/*
* Library: libcrc
* File: examples/tstcrc.c
* Author: Lammert Bies
*
* This file is licensed under the MIT License as stated below
*
* Copyright (c) 1999-2016 Lammert Bies
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Description
* -----------
* The file tstx_crc.c contains a small sample program which demonstrates the
* use of the functions for calculating the CRC-CCITT, CRC-16 and CRC-32 values
* of data. The program calculates the three different CRC's for a file who's
* name is either provided at the command line, or data typed in right the
* program has started.
*/
#include <inttypes.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "../include/checksum.h"
#define MAX_STRING_SIZE 2048
/*
* int main( int argc, char *argv[] );
*
* The function main() is the entry point of the example program which
* calculates several CRC values from the contents of files, or data from
* stdin.
*/
int main( int argc, char *argv[] ) {
char input_string[MAX_STRING_SIZE];
unsigned char *ptr;
unsigned char *dest;
unsigned char hex_val;
unsigned char prev_byte;
uint16_t crc_16_val;
uint16_t crc_16_modbus_val;
uint16_t crc_ccitt_ffff_val;
uint16_t crc_ccitt_0000_val;
uint16_t crc_ccitt_1d0f_val;
uint16_t crc_dnp_val;
uint16_t crc_sick_val;
uint16_t crc_kermit_val;
uint32_t crc_32_val;
uint16_t low_byte;
uint16_t high_byte;
int a;
int ch;
bool do_ascii;
bool do_hex;
FILE *fp;
do_ascii = false;
do_hex = false;
printf( "\ntstcrc: CRC algorithm sample program\nCopyright (c) 1999-2016 Lammert Bies\n\n" );
if ( argc < 2 ) {
printf( "Usage: tst_crc [-a|-x] file1 ...\n\n" );
printf( " -a Program asks for ASCII input. Following parameters ignored.\n" );
printf( " -x Program asks for hexadecimal input. Following parameters ignored.\n" );
printf( " All other parameters are treated like filenames. The CRC values\n" );
printf( " for each separate file will be calculated.\n" );
exit( 0 );
}
if ( ! strcmp( argv[1], "-a" ) || ! strcmp( argv[1], "-A" ) ) do_ascii = true;
if ( ! strcmp( argv[1], "-x" ) || ! strcmp( argv[1], "-X" ) ) do_hex = true;
if ( do_ascii || do_hex ) {
printf( "Input: " );
fgets( input_string, MAX_STRING_SIZE-1, stdin );
}
if ( do_ascii ) {
ptr = (unsigned char *) input_string;
while ( *ptr && *ptr != '\r' && *ptr != '\n' ) ptr++;
*ptr = 0;
}
if ( do_hex ) {
ptr = (unsigned char *) input_string;
dest = (unsigned char *) input_string;
while( *ptr && *ptr != '\r' && *ptr != '\n' ) {
if ( *ptr >= '0' && *ptr <= '9' ) *dest++ = (unsigned char) ( (*ptr) - '0' );
if ( *ptr >= 'A' && *ptr <= 'F' ) *dest++ = (unsigned char) ( (*ptr) - 'A' + 10 );
if ( *ptr >= 'a' && *ptr <= 'f' ) *dest++ = (unsigned char) ( (*ptr) - 'a' + 10 );
ptr++;
}
* dest = '\x80';
*(dest+1) = '\x80';
}
a = 1;
do {
crc_16_val = 0x0000;
crc_16_modbus_val = 0xffff;
crc_dnp_val = 0x0000;
crc_sick_val = 0x0000;
crc_ccitt_0000_val = 0x0000;
crc_ccitt_ffff_val = 0xffff;
crc_ccitt_1d0f_val = 0x1d0f;
crc_kermit_val = 0x0000;
crc_32_val = 0xffffffffL;
if ( do_ascii ) {
prev_byte = 0;
ptr = (unsigned char *) input_string;
while ( *ptr ) {
crc_16_val = update_crc_16( crc_16_val, *ptr );
crc_16_modbus_val = update_crc_16( crc_16_modbus_val, *ptr );
crc_dnp_val = update_crc_dnp( crc_dnp_val, *ptr );
crc_sick_val = update_crc_sick( crc_sick_val, *ptr, prev_byte );
crc_ccitt_0000_val = update_crc_ccitt( crc_ccitt_0000_val, *ptr );
crc_ccitt_ffff_val = update_crc_ccitt( crc_ccitt_ffff_val, *ptr );
crc_ccitt_1d0f_val = update_crc_ccitt( crc_ccitt_1d0f_val, *ptr );
