下面的这部分程序是UDP接收程序,现在的情况是如果去掉下面程序中的delete pResult;第一次接收没有问题,但是如果第二次接收的长度比第一次小,多余的部分还是第一次的多余部分,应该是第一次的没释放,但如果delete了,就是乱码,我现在是Unicode编码方式。求高手帮忙,急 SOCKADDR_IN addrFrom;
int len=sizeof(SOCKADDR); char recvBuf[2000]; int retval;
while(TRUE)
{
retval=recvfrom(sock,recvBuf,2000,0,(SOCKADDR*)&addrFrom,&len); if(SOCKET_ERROR==retval)
break;
int nLen = WideCharToMultiByte( CP_ACP, 0, (wchar_t*)recvBuf, -1, NULL, 0, NULL, NULL );
if (nLen == 0)
{
return 0;
}
char* pResult = new char[nLen];
WideCharToMultiByte( CP_ACP, 0, (wchar_t*)recvBuf, -1, pResult, nLen, NULL, NULL ); ::PostMessage(hwnd, WM_RECVDATA1,0,(LPARAM)pResult); delete pResult;
}
int len=sizeof(SOCKADDR); char recvBuf[2000]; int retval;
while(TRUE)
{
retval=recvfrom(sock,recvBuf,2000,0,(SOCKADDR*)&addrFrom,&len); if(SOCKET_ERROR==retval)
break;
int nLen = WideCharToMultiByte( CP_ACP, 0, (wchar_t*)recvBuf, -1, NULL, 0, NULL, NULL );
if (nLen == 0)
{
return 0;
}
char* pResult = new char[nLen];
WideCharToMultiByte( CP_ACP, 0, (wchar_t*)recvBuf, -1, pResult, nLen, NULL, NULL ); ::PostMessage(hwnd, WM_RECVDATA1,0,(LPARAM)pResult); delete pResult;
}
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--->
::SendMessage(hwnd, WM_RECVDATA1,0,(LPARAM)pResult);
#pragma once
#include "stdafx.h"
#include "string"
using namespace std;
class CChineseCode
{
public:
static void UTF_8ToUnicode(wchar_t* pOut,char *pText); // 把UTF-8转换成Unicode
static void UnicodeToUTF_8(char* pOut,wchar_t* pText); //Unicode 转换成UTF-8
static void UnicodeToGB2312(char* pOut,wchar_t uData); // 把Unicode 转换成 GB2312
static void Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer);// GB2312 转换成 Unicode
static void GB2312ToUTF_8(string& pOut,char *pText, int pLen);//GB2312 转为 UTF-8
static void UTF_8ToGB2312(char* pOut, char *pText, int pLen);//UTF-8 转为 GB2312
}; #include ".\chinesecode.h"void CChineseCode::UTF_8ToUnicode(wchar_t* pOut,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;
}void CChineseCode::UnicodeToUTF_8(char* pOut,wchar_t* 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;
}void CChineseCode::UnicodeToGB2312(char* pOut,wchar_t uData)
{
WideCharToMultiByte(CP_ACP,NULL,&uData,1,pOut,sizeof(wchar_t),NULL,NULL);
return;
} void CChineseCode::Gb2312ToUnicode(wchar_t* pOut,char *gbBuffer)
{
::MultiByteToWideChar(CP_ACP,MB_PRECOMPOSED,gbBuffer,2,pOut,1);
return ;
}void CChineseCode::GB2312ToUTF_8(string& pOut,char *pText, int pLen)
{
char buf[4];
int nLength = pLen* 3;
char* rst = new char[nLength]; memset(buf,0,4);
memset(rst,0,nLength); 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_t 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;
}void CChineseCode::UTF_8ToGB2312(char* newBuf, char *pText, int 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';
return;
}inline BYTE toHex(const BYTE &x)
{
return x > 9 ? x + 55: x + 48;
}
inline BYTE toByte(const BYTE &x)
{
return x > 57? x - 55: x - 48;
}
CString URLDecode(CString sIn)
{
CString sOut;
const int nLen = sIn.GetLength() + 1;
register LPBYTE pOutTmp = NULL;
LPBYTE pOutBuf = NULL;
register LPBYTE pInTmp = NULL;
LPBYTE pInBuf =(LPBYTE)sIn.GetBuffer(nLen);
//alloc out buffer
pOutBuf = (LPBYTE)sOut.GetBuffer(nLen); if(pOutBuf)
{
pInTmp = pInBuf;
pOutTmp = pOutBuf;
// do encoding
while (*pInTmp)
{
if('%'==*pInTmp)
{
pInTmp++;
*pOutTmp++ = (toByte(*pInTmp)%16<<4) + toByte(*(pInTmp+1))%16;//高4位+低4位
pInTmp++;
}
else if('+'==*pInTmp)
*pOutTmp++ = ' ';
else
*pOutTmp++ = *pInTmp;
pInTmp++;
}
*pOutTmp = '\0';
sOut.ReleaseBuffer();
}
sIn.ReleaseBuffer(); return sOut;
}
CString URLEncode(CString sIn)
{
CString sOut;
const int nLen = sIn.GetLength() + 1;
register LPBYTE pOutTmp = NULL;
LPBYTE pOutBuf = NULL;
register LPBYTE pInTmp = NULL;
LPBYTE pInBuf =(LPBYTE)sIn.GetBuffer(nLen);
//alloc out buffer
pOutBuf = (LPBYTE)sOut.GetBuffer(nLen*3); if(pOutBuf)
{
pInTmp = pInBuf;
pOutTmp = pOutBuf;
// do encoding
while (*pInTmp)
{
if(isalnum(*pInTmp) || '-'==*pInTmp || '_'==*pInTmp || '.'==*pInTmp)
*pOutTmp++ = *pInTmp;
else if(isspace(*pInTmp))
*pOutTmp++ = '+';
else
{
*pOutTmp++ = '%';
*pOutTmp++ = toHex(*pInTmp>>4);//高4位
*pOutTmp++ = toHex(*pInTmp%16);//低4位
}
pInTmp++;
}
*pOutTmp = '\0';
sOut.ReleaseBuffer();
}
sIn.ReleaseBuffer(); return sOut;
}
改成
::SendMessage(hwnd, WM_RECVDATA1,0,(LPARAM)pResult);
还不行吗?
那就要从这个函数的定义功能着手了。