diff options
| author | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-09-18 16:04:24 +0200 |
|---|---|---|
| committer | David Oberhollenzer <david.oberhollenzer@sigma-star.at> | 2022-09-20 08:47:02 +0200 |
| commit | 56edfefb9718f72bd45093e0efd76bd88645fa89 (patch) | |
| tree | 44868fd03fdfe1977cfb6275c60703b972130726 /include | |
| parent | 310d0f23da22435be13864c93364359f0cb7f443 (diff) | |
block writer: move block comaprison to utility function
Slightly modify the byte-for-byte comparison function to compare an
arbitrary range in a file and move it to libutil. Instead of calling
it for each block in the block writer, simply let it check an entire
range in the block writer and compute the range position/size of the
reference ahead, before looking for potential matches.
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'include')
| -rw-r--r-- | include/util/util.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/util/util.h b/include/util/util.h index 6e34a82..0161c2b 100644 --- a/include/util/util.h +++ b/include/util/util.h @@ -69,4 +69,12 @@ SQFS_INTERNAL bool is_filename_sane(const char *name, bool check_os_specific); */ SQFS_INTERNAL sqfs_u32 get_source_date_epoch(void); +/* + Check if two regions in a file are equal using a scratch buffer to load the + data into for comparision. Returns 0 if equal, > 0 if not, < 0 if error. + */ +SQFS_INTERNAL int check_file_range_equal(sqfs_file_t *file, void *scratch, + size_t scratch_size, sqfs_u64 loc_a, + sqfs_u64 loc_b, sqfs_u64 size); + #endif /* SQFS_UTIL_H */ |