linux-arkmicro/tools/crc/crc.cpp

// crc.c : 定义控制台应用程序的入口点。
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
static const unsigned int crc32_table[]=
{
0x00000000,0x77073096,0xee0e612c,0x990951ba,
0x076dc419,0x706af48f,0xe963a535,0x9e6495a3,
0x0edb8832,0x79dcb8a4,0xe0d5e91e,0x97d2d988,
0x09b64c2b,0x7eb17cbd,0xe7b82d07,0x90bf1d91,
0x1db71064,0x6ab020f2,0xf3b97148,0x84be41de,
0x1adad47d,0x6ddde4eb,0xf4d4b551,0x83d385c7,
0x136c9856,0x646ba8c0,0xfd62f97a,0x8a65c9ec,
0x14015c4f,0x63066cd9,0xfa0f3d63,0x8d080df5,
0x3b6e20c8,0x4c69105e,0xd56041e4,0xa2677172,
0x3c03e4d1,0x4b04d447,0xd20d85fd,0xa50ab56b,
0x35b5a8fa,0x42b2986c,0xdbbbc9d6,0xacbcf940,
0x32d86ce3,0x45df5c75,0xdcd60dcf,0xabd13d59,
0x26d930ac,0x51de003a,0xc8d75180,0xbfd06116,
0x21b4f4b5,0x56b3c423,0xcfba9599,0xb8bda50f,
0x2802b89e,0x5f058808,0xc60cd9b2,0xb10be924,
0x2f6f7c87,0x58684c11,0xc1611dab,0xb6662d3d,
0x76dc4190,0x01db7106,0x98d220bc,0xefd5102a,
0x71b18589,0x06b6b51f,0x9fbfe4a5,0xe8b8d433,
0x7807c9a2,0x0f00f934,0x9609a88e,0xe10e9818,
0x7f6a0dbb,0x086d3d2d,0x91646c97,0xe6635c01,
0x6b6b51f4,0x1c6c6162,0x856530d8,0xf262004e,
0x6c0695ed,0x1b01a57b,0x8208f4c1,0xf50fc457,
0x65b0d9c6,0x12b7e950,0x8bbeb8ea,0xfcb9887c,
0x62dd1ddf,0x15da2d49,0x8cd37cf3,0xfbd44c65,
0x4db26158,0x3ab551ce,0xa3bc0074,0xd4bb30e2,
0x4adfa541,0x3dd895d7,0xa4d1c46d,0xd3d6f4fb,
0x4369e96a,0x346ed9fc,0xad678846,0xda60b8d0,
0x44042d73,0x33031de5,0xaa0a4c5f,0xdd0d7cc9,
0x5005713c,0x270241aa,0xbe0b1010,0xc90c2086,
0x5768b525,0x206f85b3,0xb966d409,0xce61e49f,
0x5edef90e,0x29d9c998,0xb0d09822,0xc7d7a8b4,
0x59b33d17,0x2eb40d81,0xb7bd5c3b,0xc0ba6cad,
0xedb88320,0x9abfb3b6,0x03b6e20c,0x74b1d29a,
0xead54739,0x9dd277af,0x04db2615,0x73dc1683,
0xe3630b12,0x94643b84,0x0d6d6a3e,0x7a6a5aa8,
0xe40ecf0b,0x9309ff9d,0x0a00ae27,0x7d079eb1,
0xf00f9344,0x8708a3d2,0x1e01f268,0x6906c2fe,
0xf762575d,0x806567cb,0x196c3671,0x6e6b06e7,
0xfed41b76,0x89d32be0,0x10da7a5a,0x67dd4acc,
0xf9b9df6f,0x8ebeeff9,0x17b7be43,0x60b08ed5,
0xd6d6a3e8,0xa1d1937e,0x38d8c2c4,0x4fdff252,
0xd1bb67f1,0xa6bc5767,0x3fb506dd,0x48b2364b,
0xd80d2bda,0xaf0a1b4c,0x36034af6,0x41047a60,
0xdf60efc3,0xa867df55,0x316e8eef,0x4669be79,
0xcb61b38c,0xbc66831a,0x256fd2a0,0x5268e236,
0xcc0c7795,0xbb0b4703,0x220216b9,0x5505262f,
0xc5ba3bbe,0xb2bd0b28,0x2bb45a92,0x5cb36a04,
0xc2d7ffa7,0xb5d0cf31,0x2cd99e8b,0x5bdeae1d,
0x9b64c2b0,0xec63f226,0x756aa39c,0x026d930a,
0x9c0906a9,0xeb0e363f,0x72076785,0x05005713,
0x95bf4a82,0xe2b87a14,0x7bb12bae,0x0cb61b38,
0x92d28e9b,0xe5d5be0d,0x7cdcefb7,0x0bdbdf21,
0x86d3d2d4,0xf1d4e242,0x68ddb3f8,0x1fda836e,
0x81be16cd,0xf6b9265b,0x6fb077e1,0x18b74777,
0x88085ae6,0xff0f6a70,0x66063bca,0x11010b5c,
0x8f659eff,0xf862ae69,0x616bffd3,0x166ccf45,
