mirror of
https://github.com/git/git.git
synced 2024-12-29 19:54:54 +08:00
9a0231b395
In 1.7.9 era, we taught "git rebase" about the raw timestamp format but we did not teach the same trick to "filter-branch", which rolled a similar logic on its own. Because of this, "filter-branch" failed to rewrite commits with ancient timestamps. * jc/maint-filter-branch-epoch-date: t7003: add test to filter a branch with a commit at epoch date.c: Fix off by one error in object-header date parsing filter-branch: do not forget the '@' prefix to force git-timestamp
1088 lines
24 KiB
C
1088 lines
24 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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/*
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* This is like mktime, but without normalization of tm_wday and tm_yday.
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*/
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static time_t tm_to_time_t(const struct tm *tm)
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{
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static const int mdays[] = {
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0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
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};
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int year = tm->tm_year - 70;
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int month = tm->tm_mon;
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int day = tm->tm_mday;
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if (year < 0 || year > 129) /* algo only works for 1970-2099 */
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return -1;
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if (month < 0 || month > 11) /* array bounds */
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return -1;
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if (month < 2 || (year + 2) % 4)
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day--;
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if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0)
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return -1;
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return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL +
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tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec;
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}
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static const char *month_names[] = {
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"January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November", "December"
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};
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static const char *weekday_names[] = {
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"Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays"
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};
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static time_t gm_time_t(unsigned long time, int tz)
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{
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int minutes;
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minutes = tz < 0 ? -tz : tz;
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minutes = (minutes / 100)*60 + (minutes % 100);
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minutes = tz < 0 ? -minutes : minutes;
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return time + minutes * 60;
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}
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/*
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* The "tz" thing is passed in as this strange "decimal parse of tz"
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* thing, which means that tz -0100 is passed in as the integer -100,
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* even though it means "sixty minutes off"
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*/
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static struct tm *time_to_tm(unsigned long time, int tz)
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{
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time_t t = gm_time_t(time, tz);
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return gmtime(&t);
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}
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/*
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* What value of "tz" was in effect back then at "time" in the
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* local timezone?
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*/
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static int local_tzoffset(unsigned long time)
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{
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time_t t, t_local;
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struct tm tm;
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int offset, eastwest;
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t = time;
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localtime_r(&t, &tm);
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t_local = tm_to_time_t(&tm);
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if (t_local < t) {
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eastwest = -1;
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offset = t - t_local;
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} else {
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eastwest = 1;
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offset = t_local - t;
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}
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offset /= 60; /* in minutes */
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offset = (offset % 60) + ((offset / 60) * 100);
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return offset * eastwest;
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}
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void show_date_relative(unsigned long time, int tz,
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const struct timeval *now,
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struct strbuf *timebuf)
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{
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unsigned long diff;
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if (now->tv_sec < time) {
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strbuf_addstr(timebuf, _("in the future"));
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return;
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}
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diff = now->tv_sec - time;
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if (diff < 90) {
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strbuf_addf(timebuf,
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Q_("%lu second ago", "%lu seconds ago", diff), diff);
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return;
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}
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/* Turn it into minutes */
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diff = (diff + 30) / 60;
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if (diff < 90) {
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strbuf_addf(timebuf,
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Q_("%lu minute ago", "%lu minutes ago", diff), diff);
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return;
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}
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/* Turn it into hours */
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diff = (diff + 30) / 60;
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if (diff < 36) {
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strbuf_addf(timebuf,
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Q_("%lu hour ago", "%lu hours ago", diff), diff);
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return;
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}
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/* We deal with number of days from here on */
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diff = (diff + 12) / 24;
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if (diff < 14) {
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strbuf_addf(timebuf,
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Q_("%lu day ago", "%lu days ago", diff), diff);
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return;
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}
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/* Say weeks for the past 10 weeks or so */
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if (diff < 70) {
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strbuf_addf(timebuf,
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Q_("%lu week ago", "%lu weeks ago", (diff + 3) / 7),
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(diff + 3) / 7);
