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983 lines
23 KiB
983 lines
23 KiB
/* Convert a string representation of time to a time value. |
|
Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. |
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This file is part of the GNU C Library. |
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. |
|
|
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The GNU C Library is free software; you can redistribute it and/or |
|
modify it under the terms of the GNU Library General Public License as |
|
published by the Free Software Foundation; either version 2 of the |
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License, or (at your option) any later version. |
|
|
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The GNU C Library is distributed in the hope that it will be useful, |
|
but WITHOUT ANY WARRANTY; without even the implied warranty of |
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Library General Public License for more details. |
|
|
|
You should have received a copy of the GNU Library General Public |
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License along with the GNU C Library; see the file COPYING.LIB. If not, |
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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Boston, MA 02111-1307, USA. */ |
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|
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/* XXX This version of the implementation is not really complete. |
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Some of the fields cannot add information alone. But if seeing |
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some of them in the same format (such as year, week and weekday) |
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this is enough information for determining the date. */ |
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|
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#ifdef HAVE_CONFIG_H |
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# include "config.h" |
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#endif |
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|
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#include <ctype.h> |
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#include <limits.h> |
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#include <string.h> |
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#include <time.h> |
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|
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#ifdef _LIBC |
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# include "../locale/localeinfo.h" |
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#endif |
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|
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#include "strptime.h" |
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#include "localtime_r.h" |
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|
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#ifndef __P |
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# if defined (__GNUC__) || (defined (__STDC__) && __STDC__) |
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# define __P(args) args |
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# else |
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# define __P(args) () |
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# endif /* GCC. */ |
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#endif /* Not __P. */ |
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|
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#define match_char(ch1, ch2) if (ch1 != ch2) return NULL |
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#if defined __GNUC__ && __GNUC__ >= 2 |
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# define match_string(cs1, s2) \ |
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({ size_t len = strlen (cs1); \ |
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int result = strncasecmp ((cs1), (s2), len) == 0; \ |
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if (result) (s2) += len; \ |
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result; }) |
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#else |
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/* Oh come on. Get a reasonable compiler. */ |
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# define match_string(cs1, s2) \ |
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(strncasecmp ((cs1), (s2), strlen (cs1)) ? 0 : ((s2) += strlen (cs1), 1)) |
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#endif |
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/* We intentionally do not use isdigit() for testing because this will |
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lead to problems with the wide character version. */ |
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#define get_number(from, to, n) \ |
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do { \ |
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int __n = n; \ |
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val = 0; \ |
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while (*rp == ' ') \ |
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++rp; \ |
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if (*rp < '0' || *rp > '9') \ |
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return NULL; \ |
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do { \ |
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val *= 10; \ |
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val += *rp++ - '0'; \ |
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} while (--__n > 0 && val * 10 <= to && *rp >= '0' && *rp <= '9'); \ |
