mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 03:27:39 +00:00
297 lines
8.2 KiB
C
297 lines
8.2 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
|
|
│ vi: set noet ft=c ts=8 sw=8 fenc=utf-8 :vi │
|
|
╚──────────────────────────────────────────────────────────────────────────────╝
|
|
│ │
|
|
│ Musl Libc │
|
|
│ Copyright © 2005-2014 Rich Felker, et al. │
|
|
│ │
|
|
│ Permission is hereby granted, free of charge, to any person obtaining │
|
|
│ a copy of this software and associated documentation files (the │
|
|
│ "Software"), to deal in the Software without restriction, including │
|
|
│ without limitation the rights to use, copy, modify, merge, publish, │
|
|
│ distribute, sublicense, and/or sell copies of the Software, and to │
|
|
│ permit persons to whom the Software is furnished to do so, subject to │
|
|
│ the following conditions: │
|
|
│ │
|
|
│ The above copyright notice and this permission notice shall be │
|
|
│ included in all copies or substantial portions of the Software. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
|
|
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
|
|
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
|
|
│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
|
|
│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
|
|
│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
|
|
│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
|
|
│ │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/fmt/conv.h"
|
|
#include "libc/macros.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/ctype.h"
|
|
#include "libc/str/langinfo.h"
|
|
#include "libc/time.h"
|
|
__static_yoink("musl_libc_notice");
|
|
|
|
char *strptime(const char *restrict s, const char *restrict f, struct tm *restrict tm)
|
|
{
|
|
int i, w, neg, adj, min, range, *dest, dummy;
|
|
const char *ex;
|
|
size_t len;
|
|
int want_century = 0, century = 0, relyear = 0;
|
|
while (*f) {
|
|
if (*f != '%') {
|
|
if (isspace(*f)) for (; *s && isspace(*s); s++);
|
|
else if (*s != *f) return 0;
|
|
else s++;
|
|
f++;
|
|
continue;
|
|
}
|
|
f++;
|
|
if (*f == '+') f++;
|
|
if (isdigit(*f)) {
|
|
char *new_f;
|
|
w=strtoul(f, &new_f, 10);
|
|
f = new_f;
|
|
} else {
|
|
w=-1;
|
|
}
|
|
adj=0;
|
|
switch (*f++) {
|
|
case 'a': case 'A':
|
|
dest = &tm->tm_wday;
|
|
min = ABDAY_1;
|
|
range = 7;
|
|
goto symbolic_range;
|
|
case 'b': case 'B': case 'h':
|
|
dest = &tm->tm_mon;
|
|
min = ABMON_1;
|
|
range = 12;
|
|
goto symbolic_range;
|
|
case 'c':
|
|
s = strptime(s, nl_langinfo(D_T_FMT), tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 'C':
|
|
dest = ¢ury;
|
|
if (w<0) w=2;
|
|
want_century |= 2;
|
|
goto numeric_digits;
|
|
case 'd': case 'e':
|
|
dest = &tm->tm_mday;
|
|
min = 1;
|
|
range = 31;
|
|
goto numeric_range;
|
|
case 'D':
|
|
s = strptime(s, "%m/%d/%y", tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 'F':
|
|
/* Use temp buffer to implement the odd requirement
|
|
* that entire field be width-limited but the year
|
|
* subfield not itself be limited. */
|
|
i = 0;
|
|
char tmp[20];
|
|
if (*s == '-' || *s == '+') tmp[i++] = *s++;
|
|
while (*s=='0' && isdigit(s[1])) s++;
|
|
for (; *s && i<(size_t)w && i+1<sizeof tmp; i++) {
|
|
tmp[i] = *s++;
|
|
}
|
|
tmp[i] = 0;
|
|
char *p = strptime(tmp, "%12Y-%m-%d", tm);
|
|
if (!p) return 0;
|
|
s -= tmp+i-p;
|
|
break;
|
|
case 'H':
|
|
dest = &tm->tm_hour;
|
|
min = 0;
|
|
range = 24;
|
|
goto numeric_range;
|
|
case 'I':
|
|
dest = &tm->tm_hour;
|
|
min = 1;
|
|
range = 12;
|
|
goto numeric_range;
|
|
case 'j':
|
|
dest = &tm->tm_yday;
|
|
min = 1;
|
|
range = 366;
|
|
adj = 1;
|
|
goto numeric_range;
|
|
case 'm':
|
|
dest = &tm->tm_mon;
|
|
min = 1;
|
|
range = 12;
|
|
adj = 1;
|
|
goto numeric_range;
|
|
case 'M':
|
|
dest = &tm->tm_min;
|
|
min = 0;
|
|
range = 60;
|
|
goto numeric_range;
