diff options
| -rw-r--r-- | src/delta-apply.c | 13 | ||||
| -rw-r--r-- | src/delta-apply.h | 17 |
2 files changed, 30 insertions, 0 deletions
diff --git a/src/delta-apply.c b/src/delta-apply.c index 815ca8f16..85e2ef88f 100644 --- a/src/delta-apply.c +++ b/src/delta-apply.c @@ -36,6 +36,19 @@ static int hdr_sz( return 0; } +int git__delta_read_header( + const unsigned char *delta, + size_t delta_len, + size_t *base_sz, + size_t *res_sz) +{ + const unsigned char *delta_end = delta + delta_len; + if ((hdr_sz(base_sz, &delta, delta_end) < 0) || + (hdr_sz(res_sz, &delta, delta_end) < 0)) + return -1; + return 0; +} + int git__delta_apply( git_rawobj *out, const unsigned char *base, diff --git a/src/delta-apply.h b/src/delta-apply.h index 66fa76d43..9aea4ac9f 100644 --- a/src/delta-apply.h +++ b/src/delta-apply.h @@ -30,4 +30,21 @@ extern int git__delta_apply( const unsigned char *delta, size_t delta_len); +/** + * Read the header of a git binary delta. + * + * @param delta the delta to execute copy/insert instructions from. + * @param delta_len total number of bytes in the delta. + * @param base_sz pointer to store the base size field. + * @param res_sz pointer to store the result size field. + * @return + * - 0 on a successful decoding the header. + * - GIT_ERROR if the delta is corrupt. + */ +extern int git__delta_read_header( + const unsigned char *delta, + size_t delta_len, + size_t *base_sz, + size_t *res_sz); + #endif |