git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47114 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
		
			
				
	
	
		
			453 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
			
		
		
	
	
			453 lines
		
	
	
		
			17 KiB
		
	
	
	
		
			C++
		
	
	
	
	
	
///////////////////////////////////////////////////////////////////////////////
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// Name:        wx/wxcrtvararg.h
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// Purpose:     Type-safe ANSI and Unicode builds compatible wrappers for
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//              printf(), scanf() and related CRT functions
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// Author:      Joel Farley, Ove Kåven
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// Modified by: Vadim Zeitlin, Robert Roebling, Ron Lee
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// Created:     2007-02-19
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// RCS-ID:      $Id$
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// Copyright:   (c) 2007 REA Elektronik GmbH
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// Licence:     wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_WXCRTVARARG_H_
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#define _WX_WXCRTVARARG_H_
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// NB: User code should include wx/crt.h instead of including this
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//     header directly.
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#include "wx/wxcrt.h"
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#include "wx/strvararg.h"
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#include "wx/string.h"
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// ----------------------------------------------------------------------------
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// CRT functions aliases
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// ----------------------------------------------------------------------------
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/* Required for wxPrintf() etc */
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#include <stdarg.h>
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/* printf() family saga */
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/*
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   For some systems [v]snprintf() exists in the system libraries but not in the
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   headers, so we need to declare it ourselves to be able to use it.
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 */
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#if defined(HAVE_VSNPRINTF) && !defined(HAVE_VSNPRINTF_DECL)
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#ifdef __cplusplus
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    extern "C"
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#else
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    extern
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#endif
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    int vsnprintf(char *str, size_t size, const char *format, va_list ap);
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#endif /* !HAVE_VSNPRINTF_DECL */
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#if defined(HAVE_SNPRINTF) && !defined(HAVE_SNPRINTF_DECL)
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#ifdef __cplusplus
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    extern "C"
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#else
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    extern
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#endif
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    int snprintf(char *str, size_t size, const char *format, ...);
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#endif /* !HAVE_SNPRINTF_DECL */
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/* Wrapper for vsnprintf if it's 3rd parameter is non-const. Note: the
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 * same isn't done for snprintf below, the builtin wxSnprintf_ is used
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 * instead since it's already a simple wrapper */
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#if defined __cplusplus && defined HAVE_BROKEN_VSNPRINTF_DECL
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    inline int wx_fixed_vsnprintf(char *str, size_t size, const char *format, va_list ap)
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    {
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        return vsnprintf(str, size, (char*)format, ap);
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    }
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#endif
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/*
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   MinGW MSVCRT has non-standard vswprintf() (for MSVC compatibility
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   presumably) and normally _vsnwprintf() is used instead
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 */
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#if defined(HAVE_VSWPRINTF) && defined(__MINGW32__)
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    #undef HAVE_VSWPRINTF
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#endif
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#if wxUSE_PRINTF_POS_PARAMS
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    /*
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        The systems where vsnprintf() supports positional parameters should
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        define the HAVE_UNIX98_PRINTF symbol.
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        On systems which don't (e.g. Windows) we are forced to use
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        our wxVsnprintf() implementation.
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    */
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    #if defined(HAVE_UNIX98_PRINTF)
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        #ifdef HAVE_VSWPRINTF
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            #define wxCRT_VsnprintfW   vswprintf
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        #endif
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        #ifdef HAVE_BROKEN_VSNPRINTF_DECL
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            #define wxCRT_VsnprintfA    wx_fixed_vsnprintf
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        #else
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            #define wxCRT_VsnprintfA    vsnprintf
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        #endif
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    #else /* !HAVE_UNIX98_PRINTF */
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        /*
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            The only compiler with positional parameters support under Windows
