eb6cb20793
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@46341 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
458 lines
18 KiB
C++
458 lines
18 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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#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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#ifdef wxHAVE_TCHAR_SUPPORT
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#define wxCRT_Fprintf _ftprintf
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#define wxCRT_Printf _tprintf
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#define wxCRT_Vfprintf _vftprintf
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#define wxCRT_Vprintf _vtprintf
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#define wxCRT_Vsprintf _vstprintf
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#else /* !TCHAR-aware compilers */
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#if !wxUSE_UNICODE /* ASCII */
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#define wxCRT_Fprintf fprintf
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#define wxCRT_Printf printf
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#define wxCRT_Vfprintf vfprintf
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#define wxCRT_Vprintf vprintf
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#define wxCRT_Vsprintf vsprintf
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#endif /* ASCII */
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#endif /* TCHAR-aware compilers/the others */
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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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WXDLLIMPEXP_BASE 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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#if wxUSE_UNICODE
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#ifdef HAVE_VSWPRINTF
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#define wxVsnprintf_ vswprintf
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#endif
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#else /* ASCII */
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#ifdef HAVE_BROKEN_VSNPRINTF_DECL
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#define wxVsnprintf_ wx_fixed_vsnprintf
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#else
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#define wxVsnprintf_ vsnprintf
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#endif
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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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#if wxUSE_UNICODE
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#define wxVsnprintf_ _vswprintf_p
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#else
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#define wxVsnprintf_ _vsprintf_p
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#endif
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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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/* first deal with TCHAR-aware compilers which have _vsntprintf */
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#ifndef wxVsnprintf_
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#if defined(__VISUALC__) || \
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(defined(__BORLANDC__) && __BORLANDC__ >= 0x540)
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#define wxVsnprintf_ _vsntprintf
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#endif
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#endif
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/* if this didn't work, define it separately for Unicode and ANSI builds */
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#ifndef wxVsnprintf_
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#if wxUSE_UNICODE
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#if defined(HAVE__VSNWPRINTF)
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#define wxVsnprintf_ _vsnwprintf
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#elif defined(HAVE_VSWPRINTF)
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#define wxVsnprintf_ vswprintf
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#elif defined(__WATCOMC__)
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#define wxVsnprintf_ _vsnwprintf
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#endif
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#else /* ASCII */
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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 wxVsnprintf_ wx_fixed_vsnprintf
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#else
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#define wxVsnprintf_ vsnprintf
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#endif
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#endif
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#endif /* Unicode/ASCII */
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#endif /* wxVsnprintf_ */
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#endif /* wxUSE_PRINTF_POS_PARAMS/!wxUSE_PRINTF_POS_PARAMS */
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#ifndef wxVsnprintf_
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/* no (suitable) vsnprintf(), cook our own */
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WXDLLIMPEXP_BASE int
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wxVsnprintf_(wxChar *buf, size_t len, const wxChar *format, va_list argptr);
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#define wxUSE_WXVSNPRINTF 1
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#else
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#define wxUSE_WXVSNPRINTF 0
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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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/*
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More Unicode complications: although both ANSI C and C++ define a number of
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wide character functions such as wprintf(), not all environments have them.
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Worse, those which do have different behaviours: under Windows, %s format
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specifier changes its meaning in Unicode build and expects a Unicode string
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while under Unix/POSIX it still means an ASCII string even for wprintf() and
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%ls has to be used for wide strings.
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We choose to always emulate Windows behaviour as more useful for us so even
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if we have wprintf() we still must wrap it in a non trivial wxPrintf().
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*/
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#if defined(wxNEED_PRINTF_CONVERSION) || 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_Printf( const wxChar *format, ... ) ATTRIBUTE_PRINTF_1;
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int wxCRT_Fprintf( FILE *stream, const wxChar *format, ... ) ATTRIBUTE_PRINTF_2;
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int wxCRT_Vfprintf( FILE *stream, const wxChar *format, va_list ap );
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int wxCRT_Vprintf( const wxChar *format, va_list ap );
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int wxCRT_Vsprintf( wxChar *str, const wxChar *format, va_list ap );
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#endif /* wxNEED_PRINTF_CONVERSION */
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/* these 2 can be simply mapped to the versions with underscore at the end */
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/* if we don't have to do the conversion */
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/*
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However, if we don't have any vswprintf() at all we don't need to redefine
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anything as our own wxVsnprintf_() already behaves as needed.
