a7b02ccf9a
This adds --date={local,relative,default} option to log family of commands,
to allow displaying timestamps in user's local timezone, relative time, or
the default format.
Existing --relative-date option is a synonym of --date=relative; we could
probably deprecate it in the long run.
Signed-off-by: Junio C Hamano <junkio@cox.net>
832 lines
18 KiB
C
832 lines
18 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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static time_t my_mktime(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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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 = my_mktime(&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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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 char timebuf[200];
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if (mode == DATE_RELATIVE) {
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unsigned long diff;
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struct timeval now;
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gettimeofday(&now, NULL);
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if (now.tv_sec < time)
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return "in the future";
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diff = now.tv_sec - time;
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if (diff < 90) {
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snprintf(timebuf, sizeof(timebuf), "%lu seconds ago", diff);
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return timebuf;
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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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snprintf(timebuf, sizeof(timebuf), "%lu minutes ago", diff);
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return timebuf;
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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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snprintf(timebuf, sizeof(timebuf), "%lu hours ago", diff);
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return timebuf;
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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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snprintf(timebuf, sizeof(timebuf), "%lu days ago", diff);
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return timebuf;
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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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snprintf(timebuf, sizeof(timebuf), "%lu weeks ago", (diff + 3) / 7);
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return timebuf;
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}
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/* Say months for the past 12 months or so */
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if (diff < 360) {
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snprintf(timebuf, sizeof(timebuf), "%lu months ago", (diff + 15) / 30);
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return timebuf;
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}
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/* Else fall back on absolute format.. */
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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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if (mode == DATE_SHORT)
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sprintf(timebuf, "%04d-%02d-%02d", tm->tm_year + 1900,
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tm->tm_mon + 1, tm->tm_mday);
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else
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sprintf(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;
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}
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const char *show_rfc2822_date(unsigned long time, int tz)
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{
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struct tm *tm;
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static char timebuf[200];
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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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sprintf(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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return timebuf;
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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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{ "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", +11, 0, }, /* New Zealand */
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{ "NZST", +11, 0, }, /* New Zealand Standard */
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{ "NZDT", +11, 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) {
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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 = my_mktime(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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* 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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* Seconds since 1970? We trigger on that for anything after Jan 1, 2000
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*/
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if (num > 946684800) {
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time_t time = num;
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if (gmtime_r(&time, tm)) {
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*tm_gmt = 1;
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return end - date;
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}
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}
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/*
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* Check for special formats: num[-.:/]num[same]num
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*/
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switch (*end) {
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case ':':
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case '.':
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case '/':
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case '-':
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if (isdigit(end[1])) {
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int match = match_multi_number(num, *end, date, end, tm);
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if (match)
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return match;
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}
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}
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/*
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* None of the special formats? Try to guess what
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* the number meant. We use the number of digits
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* to make a more educated guess..
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*/
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n = 0;
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do {
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n++;
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} while (isdigit(date[n]));
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/* Four-digit year or a timezone? */
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if (n == 4) {
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if (num <= 1400 && *offset == -1) {
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unsigned int minutes = num % 100;
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unsigned int hours = num / 100;
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*offset = hours*60 + minutes;
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} else if (num > 1900 && num < 2100)
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tm->tm_year = num - 1900;
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return n;
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}
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/*
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* NOTE! We will give precedence to day-of-month over month or
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* year numbers in the 1-12 range. So 05 is always "mday 5",
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* unless we already have a mday..
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*
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* IOW, 01 Apr 05 parses as "April 1st, 2005".
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*/
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if (num > 0 && num < 32 && tm->tm_mday < 0) {
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tm->tm_mday = num;
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return n;
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}
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/* Two-digit year? */
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if (n == 2 && tm->tm_year < 0) {
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if (num < 10 && tm->tm_mday >= 0) {
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tm->tm_year = num + 100;
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return n;
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}
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if (num >= 70) {
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tm->tm_year = num;
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return n;
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}
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}
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if (num > 0 && num < 32) {
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tm->tm_mday = num;
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} else if (num > 1900) {
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tm->tm_year = num - 1900;
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} else if (num > 70) {
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tm->tm_year = num;
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} else if (num > 0 && num < 13) {
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tm->tm_mon = num-1;
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}
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return n;
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}
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static int match_tz(const char *date, int *offp)
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{
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char *end;
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int offset = strtoul(date+1, &end, 10);
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int min, hour;
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int n = end - date - 1;
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min = offset % 100;
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hour = offset / 100;
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/*
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* Don't accept any random crap.. At least 3 digits, and
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* a valid minute. We might want to check that the minutes
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* are divisible by 30 or something too.