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            is VC++ 8.0 which provides a new xxprintf_p() functions family.
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            The 2003 PSDK includes a slightly earlier version of VC8 than the
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            main release and does not have the printf_p functions.
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         */
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        #if defined _MSC_FULL_VER && _MSC_FULL_VER >= 140050727 && !defined __WXWINCE__
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            #define wxCRT_VsnprintfA    _vsprintf_p
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            #define wxCRT_VsnprintfW    _vswprintf_p
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        #endif
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    #endif /* HAVE_UNIX98_PRINTF/!HAVE_UNIX98_PRINTF */
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#else /* !wxUSE_PRINTF_POS_PARAMS */
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    /*
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       We always want to define safe snprintf() function to be used instead of
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       sprintf(). Some compilers already have it (or rather vsnprintf() which
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       we really need...), otherwise we implement it using our own printf()
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       code.
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       We define function with a trailing underscore here because the real one
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       is a wrapper around it as explained below
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     */
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    #if defined(__VISUALC__) || \
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            (defined(__BORLANDC__) && __BORLANDC__ >= 0x540)
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        #define wxCRT_VsnprintfA    _vsnprintf
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        #define wxCRT_VsnprintfW    _vsnwprintf
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    #else
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        #if defined(HAVE__VSNWPRINTF)
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            #define wxCRT_VsnprintfW    _vsnwprintf
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        #elif defined(HAVE_VSWPRINTF)
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            #define wxCRT_VsnprintfW     vswprintf
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        #elif defined(__WATCOMC__)
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            #define wxCRT_VsnprintfW    _vsnwprintf
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        #endif
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        /*
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           All versions of CodeWarrior supported by wxWidgets apparently
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           have both snprintf() and vsnprintf()
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         */
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        #if defined(HAVE_VSNPRINTF) \
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            || defined(__MWERKS__) || defined(__WATCOMC__)
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            #ifdef HAVE_BROKEN_VSNPRINTF_DECL
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                #define wxCRT_VsnprintfA    wx_fixed_vsnprintf
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            #else
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                #define wxCRT_VsnprintfA    vsnprintf
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            #endif
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        #endif
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    #endif
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#endif /* wxUSE_PRINTF_POS_PARAMS/!wxUSE_PRINTF_POS_PARAMS */
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#ifndef wxCRT_VsnprintfW
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    /* no (suitable) vsnprintf(), cook our own */
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    WXDLLIMPEXP_BASE int
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    wxCRT_VsnprintfW(wchar_t *buf, size_t len, const wchar_t *format, va_list argptr);
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    #define wxUSE_WXVSNPRINTFW 1
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#else
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    #define wxUSE_WXVSNPRINTFW 0
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#endif
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#ifndef wxCRT_VsnprintfA
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        /* no (suitable) vsnprintf(), cook our own */
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        WXDLLIMPEXP_BASE int
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        wxCRT_VsnprintfA(char *buf, size_t len, const char *format, va_list argptr);
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        #define wxUSE_WXVSNPRINTFA 1
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#else
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        #define wxUSE_WXVSNPRINTFA 0
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#endif
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// for wxString code, define wxUSE_WXVSNPRINTF to indicate that wx
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// implementation is used no matter what (in UTF-8 build, either *A or *W
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// version may be called):
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#if !wxUSE_UNICODE
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    #define wxUSE_WXVSNPRINTF wxUSE_WXVSNPRINTFA
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#elif wxUSE_UNICODE_WCHAR
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    #define wxUSE_WXVSNPRINTF wxUSE_WXVSNPRINTFW
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#elif wxUSE_UTF8_LOCALE_ONLY
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    #define wxUSE_WXVSNPRINTF wxUSE_WXVSNPRINTFA
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#else // UTF-8 under any locale
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    #define wxUSE_WXVSNPRINTF (wxUSE_WXVSNPRINTFA && wxUSE_WXVSNPRINTFW)
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#endif
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#define wxCRT_FprintfA       fprintf
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#define wxCRT_PrintfA        printf
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#define wxCRT_VfprintfA      vfprintf
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#define wxCRT_VprintfA       vprintf
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#define wxCRT_VsprintfA      vsprintf
