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authorRamkumar Ramachandra <artagnon@gmail.com>2010-06-03 20:28:55 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-06-07 22:52:43 (GMT)
commitc5043cc18579854681aa51ddb6e744fe2db24f51 (patch)
treed2119d4979b7ccd70f78409f32fc1b1d950c34d5 /date.c
parent7c42e390a37a11b1f7a77f5f07c261a8f930663a (diff)
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Refactor parse_date for approxidate functions
approxidate_relative and approxidate_careful both use parse_date to dump the timestamp to a character buffer and parse it back into a long unsigned using strtoul(). Avoid doing this by creating a new parse_date_toffset method. Noticed-by: Jonathan Nieder <jrnieder@gmail.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'date.c')
-rw-r--r--date.c56
1 files changed, 37 insertions, 19 deletions
diff --git a/date.c b/date.c
index 002aa3c..610ecf7 100644
--- a/date.c
+++ b/date.c
@@ -585,11 +585,17 @@ static int date_string(unsigned long date, int offset, char *buf, int len)
/* 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(const char *date, char *result, int maxlen)
+int parse_date_toffset(const char *date, unsigned long *timestamp, int *offset)
{
struct tm tm;
- int offset, tm_gmt;
- time_t then;
+ int tm_gmt;
+ unsigned long dummy_timestamp;
+ int dummy_offset;
+
+ if (!timestamp)
+ timestamp = &dummy_timestamp;
+ if (!offset)
+ offset = &dummy_offset;
memset(&tm, 0, sizeof(tm));
tm.tm_year = -1;
@@ -599,7 +605,7 @@ int parse_date(const char *date, char *result, int maxlen)
tm.tm_hour = -1;
tm.tm_min = -1;
tm.tm_sec = -1;
- offset = -1;
+ *offset = -1;
tm_gmt = 0;
for (;;) {
@@ -611,11 +617,11 @@ int parse_date(const char *date, char *result, int maxlen)
break;
if (isalpha(c))
- match = match_alpha(date, &tm, &offset);
+ match = match_alpha(date, &tm, offset);
else if (isdigit(c))
- match = match_digit(date, &tm, &offset, &tm_gmt);
+ match = match_digit(date, &tm, offset, &tm_gmt);
else if ((c == '-' || c == '+') && isdigit(date[1]))
- match = match_tz(date, &offset);
+ match = match_tz(date, offset);
if (!match) {
/* BAD CRAP */
@@ -626,16 +632,26 @@ int parse_date(const char *date, char *result, int maxlen)
}
/* mktime uses local timezone */
- then = tm_to_time_t(&tm);
- if (offset == -1)
- offset = (then - mktime(&tm)) / 60;
+ *timestamp = tm_to_time_t(&tm);
+ if (*offset == -1)
+ *offset = (*timestamp - mktime(&tm)) / 60;
- if (then == -1)
+ if (*timestamp == -1)
return -1;
if (!tm_gmt)
- then -= offset * 60;
- return date_string(then, offset, result, maxlen);
+ *timestamp -= *offset * 60;
+ return 1; /* success */
+}
+
+int parse_date(const char *date, char *result, int maxlen)
+{
+ unsigned long timestamp;
+ int offset;
+ if (parse_date_toffset(date, &timestamp, &offset) > 0)
+ return date_string(timestamp, offset, result, maxlen);
+ else
+ return -1;
}
enum date_mode parse_date_format(const char *format)
@@ -983,11 +999,12 @@ static unsigned long approxidate_str(const char *date,
unsigned long approxidate_relative(const char *date, const struct timeval *tv)
{
- char buffer[50];
+ unsigned long timestamp;
+ int offset;
int errors = 0;
- if (parse_date(date, buffer, sizeof(buffer)) > 0)
- return strtoul(buffer, NULL, 0);
+ if (parse_date_toffset(date, &timestamp, &offset) > 0)
+ return timestamp;
return approxidate_str(date, tv, &errors);
}
@@ -995,14 +1012,15 @@ unsigned long approxidate_relative(const char *date, const struct timeval *tv)
unsigned long approxidate_careful(const char *date, int *error_ret)
{
struct timeval tv;
- char buffer[50];
+ unsigned long timestamp;
+ int offset;
int dummy = 0;
if (!error_ret)
error_ret = &dummy;
- if (parse_date(date, buffer, sizeof(buffer)) > 0) {
+ if (parse_date_toffset(date, &timestamp, &offset) > 0) {
*error_ret = 0;
- return strtoul(buffer, NULL, 0);
+ return timestamp;
}
gettimeofday(&tv, NULL);