// stdafx.cpp : 只包括標準包含文件的源文件
// GPRSDemo.pch 將作為預編譯頭
// stdafx.obj 將包含預編譯類型信息

#include "stdafx.h"



//
// 將字符串 lpszOrg 轉換為多字節的字符串，如果還要使用多字符串的長度，可以用以下方式來使用這個類：
// CMultiByteString MultiByteString(_T("UNICODE字符串"));
// printf ( "ANSI 字符串為： %s， 長度為： %d 字節\n", MultiByteString.GetBuffer(), MultiByteString.GetLength() );
//
CMultiByteString::CMultiByteString( LPCTSTR lpszOrg, int nOrgStringEncodeType/*=STRING_IS_SOFTCODE*/, OUT char *buf/*=NULL*/, int size/*=0*/, OUT int *pnCount/*=NULL*/ )
{
	m_bNewBuffer = FALSE;
	m_pszData = "";
	if ( !lpszOrg ) return;

	int nCount = 0;
	BOOL bOrgIsUncode = FALSE;
	if ( nOrgStringEncodeType == STRING_IS_MULTICHARS ) bOrgIsUncode = FALSE;
	else if ( nOrgStringEncodeType == STRING_IS_UNICODE ) bOrgIsUncode = TRUE;
	else
	{
#ifdef UNICODE
		bOrgIsUncode = TRUE;
#else
		bOrgIsUncode = FALSE;
#endif
	}


	if ( buf && size > 0 )
	{
		m_pszData = buf;
	}
	else
	{
		int nLen = 0;
		if ( bOrgIsUncode ) nLen = (int)wcslen((WCHAR*)lpszOrg) * 2 + sizeof(WCHAR);
		else nLen = (int)strlen((const char*)lpszOrg) + sizeof(char);
		m_pszData = new char[nLen];
		if ( !m_pszData )
		{
			::AfxThrowMemoryException ();
			return;
		}
		size = nLen;
		m_bNewBuffer = TRUE;
	}
	memset ( m_pszData, 0, size );

	if ( bOrgIsUncode )
	{
		nCount = WideCharToMultiByte ( CP_ACP, 0, lpszOrg, (int)lstrlen(lpszOrg), (LPSTR)m_pszData, size, NULL, NULL );
	}
	else
	{
		nCount = (int)strlen((const char*)lpszOrg);
		nCount = __min(nCount,size);
		memcpy ( m_pszData, lpszOrg, nCount );
	}

	if ( pnCount ) *pnCount = nCount;
}

CMultiByteString::~CMultiByteString ()
{
	if ( m_bNewBuffer && m_pszData )
	{
		delete[] m_pszData;
	}
}

//
// 將 lpszOrg 轉換為該程序使用的編碼字符串，如果該程序是 UNICODE 就轉為 UNICODE，如果是 ANSI 就轉為 ANSI 的
//
CString GetCompatibleString ( LPVOID lpszOrg, BOOL bOrgIsUncode )
{
	if ( !lpszOrg ) return _T("");

#ifdef UNICODE
	if ( bOrgIsUncode ) return (LPCTSTR)lpszOrg;

	int nOrgLen = (int)strlen((const char*)lpszOrg);
	int nWideCount = nOrgLen + 1;
	WCHAR *wchar = new WCHAR[nWideCount];
	if ( !wchar ) return _T("");
	memset ( wchar, 0, nWideCount*sizeof(WCHAR) );
	MultiByteToWideChar(CP_ACP, 0, (LPCSTR)lpszOrg, nOrgLen, wchar, nWideCount);
	CString csRet = wchar;
	delete[] wchar;
	return csRet;
#else
	if ( !bOrgIsUncode ) return (LPCTSTR)lpszOrg;

	int nOrgLen = (int)strlen((LPCTSTR)lpszOrg);
	int nMultiByteSize = nOrgLen / sizeof(WCHAR) + 2;
	CString csRet;
	CMultiByteString ( (LPCTSTR)lpszOrg, csRet.GetBuffer(nMultiByteSize), nMultiByteSize, 1 );
	csRet.ReleaseBuffer();
	return csRet;
#endif
}