crc_kermit_val = update_crc_kermit( crc_kermit_val, *ptr );
crc_32_val = update_crc_32( crc_32_val, *ptr );
prev_byte = *ptr;
ptr++;
}
}
else if ( do_hex ) {
prev_byte = 0;
ptr = (unsigned char *) input_string;
while ( *ptr != '\x80' ) {
hex_val = (unsigned char) ( ( * ptr & '\x0f' ) << 4 );
hex_val |= (unsigned char) ( ( *(ptr+1) & '\x0f' ) );
crc_16_val = update_crc_16( crc_16_val, hex_val );
crc_16_modbus_val = update_crc_16( crc_16_modbus_val, hex_val );
crc_dnp_val = update_crc_dnp( crc_dnp_val, hex_val );
crc_sick_val = update_crc_sick( crc_sick_val, hex_val, prev_byte );
crc_ccitt_0000_val = update_crc_ccitt( crc_ccitt_0000_val, hex_val );
crc_ccitt_ffff_val = update_crc_ccitt( crc_ccitt_ffff_val, hex_val );
crc_ccitt_1d0f_val = update_crc_ccitt( crc_ccitt_1d0f_val, hex_val );
crc_kermit_val = update_crc_kermit( crc_kermit_val, hex_val );
crc_32_val = update_crc_32( crc_32_val, hex_val );
prev_byte = hex_val;
ptr += 2;
}
input_string[0] = 0;
}
else {
prev_byte = 0;
#if defined(_MSC_VER)
fp = NULL;
fopen_s( & fp, argv[a], "rb" );
#else
fp = fopen( argv[a], "rb" );
#endif
if ( fp != NULL ) {
while( ( ch=fgetc( fp ) ) != EOF ) {
crc_16_val = update_crc_16( crc_16_val, (unsigned char) ch );
crc_16_modbus_val = update_crc_16( crc_16_modbus_val, (unsigned char) ch );
crc_dnp_val = update_crc_dnp( crc_dnp_val, (unsigned char) ch );
crc_sick_val = update_crc_sick( crc_sick_val, (unsigned char) ch, prev_byte );
crc_ccitt_0000_val = update_crc_ccitt( crc_ccitt_0000_val, (unsigned char) ch );
crc_ccitt_ffff_val = update_crc_ccitt( crc_ccitt_ffff_val, (unsigned char) ch );
crc_ccitt_1d0f_val = update_crc_ccitt( crc_ccitt_1d0f_val, (unsigned char) ch );
crc_kermit_val = update_crc_kermit( crc_kermit_val, (unsigned char) ch );
crc_32_val = update_crc_32( crc_32_val, (unsigned char) ch );
prev_byte = (unsigned char) ch;
}
fclose( fp );
}
else printf( "%s : cannot open file\n", argv[a] );
}
crc_32_val ^= 0xffffffffL;
crc_dnp_val = ~crc_dnp_val;
low_byte = (crc_dnp_val & 0xff00) >> 8;
high_byte = (crc_dnp_val & 0x00ff) << 8;
crc_dnp_val = low_byte | high_byte;
low_byte = (crc_sick_val & 0xff00) >> 8;
high_byte = (crc_sick_val & 0x00ff) << 8;
crc_sick_val = low_byte | high_byte;
low_byte = (crc_kermit_val & 0xff00) >> 8;
high_byte = (crc_kermit_val & 0x00ff) << 8;
crc_kermit_val = low_byte | high_byte;
printf( "%s%s%s :\nCRC16 = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC16 (Modbus) = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC16 (Sick) = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC-CCITT (0x0000) = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC-CCITT (0xffff) = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC-CCITT (0x1d0f) = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC-CCITT (Kermit) = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC-DNP = 0x%04" PRIX16 " / %" PRIu16 "\n"
"CRC32 = 0x%08" PRIX32 " / %" PRIu32 "\n"
, ( do_ascii || do_hex ) ? "\"" : ""
, ( ! do_ascii && ! do_hex ) ? argv[a] : input_string
, ( do_ascii || do_hex ) ? "\"" : ""
, crc_16_val, crc_16_val
, crc_16_modbus_val, crc_16_modbus_val
, crc_sick_val, crc_sick_val
, crc_ccitt_0000_val, crc_ccitt_0000_val
, crc_ccitt_ffff_val, crc_ccitt_ffff_val
, crc_ccitt_1d0f_val, crc_ccitt_1d0f_val
, crc_kermit_val, crc_kermit_val
, crc_dnp_val, crc_dnp_val
, crc_32_val, crc_32_val );
a++;
} while ( a < argc );
return 0;
} /* main (tstcrc.c) */
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