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[gamecode] Conform with libc malloc for pr zone

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Allocating 0 bytes returns null and freeing a null pointer is safe.
This commit is contained in:
Bill Currie 2021-09-26 12:03:44 +09:00
parent ac25d9f1c1
commit 349f8067c3
1 changed files with 21 additions and 7 deletions
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28
libs/gamecode/pr_zone.c
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@ -64,22 +64,32 @@ PR_Zone_Init (progs_t *pr)
VISIBLE void
PR_Zone_Free (progs_t *pr, void *ptr)
{
Z_Free (pr->zone, ptr);
if (ptr) {
Z_Free (pr->zone, ptr);
}
}
VISIBLE void *
PR_Zone_Malloc (progs_t *pr, pr_int_t size)
{
if (size <= 0)
PR_RunError (pr, "attempt to allocate less than 1 byte");
if (!size) {
return 0;
}
if (size < 0) {
PR_RunError (pr, "attempt to allocate less than 0 bytes");
}
return Z_Malloc (pr->zone, size);
}
VISIBLE void *
PR_Zone_TagMalloc (progs_t *pr, int size, int tag)
{
if (size <= 0)
PR_RunError (pr, "attempt to allocate less than 1 byte");
if (!size) {
return 0;
}
if (size < 0) {
PR_RunError (pr, "attempt to allocate less than 0 bytes");
}
return Z_TagMalloc (pr->zone, size, tag);
}
@ -90,7 +100,11 @@ PR_Zone_Realloc (progs_t *pr, void *ptr, pr_int_t size)
Z_Free (pr->zone, ptr);
return 0;
}
if (size <= 0)
PR_RunError (pr, "attempt to allocate less than 1 byte");
if (!size) {
return 0;
}
if (size < 0) {
PR_RunError (pr, "attempt to allocate less than 0 bytes");
}
return Z_Realloc (pr->zone, ptr, size);
}