chinesecodelib.cpp

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// ChineseCodeLib.cpp: implementation of the CChineseCodeLib class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "SmsSend.h"
#include "ChineseCodeLib.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CChineseCodeLib::CChineseCodeLib()
{

}

CChineseCodeLib::~CChineseCodeLib()
{

}
// 把UTF-8转换成Unicode
void CChineseCodeLib::UTF_8ToUnicode(WCHAR* pOut,const char *pText)
{
 char* uchar = (char *)pOut;

 uchar[1] = ((pText[0] & 0x0F) << 4) + ((pText[1] >> 2) & 0x0F);
 uchar[0] = ((pText[1] & 0x03) << 6) + (pText[2] & 0x3F);

 return;
}
// Unicode 转换成UTF-8 
void CChineseCodeLib::UnicodeToUTF_8(char* pOut,const WCHAR* pText)
{
  // 注意 WCHAR高低字的顺序,低字节在前，高字节在后
  char* pchar = (char *)pText;

  pOut[0] = (0xE0 | ((pchar[1] & 0xF0) >> 4));
  pOut[1] = (0x80 | ((pchar[1] & 0x0F) << 2)) + ((pchar[0] & 0xC0) >> 6);
  pOut[2] = (0x80 | (pchar[0] & 0x3F));

  return;
}

// 把Unicode 转换成 GB2312 
void CChineseCodeLib::UnicodeToGB2312(char* pOut,unsigned short uData)
{
 WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(WCHAR),NULL,NULL);
 return;
}     

// GB2312 转换成　Unicode
void CChineseCodeLib::Gb2312ToUnicode(WCHAR* pOut,const char *gbBuffer)
{
 ::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1);
 return;
}

//GB2312 转为 UTF-8
void CChineseCodeLib::GB2312ToUTF_8(CString& pOut,const char *pText, int pLen)
{
   char buf[4];
   char* rst = new char[pLen + (pLen >> 2) + 2];
   
   memset(buf,0,4);
   memset(rst,0,pLen + (pLen >> 2) + 2);
   
   int i = 0;
   int j = 0;      
   while(i < pLen)
   {
           //如果是英文直接复制就可以
           if( *(pText + i) >= 0)
           {
                   rst[j++] = pText[i++];
           }
           else
           {
                   WCHAR pbuffer;
                   Gb2312ToUnicode(&pbuffer,pText+i);
                   
                   UnicodeToUTF_8(buf,&pbuffer);
                   
                   unsigned short int tmp = 0;
                   tmp = rst[j] = buf[0];
                   tmp = rst[j+1] = buf[1];
                   tmp = rst[j+2] = buf[2];
                   
                   
                   j += 3;
                   i += 2;
           }
   }
   rst[j] = '\0';

   //返回结果
   pOut = rst;             
   delete []rst;   
   
   return;
}

//UTF-8 转为 GB2312
void CChineseCodeLib::UTF_8ToGB2312(CString &pOut,const char *pText, int pLen)
{
 char * newBuf = new char[pLen];
 char Ctemp[4];
 memset(Ctemp,0,4);

 int i =0;
 int j = 0;
 
 while(i < pLen)
 {
        if(pText[i] > 0)
        {
                newBuf[j++] = pText[i++];                       
        }
        else                 
        {
                WCHAR Wtemp;
                UTF_8ToUnicode(&Wtemp,pText + i);
        
                UnicodeToGB2312(Ctemp,Wtemp);
            
                newBuf[j] = Ctemp[0];
                newBuf[j + 1] = Ctemp[1];

                i += 3;    
                j += 2;   
        }
 }
 newBuf[j] = '\0';
 
 pOut = newBuf;
 delete []newBuf;
 
 return; 
}