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https://github.com/hanwckf/immortalwrt-mt798x.git
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tools: add crc32sum
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hanwckf
parent
6c1ebe4474
commit
903e21f651
@ -26,6 +26,7 @@ tools-y += e2fsprogs fakeroot findutils firmware-utils flex gengetopt
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tools-y += libressl libtool lzma m4 make-ext4fs missing-macros mkimage
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tools-y += mklibs mm-macros mtd-utils mtools ninja padjffs2 patch-image
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tools-y += patchelf pkgconf quilt squashfskit4 sstrip zip zlib zstd
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tools-y += crc32sum
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tools-$(BUILD_B43_TOOLS) += b43-tools
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tools-$(BUILD_ISL) += isl
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tools-$(BUILD_TOOLCHAIN) += expat gmp libelf mpc mpfr
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23
tools/crc32sum/Makefile
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23
tools/crc32sum/Makefile
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@ -0,0 +1,23 @@
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#
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# Copyright (C) 2021 MediaTek Inc. All rights reserved.
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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include $(TOPDIR)/rules.mk
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PKG_NAME:=crc32sum
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PKG_VERSION:=1.0
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include $(INCLUDE_DIR)/host-build.mk
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define Host/Prepare
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mkdir -p $(HOST_BUILD_DIR)
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$(CP) -a ./src/* $(HOST_BUILD_DIR)/
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endef
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define Host/Install
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$(INSTALL_BIN) $(HOST_BUILD_DIR)/crc32sum $(STAGING_DIR_HOST)/bin/
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endef
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$(eval $(call HostBuild))
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18
tools/crc32sum/src/Makefile
Normal file
18
tools/crc32sum/src/Makefile
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@ -0,0 +1,18 @@
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#
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# Copyright (C) 2021 MediaTek Inc. All rights reserved.
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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all: crc32sum
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crc32sum: crc32sum.c
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$(CC) $(CFLAGS) -O2 -ggdb -MD -o $@ $< $(LDFLAGS)
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clean:
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rm -f crc32sum crc32sum.d
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.PHONY: clean
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-include crc32sum.d
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282
tools/crc32sum/src/crc32sum.c
Normal file
282
tools/crc32sum/src/crc32sum.c
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@ -0,0 +1,282 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2021 MediaTek Inc. All Rights Reserved.
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*
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* Author: Weijie Gao <weijie.gao@mediatek.com>
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdbool.h>
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#include <string.h>
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#include <ctype.h>
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#include <errno.h>
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#include <getopt.h>
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#ifdef _WIN32
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#include <io.h>
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#include <fcntl.h>
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#define SET_BINARY_MODE(_f) _setmode(_fileno(_f, O_BINARY)
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#else
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#define SET_BINARY_MODE(_f) ((void)0)
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#endif
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#define CRC32_LE_POLY_DEFAULT 0xedb88320
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#define CRC32_BE_POLY_DEFAULT 0x04c11db7
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#define CRC32_TABLE_ITEMS 256
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static uint32_t crc32_le_calc(uint32_t crc, const uint8_t *data, size_t length,
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const uint32_t *crc_table)
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{
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while (length--)
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crc = crc_table[(uint8_t)(crc ^ *data++)] ^ (crc >> 8);
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return crc;
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}
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static void crc32_le_init(uint32_t *crc_table, uint32_t poly)
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{
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uint32_t i, j, v;
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for (i = 0; i < CRC32_TABLE_ITEMS; i++) {
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v = i;
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for (j = 0; j < 8; j++)
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v = (v >> 1) ^ ((v & 1) ? poly : 0);
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crc_table[i] = v;
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}
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}
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static uint32_t crc32_be_calc(uint32_t crc, const uint8_t *data, size_t length,
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const uint32_t *crc_table)
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{
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while (length--)
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crc = crc_table[(uint8_t)((crc >> 24) ^ *data++)] ^ (crc << 8);
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return crc;
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}
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static void crc32_be_init(uint32_t *crc_table, uint32_t poly)
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{
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uint32_t i, j, v;
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for (i = 0; i < CRC32_TABLE_ITEMS; i++) {
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v = i << 24;
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for (j = 0; j < 8; j++)
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v = (v << 1) ^ ((v & (1 << 31)) ? poly : 0);
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crc_table[i] = v;
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}
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}
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struct crc_funcs {
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uint32_t poly;
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void (*init)(uint32_t *crc_table, uint32_t poly);
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uint32_t (*calc)(uint32_t crc, const uint8_t *data, size_t length,
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const uint32_t *crc_table);
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};
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static const struct crc_funcs crc32_le = {
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.poly = CRC32_LE_POLY_DEFAULT,
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.init = crc32_le_init,
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.calc = crc32_le_calc,
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};
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static const struct crc_funcs crc32_be = {
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.poly = CRC32_BE_POLY_DEFAULT,
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.init = crc32_be_init,
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.calc = crc32_be_calc,
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};
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static const struct crc_funcs *crc32_algo = &crc32_le;
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static uint32_t crc32_poly;
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static uint32_t crc32_val;
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static const char *input_file;
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static bool output_decimal;
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static bool no_comp;
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static void err(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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fprintf(stderr, "Error: ");
