[PATCH 2/2] apply: remove epoch date from regex

[René Scharfe]

We check the date of epoch timestamp candidates already with
starts_with().  Move beyond that part using skip_prefix() instead of
checking it again using a regular expression.  Also group the minutes
part, so that we can access them using a substring match instead of
using a magic number.

Signed-off-by: Rene Scharfe <l....@web.de>
---
 apply.c | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/apply.c b/apply.c
index e14077eaee..9c70b4040a 100644
--- a/apply.c
+++ b/apply.c
@@ -811,9 +811,7 @@ static int has_epoch_timestamp(const char *nameline)
         * 1970-01-01, and the seconds part must be "00".
         */
        const char stamp_regexp[] =
-               "^(1969-12-31|1970-01-01)"
-               " "
-               "[0-2][0-9]:[0-5][0-9]:00(\\.0+)?"
+               "^[0-2][0-9]:([0-5][0-9]):00(\\.0+)?"
                " "
                "([-+][0-2][0-9]:?[0-5][0-9])\n";
        const char *timestamp = NULL, *cp, *colon;
@@ -833,9 +831,9 @@ static int has_epoch_timestamp(const char *nameline)
         * YYYY-MM-DD hh:mm:ss must be from either 1969-12-31
         * (west of GMT) or 1970-01-01 (east of GMT)
         */
-       if (starts_with(timestamp, "1969-12-31"))
+       if (skip_prefix(timestamp, "1969-12-31 ", &timestamp))
                epoch_hour = 24;
-       else if (starts_with(timestamp, "1970-01-01"))
+       else if (skip_prefix(timestamp, "1970-01-01 ", &timestamp))
                epoch_hour = 0;
        else
                return 0;
@@ -857,8 +855,8 @@ static int has_epoch_timestamp(const char *nameline)
                return 0;
        }
 
-       hour = strtol(timestamp + 11, NULL, 10);
-       minute = strtol(timestamp + 14, NULL, 10);
+       hour = strtol(timestamp, NULL, 10);
+       minute = strtol(timestamp + m[1].rm_so, NULL, 10);
 
        zoneoffset = strtol(timestamp + m[3].rm_so + 1, (char **) &colon, 10);
        if (*colon == ':')
-- 
2.14.1