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-rw-r--r--src/time/strptime.c297
1 files changed, 149 insertions, 148 deletions
diff --git a/src/time/strptime.c b/src/time/strptime.c
index db72e610..d9481d1b 100644
--- a/src/time/strptime.c
+++ b/src/time/strptime.c
@@ -2,177 +2,178 @@
#include <stdlib.h>
#include <langinfo.h>
#include <time.h>
-
-const char *__langinfo(nl_item);
-
-char *strptime(const char *s, const char *f, struct tm *tm)
-{
- return NULL;
-}
-
-#if 0
+#include <ctype.h>
+#include <stddef.h>
+#include <string.h>
+#include <strings.h>
char *strptime(const char *s, const char *f, struct tm *tm)
{
- nl_item item;
- int *dest;
- const char *fmt;
- for (; *f; f++) {
- if (isspace(*f)) goto whitespace;
- if (*f == '%') {
-do_fmt:
- switch (*++f) {
- case '%':
- goto literal;
- case 'E':
- case 'O':
- goto do_fmt;
- case 'a':
- item = ABDAY_1 + tm->tm_wday;
- goto nl_strcat;
- case 'A':
- item = DAY_1 + tm->tm_wday;
- goto nl_strcat;
- case 'h':
- case 'b':
- item = ABMON_1 + tm->tm_mon;
- goto nl_strcat;
- case 'B':
- item = MON_1 + tm->tm_mon;
- goto nl_strcat;
+ int i, w, neg, adj, min, range, *dest;
+ const char *ex;
+ size_t len;
+ while (*f) {
+ if (*f != '%') {
+ if (isspace(*f)) for (; *s && isspace(*s); s++);
+ else if (*s != *f) return 0;
+ else s++;
+ f++;
+ }
+ f++;
+ if (*f == '+') f++;
+ if (isdigit(*f)) w=strtoul(f, (void *)&f, 10);
+ 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':
- item = D_T_FMT;
- goto nl_strftime;
+ s = strptime(s, nl_langinfo(D_T_FMT), tm);
+ if (!s) return 0;
+ break;
case 'C':
- val = (1900+tm->tm_year) / 100;
- fmt = "%02d";
- goto number;
- case 'd':
- val = tm->tm_mday;
- fmt = "%02d";
- goto number;
+ case 'd': case 'e':
+ dest = &tm->tm_mday;
+ min = 1;
+ range = 31;
+ goto numeric_range;
case 'D':
- fmt = "%m/%d/%y";
- goto recu_strftime;
- case 'e':
- val = tm->tm_mday;
- fmt = "%2d";
- goto number;
- case 'F':
- fmt = "%Y-%m-%d";
- goto recu_strftime;
- case 'g':
- // FIXME
- val = 0; //week_based_year(tm)%100;
- fmt = "%02d";
- goto number;
- case 'G':
- // FIXME
- val = 0; //week_based_year(tm);
- fmt = "%04d";
- goto number;
+ s = strptime(s, "%m/%d/%y", tm);
+ if (!s) return 0;
+ break;
case 'H':
- val = tm->tm_hour;
- fmt = "%02d";
- goto number;
+ dest = &tm->tm_hour;
+ min = 0;
+ range = 24;
+ goto numeric_range;
case 'I':
- val = tm->tm_hour;
- if (!val) val = 12;
- else if (val > 12) val -= 12;
- fmt = "%02d";
- goto number;
+ dest = &tm->tm_hour;
+ min = 1;
+ range = 12;
+ goto numeric_range;
case 'j':
- val = tm->tm_yday+1;
- fmt = "%03d";
- goto number;
+ dest = &tm->tm_yday;
+ min = 1;
+ range = 366;
+ goto numeric_range;
case 'm':
- val = tm->tm_mon+1;
- fmt = "%02d";
- goto number;
+ dest = &tm->tm_mon;
+ min = 1;
+ range = 12;
+ adj = 1;
+ goto numeric_range;
case 'M':
- val = tm->tm_min;
- fmt = "%02d";
- goto number;
