From f9221e2cf5049805d9151b3db6a5eef07b1cc92e Mon Sep 17 00:00:00 2001 From: Taylor Blau Date: Wed, 23 Jun 2021 14:39:07 -0400 Subject: csum-file: introduce checksum_valid() Introduce a new function which checks the validity of a file's trailing checksum. This is similar to hashfd_check(), but different since it is intended to be used by callers who aren't writing the same data (like `git index-pack --verify`), but who instead want to validate the integrity of data that they are reading. Rewrite the first of two callers which could benefit from this new function in pack-check.c. Subsequent callers will be added in the following patches. Helped-by: Jeff King Signed-off-by: Jeff King Signed-off-by: Taylor Blau Signed-off-by: Junio C Hamano --- csum-file.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'csum-file.h') diff --git a/csum-file.h b/csum-file.h index e54d53d1d0..87e3879f1c 100644 --- a/csum-file.h +++ b/csum-file.h @@ -42,6 +42,9 @@ void hashflush(struct hashfile *f); void crc32_begin(struct hashfile *); uint32_t crc32_end(struct hashfile *); +/* Verify checksum validity while reading. Returns non-zero on success. */ +int hashfile_checksum_valid(const unsigned char *data, size_t len); + /* * Returns the total number of bytes fed to the hashfile so far (including ones * that have not been written out to the descriptor yet). -- cgit v1.2.3