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Diffstat (limited to 'date.c')
-rw-r--r--date.c173
1 files changed, 128 insertions, 45 deletions
diff --git a/date.c b/date.c
index 83b4166344..a996331f5b 100644
--- a/date.c
+++ b/date.c
@@ -74,6 +74,8 @@ static int local_tzoffset(unsigned long time)
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;
@@ -144,8 +146,8 @@ void show_date_relative(unsigned long time, int tz,
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,
+ /* TRANSLATORS: "%s" is "<n> years" */
Q_("%s, %lu month ago", "%s, %lu months ago", months),
sb.buf, months);
strbuf_release(&sb);
@@ -160,18 +162,37 @@ void show_date_relative(unsigned long time, int tz,
(diff + 183) / 365);
}
-const char *show_date(unsigned long time, int tz, enum date_mode mode)
+struct date_mode *date_mode_from_type(enum date_mode_type type)
+{
+ static struct date_mode mode;
+ if (type == DATE_STRFTIME)
+ die("BUG: cannot create anonymous strftime date_mode struct");
+ mode.type = type;
+ mode.local = 0;
+ return &mode;
+}
+
+const char *show_date(unsigned long time, int tz, const struct date_mode *mode)
{
struct tm *tm;
static struct strbuf timebuf = STRBUF_INIT;
- if (mode == DATE_RAW) {
+ if (mode->type == DATE_UNIX) {
+ strbuf_reset(&timebuf);
+ strbuf_addf(&timebuf, "%lu", time);
+ return timebuf.buf;
+ }
+
+ if (mode->local)
+ tz = local_tzoffset(time);
+
+ if (mode->type == DATE_RAW) {
strbuf_reset(&timebuf);
strbuf_addf(&timebuf, "%lu %+05d", time, tz);
return timebuf.buf;
}
- if (mode == DATE_RELATIVE) {
+ if (mode->type == DATE_RELATIVE) {
struct timeval now;
strbuf_reset(&timebuf);
@@ -180,29 +201,39 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode)
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)
+ 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 == DATE_ISO8601)
+ 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 == DATE_RFC2822)
+ 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_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);
else
strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d",
weekday_names[tm->tm_wday],
@@ -210,7 +241,7 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode)
tm->tm_mday,
tm->tm_hour, tm->tm_min, tm->tm_sec,
tm->tm_year + 1900,
- (mode == DATE_LOCAL) ? 0 : ' ',
+ mode->local ? 0 : ' ',
tz);
return timebuf.buf;
}
@@ -394,9 +425,9 @@ 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;
@@ -422,17 +453,18 @@ 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]
@@ -502,7 +534,7 @@ 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;
}
@@ -603,7 +635,7 @@ static int match_tz(const char *date, int *offp)
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 = '+';
@@ -611,7 +643,7 @@ 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);
}
/*
@@ -692,10 +724,17 @@ int parse_date_basic(const char *date, unsigned long *timestamp, int *offset)
date += match;
}
- /* mktime uses local timezone */
+ /* 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 = mktime(&tm);
+ 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 {
@@ -703,9 +742,6 @@ int parse_date_basic(const char *date, unsigned long *timestamp, int *offset)
}
}
- if (*timestamp == -1)
- return -1;
-
if (!tm_gmt)
*timestamp -= *offset * 60;
return 0; /* success */
@@ -733,38 +769,66 @@ int parse_expiry_date(const char *date, unsigned long *timestamp)
return errors;
}
-int parse_date(const char *date, char *result, int maxlen)
+int parse_date(const char *date, struct strbuf *result)
{
unsigned long timestamp;
int offset;
if (parse_date_basic(date, &timestamp, &offset))
return -1;
- return date_string(timestamp, offset, result, maxlen);
+ date_string(timestamp, offset, result);
+ return 0;
}
-enum date_mode parse_date_format(const char *format)
+static enum date_mode_type parse_date_type(const char *format, const char **end)
{
- if (!strcmp(format, "relative"))
+ if (skip_prefix(format, "relative", end))
return DATE_RELATIVE;
- else if (!strcmp(format, "iso8601") ||
- !strcmp(format, "iso"))
+ 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;
- else if (!strcmp(format, "rfc2822") ||
- !strcmp(format, "rfc"))
+ if (skip_prefix(format, "rfc2822", end) ||
+ skip_prefix(format, "rfc", end))
return DATE_RFC2822;
- else if (!strcmp(format, "short"))
+ if (skip_prefix(format, "short", end))
return DATE_SHORT;
- else if (!strcmp(format, "local"))
- return DATE_LOCAL;
- else if (!strcmp(format, "default"))
+ if (skip_prefix(format, "default", end))
return DATE_NORMAL;
- else if (!strcmp(format, "raw"))
+ if (skip_prefix(format, "raw", end))
return DATE_RAW;
- else
+ if (skip_prefix(format, "unix", end))
+ return DATE_UNIX;
+ if (skip_prefix(format, "format", end))
+ return DATE_STRFTIME;
+
+ die("unknown date format %s", format);
+}
+
+void parse_date_format(const char *format, struct date_mode *mode)
+{
+ const char *p;
+
+ /* 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(char *buf, int bufsize)
+void datestamp(struct strbuf *out)
{
time_t now;
int offset;
@@ -774,7 +838,7 @@ 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);
}
/*
@@ -998,7 +1062,8 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
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);
@@ -1009,7 +1074,8 @@ 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;
}
@@ -1072,7 +1138,7 @@ static unsigned long approxidate_str(const char *date,
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;
}
@@ -1113,3 +1179,20 @@ unsigned long approxidate_careful(const char *date, int *error_ret)
gettimeofday(&tv, NULL);
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 2025-01-02 10:05:14 +0000