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return;
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}
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/* Say months for the past 12 months or so */
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if (diff < 365) {
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strbuf_addf(timebuf,
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Q_("%lu month ago", "%lu months ago", (diff + 15) / 30),
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(diff + 15) / 30);
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return;
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}
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/* Give years and months for 5 years or so */
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if (diff < 1825) {
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unsigned long totalmonths = (diff * 12 * 2 + 365) / (365 * 2);
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unsigned long years = totalmonths / 12;
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unsigned long months = totalmonths % 12;
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if (months) {
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struct strbuf sb = STRBUF_INIT;
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strbuf_addf(&sb, Q_("%lu year", "%lu years", years), years);
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/* TRANSLATORS: "%s" is "<n> years" */
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strbuf_addf(timebuf,
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Q_("%s, %lu month ago", "%s, %lu months ago", months),
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sb.buf, months);
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strbuf_release(&sb);
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} else
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strbuf_addf(timebuf,
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Q_("%lu year ago", "%lu years ago", years), years);
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return;
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}
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/* Otherwise, just years. Centuries is probably overkill. */
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strbuf_addf(timebuf,
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Q_("%lu year ago", "%lu years ago", (diff + 183) / 365),
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(diff + 183) / 365);
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}
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const char *show_date(unsigned long time, int tz, enum date_mode mode)
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{
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struct tm *tm;
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static struct strbuf timebuf = STRBUF_INIT;
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if (mode == DATE_RAW) {
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strbuf_reset(&timebuf);
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strbuf_addf(&timebuf, "%lu %+05d", time, tz);
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return timebuf.buf;
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}
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if (mode == DATE_RELATIVE) {
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struct timeval now;
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strbuf_reset(&timebuf);
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gettimeofday(&now, NULL);
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show_date_relative(time, tz, &now, &timebuf);
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return timebuf.buf;
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}
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if (mode == DATE_LOCAL)
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tz = local_tzoffset(time);
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tm = time_to_tm(time, tz);
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if (!tm)
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return NULL;
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strbuf_reset(&timebuf);
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if (mode == DATE_SHORT)
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strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900,
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tm->tm_mon + 1, tm->tm_mday);
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else if (mode == DATE_ISO8601)
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strbuf_addf(&timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d",
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tm->tm_year + 1900,
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tm->tm_mon + 1,
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tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec,
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tz);
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else if (mode == DATE_RFC2822)
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strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d",
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weekday_names[tm->tm_wday], tm->tm_mday,
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month_names[tm->tm_mon], tm->tm_year + 1900,
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tm->tm_hour, tm->tm_min, tm->tm_sec, tz);
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else
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strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d",
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weekday_names[tm->tm_wday],
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month_names[tm->tm_mon],
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tm->tm_mday,
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tm->tm_hour, tm->tm_min, tm->tm_sec,
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tm->tm_year + 1900,
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(mode == DATE_LOCAL) ? 0 : ' ',
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tz);
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return timebuf.buf;
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}
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/*
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* Check these. And note how it doesn't do the summer-time conversion.
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*
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* In my world, it's always summer, and things are probably a bit off
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* in other ways too.
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*/
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static const struct {
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const char *name;
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int offset;
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int dst;
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} timezone_names[] = {
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{ "IDLW", -12, 0, }, /* International Date Line West */
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{ "NT", -11, 0, }, /* Nome */
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{ "CAT", -10, 0, }, /* Central Alaska */
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{ "HST", -10, 0, }, /* Hawaii Standard */
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{ "HDT", -10, 1, }, /* Hawaii Daylight */
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{ "YST", -9, 0, }, /* Yukon Standard */
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{ "YDT", -9, 1, }, /* Yukon Daylight */
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{ "PST", -8, 0, }, /* Pacific Standard */
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{ "PDT", -8, 1, }, /* Pacific Daylight */
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{ "MST", -7, 0, }, /* Mountain Standard */
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{ "MDT", -7, 1, }, /* Mountain Daylight */
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{ "CST", -6, 0, }, /* Central Standard */
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{ "CDT", -6, 1, }, /* Central Daylight */
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{ "EST", -5, 0, }, /* Eastern Standard */
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{ "EDT", -5, 1, }, /* Eastern Daylight */
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{ "AST", -3, 0, }, /* Atlantic Standard */
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{ "ADT", -3, 1, }, /* Atlantic Daylight */
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{ "WAT", -1, 0, }, /* West Africa */
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{ "GMT", 0, 0, }, /* Greenwich Mean */
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{ "UTC", 0, 0, }, /* Universal (Coordinated) */
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{ "Z", 0, 0, }, /* Zulu, alias for UTC */
