/* handling of delta buffers */
extern void *diff_delta(void *from_buf, unsigned long from_size,
void *to_buf, unsigned long to_size,
- unsigned long *delta_size, unsigned long max_size,
- void **from_index);
+ unsigned long *delta_size, unsigned long max_size);
extern void *patch_delta(void *src_buf, unsigned long src_size,
void *delta_buf, unsigned long delta_size,
unsigned long *dst_size);
* This must be called twice on the delta data buffer, first to get the
* expected reference buffer size, and again to get the result buffer size.
*/
-static inline unsigned long get_delta_hdr_size(const unsigned char **datap)
+static inline unsigned long get_delta_hdr_size(const unsigned char **datap,
+ const unsigned char *top)
{
const unsigned char *data = *datap;
unsigned char cmd;
cmd = *data++;
size |= (cmd & ~0x80) << i;
i += 7;
- } while (cmd & 0x80);
+ } while (cmd & 0x80 && data < top);
*datap = data;
return size;
}