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if (val < from || val > to) \ |
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return NULL; \ |
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} while (0) |
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#ifdef _NL_CURRENT |
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# define get_alt_number(from, to, n) \ |
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({ \ |
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__label__ do_normal; \ |
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if (*decided != raw) \ |
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{ \ |
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const char *alts = _NL_CURRENT (LC_TIME, ALT_DIGITS); \ |
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int __n = n; \ |
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int any = 0; \ |
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while (*rp == ' ') \ |
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++rp; \ |
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val = 0; \ |
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do { \ |
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val *= 10; \ |
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while (*alts != '\0') \ |
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{ \ |
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size_t len = strlen (alts); \ |
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if (strncasecmp (alts, rp, len) == 0) \ |
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break; \ |
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alts += len + 1; \ |
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++val; \ |
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} \ |
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if (*alts == '\0') \ |
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{ \ |
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if (*decided == not && ! any) \ |
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goto do_normal; \ |
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/* If we haven't read anything it's an error. */ \ |
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if (! any) \ |
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return NULL; \ |
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/* Correct the premature multiplication. */ \ |
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val /= 10; \ |
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break; \ |
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} \ |
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else \ |
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*decided = loc; \ |
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} while (--__n > 0 && val * 10 <= to); \ |
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if (val < from || val > to) \ |
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return NULL; \ |
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} \ |
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else \ |
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{ \ |
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do_normal: \ |
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get_number (from, to, n); \ |
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} \ |
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0; \ |
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}) |
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#else |
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# define get_alt_number(from, to, n) \ |
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/* We don't have the alternate representation. */ \ |
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get_number(from, to, n) |
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#endif |
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#define recursive(new_fmt) \ |
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(*(new_fmt) != '\0' \ |
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&& (rp = strptime_internal (rp, (new_fmt), tm, decided, era_cnt)) != NULL) |
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|
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#ifdef _LIBC |
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/* This is defined in locale/C-time.c in the GNU libc. */ |
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extern const struct locale_data _nl_C_LC_TIME; |
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extern const unsigned short int __mon_yday[2][13]; |
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|
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# define weekday_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (DAY_1)].string) |
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# define ab_weekday_name \ |
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(&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABDAY_1)].string) |
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# define month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (MON_1)].string) |
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# define ab_month_name (&_nl_C_LC_TIME.values[_NL_ITEM_INDEX (ABMON_1)].string) |
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# define HERE_D_T_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (D_T_FMT)].string) |
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# define HERE_D_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (D_FMT)].string) |
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# define HERE_AM_STR (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (AM_STR)].string) |
