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[wxWidgets.git] / include / wx / strvararg.h
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1///////////////////////////////////////////////////////////////////////////////
2// Name: wx/strvararg.h
3// Purpose: macros for implementing type-safe vararg passing of strings
4// Author: Vaclav Slavik
5// Created: 2007-02-19
6// RCS-ID: $Id$
7// Copyright: (c) 2007 REA Elektronik GmbH
8// Licence: wxWindows licence
9///////////////////////////////////////////////////////////////////////////////
10
11#ifndef _WX_STRVARARG_H_
12#define _WX_STRVARARG_H_
13
14#include "wx/platform.h"
15#if wxONLY_WATCOM_EARLIER_THAN(1,4)
16 #error "OpenWatcom version >= 1.4 is required to compile this code"
17#endif
18
2523e9b7 19#include "wx/cpp.h"
e3f6cbd9 20#include "wx/chartype.h"
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21#include "wx/strconv.h"
22#include "wx/buffer.h"
24d68c95 23#include "wx/unichar.h"
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24
25class WXDLLIMPEXP_BASE wxCStrData;
26class WXDLLIMPEXP_BASE wxString;
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27
28// ----------------------------------------------------------------------------
29// WX_DEFINE_VARARG_FUNC* macros
30// ----------------------------------------------------------------------------
31
32// This macro is used to implement type-safe wrappers for variadic functions
33// that accept strings as arguments. This makes it possible to pass char*,
34// wchar_t* or even wxString (as opposed to having to use wxString::c_str())
35// to e.g. wxPrintf().
36//
37// This is done by defining a set of N template function taking 1..N arguments
38// (currently, N is set to 30 in this header). These functions are just thin
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39// wrappers around another variadic function ('impl' or 'implUtf8' arguments,
40// see below) and the only thing the wrapper does is that it normalizes the
41// arguments passed in so that they are of the type expected by variadic
42// functions taking string arguments, i.e., char* or wchar_t*, depending on the
43// build:
c9f78968 44// * char* in the current locale's charset in ANSI build
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45// * char* with UTF-8 encoding if wxUSE_UNICODE_UTF8 and the app is running
46// under an UTF-8 locale
47// * wchar_t* if wxUSE_UNICODE_WCHAR or if wxUSE_UNICODE_UTF8 and the current
48// locale is not UTF-8
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49//
50// Parameters:
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51// [ there are examples in square brackets showing values of the parameters
52// for the wxFprintf() wrapper for fprintf() function with the following
53// prototype:
54// int wxFprintf(FILE *stream, const wxString& format, ...); ]
55//
56// rettype Functions' return type [int]
57// name Name of the function [fprintf]
58// numfixed The number of leading "fixed" (i.e., not variadic)
59// arguments of the function (e.g. "stream" and "format"
60// arguments of fprintf()); their type is _not_ converted
61// using wxArgNormalizer<T>, unlike the rest of
62// the function's arguments [2]
63// fixed List of types of the leading "fixed" arguments, in
64// parenthesis [(FILE*,const wxString&)]
65// impl Name of the variadic function that implements 'name' for
66// the native strings representation (wchar_t* if
67// wxUSE_UNICODE_WCHAR or wxUSE_UNICODE_UTF8 when running under
68// non-UTF8 locale, char* in ANSI build) [wxCrt_Fprintf]
69// implUtf8 Like 'impl', but for the UTF-8 char* version to be used
70// if wxUSE_UNICODE_UTF8 and running under UTF-8 locale
71// (ignored otherwise) [fprintf]
72//
d1f6e2cf 73#define WX_DEFINE_VARARG_FUNC(rettype, name, numfixed, fixed, impl, implUtf8) \
2523e9b7 74 _WX_VARARG_DEFINE_FUNC_N0(rettype, name, impl, implUtf8, numfixed, fixed) \
d1f6e2cf 75 WX_DEFINE_VARARG_FUNC_SANS_N0(rettype, name, numfixed, fixed, impl, implUtf8)
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76
77// ditto, but without the version with 0 template/vararg arguments
d1f6e2cf 78#define WX_DEFINE_VARARG_FUNC_SANS_N0(rettype, name, \
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79 numfixed, fixed, impl, implUtf8) \
80 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
81 _WX_VARARG_DEFINE_FUNC, \
82 rettype, name, impl, implUtf8, numfixed, fixed)
83
d1f6e2cf 84// Like WX_DEFINE_VARARG_FUNC, but for variadic functions that don't return
c9f78968 85// a value.
d1f6e2cf 86#define WX_DEFINE_VARARG_FUNC_VOID(name, numfixed, fixed, impl, implUtf8) \
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87 _WX_VARARG_DEFINE_FUNC_VOID_N0(name, impl, implUtf8, numfixed, fixed) \
88 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
89 _WX_VARARG_DEFINE_FUNC_VOID, \
90 void, name, impl, implUtf8, numfixed, fixed)
91
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92// Like WX_DEFINE_VARARG_FUNC_VOID, but instead of wrapping an implementation
93// function, does nothing in defined functions' bodies.
