string.cpp

在mobile 6.0上实现蓝牙通讯

#include "StdAfx.h"

#include "String.h"

CString Data2HexString ( char *data, int size, int nBytesPerLine/*=16*/ )
{
	CString csHexString, csTemp;
	for ( int i=0; i<size; i++ )
	{
		csTemp.Format ( L"%02X ", (BYTE)data[i] );
		csHexString += csTemp;
		if ( (i+1) % nBytesPerLine == 0 )
			csHexString += "\r\n";
	}
	return csHexString;
}

BYTE HexCharToData(TCHAR cChar)
{
	if ( cChar >= _T('0') && cChar <= _T('9') )
		return (BYTE)(cChar-_T('0'));
	if ( cChar >= _T('a') && cChar <= _T('f') )
		return (BYTE)(cChar-_T('a')+0x0a);
	if ( cChar >= _T('A') && cChar <= _T('F') )
		return (BYTE)(cChar-_T('A')+0x0A);
	return 0xff;
}

//
// 将一个16进制的字符串转换为16进制的数，返回数据长度
// 例如：将字符串“61 62 63 64 65 66 67 68”转换成数据 [0x61 0x62 0x63 0x64 0x65 0x66 0x67 0x68]
// 保存到 szOutBuffer 缓冲中
//
int ConvStringToHexData(CString csOrgStr, BYTE *szOutBuffer, int nOutBufferSize)
{
	ASSERT ( szOutBuffer && nOutBufferSize > 0 );
	// 先得到有效的16进制字符串，同时将表示16进制的标志“0x”去掉
	CString csLegalHexStr;
	csOrgStr.MakeLower();
	csOrgStr.Replace ( _T("0x"), _T("") );
	for ( int i=0; i<csOrgStr.GetLength(); i++ )
	{
		TCHAR c = csOrgStr.GetAt (i);
		if ( (c>=_T('0')&&c<=_T('9')) || (c>=_T('a') && c<= _T('f')) )
		{
			csLegalHexStr += c;
		}
	}

	if ( csLegalHexStr.GetLength() < 1 ) return 0;

	// 不是偶数个字符则在后面补“0”
	if ( (csLegalHexStr.GetLength() % 2) != 0 )
		csLegalHexStr += _T("0");

	int j=0;
	for ( int i=0; j<nOutBufferSize && i<csLegalHexStr.GetLength(); i+= 2 )
	{
		BYTE btData = 0;
		BYTE bLo = ( 0x0f & HexCharToData ( csLegalHexStr.GetAt(i+1) ) );
		BYTE bHi = ( 0x0f & HexCharToData ( csLegalHexStr.GetAt(i) ) );
		if ( bLo == 0xff || bHi == 0xff )
			return -1;
		btData = ( bHi << 4 ) | bLo;
		szOutBuffer[j++] = btData;
	}

	return j;
}

//
// 将 lpszOrg 转换为多字节表示的字符串
//
int GetMltiByteChar ( LPCTSTR lpszOrg, OUT char *buf, int size )
{
	if ( !lpszOrg || !buf || size<1 ) return -1;

#ifdef UNICODE
		return WideCharToMultiByte ( CP_ACP, 0, lpszOrg, (int)strlen_s(lpszOrg), (LPSTR)buf, size, NULL, NULL );
#else
		strncpy_s ( buf, lpszOrg, size-1 );
		return strlen_s(buf);
#endif
}

//
// 将 lpszOrg 转换为该程序使用的编码字符串，如果该程序是 UNICODE 就转为 UNICODE，如果是 ANSI 就转为 ANSI 的
//
CString GetCompatibleString ( LPCTSTR lpszOrg, BOOL bOrgIsUncode )
{
	if ( !lpszOrg ) return L"";

#ifdef UNICODE
	if ( bOrgIsUncode ) return lpszOrg;

	int nOrgLen = strlen((const char*)lpszOrg);
	int nWideCount = nOrgLen + 1;
	WCHAR *wchar = new WCHAR[nWideCount];
	if ( !wchar ) return L"";
	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 lpszOrg;

	int nOrgLen = wcslen(lpszOrg);
	int nMultiByteSize = nOrgLen / 2 + 2;
	CString csRet
	GetMltiByteChar ( lpszOrg, csRet.GetBuffer(nMultiByteSize), nMultiByteSize );
	csRet.ReleaseBuffer();
	return csRet;
#endif
}

int hwSnprintf ( LPTSTR buffer, int count, LPCTSTR format, ... )
{
	if ( count < 1 ) return 0;
	ASSERT_ADDRESS ( buffer, count );
	memset ( buffer, 0, count );
	// 格式化
	va_list  va;
	va_start (va, format);
#ifdef UNICODE
	int nRet = _vsnwprintf ( buffer, count, (const wchar_t*)format, va);
#else
	int nRet = _vsnprintf ( buffer, count, (const char*)format, va);
#endif
	va_end(va);
	buffer [count-1] = _T('\0');

	int nLen = nRet;
	if ( nLen < 0 ) nLen = (int)strlen_s(buffer);
	if ( nLen > count ) nLen = count;

	return nLen;
}