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{ "WET", 0, 0, }, /* Western European */
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{ "BST", 0, 1, }, /* British Summer */
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{ "CET", +1, 0, }, /* Central European */
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{ "MET", +1, 0, }, /* Middle European */
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{ "MEWT", +1, 0, }, /* Middle European Winter */
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{ "MEST", +1, 1, }, /* Middle European Summer */
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{ "CEST", +1, 1, }, /* Central European Summer */
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{ "MESZ", +1, 1, }, /* Middle European Summer */
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{ "FWT", +1, 0, }, /* French Winter */
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{ "FST", +1, 1, }, /* French Summer */
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{ "EET", +2, 0, }, /* Eastern Europe, USSR Zone 1 */
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{ "EEST", +2, 1, }, /* Eastern European Daylight */
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{ "WAST", +7, 0, }, /* West Australian Standard */
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{ "WADT", +7, 1, }, /* West Australian Daylight */
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{ "CCT", +8, 0, }, /* China Coast, USSR Zone 7 */
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{ "JST", +9, 0, }, /* Japan Standard, USSR Zone 8 */
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{ "EAST", +10, 0, }, /* Eastern Australian Standard */
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{ "EADT", +10, 1, }, /* Eastern Australian Daylight */
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{ "GST", +10, 0, }, /* Guam Standard, USSR Zone 9 */
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{ "NZT", +12, 0, }, /* New Zealand */
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{ "NZST", +12, 0, }, /* New Zealand Standard */
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{ "NZDT", +12, 1, }, /* New Zealand Daylight */
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{ "IDLE", +12, 0, }, /* International Date Line East */
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};
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static int match_string(const char *date, const char *str)
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{
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int i = 0;
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for (i = 0; *date; date++, str++, i++) {
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if (*date == *str)
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continue;
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if (toupper(*date) == toupper(*str))
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continue;
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if (!isalnum(*date))
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break;
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return 0;
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}
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return i;
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}
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static int skip_alpha(const char *date)
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{
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int i = 0;
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do {
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i++;
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} while (isalpha(date[i]));
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return i;
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}
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/*
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* Parse month, weekday, or timezone name
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*/
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static int match_alpha(const char *date, struct tm *tm, int *offset)
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{
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int i;
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for (i = 0; i < 12; i++) {
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int match = match_string(date, month_names[i]);
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if (match >= 3) {
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tm->tm_mon = i;
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return match;
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}
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}
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for (i = 0; i < 7; i++) {
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int match = match_string(date, weekday_names[i]);
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if (match >= 3) {
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tm->tm_wday = i;
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return match;
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}
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}
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for (i = 0; i < ARRAY_SIZE(timezone_names); i++) {
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int match = match_string(date, timezone_names[i].name);
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if (match >= 3 || match == strlen(timezone_names[i].name)) {
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int off = timezone_names[i].offset;
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/* This is bogus, but we like summer */
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off += timezone_names[i].dst;
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/* Only use the tz name offset if we don't have anything better */
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if (*offset == -1)
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*offset = 60*off;
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return match;
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}
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}
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if (match_string(date, "PM") == 2) {
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tm->tm_hour = (tm->tm_hour % 12) + 12;
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return 2;
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}
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if (match_string(date, "AM") == 2) {
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tm->tm_hour = (tm->tm_hour % 12) + 0;
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return 2;
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}
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/* BAD CRAP */
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return skip_alpha(date);
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}
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static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm)
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{
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if (month > 0 && month < 13 && day > 0 && day < 32) {
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struct tm check = *tm;
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struct tm *r = (now_tm ? &check : tm);
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time_t specified;
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r->tm_mon = month - 1;
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r->tm_mday = day;
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if (year == -1) {
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if (!now_tm)
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return 1;
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r->tm_year = now_tm->tm_year;
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}
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else if (year >= 1970 && year < 2100)
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r->tm_year = year - 1900;
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else if (year > 70 && year < 100)
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r->tm_year = year;
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else if (year < 38)
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r->tm_year = year + 100;
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else
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return 0;
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if (!now_tm)
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return 1;
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specified = tm_to_time_t(r);
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/* Be it commit time or author time, it does not make
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* sense to specify timestamp way into the future. Make
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* sure it is not later than ten days from now...