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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}
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static void usage(FILE *con, const char *progname, int exitcode)
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{
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const char *prog;
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size_t len;
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len = strlen(progname);
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prog = progname + len - 1;
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while (prog > progname) {
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if (*prog == '\\' || *prog == '/') {
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prog++;
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break;
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}
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prog--;
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}
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fprintf(con, "CRC32 checksum tool\n");
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fprintf(con, "\n");
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fprintf(con, "Usage: %s [options] <input_file>\n", prog);
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fprintf(con, "\n");
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fprintf(con, "Options:\n");
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fprintf(con, "\t-h display help message\n");
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fprintf(con, "\t-i <val> crc value for incremental calculation\n");
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fprintf(con, "\t (default is 0)\n");
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fprintf(con, "\t-p <val> polynomial for calculation\n");
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fprintf(con, "\t (default is 0x%08x for LE, 0x%08x for BE)\n",
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crc32_le.poly, crc32_be.poly);
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fprintf(con, "\t-b use big-endian mode\n");
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fprintf(con, "\t-n do not use one's complement\n");
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fprintf(con, "\t-d use decimal output\n");
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fprintf(con, "\n");
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exit(exitcode);
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}
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static int parse_args(int argc, char *argv[])
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{
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int opt;
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static const char *optstring = "i:p:bndh";
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opterr = 0;
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while ((opt = getopt(argc, argv, optstring)) >= 0) {
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switch (opt) {
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case 'i':
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if (!isxdigit(optarg[0])) {
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err("Invalid crc value - %s\n", optarg);
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return -EINVAL;
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}
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crc32_val = strtoul(optarg, NULL, 0);
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break;
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case 'p':
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if (!isxdigit(optarg[0])) {
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err("Invalid polynomial value - %s\n", optarg);
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return -EINVAL;
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}
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crc32_poly = strtoul(optarg, NULL, 0);
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break;
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case 'b':
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crc32_algo = &crc32_be;
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break;
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case 'n':
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no_comp = true;
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break;
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case 'd':
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output_decimal = true;
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break;
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case 'h':
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usage(stdout, argv[0], 0);
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break;
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default:
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usage(stderr, argv[0], EXIT_FAILURE);
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}
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}
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if (!crc32_poly)
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crc32_poly = crc32_algo->poly;
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if (optind >= argc)
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input_file = "-";
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else
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input_file = argv[optind];
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if (!input_file[0]) {
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err("Input file must not be empty\n");
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return -EINVAL;
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}
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return 0;
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}
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static int crc32_calc(void)
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{
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uint32_t crc_table[CRC32_TABLE_ITEMS];
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bool using_stdin = false;
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uint8_t buf[4096];
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size_t size;
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int ret, i;
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FILE *f;
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if (!strcmp(input_file, "-")) {
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SET_BINARY_MODE(stdin);
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using_stdin = true;
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f = stdin;
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} else {
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f = fopen(input_file, "rb");
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}
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if (!f) {
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err("Failed to open file '%s'\n", input_file);
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return -EINVAL;
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}
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crc32_algo->init(crc_table, crc32_poly);
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if (!no_comp)
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crc32_val ^= 0xffffffff;
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do {
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size = fread(buf, 1, sizeof(buf), f);
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if (size) {
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crc32_val = crc32_algo->calc(crc32_val, buf, size,
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crc_table);
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}
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if (size < sizeof(buf)) {
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ret = ferror(f);
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if (!ret && feof(f))
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break;
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err("Error while reading file: %d\n", ret);
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break;
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}
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} while (true);
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if (!using_stdin)
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fclose(f);
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if (ret)
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return ret;
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if (!no_comp)
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crc32_val ^= 0xffffffff;
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if (output_decimal)
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printf("%u\n", crc32_val);
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else
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printf("%08x\n", crc32_val);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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if (parse_args(argc, argv))
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return 1;
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return crc32_calc();
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}
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