vde-2/utils/realloc.c

   1
   2 #include <stdlib.h>
   3 #undef realloc
   4
   5 void * rpl_realloc(void *ptr, size_t size)
   6 {
   7         void *mem;
   8         if (size <= 0){ /* For zero or less bytes, free the original memory */
   9                 if (ptr) free(ptr);
  10                 return NULL;
  11         }
  12         else if (!ptr) /* Allow reallocation of a NULL pointer.  */
  13                 return malloc(size);
  14         else { /* Allocate a new block, copy and free the old block.  */
  15                 mem=malloc(size);
  16                 if (mem) {
  17                         memcpy (mem, ptr, size);
  18                         free(ptr);
  19                 }
  20                 /* Note that the contents of PTR are not damaged if there is
  21                    insufficient memory to realloc.  */
  22                 return mem;
  23         }
  24 }
  25