diff options
author | Petr Mrázek <peterix@gmail.com> | 2016-04-10 15:53:05 +0200 |
---|---|---|
committer | Petr Mrázek <peterix@gmail.com> | 2016-05-01 00:00:14 +0200 |
commit | b6d455a02bd338e9dc0faa09d4d8177ecd8d569a (patch) | |
tree | 41982bca1ede50049f2f8c7109dd18edeefde6d0 /depends/xz-embedded/src/xz_crc32.c | |
parent | 47e37635f50c09b4f9a9ee7699e3120bab3e4088 (diff) | |
download | PrismLauncher-b6d455a02bd338e9dc0faa09d4d8177ecd8d569a.tar.gz PrismLauncher-b6d455a02bd338e9dc0faa09d4d8177ecd8d569a.tar.bz2 PrismLauncher-b6d455a02bd338e9dc0faa09d4d8177ecd8d569a.zip |
NOISSUE reorganize and document libraries
Diffstat (limited to 'depends/xz-embedded/src/xz_crc32.c')
-rw-r--r-- | depends/xz-embedded/src/xz_crc32.c | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/depends/xz-embedded/src/xz_crc32.c b/depends/xz-embedded/src/xz_crc32.c deleted file mode 100644 index c412662b..00000000 --- a/depends/xz-embedded/src/xz_crc32.c +++ /dev/null @@ -1,61 +0,0 @@ -/* - * CRC32 using the polynomial from IEEE-802.3 - * - * Authors: Lasse Collin <lasse.collin@tukaani.org> - * Igor Pavlov <http://7-zip.org/> - * - * This file has been put into the public domain. - * You can do whatever you want with this file. - */ - -/* - * This is not the fastest implementation, but it is pretty compact. - * The fastest versions of xz_crc32() on modern CPUs without hardware - * accelerated CRC instruction are 3-5 times as fast as this version, - * but they are bigger and use more memory for the lookup table. - */ - -#include "xz_private.h" - -/* - * STATIC_RW_DATA is used in the pre-boot environment on some architectures. - * See <linux/decompress/mm.h> for details. - */ -#ifndef STATIC_RW_DATA -#define STATIC_RW_DATA static -#endif - -STATIC_RW_DATA uint32_t xz_crc32_table[256]; - -XZ_EXTERN void xz_crc32_init(void) -{ - const uint32_t poly = 0xEDB88320; - - uint32_t i; - uint32_t j; - uint32_t r; - - for (i = 0; i < 256; ++i) - { - r = i; - for (j = 0; j < 8; ++j) - r = (r >> 1) ^ (poly & ~((r & 1) - 1)); - - xz_crc32_table[i] = r; - } - - return; -} - -XZ_EXTERN uint32_t xz_crc32(const uint8_t *buf, size_t size, uint32_t crc) -{ - crc = ~crc; - - while (size != 0) - { - crc = xz_crc32_table[*buf++ ^ (crc & 0xFF)] ^ (crc >> 8); - --size; - } - - return ~crc; -} |