78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
/**
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* @file macros.h
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* @brief This file contains miscellaneous helper definitions and functions.
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*/
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#ifndef MACROS_H
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#define MACROS_H
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#include <wx/wx.h>
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/**
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* Macro TO_UTF8
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* converts a wxString to a UTF8 encoded C string for all wxWidgets build modes.
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* wxstring is a wxString, not a wxT() or _(). The scope of the return value
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* is very limited and volatile, but can be used with printf() style functions well.
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* NOTE: Trying to convert it to a function is tricky because of the
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* type of the parameter!
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*/
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#define TO_UTF8( wxstring ) ( (const char*) (wxstring).utf8_str() )
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/**
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* function FROM_UTF8
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* converts a UTF8 encoded C string to a wxString for all wxWidgets build modes.
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*/
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static inline wxString FROM_UTF8( const char* cstring )
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{
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wxString line = wxString::FromUTF8( cstring );
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if( line.IsEmpty() ) // happens when cstring is not a valid UTF8 sequence
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line = wxConvCurrent->cMB2WC( cstring ); // try to use locale conversion
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return line;
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}
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/**
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* Function GetChars
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* returns a wxChar* to the actual character data within a wxString, and is
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* helpful for passing strings to wxString::Printf(wxT("%s"), GetChars(wxString) )
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* <p>
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* wxChar is defined to be
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* <ul>
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* <li> standard C style char when wxUSE_UNICODE==0 </li>
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* <li> wchar_t when wxUSE_UNICODE==1 (the default). </li>
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* </ul>
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* i.e. it depends on how the wxWidgets library was compiled. There was a period
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* during the development of wxWidgets 2.9 when GetData() was missing, so this
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* function was used to provide insulation from that design change. It may
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* no longer be needed, and is harmless. GetData() seems to be an acceptable
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* alternative in all cases now.
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*/
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static inline const wxChar* GetChars( const wxString& s )
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{
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#if wxCHECK_VERSION( 2, 9, 0 )
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return (const wxChar*) s.c_str();
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#else
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return s.GetData();
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#endif
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}
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// This really needs a function? well, it is used *a lot* of times
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template<class T> inline void NEGATE( T &x ) { x = -x; }
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/// # of elements in an array
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#define DIM( x ) unsigned( sizeof(x) / sizeof( (x)[0] ) ) // not size_t
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/// Exchange two values
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// std::swap works only with arguments of the same type (which is saner);
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// here the compiler will figure out what to do (I hope to get rid of
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// this soon or late)
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template<class T, class T2> inline void EXCHG( T& a, T2& b )
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{
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T temp = a;
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a = b;
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b = temp;
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}
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#endif /* ifdef MACRO_H */
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