Sync with maint
[gitweb.git] / date.c
diff --git a/date.c b/date.c
index 782de95d90c6ac1a02ddfa0df81ca93ecdf910c4..8f9156909b8d9d2cad6425aa44deebdcd01b2168 100644 (file)
--- a/date.c
+++ b/date.c
@@ -160,18 +160,27 @@ 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;
+       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_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);
@@ -180,7 +189,7 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode)
                return timebuf.buf;
        }
 
-       if (mode == DATE_LOCAL)
+       if (mode->type == DATE_LOCAL)
                tz = local_tzoffset(time);
 
        tm = time_to_tm(time, tz);
@@ -190,21 +199,32 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode)
        }
 
        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],
@@ -212,7 +232,7 @@ 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->type == DATE_LOCAL) ? 0 : ' ',
                                tz);
        return timebuf.buf;
 }
@@ -396,9 +416,9 @@ 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;
@@ -424,17 +444,18 @@ 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]
@@ -504,7 +525,7 @@ 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;
                }
@@ -605,7 +626,7 @@ 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 = '+';
 
@@ -613,7 +634,7 @@ 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);
 }
 
 /*
@@ -694,10 +715,17 @@ 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 {
@@ -705,9 +733,6 @@ 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 */
@@ -735,38 +760,45 @@ 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)
+void parse_date_format(const char *format, struct date_mode *mode)
 {
        if (!strcmp(format, "relative"))
-               return DATE_RELATIVE;
+               mode->type = DATE_RELATIVE;
        else if (!strcmp(format, "iso8601") ||
                 !strcmp(format, "iso"))
-               return DATE_ISO8601;
+               mode->type = DATE_ISO8601;
+       else if (!strcmp(format, "iso8601-strict") ||
+                !strcmp(format, "iso-strict"))
+               mode->type = DATE_ISO8601_STRICT;
        else if (!strcmp(format, "rfc2822") ||
                 !strcmp(format, "rfc"))
-               return DATE_RFC2822;
+               mode->type = DATE_RFC2822;
        else if (!strcmp(format, "short"))
-               return DATE_SHORT;
+               mode->type = DATE_SHORT;
        else if (!strcmp(format, "local"))
-               return DATE_LOCAL;
+               mode->type = DATE_LOCAL;
        else if (!strcmp(format, "default"))
-               return DATE_NORMAL;
+               mode->type = DATE_NORMAL;
        else if (!strcmp(format, "raw"))
-               return DATE_RAW;
-       else
+               mode->type = DATE_RAW;
+       else if (skip_prefix(format, "format:", &format)) {
+               mode->type = DATE_STRFTIME;
+               mode->strftime_fmt = xstrdup(format);
+       } else
                die("unknown date format %s", format);
 }
 
-void datestamp(char *buf, int bufsize)
+void datestamp(struct strbuf *out)
 {
        time_t now;
        int offset;
@@ -776,7 +808,7 @@ 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);
 }
 
 /*
@@ -1000,7 +1032,8 @@ 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);
@@ -1011,7 +1044,8 @@ 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;
                }
@@ -1074,7 +1108,7 @@ 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;
                }