C语言打包解包程序

C语言打包解包程序

本程序是一个打包解包程序，提供了打包解包文件夹，查看打包文件信息，解包等功能。 如果需要打包的文件夹中存在文件夹，会递归打包，解包时也会递归解包，保证原样还原。

头文件及main函数

#include<stdio.h> #include<io.h> #include<direct.h> #include<stdlib.h> #include<string.h> int main(int argc, char *argv[]) { if(argc == 1 && strcmp(argv[0], "pack") == 0) pack(); if(argc == 3 && strcmp(argv[1], "-t") == 0) pack_t(argv[2]); if(argc == 4 && strcmp(argv[1], "-r") == 0) pack_r(argv[2], argv[3]); if(argc == 3 && strcmp(argv[1], "-g") == 0) pack_g(argv[2]); if(argc == 3 && strcmp(argv[1], "-l") == 0) pack_l(argv[2]); return 0; }

主函数使用命令行参数argc和argv。

查看pack用法

void pack() { printf("\npack的用法:\n\n"); printf("\t-t\t打包一个文件\n"); printf("\t-g\t解压一个打包文件\n"); printf("\t-l\t查看打包文件信息\n"); printf("\t-r\t打包匹配文件\n\n"); return; }

打包程序pack_t()

假如需要打包 E:\temp 文件夹，提供参数 E:\temp，程序执行后会删除temp文件夹，生成一个名为temp1的打包文件,所在位置是E:\temp1

typedef struct file { char name[_MAX_FNAME]; _fsize_t size; int bol; } file; _fsize_t pack_t(char *s1) { char folder_location[_MAX_FNAME]; //存储文件夹路径 strcpy(folder_location, s1); strcat(folder_location, "\\*"); struct _finddata_t file_info; long handle = _findfirst(folder_location, &file_info); if(handle == -1) { printf("folder location ERROR!"); return 0; } int file_sum = 0; //存储文件和文件夹总数 do { if(strcmp(file_info.name, ".") != 0 && strcmp(file_info.name, "..") != 0) ++file_sum; } while(_findnext(handle, &file_info) == 0); //统计文件和文件夹数量 除了 . 和 .. 文件 _findclose(handle); char file_location[_MAX_FNAME]; //打包文件信息 strcpy(file_location, folder_location); int len2 = strlen(file_location); file_location[len2-2] = '\0'; strcat(file_location, "1"); //用于区分文件和文件夹 FILE *in = fopen(file_location, "ab"); char delete_folder_string[_MAX_FNAME] = "rd "; //删除文件夹字符串 strcat(delete_folder_string, folder_location); int len = strlen(delete_folder_string); delete_folder_string[len-2] = '\0'; if(file_sum == 0) { fwrite(&file_sum, sizeof(int), 1, in); fclose(in); system(delete_folder_string); //删除文件夹 return sizeof(int); } int i = 0; file *file_info_array = (file *)malloc(file_sum * sizeof(file)); //记录每个文件信息 handle = _findfirst(folder_location, &file_info); do { if(strcmp(file_info.name, ".") != 0 && strcmp(file_info.name, "..") != 0) { if(file_info.attrib == _A_SUBDIR) { char folder_folder_location[_MAX_FNAME]; //存储文件夹的路径 strcpy(folder_folder_location, folder_location); int len1 = strlen(folder_folder_location); folder_folder_location[len1-1] = '\0'; strcat(folder_folder_location, file_info.name); strcpy(file_info_array[i].name, file_info.name); strcat(file_info_array[i].name, "1"); file_info_array[i].size = pack_t(folder_folder_location); //递归进入文件夹中 file_info_array[i].bol = 1; //1表示文件夹 ++i; } else { strcpy(file_info_array[i].name, file_info.name); file_info_array[i].size = file_info.size; file_info_array[i].bol = 0; //0表示文件 ++i; } } } while(_findnext(handle, &file_info) == 0); _findclose(handle); _fsize_t ret = 0; fwrite(&file_sum, sizeof(int), 1, in); ret += sizeof(int) * 1; fwrite(file_info_array, sizeof(file), file_sum, in); ret += sizeof(file) * file_sum; for(i = 0; i < file_sum; ++i) { //copy文件 char folder_file_location[_MAX_FNAME]; //存储文件夹中文件的位置 strcpy(folder_file_location, folder_location); folder_file_location[len2-1] = '\0'; strcat(folder_file_location, file_info_array[i].name); FILE *out = fopen(folder_file_location, "rb"); int rc = 0; //每一次转移的字节数 unsigned char *buf = (unsigned char *)malloc(30*sizeof(unsigned char)); //存储每一次转移的字节 while((rc = fread(buf, sizeof(unsigned char), 30, out)) != 0) { ret += rc; fwrite(buf, sizeof(unsigned char), rc, in); } free(buf); fclose(out); remove(folder_file_location); //删除文件 } free(file_info_array); fclose(in); system(delete_folder_string); //删除文件夹 return ret; }