|
|
case 'n': case 't':
|
|
for (; *s && isspace(*s); s++);
|
|
break;
|
|
case 'p':
|
|
ex = nl_langinfo(AM_STR);
|
|
len = strlen(ex);
|
|
if (!strncasecmp(s, ex, len)) {
|
|
tm->tm_hour %= 12;
|
|
s += len;
|
|
break;
|
|
}
|
|
ex = nl_langinfo(PM_STR);
|
|
len = strlen(ex);
|
|
if (!strncasecmp(s, ex, len)) {
|
|
tm->tm_hour %= 12;
|
|
tm->tm_hour += 12;
|
|
s += len;
|
|
break;
|
|
}
|
|
return 0;
|
|
case 'r':
|
|
s = strptime(s, nl_langinfo(T_FMT_AMPM), tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 'R':
|
|
s = strptime(s, "%H:%M", tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 's':
|
|
/* Parse only. Effect on tm is unspecified
|
|
* and presently no effect is implemented.. */
|
|
if (*s == '-') s++;
|
|
if (!isdigit(*s)) return 0;
|
|
while (isdigit(*s)) s++;
|
|
break;
|
|
case 'S':
|
|
dest = &tm->tm_sec;
|
|
min = 0;
|
|
range = 61;
|
|
goto numeric_range;
|
|
case 'T':
|
|
s = strptime(s, "%H:%M:%S", tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 'U':
|
|
case 'W':
|
|
/* Throw away result of %U, %V, %W, %g, and %G. Effect
|
|
* is unspecified and there is no clear right choice. */
|
|
dest = &dummy;
|
|
min = 0;
|
|
range = 54;
|
|
goto numeric_range;
|
|
case 'V':
|
|
dest = &dummy;
|
|
min = 1;
|
|
range = 53;
|
|
goto numeric_range;
|
|
case 'g':
|
|
dest = &dummy;
|
|
w = 2;
|
|
goto numeric_digits;
|
|
case 'G':
|
|
dest = &dummy;
|
|
if (w<0) w=4;
|
|
goto numeric_digits;
|
|
case 'u':
|
|
dest = &tm->tm_wday;
|
|
min = 1;
|
|
range = 7;
|
|
goto numeric_range;
|
|
case 'w':
|
|
dest = &tm->tm_wday;
|
|
min = 0;
|
|
range = 7;
|
|
goto numeric_range;
|
|
case 'x':
|
|
s = strptime(s, nl_langinfo(D_FMT), tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 'X':
|
|
s = strptime(s, nl_langinfo(T_FMT), tm);
|
|
if (!s) return 0;
|
|
break;
|
|
case 'y':
|
|
dest = &relyear;
|
|
w = 2;
|
|
want_century |= 1;
|
|
goto numeric_digits;
|
|
case 'Y':
|
|
dest = &tm->tm_year;
|
|
if (w<0) w=4;
|
|
adj = 1900;
|
|
want_century = 0;
|
|
goto numeric_digits;
|
|
case 'z':
|
|
if (*s == '+') neg = 0;
|
|
else if (*s == '-') neg = 1;
|
|
else return 0;
|
|
for (i=0; i<4; i++) if (!isdigit(s[1+i])) return 0;
|
|
tm->tm_gmtoff = (s[1]-'0')*36000+(s[2]-'0')*3600
|
|
+ (s[3]-'0')*600 + (s[4]-'0')*60;
|
|
if (neg) tm->tm_gmtoff = -tm->tm_gmtoff;
|
|
s += 5;
|
|
break;
|
|
case 'Z':
|
|
if (!strncmp(s, tzname[0], len = strlen(tzname[0]))) {
|
|
tm->tm_isdst = 0;
|
|
s += len;
|
|
} else if (!strncmp(s, tzname[1], len=strlen(tzname[1]))) {
|
|
tm->tm_isdst = 1;
|
|
s += len;
|
|
} else {
|
|
/* FIXME: is this supposed to be an error? */
|
|
while ((*s|32)-'a' <= 'z'-'a') s++;
|
|
}
|
|
break;
|
|
case '%':
|
|
if (*s++ != '%') return 0;
|
|
break;
|
|
default:
|
|
return 0;
|
|
numeric_range:
|
|
if (!isdigit(*s)) return 0;
|
|
*dest = 0;
|
|
for (i=1; i<=min+range && isdigit(*s); i*=10)
|
|
*dest = *dest * 10 + *s++ - '0';
|
|
if (*dest - min >= (unsigned)range) return 0;
|
|
*dest -= adj;
|
|
switch((char *)dest - (char *)tm) {
|
|
case offsetof(struct tm, tm_yday):
|
|
;
|
|
}
|
|
goto update;
|
|
numeric_digits:
|
|
neg = 0;
|
|
if (*s == '+') s++;
|
|
else if (*s == '-') neg=1, s++;
|
|
if (!isdigit(*s)) return 0;
|
|
for (*dest=i=0; i<w && isdigit(*s); i++)
|
|
*dest = *dest * 10 + *s++ - '0';
|
|
if (neg) *dest = -*dest;
|
|
*dest -= adj;
|
|
goto update;
|
|
symbolic_range:
|
|
for (i=2*range-1; i>=0; i--) {
|
|
ex = nl_langinfo(min+i);
|
|
len = strlen(ex);
|
|
if (strncasecmp(s, ex, len)) continue;
|
|
s += len;
|
|
*dest = i % range;
|
|
break;
|
|
}
|
|
if (i<0) return 0;
|
|
goto update;
|
|
update:
|
|
//FIXME
|
|
;
|
|
}
|
|
}
|
|
if (want_century) {
|
|
tm->tm_year = relyear;
|
|
if (want_century & 2) tm->tm_year += century * 100 - 1900;
|
|
else if (tm->tm_year <= 68) tm->tm_year += 100;
|
|
}
|
|
return (char *)s;
|
|
}
|