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Clean up "stopgap" implementation of timestamptz_to_str().

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Use correct type for "result", fix bogus strftime argument, don't use
unnecessary static variables, improve comments.

Andres Freund and Tom Lane
This commit is contained in:
Tom Lane 2013-02-26 15:50:22 -05:00
parent c153530dc1
commit 1418e6e07b
1 changed files with 12 additions and 7 deletions
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19
contrib/pg_xlogdump/compat.c
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@ -41,25 +41,30 @@ timestamptz_to_time_t(TimestampTz t)
/*
* Stopgap implementation of timestamptz_to_str that doesn't depend on backend
* infrastructure.
* infrastructure. This will work for timestamps that are within the range
* of the platform time_t type. (pg_time_t is compatible except for possibly
* being wider.)
*
* XXX the return value points to a static buffer, so beware of using more
* than one result value concurrently.
*
* XXX: The backend timestamp infrastructure should instead be split out and
* moved into src/common.
* moved into src/common. That's a large project though.
*/
const char *
timestamptz_to_str(TimestampTz dt)
{
static char buf[MAXDATELEN + 1];
static char ts[MAXDATELEN + 1];
static char zone[MAXDATELEN + 1];
pg_time_t result = timestamptz_to_time_t(dt);
char ts[MAXDATELEN + 1];
char zone[MAXDATELEN + 1];
time_t result = (time_t) timestamptz_to_time_t(dt);
struct tm *ltime = localtime(&result);
strftime(ts, sizeof(zone), "%Y-%m-%d %H:%M:%S", ltime);
strftime(ts, sizeof(ts), "%Y-%m-%d %H:%M:%S", ltime);
strftime(zone, sizeof(zone), "%Z", ltime);
#ifdef HAVE_INT64_TIMESTAMP
sprintf(buf, "%s.%06d %s", ts, (int)(dt % USECS_PER_SEC), zone);
sprintf(buf, "%s.%06d %s", ts, (int) (dt % USECS_PER_SEC), zone);
#else
sprintf(buf, "%s.%.6f %s", ts, fabs(dt - floor(dt)), zone);
#endif