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-rw-r--r--third_party/git/date.c1352
1 files changed, 0 insertions, 1352 deletions
diff --git a/third_party/git/date.c b/third_party/git/date.c
deleted file mode 100644
index 06340a77f3..0000000000
--- a/third_party/git/date.c
+++ /dev/null
@@ -1,1352 +0,0 @@
-/*
- * GIT - The information manager from hell
- *
- * Copyright (C) Linus Torvalds, 2005
- */
-
-#include "cache.h"
-
-/*
- * This is like mktime, but without normalization of tm_wday and tm_yday.
- */
-static time_t tm_to_time_t(const struct tm *tm)
-{
-	static const int mdays[] = {
-	    0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
-	};
-	int year = tm->tm_year - 70;
-	int month = tm->tm_mon;
-	int day = tm->tm_mday;
-
-	if (year < 0 || year > 129) /* algo only works for 1970-2099 */
-		return -1;
-	if (month < 0 || month > 11) /* array bounds */
-		return -1;
-	if (month < 2 || (year + 2) % 4)
-		day--;
-	if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0)
-		return -1;
-	return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL +
-		tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec;
-}
-
-static const char *month_names[] = {
-	"January", "February", "March", "April", "May", "June",
-	"July", "August", "September", "October", "November", "December"
-};
-
-static const char *weekday_names[] = {
-	"Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays"
-};
-
-static time_t gm_time_t(timestamp_t time, int tz)
-{
-	int minutes;
-
-	minutes = tz < 0 ? -tz : tz;
-	minutes = (minutes / 100)*60 + (minutes % 100);
-	minutes = tz < 0 ? -minutes : minutes;
-
-	if (minutes > 0) {
-		if (unsigned_add_overflows(time, minutes * 60))
-			die("Timestamp+tz too large: %"PRItime" +%04d",
-			    time, tz);
-	} else if (time < -minutes * 60)
-		die("Timestamp before Unix epoch: %"PRItime" %04d", time, tz);
-	time += minutes * 60;
-	if (date_overflows(time))
-		die("Timestamp too large for this system: %"PRItime, time);
-	return (time_t)time;
-}
-
-/*
- * The "tz" thing is passed in as this strange "decimal parse of tz"
- * thing, which means that tz -0100 is passed in as the integer -100,
- * even though it means "sixty minutes off"
- */
-static struct tm *time_to_tm(timestamp_t time, int tz)
-{
-	time_t t = gm_time_t(time, tz);
-	return gmtime(&t);
-}
-
-static struct tm *time_to_tm_local(timestamp_t time)
-{
-	time_t t = time;
-	return localtime(&t);
-}
-
-/*
- * Fill in the localtime 'struct tm' for the supplied time,
- * and return the local tz.
- */
-static int local_time_tzoffset(time_t t, struct tm *tm)
-{
-	time_t t_local;
-	int offset, eastwest;
-
-	localtime_r(&t, tm);
-	t_local = tm_to_time_t(tm);
-	if (t_local == -1)
-		return 0; /* error; just use +0000 */
-	if (t_local < t) {
-		eastwest = -1;
-		offset = t - t_local;
-	} else {
-		eastwest = 1;
-		offset = t_local - t;
-	}
-	offset /= 60; /* in minutes */
-	offset = (offset % 60) + ((offset / 60) * 100);
-	return offset * eastwest;
-}
-
-/*
- * What value of "tz" was in effect back then at "time" in the
- * local timezone?
