tweak from FSF

[gnulib.git] / lib / regex.c

diff --git a/lib/regex.c b/lib/regex.c
index 8aefe49..d16bd60 100644 (file)
--- a/lib/regex.c
+++ b/lib/regex.c
@@ -49,11 +49,14 @@
 # include <sys/types.h>
 #endif
 
+#define WIDE_CHAR_SUPPORT \
+  defined _LIBC || (HAVE_WCTYPE_H && HAVE_WCHAR_H && HAVE_BTOWC)
+
 /* For platform which support the ISO C amendement 1 functionality we
    support user defined character classes.  */
-#if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
-# include <wctype.h>
+#if WIDE_CHAR_SUPPORT
 # include <wchar.h>
+# include <wctype.h>
 #endif
 
 /* This is for other GNU distributions with internationalized messages.  */
@@ -194,6 +197,7 @@ init_syntax_once ()
    Defining isascii to 1 should let any compiler worth its salt
    eliminate the && through constant folding."  */
 
+#undef ISASCII
 #if defined STDC_HEADERS || (!defined isascii && !defined HAVE_ISASCII)
 # define ISASCII(c) 1
 #else
@@ -211,6 +215,7 @@ init_syntax_once ()
 # define ISGRAPH(c) (ISASCII (c) && isprint (c) && !isspace (c))
 #endif
 
+#undef ISPRINT
 #define ISPRINT(c) (ISASCII (c) && isprint (c))
 #define ISDIGIT(c) (ISASCII (c) && isdigit (c))
 #define ISALNUM(c) (ISASCII (c) && isalnum (c))
@@ -1201,8 +1206,8 @@ typedef struct
    if we ever fail back to it.
 
    Requires variables fail_stack, regstart, regend, reg_info, and
-   num_regs be declared.  DOUBLE_FAIL_STACK requires `destination' be
-   declared.
+   num_regs_pushed be declared.  DOUBLE_FAIL_STACK requires `destination'
+   be declared.
 
    Does `return FAILURE_CODE' if runs out of memory.  */
 
@@ -1683,7 +1688,7 @@ typedef struct
        }                                                               \
     }
 
-#if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
+#if 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
@@ -2183,7 +2188,7 @@ regex_compile (pattern, size, syntax, bufp)
                        the leading `:' and `[' (but set bits for them).  */
                     if (c == ':' && *p == ']')
                       {
-#if defined _LIBC || (defined HAVE_WCTYPE_H && defined HAVE_WCHAR_H)
+#if WIDE_CHAR_SUPPORT
                         boolean is_lower = STREQ (str, "lower");
                         boolean is_upper = STREQ (str, "upper");
                        wctype_t wt;
@@ -3092,8 +3097,6 @@ re_compile_fastmap (bufp)
 #ifndef REGEX_MALLOC
   char *destination;
 #endif
-  /* We don't push any register information onto the failure stack.  */
-  unsigned num_regs = 0;
 
   register char *fastmap = bufp->fastmap;
   unsigned char *pattern = bufp->buffer;