split/char-wchar/文件操作

1>分割字符串

#pragma once
#include <string>
#include <vector>
using namespace std;
//分割字符串，之间用逗号分开
void CO_Split(const wstring &src, wstring separate_character,vector<wstring>& strs)
{
 //分割字符串长度，这样就可以支持多字符串的分隔符
 int separate_characterLen = separate_character.length();
 int lastPosition = 0, index = -1;
 while (-1 != (index = src.find(separate_character, lastPosition)))
 {
  strs.push_back(src.substr(lastPosition, index - lastPosition));
  lastPosition = index + separate_characterLen;
 }
 wstring lastString = src.substr(lastPosition); 
 if (!lastString.empty())
  strs.push_back(lastString);  
}

2>  wchar->char

char* WcharToChar(const WCHAR* wcr)
{
 char* pchar=NULL;
 int len=WideCharToMultiByte(CP_ACP,0,wcr,-1,NULL,0,NULL,NULL);
 pchar=new char[len+1];
 WideCharToMultiByte(CP_ACP,0,wcr,-1,pchar,len,NULL,NULL);
 pchar[len]='';
 return pchar;
}

int wcharTochar(const wchar_t* src,char* dest)
{
 int size = ::WideCharToMultiByte( 936, 0, src, -1, NULL, 0, NULL, FALSE );
 if (size > 0 )
 {
  size = ::WideCharToMultiByte( 936, 0, src, -1, dest, size, NULL, FALSE );
 }
 return size;
}

3>  char->wchar

WCHAR* CharToWchar(const char* c)
{
 WCHAR* pwchar=NULL;
 int len=MultiByteToWideChar(CP_ACP,0,c,-1,NULL,0);
 pwchar=new wchar_t[len+1];
 MultiByteToWideChar(CP_ACP,0,c,-1,pwchar,len);
 pwchar[len]='';
 return pwchar;
}

int charTowchar(const char* src,wchar_t* dest)
{
 int size = ::MultiByteToWideChar( 936, 0, src, -1, NULL, 0);
 if (size > 0 )
 {
  size = ::MultiByteToWideChar( 936, 0, src, -1, dest, size);
 }
 return size;
}

//文件操作

//-------------------------------------------------------------------------------

//创建文件

bool CO_Create()
{	//创建文件
	bool isCreation=true;
	HANDLE hFile = CreateFileW(L"C:\save_radio_list.txt",GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
	if (INVALID_HANDLE_VALUE==hFile)
	{
		isCreation=false;
		printf("创建文件失败!");
	}
	//关闭文件
	CloseHandle(hFile);
	return isCreation;
}

//读文件

CHAR* CO_Read()
{	
	HANDLE hFile = CreateFileW(L"C:\save_radio_list.txt",GENERIC_READ,0,NULL,OPEN_EXISTING,	FILE_ATTRIBUTE_NORMAL,NULL);
	//获取文件长度
	DWORD fileSize  = GetFileSize( hFile, NULL);
	//分配空间
	CHAR* pszBuf=new CHAR[fileSize + 1];
	memset( pszBuf, 0, fileSize + 1 );
	//设置当前读取的位置
	SetFilePointer( hFile, 0, NULL, FILE_BEGIN);
	//读取数据
	DWORD nRead = 0;
	ReadFile( hFile, pszBuf, fileSize+1, &nRead, NULL );
	CloseHandle( hFile );
	return pszBuf;
	//free( pszBuf );
	////关闭文件
	//CloseHandle( hFile );
}

//写文件

void CO_Write(CHAR* szBuff)
{	
	DWORD nWritten = 0;
	HANDLE hFile = CreateFileW(L"C:\save_radio_list.txt",GENERIC_WRITE,0,NULL,TRUNCATE_EXISTING,	FILE_ATTRIBUTE_NORMAL,NULL);
	WriteFile( hFile, szBuff, (DWORD)strlen(szBuff),&nWritten, NULL);
	FlushFileBuffers(hFile);
	CloseHandle( hFile );
}

//main

void main()
{
	CHAR* pszBuf=NULL;
	CHAR* str="1234567890asadf";
	CO_Create();
	CO_Write(str);
	pszBuf=CO_Read();			
	printf( "result:%s
", pszBuf );
	printf("hello");
	delete pszBuf;
	getchar();
}