- */
-static int local_tzoffset(timestamp_t time)
-{
-	struct tm tm;
-
-	if (date_overflows(time))
-		die("Timestamp too large for this system: %"PRItime, time);
-
-	return local_time_tzoffset((time_t)time, &tm);
-}
-
-static void get_time(struct timeval *now)
-{
-	const char *x;
-
-	x = getenv("GIT_TEST_DATE_NOW");
-	if (x) {
-		now->tv_sec = atoi(x);
-		now->tv_usec = 0;
-	}
-	else
-		gettimeofday(now, NULL);
-}
-
-void show_date_relative(timestamp_t time,
-			const struct timeval *now,
-			struct strbuf *timebuf)
-{
-	timestamp_t diff;
-	if (now->tv_sec < time) {
-		strbuf_addstr(timebuf, _("in the future"));
-		return;
-	}
-	diff = now->tv_sec - time;
-	if (diff < 90) {
-		strbuf_addf(timebuf,
-			 Q_("%"PRItime" second ago", "%"PRItime" seconds ago", diff), diff);
-		return;
-	}
-	/* Turn it into minutes */
-	diff = (diff + 30) / 60;
-	if (diff < 90) {
-		strbuf_addf(timebuf,
-			 Q_("%"PRItime" minute ago", "%"PRItime" minutes ago", diff), diff);
-		return;
-	}
-	/* Turn it into hours */
-	diff = (diff + 30) / 60;
-	if (diff < 36) {
-		strbuf_addf(timebuf,
-			 Q_("%"PRItime" hour ago", "%"PRItime" hours ago", diff), diff);
-		return;
-	}
-	/* We deal with number of days from here on */
-	diff = (diff + 12) / 24;
-	if (diff < 14) {
-		strbuf_addf(timebuf,
-			 Q_("%"PRItime" day ago", "%"PRItime" days ago", diff), diff);
-		return;
-	}
-	/* Say weeks for the past 10 weeks or so */
-	if (diff < 70) {
-		strbuf_addf(timebuf,
-			 Q_("%"PRItime" week ago", "%"PRItime" weeks ago", (diff + 3) / 7),
-			 (diff + 3) / 7);
-		return;
-	}
-	/* Say months for the past 12 months or so */
-	if (diff < 365) {
-		strbuf_addf(timebuf,
-			 Q_("%"PRItime" month ago", "%"PRItime" months ago", (diff + 15) / 30),
-			 (diff + 15) / 30);
-		return;
-	}
-	/* Give years and months for 5 years or so */
-	if (diff < 1825) {
-		timestamp_t totalmonths = (diff * 12 * 2 + 365) / (365 * 2);
-		timestamp_t years = totalmonths / 12;
-		timestamp_t months = totalmonths % 12;
-		if (months) {
-			struct strbuf sb = STRBUF_INIT;
-			strbuf_addf(&sb, Q_("%"PRItime" year", "%"PRItime" years", years), years);
-			strbuf_addf(timebuf,
-				 /* TRANSLATORS: "%s" is "<n> years" */
-				 Q_("%s, %"PRItime" month ago", "%s, %"PRItime" months ago", months),
-				 sb.buf, months);
-			strbuf_release(&sb);
-		} else
-			strbuf_addf(timebuf,
-				 Q_("%"PRItime" year ago", "%"PRItime" years ago", years), years);
-		return;
-	}
-	/* Otherwise, just years. Centuries is probably overkill. */
-	strbuf_addf(timebuf,
-		 Q_("%"PRItime" year ago", "%"PRItime" years ago", (diff + 183) / 365),
-		 (diff + 183) / 365);
-}
-
-struct date_mode *date_mode_from_type(enum date_mode_type type)
-{
-	static struct date_mode mode;
-	if (type == DATE_STRFTIME)
-		BUG("cannot create anonymous strftime date_mode struct");
-	mode.type = type;
-	mode.local = 0;
-	return &mode;
-}
-
-static void show_date_normal(struct strbuf *buf, timestamp_t time, struct tm *tm, int tz, struct tm *human_tm, int human_tz, int local)
-{
-	struct {
-		unsigned int	year:1,
-				date:1,
-				wday:1,
-				time:1,
-				seconds:1,
-				tz:1;
-	} hide = { 0 };
-
-	hide.tz = local || tz == human_tz;
-	hide.year = tm->tm_year == human_tm->tm_year;
-	if (hide.year) {
-		if (tm->tm_mon == human_tm->tm_mon) {
-			if (tm->tm_mday > human_tm->tm_mday) {
-				/* Future date: think timezones */
-			} else if (tm->tm_mday == human_tm->tm_mday) {
-				hide.date = hide.wday = 1;
-			} else if (tm->tm_mday + 5 > human_tm->tm_mday) {
-				/* Leave just weekday if it was a few days ago */
-				hide.date = 1;
-			}
-		}
-	}
-
-	/* Show "today" times as just relative times */
-	if (hide.wday) {
-		struct timeval now;
-		get_time(&now);
-		show_date_relative(time, &now, buf);
-		return;
-	}
-
-	/*
-	 * Always hide seconds for human-readable.
