{
dTHX;
Malloc_t ptr;
-#if defined(DEBUGGING) || defined(HAS_64K_LIMIT) || defined(PERL_TRACK_MEMPOOL)
- const MEM_SIZE total_size = size * count
-#ifdef PERL_TRACK_MEMPOOL
- + sTHX
-#endif
- ;
-#endif
+ MEM_SIZE total_size = 0;
+ /* Even though calloc() for zero bytes is strange, be robust. */
+ if (size && (count <= MEM_SIZE_MAX / size))
+ total_size = size * count;
+ else
+ Perl_croak_nocontext(PL_memory_wrap);
+#ifdef PERL_TRACK_MEMPOOL
+ if (sTHX <= MEM_SIZE_MAX - (MEM_SIZE)total_size)
+ total_size += sTHX;
+ else
+ Perl_croak_nocontext(PL_memory_wrap);
+#endif
#ifdef HAS_64K_LIMIT
if (total_size > 0xffff) {
PerlIO_printf(Perl_error_log,
#ifdef PERL_TRACK_MEMPOOL
/* Have to use malloc() because we've added some space for our tracking
header. */
- ptr = (Malloc_t)PerlMem_malloc(total_size);
+ /* malloc(0) is non-portable. */
+ ptr = (Malloc_t)PerlMem_malloc(total_size ? total_size : 1);
#else
/* Use calloc() because it might save a memset() if the memory is fresh
and clean from the OS. */
- ptr = (Malloc_t)PerlMem_calloc(count, size);
+ if (count && size)
+ ptr = (Malloc_t)PerlMem_calloc(count, size);
+ else /* calloc(0) is non-portable. */
+ ptr = (Malloc_t)PerlMem_calloc(count ? count : 1, size ? size : 1);
#endif
PERL_ALLOC_CHECK(ptr);
DEBUG_m(PerlIO_printf(Perl_debug_log, "0x%"UVxf": (%05ld) calloc %ld x %ld bytes\n",PTR2UV(ptr),(long)PL_an++,(long)count,(long)total_size));
bigend -= lend - little;
OUTER:
while (big <= bigend) {
- if (*big++ != first)
- goto OUTER;
- for (x=big,s=little; s < lend; x++,s++) {
- if (*s != *x)
- goto OUTER;
+ if (*big++ == first) {
+ for (x=big,s=little; s < lend; x++,s++) {
+ if (*s != *x)
+ goto OUTER;
+ }
+ return (char*)(big-1);
}
- return (char*)(big-1);
}
}
return NULL;