Add "Z" as an alias for the timezone "UTC"

The name "Z" for the UTC timezone is required to properly parse ISO 8601
timestamps.  Add it to the list of recognized timezones.

Because timezone names can be shorter than 3 letters, loosen the
restriction in match_alpha() that used to require at least 3 letters to
match to allow a short timezone name as long as it matches exactly.  Prior
to the introduction of the "Z" zone, this already affected the timezone
"NT" (Nome).

Signed-off-by: Marcus Comstedt <marcus@mc.pp.se>
Reviewed-by: Jay Soffian <jaysoffian@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/date.c b/date.c
index 002aa3c8d6d4ff08d8790a155b8979bc117a2b95..6bae49ca330a69df5e2cf29e1e461f2490d99b2f 100644 (file)
--- a/date.c
+++ b/date.c
@@ -229,6 +229,7 @@ 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 +306,7 @@ 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 */