#include <stdlib.h>
#include <string.h>
#include <limits.h>
+#include "delta.h"
#include "count-delta.h"
-static unsigned long get_hdr_size(const unsigned char **datap)
-{
- const unsigned char *data = *datap;
- unsigned long size;
- unsigned char cmd;
- int i;
- size = i = 0;
- cmd = *data++;
- while (cmd) {
- if (cmd & 1)
- size |= *data++ << i;
- i += 8;
- cmd >>= 1;
- }
- *datap = data;
- return size;
-}
-
/*
* NOTE. We do not _interpret_ delta fully. As an approximation, we
* just count the number of bytes that are copied from the source, and
unsigned char cmd;
unsigned long src_size, dst_size, out;
- /* the smallest delta size possible is 6 bytes */
- if (delta_size < 6)
+ if (delta_size < DELTA_SIZE_MIN)
return -1;
data = delta_buf;
top = delta_buf + delta_size;
- src_size = get_hdr_size(&data);
- dst_size = get_hdr_size(&data);
+ src_size = get_delta_hdr_size(&data);
+ dst_size = get_delta_hdr_size(&data);
added_literal = copied_from_source = out = 0;
while (data < top) {