Commit c8ed837d authored Feb 27, 2008 by marcin.slusarz@gmail.com Committed by Jan Kara Apr 17, 2008

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>

parent 34f953dd

fs/udf/crc.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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);

fs/udf/udfdecl.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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);