0xa00ae278,0xd70dd2ee,0x4e048354,0x3903b3c2,
0xa7672661,0xd06016f7,0x4969474d,0x3e6e77db,
0xaed16a4a,0xd9d65adc,0x40df0b66,0x37d83bf0,
0xa9bcae53,0xdebb9ec5,0x47b2cf7f,0x30b5ffe9,
0xbdbdf21c,0xcabac28a,0x53b39330,0x24b4a3a6,
0xbad03605,0xcdd70693,0x54de5729,0x23d967bf,
0xb3667a2e,0xc4614ab8,0x5d681b02,0x2a6f2b94,
0xb40bbe37,0xc30c8ea1,0x5a05df1b,0x2d02ef8d
};
unsigned int
xcrc32(const unsigned char *buf, int len, unsigned int init)
{
	unsigned int crc = init;
	while (len--)
	{
		//crc = (crc << 8) ^ crc32_table[((crc >> 24) ^ *buf) & 255];
		crc = crc32_table[(crc ^ (*buf)) & 255] ^ (crc >> 8);
		buf++;
	}
	return crc;
}
#define SYS_INFO_OFFSET		0
typedef struct SYS_INFO {
	unsigned int  uboot_crc;
	unsigned int  uboot_env_crc;
	unsigned int  zImage_crc;
	unsigned int  rootfs_crc;
	unsigned int  arkdata_crc;
	unsigned int  reserve[11];
}SYS_INFO;
#define DO_CRC(x) crc = tab[(crc ^ (x)) & 255] ^ (crc >> 8)
# define cpu_to_le32(x)		(x)
# define le32_to_cpu(x)		(x)
unsigned int crc32_no_comp(unsigned int crc, const unsigned char *buf, unsigned int len)
{
	const unsigned int *tab = crc32_table;
	const unsigned int *b =(const unsigned int *)buf;
	size_t rem_len;
	crc = cpu_to_le32(crc);
	/* Align it */
	if (((long)b) & 3 && len) {
		unsigned char *p = (unsigned char *)b;
	do {
		DO_CRC(*p++);
	} while ((--len) && ((long)p)&3);
		b = (unsigned int *)p;
	}
	rem_len = len & 3;
	len = len >> 2;
	for (--b; len; --len) {
	/* load data 32 bits wide, xor data 32 bits wide. */
	crc ^= *++b; /* use pre increment for speed */
	DO_CRC(0);
	DO_CRC(0);
	DO_CRC(0);
	DO_CRC(0);
	}
	len = rem_len;
	/* And the last few bytes */
	if (len) {
	unsigned char *p = (unsigned char *)(b + 1) - 1;
	do {
		DO_CRC(*++p); /* use pre increment for speed */
	} while (--len);
	}
	return le32_to_cpu(crc);
}
unsigned int  crc32 (unsigned int crc, const unsigned char *p, unsigned int len)
{
	return crc32_no_comp(crc ^ 0xffffffffL, p, len) ^ 0xffffffffL;
}
int main(int argc, char *argv[])
{
//	SYS_INFO sys_info;
	unsigned int checksum = 0;
	FILE *fp1;
	FILE *fp = fopen(argv[1], "rb+");
	if (fp != NULL) {
		fseek(fp, 0, SEEK_END);
		long int filesize = ftell(fp);
		fseek(fp, 0, SEEK_SET);
		unsigned char *buf = (unsigned char*)malloc(filesize);
		if (buf) {
			if (fread(buf, 1, filesize, fp) != filesize) {
				printf("read file fail.\n");
				fclose(fp);
				return 0;
			}
//			memset(&sys_info, 0, sizeof(sys_info));
			checksum = crc32(0, buf, filesize);
			fclose(fp);
		}
	}
	printf(">>>>>>>>>>>>>checksum = 0x%x\n",checksum);
	fp1 = fopen("crcdata.bin", "rb+");
	if(fp1 != NULL)
	{
		fseek(fp1, 0, SEEK_END);
		fwrite(&checksum, sizeof(unsigned int), 1, fp1);
		fclose(fp1);
	}
	return 0;
}