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|
*/
|
|
if (min < 60 && n > 2) {
|
|
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);
|
|
}
|
|
|
|
/* 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(const char *date, char *result, int maxlen)
|
|
{
|
|
struct tm tm;
|
|
int offset, tm_gmt;
|
|
time_t then;
|
|
|
|
memset(&tm, 0, sizeof(tm));
|
|
tm.tm_year = -1;
|
|
tm.tm_mon = -1;
|
|
tm.tm_mday = -1;
|
|
tm.tm_isdst = -1;
|
|
offset = -1;
|
|
tm_gmt = 0;
|
|
|
|
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 */
|
|
then = my_mktime(&tm);
|
|
if (offset == -1)
|
|
offset = (then - mktime(&tm)) / 60;
|
|
|
|
if (then == -1)
|
|
return -1;
|
|
|
|
if (!tm_gmt)
|
|
then -= offset * 60;
|
|
return date_string(then, offset, result, maxlen);
|
|
}
|
|
|
|
void datestamp(char *buf, int bufsize)
|
|
{
|
|
time_t now;
|
|
int offset;
|
|
|
|
time(&now);
|
|
|
|
offset = my_mktime(localtime(&now)) - now;
|
|
offset /= 60;
|
|
|
|
date_string(now, offset, buf, bufsize);
|
|
}
|
|
|
|
static void update_tm(struct tm *tm, unsigned long sec)
|
|
{
|
|
time_t n = mktime(tm) - sec;
|
|
localtime_r(&n, tm);
|
|
}
|
|
|
|
static void date_yesterday(struct tm *tm, int *num)
|
|
{
|
|
update_tm(tm, 24*60*60);
|
|
}
|
|
|
|
static void date_time(struct tm *tm, int hour)
|
|
{
|
|
if (tm->tm_hour < hour)
|
|
date_yesterday(tm, NULL);
|
|
tm->tm_hour = hour;
|
|
tm->tm_min = 0;
|
|
tm->tm_sec = 0;
|
|
}
|
|
|
|
static void date_midnight(struct tm *tm, int *num)
|
|
{
|
|
date_time(tm, 0);
|
|
}
|
|
|
|
static void date_noon(struct tm *tm, int *num)
|
|
{
|
|
date_time(tm, 12);
|
|
}
|
|
|
|
static void date_tea(struct tm *tm, int *num)
|
|
{
|
|
date_time(tm, 17);
|
|
}
|
|
|
|
static void date_pm(struct tm *tm, 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, 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 const struct special {
|
|
const char *name;
|
|
void (*fn)(struct tm *, int *);
|
|
} special[] = {
|
|
{ "yesterday", date_yesterday },
|
|
{ "noon", date_noon },
|
|
{ "midnight", date_midnight },
|
|
{ "tea", date_tea },
|
|
{ "PM", date_pm },
|
|
{ "AM", date_am },
|
|
{ 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, int *num)
|
|
{
|
|
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;
|
|
return end;
|
|
}
|
|
}
|
|
|
|
for (s = special; s->name; s++) {
|
|
int len = strlen(s->name);
|
|
if (match_string(date, s->name) == len) {
|
|
s->fn(tm, num);
|
|
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;
|
|
return end;
|
|
}
|
|
}
|
|
if (match_string(date, "last") == 4)
|
|
*num = 1;
|
|
return end;
|
|
}
|
|
|
|
tl = typelen;
|
|
while (tl->type) {
|
|
int len = strlen(tl->type);
|
|
if (match_string(date, tl->type) >= len-1) {
|
|
update_tm(tm, tl->length * *num);
|
|
*num = 0;
|
|
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, diff * 24 * 60 * 60);
|
|
return end;
|
|
}
|
|
}
|
|
|
|
if (match_string(date, "months") >= 5) {
|
|
int n = tm->tm_mon - *num;
|
|
*num = 0;
|
|
while (n < 0) {
|
|
n += 12;
|
|
tm->tm_year--;
|
|
}
|
|
tm->tm_mon = n;
|
|
return end;
|
|
}
|
|
|
|
if (match_string(date, "years") >= 4) {
|
|
tm->tm_year -= *num;
|
|
*num = 0;
|
|
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;
|
|
}
|
|
}
|
|
|
|
*num = number;
|
|
return end;
|
|
}
|
|
|
|
unsigned long approxidate(const char *date)
|
|
{
|
|
int number = 0;
|
|
struct tm tm, now;
|
|
struct timeval tv;
|
|
char buffer[50];
|
|
|
|
if (parse_date(date, buffer, sizeof(buffer)) > 0)
|
|
return strtoul(buffer, NULL, 10);
|
|
|
|
gettimeofday(&tv, NULL);
|
|
localtime_r(&tv.tv_sec, &tm);
|
|
now = tm;
|
|
for (;;) {
|
|
unsigned char c = *date;
|
|
if (!c)
|
|
break;
|
|
date++;
|
|
if (isdigit(c)) {
|
|
date = approxidate_digit(date-1, &tm, &number);
|
|
continue;
|
|
}
|
|
if (isalpha(c))
|
|
date = approxidate_alpha(date-1, &tm, &number);
|
|
}
|
|
if (number > 0 && number < 32)
|
|
tm.tm_mday = number;
|
|
if (tm.tm_mon > now.tm_mon && tm.tm_year == now.tm_year)
|
|
tm.tm_year--;
|
|
return mktime(&tm);
|
|
}
|