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Merge branch 'dd/time-reentrancy'

Browse source 
Avoid gmtime() and localtime() and prefer their reentrant
counterparts.

* dd/time-reentrancy:
  mingw: use {gm,local}time_s as backend for {gm,local}time_r
  archive-zip.c: switch to reentrant localtime_r
  date.c: switch to reentrant {gm,local}time_r
This commit is contained in:
Junio C Hamano 2019-12-16 13:08:31 -08:00
parent 37c2619d91 0109d676f9
commit 4755a34c47
3 changed files with 21 additions and 19 deletions
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10
archive-zip.c
View file

@ -603,18 +603,18 @@ static void write_zip_trailer(const struct object_id *oid)
static void dos_time(timestamp_t *timestamp, int *dos_date, int *dos_time)
{
time_t time;
struct tm *t;
struct tm tm;
if (date_overflows(*timestamp))
die(_("timestamp too large for this system: %"PRItime),
*timestamp);
time = (time_t)*timestamp;
t = localtime(&time);
localtime_r(&time, &tm);
*timestamp = time;
*dos_date = t->tm_mday + (t->tm_mon + 1) * 32 +
(t->tm_year + 1900 - 1980) * 512;
*dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048;
*dos_date = tm.tm_mday + (tm.tm_mon + 1) * 32 +
(tm.tm_year + 1900 - 1980) * 512;
*dos_time = tm.tm_sec / 2 + tm.tm_min * 32 + tm.tm_hour * 2048;
}
static int archive_zip_config(const char *var, const char *value, void *data)

12
compat/mingw.c
View file

@ -1018,16 +1018,16 @@ int pipe(int filedes[2])
struct tm *gmtime_r(const time_t *timep, struct tm *result)
{
/* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
memcpy(result, gmtime(timep), sizeof(struct tm));
return result;
if (gmtime_s(result, timep) == 0)
return result;
return NULL;
}
struct tm *localtime_r(const time_t *timep, struct tm *result)
{
/* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
memcpy(result, localtime(timep), sizeof(struct tm));
return result;
if (localtime_s(result, timep) == 0)
return result;
return NULL;
}
char *mingw_getcwd(char *pointer, int len)

18
date.c
View file

@ -64,16 +64,16 @@ static time_t gm_time_t(timestamp_t 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(timestamp_t time, int tz)
static struct tm *time_to_tm(timestamp_t time, int tz, struct tm *tm)
{
time_t t = gm_time_t(time, tz);
return gmtime(&t);
return gmtime_r(&t, tm);
}
static struct tm *time_to_tm_local(timestamp_t time)
static struct tm *time_to_tm_local(timestamp_t time, struct tm *tm)
{
time_t t = time;
return localtime(&t);
return localtime_r(&t, tm);
}
/*
@ -283,6 +283,7 @@ static void show_date_normal(struct strbuf *buf, timestamp_t time, struct tm *tm
const char *show_date(timestamp_t time, int tz, const struct date_mode *mode)
{
struct tm *tm;
struct tm tmbuf = { 0 };
struct tm human_tm = { 0 };
int human_tz = -1;
static struct strbuf timebuf = STRBUF_INIT;
@ -318,11 +319,11 @@ const char *show_date(timestamp_t time, int tz, const struct date_mode *mode)
}
if (mode->local)
tm = time_to_tm_local(time);
tm = time_to_tm_local(time, &tmbuf);
else
tm = time_to_tm(time, tz);
tm = time_to_tm(time, tz, &tmbuf);
if (!tm) {
tm = time_to_tm(0, 0);
tm = time_to_tm(0, 0, &tmbuf);
tz = 0;
}
@ -959,10 +960,11 @@ void datestamp(struct strbuf *out)
{
time_t now;
int offset;
struct tm tm = { 0 };
time(&now);
offset = tm_to_time_t(localtime(&now)) - now;
offset = tm_to_time_t(localtime_r(&now, &tm)) - now;
offset /= 60;
date_string(now, offset, out);