CASE (start_memory):
- DEBUG_PRINT3 ("EXECUTING start_memory %ld (%ld):\n",
- (long int) *p, (long int) p[1]);
-
- /* Find out if this group can match the empty string. */
- p1 = p; /* To send to group_match_null_string_p. */
-
- if (REG_MATCH_NULL_STRING_P (reg_info[*p]) == MATCH_NULL_UNSET_VALUE)
- REG_MATCH_NULL_STRING_P (reg_info[*p])
- = PREFIX(group_match_null_string_p) (&p1, pend, reg_info);
-
- /* Save the position in the string where we were the last time
- we were at this open-group operator in case the group is
- operated upon by a repetition operator, e.g., with `(a*)*b'
- against `ab'; then we want to ignore where we are now in
- the string in case this attempt to match fails. */
- old_regstart[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p])
- ? REG_UNSET (regstart[*p]) ? d : regstart[*p]
- : regstart[*p];
- DEBUG_PRINT2 (" old_regstart: %d\n",
- POINTER_TO_OFFSET (old_regstart[*p]));
-
- regstart[*p] = d;
- DEBUG_PRINT2 (" regstart: %d\n", POINTER_TO_OFFSET (regstart[*p]));
-
- IS_ACTIVE (reg_info[*p]) = 1;
- MATCHED_SOMETHING (reg_info[*p]) = 0;
-
- /* Clear this whenever we change the register activity status. */
- set_regs_matched_done = 0;
-
- /* This is the new highest active register. */
- highest_active_reg = *p;
-
- /* If nothing was active before, this is the new lowest active
- register. */
- if (lowest_active_reg == NO_LOWEST_ACTIVE_REG)
- lowest_active_reg = *p;
-
- /* Move past the register number and inner group count. */
- p += 2;
- just_past_start_mem = p;
-
- NEXT;
-
-
- /* The stop_memory opcode represents the end of a group. Its
- arguments are the same as start_memory's: the register
- number, and the number of inner groups. */
- CASE (stop_memory):
- DEBUG_PRINT3 ("EXECUTING stop_memory %ld (%ld):\n",
- (long int) *p, (long int) p[1]);
-
- /* We need to save the string position the last time we were at
- this close-group operator in case the group is operated
- upon by a repetition operator, e.g., with `((a*)*(b*)*)*'
- against `aba'; then we want to ignore where we are now in
- the string in case this attempt to match fails. */
- old_regend[*p] = REG_MATCH_NULL_STRING_P (reg_info[*p])
- ? REG_UNSET (regend[*p]) ? d : regend[*p]
- : regend[*p];
- DEBUG_PRINT2 (" old_regend: %d\n",
- POINTER_TO_OFFSET (old_regend[*p]));
-
- regend[*p] = d;
- DEBUG_PRINT2 (" regend: %d\n", POINTER_TO_OFFSET (regend[*p]));
-
- /* This register isn't active anymore. */
- IS_ACTIVE (reg_info[*p]) = 0;
-
- /* Clear this whenever we change the register activity status. */
- set_regs_matched_done = 0;
-
- /* If this was the only register active, nothing is active
- anymore. */
- if (lowest_active_reg == highest_active_reg)
- {
- lowest_active_reg = NO_LOWEST_ACTIVE_REG;
- highest_active_reg = NO_HIGHEST_ACTIVE_REG;
- }
- else
- { /* We must scan for the new highest active register, since
- it isn't necessarily one less than now: consider
- (a(b)c(d(e)f)g). When group 3 ends, after the f), the
- new highest active register is 1. */
- UCHAR_T r = *p - 1;
- while (r > 0 && !IS_ACTIVE (reg_info[r]))
- r--;
-
- /* If we end up at register zero, that means that we saved
- the registers as the result of an `on_failure_jump', not
- a `start_memory', and we jumped to past the innermost
- `stop_memory'. For example, in ((.)*) we save
- registers 1 and 2 as a result of the *, but when we pop
- back to the second ), we are at the stop_memory 1.
- Thus, nothing is active. */
- if (r == 0)
- {
- lowest_active_reg = NO_LOWEST_ACTIVE_REG;
- highest_active_reg = NO_HIGHEST_ACTIVE_REG;
- }
- else
- highest_active_reg = r;
- }
-
- /* If just failed to match something this time around with a
- group that's operated on by a repetition operator, try to
- force exit from the ``loop'', and restore the register
- information for this group that we had before trying this
- last match. */
- if ((!MATCHED_SOMETHING (reg_info[*p])
- || just_past_start_mem == p - 1)
- && (p + 2) < pend)
- {
- boolean is_a_jump_n = false;
-
- p1 = p + 2;
- mcnt = 0;
- switch ((re_opcode_t) *p1++)
- {
- case jump_n:
- is_a_jump_n = true;
- case pop_failure_jump:
- case maybe_pop_jump:
- case jump:
- case dummy_failure_jump:
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- if (is_a_jump_n)
- p1 += OFFSET_ADDRESS_SIZE;
- break;
-
- default:
- /* do nothing */ ;
- }
- p1 += mcnt;
-
- /* If the next operation is a jump backwards in the pattern
- to an on_failure_jump right before the start_memory
- corresponding to this stop_memory, exit from the loop
- by forcing a failure after pushing on the stack the
- on_failure_jump's jump in the pattern, and d. */
- if (mcnt < 0 && (re_opcode_t) *p1 == on_failure_jump
- && (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == start_memory
- && p1[2+OFFSET_ADDRESS_SIZE] == *p)
- {
- /* If this group ever matched anything, then restore
- what its registers were before trying this last
- failed match, e.g., with `(a*)*b' against `ab' for
- regstart[1], and, e.g., with `((a*)*(b*)*)*'
- against `aba' for regend[3].
