/* Copyright (C) 2002, 2004-2005, 2007, 2009-2014 Free Software Foundation,
Inc.
This file is part of the GNU C Library.
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 Free Software Foundation; either version 2, or (at your option)
any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, see . */
/*
* File from gnulib (http://www.gnu.org/software/gnulib/), processed with
* coan source -U_LIBC -U_NL_CURRENT -UHAVE_TM_GMTOFF strptime.c
* and lightly edited.
*/
#include
#include
#include
#include
#include
#include
enum ptime_locale_status { not, loc, raw };
#define match_char(ch1, ch2) if (ch1 != ch2) return NULL
/* Oh come on. Get a reasonable compiler. */
# define match_string(cs1, s2) \
(strncasecmp ((cs1), (s2), strlen (cs1)) ? 0 : ((s2) += strlen (cs1), 1))
/* We intentionally do not use isdigit() for testing because this will
lead to problems with the wide character version. */
#define get_number(from, to, n) \
do { \
int __n = n; \
val = 0; \
while (*rp == ' ') \
++rp; \
if (*rp < '0' || *rp > '9') \
return NULL; \
do { \
val *= 10; \
val += *rp++ - '0'; \
} while (--__n > 0 && val * 10 <= to && *rp >= '0' && *rp <= '9'); \
if (val < from || val > to) \
return NULL; \
} while (0)
# define get_alt_number(from, to, n) \
/* We don't have the alternate representation. */ \
get_number(from, to, n)
#define recursive(new_fmt) \
(*(new_fmt) != '\0' \
&& (rp = __strptime_internal (rp, (new_fmt), tm, \
decided, era_cnt LOCALE_ARG)) != NULL)
static char const weekday_name[][10] =
{
"Sunday", "Monday", "Tuesday", "Wednesday",
"Thursday", "Friday", "Saturday"
};
static char const ab_weekday_name[][4] =
{
"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
};
static char const month_name[][10] =
{
"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
};
static char const ab_month_name[][4] =
{
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
# define HERE_D_T_FMT "%a %b %e %H:%M:%S %Y"
# define HERE_D_FMT "%m/%d/%y"
# define HERE_AM_STR "AM"
# define HERE_PM_STR "PM"
# define HERE_T_FMT_AMPM "%I:%M:%S %p"
# define HERE_T_FMT "%H:%M:%S"
static const unsigned short int __mon_yday[2][13] =
{
/* Normal years. */
{ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 },
/* Leap years. */
{ 0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366 }
};
# define LOCALE_PARAM
# define LOCALE_ARG
# define LOCALE_PARAM_DECL
# define LOCALE_PARAM_PROTO
# define HELPER_LOCALE_ARG
# define ISSPACE(Ch) isspace (Ch)
#ifndef __isleap
/* Nonzero if YEAR is a leap year (every 4 years,
except every 100th isn't, and every 400th is). */
# define __isleap(year) \
((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
#endif
/* Compute the day of the week. */
static void
day_of_the_week (struct tm *tm)
{
/* We know that January 1st 1970 was a Thursday (= 4). Compute the
difference between this data in the one on TM and so determine
the weekday. */
int corr_year = 1900 + tm->tm_year - (tm->tm_mon < 2);
int wday = (-473
+ (365 * (tm->tm_year - 70))
+ (corr_year / 4)
- ((corr_year / 4) / 25) + ((corr_year / 4) % 25 < 0)
+ (((corr_year / 4) / 25) / 4)
+ __mon_yday[0][tm->tm_mon]
+ tm->tm_mday - 1);
tm->tm_wday = ((wday % 7) + 7) % 7;
}
/* Compute the day of the year. */
static void
day_of_the_year (struct tm *tm)
{
tm->tm_yday = (__mon_yday[__isleap (1900 + tm->tm_year)][tm->tm_mon]
+ (tm->tm_mday - 1));
}
static char *
__strptime_internal (rp, fmt, tm, decided, era_cnt LOCALE_PARAM)
const char *rp;
const char *fmt;
struct tm *tm;
enum ptime_locale_status *decided;
int era_cnt;
LOCALE_PARAM_DECL
{
int cnt;
size_t val;
int have_I, is_pm;
int century, want_century;
int want_era;
int have_wday, want_xday;
int have_yday;
int have_mon, have_mday;
int have_uweek, have_wweek;