-	 * Hide timezone if showing date.
-	 * Hide weekday and time if showing year.
-	 *
-	 * The logic here is two-fold:
-	 *  (a) only show details when recent enough to matter
-	 *  (b) keep the maximum length "similar", and in check
-	 */
-	if (human_tm->tm_year) {
-		hide.seconds = 1;
-		hide.tz |= !hide.date;
-		hide.wday = hide.time = !hide.year;
-	}
-
-	if (!hide.wday)
-		strbuf_addf(buf, "%.3s ", weekday_names[tm->tm_wday]);
-	if (!hide.date)
-		strbuf_addf(buf, "%.3s %d ", month_names[tm->tm_mon], tm->tm_mday);
-
-	/* Do we want AM/PM depending on locale? */
-	if (!hide.time) {
-		strbuf_addf(buf, "%02d:%02d", tm->tm_hour, tm->tm_min);
-		if (!hide.seconds)
-			strbuf_addf(buf, ":%02d", tm->tm_sec);
-	} else
-		strbuf_rtrim(buf);
-
-	if (!hide.year)
-		strbuf_addf(buf, " %d", tm->tm_year + 1900);
-
-	if (!hide.tz)
-		strbuf_addf(buf, " %+05d", tz);
-}
-
-const char *show_date(timestamp_t time, int tz, const struct date_mode *mode)
-{
-	struct tm *tm;
-	struct tm human_tm = { 0 };
-	int human_tz = -1;
-	static struct strbuf timebuf = STRBUF_INIT;
-
-	if (mode->type == DATE_UNIX) {
-		strbuf_reset(&timebuf);
-		strbuf_addf(&timebuf, "%"PRItime, time);
-		return timebuf.buf;
-	}
-
-	if (mode->type == DATE_HUMAN) {
-		struct timeval now;
-
-		get_time(&now);
-
-		/* Fill in the data for "current time" in human_tz and human_tm */
-		human_tz = local_time_tzoffset(now.tv_sec, &human_tm);
-	}
-
-	if (mode->local)
-		tz = local_tzoffset(time);
-
-	if (mode->type == DATE_RAW) {
-		strbuf_reset(&timebuf);
-		strbuf_addf(&timebuf, "%"PRItime" %+05d", time, tz);
-		return timebuf.buf;
-	}
-
-	if (mode->type == DATE_RELATIVE) {
-		struct timeval now;
-
-		strbuf_reset(&timebuf);
-		get_time(&now);
-		show_date_relative(time, &now, &timebuf);
-		return timebuf.buf;
-	}
-
-	if (mode->local)
-		tm = time_to_tm_local(time);
-	else
-		tm = time_to_tm(time, tz);
-	if (!tm) {
-		tm = time_to_tm(0, 0);
-		tz = 0;
-	}
-
-	strbuf_reset(&timebuf);
-	if (mode->type == DATE_SHORT)
-		strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900,
-				tm->tm_mon + 1, tm->tm_mday);
-	else if (mode->type == DATE_ISO8601)
-		strbuf_addf(&timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d",
-				tm->tm_year + 1900,
-				tm->tm_mon + 1,
-				tm->tm_mday,
-				tm->tm_hour, tm->tm_min, tm->tm_sec,
-				tz);
-	else if (mode->type == DATE_ISO8601_STRICT) {
-		char sign = (tz >= 0) ? '+' : '-';
-		tz = abs(tz);
-		strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d:%02d:%02d%c%02d:%02d",
-				tm->tm_year + 1900,
-				tm->tm_mon + 1,
-				tm->tm_mday,
-				tm->tm_hour, tm->tm_min, tm->tm_sec,
-				sign, tz / 100, tz % 100);
-	} else if (mode->type == DATE_DOTTIME) {
-		char sign = (tz >= 0) ? '+' : '-';
-		tz = abs(tz);
-
-		// Time is converted again without the timezone as the
-		// dottime format includes the zone only in offset
-		// position.
