summaryrefslogtreecommitdiff
path: root/date.c
diff options
context:
space:
mode:
Diffstat (limited to 'date.c')
-rw-r--r--date.c373
1 files changed, 272 insertions, 101 deletions
diff --git a/date.c b/date.c
index 5d05ef61cf..733d1b29b1 100644
--- a/date.c
+++ b/date.c
@@ -9,7 +9,7 @@
/*
* This is like mktime, but without normalization of tm_wday and tm_yday.
*/
-time_t tm_to_time_t(const struct tm *tm)
+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
@@ -86,107 +86,136 @@ 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);
+ strbuf_addf(timebuf,
+ /* TRANSLATORS: "%s" is "<n> years" */
+ 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)
tz = local_tzoffset(time);
tm = time_to_tm(time, tz);
- if (!tm)
- return NULL;
+ if (!tm) {
+ tm = time_to_tm(0, 0);
+ tz = 0;
+ }
+
+ 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",
+ else if (mode == 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 == 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
- 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 +223,7 @@ 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 +258,7 @@ 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 +335,7 @@ 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 */
@@ -364,7 +394,7 @@ static int is_date(int year, int month, int day, struct tm *now_tm, time_t now,
* sense to specify timestamp way into the future. Make
* sure it is not later than ten days from now...
*/
- if (now + 10*24*3600 < specified)
+ if ((specified != -1) && (now + 10*24*3600 < specified))
return 0;
tm->tm_mon = r->tm_mon;
tm->tm_mday = r->tm_mday;
@@ -375,9 +405,9 @@ static int is_date(int year, int month, int day, struct tm *now_tm, time_t now,
return 0;
}
-static int match_multi_number(unsigned long num, char c, const char *date, char *end, struct tm *tm)
+static int match_multi_number(unsigned long num, char c, const char *date,
+ char *end, struct tm *tm, time_t now)
{
- time_t now;
struct tm now_tm;
struct tm *refuse_future;
long num2, num3;
@@ -403,17 +433,18 @@ static int match_multi_number(unsigned long num, char c, const char *date, char
case '-':
case '/':
case '.':
- now = time(NULL);
+ 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, refuse_future, now, tm))
+ if (is_date(num, num2, num3, NULL, now, tm))
break;
/* yyyy-dd-mm? */
- if (is_date(num, num3, num2, refuse_future, now, tm))
+ if (is_date(num, num3, num2, NULL, now, tm))
break;
}
/* Our eastern European friends say dd.mm.yy[yy]
@@ -483,7 +514,7 @@ static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt
case '/':
case '-':
if (isdigit(end[1])) {
- int match = match_multi_number(num, *end, date, end, tm);
+ int match = match_multi_number(num, *end, date, end, tm, 0);
if (match)
return match;
}
@@ -550,29 +581,41 @@ 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;
}
-static int date_string(unsigned long date, int offset, char *buf, int len)
+static void date_string(unsigned long date, int offset, struct strbuf *buf)
{
int sign = '+';
@@ -580,16 +623,49 @@ static int date_string(unsigned long date, int offset, char *buf, int len)
offset = -offset;
sign = '-';
}
- return snprintf(buf, len, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60);
+ strbuf_addf(buf, "%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 +675,12 @@ 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 +690,11 @@ 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 */
@@ -625,17 +704,59 @@ int parse_date(const char *date, char *result, int maxlen)
date += match;
}
- /* mktime uses local timezone */
- then = tm_to_time_t(&tm);
- if (offset == -1)
- offset = (then - mktime(&tm)) / 60;
-
- if (then == -1)
+ /* 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)
- then -= offset * 60;
- return date_string(then, offset, result, maxlen);
+ *timestamp -= *offset * 60;
+ return 0; /* success */
+}
+
+int parse_expiry_date(const char *date, unsigned long *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 = ULONG_MAX;
+ else
+ *timestamp = approxidate_careful(date, &errors);
+
+ return errors;
+}
+
+int parse_date(const char *date, struct strbuf *result)
+{
+ unsigned long timestamp;
+ int offset;
+ if (parse_date_basic(date, &timestamp, &offset))
+ return -1;
+ date_string(timestamp, offset, result);
+ return 0;
}
enum date_mode parse_date_format(const char *format)
@@ -645,6 +766,9 @@ enum date_mode parse_date_format(const char *format)
else if (!strcmp(format, "iso8601") ||
!strcmp(format, "iso"))
return DATE_ISO8601;
+ else if (!strcmp(format, "iso8601-strict") ||
