#include <sys/cdefs.h>
#ifndef lint
#ifndef NOID
static char copyright[] __unused =
"@(#) Copyright (c) 1994 Powerdog Industries. All rights reserved.";
static char sccsid[] __unused = "@(#)strptime.c 0.1 (Powerdog) 94/03/27";
#endif
#endif
__FBSDID("$FreeBSD: src/lib/libc/stdtime/strptime.c,v 1.35 2003/11/17 04:19:15 nectar Exp $");
#include "xlocale_private.h"
#include "namespace.h"
#include <time.h>
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <pthread.h>
#include <stdint.h>
#include <limits.h>
#include "un-namespace.h"
#include "libc_private.h"
#include "timelocal.h"
static char * _strptime(const char *, const char *, struct tm *, int *, locale_t) __DARWIN_ALIAS(_strptime);
time_t _mktime(struct tm *, const char *);
#define asizeof(a) (sizeof (a) / sizeof ((a)[0]))
enum {CONVERT_NONE, CONVERT_GMT, CONVERT_ZONE};
#define _strptime(b,f,t,c,l) _strptime0(b,f,t,c,l,-1,0,-1)
static char *
_strptime0(const char *buf, const char *fmt, struct tm *tm, int *convp, locale_t loc, int year, int yday, int wday)
{
char c;
const char *ptr;
int i,
len;
int Ealternative, Oalternative;
struct lc_time_T *tptr = __get_current_time_locale(loc);
ptr = fmt;
while (*ptr != 0) {
if (*buf == 0) {
fmt = ptr;
while (isspace_l((unsigned char)*ptr, loc)) {
ptr++;
}
return ((*ptr)==0) ? fmt : 0;
}
c = *ptr++;
if (c != '%') {
if (isspace_l((unsigned char)c, loc))
while (*buf != 0 && isspace_l((unsigned char)*buf, loc))
buf++;
else if (c != *buf++)
return 0;
continue;
}
Ealternative = 0;
Oalternative = 0;
label:
c = *ptr++;
switch (c) {
case 0:
case '%':
if (*buf++ != '%')
return 0;
break;
case '+':
buf = _strptime(buf, tptr->date_fmt, tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'C':
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
len = 2;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i < 19)
return 0;
if (year != -1)
tm->tm_year = (year % 100) + i * 100 - 1900;
else
tm->tm_year = i * 100 - 1900;
year = tm->tm_year;
break;
case 'c':
buf = _strptime(buf, tptr->c_fmt, tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'D':
buf = _strptime(buf, "%m/%d/%y", tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'E':
if (Ealternative || Oalternative)
break;
Ealternative++;
goto label;
case 'O':
if (Ealternative || Oalternative)
break;
Oalternative++;
goto label;
case 'F':
buf = _strptime(buf, "%Y-%m-%d", tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'R':
buf = _strptime(buf, "%H:%M", tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'r':
buf = _strptime(buf, tptr->ampm_fmt, tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'n':
case 't':
if (!isspace((unsigned char)*buf))
return 0;
while (isspace((unsigned char)*buf))
buf++;
break;
case 'T':
buf = _strptime(buf, "%H:%M:%S", tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'X':
buf = _strptime(buf, tptr->X_fmt, tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'x':
buf = _strptime(buf, tptr->x_fmt, tm, convp, loc);
if (buf == 0)
return 0;
break;
case 'j':
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
len = 3;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i < 1 || i > 366)
return 0;
tm->tm_yday = yday = i - 1;
break;
case 'M':
case 'S':
if (*buf == 0 || isspace_l((unsigned char)*buf, loc))
break;
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
len = 2;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (c == 'M') {
if (i > 59)
return 0;
tm->tm_min = i;
} else {
if (i > 60)
return 0;
tm->tm_sec = i;
}
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 'H':
case 'I':
case 'k':
case 'l':
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
len = 2;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (c == 'H' || c == 'k') {
if (i > 23)
return 0;
} else if (i > 12)
return 0;
tm->tm_hour = i;
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 'p':
len = strlen(tptr->am);
if (strncasecmp_l(buf, tptr->am, len, loc) == 0) {
if (tm->tm_hour > 12)
return 0;
if (tm->tm_hour == 12)
tm->tm_hour = 0;
buf += len;
break;
}
len = strlen(tptr->pm);
if (strncasecmp_l(buf, tptr->pm, len, loc) == 0) {
if (tm->tm_hour > 12)
return 0;
if (tm->tm_hour != 12)
tm->tm_hour += 12;
buf += len;
break;
}
return 0;
case 'A':
case 'a':
for (i = 0; i < asizeof(tptr->weekday); i++) {
len = strlen(tptr->weekday[i]);
if (strncasecmp_l(buf, tptr->weekday[i],
len, loc) == 0)
break;
len = strlen(tptr->wday[i]);
if (strncasecmp_l(buf, tptr->wday[i],
len, loc) == 0)
break;
}
if (i == asizeof(tptr->weekday))
return 0;
tm->tm_wday = wday = i;
buf += len;
break;
case 'U':
case 'W':
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
len = 2;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i > 53)
return 0;
if ((year != -1) && (wday != -1)) {
struct tm mktm;
mktm.tm_year = year;