-
- Also restore the registers for inner groups for,
- e.g., `((a*)(b*))*' against `aba' (register 3 would
- otherwise get trashed). */
-
- if (EVER_MATCHED_SOMETHING (reg_info[*p]))
- {
- unsigned r;
-
- EVER_MATCHED_SOMETHING (reg_info[*p]) = 0;
-
- /* Restore this and inner groups' (if any) registers. */
- for (r = *p; r < (unsigned) *p + (unsigned) *(p + 1);
- r++)
- {
- regstart[r] = old_regstart[r];
-
- /* xx why this test? */
- if (old_regend[r] >= regstart[r])
- regend[r] = old_regend[r];
- }
- }
- p1++;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- PUSH_FAILURE_POINT (p1 + mcnt, d, -2);
-
- goto fail;
- }
- }
-
- /* Move past the register number and the inner group count. */
- p += 2;
- NEXT;
-
-
- /* \<digit> has been turned into a `duplicate' command which is
- followed by the numeric value of <digit> as the register number. */
- CASE (duplicate):
- {
- register const CHAR_T *d2, *dend2;
- int regno = *p++; /* Get which register to match against. */
- DEBUG_PRINT2 ("EXECUTING duplicate %d.\n", regno);
-
- /* Can't back reference a group which we've never matched. */
- if (REG_UNSET (regstart[regno]) || REG_UNSET (regend[regno]))
- goto fail;
-
- /* Where in input to try to start matching. */
- d2 = regstart[regno];
-
- /* Where to stop matching; if both the place to start and
- the place to stop matching are in the same string, then
- set to the place to stop, otherwise, for now have to use
- the end of the first string. */
-
- dend2 = ((FIRST_STRING_P (regstart[regno])
- == FIRST_STRING_P (regend[regno]))
- ? regend[regno] : end_match_1);
- for (;;)
- {
- /* If necessary, advance to next segment in register
- contents. */
- while (d2 == dend2)
- {
- if (dend2 == end_match_2) break;
- if (dend2 == regend[regno]) break;
-
- /* End of string1 => advance to string2. */
- d2 = string2;
- dend2 = regend[regno];
- }
- /* At end of register contents => success */
- if (d2 == dend2) break;
-
- /* If necessary, advance to next segment in data. */
- PREFETCH ();
-
- /* How many characters left in this segment to match. */
- mcnt = dend - d;
-
- /* Want how many consecutive characters we can match in
- one shot, so, if necessary, adjust the count. */
- if (mcnt > dend2 - d2)
- mcnt = dend2 - d2;
-
- /* Compare that many; failure if mismatch, else move
- past them. */
- if (translate
- ? PREFIX(bcmp_translate) (d, d2, mcnt, translate)
- : memcmp (d, d2, mcnt*sizeof(UCHAR_T)))
- goto fail;
- d += mcnt, d2 += mcnt;
-
- /* Do this because we've match some characters. */
- SET_REGS_MATCHED ();
- }
- }
- NEXT;
-
-
- /* begline matches the empty string at the beginning of the string
- (unless `not_bol' is set in `bufp'), and, if
- `newline_anchor' is set, after newlines. */
- CASE (begline):
- DEBUG_PRINT1 ("EXECUTING begline.\n");
-
- if (AT_STRINGS_BEG (d))
- {
- if (!bufp->not_bol)
- {
- NEXT;
- }
- }
- else if (d[-1] == '\n' && bufp->newline_anchor)
- {
- NEXT;
- }
- /* In all other cases, we fail. */
- goto fail;
-
-
- /* endline is the dual of begline. */
- CASE (endline):
- DEBUG_PRINT1 ("EXECUTING endline.\n");
-
- if (AT_STRINGS_END (d))
- {
- if (!bufp->not_eol)
- {
- NEXT;
- }
- }
-
- /* We have to ``prefetch'' the next character. */
- else if ((d == end1 ? *string2 : *d) == '\n'
- && bufp->newline_anchor)
- {
- NEXT;
- }
- goto fail;
-
-
- /* Match at the very beginning of the data. */
- CASE (begbuf):
- DEBUG_PRINT1 ("EXECUTING begbuf.\n");
- if (AT_STRINGS_BEG (d))
- {
- NEXT;
- }
- goto fail;
-
-
- /* Match at the very end of the data. */
- CASE (endbuf):
- DEBUG_PRINT1 ("EXECUTING endbuf.\n");
- if (AT_STRINGS_END (d))
- {
- NEXT;
- }
- goto fail;
-
-
- /* on_failure_keep_string_jump is used to optimize `.*\n'. It
- pushes NULL as the value for the string on the stack. Then
- `pop_failure_point' will keep the current value for the
- string, instead of restoring it. To see why, consider
- matching `foo\nbar' against `.*\n'. The .* matches the foo;
- then the . fails against the \n. But the next thing we want
- to do is match the \n against the \n; if we restored the
- string value, we would be back at the foo.
-
- Because this is used only in specific cases, we don't need to
- check all the things that `on_failure_jump' does, to make
- sure the right things get saved on the stack. Hence we don't
- share its code. The only reason to push anything on the
- stack at all is that otherwise we would have to change
- `anychar's code to do something besides goto fail in this
- case; that seems worse than this. */
- CASE (on_failure_keep_string_jump):
- DEBUG_PRINT1 ("EXECUTING on_failure_keep_string_jump");
-
- EXTRACT_NUMBER_AND_INCR (mcnt, p);
-#ifdef _LIBC
- DEBUG_PRINT3 (" %d (to %p):\n", mcnt, p + mcnt);
-#else
- DEBUG_PRINT3 (" %d (to 0x%x):\n", mcnt, p + mcnt);
-#endif
-
- PUSH_FAILURE_POINT (p + mcnt, NULL, -2);
- NEXT;
-
-
- /* Uses of on_failure_jump:
-
- Each alternative starts with an on_failure_jump that points
- to the beginning of the next alternative. Each alternative
- except the last ends with a jump that in effect jumps past
- the rest of the alternatives. (They really jump to the
- ending jump of the following alternative, because tensioning
- these jumps is a hassle.)
-
- Repeats start with an on_failure_jump that points past both
- the repetition text and either the following jump or
- pop_failure_jump back to this on_failure_jump. */
- CASE (on_failure_jump):
- on_failure:
- DEBUG_PRINT1 ("EXECUTING on_failure_jump");
-
- EXTRACT_NUMBER_AND_INCR (mcnt, p);
-#ifdef _LIBC
- DEBUG_PRINT3 (" %d (to %p)", mcnt, p + mcnt);
-#else
- DEBUG_PRINT3 (" %d (to 0x%x)", mcnt, p + mcnt);
-#endif
-
- /* If this on_failure_jump comes right before a group (i.e.,
- the original * applied to a group), save the information
- for that group and all inner ones, so that if we fail back
- to this point, the group's information will be correct.
- For example, in \(a*\)*\1, we need the preceding group,
- and in \(zz\(a*\)b*\)\2, we need the inner group. */
-
- /* We can't use `p' to check ahead because we push
- a failure point to `p + mcnt' after we do this. */
- p1 = p;
-
- /* We need to skip no_op's before we look for the
- start_memory in case this on_failure_jump is happening as
- the result of a completed succeed_n, as in \(a\)\{1,3\}b\1
- against aba. */
- while (p1 < pend && (re_opcode_t) *p1 == no_op)
- p1++;
-
- if (p1 < pend && (re_opcode_t) *p1 == start_memory)
- {
- /* We have a new highest active register now. This will
- get reset at the start_memory we are about to get to,
- but we will have saved all the registers relevant to
- this repetition op, as described above. */
- highest_active_reg = *(p1 + 1) + *(p1 + 2);
- if (lowest_active_reg == NO_LOWEST_ACTIVE_REG)
- lowest_active_reg = *(p1 + 1);
- }
-
- DEBUG_PRINT1 (":\n");
- PUSH_FAILURE_POINT (p + mcnt, d, -2);
- NEXT;
-
-
- /* A smart repeat ends with `maybe_pop_jump'.
