c775931fb614bc303bdc649985f135c3.c

/* CRCTABLE 1.0  Public Domain by Celso Minnitti, Jr  Feb-06-94     */
/* This program will generate the crc16_table and CRC32_table       */
/* that are used by CMCRC.ASM                                       */

#include <stdio.h>
#define CRC32_POLYNOMIAL 0xEDB88320
#define CRC16_POLYNOMIAL 0xA001

void main()
{
    unsigned long crc32Table[256];
    unsigned int crc16Table[256];
    unsigned int crc;
    unsigned long crc32;
    int i, j;

    printf("CRCTABLE 1.0  Public Domain by Celso Minnitti, Jr  Feb-06-94\n\n");

    for (i = 0; i < 256; i++) {
        crc = i;
        for (j = 8; j > 0; j--) {
            if (crc & 1)
                crc = (crc >> 1) ^ CRC16_POLYNOMIAL;
            else
                crc >>= 1;
        }
        crc16Table[i] = crc;
    }

    printf("\ncrc16_table\tlabel\tword");
    for (i = 0; i < 256; i++) {
        if (!(i%32) && i) printf("\n; %Xh", i);
        if (!(i%8)) printf("\n\tdw ");
        if (i%8 != 7) printf("0%04Xh, ", crc16Table[i]);
        else
            printf("0%04Xh", crc16Table[i]);
    }
    printf("\n");

    for (i = 0; i < 256; i++) {
        crc32 = i;
        for (j = 8; j > 0; j--) {
            if (crc32 & 1)
                crc32 = (crc32 >> 1) ^ CRC32_POLYNOMIAL;
            else
                crc32 >>= 1;
        }
        crc32Table[i] = crc32;
    }

    printf("\ncrc32_table\tlabel\tdword");
    for (i = 0; i < 256; i++) {
        if (!(i%16) && i) printf("\n; %Xh", i);
        if (!(i%4)) printf("\n\tdd ");
        if (i%4 != 3) printf("0%08lXh, ", crc32Table[i]);
        else
            printf("0%08lXh", crc32Table[i]);
    }
}