-		time_t t = gm_time_t(time, 0);
-		tm = gmtime(&t);
-		strbuf_addf(&timebuf, "%04d-%02d-%02dT%02d·%02d%c%02d%02d",
-				tm->tm_year + 1900,
-				tm->tm_mon + 1,
-				tm->tm_mday,
-				tm->tm_hour, tm->tm_min,
-				sign, tz / 100, tz % 100);
-	} else if (mode->type == DATE_RFC2822)
-		strbuf_addf(&timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d",
-			weekday_names[tm->tm_wday], tm->tm_mday,
-			month_names[tm->tm_mon], tm->tm_year + 1900,
-			tm->tm_hour, tm->tm_min, tm->tm_sec, tz);
-	else if (mode->type == DATE_STRFTIME)
-		strbuf_addftime(&timebuf, mode->strftime_fmt, tm, tz,
-				!mode->local);
-	else
-		show_date_normal(&timebuf, time, tm, tz, &human_tm, human_tz, mode->local);
-	return timebuf.buf;
-}
-
-/*
- * Check these. And note how it doesn't do the summer-time conversion.
- *
- * In my world, it's always summer, and things are probably a bit off
- * in other ways too.
- */
-static const struct {
-	const char *name;
-	int offset;
-	int dst;
-} timezone_names[] = {
-	{ "IDLW", -12, 0, },	/* International Date Line West */
-	{ "NT",   -11, 0, },	/* Nome */
-	{ "CAT",  -10, 0, },	/* Central Alaska */
-	{ "HST",  -10, 0, },	/* Hawaii Standard */
-	{ "HDT",  -10, 1, },	/* Hawaii Daylight */
-	{ "YST",   -9, 0, },	/* Yukon Standard */
-	{ "YDT",   -9, 1, },	/* Yukon Daylight */
-	{ "PST",   -8, 0, },	/* Pacific Standard */
-	{ "PDT",   -8, 1, },	/* Pacific Daylight */
-	{ "MST",   -7, 0, },	/* Mountain Standard */
-	{ "MDT",   -7, 1, },	/* Mountain Daylight */
-	{ "CST",   -6, 0, },	/* Central Standard */
-	{ "CDT",   -6, 1, },	/* Central Daylight */
-	{ "EST",   -5, 0, },	/* Eastern Standard */
-	{ "EDT",   -5, 1, },	/* Eastern Daylight */
-	{ "AST",   -3, 0, },	/* Atlantic Standard */
-	{ "ADT",   -3, 1, },	/* Atlantic Daylight */
-	{ "WAT",   -1, 0, },	/* West Africa */
-
-	{ "GMT",    0, 0, },	/* Greenwich Mean */
-	{ "UTC",    0, 0, },	/* Universal (Coordinated) */
-	{ "Z",      0, 0, },    /* Zulu, alias for UTC */
-
-	{ "WET",    0, 0, },	/* Western European */
-	{ "BST",    0, 1, },	/* British Summer */
-	{ "CET",   +1, 0, },	/* Central European */
-	{ "MET",   +1, 0, },	/* Middle European */
-	{ "MEWT",  +1, 0, },	/* Middle European Winter */
-	{ "MEST",  +1, 1, },	/* Middle European Summer */
-	{ "CEST",  +1, 1, },	/* Central European Summer */
-	{ "MESZ",  +1, 1, },	/* Middle European Summer */
-	{ "FWT",   +1, 0, },	/* French Winter */
-	{ "FST",   +1, 1, },	/* French Summer */
-	{ "EET",   +2, 0, },	/* Eastern Europe, USSR Zone 1 */
-	{ "EEST",  +2, 1, },	/* Eastern European Daylight */
-	{ "WAST",  +7, 0, },	/* West Australian Standard */
-	{ "WADT",  +7, 1, },	/* West Australian Daylight */
-	{ "CCT",   +8, 0, },	/* China Coast, USSR Zone 7 */
-	{ "JST",   +9, 0, },	/* Japan Standard, USSR Zone 8 */