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# define HERE_PM_STR (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (PM_STR)].string) |
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# define HERE_T_FMT_AMPM \ |
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(_nl_C_LC_TIME.values[_NL_ITEM_INDEX (T_FMT_AMPM)].string) |
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# define HERE_T_FMT (_nl_C_LC_TIME.values[_NL_ITEM_INDEX (T_FMT)].string) |
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|
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# define strncasecmp(s1, s2, n) __strncasecmp (s1, s2, n) |
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#else |
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static char const weekday_name[][10] = |
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{ |
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"Sunday", "Monday", "Tuesday", "Wednesday", |
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"Thursday", "Friday", "Saturday" |
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}; |
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static char const ab_weekday_name[][4] = |
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{ |
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"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" |
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}; |
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static char const month_name[][10] = |
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{ |
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"January", "February", "March", "April", "May", "June", |
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"July", "August", "September", "October", "November", "December" |
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}; |
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static char const ab_month_name[][4] = |
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{ |
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"Jan", "Feb", "Mar", "Apr", "May", "Jun", |
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"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" |
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}; |
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# define HERE_D_T_FMT "%a %b %e %H:%M:%S %Y" |
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# define HERE_D_FMT "%m/%d/%y" |
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# define HERE_AM_STR "AM" |
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# define HERE_PM_STR "PM" |
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# define HERE_T_FMT_AMPM "%I:%M:%S %p" |
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# define HERE_T_FMT "%H:%M:%S" |
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|
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const unsigned short int __mon_yday[2][13] = |
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{ |
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/* Normal years. */ |
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{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 }, |
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/* Leap years. */ |
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{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 } |
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}; |
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#endif |
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|
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/* Status of lookup: do we use the locale data or the raw data? */ |
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enum locale_status { not, loc, raw }; |
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|
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|
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#ifndef __isleap |
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/* Nonzero if YEAR is a leap year (every 4 years, |
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except every 100th isn't, and every 400th is). */ |
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# define __isleap(year) \ |
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((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0)) |
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#endif |
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|
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/* Compute the day of the week. */ |
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static void |
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day_of_the_week (struct tm *tm) |
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{ |
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/* We know that January 1st 1970 was a Thursday (= 4). Compute the |
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the difference between this data in the one on TM and so determine |
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the weekday. */ |
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int corr_year = 1900 + tm->tm_year - (tm->tm_mon < 2); |
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int wday = (-473 |
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+ (365 * (tm->tm_year - 70)) |
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+ (corr_year / 4) |
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- ((corr_year / 4) / 25) + ((corr_year / 4) % 25 < 0) |
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+ (((corr_year / 4) / 25) / 4) |
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+ __mon_yday[0][tm->tm_mon] |
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+ tm->tm_mday - 1); |
