X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=lib%2Fstrftime.c;h=4e6407a409aa7533874fc8520b006cd452dc3ecb;hb=ea12546cdee0548bded92ecffcf257aa5b6a125f;hp=64c07646504b9da14323a3074bc98b1a428eea83;hpb=3a944dc2a194ef991f4f1b0570d154f3958f2f76;p=gnulib.git diff --git a/lib/strftime.c b/lib/strftime.c index 64c076465..4e6407a40 100644 --- a/lib/strftime.c +++ b/lib/strftime.c @@ -1,7 +1,7 @@ -/* Copyright (C) 1991, 92, 93, 94, 95, 96 Free Software Foundation, Inc. +/* Copyright (C) 1991,92,93,94,95,96,97,98 Free Software Foundation, Inc. - NOTE: The canonical source of this file is maintained with the GNU C - Library. Bugs can be reported to bug-glibc@prep.ai.mit.edu. + NOTE: The canonical source of this file is maintained with the GNU C Library. + Bugs can be reported to bug-glibc@prep.ai.mit.edu. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the @@ -14,13 +14,19 @@ GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software Foundation, - Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + along with this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, + USA. */ #ifdef HAVE_CONFIG_H # include #endif +/* Some systems need this in order to declare localtime_r properly. */ +#ifndef _REENTRANT +# define _REENTRANT 1 +#endif + #ifdef _LIBC # define HAVE_LIMITS_H 1 # define HAVE_MBLEN 1 @@ -28,12 +34,18 @@ # define HAVE_STRUCT_ERA_ENTRY 1 # define HAVE_TM_GMTOFF 1 # define HAVE_TM_ZONE 1 +# define HAVE_TZNAME 1 +# define HAVE_TZSET 1 # define MULTIBYTE_IS_FORMAT_SAFE 1 # define STDC_HEADERS 1 -# include # include "../locale/localeinfo.h" #endif +#if defined emacs && !defined HAVE_BCOPY +# define HAVE_MEMCPY 1 +#endif + +#include #include /* Some systems define `time_t' here. */ #ifdef TIME_WITH_SYS_TIME @@ -46,8 +58,7 @@ # include # endif #endif - -#if HAVE_TZNAME || defined __LIBC +#if HAVE_TZNAME extern char *tzname[]; #endif @@ -80,27 +91,41 @@ extern char *tzname[]; # include # include #else -# define memcpy(d, s, n) bcopy (s, d, n) +# ifndef HAVE_MEMCPY +# define memcpy(d, s, n) bcopy ((s), (d), (n)) +# endif #endif -#ifndef __P -#if defined (__GNUC__) || (defined (__STDC__) && __STDC__) -#define __P(args) args +#ifdef _LIBC +# define MEMPCPY(d, s, n) __mempcpy (d, s, n) #else -#define __P(args) () -#endif /* GCC. */ +# ifndef HAVE_MEMPCPY +# define MEMPCPY(d, s, n) ((void *) ((char *) memcpy (d, s, n) + (n))) +# endif +#endif + +#ifndef __P +# if defined (__GNUC__) || (defined (__STDC__) && __STDC__) +# define __P(args) args +# else +# define __P(args) () +# endif /* GCC. */ #endif /* Not __P. */ #ifndef PTR -#ifdef __STDC__ -#define PTR void * -#else -#define PTR char * -#endif +# ifdef __STDC__ +# define PTR void * +# else +# define PTR char * +# endif #endif #ifndef CHAR_BIT -#define CHAR_BIT 8 +# define CHAR_BIT 8 +#endif + +#ifndef NULL +# define NULL 0 #endif #define TYPE_SIGNED(t) ((t) -1 < 0) @@ -118,7 +143,7 @@ extern char *tzname[]; #ifndef __isleap /* Nonzero if YEAR is a leap year (every 4 years, except every 100th isn't, and every 400th is). */ -#define __isleap(year) \ +# define __isleap(year) \ ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) #endif @@ -126,11 +151,14 @@ extern char *tzname[]; #ifdef _LIBC # define gmtime_r __gmtime_r # define localtime_r __localtime_r +# define tzname __tzname +# define tzset __tzset #else # if ! HAVE_LOCALTIME_R # if ! HAVE_TM_GMTOFF /* Approximate gmtime_r as best we can in its absence. */ -#define gmtime_r my_gmtime_r +# undef gmtime_r +# define gmtime_r my_gmtime_r static struct tm *gmtime_r __P ((const time_t *, struct tm *)); static struct tm * gmtime_r (t, tp) @@ -146,7 +174,8 @@ gmtime_r (t, tp) # endif /* ! HAVE_TM_GMTOFF */ /* Approximate localtime_r as best we can in its absence. */ -#define localtime_r