-	{ "EAST", +10, 0, },	/* Eastern Australian Standard */
-	{ "EADT", +10, 1, },	/* Eastern Australian Daylight */
-	{ "GST",  +10, 0, },	/* Guam Standard, USSR Zone 9 */
-	{ "NZT",  +12, 0, },	/* New Zealand */
-	{ "NZST", +12, 0, },	/* New Zealand Standard */
-	{ "NZDT", +12, 1, },	/* New Zealand Daylight */
-	{ "IDLE", +12, 0, },	/* International Date Line East */
-};
-
-static int match_string(const char *date, const char *str)
-{
-	int i = 0;
-
-	for (i = 0; *date; date++, str++, i++) {
-		if (*date == *str)
-			continue;
-		if (toupper(*date) == toupper(*str))
-			continue;
-		if (!isalnum(*date))
-			break;
-		return 0;
-	}
-	return i;
-}
-
-static int skip_alpha(const char *date)
-{
-	int i = 0;
-	do {
-		i++;
-	} while (isalpha(date[i]));
-	return i;
-}
-
-/*
-* Parse month, weekday, or timezone name
-*/
-static int match_alpha(const char *date, struct tm *tm, int *offset)
-{
-	int i;
-
-	for (i = 0; i < 12; i++) {
-		int match = match_string(date, month_names[i]);
-		if (match >= 3) {
-			tm->tm_mon = i;
-			return match;
-		}
-	}
-
-	for (i = 0; i < 7; i++) {
-		int match = match_string(date, weekday_names[i]);
-		if (match >= 3) {
-			tm->tm_wday = i;
-			return match;
-		}
-	}
-
-	for (i = 0; i < ARRAY_SIZE(timezone_names); i++) {
-		int match = match_string(date, timezone_names[i].name);
-		if (match >= 3 || match == strlen(timezone_names[i].name)) {
-			int off = timezone_names[i].offset;
-
-			/* This is bogus, but we like summer */
-			off += timezone_names[i].dst;
-
-			/* Only use the tz name offset if we don't have anything better */
-			if (*offset == -1)
-				*offset = 60*off;
-
-			return match;
-		}
-	}
-
-	if (match_string(date, "PM") == 2) {
-		tm->tm_hour = (tm->tm_hour % 12) + 12;
-		return 2;
-	}
-
-	if (match_string(date, "AM") == 2) {
-		tm->tm_hour = (tm->tm_hour % 12) + 0;
-		return 2;
-	}
-
-	/* BAD CRAP */
-	return skip_alpha(date);
-}
-
-static int is_date(int year, int month, int day, struct tm *now_tm, time_t now, struct tm *tm)
-{
-	if (month > 0 && month < 13 && day > 0 && day < 32) {
-		struct tm check = *tm;
-		struct tm *r = (now_tm ? &check : tm);
-		time_t specified;
-
-		r->tm_mon = month - 1;
-		r->tm_mday = day;
-		if (year == -1) {
-			if (!now_tm)
-				return 1;
-			r->tm_year = now_tm->tm_year;
-		}
-		else if (year >= 1970 && year < 2100)
-			r->tm_year = year - 1900;
-		else if (year > 70 && year < 100)
-			r->tm_year = year;
-		else if (year < 38)
-			r->tm_year = year + 100;
-		else
-			return 0;
-		if (!now_tm)
-			return 1;
-
-		specified = tm_to_time_t(r);
-
-		/* Be it commit time or author time, it does not make
-		 * sense to specify timestamp way into the future.  Make
-		 * sure it is not later than ten days from now...
