+/* Attempts to resize OLD_BLOCK to NEW_SIZE bytes, possibly
+ moving it in the process.
+ If successful, returns the new block; on failure, returns a
+ null pointer.
+ A call with null OLD_BLOCK is equivalent to malloc(NEW_SIZE).
+ A call with zero NEW_SIZE is equivalent to free(OLD_BLOCK). */
+void *
+realloc (void *old_block, size_t new_size)
+{
+ if (new_size == 0)
+ {
+ free (old_block);
+ return NULL;
+ }
+ else