- We change it to either `pop_failure_jump' or `jump'. */
- CASE (maybe_pop_jump):
- EXTRACT_NUMBER_AND_INCR (mcnt, p);
- DEBUG_PRINT2 ("EXECUTING maybe_pop_jump %d.\n", mcnt);
- {
- register UCHAR_T *p2 = p;
-
- /* Compare the beginning of the repeat with what in the
- pattern follows its end. If we can establish that there
- is nothing that they would both match, i.e., that we
- would have to backtrack because of (as in, e.g., `a*a')
- then we can change to pop_failure_jump, because we'll
- never have to backtrack.
-
- This is not true in the case of alternatives: in
- `(a|ab)*' we do need to backtrack to the `ab' alternative
- (e.g., if the string was `ab'). But instead of trying to
- detect that here, the alternative has put on a dummy
- failure point which is what we will end up popping. */
-
- /* Skip over open/close-group commands.
- If what follows this loop is a ...+ construct,
- look at what begins its body, since we will have to
- match at least one of that. */
- while (1)
- {
- if (p2 + 2 < pend
- && ((re_opcode_t) *p2 == stop_memory
- || (re_opcode_t) *p2 == start_memory))
- p2 += 3;
- else if (p2 + 2 + 2 * OFFSET_ADDRESS_SIZE < pend
- && (re_opcode_t) *p2 == dummy_failure_jump)
- p2 += 2 + 2 * OFFSET_ADDRESS_SIZE;
- else
- break;
- }
-
- p1 = p + mcnt;
- /* p1[0] ... p1[2] are the `on_failure_jump' corresponding
- to the `maybe_finalize_jump' of this case. Examine what
- follows. */
-
- /* If we're at the end of the pattern, we can change. */
- if (p2 == pend)
- {
- /* Consider what happens when matching ":\(.*\)"
- against ":/". I don't really understand this code
- yet. */
- p[-(1+OFFSET_ADDRESS_SIZE)] = (UCHAR_T)
- pop_failure_jump;
- DEBUG_PRINT1
- (" End of pattern: change to `pop_failure_jump'.\n");
- }
-
- else if ((re_opcode_t) *p2 == exactn
-#ifdef MBS_SUPPORT
- || (re_opcode_t) *p2 == exactn_bin
-#endif
- || (bufp->newline_anchor && (re_opcode_t) *p2 == endline))
- {
- register UCHAR_T c
- = *p2 == (UCHAR_T) endline ? '\n' : p2[2];
-
- if (((re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn
-#ifdef MBS_SUPPORT
- || (re_opcode_t) p1[1+OFFSET_ADDRESS_SIZE] == exactn_bin
-#endif
- ) && p1[3+OFFSET_ADDRESS_SIZE] != c)
- {
- p[-(1+OFFSET_ADDRESS_SIZE)] = (UCHAR_T)
- pop_failure_jump;
-#ifdef WCHAR
- DEBUG_PRINT3 (" %C != %C => pop_failure_jump.\n",
- (wint_t) c,
- (wint_t) p1[3+OFFSET_ADDRESS_SIZE]);
-#else
- DEBUG_PRINT3 (" %c != %c => pop_failure_jump.\n",
- (char) c,
- (char) p1[3+OFFSET_ADDRESS_SIZE]);
-#endif
- }
-
-#ifndef WCHAR
- else if ((re_opcode_t) p1[3] == charset
- || (re_opcode_t) p1[3] == charset_not)
- {
- int negate = (re_opcode_t) p1[3] == charset_not;
-
- if (c < (unsigned) (p1[4] * BYTEWIDTH)
- && p1[5 + c / BYTEWIDTH] & (1 << (c % BYTEWIDTH)))
- negate = !negate;
-
- /* `negate' is equal to 1 if c would match, which means
- that we can't change to pop_failure_jump. */
- if (!negate)
- {
- p[-3] = (unsigned char) pop_failure_jump;
- DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
- }
- }
-#endif /* not WCHAR */
- }
-#ifndef WCHAR
- else if ((re_opcode_t) *p2 == charset)
- {
- /* We win if the first character of the loop is not part
- of the charset. */
- if ((re_opcode_t) p1[3] == exactn
- && ! ((int) p2[1] * BYTEWIDTH > (int) p1[5]
- && (p2[2 + p1[5] / BYTEWIDTH]
- & (1 << (p1[5] % BYTEWIDTH)))))
- {
- p[-3] = (unsigned char) pop_failure_jump;
- DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
- }
-
- else if ((re_opcode_t) p1[3] == charset_not)
- {
- int idx;
- /* We win if the charset_not inside the loop
- lists every character listed in the charset after. */
- for (idx = 0; idx < (int) p2[1]; idx++)
- if (! (p2[2 + idx] == 0
- || (idx < (int) p1[4]
- && ((p2[2 + idx] & ~ p1[5 + idx]) == 0))))
- break;
-
- if (idx == p2[1])
- {
- p[-3] = (unsigned char) pop_failure_jump;
- DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
- }
- }
- else if ((re_opcode_t) p1[3] == charset)
- {
- int idx;
- /* We win if the charset inside the loop
- has no overlap with the one after the loop. */
- for (idx = 0;
- idx < (int) p2[1] && idx < (int) p1[4];
- idx++)
- if ((p2[2 + idx] & p1[5 + idx]) != 0)
- break;
-
- if (idx == p2[1] || idx == p1[4])
- {
- p[-3] = (unsigned char) pop_failure_jump;
- DEBUG_PRINT1 (" No match => pop_failure_jump.\n");
- }
- }
- }
-#endif /* not WCHAR */
- }
- p -= OFFSET_ADDRESS_SIZE; /* Point at relative address again. */
- if ((re_opcode_t) p[-1] != pop_failure_jump)
- {
- p[-1] = (UCHAR_T) jump;
- DEBUG_PRINT1 (" Match => jump.\n");
- goto unconditional_jump;
- }
- /* Note fall through. */
-
-
- /* The end of a simple repeat has a pop_failure_jump back to
- its matching on_failure_jump, where the latter will push a
- failure point. The pop_failure_jump takes off failure
- points put on by this pop_failure_jump's matching
- on_failure_jump; we got through the pattern to here from the
- matching on_failure_jump, so didn't fail. */
- CASE (pop_failure_jump):
- {
- /* We need to pass separate storage for the lowest and