-		 */
-		if ((specified != -1) && (now + 10*24*3600 < specified))
-			return 0;
-		tm->tm_mon = r->tm_mon;
-		tm->tm_mday = r->tm_mday;
-		if (year != -1)
-			tm->tm_year = r->tm_year;
-		return 1;
-	}
-	return 0;
-}
-
-static int match_multi_number(timestamp_t num, char c, const char *date,
-			      char *end, struct tm *tm, time_t now)
-{
-	struct tm now_tm;
-	struct tm *refuse_future;
-	long num2, num3;
-
-	num2 = strtol(end+1, &end, 10);
-	num3 = -1;
-	if (*end == c && isdigit(end[1]))
-		num3 = strtol(end+1, &end, 10);
-
-	/* Time? Date? */
-	switch (c) {
-	case ':':
-		if (num3 < 0)
-			num3 = 0;
-		if (num < 25 && num2 >= 0 && num2 < 60 && num3 >= 0 && num3 <= 60) {
-			tm->tm_hour = num;
-			tm->tm_min = num2;
-			tm->tm_sec = num3;
-			break;
-		}
-		return 0;
-
-	case '-':
-	case '/':
-	case '.':
-		if (!now)
-			now = time(NULL);
-		refuse_future = NULL;
-		if (gmtime_r(&now, &now_tm))
-			refuse_future = &now_tm;
-
-		if (num > 70) {
-			/* yyyy-mm-dd? */
-			if (is_date(num, num2, num3, NULL, now, tm))
-				break;
-			/* yyyy-dd-mm? */
-			if (is_date(num, num3, num2, NULL, now, tm))
-				break;
-		}
-		/* Our eastern European friends say dd.mm.yy[yy]
-		 * is the norm there, so giving precedence to
-		 * mm/dd/yy[yy] form only when separator is not '.'
-		 */
-		if (c != '.' &&
-		    is_date(num3, num, num2, refuse_future, now, tm))
-			break;
-		/* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */
-		if (is_date(num3, num2, num, refuse_future, now, tm))
-			break;
-		/* Funny European mm.dd.yy */
-		if (c == '.' &&
-		    is_date(num3, num, num2, refuse_future, now, tm))
-			break;
-		return 0;
-	}
-	return end - date;
-}
-
-/*
- * Have we filled in any part of the time/date yet?
- * We just do a binary 'and' to see if the sign bit
- * is set in all the values.
- */
-static inline int nodate(struct tm *tm)
-{
-	return (tm->tm_year &
-		tm->tm_mon &
-		tm->tm_mday &
-		tm->tm_hour &
-		tm->tm_min &
-		tm->tm_sec) < 0;
-}
-
-/*
- * We've seen a digit. Time? Year? Date?
- */
-static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt)
-{
-	int n;
-	char *end;
-	timestamp_t num;
-
-	num = parse_timestamp(date, &end, 10);
-
-	/*
-	 * Seconds since 1970? We trigger on that for any numbers with
-	 * more than 8 digits. This is because we don't want to rule out
-	 * numbers like 20070606 as a YYYYMMDD date.
