[greatlrd] 22197: fixing malloc and realloc so it return right value do not mix the doc over malloc and realloc. Thanks filip <filip2307> malloc(0) -> valid buffer <GreatLord> then I revert that change <filip2307> realloc(<non-null pointer>, 0) -> NULL <filip2307> realloc(NULL, 0) -> valid buffer

Author: greatlrd
Date: Sat Jun  3 21:40:23 2006
New Revision: 22197

URL: http://svn.reactos.ru/svn/reactos?rev=22197&view=rev
Log:
fixing malloc and realloc so it return right value 
do not mix the doc over malloc and realloc. Thanks filip
<filip2307> malloc(0) -> valid buffer
<GreatLord> then I revert that change
<filip2307> realloc(<non-null pointer>, 0) -> NULL
<filip2307> realloc(NULL, 0) -> valid buffer

Modified:
    trunk/reactos/lib/crt/stdlib/malloc.c

Modified: trunk/reactos/lib/crt/stdlib/malloc.c
URL:
http://svn.reactos.ru/svn/reactos/trunk/reactos/lib/crt/stdlib/malloc.c?rev…
==============================================================================
--- trunk/reactos/lib/crt/stdlib/malloc.c (original)
+++ trunk/reactos/lib/crt/stdlib/malloc.c Sat Jun  3 21:40:23 2006
@@ -36,12 +36,7 @@
  */
 void* malloc(size_t _size)
 {
-   size_t nSize;
-     
-   if ( _size == 0)
-       return NULL;
-  
-   nSize = ROUND_SIZE(_size);
+   size_t nSize = ROUND_SIZE(_size);
    
    if (nSize<_size) 
        return NULL;     
@@ -65,7 +60,7 @@
    size_t nSize = _nmemb * _size;
    size_t cSize = ROUND_SIZE(nSize);
       
-   if ((_nmemb > ((size_t)-1 / _size)  || (nSize == 0) || (cSize<nSize)) 
+   if ((_nmemb > ((size_t)-1 / _size)  || (cSize<nSize)) 
       return NULL;
                
    return HeapAlloc(hHeap, HEAP_ZERO_MEMORY, cSize );
@@ -78,7 +73,7 @@
 {
    size_t nSize;
        
-   if ( _size == 0)
+   if (( _size == 0) && (_ptr !=NULL)
        return NULL;
    
    nSize = ROUND_SIZE(_size);
@@ -98,10 +93,7 @@
 void* _expand(void* _ptr, size_t _size)
 {
    size_t nSize;
-      
-   if ( _size == 0)
-       return NULL;
-
+         
    nSize = ROUND_SIZE(_size);
    
    if (nSize<_size)