- highest registers, even though we don't care about the
- actual values. Otherwise, we will restore only one
- register from the stack, since lowest will == highest in
- `pop_failure_point'. */
- active_reg_t dummy_low_reg, dummy_high_reg;
- UCHAR_T *pdummy = NULL;
- const CHAR_T *sdummy = NULL;
-
- DEBUG_PRINT1 ("EXECUTING pop_failure_jump.\n");
- POP_FAILURE_POINT (sdummy, pdummy,
- dummy_low_reg, dummy_high_reg,
- reg_dummy, reg_dummy, reg_info_dummy);
- }
- /* Note fall through. */
-
- unconditional_jump:
-#ifdef _LIBC
- DEBUG_PRINT2 ("\n%p: ", p);
-#else
- DEBUG_PRINT2 ("\n0x%x: ", p);
-#endif
- /* Note fall through. */
-
- /* Unconditionally jump (without popping any failure points). */
- CASE (jump):
- EXTRACT_NUMBER_AND_INCR (mcnt, p); /* Get the amount to jump. */
- DEBUG_PRINT2 ("EXECUTING jump %d ", mcnt);
- p += mcnt; /* Do the jump. */
-#ifdef _LIBC
- DEBUG_PRINT2 ("(to %p).\n", p);
-#else
- DEBUG_PRINT2 ("(to 0x%x).\n", p);
-#endif
- NEXT;
-
-
- /* We need this opcode so we can detect where alternatives end
- in `group_match_null_string_p' et al. */
- CASE (jump_past_alt):
- DEBUG_PRINT1 ("EXECUTING jump_past_alt.\n");
- goto unconditional_jump;
-
-
- /* Normally, the on_failure_jump pushes a failure point, which
- then gets popped at pop_failure_jump. We will end up at
- pop_failure_jump, also, and with a pattern of, say, `a+', we
- are skipping over the on_failure_jump, so we have to push
- something meaningless for pop_failure_jump to pop. */
- CASE (dummy_failure_jump):
- DEBUG_PRINT1 ("EXECUTING dummy_failure_jump.\n");
- /* It doesn't matter what we push for the string here. What
- the code at `fail' tests is the value for the pattern. */
- PUSH_FAILURE_POINT (NULL, NULL, -2);
- goto unconditional_jump;
-
-
- /* At the end of an alternative, we need to push a dummy failure
- point in case we are followed by a `pop_failure_jump', because
- we don't want the failure point for the alternative to be
- popped. For example, matching `(a|ab)*' against `aab'
- requires that we match the `ab' alternative. */
- CASE (push_dummy_failure):
- DEBUG_PRINT1 ("EXECUTING push_dummy_failure.\n");
- /* See comments just above at `dummy_failure_jump' about the
- two zeroes. */
- PUSH_FAILURE_POINT (NULL, NULL, -2);
- NEXT;
-
- /* Have to succeed matching what follows at least n times.
- After that, handle like `on_failure_jump'. */
- CASE (succeed_n):
- EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE);
- DEBUG_PRINT2 ("EXECUTING succeed_n %d.\n", mcnt);
-
- assert (mcnt >= 0);
- /* Originally, this is how many times we HAVE to succeed. */
- if (mcnt > 0)
- {
- mcnt--;
- p += OFFSET_ADDRESS_SIZE;
- STORE_NUMBER_AND_INCR (p, mcnt);
-#ifdef _LIBC
- DEBUG_PRINT3 (" Setting %p to %d.\n", p - OFFSET_ADDRESS_SIZE
- , mcnt);
-#else
- DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p - OFFSET_ADDRESS_SIZE
- , mcnt);
-#endif
- }
- else if (mcnt == 0)
- {
-#ifdef _LIBC
- DEBUG_PRINT2 (" Setting two bytes from %p to no_op.\n",
- p + OFFSET_ADDRESS_SIZE);
-#else
- DEBUG_PRINT2 (" Setting two bytes from 0x%x to no_op.\n",
- p + OFFSET_ADDRESS_SIZE);
-#endif /* _LIBC */
-
-#ifdef WCHAR
- p[1] = (UCHAR_T) no_op;
-#else
- p[2] = (UCHAR_T) no_op;
- p[3] = (UCHAR_T) no_op;
-#endif /* WCHAR */
- goto on_failure;
- }
- NEXT;
-
- CASE (jump_n):
- EXTRACT_NUMBER (mcnt, p + OFFSET_ADDRESS_SIZE);
- DEBUG_PRINT2 ("EXECUTING jump_n %d.\n", mcnt);
-
- /* Originally, this is how many times we CAN jump. */
- if (mcnt)
- {
- mcnt--;
- STORE_NUMBER (p + OFFSET_ADDRESS_SIZE, mcnt);
-
-#ifdef _LIBC
- DEBUG_PRINT3 (" Setting %p to %d.\n", p + OFFSET_ADDRESS_SIZE,
- mcnt);
-#else
- DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p + OFFSET_ADDRESS_SIZE,
- mcnt);
-#endif /* _LIBC */
- goto unconditional_jump;
- }
- /* If don't have to jump any more, skip over the rest of command. */
- else
- p += 2 * OFFSET_ADDRESS_SIZE;
- NEXT;
-
- CASE (set_number_at):
- {
- DEBUG_PRINT1 ("EXECUTING set_number_at.\n");
-
- EXTRACT_NUMBER_AND_INCR (mcnt, p);
- p1 = p + mcnt;
- EXTRACT_NUMBER_AND_INCR (mcnt, p);
-#ifdef _LIBC
- DEBUG_PRINT3 (" Setting %p to %d.\n", p1, mcnt);
-#else
- DEBUG_PRINT3 (" Setting 0x%x to %d.\n", p1, mcnt);
-#endif
- STORE_NUMBER (p1, mcnt);
- NEXT;
- }
-
-#if 0
- /* The DEC Alpha C compiler 3.x generates incorrect code for the
- test WORDCHAR_P (d - 1) != WORDCHAR_P (d) in the expansion of
- AT_WORD_BOUNDARY, so this code is disabled. Expanding the
- macro and introducing temporary variables works around the bug. */
-
- CASE (wordbound):
- DEBUG_PRINT1 ("EXECUTING wordbound.\n");
- if (AT_WORD_BOUNDARY (d))
- {
- NEXT;
- }
- goto fail;
-
- CASE (notwordbound):
- DEBUG_PRINT1 ("EXECUTING notwordbound.\n");
- if (AT_WORD_BOUNDARY (d))
- goto fail;
- NEXT;
-#else
- CASE (wordbound):
- {
- boolean prevchar, thischar;
-
- DEBUG_PRINT1 ("EXECUTING wordbound.\n");
- if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d))
- {
- NEXT;
- }
-
- prevchar = WORDCHAR_P (d - 1);
- thischar = WORDCHAR_P (d);
