X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=date.c;h=49f943e25b5dc4f288963077f5eabaf24f651aab;hb=4a1ab0f3898633edd60f3f3ca31d09ae46d63029;hp=3eba2dfe8841cee28850e2f1f4177e1e32f1c8a8;hpb=1d03f0dffab250aeffd10eba0368b88cf61c6e6b;p=platform%2Fupstream%2Fgit.git

diff --git a/date.c b/date.c
index 3eba2df..49f943e 100644
--- a/date.c
+++ b/date.c
@@ -39,14 +39,24 @@ static const char *weekday_names[] = {
 	"Sundays", "Mondays", "Tuesdays", "Wednesdays", "Thursdays", "Fridays", "Saturdays"
 };
 
-static time_t gm_time_t(unsigned long time, int tz)
+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;
-	return time + minutes * 60;
+
+	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;
 }
 
 /*
@@ -54,26 +64,37 @@ static time_t gm_time_t(unsigned long time, int 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(unsigned long time, int tz)
+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);
+}
+
 /*
  * What value of "tz" was in effect back then at "time" in the
  * local timezone?
  */
-static int local_tzoffset(unsigned long time)
+static int local_tzoffset(timestamp_t time)
 {
 	time_t t, t_local;
 	struct tm tm;
 	int offset, eastwest;
 
-	t = time;
+	if (date_overflows(time))
+		die("Timestamp too large for this system: %"PRItime, time);
+
+	t = (time_t)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;
@@ -86,11 +107,11 @@ static int local_tzoffset(unsigned long time)
 	return offset * eastwest;
 }
 
-void show_date_relative(unsigned long time, int tz,
+void show_date_relative(timestamp_t time, int tz,
 			       const struct timeval *now,
 			       struct strbuf *timebuf)
 {
-	unsigned long diff;
+	timestamp_t diff;
 	if (now->tv_sec < time) {
 		strbuf_addstr(timebuf, _("in the future"));
 		return;
@@ -98,80 +119,99 @@ void show_date_relative(unsigned long time, int tz,
 	diff = now->tv_sec - time;
 	if (diff < 90) {
 		strbuf_addf(timebuf,
-			 Q_("%lu second ago", "%lu seconds ago", diff), diff);
+			 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_("%lu minute ago", "%lu minutes ago", diff), diff);
+			 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_("%lu hour ago", "%lu hours ago", diff), diff);
+			 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_("%lu day ago", "%lu days ago", diff), diff);
+			 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_("%lu week ago", "%lu weeks ago", (diff + 3) / 7),
+			 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_("%lu month ago", "%lu months ago", (diff + 15) / 30),
+			 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) {
-		unsigned long totalmonths = (diff * 12 * 2 + 365) / (365 * 2);
-		unsigned long years = totalmonths / 12;
-		unsigned long months = totalmonths % 12;
+		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_("%lu year", "%lu years", years), years);
+			strbuf_addf(&sb, Q_("%"PRItime" year", "%"PRItime" years", years), years);
 			strbuf_addf(timebuf,
 				 /* TRANSLATORS: "%s" is "<n> years" */
-				 Q_("%s, %lu month ago", "%s, %lu months ago", months),
+				 Q_("%s, %"PRItime" month ago", "%s, %"PRItime" months ago", months),
 				 sb.buf, months);
 			strbuf_release(&sb);
 		} else
 			strbuf_addf(timebuf,
-				 Q_("%lu year ago", "%lu years ago", years), years);
+				 Q_("%"PRItime" year ago", "%"PRItime" years ago", years), years);
 		return;
 	}
 	/* Otherwise, just years. Centuries is probably overkill. */
 	strbuf_addf(timebuf,
-		 Q_("%lu year ago", "%lu years ago", (diff + 183) / 365),
+		 Q_("%"PRItime" year ago", "%"PRItime" years ago", (diff + 183) / 365),
 		 (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)
+		BUG("cannot create anonymous strftime date_mode struct");
+	mode.type = type;
+	mode.local = 0;
+	return &mode;
+}
+
+const char *show_date(timestamp_t 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, "%"PRItime, 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);
+		strbuf_addf(&timebuf, "%"PRItime" %+05d", time, tz);
 		return timebuf.buf;
 	}
 
-	if (mode == DATE_RELATIVE) {
+	if (mode->type == DATE_RELATIVE) {
 		struct timeval now;
 
 		strbuf_reset(&timebuf);
@@ -180,27 +220,27 @@ 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 (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 == 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_ISO8601_STRICT) {
+	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",
@@ -209,11 +249,14 @@ 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,
 				sign, tz / 100, tz % 100);
-	} else if (mode == DATE_RFC2822)
+	} 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
 		strbuf_addf(&timebuf, "%.3s %.3s %d %02d:%02d:%02d %d%c%+05d",
 				weekday_names[tm->tm_wday],
@@ -221,7 +264,7 @@ 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;
 }
@@ -405,7 +448,7 @@ 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,
+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;
@@ -488,9 +531,9 @@ static int match_digit(const char *date, struct tm *tm, int *offset, int *tm_gmt
 {
 	int n;
 	char *end;
-	unsigned long num;
+	timestamp_t num;
 
-	num = strtoul(date, &end, 10);
+	num = parse_timestamp(date, &end, 10);
 
 	/*
 	 * Seconds since 1970? We trigger on that for any numbers with
@@ -615,7 +658,7 @@ static int match_tz(const char *date, int *offp)
 	return end - date;
 }
 
