diff options
| author | marcin.slusarz@gmail.com <marcin.slusarz@gmail.com> | 2008-02-27 22:38:38 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2008-04-17 14:22:24 +0200 |
| commit | c8ed837d371c24b678182a30e9f0b1f61dee212c (patch) | |
| tree | e55b2be4c2445f0f9eb957867a3914cfdd9d1378 | |
| parent | 34f953ddfd15da8feb5b8383c93c35dc57202b66 (diff) | |
udf: constify crc
- constify internal crc table
- mark udf_crc "in" parameter as const
Signed-off-by: Marcin Slusarz <marcin.slusarz@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
| -rw-r--r-- | fs/udf/crc.c | 4 | ||||
| -rw-r--r-- | fs/udf/udfdecl.h | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/fs/udf/crc.c b/fs/udf/crc.c index b1661296e786..f178c63686e0 100644 --- a/fs/udf/crc.c +++ b/fs/udf/crc.c @@ -23,7 +23,7 @@ #include "udfdecl.h" -static uint16_t crc_table[256] = { +static const uint16_t crc_table[256] = { 0x0000U, 0x1021U, 0x2042U, 0x3063U, 0x4084U, 0x50a5U, 0x60c6U, 0x70e7U, 0x8108U, 0x9129U, 0xa14aU, 0xb16bU, 0xc18cU, 0xd1adU, 0xe1ceU, 0xf1efU, 0x1231U, 0x0210U, 0x3273U, 0x2252U, 0x52b5U, 0x4294U, 0x72f7U, 0x62d6U, @@ -79,7 +79,7 @@ static uint16_t crc_table[256] = { * July 21, 1997 - Andrew E. Mileski * Adapted from OSTA-UDF(tm) 1.50 standard. */ -uint16_t udf_crc(uint8_t *data, uint32_t size, uint16_t crc) +uint16_t udf_crc(const uint8_t *data, uint32_t size, uint16_t crc) { while (size--) crc = crc_table[(crc >> 8 ^ *(data++)) & 0xffU] ^ (crc << 8); diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h index 2310b5c8fd8b..26bc9c237cb7 100644 --- a/fs/udf/udfdecl.h +++ b/fs/udf/udfdecl.h @@ -210,7 +210,7 @@ extern long_ad *udf_get_filelongad(uint8_t *, int, uint32_t *, int); extern short_ad *udf_get_fileshortad(uint8_t *, int, uint32_t *, int); /* crc.c */ -extern uint16_t udf_crc(uint8_t *, uint32_t, uint16_t); +extern uint16_t udf_crc(const uint8_t *, uint32_t, uint16_t); /* udftime.c */ extern time_t *udf_stamp_to_time(time_t *, long *, kernel_timestamp); |