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#define  wxCRT_FprintfW      fwprintf
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#define  wxCRT_PrintfW       wprintf
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#define  wxCRT_VfprintfW     vfwprintf
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#define  wxCRT_VprintfW      vwprintf
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#if defined(__WINDOWS__) && !defined(HAVE_VSWPRINTF)
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// only non-standard vswprintf() without buffer size argument can be used here
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#define  wxCRT_VsprintfW     vswprintf
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#endif
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/*
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   In Unicode mode we need to have all standard functions such as wprintf() and
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   so on but not all systems have them so use our own implementations in this
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   case.
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 */
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#if wxUSE_UNICODE && !defined(wxHAVE_TCHAR_SUPPORT) && !defined(HAVE_WPRINTF)
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    #define wxNEED_WPRINTF
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#endif
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#if defined(wxNEED_WPRINTF)
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    /*
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        we need to implement all wide character printf functions either because
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        we don't have them at all or because they don't have the semantics we
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        need
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     */
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    int wxCRT_PrintfW( const wchar_t *format, ... );
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    int wxCRT_FprintfW( FILE *stream, const wchar_t *format, ... );
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    int wxCRT_VfprintfW( FILE *stream, const wchar_t *format, va_list ap );
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    int wxCRT_VprintfW( const wchar_t *format, va_list ap );
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    int wxCRT_VsprintfW( wchar_t *str, const wchar_t *format, va_list ap );
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#endif /* wxNEED_WPRINTF */
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/* Required for wxScanf() etc. */
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#define wxCRT_ScanfA     scanf
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#define wxCRT_SscanfA    sscanf
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#define wxCRT_FscanfA    fscanf
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#define wxCRT_VsscanfA   vsscanf
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#if defined(wxNEED_WPRINTF)
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    int wxCRT_ScanfW(const wchar_t *format, ...);
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    int wxCRT_SscanfW(const wchar_t *str, const wchar_t *format, ...);
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    int wxCRT_FscanfW(FILE *stream, const wchar_t *format, ...);
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    int wxCRT_VsscanfW(const wchar_t *str, const wchar_t *format, va_list ap);
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#else
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    #define wxCRT_ScanfW     wscanf
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    #define wxCRT_SscanfW    swscanf
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    #define wxCRT_FscanfW    fwscanf
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    #define wxCRT_VsscanfW   vswscanf
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#endif
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// ----------------------------------------------------------------------------
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// user-friendly wrappers to CRT functions
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// ----------------------------------------------------------------------------
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#ifdef __WATCOMC__
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    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
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    #define wxPrintf    wxPrintf_Impl
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    #define wxFprintf   wxFprintf_Impl
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    #define wxSprintf   wxSprintf_Impl
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    #define wxSnprintf  wxSnprintf_Impl
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#endif
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    // FIXME-UTF8: remove this
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#if wxUSE_UNICODE
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    #define wxCRT_PrintfNative wxCRT_PrintfW
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    #define wxCRT_FprintfNative wxCRT_FprintfW
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#else
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    #define wxCRT_PrintfNative wxCRT_PrintfA
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    #define wxCRT_FprintfNative wxCRT_FprintfA
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#endif
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WX_DEFINE_VARARG_FUNC(int, wxPrintf, 1, (const wxFormatString&),
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                      wxCRT_PrintfNative, wxCRT_PrintfA)
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WX_DEFINE_VARARG_FUNC(int, wxFprintf, 2, (FILE*, const wxFormatString&),
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                      wxCRT_FprintfNative, wxCRT_FprintfA)
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// va_list versions of printf functions simply forward to the respective
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// CRT function; note that they assume that va_list was created using
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// wxArgNormalizer<T>!
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#if wxUSE_UNICODE_UTF8
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    #if wxUSE_UTF8_LOCALE_ONLY
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        #define WX_VARARG_VFOO_IMPL(args, implW, implA)              \
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            return implA args
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    #else
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        #define WX_VARARG_VFOO_IMPL(args, implW, implA)              \
