字符串编码之间的转换（GB2312<->UTF8<->Unicode）及URLEncoding .

分手后的思念是犯贱 2022-08-10 09:26 173阅读 0赞

LPWSTR GB2312ToUnicode(LPCSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	WCHAR* pBuf = NULL;
    	int nLen = MultiByteToWideChar(CP_ACP, 0, lpszInBuf, -1, pBuf, 0);
    	pBuf = new WCHAR[nLen];
    	memset(pBuf, 0, sizeof(WCHAR) * nLen);
    	MultiByteToWideChar(CP_ACP, 0, lpszInBuf, -1, pBuf, nLen);
    	return pBuf;
    }
    
    LPSTR UnicodeToGB2312(LPCWSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	CHAR* pBuf = NULL;
    	int nLen = WideCharToMultiByte(CP_ACP, 0, lpszInBuf, -1, pBuf, 0, NULL, NULL);
    	pBuf = new CHAR[nLen];
    	memset(pBuf, 0, sizeof(CHAR) * nLen);
    	WideCharToMultiByte(CP_ACP, 0, lpszInBuf, -1, pBuf, nLen, NULL, NULL);
    	return pBuf;
    }
    
    LPWSTR UTF8ToUnicode(LPCSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	WCHAR* pBuf = NULL;
    	int nLen = MultiByteToWideChar(CP_UTF8, 0, lpszInBuf, -1, pBuf, 0);
    	pBuf = new WCHAR[nLen];
    	memset(pBuf, 0, sizeof(WCHAR) * nLen);
    	MultiByteToWideChar(CP_UTF8, 0, lpszInBuf, -1, pBuf, nLen);
    	return pBuf;
    }
    
    LPSTR UnicodeToUTF8(LPCWSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	CHAR* pBuf =NULL;
    	int nLen = WideCharToMultiByte(CP_UTF8, 0, lpszInBuf, -1, pBuf, 0, NULL, NULL);
    	pBuf = new CHAR[nLen];
    	memset(pBuf, 0, sizeof(CHAR) * nLen);
    	WideCharToMultiByte(CP_UTF8, 0, lpszInBuf, -1, pBuf, nLen, NULL, NULL);
    	return pBuf;
    }
    
    LPSTR GB2312ToUTF8(LPCSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	LPWSTR lpszTmp = GB2312ToUnicode(lpszInBuf);
    	LPSTR lpszBuf = UnicodeToUTF8(lpszTmp);
    	delete[] lpszTmp;
    	lpszTmp = NULL;
    	return lpszBuf;
    }
    
    LPSTR UTF8ToGB2312(LPCSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	LPWSTR lpszTmp = UTF8ToUnicode(lpszInBuf);
    	LPSTR lpszBuf = UnicodeToGB2312(lpszTmp);
    	delete[] lpszTmp;
    	lpszTmp = NULL;
    	return lpszBuf;
    }
    
    LPSTR GB2312Encoding(LPCSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	const int nLen = strlen(lpszInBuf) * 3 + 1;
    	CHAR* pBuf = new CHAR[nLen];
    	memset(pBuf, 0, sizeof(CHAR) * nLen);
    	CHAR szTmp[4] = {0};
    	for(int i = 0; i != strlen(lpszInBuf); ++i)
    	{
    		if(IsDBCSLeadByte(lpszInBuf[i]))
    		{
    			sprintf_s(szTmp, _countof(szTmp), "%%%02X", lpszInBuf[i] & 0xFF);
    		}
    		else
    		{
    			sprintf_s(szTmp, _countof(szTmp), "%c", lpszInBuf[i]);
    		}
    		sprintf_s(pBuf + strlen(pBuf), nLen - strlen(pBuf), "%s", szTmp);
    	}
    	return pBuf;
    }
    
    LPSTR UTF8Encoding(LPCSTR lpszInBuf)
    {
    	if(NULL == lpszInBuf)
    	{
    		return NULL;
    	}
    	const int nLen = strlen(lpszInBuf) * 3 + 1;
    	CHAR* pBuf = new CHAR[nLen];
    	memset(pBuf, 0, sizeof(CHAR) * nLen);
    	CHAR szTmp[4] = {0};
    	for(int i = 0; i != strlen(lpszInBuf); ++i)
    	{
    		if(IsDBCSLeadByte(lpszInBuf[i]))
    		{
    			sprintf_s(szTmp, _countof(szTmp), "%%%02X", lpszInBuf[i] & 0xFF);
    		}
    		else
    		{
    			sprintf_s(szTmp, _countof(szTmp), "%c", lpszInBuf[i]);
    		}
    		sprintf_s(pBuf + strlen(pBuf), nLen - strlen(pBuf), "%s", szTmp);
    	}
    	return pBuf;
    }
    
    // 测试代码
    #include "stdafx.h"
    #include <Windows.h>
    #include <strsafe.h>
    
    int _tmain(int argc, _TCHAR* argv[])
    {
    	CHAR szText[] = "百度Hi";
    	CHAR* pBuf = GB2312Encoding(szText);
    	MessageBoxA(NULL, pBuf, NULL, 0);
    	delete[] pBuf;
    	pBuf = NULL;
    	return 0;
    }

转： [http://blog.csdn.net/visualeleven/article/details/8121932][http_blog.csdn.net_visualeleven_article_details_8121932]

[http_blog.csdn.net_visualeleven_article_details_8121932]: http://blog.csdn.net/visualeleven/article/details/8121932