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tm->tm_wday = ((wday % 7) + 7) % 7; |
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} |
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|
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/* Compute the day of the year. */ |
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static void |
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day_of_the_year (struct tm *tm) |
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{ |
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tm->tm_yday = (__mon_yday[__isleap (1900 + tm->tm_year)][tm->tm_mon] |
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+ (tm->tm_mday - 1)); |
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} |
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|
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static char * |
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#ifdef _LIBC |
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internal_function |
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#endif |
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strptime_internal __P ((const char *rp, const char *fmt, struct tm *tm, |
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enum locale_status *decided, int era_cnt)); |
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|
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static char * |
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#ifdef _LIBC |
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internal_function |
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#endif |
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strptime_internal (rp, fmt, tm, decided, era_cnt) |
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const char *rp; |
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const char *fmt; |
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struct tm *tm; |
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enum locale_status *decided; |
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int era_cnt; |
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{ |
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const char *rp_backup; |
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int cnt; |
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size_t val; |
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int have_I, is_pm; |
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int century, want_century; |
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int want_era; |
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int have_wday, want_xday; |
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int have_yday; |
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int have_mon, have_mday; |
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#ifdef _NL_CURRENT |
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size_t num_eras; |
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#endif |
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struct era_entry *era; |
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|
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have_I = is_pm = 0; |
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century = -1; |
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want_century = 0; |
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want_era = 0; |
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era = NULL; |
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|
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have_wday = want_xday = have_yday = have_mon = have_mday = 0; |
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|
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while (*fmt != '\0') |
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{ |
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/* A white space in the format string matches 0 more or white |
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space in the input string. */ |
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if (isspace (*fmt)) |
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{ |
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while (isspace (*rp)) |
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++rp; |
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++fmt; |
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continue; |
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} |
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|
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/* Any character but `%' must be matched by the same character |
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in the iput string. */ |
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if (*fmt != '%') |
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{ |
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match_char (*fmt++, *rp++); |
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continue; |
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} |
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|
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++fmt; |
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#ifndef _NL_CURRENT |
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/* We need this for handling the `E' modifier. */ |
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start_over: |
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#endif |
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|
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/* Make back up of current processing pointer. */ |
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rp_backup = rp; |
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|
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switch (*fmt++) |