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            if ( wxLocaleIsUtf8 ) return implA args;                 \
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            else return implW args
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    #endif
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#elif wxUSE_UNICODE_WCHAR
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    #define WX_VARARG_VFOO_IMPL(args, implW, implA)                  \
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        return implW args
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#else // ANSI
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    #define WX_VARARG_VFOO_IMPL(args, implW, implA)                  \
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        return implA args
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#endif
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inline int
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wxVprintf(const wxString& format, va_list ap)
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{
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    WX_VARARG_VFOO_IMPL((wxFormatString(format), ap),
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                        wxCRT_VprintfW, wxCRT_VprintfA);
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}
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inline int
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wxVfprintf(FILE *f, const wxString& format, va_list ap)
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{
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    WX_VARARG_VFOO_IMPL((f, wxFormatString(format), ap),
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                        wxCRT_VfprintfW, wxCRT_VfprintfA);
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}
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#undef WX_VARARG_VFOO_IMPL
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// wxSprintf() and friends have to be implemented in two forms, one for
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// writing to char* buffer and one for writing to wchar_t*:
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#if !wxUSE_UTF8_LOCALE_ONLY
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int WXDLLIMPEXP_BASE wxDoSprintfWchar(char *str, const wxChar *format, ...);
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#endif
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#if wxUSE_UNICODE_UTF8
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int WXDLLIMPEXP_BASE wxDoSprintfUtf8(char *str, const char *format, ...);
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#endif
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WX_DEFINE_VARARG_FUNC(int, wxSprintf, 2, (char*, const wxFormatString&),
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                      wxDoSprintfWchar, wxDoSprintfUtf8)
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int WXDLLIMPEXP_BASE
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wxVsprintf(char *str, const wxString& format, va_list argptr);
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#if !wxUSE_UTF8_LOCALE_ONLY
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int WXDLLIMPEXP_BASE wxDoSnprintfWchar(char *str, size_t size, const wxChar *format, ...);
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#endif
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#if wxUSE_UNICODE_UTF8
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int WXDLLIMPEXP_BASE wxDoSnprintfUtf8(char *str, size_t size, const char *format, ...);
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#endif
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WX_DEFINE_VARARG_FUNC(int, wxSnprintf, 3, (char*, size_t, const wxFormatString&),
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                      wxDoSnprintfWchar, wxDoSnprintfUtf8)
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int WXDLLIMPEXP_BASE
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wxVsnprintf(char *str, size_t size, const wxString& format, va_list argptr);
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#if wxUSE_UNICODE
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#if !wxUSE_UTF8_LOCALE_ONLY
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int WXDLLIMPEXP_BASE wxDoSprintfWchar(wchar_t *str, const wxChar *format, ...);
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#endif
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#if wxUSE_UNICODE_UTF8
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int WXDLLIMPEXP_BASE wxDoSprintfUtf8(wchar_t *str, const char *format, ...);
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#endif
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WX_DEFINE_VARARG_FUNC(int, wxSprintf, 2, (wchar_t*, const wxFormatString&),
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                      wxDoSprintfWchar, wxDoSprintfUtf8)
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int WXDLLIMPEXP_BASE
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wxVsprintf(wchar_t *str, const wxString& format, va_list argptr);
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#if !wxUSE_UTF8_LOCALE_ONLY
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int WXDLLIMPEXP_BASE wxDoSnprintfWchar(wchar_t *str, size_t size, const wxChar *format, ...);
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#endif
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#if wxUSE_UNICODE_UTF8
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int WXDLLIMPEXP_BASE wxDoSnprintfUtf8(wchar_t *str, size_t size, const char *format, ...);
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#endif
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WX_DEFINE_VARARG_FUNC(int, wxSnprintf, 3, (wchar_t*, size_t, const wxFormatString&),
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                      wxDoSnprintfWchar, wxDoSnprintfUtf8)
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int WXDLLIMPEXP_BASE
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wxVsnprintf(wchar_t *str, size_t size, const wxString& format, va_list argptr);
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#endif // wxUSE_UNICODE
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#ifdef __WATCOMC__
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    // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
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    //
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    // fortunately, OpenWatcom implements __VA_ARGS__, so we can provide macros
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    // that cast the format argument to wxString:
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    #undef wxPrintf
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    #undef wxFprintf
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    #undef wxSprintf
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    #undef wxSnprintf
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    #define wxPrintf(fmt, ...) \
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            wxPrintf_Impl(wxFormatString(fmt), __VA_ARGS__)
