C++ 字符编码转换类

记录一下C++ 编码转换的函数：

 #pragma once
 #include "afx.h"

 #define DEFAULT_CODE 0
 #define CHINESE_SIMPLIFIED 1
 #define   CHINESE_TRADITIONAL 2

 class CChineseConvertor:
 //public CObject
 {
 public:
     CChineseConvertor(void);
     ~CChineseConvertor(void);
     LPSTR Big52GBKSimplified(char * szText);
     LPSTR Big52GBKTraditional(char * szText);
     LPSTR GBK2Big5(char * szText);
     LPSTR GBKSimplified2GBKTraditional(char * szSimplified);
     LPSTR GBKTraditional2GBKSimplified(char * szTraditional);
     LPWSTR UTF82UNICODE(char*   utf8str);
     LPSTR UNICODE2UTF8(LPCWSTR  strText);

     char *m_pszUnknown;
     // 转换到Unicode
     LPWSTR ToUnicode(char * szSource, int nEncoding);
     LPSTR ToMultiByte(LPCWSTR szSource, int nEncoding);
 };

 #include "stdafx.h"
 #include "Coding.h"

 CChineseConvertor::CChineseConvertor(void)
 {
   m_pszUnknown = new char[];
   m_pszUnknown[]=' ';
   m_pszUnknown[]=;
 }

 CChineseConvertor::~CChineseConvertor(void)
 {
   delete[] m_pszUnknown;
   m_pszUnknown = NULL;
 }

 //big5 to GBK_简体
 LPSTR CChineseConvertor::Big52GBKSimplified(char * szText)
 {
   int nLength;
   wchar_t *pBuffer;
   LPSTR pResult;
   int nResultLength;

   nLength=MultiByteToWideChar(,,szText,strlen(szText),NULL,);
   pBuffer=new wchar_t[nLength+];
   MultiByteToWideChar(,,(LPCSTR)szText,strlen(szText),(LPWSTR)pBuffer,nLength);
   pBuffer[nLength]=;

   nResultLength=WideCharToMultiByte(,,pBuffer,nLength,NULL,,m_pszUnknown,FALSE);
   pResult=new char[nResultLength+];
   WideCharToMultiByte(,,(LPWSTR)pBuffer,nLength,(LPSTR)pResult,nResultLength,"  ",FALSE);
   pResult[nResultLength]=;

   return GBKTraditional2GBKSimplified(pResult);

 }

 //big5 to GBK_繁体
 LPSTR CChineseConvertor::Big52GBKTraditional(char * szText)
 {
   int nLength;
   wchar_t *pBuffer;
   LPSTR pResult;
   int nResultLength;

   nLength=MultiByteToWideChar(,,szText,strlen(szText),NULL,);
   pBuffer=new wchar_t[nLength+];
   MultiByteToWideChar(,,(LPCSTR)szText,strlen(szText),(LPWSTR)pBuffer,nLength);
   pBuffer[nLength]=;

   nResultLength=WideCharToMultiByte(,,pBuffer,nLength,NULL,,m_pszUnknown,FALSE);
   pResult=new char[nResultLength+];
   WideCharToMultiByte(,,(LPWSTR)pBuffer,nLength,(LPSTR)pResult,nResultLength,"  ",FALSE);
   pResult[nResultLength]=;

   return pResult;
 }

 //GBK_简体 to GBK_繁体
 LPSTR CChineseConvertor::GBKTraditional2GBKSimplified(char * szTraditional)
 {
   LCID dwLocale;
   WORD wLangID;
   wLangID=MAKELANGID(LANG_CHINESE,SUBLANG_CHINESE_SIMPLIFIED);
   dwLocale=MAKELCID(wLangID,SORT_CHINESE_PRC);

   int nLength;
   char *pBuffer;
   nLength=LCMapStringA(dwLocale,LCMAP_SIMPLIFIED_CHINESE,(LPCSTR)szTraditional,strlen(szTraditional),NULL,);
   pBuffer=new char[nLength+];
   pBuffer[nLength]=;
   LCMapStringA(dwLocale,LCMAP_SIMPLIFIED_CHINESE,(LPCSTR)szTraditional,strlen(szTraditional),pBuffer,nLength);
   return pBuffer;
 }