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{ |
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case '%': |
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/* Match the `%' character itself. */ |
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match_char ('%', *rp++); |
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break; |
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case 'a': |
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case 'A': |
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/* Match day of week. */ |
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for (cnt = 0; cnt < 7; ++cnt) |
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{ |
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#ifdef _NL_CURRENT |
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if (*decided !=raw) |
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{ |
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if (match_string (_NL_CURRENT (LC_TIME, DAY_1 + cnt), rp)) |
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{ |
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if (*decided == not |
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&& strcmp (_NL_CURRENT (LC_TIME, DAY_1 + cnt), |
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weekday_name[cnt])) |
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*decided = loc; |
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break; |
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} |
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if (match_string (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), rp)) |
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{ |
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if (*decided == not |
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&& strcmp (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), |
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ab_weekday_name[cnt])) |
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*decided = loc; |
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break; |
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} |
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} |
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#endif |
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if (*decided != loc |
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&& (match_string (weekday_name[cnt], rp) |
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|| match_string (ab_weekday_name[cnt], rp))) |
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{ |
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*decided = raw; |
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break; |
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} |
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} |
|
if (cnt == 7) |
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/* Does not match a weekday name. */ |
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return NULL; |
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tm->tm_wday = cnt; |
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have_wday = 1; |
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break; |
|
case 'b': |
|
case 'B': |
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case 'h': |
|
/* Match month name. */ |
|
for (cnt = 0; cnt < 12; ++cnt) |
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{ |
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#ifdef _NL_CURRENT |
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if (*decided !=raw) |
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{ |
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if (match_string (_NL_CURRENT (LC_TIME, MON_1 + cnt), rp)) |
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{ |
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if (*decided == not |
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&& strcmp (_NL_CURRENT (LC_TIME, MON_1 + cnt), |
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month_name[cnt])) |
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*decided = loc; |
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break; |
|
} |
|
if (match_string (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), rp)) |
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{ |
|
if (*decided == not |
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&& strcmp (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), |
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ab_month_name[cnt])) |
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*decided = loc; |
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break; |
|
} |
|
} |
|
#endif |
|
if (match_string (month_name[cnt], rp) |
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|| match_string (ab_month_name[cnt], rp)) |
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{ |
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*decided = raw; |
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break; |
|
} |
|
} |
|
if (cnt == 12) |
|
/* Does not match a month name. */ |
|
return NULL; |
|
tm->tm_mon = cnt; |
|
want_xday = 1; |
|
break; |
|
case 'c': |
|
/* Match locale's date and time format. */ |
|
#ifdef _NL_CURRENT |
|
if (*decided != raw) |
|
{ |
|
if (!recursive (_NL_CURRENT (LC_TIME, D_T_FMT))) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (*decided == not && |
|
strcmp (_NL_CURRENT (LC_TIME, D_T_FMT), HERE_D_T_FMT)) |
|
*decided = loc; |
|
want_xday = 1; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
#endif |
|
if (!recursive (HERE_D_T_FMT)) |
|
return NULL; |
|
want_xday = 1; |
|
break; |
|
case 'C': |
|
/* Match century number. */ |
|
#ifdef _NL_CURRENT |
|
match_century: |
|
#endif |
|
get_number (0, 99, 2); |