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    #define wxFprintf(f, fmt, ...) \
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            wxFprintf_Impl(f, wxFormatString(fmt), __VA_ARGS__)
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    #define wxSprintf(s, fmt, ...) \
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            wxSprintf_Impl(s, wxFormatString(fmt), __VA_ARGS__)
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    #define wxSnprintf(s, n, fmt, ...) \
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            wxSnprintf_Impl(s, n, wxFormatString(fmt), __VA_ARGS__)
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#endif // __WATCOMC__
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// We can't use wxArgNormalizer<T> for variadic arguments to wxScanf() etc.
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// because they are writable, so instead of providing friendly template
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// vararg-like functions, we just provide both char* and wchar_t* variants
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// of these functions. The type of output variadic arguments for %s must match
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// the type of 'str' and 'format' arguments.
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//
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// For compatibility with earlier wx versions, we also provide wxSscanf()
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// version with the first argument (input string) wxString; for this version,
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// the type of output string values is determined by the type of format string
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// only.
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#define _WX_SCANFUNC_EXTRACT_ARGS_1(x)   x
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#define _WX_SCANFUNC_EXTRACT_ARGS_2(x,y) x, y
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#define _WX_SCANFUNC_EXTRACT_ARGS(N, args) _WX_SCANFUNC_EXTRACT_ARGS_##N args
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#define _WX_VARARG_PASS_WRITABLE(i) a##i
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#define _WX_DEFINE_SCANFUNC(N, dummy1, name, impl, passfixed, numfixed, fixed)\
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    template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)>                            \
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    int name(_WX_SCANFUNC_EXTRACT_ARGS(numfixed, fixed),                      \
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             _WX_VARARG_JOIN(N, _WX_VARARG_ARG))                              \
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    {                                                                         \
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        return  impl(_WX_SCANFUNC_EXTRACT_ARGS(numfixed, passfixed),          \
 | 
						|
                     _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WRITABLE));           \
 | 
						|
    }
 | 
						|
 | 
						|
#define WX_DEFINE_SCANFUNC(name, numfixed, fixed, impl, passfixed)            \
 | 
						|
    inline int name(_WX_SCANFUNC_EXTRACT_ARGS(numfixed, fixed))               \
 | 
						|
    {                                                                         \
 | 
						|
        return impl(_WX_SCANFUNC_EXTRACT_ARGS(numfixed, passfixed));          \
 | 
						|
    }                                                                         \
 | 
						|
    _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS,                                      \
 | 
						|
                    _WX_DEFINE_SCANFUNC,                                      \
 | 
						|
                    dummy1, name, impl, passfixed, numfixed, fixed)
 | 
						|
 | 
						|
// this is needed to normalize the format string, see src/common/strvararg.cpp
 | 
						|
// for more details
 | 
						|
#ifdef __WINDOWS__
 | 
						|
    #define wxScanfConvertFormatW(fmt) fmt
 | 
						|
#else
 | 
						|
    const wxWCharBuffer
 | 
						|
    WXDLLIMPEXP_BASE wxScanfConvertFormatW(const wchar_t *format);
 | 
						|
#endif
 | 
						|
 | 
						|
WX_DEFINE_SCANFUNC(wxScanf, 1, (const char *format),
 | 
						|
                   wxCRT_ScanfA, (format))
 | 
						|
WX_DEFINE_SCANFUNC(wxScanf, 1, (const wchar_t *format),
 | 
						|
                   wxCRT_ScanfW, (wxScanfConvertFormatW(format)))
 | 
						|
 | 
						|
WX_DEFINE_SCANFUNC(wxFscanf, 2, (FILE *stream, const char *format),
 | 
						|
                   wxCRT_FscanfA, (stream, format))
 | 
						|
WX_DEFINE_SCANFUNC(wxFscanf, 2, (FILE *stream, const wchar_t *format),
 | 
						|
                   wxCRT_FscanfW, (stream, wxScanfConvertFormatW(format)))
 | 
						|
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const char *str, const char *format),
 | 
						|
                   wxCRT_SscanfA, (str, format))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wchar_t *str, const wchar_t *format),
 | 
						|
                   wxCRT_SscanfW, (str, wxScanfConvertFormatW(format)))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxCharBuffer& str, const char *format),
 | 
						|
                   wxCRT_SscanfA, (str.data(), format))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxWCharBuffer& str, const wchar_t *format),
 | 
						|
                   wxCRT_SscanfW, (str.data(), wxScanfConvertFormatW(format)))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxString& str, const char *format),
 | 
						|
                   wxCRT_SscanfA, (str.mb_str(), format))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxString& str, const wchar_t *format),
 | 
						|
                   wxCRT_SscanfW, (str.wc_str(), wxScanfConvertFormatW(format)))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxCStrData& str, const char *format),
 | 
						|
                   wxCRT_SscanfA, (str.AsCharBuf(), format))
 | 
						|
WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxCStrData& str, const wchar_t *format),
 | 
						|
                   wxCRT_SscanfW, (str.AsWCharBuf(), wxScanfConvertFormatW(format)))
 | 
						|
 | 
						|
// Visual C++ doesn't provide vsscanf()
 | 
						|
#ifndef __VISUALC___
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const char *str, const char *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wchar_t *str, const wchar_t *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wxCharBuffer& str, const char *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wxWCharBuffer& str, const wchar_t *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wxString& str, const char *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wxString& str, const wchar_t *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wxCStrData& str, const char *format, va_list ap);
 | 
						|
int WXDLLIMPEXP_BASE wxVsscanf(const wxCStrData& str, const wchar_t *format, va_list ap);
 | 
						|
#endif // !__VISUALC__
 | 
						|
 | 
						|
#endif /* _WX_WXCRTVARARG_H_ */
 |