diff options
Diffstat (limited to 'date.c')
| -rw-r--r-- | date.c | 223 |
1 files changed, 150 insertions, 73 deletions
@@ -86,82 +86,98 @@ static int local_tzoffset(unsigned long time) return offset * eastwest; } -const char *show_date_relative(unsigned long time, int tz, +void show_date_relative(unsigned long time, int tz, const struct timeval *now, - char *timebuf, - size_t timebuf_size) + struct strbuf *timebuf) { unsigned long diff; - if (now->tv_sec < time) - return "in the future"; + if (now->tv_sec < time) { + strbuf_addstr(timebuf, _("in the future")); + return; + } diff = now->tv_sec - time; if (diff < 90) { - snprintf(timebuf, timebuf_size, "%lu seconds ago", diff); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu second ago", "%lu seconds ago", diff), diff); + return; } /* Turn it into minutes */ diff = (diff + 30) / 60; if (diff < 90) { - snprintf(timebuf, timebuf_size, "%lu minutes ago", diff); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu minute ago", "%lu minutes ago", diff), diff); + return; } /* Turn it into hours */ diff = (diff + 30) / 60; if (diff < 36) { - snprintf(timebuf, timebuf_size, "%lu hours ago", diff); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu hour ago", "%lu hours ago", diff), diff); + return; } /* We deal with number of days from here on */ diff = (diff + 12) / 24; if (diff < 14) { - snprintf(timebuf, timebuf_size, "%lu days ago", diff); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu day ago", "%lu days ago", diff), diff); + return; } /* Say weeks for the past 10 weeks or so */ if (diff < 70) { - snprintf(timebuf, timebuf_size, "%lu weeks ago", (diff + 3) / 7); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu week ago", "%lu weeks ago", (diff + 3) / 7), + (diff + 3) / 7); + return; } /* Say months for the past 12 months or so */ if (diff < 365) { - snprintf(timebuf, timebuf_size, "%lu months ago", (diff + 15) / 30); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu month ago", "%lu months ago", (diff + 15) / 30), + (diff + 15) / 30); + return; } /* Give years and months for 5 years or so */ if (diff < 1825) { - unsigned long years = diff / 365; - unsigned long months = (diff % 365 + 15) / 30; - int n; - n = snprintf(timebuf, timebuf_size, "%lu year%s", - years, (years > 1 ? "s" : "")); - if (months) - snprintf(timebuf + n, timebuf_size - n, - ", %lu month%s ago", - months, (months > 1 ? "s" : "")); - else - snprintf(timebuf + n, timebuf_size - n, " ago"); - return timebuf; + unsigned long totalmonths = (diff * 12 * 2 + 365) / (365 * 2); + unsigned long years = totalmonths / 12; + unsigned long months = totalmonths % 12; + if (months) { + struct strbuf sb = STRBUF_INIT; + strbuf_addf(&sb, Q_("%lu year", "%lu years", years), years); + /* TRANSLATORS: "%s" is "<n> years" */ + strbuf_addf(timebuf, + Q_("%s, %lu month ago", "%s, %lu months ago", months), + sb.buf, months); + strbuf_release(&sb); + } else + strbuf_addf(timebuf, + Q_("%lu year ago", "%lu years ago", years), years); + return; } /* Otherwise, just years. Centuries is probably overkill. */ - snprintf(timebuf, timebuf_size, "%lu years ago", (diff + 183) / 365); - return timebuf; + strbuf_addf(timebuf, + Q_("%lu year ago", "%lu years ago", (diff + 183) / 365), + (diff + 183) / 365); } const char *show_date(unsigned long time, int tz, enum date_mode mode) { struct tm *tm; - static char timebuf[200]; + static struct strbuf timebuf = STRBUF_INIT; if (mode == DATE_RAW) { - snprintf(timebuf, sizeof(timebuf), "%lu %+05d", time, tz); - return timebuf; + strbuf_reset(&timebuf); + strbuf_addf(&timebuf, "%lu %+05d", time, tz); + return timebuf.buf; } if (mode == DATE_RELATIVE) { struct timeval now; + + strbuf_reset(&timebuf); gettimeofday(&now, NULL); - return show_date_relative(time, tz, &now, - timebuf, sizeof(timebuf)); + show_date_relative(time, tz, &now, &timebuf); + return timebuf.buf; } if (mode == DATE_LOCAL) @@ -170,23 +186,25 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode) tm = time_to_tm(time, tz); if (!tm) return NULL; + + strbuf_reset(&timebuf); if (mode == DATE_SHORT) - sprintf(timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, + strbuf_addf(&timebuf, "%04d-%02d-%02d", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday); else if (mode == DATE_ISO8601) - sprintf(timebuf, "%04d-%02d-%02d %02d:%02d:%02d %+05d", + 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 == DATE_RFC2822) - sprintf(timebuf, "%.3s, %d %.3s %d %02d:%02d:%02d %+05d", + 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 - sprintf(timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d", + strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d", weekday_names[tm->tm_wday], month_names[tm->tm_mon], tm->tm_mday, @@ -194,7 +212,7 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode) tm->tm_year + 1900, (mode == DATE_LOCAL) ? 