mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-24 10:22:41 +08:00
f8adc70c3f
* sysdeps/generic/strrchr.c: Deansideclized. * elf/Makefile (ldd): Depend on Makefile. Find ld.so in $(slibdir) instead of $(libdir). * sysdeps/i386/strrchr.S: Use `testl $3, %esi' instead of `testb $3, %esi'; gas misassembles the latter into `testb $3, %dh'. * mach/Machrules (%.udeps rule): Do $(make-target-directory) first. Tue May 14 16:38:44 1996 David Mosberger-Tang <davidm@AZStarNet.com> * sunrpc/getrpcent.c (interpret): Declare args. Rewrite parsing using strpbrk. Tue May 14 20:18:38 1996 Ulrich Drepper <drepper@cygnus.com> * time/Makefile (routines): Add strptime. * time/time.h: Add prototype for strptime. * time/strptime.c: New file. Implementation according to XPG4.
345 lines
8.5 KiB
C
345 lines
8.5 KiB
C
/* strptime - Convert a string representation of time to a time value.
|
|
Copyright (C) 1996 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
|
|
|
|
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
|
|
License, or (at your option) any later version.
|
|
|
|
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
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#include <ctype.h>
|
|
#include <langinfo.h>
|
|
#include <limits.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
|
|
#include "../locale/localeinfo.h"
|
|
|
|
|
|
#define match_char(ch1, ch2) if (ch1 != ch2) return NULL
|
|
#define match_string(cs1, s2) \
|
|
({ size_t len = strlen (cs1); \
|
|
int result = strncasecmp (cs1, s2, len) == 0; \
|
|
if (result) s2 += len; \
|
|
result; })
|
|
/* We intentionally do not use isdigit() for testing because this will
|
|
lead to problems with the wide character version. */
|
|
#define get_number(from, to) \
|
|
do { \
|
|
val = 0; \
|
|
if (*rp < '0' || *rp > '9') \
|
|
return NULL; \
|
|
do { \
|
|
val *= 10; \
|
|
val += *rp++ - '0'; \
|
|
} while (val * 10 <= to && *rp >= '0' && *rp <= '9'); \
|
|
if (val < from || val > to) \
|
|
return NULL; \
|
|
} while (0)
|
|
#define get_alt_number(from, to) \
|
|
do { \
|
|
const char *alts = _NL_CURRENT (LC_TIME, ALT_DIGITS); \
|
|
val = 0; \
|
|
while (*alts != '\0') \
|
|
{ \
|
|
size_t len = strlen (alts); \
|
|
if (strncasecmp (alts, rp, len) == 0) \
|
|
break; \
|
|
alts = strchr (alts, '\0') + 1; \
|
|
++val; \
|
|
} \
|
|
if (*alts == '\0') \
|
|
return NULL; \
|
|
} while (0)
|
|
#define recursive(new_fmt) \
|
|
do { \
|
|
if (*new_fmt == '\0') \
|
|
return NULL; \
|
|
rp = strptime (rp, new_fmt, tm); \
|
|
if (rp == NULL) \
|
|
return NULL; \
|
|
} while (0)
|
|
|
|
|
|
char *
|
|
strptime (const char *buf, const char *format, struct tm *tm)
|
|
{
|
|
const char *rp;
|
|
const char *fmt;
|
|
int cnt;
|
|
size_t val;
|
|
int have_I, is_pm;
|
|
|
|
rp = buf;
|
|
fmt = format;
|
|
have_I = is_pm = 0;
|
|
|
|
while (*fmt != '\0')
|
|
{
|
|
/* A white space in the format string matches 0 more or white
|
|
space in the input string. */
|
|
if (isspace (*fmt))
|
|
{
|
|
while (isspace (*rp))
|
|
++rp;
|
|
++fmt;
|
|
continue;
|
|
}
|
|
|
|
/* Any character but `%' must be matched by the same character
|
|
in the iput string. */
|
|
if (*fmt != '%')
|
|
{
|
|
match_char (*fmt++, *rp++);
|
|
continue;
|
|
}
|
|
|
|
++fmt;
|
|
switch (*fmt++)
|
|
{
|
|
case '%':
|
|
/* Match the `%' character itself. */
|
|
match_char ('%', *rp++);
|
|
break;
|
|
case 'a':
|
|
case 'A':
|
|
/* Match day of week. */
|
|
for (cnt = 0; cnt < 7; ++cnt)
|
|
{
|
|
if (match_string (_NL_CURRENT (LC_TIME, ABDAY_1 + cnt), rp))
|
|
break;
|
|
if (match_string (_NL_CURRENT (LC_TIME, DAY_1 + cnt), rp))
|
|
break;
|
|
}
|
|
if (cnt == 7)
|
|
/* Does not match a weekday name. */
|
|
return NULL;
|
|
tm->tm_wday = cnt;
|
|
break;
|
|
case 'b':
|
|
case 'B':
|
|
case 'h':
|
|
/* Match month name. */
|
|
for (cnt = 0; cnt < 12; ++cnt)
|
|
{
|
|
if (match_string (_NL_CURRENT (LC_TIME, ABMON_1 + cnt), rp))
|
|
break;
|
|
if (match_string (_NL_CURRENT (LC_TIME, MON_1 + cnt), rp))
|
|
break;
|
|
}
|
|
if (cnt == 12)
|
|
/* Does not match a month name. */
|
|
return NULL;
|
|
tm->tm_mon = cnt;
|
|
break;
|
|
case 'c':
|
|
/* Match locale's date and time format. */