- if (prevchar != thischar)
- {
- NEXT;
- }
- goto fail;
- }
-
- CASE (notwordbound):
- {
- boolean prevchar, thischar;
-
- DEBUG_PRINT1 ("EXECUTING notwordbound.\n");
- if (AT_STRINGS_BEG (d) || AT_STRINGS_END (d))
- goto fail;
-
- prevchar = WORDCHAR_P (d - 1);
- thischar = WORDCHAR_P (d);
- if (prevchar != thischar)
- goto fail;
- NEXT;
- }
-#endif
-
- CASE (wordbeg):
- DEBUG_PRINT1 ("EXECUTING wordbeg.\n");
- if (!AT_STRINGS_END (d) && WORDCHAR_P (d)
- && (AT_STRINGS_BEG (d) || !WORDCHAR_P (d - 1)))
- {
- NEXT;
- }
- goto fail;
-
- CASE (wordend):
- DEBUG_PRINT1 ("EXECUTING wordend.\n");
- if (!AT_STRINGS_BEG (d) && WORDCHAR_P (d - 1)
- && (AT_STRINGS_END (d) || !WORDCHAR_P (d)))
- {
- NEXT;
- }
- goto fail;
-
-#ifdef emacs
- CASE (before_dot):
- DEBUG_PRINT1 ("EXECUTING before_dot.\n");
- if (PTR_CHAR_POS ((unsigned char *) d) >= point)
- goto fail;
- NEXT;
-
- CASE (at_dot):
- DEBUG_PRINT1 ("EXECUTING at_dot.\n");
- if (PTR_CHAR_POS ((unsigned char *) d) != point)
- goto fail;
- NEXT;
-
- CASE (after_dot):
- DEBUG_PRINT1 ("EXECUTING after_dot.\n");
- if (PTR_CHAR_POS ((unsigned char *) d) <= point)
- goto fail;
- NEXT;
-
- CASE (syntaxspec):
- DEBUG_PRINT2 ("EXECUTING syntaxspec %d.\n", mcnt);
- mcnt = *p++;
- goto matchsyntax;
-
- CASE (wordchar):
- DEBUG_PRINT1 ("EXECUTING Emacs wordchar.\n");
- mcnt = (int) Sword;
- matchsyntax:
- PREFETCH ();
- /* Can't use *d++ here; SYNTAX may be an unsafe macro. */
- d++;
- if (SYNTAX (d[-1]) != (enum syntaxcode) mcnt)
- goto fail;
- SET_REGS_MATCHED ();
- NEXT;
-
- CASE (notsyntaxspec):
- DEBUG_PRINT2 ("EXECUTING notsyntaxspec %d.\n", mcnt);
- mcnt = *p++;
- goto matchnotsyntax;
-
- CASE (notwordchar):
- DEBUG_PRINT1 ("EXECUTING Emacs notwordchar.\n");
- mcnt = (int) Sword;
- matchnotsyntax:
- PREFETCH ();
- /* Can't use *d++ here; SYNTAX may be an unsafe macro. */
- d++;
- if (SYNTAX (d[-1]) == (enum syntaxcode) mcnt)
- goto fail;
- SET_REGS_MATCHED ();
- NEXT;
-
-#else /* not emacs */
- CASE (wordchar):
- DEBUG_PRINT1 ("EXECUTING non-Emacs wordchar.\n");
- PREFETCH ();
- if (!WORDCHAR_P (d))
- goto fail;
- SET_REGS_MATCHED ();
- d++;
- NEXT;
-
- CASE (notwordchar):
- DEBUG_PRINT1 ("EXECUTING non-Emacs notwordchar.\n");
- PREFETCH ();
- if (WORDCHAR_P (d))
- goto fail;
- SET_REGS_MATCHED ();
- d++;
- NEXT;
-#endif /* not emacs */
-
-#ifndef __GNUC__
- default:
- abort ();
- }
- continue; /* Successfully executed one pattern command; keep going. */
-#endif
-
-
- /* We goto here if a matching operation fails. */
- fail:
- if (!FAIL_STACK_EMPTY ())
- { /* A restart point is known. Restore to that state. */
- DEBUG_PRINT1 ("\nFAIL:\n");
- POP_FAILURE_POINT (d, p,
- lowest_active_reg, highest_active_reg,
- regstart, regend, reg_info);
-
- /* If this failure point is a dummy, try the next one. */
- if (!p)
- goto fail;
-
- /* If we failed to the end of the pattern, don't examine *p. */
- assert (p <= pend);
- if (p < pend)
- {
- boolean is_a_jump_n = false;
-
- /* If failed to a backwards jump that's part of a repetition
- loop, need to pop this failure point and use the next one. */
- switch ((re_opcode_t) *p)
- {
- case jump_n:
- is_a_jump_n = true;
- case maybe_pop_jump:
- case pop_failure_jump:
- case jump:
- p1 = p + 1;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- p1 += mcnt;
-
- if ((is_a_jump_n && (re_opcode_t) *p1 == succeed_n)
- || (!is_a_jump_n
- && (re_opcode_t) *p1 == on_failure_jump))
- goto fail;
- break;
- default:
- /* do nothing */ ;
- }
- }
-
- if (d >= string1 && d <= end1)
- dend = end_match_1;
- }
- else
- break; /* Matching at this starting point really fails. */
- } /* for (;;) */
-
- if (best_regs_set)
- goto restore_best_regs;
-
- FREE_VARIABLES ();
-
- return -1; /* Failure to match. */
-} /* re_match_2 */
-\f
-/* Subroutine definitions for re_match_2. */
-
-
-/* We are passed P pointing to a register number after a start_memory.
-
- Return true if the pattern up to the corresponding stop_memory can
- match the empty string, and false otherwise.
-
- If we find the matching stop_memory, sets P to point to one past its number.
- Otherwise, sets P to an undefined byte less than or equal to END.
-
- We don't handle duplicates properly (yet). */
-
-static boolean
-PREFIX(group_match_null_string_p) (UCHAR_T **p, UCHAR_T *end,
- PREFIX(register_info_type) *reg_info)
-{
- int mcnt;
- /* Point to after the args to the start_memory. */
- UCHAR_T *p1 = *p + 2;
-
- while (p1 < end)
- {
- /* Skip over opcodes that can match nothing, and return true or
- false, as appropriate, when we get to one that can't, or to the
- matching stop_memory. */
-
- switch ((re_opcode_t) *p1)
- {
- /* Could be either a loop or a series of alternatives. */
- case on_failure_jump:
- p1++;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
-
- /* If the next operation is not a jump backwards in the
- pattern. */
-
- if (mcnt >= 0)
- {
- /* Go through the on_failure_jumps of the alternatives,
- seeing if any of the alternatives cannot match nothing.