-static void date_string(unsigned long date, int offset, struct strbuf *buf)
+static void date_string(timestamp_t date, int offset, struct strbuf *buf)
 {
 	int sign = '+';
 
@@ -623,23 +666,23 @@ static void date_string(unsigned long date, int offset, struct strbuf *buf)
 		offset = -offset;
 		sign = '-';
 	}
-	strbuf_addf(buf, "%lu %c%02d%02d", date, sign, offset / 60, offset % 60);
+	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, unsigned long *timestamp, int *offset)
+static int match_object_header_date(const char *date, timestamp_t *timestamp, int *offset)
 {
 	char *end;
-	unsigned long stamp;
+	timestamp_t stamp;
 	int ofs;
 
 	if (*date < '0' || '9' < *date)
 		return -1;
-	stamp = strtoul(date, &end, 10);
-	if (*end != ' ' || stamp == ULONG_MAX || (end[1] != '+' && end[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);
@@ -655,11 +698,11 @@ static int match_object_header_date(const char *date, unsigned long *timestamp,
 
 /* 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, unsigned long *timestamp, int *offset)
+int parse_date_basic(const char *date, timestamp_t *timestamp, int *offset)
 {
 	struct tm tm;
 	int tm_gmt;
-	unsigned long dummy_timestamp;
+	timestamp_t dummy_timestamp;
 	int dummy_offset;
 
 	if (!timestamp)
@@ -704,10 +747,17 @@ 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 {
@@ -715,15 +765,12 @@ 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 */
 }
 
-int parse_expiry_date(const char *date, unsigned long *timestamp)
+int parse_expiry_date(const char *date, timestamp_t *timestamp)
 {
 	int errors = 0;
 
@@ -738,7 +785,7 @@ int parse_expiry_date(const char *date, unsigned long *timestamp)
 		 * of the past, and there is nothing from the future
 		 * to be kept.
 		 */
-		*timestamp = ULONG_MAX;
+		*timestamp = TIME_MAX;
 	else
 		*timestamp = approxidate_careful(date, &errors);
 
@@ -747,7 +794,7 @@ int parse_expiry_date(const char *date, unsigned long *timestamp)
 
 int parse_date(const char *date, struct strbuf *result)
 {
-	unsigned long timestamp;
+	timestamp_t timestamp;
 	int offset;
 	if (parse_date_basic(date, &timestamp, &offset))
 		return -1;
@@ -755,28 +802,52 @@ int parse_date(const char *date, struct strbuf *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"))
-		return DATE_ISO8601;
-	else if (!strcmp(format, "iso8601-strict") ||
-		 !strcmp(format, "iso-strict"))
+	if (skip_prefix(format, "iso8601-strict", end) ||
+	    skip_prefix(format, "iso-strict", end))
 		return DATE_ISO8601_STRICT;
-	else if (!strcmp(format, "rfc2822") ||
-		 !strcmp(format, "rfc"))
+	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;
-	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);
 }
 
@@ -797,7 +868,7 @@ void datestamp(struct strbuf *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 unsigned long update_tm(struct tm *tm, struct tm *now, unsigned long sec)
+static time_t update_tm(struct tm *tm, struct tm *now, time_t sec)
 {
 	time_t n;
 
@@ -1018,7 +1089,7 @@ 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);
+	timestamp_t number = parse_timestamp(date, &end, 10);
 
 	switch (*end) {
 	case ':':
@@ -1066,9 +1137,9 @@ static void pending_number(struct tm *tm, int *num)
 	}
 }
 
-static unsigned long approxidate_str(const char *date,
-				     const struct timeval *tv,
-				     int *error_ret)
+static timestamp_t approxidate_str(const char *date,
+				   const struct timeval *tv,
+				   int *error_ret)
 {
 	int number = 0;
 	int touched = 0;
@@ -1100,12 +1171,12 @@ static unsigned long approxidate_str(const char *date,
 	pending_number(&tm, &number);
 	if (!touched)
 		*error_ret = 1;
-	return update_tm(&tm, &now, 0);
+	return (timestamp_t)update_tm(&tm, &now, 0);
 }
 
-unsigned long approxidate_relative(const char *date, const struct timeval *tv)
+timestamp_t approxidate_relative(const char *date, const struct timeval *tv)
 {
-	unsigned long timestamp;
+	timestamp_t timestamp;
 	int offset;
 	int errors = 0;
 
@@ -1114,10 +1185,10 @@ unsigned long approxidate_relative(const char *date, const struct timeval *tv)
 	return approxidate_str(date, tv, &errors);
 }
 
-unsigned long approxidate_careful(const char *date, int *error_ret)
+timestamp_t approxidate_careful(const char *date, int *error_ret)
 {
 	struct timeval tv;
-	unsigned long timestamp;
+	timestamp_t timestamp;
 	int offset;
 	int dummy = 0;
 	if (!error_ret)
@@ -1132,12 +1203,12 @@ unsigned long approxidate_careful(const char *date, int *error_ret)
 	return approxidate_str(date, &tv, error_ret);
 }
 
-int date_overflows(unsigned long t)
+int date_overflows(timestamp_t t)
 {
 	time_t sys;
 
-	/* If we overflowed our unsigned long, that's bad... */
-	if (t == ULONG_MAX)
+	/* If we overflowed our timestamp data type, that's bad... */
+	if ((uintmax_t)t >= TIME_MAX)
 		return 1;
 
 	/*