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*/
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#if defined(wxNEED_PRINTF_CONVERSION) && defined(wxVsnprintf_)
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int wxCRT_Vsnprintf( wxChar *str, size_t size, const wxChar *format, va_list ap );
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#else
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#define wxCRT_Vsnprintf wxVsnprintf_
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#endif
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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_PRINTF_CONVERSION) || defined(wxNEED_WPRINTF)
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int wxCRT_ScanfW(const wchar_t *format, ...) ATTRIBUTE_PRINTF_1;
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int wxCRT_SscanfW(const wchar_t *str, const wchar_t *format, ...) ATTRIBUTE_PRINTF_2;
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int wxCRT_FscanfW(FILE *stream, const wchar_t *format, ...) ATTRIBUTE_PRINTF_2;
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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: explicit wide-string and short-string format specifiers
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// (%hs, %ls and variants) are currently broken, only %s works
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// as expected (regardless of the build)
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// FIXME-UTF8: %c (and %hc, %lc) don't work as expected either: in UTF-8 build,
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// we should replace them with %s (as some Unicode chars may be
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// encoded with >1 bytes) and in all builds, we should use wchar_t
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// for all characters and convert char to it;
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// we'll also need wxArgNormalizer<T> specializations for char,
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// wchar_t, wxUniChar and wxUniCharRef to handle this correctly
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WX_DEFINE_VARARG_FUNC(int, wxPrintf, 1, (const wxFormatString&),
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wxCRT_Printf, printf)
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WX_DEFINE_VARARG_FUNC(int, wxFprintf, 2, (FILE*, const wxFormatString&),
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wxCRT_Fprintf, fprintf)
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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, implWchar, implUtf8) \
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return implUtf8 args
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#else
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#define WX_VARARG_VFOO_IMPL(args, implWchar, implUtf8) \
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if ( wxLocaleIsUtf8 ) return implUtf8 args; \
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else return implWchar args
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#endif
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#else // wxUSE_UNICODE_WCHAR / ANSI
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#define WX_VARARG_VFOO_IMPL(args, implWchar, implUtf8) \
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return implWchar 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_Vprintf, vprintf);
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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_Vfprintf, vfprintf);
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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), \
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_WX_VARARG_JOIN(N, _WX_VARARG_PASS_WRITABLE)); \
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}
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#define WX_DEFINE_SCANFUNC(name, numfixed, fixed, impl, passfixed) \
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inline int name(_WX_SCANFUNC_EXTRACT_ARGS(numfixed, fixed)) \
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{ \
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return impl(_WX_SCANFUNC_EXTRACT_ARGS(numfixed, passfixed)); \
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} \
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_WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
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_WX_DEFINE_SCANFUNC, \
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dummy1, name, impl, passfixed, numfixed, fixed)
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WX_DEFINE_SCANFUNC(wxScanf, 1, (const char *format),
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wxCRT_ScanfA, (format))
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WX_DEFINE_SCANFUNC(wxScanf, 1, (const wchar_t *format),
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wxCRT_ScanfW, (format))
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WX_DEFINE_SCANFUNC(wxFscanf, 2, (FILE *stream, const char *format),
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wxCRT_FscanfA, (stream, format))
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WX_DEFINE_SCANFUNC(wxFscanf, 2, (FILE *stream, const wchar_t *format),
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wxCRT_FscanfW, (stream, format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const char *str, const char *format),
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wxCRT_SscanfA, (str, format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wchar_t *str, const wchar_t *format),
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wxCRT_SscanfW, (str, format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxCharBuffer& str, const char *format),
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wxCRT_SscanfA, (str.data(), format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxWCharBuffer& str, const wchar_t *format),
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wxCRT_SscanfW, (str.data(), format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxString& str, const char *format),
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wxCRT_SscanfA, (str.mb_str(), format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxString& str, const wchar_t *format),
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wxCRT_SscanfW, (str.wc_str(), format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxCStrData& str, const char *format),
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wxCRT_SscanfA, (str.AsCharBuf(), format))
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WX_DEFINE_SCANFUNC(wxSscanf, 2, (const wxCStrData& str, const wchar_t *format),
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wxCRT_SscanfW, (str.AsWCharBuf(), format))
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// Visual C++ doesn't provide vsscanf()
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#ifndef __VISUALC___
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int WXDLLIMPEXP_BASE wxVsscanf(const char *str, const char *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wchar_t *str, const wchar_t *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wxCharBuffer& str, const char *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wxWCharBuffer& str, const wchar_t *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wxString& str, const char *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wxString& str, const wchar_t *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wxCStrData& str, const char *format, va_list ap);
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int WXDLLIMPEXP_BASE wxVsscanf(const wxCStrData& str, const wchar_t *format, va_list ap);
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#endif // !__VISUALC__
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#endif /* _WX_WXCRTVARARG_H_ */
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