文件分割器代码,C代码库,德仔网

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【C】文件分割器
作者:徐术挺 / 发布于2013/6/4/ 678
用C对文件操作的函数写了一个文件分割器，可以分割和组合

	read.cpp

	

	#include"read.h"
	//我的网站：http://www.itbzyy.cn希望有时间可以进来看看，交流交流学习心得
	int main(void)
	{
	//clrscr();system("cls");
	int split_join = 0;
	int temp;
	system("cls");
	note_split_join();
	cin >>split_join;
	cout << split_join;
	switch(split_join)
	{
	 case 1:
	 temp = split();
	 if(temp > 0)
	 {
	 fseek( source_file, 0L, SEEK_END );
	 now_taskamount = ftell( source_file );
	 cout << "请输入要分割块的大小(单位KB，1M=1024KB，1G=1024M)\a"<<endl;
	 cin >> block_size;
	 if(block_size <= 0)
	 {
	 cout << "输入数据块大小无效，请退出\n\a";
	 fclose(source_file);
	 return 0;
	 }
	 block_size = block_size * 1024;
	 if(now_taskamount <= block_size)
	 {
	 cout << "该文件不需分割或者文件过大"<<endl;
	 }
	 else
	 {
	 bzyyfileInfo bz = get_file_name(source_file_name);
	 cout << "now i got the file info name is "<< bz.filename << " and the ext is "<< bz.extname<<endl;
	 b = 0;
	 char *buff = new char[block_size];
	 size_t mm;
	 a = 0;
	 FILE * temp_file = NULL;
	 string filestrnum = "";
	 string tempfilename = "";
	 char filenum[25];
	 fseek(source_file,0L,SEEK_SET);//文件指针归为回到文件开头
	 do{
	 mm = fread(buff,1,block_size,source_file);
	 a ++;
	 if(mm > 0)
	 {
	 itoa(a, filenum, 10);
	 filestrnum = filenum;
	 tempfilename = bz.filename + filestrnum + bz.extname;
	 temp_file = fopen(tempfilename.c_str(),"wb");
	 cout << "当前写入文件："<<tempfilename<<endl;
	 fwrite(buff,1,mm,temp_file);
	 fclose(temp_file);
	 }
	
	 }
	 while(mm);
	 //system("pause");
	 delete [] buff;
	 }
	 fclose(source_file);
	 }
	 break;
	 case 2:
	
	 a = join();
	 if(a == 1)
	 {
	 string pathpre,dotext,ringt_name;
	 FILE * temp_file = NULL;
	 size_t mm;
	 char filenum[25];
	 block_size = block_size * 1024;
	 char *buff = new char[block_size+1];
	
	
	 cout << "请输入您要合并文件的路径"<<endl;
	 cin >> pathpre;
	 cout << "请输入您文件的扩展名,请带上那个点（.）"<<endl;
	 cin >> dotext;
	 cout << "请输入您要合并文件的个数"<<endl;
	 cin >> a;
	 a++;
	 for(b = 1;b<a;b++ )
	 {
	 itoa(b, filenum, 10);
	 ringt_name = pathpre + filenum + dotext;
	
	 temp_file = fopen(ringt_name.c_str(),"rb");
	 if(temp_file)
	 {
	 do
	 {
	 mm = fread(buff,1,block_size,temp_file);
	
	 if(mm>0)
	 {
	 fwrite(buff,1,mm,source_file);
	 }
	 }while(mm > 0);
	
	 fclose(temp_file);
	 }
	 }
	 delete [] buff;
	 }
	 cout<< "\n\a\a处理完成";
	 break;
	 case 3:
	 cout << endl << "谢谢您的使用！"<<endl;
	 break;
	 default:
	 cout <<endl<< "输入错误，请退出，谢谢使用！"<<endl;
	 break;
	}
	return 0;
	}

	void note_split_join()
	{
	cout <<"\n\n本系统将准备完成一个文件分割和合并的功能！\n"<< endl;
	cout <<"\n\n请选择下面的功能[请输入对应的序号]：\n"<< endl;
	cout <<"\t1、分割文件\n"<< endl;
	cout <<"\t2、合并文件\n"<< endl;
	cout <<"\t3、退出\n"<< endl << "\t\a";
	}

	int join()
	{
	cout << "\n\n您选择的是合并文件"<<endl;
	cout << "提示：\n在您合并文件时：请将文件按照一定规则命名并排序,如您有10个文件，分别是a_1.txt,a_2.txt ... a_10.txt"<<endl;
	cout << "\n当输入路径名的时候不要输入点（.）及其以后的内容，如./abc/ddd_1.txt请输入./abc/ddd_\t即可";
	cout << "\n请输入您要生成文件的新文件名称(注意：请确保文件是空文件,否则会损坏文件)"<<endl;
	cin >> source_file_name;
	
	source_file = fopen(source_file_name.c_str(),"ab+");
	if(source_file)
	{
	 return 1;
	}
	cout << "创建文件对象失败"<<endl;
	return 0;
	}

	int split()
	{
	cout << "您选择的是分割文件" <<endl;
	cout << "请输入您要分割文件的访问路径,文件分隔符请用'/'" <<endl;
	cin >> source_file_name;
	source_file = fopen(source_file_name.c_str(),"rb");
	if(source_file)
	{
	}
	else
	{
	 cout << "打开文件"<<source_file_name<<"失败，请退出！"<<endl;
	 return 0;
	}
	return 1;
	
	}

	bzyyfileInfo get_file_name(string str)
	{
	int pos1,pos2;
	bzyyfileInfo bfi;
	pos1 = str.find_last_of(cp,str.size());
	
	if(pos1 != -1)
	{
	 str = str.substr(pos1+1);
	}
	pos2 = str.find_last_of('.',str.size());
	if(pos2 == -1)
	{
	 bfi.filename = str + "_";
	 bfi.extname = "";
	}
	else
	{
	 bfi.filename = str.substr(0,pos2)+"_";
	 bfi.extname = str.substr(pos2);
	}
	
	return bfi;
	}

	-------------------------------------

	read.h

	

	#include <stdio.h>
	#include <iostream>
	//#include <conio.h>
	#include <stdlib.h>
	#include<string>

	using namespace std;

	struct bzyyfileInfo
	{
	string filename;
	string extname;
	};

	int split();
	void note_split_join();
	bzyyfileInfo get_file_name(string str);
	int join();

	//统计
	int task_num = 0;//当前的任务数量
	int now_taskamount = 0;//当前的任务总量
	int now_task_done = 0 ;//已完成的任务数量
	int now_taskamount_done = 0; //当前已完成的任务量
	int a,b;

	//当前文件
	FILE * source_file = NULL;


	string source_file_name;
	char * cp_source_pathname;

	long block_size = 2000;//分割模块大小

	char cp = '/';//路径符号
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