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*/
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if (now + 10*24*3600 < specified)
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return 0;
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tm->tm_mon = r->tm_mon;
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tm->tm_mday = r->tm_mday;
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if (year != -1)
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tm->tm_year = r->tm_year;
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return 1;
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}
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return 0;
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}
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static int match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm)
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{
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time_t now;
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struct tm now_tm;
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struct tm *refuse_future;
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long num2, num3;
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num2 = strtol(end+1, &end, 10);
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num3 = -1;
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if (*end == c && isdigit(end[1]))
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num3 = strtol(end+1, &end, 10);
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/* Time? Date? */
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switch (c) {
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case ':':
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if (num3 < 0)
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num3 = 0;
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if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) {
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tm->tm_hour = num;
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tm->tm_min = num2;
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tm->tm_sec = num3;
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break;
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}
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return 0;
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case '-':
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case '/':
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case '.':
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now = time(NULL);
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refuse_future = NULL;
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if (gmtime_r(&now, &now_tm))
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refuse_future = &now_tm;
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if (num > 70) {
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/* yyyy-mm-dd? */
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if (is_date(num, num2, num3, refuse_future, now, tm))
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break;
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/* yyyy-dd-mm? */
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if (is_date(num, num3, num2, refuse_future, now, tm))
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break;
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}
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/* Our eastern European friends say dd.mm.yy[yy]
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* is the norm there, so giving precedence to
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* mm/dd/yy[yy] form only when separator is not '.'
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*/
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if (c != '.' &&
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is_date(num3, num, num2, refuse_future, now, tm))
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break;
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/* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */
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if (is_date(num3, num2, num, refuse_future, now, tm))
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break;
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/* Funny European mm.dd.yy */
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if (c == '.' &&
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is_date(num3, num, num2, refuse_future, now, tm))
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break;
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return 0;
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}
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return end - date;
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}
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/*
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* Have we filled in any part of the time/date yet?
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* We just do a binary 'and' to see if the sign bit
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* is set in all the values.
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*/
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static inline int nodate(struct tm *tm)
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{
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return (tm->tm_year &
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tm->tm_mon &
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tm->tm_mday &
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tm->tm_hour &
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tm->tm_min &
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tm->tm_sec) < 0;
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}
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|
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/*
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* We've seen a digit. Time? Year? Date?
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*/
|
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static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt)
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{
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int n;
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char *end;
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unsigned long num;
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num = strtoul(date, &end, 10);
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|
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/*
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* Seconds since 1970? We trigger on that for any numbers with
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* more than 8 digits. This is because we don't want to rule out
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* numbers like 20070606 as a YYYYMMDD date.
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*/
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if (num >= 100000000 && nodate(tm)) {
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time_t time = num;
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if (gmtime_r(&time, tm)) {
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*tm_gmt = 1;
|
|
return end - date;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check for special formats: num[-.:/]num[same]num
|
|
*/
|
|
switch (*end) {
|
|
case ':':
|
|
case '.':
|
|
case '/':
|
|
case '-':
|
|
if (isdigit(end[1])) {
|
|
int match = match_multi_number(num, *end, date, end, tm);
|
|
if (match)
|
|
return match;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* None of the special formats? Try to guess what
|
|
* the number meant. We use the number of digits
|
|
* to make a more educated guess..
|
|
*/
|
|
n = 0;
|
|
do {
|
|
n++;
|
|
} while (isdigit(date[n]));
|
|
|
|
/* Four-digit year or a timezone? */
|
|
if (n == 4) {
|
|
if (num <= 1400 && *offset == -1) {
|
|
unsigned int minutes = num % 100;
|
|
unsigned int hours = num / 100;
|
|
*offset = hours*60 + minutes;
|
|
} else if (num > 1900 && num < 2100)
|
|
tm->tm_year = num - 1900;
|
|
return n;
|
|
}
|
|
|
|
/*
|
|
* Ignore lots of numerals. We took care of 4-digit years above.
|
|
* Days or months must be one or two digits.