my_localtime_r +# undef localtime_r +# define localtime_r my_ftime_localtime_r static struct tm *localtime_r __P ((const time_t *, struct tm *)); static struct tm * localtime_r (t, tp) @@ -160,27 +189,127 @@ localtime_r (t, tp) return tp; } # endif /* ! HAVE_LOCALTIME_R */ -#endif /* ! defined (_LIBC) */ - +#endif /* ! defined _LIBC */ + + +#if !defined memset && !defined HAVE_MEMSET && !defined _LIBC +/* Some systems lack the `memset' function and we don't want to + introduce additional dependencies. */ +/* The SGI compiler reportedly barfs on the trailing null + if we use a string constant as the initializer. 28 June 1997, rms. */ +static const char spaces[16] = /* " " */ + { ' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ',' ' }; +static const char zeroes[16] = /* "0000000000000000" */ + { '0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0' }; + +# define memset_space(P, Len) \ + do { \ + int _len = (Len); \ + \ + do \ + { \ + int _this = _len > 16 ? 16 : _len; \ + (P) = MEMPCPY ((P), spaces, _this); \ + _len -= _this; \ + } \ + while (_len > 0); \ + } while (0) + +# define memset_zero(P, Len) \ + do { \ + int _len = (Len); \ + \ + do \ + { \ + int _this = _len > 16 ? 16 : _len; \ + (P) = MEMPCPY ((P), zeroes, _this); \ + _len -= _this; \ + } \ + while (_len > 0); \ + } while (0) +#else +# define memset_space(P, Len) (memset ((P), ' ', (Len)), (P) += (Len)) +# define memset_zero(P, Len) (memset ((P), '0', (Len)), (P) += (Len)) +#endif -#define add(n, f) \ +#define add(n, f) \ do \ { \ - i += (n); \ - if (i >= maxsize) \ + int _n = (n); \ + int _delta = width - _n; \ + int _incr = _n + (_delta > 0 ? _delta : 0); \ + if (i + _incr >= maxsize) \ return 0; \ - else \ - if (p) \ - { \ - f; \ - p += (n); \ - } \ + if (p) \ + { \ + if (_delta > 0) \ + { \ + if (pad == '0') \ + memset_zero (p, _delta); \ + else \ + memset_space (p, _delta); \ + } \ + f; \ + p += _n; \ + } \ + i += _incr; \ } while (0) -#define cpy(n, s) add ((n), memcpy((PTR) p, (PTR) (s), (n))) + +#define cpy(n, s) \ + add ((n), \ + if (to_lowcase) \ + memcpy_lowcase (p, (s), _n); \ + else if (to_uppcase) \ + memcpy_uppcase (p, (s), _n); \ + else \ + memcpy ((PTR) p, (PTR) (s), _n)) + + + +#ifdef _LIBC +# define TOUPPER(Ch) toupper (Ch) +# define TOLOWER(Ch) tolower (Ch) +#else +# define TOUPPER(Ch) (islower (Ch) ? toupper (Ch) : (Ch)) +# define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) +#endif +/* We don't use `isdigit' here since the locale dependent + interpretation is not what we want here. We only need to accept + the arabic digits in the ASCII range. One day there is perhaps a + more reliable way to accept other sets of digits. */ +#define ISDIGIT(Ch) ((unsigned int) (Ch) - '0' <= 9) + +static char *memcpy_lowcase __P ((char *dest, const char *src, size_t len)); + +static char * +memcpy_lowcase (dest, src, len) + char *dest; + const char *src; + size_t len; +{ + while (len-- > 0) + dest[len] = TOLOWER ((unsigned char) src[len]); + return dest; +} + +static char *memcpy_uppcase __P ((char *dest, const char *src, size_t len)); + +static char * +memcpy_uppcase (dest, src, len) + char *dest; + const char *src; + size_t len; +{ + while (len-- > 0) + dest[len] = TOUPPER ((unsigned char) src[len]); + return dest; +} + #if ! HAVE_TM_GMTOFF /* Yield the difference between *A and *B, measured in seconds, ignoring leap seconds. */ +# define tm_diff ftime_tm_diff static int tm_diff __P ((const struct tm *, const struct tm *)); static int tm_diff (a, b) @@ -217,7 +346,7 @@ tm_diff (a, b) #define YDAY_MINIMUM (-366) static int iso_week_days __P ((int, int)); #ifdef __GNUC__ -inline +__inline__ #endif static int iso_week_days (yday, wday) @@ -232,7 +361,7 @@ iso_week_days (yday, wday) } -#ifndef _NL_CURRENT +#if !