* Copyright (C) Linus Torvalds, 2005
*/
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
#include <time.h>
+#include "cache.h"
+
static time_t my_mktime(struct tm *tm)
{
static const int mdays[] = {
"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"
};
+/*
+ * The "tz" thing is passed in as this strange "decimal parse of tz"
+ * thing, which means that tz -0100 is passed in as the integer -100,
+ * even though it means "sixty minutes off"
+ */
+const char *show_date(unsigned long time, int tz)
+{
+ struct tm *tm;
+ time_t t;
+ static char timebuf[200];
+ int minutes;
+
+ minutes = tz < 0 ? -tz : tz;
+ minutes = (minutes / 100)*60 + (minutes % 100);
+ minutes = tz < 0 ? -minutes : minutes;
+ t = time + minutes * 60;
+ tm = gmtime(&t);
+ if (!tm)
+ return NULL;
+ sprintf(timebuf, "%.3s %.3s %d %02d:%02d:%02d %d %+05d",
+ weekday_names[tm->tm_wday],
+ month_names[tm->tm_mon],
+ tm->tm_mday,
+ tm->tm_hour, tm->tm_min, tm->tm_sec,
+ tm->tm_year + 1900, tz);
+ return timebuf;
+}
+
/*
* Check these. And note how it doesn't do the summer-time conversion.
*
return i;
}
+static int skip_alpha(const char *date)
+{
+ int i = 0;
+ do {
+ i++;
+ } while (isalpha(date[i]));
+ return i;
+}
+
/*
* Parse month, weekday, or timezone name
*/
}
}
+ if (match_string(date, "PM") == 2) {
+ if (tm->tm_hour > 0 && tm->tm_hour < 12)
+ tm->tm_hour += 12;
+ return 2;
+ }
+
/* BAD CRAP */
- return 0;
+ return skip_alpha(date);
}
static int is_date(int year, int month, int day, struct tm *tm)
return 0;
}
-static int match_multi_number(unsigned long num, char c, char *date, char *end, struct tm *tm)
+static int match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm)
{
long num2, num3;
/*
* We've seen a digit. Time? Year? Date?
*/
-static int match_digit(char *date, struct tm *tm, int *offset)
+static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt)
{
int n;
char *end;
*/
if (num > 946684800) {
time_t time = num;
- if (gmtime_r(&time, tm))
+ if (gmtime_r(&time, tm)) {
+ *tm_gmt = 1;
return end - date;
+ }
}
/*
return n;
}
-static int match_tz(char *date, int *offp)
+static int match_tz(const char *date, int *offp)
{
char *end;
int offset = strtoul(date+1, &end, 10);
* a valid minute. We might want to check that the minutes
* are divisible by 30 or something too.
*/
- if (min >= 60 || n < 3)
- return 0;
+ if (min < 60 && n > 2) {
+ offset = hour*60+min;
+ if (*date == '-')
+ offset = -offset;
- offset = hour*60+min;
- if (*date == '-')
- offset = -offset;
-
- *offp = offset;
+ *offp = offset;
+ }
return end - date;
}
+static int date_string(unsigned long date, int offset, char *buf, int len)
+{
+ int sign = '+';
+
+ if (offset < 0) {
+ offset = -offset;
+ sign = '-';
+ }
+ return snprintf(buf, len, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60);
+}
+
/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
(i.e. English) day/month names, and it doesn't work correctly with %z. */
-void parse_date(char *date, char *result, int maxlen)
+int parse_date(const char *date, char *result, int maxlen)
{
struct tm tm;
- int offset, sign;
+ int offset, tm_gmt;
time_t then;
memset(&tm, 0, sizeof(tm));
tm.tm_mday = -1;
tm.tm_isdst = -1;
offset = -1;
+ tm_gmt = 0;
for (;;) {
int match = 0;
if (isalpha(c))
match = match_alpha(date, &tm, &offset);
else if (isdigit(c))
- match = match_digit(date, &tm, &offset);
+ match = match_digit(date, &tm, &offset, &tm_gmt);
else if ((c == '-' || c == '+') && isdigit(date[1]))
match = match_tz(date, &offset);
offset = (then - mktime(&tm)) / 60;
if (then == -1)
- return;
-
- then -= offset * 60;
-
- sign = '+';
- if (offset < 0) {
- offset = -offset;
- sign = '-';
- }
+ return -1;
- snprintf(result, maxlen, "%lu %c%02d%02d", then, sign, offset/60, offset % 60);
+ if (!tm_gmt)
+ then -= offset * 60;
+ return date_string(then, offset, result, maxlen);
}
void datestamp(char *buf, int bufsize)
offset = my_mktime(localtime(&now)) - now;
offset /= 60;
- snprintf(buf, bufsize, "%lu %+05d", now, offset/60*100 + offset%60);
+ date_string(now, offset, buf, bufsize);
}