|
|
*/
|
|
if (n > 2)
|
|
return n;
|
|
|
|
/*
|
|
* NOTE! We will give precedence to day-of-month over month or
|
|
* year numbers in the 1-12 range. So 05 is always "mday 5",
|
|
* unless we already have a mday..
|
|
*
|
|
* IOW, 01 Apr 05 parses as "April 1st, 2005".
|
|
*/
|
|
if (num > 0 && num < 32 && tm->tm_mday < 0) {
|
|
tm->tm_mday = num;
|
|
return n;
|
|
}
|
|
|
|
/* Two-digit year? */
|
|
if (n == 2 && tm->tm_year < 0) {
|
|
if (num < 10 && tm->tm_mday >= 0) {
|
|
tm->tm_year = num + 100;
|
|
return n;
|
|
}
|
|
if (num >= 70) {
|
|
tm->tm_year = num;
|
|
return n;
|
|
}
|
|
}
|
|
|
|
if (num > 0 && num < 13 && tm->tm_mon < 0)
|
|
tm->tm_mon = num-1;
|
|
|
|
return n;
|
|
}
|
|
|
|
static int match_tz(const char *date, int *offp)
|
|
{
|
|
char *end;
|
|
int hour = strtoul(date + 1, &end, 10);
|
|
int n = end - (date + 1);
|
|
int min = 0;
|
|
|
|
if (n == 4) {
|
|
/* hhmm */
|
|
min = hour % 100;
|
|
hour = hour / 100;
|
|
} else if (n != 2) {
|
|
min = 99; /* random crap */
|
|
} else if (*end == ':') {
|
|
/* hh:mm? */
|
|
min = strtoul(end + 1, &end, 10);
|
|
if (end - (date + 1) != 5)
|
|
min = 99; /* random crap */
|
|
} /* otherwise we parsed "hh" */
|
|
|
|
/*
|
|
* Don't accept any random crap. Even though some places have
|
|
* offset larger than 12 hours (e.g. Pacific/Kiritimati is at
|
|
* UTC+14), there is something wrong if hour part is much
|
|
* larger than that. We might also want to check that the
|
|
* minutes are divisible by 15 or something too. (Offset of
|
|
* Kathmandu, Nepal is UTC+5:45)
|
|
*/
|
|
if (min < 60 && hour < 24) {
|
|
int offset = hour * 60 + min;
|
|
if (*date == '-')
|
|
offset = -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);
|
|
}
|
|
|
|
/*
|
|
* Parse a string like "0 +0000" as ancient timestamp near epoch, but
|
|
* only when it appears not as part of any other string.
|
|
*/
|
|
static int match_object_header_date(const char *date, unsigned long *timestamp, int *offset)
|
|
{
|
|
char *end;
|
|
unsigned long stamp;
|
|
int ofs;
|
|
|
|
if (*date < '0' || '9' < *date)
|
|
return -1;
|
|
stamp = strtoul(date, &end, 10);
|
|
if (*end != ' ' || stamp == ULONG_MAX || (end[1] != '+' && end[1] != '-'))
|
|
return -1;
|
|
date = end + 2;
|
|
ofs = strtol(date, &end, 10);
|
|
if ((*end != '\0' && (*end != '\n')) || end != date + 4)
|
|
return -1;
|
|
ofs = (ofs / 100) * 60 + (ofs % 100);
|
|
if (date[-1] == '-')
|
|
ofs = -ofs;
|
|
*timestamp = stamp;
|
|
*offset = ofs;
|
|
return 0;
|
|
}
|
|
|
|
/* 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. */
|
|