|
century = val; |
|
want_xday = 1; |
|
break; |
|
case 'd': |
|
case 'e': |
|
/* Match day of month. */ |
|
get_number (1, 31, 2); |
|
tm->tm_mday = val; |
|
have_mday = 1; |
|
want_xday = 1; |
|
break; |
|
case 'F': |
|
if (!recursive ("%Y-%m-%d")) |
|
return NULL; |
|
want_xday = 1; |
|
break; |
|
case 'x': |
|
#ifdef _NL_CURRENT |
|
if (*decided != raw) |
|
{ |
|
if (!recursive (_NL_CURRENT (LC_TIME, D_FMT))) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (*decided == not |
|
&& strcmp (_NL_CURRENT (LC_TIME, D_FMT), HERE_D_FMT)) |
|
*decided = loc; |
|
want_xday = 1; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
#endif |
|
/* Fall through. */ |
|
case 'D': |
|
/* Match standard day format. */ |
|
if (!recursive (HERE_D_FMT)) |
|
return NULL; |
|
want_xday = 1; |
|
break; |
|
case 'k': |
|
case 'H': |
|
/* Match hour in 24-hour clock. */ |
|
get_number (0, 23, 2); |
|
tm->tm_hour = val; |
|
have_I = 0; |
|
break; |
|
case 'I': |
|
/* Match hour in 12-hour clock. */ |
|
get_number (1, 12, 2); |
|
tm->tm_hour = val % 12; |
|
have_I = 1; |
|
break; |
|
case 'j': |
|
/* Match day number of year. */ |
|
get_number (1, 366, 3); |
|
tm->tm_yday = val - 1; |
|
have_yday = 1; |
|
break; |
|
case 'm': |
|
/* Match number of month. */ |
|
get_number (1, 12, 2); |
|
tm->tm_mon = val - 1; |
|
have_mon = 1; |
|
want_xday = 1; |
|
break; |
|
case 'M': |
|
/* Match minute. */ |
|
get_number (0, 59, 2); |
|
tm->tm_min = val; |
|
break; |
|
case 'n': |
|
case 't': |
|
/* Match any white space. */ |
|
while (isspace (*rp)) |
|
++rp; |
|
break; |
|
case 'p': |
|
/* Match locale's equivalent of AM/PM. */ |
|
#ifdef _NL_CURRENT |
|
if (*decided != raw) |
|
{ |
|
if (match_string (_NL_CURRENT (LC_TIME, AM_STR), rp)) |
|
{ |
|
if (strcmp (_NL_CURRENT (LC_TIME, AM_STR), HERE_AM_STR)) |
|
*decided = loc; |
|
break; |
|
} |
|
if (match_string (_NL_CURRENT (LC_TIME, PM_STR), rp)) |
|
{ |
|
if (strcmp (_NL_CURRENT (LC_TIME, PM_STR), HERE_PM_STR)) |
|
*decided = loc; |
|
is_pm = 1; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
#endif |
|
if (!match_string (HERE_AM_STR, rp)) |
|
if (match_string (HERE_PM_STR, rp)) |
|
is_pm = 1; |
|
else |
|
return NULL; |
|
break; |
|
case 'r': |
|
#ifdef _NL_CURRENT |
|
if (*decided != raw) |
|
{ |
|
if (!recursive (_NL_CURRENT (LC_TIME, T_FMT_AMPM))) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (*decided == not && |
|
strcmp (_NL_CURRENT (LC_TIME, T_FMT_AMPM), |
|
HERE_T_FMT_AMPM)) |
|
*decided = loc; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
#endif |
|
if (!recursive (HERE_T_FMT_AMPM)) |
|
return NULL; |
|
break; |
|
case 'R': |
|
if (!recursive ("%H:%M")) |
|
return NULL; |
|
break; |
|
case 's': |
|
{ |
|
/* The number of seconds may be very high so we cannot use |
|
the `get_number' macro. Instead read the number |
|
character for character and construct the result while |
|
doing this. */ |
|
time_t secs = 0; |
|
if (*rp < '0' || *rp > '9') |
|
/* We need at least one digit. */ |
|
return NULL; |
|
|
|
do |
|
{ |
|
secs *= 10; |
|
secs += *rp++ - '0'; |
|
} |
|
while (*rp >= '0' && *rp <= '9'); |
|
|
|
if (localtime_r (&secs, tm) == NULL) |
|
/* Error in function. */ |
|
return NULL; |
|
} |
|
break; |
|
case 'S': |
|
get_number (0, 61, 2); |
|
tm->tm_sec = val; |
|
break; |
|
case 'X': |
|
#ifdef _NL_CURRENT |
|
if (*decided != raw) |
|
{ |
|
if (!recursive (_NL_CURRENT (LC_TIME, T_FMT))) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (strcmp (_NL_CURRENT (LC_TIME, T_FMT), HERE_T_FMT)) |
|
*decided = loc; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
#endif |
|
/* Fall through. */ |
|
case 'T': |
|
if (!recursive (HERE_T_FMT)) |
|
return NULL; |
|
break; |
|
case 'u': |
|
get_number (1, 7, 1); |
|
tm->tm_wday = val % 7; |
|
have_wday = 1; |
|
break; |
|
case 'g': |
|
get_number (0, 99, 2); |
|
/* XXX This cannot determine any field in TM. */ |
|
break; |
|
case 'G': |
|
if (*rp < '0' || *rp > '9') |
|
return NULL; |
|
/* XXX Ignore the number since we would need some more |
|
information to compute a real date. */ |
|
do |
|
++rp; |
|
while (*rp >= '0' && *rp <= '9'); |
|
break; |
|
case 'U': |
|
case 'V': |
|
case 'W': |
|
get_number (0, 53, 2); |
|
/* XXX This cannot determine any field in TM without some |
|
information. */ |
|
break; |
|
case 'w': |
|
/* Match number of weekday. */ |
|
get_number (0, 6, 1); |
|
tm->tm_wday = val; |
|
have_wday = 1; |
|
break; |
|
case 'y': |
|
#ifdef _NL_CURRENT |
|
match_year_in_century: |
|
#endif |
|
/* Match year within century. */ |
|
get_number (0, 99, 2); |
|
/* The "Year 2000: The Millennium Rollover" paper suggests that |
|
values in the range 69-99 refer to the twentieth century. */ |
|
tm->tm_year = val >= 69 ? val : val + 100; |
|
/* Indicate that we want to use the century, if specified. */ |
|
want_century = 1; |
|
want_xday = 1; |
|
break; |
|
case 'Y': |
|
/* Match year including century number. */ |
|
get_number (0, 9999, 4); |
|
tm->tm_year = val - 1900; |
|
want_century = 0; |
|
want_xday = 1; |
|
break; |
|
case 'Z': |
|
/* XXX How to handle this? */ |
|
break; |
|
case 'E': |
|
#ifdef _NL_CURRENT |
|
switch (*fmt++) |
|
{ |
|
case 'c': |
|
/* Match locale's alternate date and time format. */ |
|
if (*decided != raw) |
|
{ |
|
const char *fmt = _NL_CURRENT (LC_TIME, ERA_D_T_FMT); |
|
|
|
if (*fmt == '\0') |
|
fmt = _NL_CURRENT (LC_TIME, D_T_FMT); |
|
|
|
if (!recursive (fmt)) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (strcmp (fmt, HERE_D_T_FMT)) |
|
*decided = loc; |
|
want_xday = 1; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
/* The C locale has no era information, so use the |
|
normal representation. */ |
|
if (!recursive (HERE_D_T_FMT)) |
|
return NULL; |
|
want_xday = 1; |
|
break; |
|
case 'C': |
|
if (*decided != raw) |
|
{ |
|
if (era_cnt >= 0) |
|
{ |
|
era = _nl_select_era_entry (era_cnt); |
