python二机制文件解析

参考连接：https://blog.csdn.net/lovelyaiq/article/details/81988185

C语言解析：

#include "stdlib.h"
#include "stdio.h"

typedef unsigned int uint32_t;
typedef unsigned char uint8_t;

#define LESSON_INTERVAL_TRAIN_NUM        30

typedef enum {
    SPORT_SEGMENT_WARM_UP = 0,
    SPORT_SEGMENT_TRAIN,
    SPORT_SEGMENT_REST,
    SPORT_SEGMENT_RELAX
}SPORT_SEGMENT_TYPE_E;

typedef struct sport_segment_cell
{
    SPORT_SEGMENT_TYPE_E type;
    uint32_t start_timestamp;
}sport_segment_cell_t;

typedef struct sport_segment
{
    uint8_t seg_max;
    sport_segment_cell_t seg[LESSON_INTERVAL_TRAIN_NUM];
}sport_segment_t;

typedef struct core_segment
{
    uint32_t crc32;
    sport_segment_t data;
}core_segment;

int file_parse(const char* file_name)
{
    int size = 0;
    core_segment seg = {0};
    FILE *fp = fopen(file_name, "rb");

    if(NULL == fp)
    {
        printf("file::%s open failed\n", file_name);
        return -1;
    }

    size = fread(&seg, 1, sizeof(core_segment), fp);

    printf("size==%d, src ==%d\n", size, sizeof(core_segment));
    #if 1
    if(sizeof(core_segment) != size)
    {
        printf("read file failed size==%d\n", size);
        fclose(fp);
        return -1;
    }
    #endif

    printf("crc32==%lu\n", seg.crc32);
    printf("seg max==%d\n", seg.data.seg_max);

    for(int i = 0; i < seg.data.seg_max; i++)
    {
        printf("info [%d, %ld]\n", seg.data.seg[i].type, seg.data.seg[i].start_timestamp);
    }

    fclose(fp);

    //printf("core segment size==%d\n", sizeof(core_segment));
}

int main(int argc, char const *argv[])
{

    printf("%d\n", argc);

    for(int i = 0; i < argc; i++)
    {
        printf("%d,%s\n", i, argv[i]);
    }

    if(argc >= 2)
    {
        file_parse(argv[1]);
    }
    return 0;
}

对应的 python 代码如下：

import sys
import struct
import os

def file_pase(file_name):
    print('file_name==', file_name)
    try:
        f_src = open(file_name, 'rb')
        contents = f_src.read()
        offset = 0
        print(len(contents))
        #data = struct.unpack('62i', contents)
        data = struct.unpack_from('2I', contents, offset)
        print('data==', data)
        #'''
        #print(data[0],data[1])
        offset += 8
        max = data[1]
        for index in range(max):
            data = struct.unpack_from('2I', contents, offset)
            print(data[0],data[1])
            offset += 8
        #'''

        f_src.close()
    except ValueError as e:
        print('error:',e)
    pass
if __name__ == '__main__':
    print('Hello World! ', sys.argv)
    for i in sys.argv:
        #print(i)
        if '.seg' in i:
            file_pase(i)