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101 lines
3.2 KiB
101 lines
3.2 KiB
/**
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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 wxChar* data within a wxString, and is
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* helpful for passing strings to wxString::Printf() and wxString::Format().
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* It can also be passed a UTF8 parameter which will be converted to wxString
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* by the compiler.
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* <p>
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* Example: wxString::Format( wxT( "%s" ), GetChars( UTF( "some text" ) ) );
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* <p>
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* When wxWidgets is properly built for KiCad, a const wxChar* points to either:
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* <ul>
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* <li> 32 bit unicode characters on linux/OSX or </li>
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* <li> 16 bit UTF16 characters on windows. </li>
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* </ul>
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* Note that you cannot pass 8 bit strings to wxString::Format() or Printf() so this
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* is a useful conversion function to wxChar*, which is needed by wxString::Format().
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*
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* @return const wxChar* - a pointer to the UNICODE or UTF16 (on windows) text.
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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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/**
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* Function Clamp
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* limits @a value within the range @a lower <= @a value <= @a upper. It will work
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* on temporary expressions, since they are evaluated only once, and it should work
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* on most if not all numeric types, string types, or any type for which "operator < ()"
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* is present. The arguments are accepted in this order so you can remember the
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* expression as a memory aid:
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* <p>
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* result is: lower <= value <= upper
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*/
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template <typename T> inline const T& Clamp( const T& lower, const T& value, const T& upper )
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{
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wxASSERT( lower <= upper );
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if( value < lower )
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return lower;
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else if( upper < value )
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return upper;
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return value;
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}
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#endif /* ifdef MACRO_H */
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