QWORD HexStringToNumber( LPCSTR str )
{
#define IsHexNumber( c ) ( ( c >= '0'&& c <= '9' ) || ( c >= 'A'&& c <= 'F' ) || ( c >= 'a'&& c <= 'f' ) )
#define GetHexNumber( c ) ( ( c >= '0'&& c <= '9' ) ? ( c - '0' ) : ( 10 + ( ( c >= 'A'&& c <= 'F' ) ? ( c - 'A' ) : ( c - 'a' ) ) ) )
if ( str == NULL )
return 0;
QWORD result = 0;
if ( str[0] == '0' && str[1] == 'x' )
str += 2;
for ( int i = 0; i < 16; i ++ )
{
if ( !IsHexNumber( str[i] ) )
break;
result = ( result << 4 ) | GetHexNumber( str[i] );
}
#undef GetHexNumber
#undef IsHexNumber
return result;
}
CString TCCFrm::FrmGetFormatedColorFromEdit()
{
TCHAR szColor[7];
::GetWindowText(m_hEditColor, szColor, 7);
if (!IsHexNumber(szColor))
{
::_tcscpy_s(szColor, -1, _T("FFFFFF"));
}
int iLen = ::_tcslen(szColor);
CString strColor(szColor);
strColor.MakeUpper();
for (int i = 0; i < 6 - iLen; i ++)
{
strColor = _T("0") + strColor;
}
return strColor;
}
bool IsHexNumber( const char* str, size_t len )
{
// skip sign if there is one
if( 1 >= len )
{
if( '-' == str[0]
|| '+' == str[0] )
{
str += 1;
len -= 1;
}
}
// skip "0x" or "0X" prefix if there is one
if( 2 >= len )
{
if( '0' == str[0]
&& ( 'x' == str[1]
|| 'X' == str[1] ) )
{
str += 2;
len -= 2;
}
}
if( 0 == len )
return false;
for(; len > 0; ++str, --len)
{
if( !IsHexNumber( *str ) )
return false;
}
return true;
}
bool IsHexNumber( const std::string& str )
{
return IsHexNumber( str.c_str(), str.length() );
}