(defined _NL_CURRENT || HAVE_STRFTIME) static char const weekday_name[][10] = { "Sunday", "Monday", "Tuesday", "Wednesday", @@ -245,6 +374,43 @@ static char const month_name[][10] = }; #endif + +#ifdef emacs +# define my_strftime emacs_strftime + /* Emacs 20.2 uses `-Dstrftime=emacs_strftime' when compiling, + because that's how strftime used to be configured. + Undo this, since it gets in the way of accessing the underlying strftime, + which is needed for things like %Ec in Solaris. + The following two lines can be removed once Emacs stops compiling with + `-Dstrftime=emacs_strftime'. */ +# undef strftime +size_t strftime __P ((char *, size_t, const char *, const struct tm *)); +#else +# define my_strftime strftime +#endif + +#if !defined _LIBC && HAVE_TZNAME && HAVE_TZSET + /* Solaris 2.5 tzset sometimes modifies the storage returned by localtime. + Work around this bug by copying *tp before it might be munged. */ + size_t _strftime_copytm __P ((char *, size_t, const char *, + const struct tm *)); + size_t + my_strftime (s, maxsize, format, tp) + char *s; + size_t maxsize; + const char *format; + const struct tm *tp; + { + struct tm tmcopy; + tmcopy = *tp; + return _strftime_copytm (s, maxsize, format, &tmcopy); + } +# undef my_strftime +# define my_strftime(S, Maxsize, Format, Tp) \ + _strftime_copytm (S, Maxsize, Format, Tp) +#endif + + /* Write information from TP into S according to the format string FORMAT, writing no more that MAXSIZE characters (including the terminating '\0') and returning number of @@ -252,11 +418,11 @@ static char const month_name[][10] = anywhere, so to determine how many characters would be written, use NULL for S and (size_t) UINT_MAX for MAXSIZE. */ size_t -strftime (s, maxsize, format, tp) +my_strftime (s, maxsize, format, tp) char *s; size_t maxsize; const char *format; - register const struct tm *tp; + const struct tm *tp; { int hour12 = tp->tm_hour; #ifdef _NL_CURRENT @@ -270,6 +436,7 @@ strftime (s, maxsize, format, tp) size_t am_len = strlen (a_month); size_t ap_len = strlen (ampm); #else +# if !HAVE_STRFTIME const char *const f_wkday = weekday_name[tp->tm_wday]; const char *const f_month = month_name[tp->tm_mon]; const char *const a_wkday = f_wkday; @@ -278,20 +445,36 @@ strftime (s, maxsize, format, tp) size_t aw_len = 3; size_t am_len = 3; size_t ap_len = 2; +# endif #endif +#if defined _NL_CURRENT || !HAVE_STRFTIME size_t wkday_len = strlen (f_wkday); size_t month_len = strlen (f_month); +#endif const char *zone; size_t zonelen; - register size_t i = 0; - register char *p = s; - register const char *f; + size_t i = 0; + char *p = s; + const char *f; - zone = 0; + zone = NULL; #if HAVE_TM_ZONE + /* The POSIX test suite assumes that setting + the environment variable TZ to a new value before calling strftime() + will influence the result (the %Z format) even if the information in + TP is computed with a totally different time zone. + This is bogus: though POSIX allows bad behavior like this, + POSIX does not require it. Do the right thing instead. */ zone = (const char *) tp->tm_zone; #endif #if HAVE_TZNAME + /* POSIX.1 8.1.1 requires that whenever strftime() is called, the + time zone names contained in the external variable `tzname' shall + be set as if the tzset() function had been called. */ +# if HAVE_TZSET + tzset (); +# endif + if (!