查看打包文件信息pack_l()

提供打包文件的位置，例如E:\temp1

typedef struct folder_info { char str[_MAX_FNAME]; int begin; int end; long int offset; struct folder_info *next; } folder; void pack_l(char *s1) { char file_location[_MAX_FNAME]; strcpy(file_location, s1); int len = strlen(file_location) - 1; file_location[len] = '\0'; //去除'1' while(len >= 0 && file_location[len] != '\\') --len; ++len; printf("\n%s : \n", file_location + len); FILE *out = fopen(s1, "rb"); folder *hand = (folder *)malloc(sizeof(folder)); strcpy(hand->str, "\t"); hand->begin = 0; hand->offset = 0; hand->next = NULL; while(hand != NULL) { fseek(out, hand->offset, SEEK_SET); int offset = hand->offset; int file_sum = 0; fread(&file_sum, sizeof(int), 1, out); offset += sizeof(int); hand->end = file_sum; if(file_sum != 0) { file *file_info_array = (file *)malloc(file_sum * sizeof(file)); //记录每个文件信息 fread(file_info_array, sizeof(file), file_sum, out); offset += sizeof(file) * file_sum; int i = 0; for(i = 0; i < hand->begin; ++i) offset += file_info_array[i].size; for(i = hand->begin; i < hand->end; ++i) { if(file_info_array[i].bol == 0) //文件 printf("%s%s\n", hand->str, file_info_array[i].name, file_info_array[i].size); else { //文件夹 char folder_name[_MAX_FNAME]; strcpy(folder_name, file_info_array[i].name); folder_name[strlen(folder_name)-1] = '\0'; printf("%s%s : \n", hand->str, folder_name); hand->begin = i + 1; folder *last = (folder *)malloc(sizeof(folder)); last->begin = 0; last->end = -1; last->next = hand; last->offset = offset; strcpy(last->str, hand->str); strcat(last->str, "\t"); hand = last; break; } offset += file_info_array[i].size; } free(file_info_array); if(i == hand->end) { folder* next = hand->next; free(hand); hand = next; } } else { //file_sum == 0 folder* next = hand->next; free(hand); hand = next; } } fclose(out); printf("\n"); return; }

解包程序pack_g()

提供打包文件的位置，例如E:\temp1

void pack_g(char *s1) { char pack_file[_MAX_FNAME]; strcpy(pack_file, s1); int len = strlen(pack_file); pack_file[len-1] = '\0'; //去1 char create_folder_string[_MAX_FNAME] = "md "; //存储需要创建的文件夹的路径 strcat(create_folder_string, pack_file); system(create_folder_string); //创建文件夹 int file_sum; FILE *out = fopen(s1, "rb"); fread(&file_sum, sizeof(int), 1, out); if(file_sum == 0) { //空文件夹打包成的文件 fclose(out); //关闭文件夹 remove(s1); //删除打包文件 return; } file *file_info_array = (file *)malloc(file_sum * sizeof(file)); //记录每个文件信息 fread(file_info_array, sizeof(file), file_sum, out); for(int i = 0; i < file_sum; ++i) { //依次解压各个文件 char file_location[_MAX_FNAME]; strcpy(file_location, pack_file); strcat(file_location, "\\"); strcat(file_location, file_info_array[i].name); FILE *in = fopen(file_location, "wb"); //创建文件 int rc = 0; //每一次转移的字节数 unsigned char *buf = (unsigned char *)malloc(30*sizeof(unsigned char)); //存储每一次转移的字节 int size = file_info_array[i].size; //文件大小 while(size != 0) { rc = size >= 30 ? 30 : size; size -= rc; fread(buf, sizeof(unsigned char), rc, out); fwrite(buf, sizeof(unsigned char), rc, in); } free(buf); fclose(in); if(file_info_array[i].bol == 1) { //如果解压出的文件是一个打包的文件夹 则 pack_g(file_location); } } free(file_info_array); fclose(out); remove(s1); //删除打包文件 return; }