+ !strcmp(format, "iso-strict"))
+ return DATE_ISO8601_STRICT;
else if (!strcmp(format, "rfc2822") ||
!strcmp(format, "rfc"))
return DATE_RFC2822;
@@ -660,7 +784,7 @@ enum date_mode parse_date_format(const char *format)
die("unknown date format %s", format);
}
-void datestamp(char *buf, int bufsize)
+void datestamp(struct strbuf *out)
{
time_t now;
int offset;
@@ -670,7 +794,7 @@ void datestamp(char *buf, int bufsize)
offset = tm_to_time_t(localtime(&now)) - now;
offset /= 60;
- date_string(now, offset, buf, bufsize);
+ date_string(now, offset, out);
}
/*
@@ -696,6 +820,11 @@ static unsigned long update_tm(struct tm *tm, struct tm *now, unsigned long sec)
return n;
}
+static void date_now(struct tm *tm, struct tm *now, int *num)
+{
+ update_tm(tm, now, 0);
+}
+
static void date_yesterday(struct tm *tm, struct tm *now, int *num)
{
update_tm(tm, now, 24*60*60);
@@ -770,6 +899,7 @@ static const struct special {
{ "PM", date_pm },
{ "AM", date_am },
{ "never", date_never },
+ { "now", date_now },
{ NULL }
};
@@ -790,20 +920,21 @@ static const struct typelen {
{ NULL }
};
-static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num)
+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));
+ 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;
}
}
@@ -812,6 +943,7 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
int len = strlen(s->name);
if (match_string(date, s->name) == len) {
s->fn(tm, now, num);
+ *touched = 1;
return end;
}
}
@@ -821,11 +953,14 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
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)
+ if (match_string(date, "last") == 4) {
*num = 1;
+ *touched = 1;
+ }
return end;
}
@@ -835,6 +970,7 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
if (match_string(date, tl->type) >= len-1) {
update_tm(tm, now, tl->length * *num);
*num = 0;
+ *touched = 1;
return end;
}
tl++;
@@ -852,6 +988,7 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
diff += 7*n;
update_tm(tm, now, diff * 24 * 60 * 60);
+ *touched = 1;
return end;
}
}
@@ -866,6 +1003,7 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
tm->tm_year--;
}
tm->tm_mon = n;
+ *touched = 1;
return end;
}
@@ -873,13 +1011,15 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
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)
+static const char *approxidate_digit(const char *date, struct tm *tm, int *num,
+ time_t now)
{
char *end;
unsigned long number = strtoul(date, &end, 10);
@@ -890,7 +1030,8 @@ static const char *approxidate_digit(const char *date, struct tm *tm, int *num)
case '/':
case '-':
if (isdigit(end[1])) {
- int match = match_multi_number(number, *end, date, end, tm);
+ int match = match_multi_number(number, *end, date, end,
+ tm, now);
if (match)
return date + match;
}
@@ -929,9 +1070,12 @@ static void pending_number(struct tm *tm, int *num)
}
}
-static unsigned long approxidate_str(const char *date, const struct timeval *tv)
+static unsigned long approxidate_str(const char *date,
+ const struct timeval *tv,
+ int *error_ret)
{
int number = 0;
+ int touched = 0;
struct tm tm, now;
time_t time_sec;
@@ -950,34 +1094,61 @@ static unsigned long approxidate_str(const char *date, const struct timeval *tv)
date++;
if (isdigit(c)) {
pending_number(&tm, &number);
- date = approxidate_digit(date-1, &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);
+ date = approxidate_alpha(date-1, &tm, &now, &number, &touched);
}
pending_number(&tm, &number);
+ if (!touched)
+ *error_ret = 1;
return update_tm(&tm, &now, 0);
}
unsigned long approxidate_relative(const char *date, const struct timeval *tv)
{
- char buffer[50];
-
- if (parse_date(date, buffer, sizeof(buffer)) > 0)
- return strtoul(buffer, NULL, 0);
+ unsigned long timestamp;
+ int offset;
+ int errors = 0;
- return approxidate_str(date, tv);
+ if (!parse_date_basic(date, &timestamp, &offset))
+ return timestamp;
+ return approxidate_str(date, tv, &errors);
}
-unsigned long approxidate(const char *date)
+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)
- return strtoul(buffer, NULL, 0);
+ if (!parse_date_basic(date, &timestamp, &offset)) {
+ *error_ret = 0;
+ return timestamp;
+ }
gettimeofday(&tv, NULL);
- return approxidate_str(date, &tv);
+ return approxidate_str(date, &tv, error_ret);
+}
+
+int date_overflows(unsigned long t)
+{
+ time_t sys;
+
+ /* If we overflowed our unsigned long, that's bad... */
+ if (t == ULONG_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);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 04:22:03 +0000