diff options
Diffstat (limited to 'src/backend/utils/adt/timestamp.c')
| -rw-r--r-- | src/backend/utils/adt/timestamp.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c index 1277562b794..f450922f26e 100644 --- a/src/backend/utils/adt/timestamp.c +++ b/src/backend/utils/adt/timestamp.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.184 2008/01/01 19:45:52 momjian Exp $ + * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.185 2008/02/17 02:09:28 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -1264,9 +1264,14 @@ TimestampDifferenceExceeds(TimestampTz start_time, * * We do not use time_t internally in Postgres, but this is provided for use * by functions that need to interpret, say, a stat(2) result. + * + * To avoid having the function's ABI vary depending on the width of time_t, + * we declare the argument as pg_time_t, which is cast-compatible with + * time_t but always 64 bits wide (unless the platform has no 64-bit type). + * This detail should be invisible to callers, at least at source code level. */ TimestampTz -time_t_to_timestamptz(time_t tm) +time_t_to_timestamptz(pg_time_t tm) { TimestampTz result; @@ -1284,17 +1289,22 @@ time_t_to_timestamptz(time_t tm) * Convert a TimestampTz to time_t. * * This too is just marginally useful, but some places need it. + * + * To avoid having the function's ABI vary depending on the width of time_t, + * we declare the result as pg_time_t, which is cast-compatible with + * time_t but always 64 bits wide (unless the platform has no 64-bit type). + * This detail should be invisible to callers, at least at source code level. */ -time_t +pg_time_t timestamptz_to_time_t(TimestampTz t) { - time_t result; + pg_time_t result; #ifdef HAVE_INT64_TIMESTAMP - result = (time_t) (t / USECS_PER_SEC + + result = (pg_time_t) (t / USECS_PER_SEC + ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY)); #else - result = (time_t) (t + + result = (pg_time_t) (t + ((POSTGRES_EPOCH_JDATE - UNIX_EPOCH_JDATE) * SECS_PER_DAY)); #endif |