打包匹配文件pack_r()

提供两个参数，第一个是匹配文件位置及匹配信息，例如E:\temp*.txt 。第二个是打包成的文件及位置，例如E:\one。这个函数我没有写没有对应的解包函数。

int match(char *s1, char *s2) { if(*s1 == '\0' && *s2 == '\0') return 1; if(*s2 == '\0') return 0; if(*s1 == '\0' && *s2 != '*') return 0; if(*s1 == '\0' && *s2 == '*') match(s1, s2+1); if(*s2 == '?') return match(s1+1, s2+1); if(*s2 == '*') return match(s1, s2+1) || match(s1+1, s2); } void pack_r(char *s1, char *s2) { char match_string[_MAX_FNAME]; char folder_location[_MAX_FNAME]; int len = strlen(s1); while(len >= 0 && s1[len] != '\\') --len; strncpy(folder_location, s1, len); folder_location[len] = '\0'; char match_file_location[_MAX_FNAME]; strcpy(match_file_location, folder_location); strcat(folder_location, "\\*"); ++len; strcpy(match_string, s1+len); char file_location[_MAX_FNAME]; strcpy(file_location, s2); struct _finddata_t file_info; long handle = _findfirst(folder_location, &file_info); if(handle == -1) { printf("folder location ERROR!"); return; } int file_sum = 0; //匹配文件数量 do { if(file_info.attrib != _A_SUBDIR && match(file_info.name, match_string)) ++file_sum; } while(_findnext(handle, &file_info) == 0); //统计匹配文件数量 _findclose(handle); if(file_sum == 0) printf("match string ERROR!"); int i = 0; file *file_info_array = (file *)malloc(file_sum * sizeof(file)); //记录每个文件信息 handle = _findfirst(folder_location, &file_info); do { if(file_info.attrib != _A_SUBDIR && match(file_info.name, match_string)) { file_info_array[i].bol = 1; file_info_array[i].size = file_info.size; strcpy(file_info_array[i].name, file_info.name); ++i; } } while(_findnext(handle, &file_info) == 0); _findclose(handle); FILE *in = fopen(file_location, "wb"); if(in == NULL) { free(file_info_array); printf("pack file location ERROR!"); return; } fwrite(&file_sum, sizeof(int), 1, in); fwrite(file_info_array, sizeof(file), file_sum, in); strcat(match_file_location, "\\"); for(i = 0; i < file_sum; ++i) { char str[_MAX_FNAME]; strcpy(str, match_file_location); strcat(str, file_info_array[i].name); FILE *out = fopen(str, "rb"); int rc = 0; //每一次转移的字节数 unsigned char *buf = (unsigned char *)malloc(30*sizeof(unsigned char)); //存储每一次转移的字节 while((rc = fread(buf, sizeof(unsigned char), 30, out)) != 0) { fwrite(buf, sizeof(unsigned char), rc, in); } free(buf); fclose(out); } free(file_info_array); fclose(in); return; }

下面这张图是在cmd下的演示 这个程序有很多不足的地方，比如打包程序只能生成特定位置的特定文件名的打包文件，没有进度条，打包匹配文件没有对应的解包函数。

后期我会写一个完美的版本，使用C++语言，用类实现。

由于自身水平有限，并且相关的参考资料较少，因此程序不能保证完全正确（至少作者没发现有什么bug），如果在阅读的过程中发现了问题，欢迎及时与作者练习。也希望能有机会和大家多多交流学习心得。