Conversion between string encodings (Gb2312<->utf8<->unicode) and urlencoding

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;
}

Test code
#include "stdafx.h"
#include <Windows.h>
#include <strsafe.h>

int _tmain (int argc, _tchar* argv[])
{
CHAR sztext[] = "Baidu hi";
char* PBuf = gb2312encoding (Sztext);
MessageBoxA (NULL, PBUF, NULL, 0);
Delete[] PBuf;
PBuf = NULL;
return 0;
}

Conversion between string encodings (Gb2312<->utf8<->unicode) and urlencoding