 //GBK_简体 to big5
 LPSTR CChineseConvertor::GBK2Big5(char * szText)
 {
   LPSTR szGBKTraditional;
   int nLength;
   wchar_t *pBuffer;
   LPSTR pResult;
   int nResultLength;

   szGBKTraditional=GBKSimplified2GBKTraditional(szText);
   nLength=MultiByteToWideChar(,,szGBKTraditional,strlen(szGBKTraditional),NULL,);
   pBuffer=new wchar_t[nLength+];
   MultiByteToWideChar(,,(LPCSTR)szGBKTraditional,strlen(szGBKTraditional),(LPWSTR)pBuffer,nLength);
   pBuffer[nLength]=;

   nResultLength=WideCharToMultiByte(,,pBuffer,nLength,NULL,,m_pszUnknown,FALSE);
   pResult=new char[nResultLength+];
   WideCharToMultiByte(,,(LPWSTR)pBuffer,nLength,(LPSTR)pResult,nResultLength,"  ",FALSE);
   pResult[nResultLength]=;

   return pResult;
 }

 //将GBK的简体转换到GBK繁体
 LPSTR CChineseConvertor::GBKSimplified2GBKTraditional(char * szSimplified)
 {
   LCID dwLocale;
   WORD wLangID;
   wLangID=MAKELANGID(LANG_CHINESE,SUBLANG_CHINESE_SIMPLIFIED);
   dwLocale=MAKELCID(wLangID,SORT_CHINESE_PRC);

   int nLength;
   char *pBuffer;
   nLength=LCMapStringA(dwLocale,LCMAP_TRADITIONAL_CHINESE,(LPCSTR)szSimplified,strlen(szSimplified),NULL,);
   pBuffer=new char[nLength+];
   pBuffer[nLength]=;
   LCMapStringA(dwLocale,LCMAP_TRADITIONAL_CHINESE,(LPCSTR)szSimplified,strlen(szSimplified),pBuffer,nLength);
   return pBuffer;
 }

 // 转换到Unicode
 LPWSTR CChineseConvertor::ToUnicode(char * szSource, int nEncoding)
 {
   int nLength;
   wchar_t *pBuffer;
   int nLanguage;

   if(nEncoding==CHINESE_SIMPLIFIED)
     nLanguage=;
   else
     if(nEncoding==CHINESE_TRADITIONAL)
       nLanguage=;
     else
       nLanguage= CP_ACP;

   nLength=MultiByteToWideChar(nLanguage,,szSource,strlen(szSource),NULL,);
   pBuffer=new wchar_t[nLength+];
   MultiByteToWideChar(nLanguage,,(LPCSTR)szSource,strlen(szSource),(LPWSTR)pBuffer,nLength);
   pBuffer[nLength]=;

   return pBuffer;
 }

 //转换到多字节
 LPSTR CChineseConvertor::ToMultiByte(LPCWSTR szSource, int nEncoding)
 {
   int nLength;
   char *pBuffer;
   int nLanguage;

   if(nEncoding==CHINESE_SIMPLIFIED)
     nLanguage=;
   else
     if(nEncoding==CHINESE_TRADITIONAL)
       nLanguage=;
     else
       nLanguage= CP_ACP;

   nLength=WideCharToMultiByte(nLanguage,,szSource,wcslen(szSource),NULL,,m_pszUnknown,FALSE);

   pBuffer=new char[nLength+];
   WideCharToMultiByte(nLanguage,,szSource,wcslen(szSource),pBuffer,nLength,m_pszUnknown,FALSE);
   pBuffer[nLength]=;

   return pBuffer;

 }

 //UTF8转换到UNICODE
 LPWSTR CChineseConvertor::UTF82UNICODE(char*   utf8str)
 {
     int nLength;
     wchar_t *pBuffer;

     nLength=MultiByteToWideChar(CP_UTF8,,utf8str,strlen(utf8str),NULL,);
     pBuffer=new wchar_t[nLength+];
     MultiByteToWideChar(CP_UTF8,,(LPCSTR)utf8str,strlen(utf8str),(LPWSTR)pBuffer,nLength);
     pBuffer[nLength]=;

     return pBuffer;
 }

 //UNICODE转换到UTF8
 LPSTR CChineseConvertor::UNICODE2UTF8(LPCWSTR  strText)
 {
     int len;
     len = WideCharToMultiByte(CP_UTF8, , (LPCWSTR)strText, -, NULL, , NULL, NULL);
     char *szUtf8=new char[*(len + )];
     memset(szUtf8, , len *  + );  //UTF8最多的字节数最多是一个UINICODE字符所占字节数的两倍
     WideCharToMultiByte (CP_UTF8, , (LPCWSTR)strText, -, szUtf8, len, NULL,NULL);
     return szUtf8;

 }