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make realloc behave like most Unix realloc versions when handed a

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null pointer
This commit is contained in:
ceriel 1989-03-29 12:58:18 +00:00
parent c5345bf6ac
commit 4797a7d4ce
1 changed files with 8 additions and 1 deletions
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9
modules/src/malloc/mal.c
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@ -221,9 +221,16 @@ realloc(addr, n)
char *addr; char *addr;
register unsigned int n; register unsigned int n;
{check_mallinks("realloc entry");{ {check_mallinks("realloc entry");{
register mallink *ml = mallink_of_block(addr), *ph_next; register mallink *ml, *ph_next;
register unsigned int size; register unsigned int size;
if (addr == 0) {
/* Behave like most Unix realloc's when handed a
null-pointer
*/
return malloc(n);
}
ml = mallink_of_block(addr);
if (n < MIN_SIZE) n = align(MIN_SIZE); else n = align(n); if (n < MIN_SIZE) n = align(MIN_SIZE); else n = align(n);
if (free_of(ml)) { if (free_of(ml)) {
unlink_free_chunk(ml); unlink_free_chunk(ml);