- The last alternative starts with only a jump,
- whereas the rest start with on_failure_jump and end
- with a jump, e.g., here is the pattern for `a|b|c':
-
- /on_failure_jump/0/6/exactn/1/a/jump_past_alt/0/6
- /on_failure_jump/0/6/exactn/1/b/jump_past_alt/0/3
- /exactn/1/c
-
- So, we have to first go through the first (n-1)
- alternatives and then deal with the last one separately. */
-
-
- /* Deal with the first (n-1) alternatives, which start
- with an on_failure_jump (see above) that jumps to right
- past a jump_past_alt. */
-
- while ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] ==
- jump_past_alt)
- {
- /* `mcnt' holds how many bytes long the alternative
- is, including the ending `jump_past_alt' and
- its number. */
-
- if (!PREFIX(alt_match_null_string_p) (p1, p1 + mcnt -
- (1 + OFFSET_ADDRESS_SIZE),
- reg_info))
- return false;
-
- /* Move to right after this alternative, including the
- jump_past_alt. */
- p1 += mcnt;
-
- /* Break if it's the beginning of an n-th alternative
- that doesn't begin with an on_failure_jump. */
- if ((re_opcode_t) *p1 != on_failure_jump)
- break;
-
- /* Still have to check that it's not an n-th
- alternative that starts with an on_failure_jump. */
- p1++;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- if ((re_opcode_t) p1[mcnt-(1+OFFSET_ADDRESS_SIZE)] !=
- jump_past_alt)
- {
- /* Get to the beginning of the n-th alternative. */
- p1 -= 1 + OFFSET_ADDRESS_SIZE;
- break;
- }
- }
-
- /* Deal with the last alternative: go back and get number
- of the `jump_past_alt' just before it. `mcnt' contains
- the length of the alternative. */
- EXTRACT_NUMBER (mcnt, p1 - OFFSET_ADDRESS_SIZE);
-
- if (!PREFIX(alt_match_null_string_p) (p1, p1 + mcnt, reg_info))
- return false;
-
- p1 += mcnt; /* Get past the n-th alternative. */
- } /* if mcnt > 0 */
- break;
-
-
- case stop_memory:
- assert (p1[1] == **p);
- *p = p1 + 2;
- return true;
-
-
- default:
- if (!PREFIX(common_op_match_null_string_p) (&p1, end, reg_info))
- return false;
- }
- } /* while p1 < end */
-
- return false;
-} /* group_match_null_string_p */
-
-
-/* Similar to group_match_null_string_p, but doesn't deal with alternatives:
- It expects P to be the first byte of a single alternative and END one
- byte past the last. The alternative can contain groups. */
-
-static boolean
-PREFIX(alt_match_null_string_p) (UCHAR_T *p, UCHAR_T *end,
- PREFIX(register_info_type) *reg_info)
-{
- int mcnt;
- UCHAR_T *p1 = p;
-
- while (p1 < end)
- {
- /* Skip over opcodes that can match nothing, and break when we get
- to one that can't. */
-
- switch ((re_opcode_t) *p1)
- {
- /* It's a loop. */
- case on_failure_jump:
- p1++;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- p1 += mcnt;
- break;
-
- default:
- if (!PREFIX(common_op_match_null_string_p) (&p1, end, reg_info))
- return false;
- }
- } /* while p1 < end */
-
- return true;
-} /* alt_match_null_string_p */
-
-
-/* Deals with the ops common to group_match_null_string_p and
- alt_match_null_string_p.
-
- Sets P to one after the op and its arguments, if any. */
-
-static boolean
-PREFIX(common_op_match_null_string_p) (UCHAR_T **p, UCHAR_T *end,
- PREFIX(register_info_type) *reg_info)
-{
- int mcnt;
- boolean ret;
- int reg_no;
- UCHAR_T *p1 = *p;
-
- switch ((re_opcode_t) *p1++)
- {
- case no_op:
- case begline:
- case endline:
- case begbuf:
- case endbuf:
- case wordbeg:
- case wordend:
- case wordbound:
- case notwordbound:
-#ifdef emacs
- case before_dot:
- case at_dot:
- case after_dot:
-#endif
- break;
-
- case start_memory:
- reg_no = *p1;
- assert (reg_no > 0 && reg_no <= MAX_REGNUM);
- ret = PREFIX(group_match_null_string_p) (&p1, end, reg_info);
-
- /* Have to set this here in case we're checking a group which
- contains a group and a back reference to it. */
-
- if (REG_MATCH_NULL_STRING_P (reg_info[reg_no]) == MATCH_NULL_UNSET_VALUE)
- REG_MATCH_NULL_STRING_P (reg_info[reg_no]) = ret;
-
- if (!ret)
- return false;
- break;
-
- /* If this is an optimized succeed_n for zero times, make the jump. */
- case jump:
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- if (mcnt >= 0)
- p1 += mcnt;
- else
- return false;
- break;
-
- case succeed_n:
- /* Get to the number of times to succeed. */
- p1 += OFFSET_ADDRESS_SIZE;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
-
- if (mcnt == 0)
- {
- p1 -= 2 * OFFSET_ADDRESS_SIZE;
- EXTRACT_NUMBER_AND_INCR (mcnt, p1);
- p1 += mcnt;
- }
- else
- return false;
- break;
-
- case duplicate:
- if (!REG_MATCH_NULL_STRING_P (reg_info[*p1]))
- return false;
- break;
-
- case set_number_at:
- p1 += 2 * OFFSET_ADDRESS_SIZE;
-
- default:
- /* All other opcodes mean we cannot match the empty string. */
- return false;
- }
-
- *p = p1;
- return true;
-} /* common_op_match_null_string_p */
-
-
-/* Return zero if TRANSLATE[S1] and TRANSLATE[S2] are identical for LEN
- bytes; nonzero otherwise. */
-
-static int
-PREFIX(bcmp_translate) (const CHAR_T *s1, const CHAR_T *s2,
- register int len,
- RE_TRANSLATE_TYPE translate)
-{
- register const UCHAR_T *p1 = (const UCHAR_T *) s1;
- register const UCHAR_T *p2 = (const UCHAR_T *) s2;
- while (len)
- {
-#ifdef WCHAR
- if (((*p1<=0xff)?translate[*p1++]:*p1++)
- != ((*p2<=0xff)?translate[*p2++]:*p2++))
- return 1;
-#else /* BYTE */
- if (translate[*p1++] != translate[*p2++]) return 1;
-#endif /* WCHAR */
- len--;
- }
- return 0;
-}
-\f
-
-#else /* not INSIDE_RECURSION */
-
-/* Entry points for GNU code. */
-
-/* re_compile_pattern is the GNU regular expression compiler: it
- compiles PATTERN (of length SIZE) and puts the result in BUFP.
- Returns 0 if the pattern was valid, otherwise an error string.
-
- Assumes the `allocated' (and perhaps `buffer') and `translate' fields
- are set in BUFP on entry.
