From 86dd9696d3a1acb036d65909d93d73455b8aed3a Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Tue, 19 Feb 2008 14:54:17 +0200 Subject: Revert ubi-tools changes Restore ubi tools to their "original" state, which means to the state they were before I stareted cleaning them up. Instead, create a "new-utils" subdirectory and move my work there. Signed-off-by: Artem Bityutskiy --- ubi-utils/old-tools/src/crc32.c | 83 ----------------------------------------- 1 file changed, 83 deletions(-) delete mode 100644 ubi-utils/old-tools/src/crc32.c (limited to 'ubi-utils/old-tools/src/crc32.c') diff --git a/ubi-utils/old-tools/src/crc32.c b/ubi-utils/old-tools/src/crc32.c deleted file mode 100644 index 666e217..0000000 --- a/ubi-utils/old-tools/src/crc32.c +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Copyright (c) International Business Machines Corp., 2006 - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See - * the GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * Author: Thomas Gleixner - */ - -/* - * CRC32 functions - * - * Can be compiled as seperate object, but is included into the ipl source - * so gcc can inline the functions. We optimize for size so the omission of - * the function frame is helpful. - * - */ - -#include -#include - -/* CRC polynomial */ -#define CRC_POLY 0xEDB88320 - -/** - * init_crc32_table - Initialize crc table - * - * @table: pointer to the CRC table which must be initialized - * - * Create CRC32 table for given polynomial. The table is created with - * the lowest order term in the highest order bit. So the x^32 term - * has to implied in the crc calculation function. - */ -void init_crc32_table(uint32_t *table) -{ - uint32_t crc; - int i, j; - - for (i = 0; i < 256; i++) { - crc = i; - for (j = 8; j > 0; j--) { - if (crc & 1) - crc = (crc >> 1) ^ CRC_POLY; - else - crc >>= 1; - } - table[i] = crc; - } -} - -/** - * clc_crc32 - Calculate CRC32 over a buffer - * - * @table: pointer to the CRC table - * @crc: initial crc value - * @buf: pointer to the buffer - * @len: number of bytes to calc - * - * Returns the updated crc value. - * - * The algorithm resembles a hardware shift register, but calculates 8 - * bit at once. - */ -uint32_t clc_crc32(uint32_t *table, uint32_t crc, void *buf, - int len) -{ - const unsigned char *p = buf; - - while(--len >= 0) - crc = table[(crc ^ *p++) & 0xff] ^ (crc >> 8); - return crc; -} -- cgit v1.2.3