94//
95// Used to implement wxLogXXX functions if wxUSE_LOG=0.
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96#define WX_DEFINE_VARARG_FUNC_NOP(name, numfixed, fixed) \
97 _WX_VARARG_DEFINE_FUNC_NOP_N0(name, numfixed, fixed) \
98 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
99 _WX_VARARG_DEFINE_FUNC_NOP, \
82e77a80 100 void, name, dummy, dummy, numfixed, fixed)
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101
102// Like WX_DEFINE_VARARG_FUNC_CTOR, but for defining template constructors
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103#define WX_DEFINE_VARARG_FUNC_CTOR(name, numfixed, fixed, impl, implUtf8) \
104 _WX_VARARG_DEFINE_FUNC_CTOR_N0(name, impl, implUtf8, numfixed, fixed) \
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105 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
106 _WX_VARARG_DEFINE_FUNC_CTOR, \
d1f6e2cf 107 void, name, impl, implUtf8, numfixed, fixed)
c9f78968 108
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109
110// ----------------------------------------------------------------------------
111// wxFormatString
112// ----------------------------------------------------------------------------
113
114// This class should be used for format string argument of the functions
115// defined using WX_DEFINE_VARARG_FUNC_* macros. It converts the string to
116// char* or wchar_t* for passing to implementation function efficiently (i.e.
117// without keeping the converted string in memory for longer than necessary,
118// like c_str())
119//
120// Note that this class can _only_ be used for function arguments!
121class WXDLLIMPEXP_BASE wxFormatString
122{
123public:
124 wxFormatString(const char *str)
125 : m_char(wxCharBuffer::CreateNonOwned(str)), m_str(NULL), m_cstr(NULL) {}
126 wxFormatString(const wchar_t *str)
127 : m_wchar(wxWCharBuffer::CreateNonOwned(str)), m_str(NULL), m_cstr(NULL) {}
128 wxFormatString(const wxString& str)
129 : m_str(&str), m_cstr(NULL) {}
130 wxFormatString(const wxCStrData& str)
131 : m_str(NULL), m_cstr(&str) {}
132 wxFormatString(const wxCharBuffer& str)
133 : m_char(str), m_str(NULL), m_cstr(NULL) {}
134 wxFormatString(const wxWCharBuffer& str)
135 : m_wchar(str), m_str(NULL), m_cstr(NULL) {}
136
137#if !wxUSE_UNICODE_WCHAR
138 operator const char*() const
139 { return wx_const_cast(wxFormatString*, this)->AsChar(); }
140private:
141 const char* AsChar();
142#endif // !wxUSE_UNICODE_WCHAR
143
144#if wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
4960f9fc 145public:
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146 operator const wchar_t*() const
147 { return wx_const_cast(wxFormatString*, this)->AsWChar(); }
148private:
149 const wchar_t* AsWChar();
150#endif // wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
151
152private:
153 wxCharBuffer m_char;
154 wxWCharBuffer m_wchar;
155 // NB: we can use a pointer here, because wxFormatString is only used
156 // as function argument, so it has shorter life than the string
157 // passed to the ctor
158 const wxString * const m_str;
159 const wxCStrData * const m_cstr;
160
161 DECLARE_NO_COPY_CLASS(wxFormatString)
162};
163
c9f78968 164// ----------------------------------------------------------------------------
2523e9b7 165// wxArgNormalizer*<T> converters
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166// ----------------------------------------------------------------------------
167
168// Converts an argument passed to wxPrint etc. into standard form expected,
169// by wxXXX functions, e.g. all strings (wxString, char*, wchar_t*) are
170// converted into wchar_t* or char* depending on the build.
