在Intel hex文件中填充任意大小的模式

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

#define MAX_LINE_LENGTH 1024

int main(int argc, char *argv[]) {
    if (argc != 3) {
        printf("Usage: %s<input_hex_file><output_hex_file>\n", argv[0]);
        return 1;
    }

    char *input_file = argv[1];
    char *output_file = argv[2];

    FILE *in = fopen(input_file, "r");
    if (!in) {
        printf("Failed to open input file %s\n", input_file);
        return 1;
    }

    FILE *out = fopen(output_file, "w");
    if (!out) {
        printf("Failed to open output file %s\n", output_file);
        fclose(in);
        return 1;
    }

    char line[MAX_LINE_LENGTH];
    while (fgets(line, MAX_LINE_LENGTH, in)) {
        // 解析Intel Hex文件的每一行
        unsigned int byte_count = strtol(&line[1], NULL, 16);
        unsigned int address = strtol(&line[3], NULL, 16);
        unsigned int record_type = strtol(&line[7 + 2 * byte_count], NULL, 16);

        // 填充数据模式
        if (record_type == 0) {
            // 在这里填充数据模式
            // 例如：将地址为0x1000的数据填充为0xFF
            if (address == 0x1000) {
                for (int i = 0; i< byte_count; i++) {
                    line[9 + 2 * i] = 'F';
                    line[10 + 2 * i] = 'F';
                }
            }
        }

        // 将修改后的行写入输出文件
        fputs(line, out);
    }

    fclose(in);
    fclose(out);

    return 0;
}