|
if (match_string (era->era_name, rp)) |
|
{ |
|
*decided = loc; |
|
break; |
|
} |
|
else |
|
return NULL; |
|
} |
|
else |
|
{ |
|
num_eras = _NL_CURRENT_WORD (LC_TIME, |
|
_NL_TIME_ERA_NUM_ENTRIES); |
|
for (era_cnt = 0; era_cnt < (int) num_eras; |
|
++era_cnt, rp = rp_backup) |
|
{ |
|
era = _nl_select_era_entry (era_cnt); |
|
if (match_string (era->era_name, rp)) |
|
{ |
|
*decided = loc; |
|
break; |
|
} |
|
} |
|
if (era_cnt == (int) num_eras) |
|
{ |
|
era_cnt = -1; |
|
if (*decided == loc) |
|
return NULL; |
|
} |
|
else |
|
break; |
|
} |
|
|
|
*decided = raw; |
|
} |
|
/* The C locale has no era information, so use the |
|
normal representation. */ |
|
goto match_century; |
|
case 'y': |
|
if (*decided == raw) |
|
goto match_year_in_century; |
|
|
|
get_number(0, 9999, 4); |
|
tm->tm_year = val; |
|
want_era = 1; |
|
want_xday = 1; |
|
break; |
|
case 'Y': |
|
if (*decided != raw) |
|
{ |
|
num_eras = _NL_CURRENT_WORD (LC_TIME, |
|
_NL_TIME_ERA_NUM_ENTRIES); |
|
for (era_cnt = 0; era_cnt < (int) num_eras; |
|
++era_cnt, rp = rp_backup) |
|
{ |
|
era = _nl_select_era_entry (era_cnt); |
|
if (recursive (era->era_format)) |
|
break; |
|
} |
|
if (era_cnt == (int) num_eras) |
|
{ |
|
era_cnt = -1; |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
*decided = loc; |
|
era_cnt = -1; |
|
break; |
|
} |
|
|
|
*decided = raw; |
|
} |
|
get_number (0, 9999, 4); |
|
tm->tm_year = val - 1900; |
|
want_century = 0; |
|
want_xday = 1; |
|
break; |
|
case 'x': |
|
if (*decided != raw) |
|
{ |
|
const char *fmt = _NL_CURRENT (LC_TIME, ERA_D_FMT); |
|
|
|
if (*fmt == '\0') |
|
fmt = _NL_CURRENT (LC_TIME, D_FMT); |
|
|
|
if (!recursive (fmt)) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (strcmp (fmt, HERE_D_FMT)) |
|
*decided = loc; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
if (!recursive (HERE_D_FMT)) |
|
return NULL; |
|
break; |
|
case 'X': |
|
if (*decided != raw) |
|
{ |
|
const char *fmt = _NL_CURRENT (LC_TIME, ERA_T_FMT); |
|
|
|
if (*fmt == '\0') |
|
fmt = _NL_CURRENT (LC_TIME, T_FMT); |
|
|
|
if (!recursive (fmt)) |
|
{ |
|
if (*decided == loc) |
|
return NULL; |
|
else |
|
rp = rp_backup; |
|
} |
|
else |
|
{ |
|
if (strcmp (fmt, HERE_T_FMT)) |
|
*decided = loc; |
|
break; |
|
} |
|
*decided = raw; |
|
} |
|
if (!recursive (HERE_T_FMT)) |
|
return NULL; |
|
break; |
|
default: |
|
return NULL; |
|
} |
|
break; |
|
#else |
|
/* We have no information about the era format. Just use |
|
the normal format. */ |
|
if (*fmt != 'c' && *fmt != 'C' && *fmt != 'y' && *fmt != 'Y' |
|
&& *fmt != 'x' && *fmt != 'X') |
|
/* This is an illegal format. */ |
|
return NULL; |
|
|
|
goto start_over; |
|
#endif |
|
case 'O': |
|
switch (*fmt++) |
|
{ |
|
case 'd': |
|
case 'e': |
|
/* Match day of month using alternate numeric symbols. */ |
|
get_alt_number (1, 31, 2); |
|
tm->tm_mday = val; |
|
have_mday = 1; |
|
want_xday = 1; |
|
break; |
|
case 'H': |
|
/* Match hour in 24-hour clock using alternate numeric |
|
symbols. */ |
|
get_alt_number (0, 23, 2); |
|
tm->tm_hour = val; |
|
have_I = 0; |
|
break; |
|
case 'I': |
|
/* Match hour in 12-hour clock using alternate numeric |
|
symbols. */ |
|
get_alt_number (1, 12, 2); |
|
tm->tm_hour = val - 1; |
|
have_I = 1; |
|
break; |
|
case 'm': |
|
/* Match month using alternate numeric symbols. */ |
|
get_alt_number (1, 12, 2); |
|
tm->tm_mon = val - 1; |
|
have_mon = 1; |
|
want_xday = 1; |
|
break; |
|
case 'M': |
|
/* Match minutes using alternate numeric symbols. */ |
|
get_alt_number (0, 59, 2); |
|
tm->tm_min = val; |
|
break; |
|
case 'S': |
|
/* Match seconds using alternate numeric symbols. */ |
|
get_alt_number (0, 61, 2); |
|
tm->tm_sec = val; |
|
break; |
|
case 'U': |
|
case 'V': |
|
case 'W': |
|
get_alt_number (0, 53, 2); |
|
/* XXX This cannot determine any field in TM without |
|
further information. */ |
|
break; |
|
case 'w': |
|
/* Match number of weekday using alternate numeric symbols. */ |
|
get_alt_number (0, 6, 1); |
|
tm->tm_wday = val; |
|
have_wday = 1; |
|
break; |
|
case 'y': |
|
/* Match year within century using alternate numeric symbols. */ |
|
get_alt_number (0, 99, 2); |
|
tm->tm_year = val >= 69 ? val : val + 100; |
|
want_xday = 1; |
|
break; |
|
default: |
|
return NULL; |
|
} |
|
break; |
|
default: |
|
return NULL; |
|
} |
|
} |
|
|
|
if (have_I && is_pm) |
|
tm->tm_hour += 12; |
|
|
|
if (century != -1) |
|
{ |
|
if (want_century) |
|
tm->tm_year = tm->tm_year % 100 + (century - 19) * 100; |
|
else |
|
/* Only the century, but not the year. Strange, but so be it. */ |
|
tm->tm_year = (century - 19) * 100; |
|
} |
|
|
|
#ifdef _NL_CURRENT |
|
if (era_cnt != -1) |
|
{ |
|
era = _nl_select_era_entry(era_cnt); |
|
if (want_era) |
|
tm->tm_year = (era->start_date[0] |
|
+ ((tm->tm_year - era->offset) |
|
* era->absolute_direction)); |
|
else |
|
/* Era start year assumed. */ |
|
tm->tm_year = era->start_date[0]; |
|
} |
|
else |
|
#endif |
|
if (want_era) |
|
return NULL; |
|
|
|
if (want_xday && !have_wday) |
|
{ |
|
if ( !(have_mon && have_mday) && have_yday) |
|
{ |
|
/* We don't have tm_mon and/or tm_mday, compute them. */ |
|
int t_mon = 0; |
|
while (__mon_yday[__isleap(1900 + tm->tm_year)][t_mon] <= tm->tm_yday) |
|
t_mon++; |
|
if (!have_mon) |
|
tm->tm_mon = t_mon - 1; |
|
if (!have_mday) |
|
tm->tm_mday = |
|
(tm->tm_yday |
|
- __mon_yday[__isleap(1900 + tm->tm_year)][t_mon - 1] + 1); |
|
} |
|
day_of_the_week (tm); |
|
} |
|
if (want_xday && !have_yday) |
|
day_of_the_year (tm); |
|
|
|
return (char *) rp; |
|
} |
|
|
|
|
|
char * |
|
strptime (buf, format, tm) |
|
const char *buf; |
|
const char *format; |
|
struct tm *tm; |
|
{ |
|
enum locale_status decided; |
|
|
|
#ifdef _NL_CURRENT |
|
decided = not; |
|
#else |
|
decided = raw; |
|
#endif |
|
return strptime_internal (buf, format, tm, &decided, -1); |
|
}
|
|
|