int parse_date_basic(const char *date, unsigned long *timestamp, int *offset)
|
|
{
|
|
struct tm tm;
|
|
int tm_gmt;
|
|
unsigned long dummy_timestamp;
|
|
int dummy_offset;
|
|
|
|
if (!timestamp)
|
|
timestamp = &dummy_timestamp;
|
|
if (!offset)
|
|
offset = &dummy_offset;
|
|
|
|
memset(&tm, 0, sizeof(tm));
|
|
tm.tm_year = -1;
|
|
tm.tm_mon = -1;
|
|
tm.tm_mday = -1;
|
|
tm.tm_isdst = -1;
|
|
tm.tm_hour = -1;
|
|
tm.tm_min = -1;
|
|
tm.tm_sec = -1;
|
|
*offset = -1;
|
|
tm_gmt = 0;
|
|
|
|
if (*date == '@' &&
|
|
!match_object_header_date(date + 1, timestamp, offset))
|
|
return 0; /* success */
|
|
for (;;) {
|
|
int match = 0;
|
|
unsigned char c = *date;
|
|
|
|
/* Stop at end of string or newline */
|
|
if (!c || c == '\n')
|
|
break;
|
|
|
|
if (isalpha(c))
|
|
match = match_alpha(date, &tm, offset);
|
|
else if (isdigit(c))
|
|
match = match_digit(date, &tm, offset, &tm_gmt);
|
|
else if ((c == '-' || c == '+') && isdigit(date[1]))
|
|
match = match_tz(date, offset);
|
|
|
|
if (!match) {
|
|
/* BAD CRAP */
|
|
match = 1;
|
|
}
|
|
|
|
date += match;
|
|
}
|
|
|
|
/* mktime uses local timezone */
|
|
*timestamp = tm_to_time_t(&tm);
|
|
if (*offset == -1)
|
|
*offset = ((time_t)*timestamp - mktime(&tm)) / 60;
|
|
|
|
if (*timestamp == -1)
|
|
return -1;
|
|
|
|
if (!tm_gmt)
|
|
*timestamp -= *offset * 60;
|
|
return 0; /* success */
|
|
}
|
|
|
|
int parse_date(const char *date, char *result, int maxlen)
|
|
{
|
|
unsigned long timestamp;
|
|
int offset;
|
|
if (parse_date_basic(date, ×tamp, &offset))
|
|
return -1;
|
|
return date_string(timestamp, offset, result, maxlen);
|
|
}
|
|
|
|
enum date_mode parse_date_format(const char *format)
|
|
{
|
|
if (!strcmp(format, "relative"))
|
|
return DATE_RELATIVE;
|
|
else if (!strcmp(format, "iso8601") ||
|
|
!strcmp(format, "iso"))
|
|
return DATE_ISO8601;
|
|
else if (!strcmp(format, "rfc2822") ||
|
|
!strcmp(format, "rfc"))
|
|
return DATE_RFC2822;
|
|
else if (!strcmp(format, "short"))
|
|
return DATE_SHORT;
|
|
else if (!strcmp(format, "local"))
|
|
return DATE_LOCAL;
|
|
else if (!strcmp(format, "default"))
|
|
return DATE_NORMAL;
|
|
else if (!strcmp(format, "raw"))
|
|
return DATE_RAW;
|
|
else
|
|
die("unknown date format %s", format);
|
|
}
|
|
|
|
void datestamp(char *buf, int bufsize)
|
|
{
|
|
time_t now;
|
|
int offset;
|
|
|
|
time(&now);
|
|
|
|
offset = tm_to_time_t(localtime(&now)) - now;
|
|
offset /= 60;
|
|
|
|
date_string(now, offset, buf, bufsize);
|
|
}
|
|
|
|
/*
|
|
* Relative time update (eg "2 days ago"). If we haven't set the time
|
|
* yet, we need to set it from current time.