-	 */
-	if (num >= 100000000 && nodate(tm)) {
-		time_t time = num;
-		if (gmtime_r(&time, tm)) {
-			*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, 0);
-			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 void date_string(timestamp_t date, int offset, struct strbuf *buf)
-{
-	int sign = '+';
-
-	if (offset < 0) {
-		offset = -offset;
-		sign = '-';
-	}
-	strbuf_addf(buf, "%"PRItime" %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, timestamp_t *timestamp, int *offset)
-{
-	char *end;
-	timestamp_t stamp;
-	int ofs;
-
-	if (*date < '0' || '9' < *date)
-		return -1;
-	stamp = parse_timestamp(date, &end, 10);
-	if (*end != ' ' || stamp == TIME_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, timestamp_t *timestamp, int *offset)
-{
-	struct tm tm;
-	int tm_gmt;
-	timestamp_t 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;
-	}
-
-	/* do not use mktime(), which uses local timezone, here */
-	*timestamp = tm_to_time_t(&tm);
-	if (*timestamp == -1)
-		return -1;
-
-	if (*offset == -1) {
-		time_t temp_time;
-
-		/* gmtime_r() in match_digit() may have clobbered it */
-		tm.tm_isdst = -1;
-		temp_time = mktime(&tm);
-		if ((time_t)*timestamp > temp_time) {
-			*offset = ((time_t)*timestamp - temp_time) / 60;
-		} else {
-			*offset = -(int)((temp_time - (time_t)*timestamp) / 60);
-		}
-	}
-
-	if (!tm_gmt)
-		*timestamp -= *offset * 60;
-	return 0; /* success */
-}
-
-int parse_expiry_date(const char *date, timestamp_t *timestamp)
-{
-	int errors = 0;
-
-	if (!strcmp(date, "never") || !strcmp(date, "false"))
-		*timestamp = 0;
-	else if (!strcmp(date, "all") || !strcmp(date, "now"))
-		/*
-		 * We take over "now" here, which usually translates
-		 * to the current timestamp.  This is because the user
-		 * really means to expire everything she has done in
-		 * the past, and by definition reflogs are the record
-		 * of the past, and there is nothing from the future
-		 * to be kept.
-		 */
-		*timestamp = TIME_MAX;
-	else
-		*timestamp = approxidate_careful(date, &errors);
-
-	return errors;
-}
-
-int parse_date(const char *date, struct strbuf *result)
-{
-	timestamp_t timestamp;
-	int offset;
-	if (parse_date_basic(date, &timestamp, &offset))
-		return -1;
-	date_string(timestamp, offset, result);
-	return 0;
-}
-
-static enum date_mode_type parse_date_type(const char *format, const char **end)
-{
-	if (skip_prefix(format, "relative", end))
-		return DATE_RELATIVE;
-	if (skip_prefix(format, "iso8601-strict", end) ||
-	    skip_prefix(format, "iso-strict", end))
-		return DATE_ISO8601_STRICT;
-	if (skip_prefix(format, "iso8601", end) ||
-	    skip_prefix(format, "iso", end))
-		return DATE_ISO8601;
-	if (skip_prefix(format, "rfc2822", end) ||
-	    skip_prefix(format, "rfc", end))
-		return DATE_RFC2822;
-	if (skip_prefix(format, "short", end))
-		return DATE_SHORT;
-	if (skip_prefix(format, "default", end))
-		return DATE_NORMAL;
-	if (skip_prefix(format, "human", end))
-		return DATE_HUMAN;
-	if (skip_prefix(format, "raw", end))
-		return DATE_RAW;
-	if (skip_prefix(format, "unix", end))
-		return DATE_UNIX;
-	if (skip_prefix(format, "format", end))
-		return DATE_STRFTIME;
-	if (skip_prefix(format, "dottime", end))
-		return DATE_DOTTIME;
-	/*
-	 * Please update $__git_log_date_formats in
-	 * git-completion.bash when you add new formats.