-
- We call regex_compile to do the actual compilation. */
-
-const char *
-re_compile_pattern (const char *pattern,
- size_t length,
- struct re_pattern_buffer *bufp)
-{
- reg_errcode_t ret;
-
- /* GNU code is written to assume at least RE_NREGS registers will be set
- (and at least one extra will be -1). */
- bufp->regs_allocated = REGS_UNALLOCATED;
-
- /* And GNU code determines whether or not to get register information
- by passing null for the REGS argument to re_match, etc., not by
- setting no_sub. */
- bufp->no_sub = 0;
-
- /* Match anchors at newline. */
- bufp->newline_anchor = 1;
-
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- ret = wcs_regex_compile (pattern, length, re_syntax_options, bufp);
- else
-# endif
- ret = byte_regex_compile (pattern, length, re_syntax_options, bufp);
-
- if (!ret)
- return NULL;
- return gettext (re_error_msgid + re_error_msgid_idx[(int) ret]);
-}
-#ifdef _LIBC
-weak_alias (__re_compile_pattern, re_compile_pattern)
-#endif
-\f
-/* Entry points compatible with 4.2 BSD regex library. We don't define
- them unless specifically requested. */
-
-#if defined _REGEX_RE_COMP || defined _LIBC
-
-/* BSD has one and only one pattern buffer. */
-static struct re_pattern_buffer re_comp_buf;
-
-char *
-#ifdef _LIBC
-/* Make these definitions weak in libc, so POSIX programs can redefine
- these names if they don't use our functions, and still use
- regcomp/regexec below without link errors. */
-weak_function
-#endif
-re_comp (const char *s)
-{
- reg_errcode_t ret;
-
- if (!s)
- {
- if (!re_comp_buf.buffer)
- return (char *) gettext ("No previous regular expression");
- return 0;
- }
-
- if (!re_comp_buf.buffer)
- {
- re_comp_buf.buffer = malloc (200);
- if (re_comp_buf.buffer == NULL)
- return (char *) gettext (re_error_msgid
- + re_error_msgid_idx[(int) REG_ESPACE]);
- re_comp_buf.allocated = 200;
-
- re_comp_buf.fastmap = malloc (1 << BYTEWIDTH);
- if (re_comp_buf.fastmap == NULL)
- return (char *) gettext (re_error_msgid
- + re_error_msgid_idx[(int) REG_ESPACE]);
- }
-
- /* Since `re_exec' always passes NULL for the `regs' argument, we
- don't need to initialize the pattern buffer fields which affect it. */
-
- /* Match anchors at newlines. */
- re_comp_buf.newline_anchor = 1;
-
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- ret = wcs_regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf);
- else
-# endif
- ret = byte_regex_compile (s, strlen (s), re_syntax_options, &re_comp_buf);
-
- if (!ret)
- return NULL;
-
- /* Yes, we're discarding `const' here if !HAVE_LIBINTL. */
- return (char *) gettext (re_error_msgid + re_error_msgid_idx[(int) ret]);
-}
-
-
-int
-#ifdef _LIBC
-weak_function
-#endif
-re_exec (const char *s)
-{
- const int len = strlen (s);
- return
- 0 <= re_search (&re_comp_buf, s, len, 0, len, 0);
-}
-
-#endif /* _REGEX_RE_COMP */
-\f
-/* POSIX.2 functions. Don't define these for Emacs. */
-
-#ifndef emacs
-
-/* regcomp takes a regular expression as a string and compiles it.
-
- PREG is a regex_t *. We do not expect any fields to be initialized,
- since POSIX says we shouldn't. Thus, we set
-
- `buffer' to the compiled pattern;
- `used' to the length of the compiled pattern;
- `syntax' to RE_SYNTAX_POSIX_EXTENDED if the
- REG_EXTENDED bit in CFLAGS is set; otherwise, to
- RE_SYNTAX_POSIX_BASIC;
- `newline_anchor' to REG_NEWLINE being set in CFLAGS;
- `fastmap' to an allocated space for the fastmap;
- `fastmap_accurate' to zero;
- `re_nsub' to the number of subexpressions in PATTERN.
-
- PATTERN is the address of the pattern string.
-
- CFLAGS is a series of bits which affect compilation.
-
- If REG_EXTENDED is set, we use POSIX extended syntax; otherwise, we
- use POSIX basic syntax.
-
- If REG_NEWLINE is set, then . and [^...] don't match newline.
- Also, regexec will try a match beginning after every newline.
-
- If REG_ICASE is set, then we considers upper- and lowercase
- versions of letters to be equivalent when matching.
-
- If REG_NOSUB is set, then when PREG is passed to regexec, that
- routine will report only success or failure, and nothing about the
- registers.
-
- It returns 0 if it succeeds, nonzero if it doesn't. (See regex.h for
- the return codes and their meanings.) */
-
-int
-regcomp (regex_t *preg, const char *pattern, int cflags)
-{
- reg_errcode_t ret;
- reg_syntax_t syntax
- = (cflags & REG_EXTENDED) ?
- RE_SYNTAX_POSIX_EXTENDED : RE_SYNTAX_POSIX_BASIC;
-
- /* regex_compile will allocate the space for the compiled pattern. */
- preg->buffer = 0;
- preg->allocated = 0;
- preg->used = 0;
-
- /* Try to allocate space for the fastmap. */
- preg->fastmap = (char *) malloc (1 << BYTEWIDTH);
-
- if (cflags & REG_ICASE)
- {
- unsigned i;
-
- preg->translate =
- (RE_TRANSLATE_TYPE)
- malloc (CHAR_SET_SIZE * sizeof (*(RE_TRANSLATE_TYPE)0));
- if (preg->translate == NULL)
- return (int) REG_ESPACE;
-
- /* Map uppercase characters to corresponding lowercase ones. */
- for (i = 0; i < CHAR_SET_SIZE; i++)
- preg->translate[i] = ISUPPER (i) ? TOLOWER (i) : i;
- }
- else
- preg->translate = NULL;
-
- /* If REG_NEWLINE is set, newlines are treated differently. */
- if (cflags & REG_NEWLINE)
- { /* REG_NEWLINE implies neither . nor [^...] match newline. */
- syntax &= ~RE_DOT_NEWLINE;
- syntax |= RE_HAT_LISTS_NOT_NEWLINE;
- /* It also changes the matching behavior. */
- preg->newline_anchor = 1;
- }
- else
- preg->newline_anchor = 0;
-
- preg->no_sub = !!(cflags & REG_NOSUB);
-
- /* POSIX says a null character in the pattern terminates it, so we
- can use strlen here in compiling the pattern. */
-# ifdef MBS_SUPPORT
- if (MB_CUR_MAX != 1)
- ret = wcs_regex_compile (pattern, strlen (pattern), syntax, preg);
- else
-# endif
- ret = byte_regex_compile (pattern, strlen (pattern), syntax, preg);
-
- /* POSIX doesn't distinguish between an unmatched open-group and an
- unmatched close-group: both are REG_EPAREN. */
- if (ret == REG_ERPAREN) ret = REG_EPAREN;
-
- if (ret == REG_NOERROR && preg->fastmap)
- {
- /* Compute the fastmap now, since regexec cannot modify the pattern
- buffer. */
- if (re_compile_fastmap (preg) == -2)
- {
- /* Some error occurred while computing the fastmap, just forget
- about it. */
- free (preg->fastmap);
- preg->fastmap = NULL;
- }
- }
-
- return (int) ret;
-}
-#ifdef _LIBC
-weak_alias (__regcomp, regcomp)
-#endif
-
-
-/* regexec searches for a given pattern, specified by PREG, in the
- string STRING.