int week_no;
have_I = is_pm = 0;
century = -1;
want_century = 0;
want_era = 0;
week_no = 0;
have_wday = want_xday = have_yday = have_mon = have_mday = have_uweek = 0;
have_wweek = 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;
/* We need this for handling the 'E' modifier. */
start_over:
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 (*decided != loc
&& (match_string (weekday_name[cnt], rp)
|| match_string (ab_weekday_name[cnt], rp)))
{
*decided = raw;
break;
}
}
if (cnt == 7)
/* Does not match a weekday name. */
return NULL;
tm->tm_wday = cnt;
have_wday = 1;
break;
case 'b':
case 'B':
case 'h':
/* Match month name. */
for (cnt = 0; cnt < 12; ++cnt)
{
if (match_string (month_name[cnt], rp)
|| match_string (ab_month_name[cnt], rp))
{
*decided = raw;
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. */
if (!recursive (HERE_D_T_FMT))
return NULL;
want_xday = 1;
break;
case 'C':
/* Match century number. */
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':
/* 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 'l':
/* Match hour in 12-hour clock. GNU extension. */
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. */
if (!match_string (HERE_AM_STR, rp))
{
if (match_string (HERE_PM_STR, rp))
is_pm = 1;
else
return NULL;
}
break;
case 'r':
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':
/* 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':
get_number (0, 53, 2);
week_no = val;
have_uweek = 1;
break;
case 'W':
get_number (0, 53, 2);
week_no = val;
have_wweek = 1;
break;
case 'V':
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':
/* 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 'z':
/* We recognize two formats: if two digits are given, these
specify hours. If fours digits are used, minutes are
also specified. */
{
bool neg;
int n;
val = 0;
while (*rp == ' ')
++rp;
if (*rp != '+' && *rp != '-')
return NULL;
neg = *rp++ == '-';
n = 0;
while (n < 4 && *rp >= '0' && *rp <= '9')
{
val = val * 10 + *rp++ - '0';
++n;
}
if (n == 2)
val *= 100;
else if (n != 4)
/* Only two or four digits recognized. */
return NULL;
else
{
/* We have to convert the minutes into decimal. */
if (val % 100 >= 60)
return NULL;
val = (val / 100) * 100 + ((val % 100) * 50) / 30;
}
if (val > 1200)
return NULL;
}
break;
case 'E':
/* 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;
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 % 12;
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':
get_alt_number (0, 53, 2);
week_no = val;
have_uweek = 1;
break;
case 'W':
get_alt_number (0, 53, 2);
week_no = val;
have_wweek = 1;
break;
case 'V':
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;
}
if (era_cnt != -1)
{
}
else
if (want_era)
{
/* No era found but we have seen an E modifier. Rectify some
values. */
if (want_century && century == -1 && tm->tm_year < 69)
tm->tm_year += 100;
}
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);
if ((have_uweek || have_wweek) && have_wday)
{
int save_wday = tm->tm_wday;
int save_mday = tm->tm_mday;
int save_mon = tm->tm_mon;
int w_offset = have_uweek ? 0 : 1;
tm->tm_mday = 1;
tm->tm_mon = 0;
day_of_the_week (tm);
if (have_mday)
tm->tm_mday = save_mday;
if (have_mon)
tm->tm_mon = save_mon;
if (!have_yday)
tm->tm_yday = ((7 - (tm->tm_wday - w_offset)) % 7
+ (week_no - 1) *7
+ save_wday - w_offset);
if (!have_mday || !have_mon)
{
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);
}
tm->tm_wday = save_wday;
}
return (char *) rp;
}
char *
strptime (buf, format, tm LOCALE_PARAM)
const char *buf;
const char *format;
struct tm *tm;
LOCALE_PARAM_DECL
{
enum ptime_locale_status decided;
decided = raw;
return __strptime_internal (buf, format, tm, &decided, -1 LOCALE_ARG);
}