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Portability fix for old SunOS releases: realloc(NULL, ...)

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doesn't work there.
This commit is contained in:
Tom Lane 1998-11-29 01:53:54 +00:00
parent 79fcde48b2
commit 67531c42bd
1 changed files with 12 additions and 6 deletions
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18
src/interfaces/libpq/fe-exec.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.70 1998/11/18 00:47:28 tgl Exp $
* $Header: /cvsroot/pgsql/src/interfaces/libpq/fe-exec.c,v 1.71 1998/11/29 01:53:54 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -343,17 +343,23 @@ addTuple(PGresult *res, PGresAttValue *tup)
*
* We can use realloc because shallow copying of the structure is
* okay. Note that the first time through, res->tuples is NULL.
* realloc is supposed to do the right thing in that case. Also,
* on failure realloc is supposed to return NULL without damaging
* While ANSI says that realloc() should act like malloc() in that
* case, some old C libraries (like SunOS 4.1.x) coredump instead.
* On failure realloc is supposed to return NULL without damaging
* the existing allocation.
* Note that the positions beyond res->ntups are garbage, not
* necessarily NULL.
*/
int newSize = (res->tupArrSize > 0) ? res->tupArrSize * 2 : 128;
PGresAttValue ** newTuples = (PGresAttValue **)
realloc(res->tuples, newSize * sizeof(PGresAttValue *));
PGresAttValue ** newTuples;
if (res->tuples == NULL)
newTuples = (PGresAttValue **)
malloc(newSize * sizeof(PGresAttValue *));
else
newTuples = (PGresAttValue **)
realloc(res->tuples, newSize * sizeof(PGresAttValue *));
if (! newTuples)
return FALSE; /* realloc failed */
return FALSE; /* malloc or realloc failed */
res->tupArrSize = newSize;
res->tuples = newTuples;
}