-
- If NMATCH is zero or REG_NOSUB was set in the cflags argument to
- `regcomp', we ignore PMATCH. Otherwise, we assume PMATCH has at
- least NMATCH elements, and we set them to the offsets of the
- corresponding matched substrings.
-
- EFLAGS specifies `execution flags' which affect matching: if
- REG_NOTBOL is set, then ^ does not match at the beginning of the
- string; if REG_NOTEOL is set, then $ does not match at the end.
-
- We return 0 if we find a match and REG_NOMATCH if not. */
-
-int
-regexec (const regex_t *preg, const char *string,
- size_t nmatch, regmatch_t pmatch[], int eflags)
-{
- int ret;
- struct re_registers regs;
- regex_t private_preg;
- int len = strlen (string);
- boolean want_reg_info = !preg->no_sub && nmatch > 0;
-
- private_preg = *preg;
-
- private_preg.not_bol = !!(eflags & REG_NOTBOL);
- private_preg.not_eol = !!(eflags & REG_NOTEOL);
-
- /* The user has told us exactly how many registers to return
- information about, via `nmatch'. We have to pass that on to the
- matching routines. */
- private_preg.regs_allocated = REGS_FIXED;
-
- if (want_reg_info)
- {
- regs.num_regs = nmatch;
- regs.start = TALLOC (nmatch * 2, regoff_t);
- if (regs.start == NULL)
- return (int) REG_NOMATCH;
- regs.end = regs.start + nmatch;
- }
-
- /* Perform the searching operation. */
- ret = re_search (&private_preg, string, len,
- /* start: */ 0, /* range: */ len,
- want_reg_info ? ®s : 0);
-
- /* Copy the register information to the POSIX structure. */
- if (want_reg_info)
- {
- if (ret >= 0)
- {
- unsigned r;
-
- for (r = 0; r < nmatch; r++)
- {
- pmatch[r].rm_so = regs.start[r];
- pmatch[r].rm_eo = regs.end[r];
- }
- }
-
- /* If we needed the temporary register info, free the space now. */
- free (regs.start);
- }
-
- /* We want zero return to mean success, unlike `re_search'. */
- return ret >= 0 ? (int) REG_NOERROR : (int) REG_NOMATCH;
-}
-#ifdef _LIBC
-weak_alias (__regexec, regexec)
-#endif
-
-
-/* Returns a message corresponding to an error code, ERRCODE, returned
- from either regcomp or regexec. We don't use PREG here. */
-
-size_t
-regerror (int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
-{
- const char *msg;
- size_t msg_size;
-
- if (errcode < 0
- || errcode >= (int) (sizeof (re_error_msgid_idx)
- / sizeof (re_error_msgid_idx[0])))
- /* Only error codes returned by the rest of the code should be passed
- to this routine. If we are given anything else, or if other regex
- code generates an invalid error code, then the program has a bug.
- Dump core so we can fix it. */
- abort ();
-
- msg = gettext (re_error_msgid + re_error_msgid_idx[errcode]);
-
- msg_size = strlen (msg) + 1; /* Includes the null. */
-
- if (errbuf_size != 0)
- {
- if (msg_size > errbuf_size)
- {
-#if defined HAVE_MEMPCPY || defined _LIBC
- *((char *) __mempcpy (errbuf, msg, errbuf_size - 1)) = '\0';
-#else
- memcpy (errbuf, msg, errbuf_size - 1);
- errbuf[errbuf_size - 1] = 0;
-#endif
- }
- else
- memcpy (errbuf, msg, msg_size);
- }
-
- return msg_size;
-}
-#ifdef _LIBC
-weak_alias (__regerror, regerror)
-#endif
-
-
-/* Free dynamically allocated space used by PREG. */
-
-void
-regfree (regex_t *preg)
-{
- if (preg->buffer != NULL)
- free (preg->buffer);
- preg->buffer = NULL;
-
- preg->allocated = 0;
- preg->used = 0;
-
- if (preg->fastmap != NULL)
- free (preg->fastmap);
- preg->fastmap = NULL;
- preg->fastmap_accurate = 0;
-
- if (preg->translate != NULL)
- free (preg->translate);
- preg->translate = NULL;
-}
-#ifdef _LIBC
-weak_alias (__regfree, regfree)
-#endif
-
-#endif /* not emacs */
-
-#endif /* not INSIDE_RECURSION */
-
-\f
-#undef STORE_NUMBER
-#undef STORE_NUMBER_AND_INCR
-#undef EXTRACT_NUMBER
-#undef EXTRACT_NUMBER_AND_INCR
-
-#undef DEBUG_PRINT_COMPILED_PATTERN
-#undef DEBUG_PRINT_DOUBLE_STRING
-
-#undef INIT_FAIL_STACK
-#undef RESET_FAIL_STACK
-#undef DOUBLE_FAIL_STACK
-#undef PUSH_PATTERN_OP
-#undef PUSH_FAILURE_POINTER
-#undef PUSH_FAILURE_INT
-#undef PUSH_FAILURE_ELT
-#undef POP_FAILURE_POINTER
-#undef POP_FAILURE_INT
-#undef POP_FAILURE_ELT
-#undef DEBUG_PUSH
-#undef DEBUG_POP
-#undef PUSH_FAILURE_POINT
-#undef POP_FAILURE_POINT
-
-#undef REG_UNSET_VALUE
-#undef REG_UNSET
-
-#undef PATFETCH
-#undef PATFETCH_RAW
-#undef PATUNFETCH
-#undef TRANSLATE
-
-#undef INIT_BUF_SIZE
-#undef GET_BUFFER_SPACE
-#undef BUF_PUSH
-#undef BUF_PUSH_2
-#undef BUF_PUSH_3
-#undef STORE_JUMP
-#undef STORE_JUMP2
-#undef INSERT_JUMP
-#undef INSERT_JUMP2
-#undef EXTEND_BUFFER
-#undef GET_UNSIGNED_NUMBER
-#undef FREE_STACK_RETURN
-
-# undef POINTER_TO_OFFSET
-# undef MATCHING_IN_FRST_STRING
-# undef PREFETCH
-# undef AT_STRINGS_BEG
-# undef AT_STRINGS_END
-# undef WORDCHAR_P
-# undef FREE_VAR
-# undef FREE_VARIABLES
-# undef NO_HIGHEST_ACTIVE_REG
-# undef NO_LOWEST_ACTIVE_REG
-
-# undef CHAR_T
-# undef UCHAR_T
-# undef COMPILED_BUFFER_VAR
-# undef OFFSET_ADDRESS_SIZE
-# undef CHAR_CLASS_SIZE
-# undef PREFIX
-# undef ARG_PREFIX
-# undef PUT_CHAR
-# undef BYTE
-# undef WCHAR
-
-# define DEFINED_ONCE
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