/*
 *  REALLOC.C
 *
 *    (c)Copyright 1992-1997 Obvious Implementations Corp.  Redistribution and
 *    use is allowed under the terms of the DICE-LICENSE FILE,
 *    DICE-LICENSE.TXT.
 */

#include <exec/types.h>
#include <exec/memory.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>

#define buf ((long *)vbuf)

void *
realloc(vbuf, bytes)
void *vbuf;
size_t bytes;
{
    void *ptr = NULL;
    int copy;

    if (bytes <= 0 && buf) {
	free(buf);
	return(NULL);
    }
    if (buf) {
	copy = buf[-1] - 8;
	if (bytes <= copy)
	    return(buf);
    }
    ptr = malloc(bytes);
    if (ptr && buf) {
	movmem(buf, ptr, copy);
	free(buf);
    }
    return(ptr);
}