diff options
Diffstat (limited to 'third_party/git/date.c')
| -rw-r--r-- | third_party/git/date.c | 1390 |
1 files changed, 0 insertions, 1390 deletions
diff --git a/third_party/git/date.c b/third_party/git/date.c deleted file mode 100644 index 40726b7e7508..000000000000 --- a/third_party/git/date.c +++ /dev/null @@ -1,1390 +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, struct tm *tm) -{ - time_t t = gm_time_t(time, tz); - return gmtime_r(&t, tm); -} - -static struct tm *time_to_tm_local(timestamp_t time, struct tm *tm) -{ - time_t t = time; - return localtime_r(&t, tm); -} - -/* - * 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, struct strbuf *timebuf) -{ - struct timeval now; - timestamp_t diff; - - get_time(&now); - 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) { - show_date_relative(time, 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 tmbuf = { 0 }; - 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) { - strbuf_reset(&timebuf); - show_date_relative(time, &timebuf); - return timebuf.buf; - } - - if (mode->local) - tm = time_to_tm_local(time, &tmbuf); - else - tm = time_to_tm(time, tz, &tmbuf); - if (!tm) { - tm = time_to_tm(0, 0, &tmbuf); - 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 set_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 -1; - if (!now_tm) - return 0; - - 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 -1; - tm->tm_mon = r->tm_mon; - tm->tm_mday = r->tm_mday; - if (year != -1) - tm->tm_year = r->tm_year; - return 0; - } - return -1; -} - -static int set_time(long hour, long minute, long second, struct tm *tm) -{ - /* We accept 61st second because of leap second */ - if (0 <= hour && hour <= 24 && - 0 <= minute && minute < 60 && - 0 <= second && second <= 60) { - tm->tm_hour = hour; - tm->tm_min = minute; - tm->tm_sec = second; - return 0; - } - return -1; -} - -static int is_date_known(struct tm *tm) -{ - return tm->tm_year != -1 && tm->tm_mon != -1 && tm->tm_mday != -1; -} - -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 (set_time(num, num2, num3, tm) == 0) { - /* - * If %H:%M:%S was just parsed followed by: .<num4> - * Consider (& discard) it as fractional second - * if %Y%m%d is parsed before. - */ - if (*end == '.' && isdigit(end[1]) && is_date_known(tm)) - strtol(end + 1, &end, 10); - 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 (set_date(num, num2, num3, NULL, now, tm) == 0) - break; - /* yyyy-dd-mm? */ - if (set_date(num, num3, num2, NULL, now, tm) == 0) - 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 != '.' && - set_date(num3, num, num2, refuse_future, now, tm) == 0) - break; - /* European dd.mm.yy[yy] or funny US dd/mm/yy[yy] */ - if (set_date(num3, num2, num, refuse_future, now, tm) == 0) - break; - /* Funny European mm.dd.yy */ - if (c == '.' && - set_date(num3, num, num2, refuse_future, now, tm) == 0) - 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])); - - /* 8 digits, compact style of ISO-8601's date: YYYYmmDD */ - /* 6 digits, compact style of ISO-8601's time: HHMMSS */ - if (n == 8 || n == 6) { - unsigned int num1 = num / 10000; - unsigned int num2 = (num % 10000) / 100; - unsigned int num3 = num % 100; - if (n == 8) - set_date(num1, num2, num3, NULL, time(NULL), tm); - else if (n == 6 && set_time(num1, num2, num3, tm) == 0 && - *end == '.' && isdigit(end[1])) - strtoul(end + 1, &end, 10); - return end - date; - } - - /* 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, ×tamp, &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; - struct tm tm = { 0 }; - - time(&now); - - offset = tm_to_time_t(localtime_r(&now, &tm)) - 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) -{ - struct timeval tv; - timestamp_t timestamp; - int offset; - int errors = 0; - - if (!parse_date_basic(date, ×tamp, &offset)) - return timestamp; - - get_time(&tv); - return approxidate_str(date, (const struct timeval *) &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, ×tamp, &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); -} |