diff options
Diffstat (limited to 'patch-delta.c')
| -rw-r--r-- | patch-delta.c | 28 |
1 files changed, 14 insertions, 14 deletions
diff --git a/patch-delta.c b/patch-delta.c index a8d75ee1c8..b68dd13c63 100644 --- a/patch-delta.c +++ b/patch-delta.c @@ -22,33 +22,33 @@ void *patch_delta(void *src_buf, unsigned long src_size, unsigned long size; int i; - /* the smallest delta size possible is 6 bytes */ - if (delta_size < 6) + /* the smallest delta size possible is 4 bytes */ + if (delta_size < 4) return NULL; data = delta_buf; top = delta_buf + delta_size; /* make sure the orig file size matches what we expect */ - size = i = 0; cmd = *data++; - while (cmd) { - if (cmd & 1) - size |= *data++ << i; - i += 8; - cmd >>= 1; + size = cmd & ~0x80; + i = 7; + while (cmd & 0x80) { + cmd = *data++; + size |= (cmd & ~0x80) << i; + i += 7; } if (size != src_size) return NULL; /* now the result size */ - size = i = 0; cmd = *data++; - while (cmd) { - if (cmd & 1) - size |= *data++ << i; - i += 8; - cmd >>= 1; + size = cmd & ~0x80; + i = 7; + while (cmd & 0x80) { + cmd = *data++; + size |= (cmd & ~0x80) << i; + i += 7; } dst_buf = malloc(size); if (!dst_buf) |