|
|
recursive (_NL_CURRENT (LC_TIME, D_T_FMT));
|
|
break;
|
|
case 'C':
|
|
/* Match century number. */
|
|
get_number (0, 99);
|
|
/* We don't need the number. */
|
|
break;
|
|
case 'd':
|
|
case 'e':
|
|
/* Match day of month. */
|
|
get_number (1, 31);
|
|
tm->tm_mday = val;
|
|
break;
|
|
case 'D':
|
|
/* Match standard day format. */
|
|
recursive ("%m/%d/%y");
|
|
break;
|
|
case 'H':
|
|
/* Match hour in 24-hour clock. */
|
|
get_number (0, 23);
|
|
tm->tm_hour = val;
|
|
have_I = 0;
|
|
break;
|
|
case 'I':
|
|
/* Match hour in 12-hour clock. */
|
|
get_number (1, 12);
|
|
tm->tm_hour = val - 1;
|
|
have_I = 1;
|
|
break;
|
|
case 'j':
|
|
/* Match day number of year. */
|
|
get_number (1, 366);
|
|
tm->tm_yday = val - 1;
|
|
break;
|
|
case 'm':
|
|
/* Match number of month. */
|
|
get_number (1, 12);
|
|
tm->tm_mon = val - 1;
|
|
break;
|
|
case 'M':
|
|
/* Match minute. */
|
|
get_number (0, 59);
|
|
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. */
|
|
if (match_string (_NL_CURRENT (LC_TIME, AM_STR), rp))
|
|
break;
|
|
if (match_string (_NL_CURRENT (LC_TIME, PM_STR), rp))
|
|
{
|
|
is_pm = 1;
|
|
break;
|
|
}
|
|
return NULL;
|
|
case 'r':
|
|
recursive (_NL_CURRENT (LC_TIME, T_FMT_AMPM));
|
|
break;
|
|
case 'R':
|
|
recursive ("%H:%M");
|
|
break;
|
|
case 'S':
|
|
get_number (0, 61);
|
|
tm->tm_sec = val;
|
|
break;
|
|
case 'T':
|
|
recursive ("%H:%M:%S");
|
|
break;
|
|
case 'U':
|
|
case 'V':
|
|
case 'W':
|
|
get_number (0, 53);
|
|
/* XXX This cannot determine any field in TM. */
|
|
break;
|
|
case 'w':
|
|
/* Match number of weekday. */
|
|
get_number (0, 6);
|
|
tm->tm_wday = val;
|
|
break;
|
|
case 'x':
|
|
recursive (_NL_CURRENT (LC_TIME, D_FMT));
|
|
break;
|
|
case 'X':
|
|
recursive (_NL_CURRENT (LC_TIME, T_FMT));
|
|
break;
|
|
case 'y':
|
|
/* Match year within century. */
|
|
get_number (0, 99);
|
|
tm->tm_year = val;
|
|
break;
|
|
case 'Y':
|
|
/* Match year including century number. */
|
|
get_number (0, INT_MAX);
|
|
tm->tm_year = val - (val >= 2000 ? 2000 : 1900);
|
|
break;
|
|
case 'Z':
|
|
/* XXX How to handle this? */
|
|
break;
|
|
case 'E':
|
|
switch (*fmt++)
|
|
{
|
|
case 'c':
|
|
/* Match locale's alternate date and time format. */
|
|
recursive (_NL_CURRENT (LC_TIME, ERA_D_T_FMT));
|
|
break;
|
|
case 'C':
|
|
case 'y':
|
|
case 'Y':
|
|
/* Match name of base year in locale's alternate
|
|
representation. */
|
|
/* XXX This is currently not implemented. It should
|
|
use the value _NL_CURRENT (LC_TIME, ERA) but POSIX
|
|
leaves this implementation defined and we haven't
|
|
figured out how to do it yet. */
|
|
break;
|
|
case 'x':
|
|
recursive (_NL_CURRENT (LC_TIME, ERA_D_FMT));
|
|
break;
|
|
case 'X':
|
|
recursive (_NL_CURRENT (LC_TIME, ERA_T_FMT));
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
break;
|
|
case 'O':
|
|
switch (*fmt++)
|
|
{
|
|
case 'd':
|
|
case 'e':
|
|
/* Match day of month using alternate numeric symbols. */
|
|
get_alt_number (1, 31);
|
|
tm->tm_mday = val;
|
|
break;
|
|
case 'H':
|
|
/* Match hour in 24-hour clock using alternate numeric
|
|
symbols. */
|
|
get_alt_number (0, 23);
|
|
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);
|
|
tm->tm_hour = val - 1;
|
|
have_I = 1;
|
|
break;
|
|
case 'm':
|
|
/* Match month using alternate numeric symbols. */
|
|
get_alt_number (1, 12);
|
|
tm->tm_mon = val - 1;
|
|
break;
|
|
case 'M':
|
|
/* Match minutes using alternate numeric symbols. */
|
|
get_alt_number (0, 59);
|
|
tm->tm_min = val;
|
|
break;
|
|
case 'S':
|
|
/* Match seconds using alternate numeric symbols. */
|
|
get_alt_number (0, 61);
|
|
tm->tm_sec = val;
|
|
break;
|
|
case 'U':
|
|
case 'V':
|
|
case 'W':
|
|
get_alt_number (0, 53);
|
|
/* XXX This cannot determine any field in TM. */
|
|
break;
|
|
case 'w':
|
|
/* Match number of weekday using alternate numeric symbols. */
|
|
get_alt_number (0, 6);
|
|
tm->tm_wday = val;
|
|
break;
|
|
case 'y':
|
|
/* Match year within century using alternate numeric symbols. */
|
|
get_alt_number (0, 99);
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (have_I && is_pm)
|
|
tm->tm_hour += 12;
|
|
|
|
return (char *) rp;
|
|
}
|