- case 'n':
- case 't':
- goto whitespace;
+ dest = &tm->tm_min;
+ min = 0;
+ range = 60;
+ goto numeric_range;
+ case 'n': case 't':
+ for (; *s && isspace(*s); s++);
+ break;
case 'p':
- item = tm->tm_hour >= 12 ? PM_STR : AM_STR;
- goto nl_strcat;
+ ex = nl_langinfo(AM_STR);
+ len = strlen(ex);
+ if (!strncasecmp(s, ex, len)) {
+ tm->tm_hour %= 12;
+ break;
+ }
+ ex = nl_langinfo(PM_STR);
+ len = strlen(ex);
+ if (!strncasecmp(s, ex, len)) {
+ tm->tm_hour %= 12;
+ tm->tm_hour += 12;
+ break;
+ }
+ return 0;
case 'r':
- item = T_FMT_AMPM;
- goto nl_strftime;
+ s = strptime(s, nl_langinfo(T_FMT_AMPM), tm);
+ if (!s) return 0;
+ break;
case 'R':
- fmt = "%H:%M";
- goto recu_strftime;
+ s = strptime(s, "%H:%M", tm);
+ if (!s) return 0;
+ break;
case 'S':
- val = tm->tm_sec;
- fmt = "%02d";
- goto number;
+ dest = &tm->tm_sec;
+ min = 0;
+ range = 61;
+ goto numeric_range;
case 'T':
- fmt = "%H:%M:%S";
- goto recu_strftime;
- case 'u':
- val = tm->tm_wday ? tm->tm_wday : 7;
- fmt = "%d";
- goto number;
+ s = strptime(s, "%H:%M:%S", tm);
+ if (!s) return 0;
+ break;
case 'U':
- case 'V':
case 'W':
- // FIXME: week number mess..
- continue;
+ //FIXME
+ return 0;
case 'w':
- val = tm->tm_wday;
- fmt = "%d";
- goto number;
+ dest = &tm->tm_wday;
+ min = 0;
+ range = 7;
+ goto numeric_range;
case 'x':
- item = D_FMT;
- goto nl_strftime;
+ s = strptime(s, nl_langinfo(D_FMT), tm);
+ if (!s) return 0;
+ break;
case 'X':
- item = T_FMT;
- goto nl_strftime;
+ s = strptime(s, nl_langinfo(T_FMT), tm);
+ if (!s) return 0;
+ break;
case 'y':
- val = tm->tm_year % 100;
- fmt = "%02d";
- goto number;
+ //FIXME
+ return 0;
case 'Y':
- val = tm->tm_year + 1900;
- fmt = "%04d";
- goto number;
- case 'z':
- if (tm->tm_isdst < 0) continue;
- val = timezone + (tm->tm_isdst) ? __dst_offset : 0;
- l += snprintf(s+l, n-l, "%+02d%02d", val/60, abs(val%60));
- continue;
- case 'Z':
- if (tm->tm_isdst < 0 || !tzname[0] || !tzname[0][0])
- continue;
- l += snprintf(s+l, n-l, "%s", tzname[!!tm->tm_isdst]);
- continue;
- }
- default:
- return NULL;
+ dest = &tm->tm_year;
+ if (w<0) w=4;
+ adj = 1900;
+ goto numeric_digits;
+ case '%':
+ if (*s++ != '%') return 0;
+ break;
+ 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 (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;
+ *dest = i % range;
+ break;
+ }
+ if (i<0) return 0;
+ goto update;
+ update:
+ //FIXME
+ ;
}
-literal:
- if (*s++ != *f) return NULL;
- continue;
-whitespace:
- while(isspace(*s)) s++;
- continue;
-number:
- l += snprintf(s+l, n-l, fmt, val);
- continue;
-nl_strcat:
- l += snprintf(s+l, n-l, "%s", __langinfo(item));
- continue;
-nl_strftime:
- fmt = __langinfo(item);
-recu_strftime:
- l += strftime(s+l, n-l, fmt, tm);
}
- if (l >= n) return 0;
- s[l] = 0;
- return l;
+ return (char *)s;
}
-
-#endif
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-10 18:14:08 +0000