|
|
*/
|
|
static unsigned long update_tm(struct tm *tm, struct tm *now, unsigned long sec)
|
|
{
|
|
time_t n;
|
|
|
|
if (tm->tm_mday < 0)
|
|
tm->tm_mday = now->tm_mday;
|
|
if (tm->tm_mon < 0)
|
|
tm->tm_mon = now->tm_mon;
|
|
if (tm->tm_year < 0) {
|
|
tm->tm_year = now->tm_year;
|
|
if (tm->tm_mon > now->tm_mon)
|
|
tm->tm_year--;
|
|
}
|
|
|
|
n = mktime(tm) - sec;
|
|
localtime_r(&n, tm);
|
|
return n;
|
|
}
|
|
|
|
static void date_now(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
update_tm(tm, now, 0);
|
|
}
|
|
|
|
static void date_yesterday(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
update_tm(tm, now, 24*60*60);
|
|
}
|
|
|
|
static void date_time(struct tm *tm, struct tm *now, int hour)
|
|
{
|
|
if (tm->tm_hour < hour)
|
|
date_yesterday(tm, now, NULL);
|
|
tm->tm_hour = hour;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
}
|
|
|
|
static void date_midnight(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
date_time(tm, now, 0);
|
|
}
|
|
|
|
static void date_noon(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
date_time(tm, now, 12);
|
|
}
|
|
|
|
static void date_tea(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
date_time(tm, now, 17);
|
|
}
|
|
|
|
static void date_pm(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
int hour, n = *num;
|
|
*num = 0;
|
|
|
|
hour = tm->tm_hour;
|
|
if (n) {
|
|
hour = n;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
}
|
|
tm->tm_hour = (hour % 12) + 12;
|
|
}
|
|
|
|
static void date_am(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
int hour, n = *num;
|
|
*num = 0;
|
|
|
|
hour = tm->tm_hour;
|
|
if (n) {
|
|
hour = n;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
}
|
|
tm->tm_hour = (hour % 12);
|
|
}
|
|
|
|
static void date_never(struct tm *tm, struct tm *now, int *num)
|
|
{
|
|
time_t n = 0;
|
|
localtime_r(&n, tm);
|
|
}
|
|
|
|
static const struct special {
|
|
const char *name;
|
|
void (*fn)(struct tm *, struct tm *, int *);
|
|
} special[] = {
|
|
{ "yesterday", date_yesterday },
|
|
{ "noon", date_noon },
|
|
{ "midnight", date_midnight },
|
|
{ "tea", date_tea },
|
|
{ "PM", date_pm },
|
|
{ "AM", date_am },
|
|
{ "never", date_never },
|
|
{ "now", date_now },
|
|
{ NULL }
|
|
};
|
|
|
|
static const char *number_name[] = {
|
|
"zero", "one", "two", "three", "four",
|
|
"five", "six", "seven", "eight", "nine", "ten",
|
|
};
|
|
|
|
static const struct typelen {
|
|
const char *type;
|
|
int length;
|
|
} typelen[] = {
|
|
{ "seconds", 1 },
|
|
{ "minutes", 60 },
|
|
{ "hours", 60*60 },
|
|
{ "days", 24*60*60 },
|
|
{ "weeks", 7*24*60*60 },
|
|
{ NULL }
|
|
};
|
|
|
|
static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched)
|
|
{
|
|
const struct typelen *tl;
|
|
const struct special *s;
|
|
const char *end = date;
|
|
int i;
|
|
|
|
while (isalpha(*++end));
|
|
;
|
|
|
|
for (i = 0; i < 12; i++) {
|
|
int match = match_string(date, month_names[i]);
|
|
if (match >= 3) {
|
|
tm->tm_mon = i;
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
}
|
|
|
|
for (s = special; s->name; s++) {
|
|
int len = strlen(s->name);
|
|
if (match_string(date, s->name) == len) {
|
|
s->fn(tm, now, num);
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
}
|
|
|
|
if (!*num) {
|
|
for (i = 1; i < 11; i++) {
|
|
int len = strlen(number_name[i]);
|
|
if (match_string(date, number_name[i]) == len) {
|
|
*num = i;
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
}
|
|
if (match_string(date, "last") == 4) {
|
|
*num = 1;
|
|
*touched = 1;
|
|
}
|
|
return end;
|
|
}
|
|
|
|
tl = typelen;
|
|
while (tl->type) {
|
|
int len = strlen(tl->type);
|
|
if (match_string(date, tl->type) >= len-1) {
|
|