-	 */
-
-	die("unknown date format %s", format);
-}
-
-void parse_date_format(const char *format, struct date_mode *mode)
-{
-	const char *p;
-
-	/* "auto:foo" is "if tty/pager, then foo, otherwise normal" */
-	if (skip_prefix(format, "auto:", &p)) {
-		if (isatty(1) || pager_in_use())
-			format = p;
-		else
-			format = "default";
-	}
-
-	/* historical alias */
-	if (!strcmp(format, "local"))
-		format = "default-local";
-
-	mode->type = parse_date_type(format, &p);
-	mode->local = 0;
-
-	if (skip_prefix(p, "-local", &p))
-		mode->local = 1;
-
-	if (mode->type == DATE_STRFTIME) {
-		if (!skip_prefix(p, ":", &p))
-			die("date format missing colon separator: %s", format);
-		mode->strftime_fmt = xstrdup(p);
-	} else if (*p)
-		die("unknown date format %s", format);
-}
-
-void datestamp(struct strbuf *out)
-{
-	time_t now;
-	int offset;
-
-	time(&now);
-
-	offset = tm_to_time_t(localtime(&now)) - now;
-	offset /= 60;
-
-	date_string(now, offset, out);
-}
-
-/*
- * Relative time update (eg "2 days ago").  If we haven't set the time
- * yet, we need to set it from current time.
- */
-static time_t update_tm(struct tm *tm, struct tm *now, time_t 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;
-}
-
-/*
- * 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 void date_now(struct tm *tm, struct tm *now, int *num)
-{
-	*num = 0;
-	update_tm(tm, now, 0);
-}
-
-static void date_yesterday(struct tm *tm, struct tm *now, int *num)
-{
-	*num = 0;
-	update_tm(tm, now, 24*60*60);
-}
-
-static void date_time(struct tm *tm, struct tm *now, int hour)
-{
-	if (tm->tm_hour < hour)
-		update_tm(tm, now, 24*60*60);
-	tm->tm_hour = hour;
-	tm->tm_min = 0;
-	tm->tm_sec = 0;
-}
-
-static void date_midnight(struct tm *tm, struct tm *now, int *num)
-{
-	pending_number(tm, num);
-	date_time(tm, now, 0);
-}
-
-static void date_noon(struct tm *tm, struct tm *now, int *num)
-{
-	pending_number(tm, num);
-	date_time(tm, now, 12);
-}
-
-static void date_tea(struct tm *tm, struct tm *now, int *num)
-{
-	pending_number(tm, 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);
-	*num = 0;
-}
-
-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,
-				     time_t now)
-{
-	char *end;
-	timestamp_t number = parse_timestamp(date, &end, 10);
-
-	switch (*end) {
-	case ':':
-	case '.':
-	case '/':
-	case '-':
-		if (isdigit(end[1])) {
-			int match = match_multi_number(number, *end, date, end,
-						       tm, now);
-			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;
-}
-
-static timestamp_t 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, time_sec);
-			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 (timestamp_t)update_tm(&tm, &now, 0);
-}
-
-timestamp_t approxidate_relative(const char *date, const struct timeval *tv)
-{
-	timestamp_t timestamp;
-	int offset;
-	int errors = 0;
-
-	if (!parse_date_basic(date, &timestamp, &offset))
-		return timestamp;
-	return approxidate_str(date, tv, &errors);
-}
-
-timestamp_t approxidate_careful(const char *date, int *error_ret)
-{
-	struct timeval tv;
-	timestamp_t timestamp;
-	int offset;
-	int dummy = 0;
-	if (!error_ret)
-		error_ret = &dummy;
-
-	if (!parse_date_basic(date, &timestamp, &offset)) {
-		*error_ret = 0;
-		return timestamp;
-	}
-
-	get_time(&tv);
-	return approxidate_str(date, &tv, error_ret);
-}
-
-int date_overflows(timestamp_t t)
-{
-	time_t sys;
-
-	/* If we overflowed our timestamp data type, that's bad... */
-	if ((uintmax_t)t >= TIME_MAX)
-		return 1;
-
-	/*
-	 * ...but we also are going to feed the result to system
-	 * functions that expect time_t, which is often "signed long".
-	 * Make sure that we fit into time_t, as well.
-	 */
-	sys = t;
-	return t != sys || (t < 1) != (sys < 1);
-}