C/C++ 读写文件

野性酷女 2021-09-20 21:16 343阅读 0赞

见《C/C++读写文本文件、二进制文件》：[https://blog.csdn.net/nichengwuxiao/article/details/78789225][https_blog.csdn.net_nichengwuxiao_article_details_78789225]

《C++fstream文件流处理对中文字符不支持的解决办法》[https://my.oschina.net/abcijkxyz/blog/722482][https_my.oschina.net_abcijkxyz_blog_722482]

FileDo.h

#pragma once
    
    #include <string>
    
    using namespace std;
    
    void WriteBinFile(const char *filename, string Contain);
    string ReadBinFile(const char *filename);
    void WriteTxtFile(const char *filename, vector<string> vContain);
    void ReadTxtFile(const char *filename, vector<string> &vText);

FileDo.cpp

#include <iostream>
    #include <vector>
    #include <string>
    #include <fstream>
    #define _AFXDLL
    #include <afx.h>
    
    #include <locale>
    
    using namespace std;
    
    void WriteBinFile(const char *filename, string Contain)
    {
    	locale &loc=locale::global(locale(locale(),"",LC_CTYPE));  // 不论以输出文件流还是输入文件流，此操作应放在其两边
            setlocale(LC_ALL,"Chinese-simplified");
    	ofstream fout(filename, ios::binary);
    	locale::global(loc); //还原全局区域设定
    	if(fout.is_open() == false){printf("Error: open failed!!!\n"); while (1);}
    	const unsigned int BlockSize = 1024;
    	char *buf = (char*)Contain.c_str();
    	int i;
    	for (i=0; i<Contain.length()/BlockSize; i++)fout.write(buf+BlockSize*i, BlockSize);
    	fout.write(buf+BlockSize*i, Contain.length()%BlockSize);
    	fout.close();
    }
    
    string ReadBinFile(const char *filename)
    {
    	locale &loc=locale::global(locale(locale(),"",LC_CTYPE));  // 不论以输出文件流还是输入文件流，此操作应放在其两边
            setlocale(LC_ALL,"Chinese-simplified");
    	ifstream fin(filename, ios::binary);
    	locale::global(loc); //还原全局区域设定
    	if(fin.is_open() == false){printf("Error: open failed!!! %s\n", filename); while (1);}
    	const unsigned int BlockSize = 1024;
    	string strRet;
    	char buf[BlockSize];
    	for (int i=0; ; i++)
    	{
    		fin.read(buf, BlockSize);
    		int read_size = fin.gcount();
    		if (read_size == 0)break;
    		strRet += string(buf, read_size);
    	}
    	fin.close();
    #if 1
    	printf("《%s》内容为:", filename);
    	for (int i=0; i<strRet.length()&&i<16; i++)printf("%02X ", (unsigned char)strRet[i]);printf("等等\n");
    #endif
    	return strRet;
    }
    
    void WriteTxtFile(const char *filename, vector<string> vContain)
    {
    	locale &loc=locale::global(locale(locale(),"",LC_CTYPE));  // 不论以输出文件流还是输入文件流，此操作应放在其两边
            setlocale(LC_ALL,"Chinese-simplified");
    	ofstream fout(filename);
    	locale::global(loc); //还原全局区域设定
    	if(fout.is_open() == false){printf("Error: open failed!!!\n"); while (1);}
    	for (int i=0; i<vContain.size(); i++)fout<<vContain[i]<<endl;
    	fout.close();
    }
    
    void ReadTxtFile(const char *filename, vector<string> &vText) // 如果文件太大，则不宜用返回值传递，有时如果太大，会很慢，相当于再读一遍的时间。
    {
    	locale &loc=locale::global(locale(locale(),"",LC_CTYPE));  // 不论以输出文件流还是输入文件流，此操作应放在其两边
            setlocale(LC_ALL,"Chinese-simplified");
    	ifstream fin(filename);
    	locale::global(loc); //还原全局区域设定
    	if(fin.is_open() == false){printf("Error: open failed!!! %s\n", filename); while (1);}
    	unsigned long TickOld = GetTickCount();
    	int lineCnt = 0;
    	for (string strLine; getline(fin, strLine); lineCnt++)
    	{
    		vText.push_back(strLine);
    		if (GetTickCount() - TickOld > 1000)
    		{
    			TickOld = GetTickCount();
    			printf("ReadTxtFile %d line\n", lineCnt);
    		}
    	}
    	fin.close();
    	printf("Read file End\n");
    }

[https_blog.csdn.net_nichengwuxiao_article_details_78789225]: https://blog.csdn.net/nichengwuxiao/article/details/78789225
[https_my.oschina.net_abcijkxyz_blog_722482]: https://my.oschina.net/abcijkxyz/blog/722482