Linux C语言实现把微信Image的dat文件转成png图片

1. #include <stdio.h>
2. #include <dirent.h>
3. #include <errno.h>
4. #include <sys/types.h>
5. #include <sys/stat.h>
6. #include <fcntl.h>
7. #include <unistd.h>
8. #include <signal.h>
9. #include <stdlib.h>
10. #include <string.h>
12. #define BUFFER_SIZE 1024
14. void open_and_display_file(const char *filepath, const char *dir)
15. {
16.     unsigned char Decode = 0;
17.     static int image_id = 0;
18.     unsigned char imagePath[PATH_MAX] = {0};
19.     unsigned char buffer[BUFFER_SIZE] = {0};
20.     FILE *imageFp = NULL;
21.     FILE *file = NULL;
22.     int read_len = 0;
23.     int write_len = 0;
24.     sprintf(imagePath, "%s/%d.png", dir, image_id);
25.     image_id++;
26.     file = fopen(filepath, "r");
27.     if (file == NULL)
28.     {
29.         perror("无法打开文件:");
30.         return;
31.     }
32.     imageFp = fopen(imagePath, "wb+");
33.     if (imageFp == NULL)
34.     {
35.         perror("无法打开文件:");
36.         return;
37.     }
38.     ftruncate(fileno(imageFp), 0);
39.     fread(buffer, 1, 2, file);
40.     i

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