[gdalsnes] 18404: alloc at minimum 16 bytes (spotted by WaxDragon)

alloc at minimum 16 bytes (spotted by WaxDragon)
realloc should free passed mem if new size is 0
Modified: trunk/reactos/lib/crt/stdlib/malloc.c
  _____  

Modified: trunk/reactos/lib/crt/stdlib/malloc.c
--- trunk/reactos/lib/crt/stdlib/malloc.c	2005-10-10 20:18:07 UTC
(rev 18403)
+++ trunk/reactos/lib/crt/stdlib/malloc.c	2005-10-10 22:42:13 UTC
(rev 18404)
@@ -29,6 +29,9 @@

 /* fixme: should have this in common header */
 #define ROUND_UP(a,b) ((a + (b-1)) & ~(b-1))
 
+/* round to 16 bytes + alloc at minimum 16 bytes */
+#define ROUND_SIZE(size) (max(16, ROUND_UP(size, 16)))
+
 extern HANDLE hHeap;
 
 /*
@@ -36,7 +39,7 @@
  */
 void* malloc(size_t _size)
 {
-   return HeapAlloc(hHeap, 0, ROUND_UP(_size, 16));
+   return HeapAlloc(hHeap, 0, ROUND_SIZE(_size));
 }
 
 /*
@@ -52,7 +55,7 @@
  */
 void* calloc(size_t _nmemb, size_t _size)
 {
-   return HeapAlloc(hHeap, HEAP_ZERO_MEMORY, ROUND_UP(_nmemb*_size, 16)
);
+   return HeapAlloc(hHeap, HEAP_ZERO_MEMORY, ROUND_SIZE(_nmemb*_size)
);
 }
 
 /*
@@ -60,9 +63,10 @@
  */
 void* realloc(void* _ptr, size_t _size)
 {
-   if (!_ptr)
-      return HeapAlloc(hHeap, 0, ROUND_UP(_size, 16));
-   return HeapReAlloc(hHeap, 0, _ptr, ROUND_UP(_size, 16));
+   if (!_ptr) return malloc(_size);
+   if (_size) return HeapReAlloc(hHeap, 0, _ptr, ROUND_SIZE(_size));
+   free(_ptr);
+   return NULL;
 }
 
 /*
@@ -70,7 +74,7 @@
  */
 void* _expand(void* _ptr, size_t _size)
 {
-   return HeapReAlloc(hHeap, HEAP_REALLOC_IN_PLACE_ONLY, _ptr,
ROUND_UP(_size, 16));
+   return HeapReAlloc(hHeap, HEAP_REALLOC_IN_PLACE_ONLY, _ptr,
ROUND_SIZE(_size));
 }
 
 /*