0 : ' ', tz); - return timebuf; + return timebuf.buf; } /* @@ -229,6 +247,7 @@ static const struct { { "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 */ @@ -305,7 +324,7 @@ static int match_alpha(const char *date, struct tm *tm, int *offset) for (i = 0; i < ARRAY_SIZE(timezone_names); i++) { int match = match_string(date, timezone_names[i].name); - if (match >= 3) { + if (match >= 3 || match == strlen(timezone_names[i].name)) { int off = timezone_names[i].offset; /* This is bogus, but we like summer */ @@ -550,23 +569,35 @@ static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt static int match_tz(const char *date, int *offp) { char *end; - int offset = strtoul(date+1, &end, 10); - int min, hour; - int n = end - date - 1; + int hour = strtoul(date + 1, &end, 10); + int n = end - (date + 1); + int min = 0; - min = offset % 100; - hour = offset / 100; + 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.. At least 3 digits, and - * a valid minute. We might want to check that the minutes - * are divisible by 30 or something too. + * 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 && n > 2) { - offset = hour*60+min; + if (min < 60 && hour < 24) { + int offset = hour * 60 + min; if (*date == '-') offset = -offset; - *offp = offset; } return end - date; @@ -583,13 +614,46 @@ static int date_string(unsigned long date, int offset, char *buf, int len) return snprintf(buf, len, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60); } +/* + * Parse a string like "0 +0000" as ancient timestamp near epoch, but + * only when it appears not as part of any other string. + */ +static int match_object_header_date(const char *date, unsigned long *timestamp, int *offset) +{ + char *end; + unsigned long stamp; + int ofs; + + if (*date < '0' || '9' <= *date) + return -1; + stamp = strtoul(date, &end, 10); + if (*end != ' ' || stamp == ULONG_MAX || (end[1] != '+' && end[1] != '-')) + return -1; + date = end + 2; + ofs = strtol(date, &end, 10); + if ((*end != '\0' && (*end != '\n')) || end != date + 4) + return -1; + ofs = (ofs / 100) * 60 + (ofs % 100); + if (date[-1] == '-') + ofs = -ofs; + *timestamp = stamp; + *offset = ofs; + return 0; +} + /* Gr. strptime is crap for this; it doesn't have a way to require RFC2822 (i.e. English) day/month names, and it doesn't work correctly with %z. */ -int parse_date(const char *date, char *result, int maxlen) +int parse_date_basic(const char *date, unsigned long *timestamp, int *offset) { struct tm tm; - int offset, tm_gmt; - time_t then; + int tm_gmt; + unsigned long dummy_timestamp; + int dummy_offset; + + if (!timestamp) + timestamp = &dummy_timestamp; + if (!offset) + offset = &dummy_offset; memset(&tm, 0, sizeof(tm)); tm.tm_year = -1; @@ -599,9 +663,12 @@ int parse_date(const char *date, char *result, int maxlen) tm.tm_hour = -1; tm.tm_min = -1; tm.tm_sec = -1; - offset = -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; @@ -611,11 +678,11 @@ int parse_date(const char *date, char *result, int maxlen) break; if (isalpha(c)) - match = match_alpha(date, &tm, &offset); + match = match_alpha(date, &tm, offset); else if (isdigit(c)) - match = match_digit(date, &tm, &offset, &tm_gmt); + match = match_digit(date, &tm, offset, &tm_gmt); else if ((c == '-' || c == '+') && isdigit(date[1])) - match = match_tz(date, &offset); + match = match_tz(date, offset); if (!match) { /* BAD CRAP */ @@ -626,16 +693,25 @@ int parse_date(const char *date, char *result, int maxlen) } /* mktime uses local timezone */ - then = tm_to_time_t(&tm); - if (offset == -1) - offset = (then - mktime(&tm)) / 60; + *timestamp = tm_to_time_t(&tm); + if (*offset == -1) + *offset = ((time_t)*timestamp - mktime(&tm)) / 60; - if (then == -1) + if (*timestamp == -1) return -1; if (!tm_gmt) - then -= offset * 60; - return date_string(then, offset, result, maxlen); + *timestamp -= *offset * 60; + return 0; /* success */ +} + +int parse_date(const char *date, char *result, int maxlen) +{ + unsigned long timestamp; + int offset; + if (parse_date_basic(date, ×tamp, &offset)) + return -1; + return date_string(timestamp, offset, result, maxlen); } enum date_mode parse_date_format(const char *format) @@ -983,26 +1059,27 @@ static unsigned long approxidate_str(const char *date, unsigned long approxidate_relative(const char *date, const struct timeval *tv) { - char buffer[50]; + unsigned long timestamp; + int offset; int errors = 0; - if (parse_date(date, buffer, sizeof(buffer)) > 0) - return strtoul(buffer, NULL, 0); - + if (!parse_date_basic(date, ×tamp, &offset)) + return timestamp; return approxidate_str(date, tv, &errors); } unsigned long approxidate_careful(const char *date, int *error_ret) { struct timeval tv; - char buffer[50]; + unsigned long timestamp; + int offset; int dummy = 0; if (!error_ret) error_ret = &dummy; - if (parse_date(date, buffer, sizeof(buffer)) > 0) { + if (!parse_date_basic(date, ×tamp, &offset)) { *error_ret = 0; - return strtoul(buffer, NULL, 0); + return timestamp; } gettimeofday(&tv, NULL); |