mktm.tm_mon = 0;
mktm.tm_mday = 1;
mktm.tm_sec = 1;
mktm.tm_min = mktm.tm_hour = 0;
mktm.tm_isdst = 0;
mktm.tm_gmtoff = 0;
if (mktime(&mktm) != -1) {
int delta = wday - mktm.tm_wday;
if (!wday && c =='W')
i++;
yday = 7 * i + delta;
if (yday < 0)
yday += 7;
tm->tm_yday = yday;
}
}
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 'u':
case 'w':
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
i = *buf - '0';
if (i > 6 + (c == 'u'))
return 0;
if (i == 7)
i = 0;
tm->tm_wday = wday = i;
buf++;
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 'd':
case 'e':
len = 2;
if (isspace_l((unsigned char)buf[0], loc) &&
isdigit_l((unsigned char)buf[1], loc) &&
!isdigit_l((unsigned char)buf[2], loc)) {
len = 1;
buf++;
}
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i > 31)
return 0;
tm->tm_mday = i;
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 'B':
case 'b':
case 'h':
for (i = 0; i < asizeof(tptr->month); i++) {
if (Oalternative) {
if (c == 'B') {
len = strlen(tptr->alt_month[i]);
if (strncasecmp_l(buf,
tptr->alt_month[i],
len, loc) == 0)
break;
}
} else {
len = strlen(tptr->month[i]);
if (strncasecmp_l(buf, tptr->month[i],
len, loc) == 0)
break;
len = strlen(tptr->mon[i]);
if (strncasecmp_l(buf, tptr->mon[i],
len, loc) == 0)
break;
}
}
if (i == asizeof(tptr->month))
return 0;
tm->tm_mon = i;
buf += len;
break;
case 'm':
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
len = 2;
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
if (i < 1 || i > 12)
return 0;
tm->tm_mon = i - 1;
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 's':
{
char *cp;
int sverrno;
long n;
time_t t;
sverrno = errno;
errno = 0;
n = strtol_l(buf, &cp, 10, loc);
if (errno == ERANGE || (long)(t = n) != n) {
errno = sverrno;
return 0;
}
errno = sverrno;
buf = cp;
gmtime_r(&t, tm);
*convp = CONVERT_GMT;
}
break;
case 'Y':
case 'y':
if (*buf == 0 || isspace_l((unsigned char)*buf, loc))
break;
if (!isdigit_l((unsigned char)*buf, loc))
return 0;
#if __DARWIN_UNIX03
if (c == 'Y') {
int savei = 0;
const char *savebuf = buf;
int64_t i64 = 0;
int overflow = 0;
for (len = 0; *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i64 *= 10;
i64 += *buf - '0';
if (++len <= 4) {
savei = i64;
savebuf = buf + 1;
}
if (i64 > INT_MAX) {
overflow++;
break;
}
}
if (len > 4 && !overflow) {
struct tm savetm = *tm;
int saveconv = *convp;
const char *saveptr = ptr;
char *ret;
if (i64 < 1900)
return 0;
tm->tm_year = i64 - 1900;
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
ret = _strptime0(buf, ptr, tm, convp, loc, tm->tm_year, yday, wday);
if (ret) return ret;
*tm = savetm;
*convp = saveconv;
ptr = saveptr;
}
buf = savebuf;
i = savei;
} else {
len = 2;
#else
len = (c == 'Y') ? 4 : 2;
#endif
for (i = 0; len && *buf != 0 && isdigit_l((unsigned char)*buf, loc); buf++) {
i *= 10;
i += *buf - '0';
len--;
}
#if __DARWIN_UNIX03
}
#endif
if (c == 'Y')
i -= 1900;
if (c == 'y' && i < 69)
i += 100;
if (i < 0)
return 0;
tm->tm_year = year = i;
if (*buf != 0 && isspace_l((unsigned char)*buf, loc))
while (*ptr != 0 && !isspace_l((unsigned char)*ptr, loc) && *ptr != '%')
ptr++;
break;
case 'Z':
{
const char *cp;
size_t tzlen, len;
for (cp = buf; *cp && isupper((unsigned char)*cp); ++cp) {}
len = cp - buf;
if (len == 3 && strncmp(buf, "GMT", 3) == 0) {
*convp = CONVERT_GMT;
buf += len;
break;
}
tzset();
tzlen = strlen(tzname[0]);
if (len == tzlen && strncmp(buf, tzname[0], tzlen) == 0) {
tm->tm_isdst = 0;
buf += len;
break;
}
tzlen = strlen(tzname[1]);
if (len == tzlen && strncmp(buf, tzname[1], tzlen) == 0) {
tm->tm_isdst = 1;
buf += len;
break;
}
return 0;
}
case 'z':
{
char sign;
int hr, min;
if ((buf[0] != '+' && buf[0] != '-')
|| !isdigit_l((unsigned char)buf[1], loc)
|| !isdigit_l((unsigned char)buf[2], loc)
|| !isdigit_l((unsigned char)buf[3], loc)
|| !isdigit_l((unsigned char)buf[4], loc))
return 0;
sscanf(buf, "%c%2d%2d", &sign, &hr, &min);
*convp = CONVERT_ZONE;
tm->tm_gmtoff = 60 * (60 * hr + min);
if (sign == '-')
tm->tm_gmtoff = -tm->tm_gmtoff;
buf += 5;
}
break;
}
}
return (char *)buf;
}
char *
strptime(const char * __restrict buf, const char * __restrict fmt,
struct tm * __restrict tm)
{
return strptime_l(buf, fmt, tm, __current_locale());
}
extern time_t timeoff(struct tm *, long);
char *
strptime_l(const char * __restrict buf, const char * __restrict fmt,
struct tm * __restrict tm, locale_t loc)
{
char *ret;
int conv;
NORMALIZE_LOCALE(loc);
conv = CONVERT_NONE;
tm->tm_zone = NULL;
ret = _strptime(buf, fmt, tm, &conv, loc);
if (ret) {
time_t t;
switch(conv) {
case CONVERT_GMT:
t = timegm(tm);
localtime_r(&t, tm);
break;
case CONVERT_ZONE:
{
long offset = tm->tm_gmtoff;
tm->tm_gmtoff = 0;
t = timeoff(tm, offset);
localtime_r(&t, tm);
break;
}
}
}
return (ret);
}