(zone && *zone) && tp->tm_isdst >= 0) zone = tzname[tp->tm_isdst]; #endif @@ -307,7 +490,7 @@ strftime (s, maxsize, format, tp) for (f = format; *f != '\0'; ++f) { - int pad; /* Padding for number ('-', '_', or 0). */ + int pad = 0; /* Padding for number ('-', '_', or 0). */ int modifier; /* Field modifier ('E', 'O', or 0). */ int digits; /* Max digits for numeric format. */ int number_value; /* Numeric value to be printed. */ @@ -317,6 +500,11 @@ strftime (s, maxsize, format, tp) char buf[1 + (sizeof (int) < sizeof (time_t) ? INT_STRLEN_BOUND (time_t) : INT_STRLEN_BOUND (int))]; + int width = -1; + int to_lowcase = 0; + int to_uppcase = 0; + int change_case = 0; + int format_char; #if DO_MULTIBYTE @@ -391,20 +579,45 @@ strftime (s, maxsize, format, tp) #endif /* ! DO_MULTIBYTE */ - /* Check for flags that can modify a number format. */ - ++f; - switch (*f) + /* Check for flags that can modify a format. */ + while (1) { - case '_': - case '-': - pad = *f++; - break; + switch (*++f) + { + /* This influences the number formats. */ + case '_': + case '-': + case '0': + pad = *f; + continue; - default: - pad = 0; + /* This changes textual output. */ + case '^': + to_uppcase = 1; + continue; + case '#': + change_case = 1; + continue; + + default: + break; + } break; } + /* As a GNU extension we allow to specify the field width. */ + if (ISDIGIT (*f)) + { + width = 0; + do + { + width *= 10; + width += *f - '0'; + ++f; + } + while (ISDIGIT (*f)); + } + /* Check for modifiers. */ switch (*f) { @@ -419,12 +632,15 @@ strftime (s, maxsize, format, tp) } /* Now do the specified format. */ - switch (*f) + format_char = *f; + switch (format_char) { #define DO_NUMBER(d, v) \ - digits = d; number_value = v; goto do_number + digits = width == -1 ? d : width; \ + number_value = v; goto do_number #define DO_NUMBER_SPACEPAD(d, v) \ - digits = d; number_value = v; goto do_number_spacepad + digits = width == -1 ? d : width; \ + number_value = v; goto do_number_spacepad case '%': if (modifier != 0) @@ -435,27 +651,58 @@ strftime (s, maxsize, format, tp) case 'a': if (modifier != 0) goto bad_format; + if (change_case) + { + to_uppcase = 1; + to_lowcase = 0; + } +#if defined _NL_CURRENT || !HAVE_STRFTIME cpy (aw_len, a_wkday); break; +#else + goto underlying_strftime; +#endif case 'A': if (modifier != 0) goto bad_format; + if (change_case) + { + to_uppcase = 1; + to_lowcase = 0; + } +#if defined _NL_CURRENT || !HAVE_STRFTIME cpy (wkday_len, f_wkday); break; +#else + goto underlying_strftime; +#endif case 'b': case 'h': /* POSIX.2 extension. */ if (modifier != 0) goto bad_format; +#if defined _NL_CURRENT || !HAVE_STRFTIME cpy (am_len, a_month); break; +#else + goto underlying_strftime; +#endif case 'B': if (modifier != 0) goto bad_format; + if (change_case) + { + to_uppcase = 1; + to_lowcase = 0; + } +#if defined _NL_CURRENT || !HAVE_STRFTIME cpy (month_len, f_month); break; +#else + goto underlying_strftime; +#endif case 'c': if (modifier == 'O') @@ -465,24 +712,58 @@ strftime (s, maxsize, format, tp) && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT)) != '\0')) subfmt = _NL_CURRENT (LC_TIME, D_T_FMT); #else +# if HAVE_STRFTIME + goto underlying_strftime; +# else subfmt = "%a %b %e %H:%M:%S %Y"; +# endif #endif subformat: { - size_t len = strftime (p, maxsize - i, subfmt, tp); + char *old_start = p; + size_t len = my_strftime (NULL, maxsize - i, subfmt, tp); if (len == 0 && *subfmt) return 0; - add (len, ;); + add (len, my_strftime (p, maxsize - i, subfmt, tp)); + + if (to_uppcase) + while (old_start < p) + { + *old_start = TOUPPER ((unsigned char) *old_start); + ++old_start; + } } break; +#if HAVE_STRFTIME && ! (defined _NL_CURRENT && HAVE_STRUCT_ERA_ENTRY) + underlying_strftime: + { + /* The relevant information is available only via the + underlying strftime implementation, so use that. */ + char ufmt[4]; + char *u = ufmt; + char ubuf[1024]; /* enough for any single format in practice */ + size_t len; + *u++ = '%'; + if (modifier != 0) + *u++ = modifier; + *u++ = format_char; + *u = '\0'; + len = strftime (ubuf, sizeof ubuf, ufmt, tp); + if (len == 0) + return 0; + cpy (len, ubuf); + } + break; +#endif + case 'C': /* POSIX.2 extension. */ if (modifier == 'O') goto bad_format; -#if HAVE_STRUCT_ERA_ENTRY if (modifier == 'E') { +#if HAVE_STRUCT_ERA_ENTRY struct era_entry *era = _nl_get_era_entry (tp); if (era) { @@ -490,8 +771,13 @@ strftime (s, maxsize, format, tp) cpy (len, era->name_fmt); break; } - } +#else +# if HAVE_STRFTIME + goto underlying_strftime; +# endif #endif + } + { int year = tp->tm_year + TM_YEAR_BASE; DO_NUMBER (1, year / 100 - (year % 100 < 0)); @@ -505,8 +791,13 @@ strftime (s, maxsize, format, tp) && *(subfmt = _NL_CURRENT (LC_TIME, ERA_D_FMT)) != '\0')) subfmt = _NL_CURRENT (LC_TIME, D_FMT); goto subformat; -#endif +#else +# if HAVE_STRFTIME + goto underlying_strftime; +# else /* Fall through. */ +# endif +#endif case 'D': /* POSIX.2 extension. */ if (modifier != 0) goto bad_format; @@ -529,15 +820,16 @@ strftime (s, maxsize, format, tp) jump to one of these two labels. */ do_number_spacepad: - /* Force `_' flag. */ - pad = '_'; + /* Force `_' flag unless overwritten by `0' flag. */ + if (pad != '0') + pad = '_'; do_number: /* Format the number according to the MODIFIER flag. */ -#ifdef _NL_CURRENT if (modifier == 'O' && 0 <= number_value) { +#ifdef _NL_CURRENT /* Get the locale specific alternate representation of the number NUMBER_VALUE. If none exist NULL is returned. */ const char *cp = _nl_get_alt_digit (number_value); @@ -551,8 +843,12 @@ strftime (s, maxsize, format, tp) break; } } - } +#else +# if HAVE_STRFTIME + goto underlying_strftime; +# endif #endif + } { unsigned int u = number_value; @@ -593,6 +889,11 @@ strftime (s, maxsize, format, tp) cpy (buf + sizeof (buf) - bufp, bufp); break; + case 'F': + if (modifier != 0) + goto bad_format; + subfmt = "%Y-%m-%d"; + goto subformat; case 'H': if (modifier == 'E') @@ -640,9 +941,25 @@ strftime (s, maxsize, format, tp) add (1, *p = '\n'); break; + case 'P': + to_lowcase = 1; +#if !defined _NL_CURRENT && HAVE_STRFTIME + format_char = 'p'; +#endif + /* FALLTHROUGH */ + case 'p': + if (change_case) + { + to_uppcase = 0; + to_lowcase = 1; + } +#if defined _NL_CURRENT || !HAVE_STRFTIME cpy (ap_len, ampm); break; +#else + goto underlying_strftime; +#endif case 'R': /* GNU extension. */ subfmt = "%H:%M"; @@ -708,8 +1025,13 @@ strftime (s, maxsize, format, tp) && *(subfmt = _NL_CURRENT (LC_TIME, ERA_T_FMT)) != '\0')) subfmt = _NL_CURRENT (LC_TIME, T_FMT); goto subformat; -#endif +#else +# if HAVE_STRFTIME + goto underlying_strftime; +# else /* Fall through. */ +# endif +#endif case 'T': /* POSIX.2 extension. */ subfmt = "%H:%M:%S"; goto subformat; @@ -718,6 +1040,7 @@ strftime (s, maxsize, format, tp) add (1, *p = '\t'); break; + case 'f': case 'u': /* POSIX.2 extension. */ DO_NUMBER (1, (tp->tm_wday - 1 + 7) % 7 + 1); @@ -781,26 +1104,30 @@ strftime (s, maxsize, format, tp) DO_NUMBER (1, tp->tm_wday); case 'Y': -#if HAVE_STRUCT_ERA_ENTRY if (modifier == 'E') { +#if HAVE_STRUCT_ERA_ENTRY struct era_entry *era = _nl_get_era_entry (tp); if (era) { subfmt = strchr (era->name_fmt, '\0') + 1; goto subformat; } - } +#else +# if HAVE_STRFTIME + goto underlying_strftime; +# endif #endif + } if (modifier == 'O') goto bad_format; else DO_NUMBER (1, tp->tm_year + TM_YEAR_BASE); case 'y': -#if HAVE_STRUCT_ERA_ENTRY if (modifier == 'E') { +#if HAVE_STRUCT_ERA_ENTRY struct era_entry *era = _nl_get_era_entry (tp); if (era) { @@ -808,12 +1135,21 @@ strftime (s, maxsize, format, tp) DO_NUMBER (1, (era->offset + (era->direction == '-' ? -delta : delta))); } - } +#else +# if HAVE_STRFTIME + goto underlying_strftime; +# endif #endif + } DO_NUMBER (2, (tp->tm_year % 100 + 100) % 100); case 'Z': - cpy(zonelen, zone); + if (change_case) + { + to_uppcase = 0; + to_lowcase = 1; + } + cpy (zonelen, zone); break; case 'z': /* GNU extension. */