update_tm(tm, now, tl->length * *num);
|
|
*num = 0;
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
tl++;
|
|
}
|
|
|
|
for (i = 0; i < 7; i++) {
|
|
int match = match_string(date, weekday_names[i]);
|
|
if (match >= 3) {
|
|
int diff, n = *num -1;
|
|
*num = 0;
|
|
|
|
diff = tm->tm_wday - i;
|
|
if (diff <= 0)
|
|
n++;
|
|
diff += 7*n;
|
|
|
|
update_tm(tm, now, diff * 24 * 60 * 60);
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
}
|
|
|
|
if (match_string(date, "months") >= 5) {
|
|
int n;
|
|
update_tm(tm, now, 0); /* fill in date fields if needed */
|
|
n = tm->tm_mon - *num;
|
|
*num = 0;
|
|
while (n < 0) {
|
|
n += 12;
|
|
tm->tm_year--;
|
|
}
|
|
tm->tm_mon = n;
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
|
|
if (match_string(date, "years") >= 4) {
|
|
update_tm(tm, now, 0); /* fill in date fields if needed */
|
|
tm->tm_year -= *num;
|
|
*num = 0;
|
|
*touched = 1;
|
|
return end;
|
|
}
|
|
|
|
return end;
|
|
}
|
|
|
|
static const char *approxidate_digit(const char *date, struct tm *tm, int *num)
|
|
{
|
|
char *end;
|
|
unsigned long number = strtoul(date, &end, 10);
|
|
|
|
switch (*end) {
|
|
case ':':
|
|
case '.':
|
|
case '/':
|
|
case '-':
|
|
if (isdigit(end[1])) {
|
|
int match = match_multi_number(number, *end, date, end, tm);
|
|
if (match)
|
|
return date + match;
|
|
}
|
|
}
|
|
|
|
/* Accept zero-padding only for small numbers ("Dec 02", never "Dec 0002") */
|
|
if (date[0] != '0' || end - date <= 2)
|
|
*num = number;
|
|
return end;
|
|
}
|
|
|
|
/*
|
|
* Do we have a pending number at the end, or when
|
|
* we see a new one? Let's assume it's a month day,
|
|
* as in "Dec 6, 1992"
|
|
*/
|
|
static void pending_number(struct tm *tm, int *num)
|
|
{
|
|
int number = *num;
|
|
|
|
if (number) {
|
|
*num = 0;
|
|
if (tm->tm_mday < 0 && number < 32)
|
|
tm->tm_mday = number;
|
|
else if (tm->tm_mon < 0 && number < 13)
|
|
tm->tm_mon = number-1;
|
|
else if (tm->tm_year < 0) {
|
|
if (number > 1969 && number < 2100)
|
|
tm->tm_year = number - 1900;
|
|
else if (number > 69 && number < 100)
|
|
tm->tm_year = number;
|
|
else if (number < 38)
|
|
tm->tm_year = 100 + number;
|
|
/* We screw up for number = 00 ? */
|
|
}
|
|
}
|
|
}
|
|
|
|
static unsigned long approxidate_str(const char *date,
|
|
const struct timeval *tv,
|
|
int *error_ret)
|
|
{
|
|
int number = 0;
|
|
int touched = 0;
|
|
struct tm tm, now;
|
|
time_t time_sec;
|
|
|
|
time_sec = tv->tv_sec;
|
|
localtime_r(&time_sec, &tm);
|
|
now = tm;
|
|
|
|
tm.tm_year = -1;
|
|
tm.tm_mon = -1;
|
|
tm.tm_mday = -1;
|
|
|
|
for (;;) {
|
|
unsigned char c = *date;
|
|
if (!c)
|
|
break;
|
|
date++;
|
|
if (isdigit(c)) {
|
|
pending_number(&tm, &number);
|
|
date = approxidate_digit(date-1, &tm, &number);
|
|
touched = 1;
|
|
continue;
|
|
}
|
|
if (isalpha(c))
|
|
date = approxidate_alpha(date-1, &tm, &now, &number, &touched);
|
|
}
|
|
pending_number(&tm, &number);
|
|
if (!touched)
|
|
*error_ret = 1;
|
|
return update_tm(&tm, &now, 0);
|
|
}
|
|
|
|
unsigned long approxidate_relative(const char *date, const struct timeval *tv)
|
|
{
|
|
unsigned long timestamp;
|
|
int offset;
|
|
int errors = 0;
|
|
|
|
if (!parse_date_basic(date, ×tamp, &offset))
|
|
return timestamp;
|
|
return approxidate_str(date, tv, &errors);
|
|
}
|
|
|
|
unsigned long approxidate_careful(const char *date, int *error_ret)
|
|
{
|
|
struct timeval tv;
|
|
unsigned long timestamp;
|
|
int offset;
|
|
int dummy = 0;
|
|
if (!error_ret)
|
|
error_ret = &dummy;
|
|
|
|
if (!parse_date_basic(date, ×tamp, &offset)) {
|
|
*error_ret = 0;
|
|
return timestamp;
|
|
}
|
|
|
|
gettimeofday(&tv, NULL);
|
|
return approxidate_str(date, &tv, error_ret);
|
|
}
|