[原创]Checksum Tool 累加和校验工具

实用的小程序，用于计算和校验

/**
* @file         checksum.c
* @author       bin (https://ay123.net)
* @brief        Utility to caculate checksum
* @version      0.1
* @date         2021-10-13
*
* @copyright    Copyright (c) 2021
*
* @History      First create.
*
*/

#include <stdio.h>
#include <stdlib.h>

//
// Avoid VS build fail
//
#pragma warning(disable:4996)

//
// Message string define
//
#define  STRING_PARAM_ERROR             "Parameter error!\n\r"
#define  STRING_FILE_OPEN_FAILED        "File open failed!\n\r"
#define  STRING_FILE_READ_FAILED        "File read failed!\n\r"
#define  STRING_ALLOCATE_MEM_FAILED     "Allocate memmory failed!\n\r"

#define  STRING_CHECKSUM                "%010X\n\r"
#define  STRING_FILE_OPEN_MODE          "rb+"


int main(int argc,  char ** argv)
{
    FILE                 * fp;
    unsigned char        * file_buffer;
    unsigned int           file_size;
    unsigned long int      checksum;
    unsigned long int      index;

    if (argc != 2)
    {
        printf(STRING_PARAM_ERROR);
        return 0;
    }

    fp = fopen(argv[1], STRING_FILE_OPEN_MODE);
    
    if (fp == NULL) {
        printf(STRING_FILE_OPEN_FAILED);
        return 0;
    }
    //
    // Get file size
    //
    fseek(fp, 0, SEEK_END);
    file_size = ftell(fp);

    //
    // Set file pointer to file header
    //
    rewind(fp);

    //
    // Allocate memory
    //
    file_buffer = malloc(file_size);
    if (file_buffer == NULL) {
        printf(STRING_ALLOCATE_MEM_FAILED);
        return 0;
    }

    //
    // Read file data  to buffer
    //
    if (fread(file_buffer, file_size, 1, fp) != 1) 
    {
        printf(STRING_FILE_READ_FAILED);
        return 0;
    }

    //
    // Calculate the cumulative sum
    //
    for (index = 0, checksum = 0; index < file_size; index++)
    {
        checksum += file_buffer[index] & 0xFF;
    }

    //
    // Output result
    //
    printf(STRING_CHECKSUM, checksum);

    //
    // Close file stream
    //
    fclose(fp);
    
    //
    // Free resource
    //
    free(file_buffer);

    return 0;
}

附件

Checksum: Utility to caculate checksum 计算和校验的实用程序 (gitee.com)