171template<typename T>
172struct wxArgNormalizer
173{
174 wxArgNormalizer(const T& value) : m_value(value) {}
175
176 // Returns the value in a form that can be safely passed to real vararg
177 // functions. In case of strings, this is char* in ANSI build and wchar_t*
178 // in Unicode build.
c9afb3cb 179 T get() const { return m_value; }
c9f78968 180
c9afb3cb 181 T m_value;
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182};
183
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184// normalizer for passing arguments to functions working with wchar_t* (and
185// until ANSI build is removed, char* in ANSI build as well - FIXME-UTF8)
186// string representation
187#if !wxUSE_UTF8_LOCALE_ONLY
188template<typename T>
189struct wxArgNormalizerWchar : public wxArgNormalizer<T>
190{
191 wxArgNormalizerWchar(const T& value) : wxArgNormalizer<T>(value) {}
192};
193#endif // !wxUSE_UTF8_LOCALE_ONLY
194
195// normalizer for passing arguments to functions working with UTF-8 encoded
196// char* strings
197#if wxUSE_UNICODE_UTF8
198 template<typename T>
199 struct wxArgNormalizerUtf8 : public wxArgNormalizer<T>
200 {
201 wxArgNormalizerUtf8(const T& value) : wxArgNormalizer<T>(value) {}
202 };
203
204 #define wxArgNormalizerNative wxArgNormalizerUtf8
205#else // wxUSE_UNICODE_WCHAR
206 #define wxArgNormalizerNative wxArgNormalizerWchar
207#endif // wxUSE_UNICODE_UTF8 // wxUSE_UNICODE_UTF8
208
209
210
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211// special cases for converting strings:
212
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213
214// base class for wxArgNormalizer<T> specializations that need to do conversion;
215// CharType is either wxStringCharType or wchar_t in UTF-8 build when wrapping
216// widechar CRT function
217template<typename CharType>
218struct wxArgNormalizerWithBuffer
c9f78968 219{
2523e9b7 220 typedef wxCharTypeBuffer<CharType> CharBuffer;
c9f78968 221
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222 wxArgNormalizerWithBuffer() {}
223 wxArgNormalizerWithBuffer(const CharBuffer& buf) : m_value(buf) {}
c9f78968 224
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225 const CharType *get() const { return m_value; }
226
227 CharBuffer m_value;
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228};
229
2523e9b7 230// string objects:
c9f78968 231template<>
2523e9b7 232struct WXDLLIMPEXP_BASE wxArgNormalizerNative<const wxString&>
c9f78968 233{
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234 wxArgNormalizerNative(const wxString& s) : m_value(s) {}
235 const wxStringCharType *get() const;
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236
237 const wxString& m_value;
238};
239
2523e9b7 240// c_str() values:
c9f78968 241template<>
2523e9b7 242struct WXDLLIMPEXP_BASE wxArgNormalizerNative<const wxCStrData&>
c9f78968 243{
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244 wxArgNormalizerNative(const wxCStrData& value) : m_value(value) {}
245 const wxStringCharType *get() const;
246
247 const wxCStrData& m_value;
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248};
249
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250// wxString/wxCStrData conversion to wchar_t* value
251#if wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
c9f78968 252template<>
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253struct WXDLLIMPEXP_BASE wxArgNormalizerWchar<const wxString&>
254 : public wxArgNormalizerWithBuffer<wchar_t>
c9f78968 255{
2523e9b7 256 wxArgNormalizerWchar(const wxString& s);
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257};
258
259template<>
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260struct WXDLLIMPEXP_BASE wxArgNormalizerWchar<const wxCStrData&>
261 : public wxArgNormalizerWithBuffer<wchar_t>
c9f78968 262{
2523e9b7 263 wxArgNormalizerWchar(const wxCStrData& s);
c9f78968 264};
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265#endif // wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
266
267
268// C string pointers of the wrong type (wchar_t* for ANSI or UTF8 build,
269// char* for wchar_t Unicode build or UTF8):
270#if wxUSE_UNICODE_WCHAR
81727065 271
81727065 272template<>
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273struct wxArgNormalizerWchar<const char*>
274 : public wxArgNormalizerWithBuffer<wchar_t>
81727065 275{
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276 wxArgNormalizerWchar(const char* s)
277 : wxArgNormalizerWithBuffer<wchar_t>(wxConvLibc.cMB2WC(s)) {}
81727065 278};
c9f78968 279
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280#elif wxUSE_UNICODE_UTF8
281
81727065 282template<>
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283struct wxArgNormalizerUtf8<const wchar_t*>
284 : public wxArgNormalizerWithBuffer<char>
81727065 285{
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286 wxArgNormalizerUtf8(const wchar_t* s)
287 : wxArgNormalizerWithBuffer<char>(wxConvUTF8.cWC2MB(s)) {}
81727065 288};
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289
290template<>
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291struct wxArgNormalizerUtf8<const char*>
292 : public wxArgNormalizerWithBuffer<char>
c9f78968 293{
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294 wxArgNormalizerUtf8(const char* s)
295 {
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296 if ( wxLocaleIsUtf8 )
297 {
298 m_value = wxCharBuffer::CreateNonOwned(s);
299 }
300 else
301 {
302 // convert to widechar string first:
303 wxWCharBuffer buf(wxConvLibc.cMB2WC(s));
304
305 // then to UTF-8:
306 if ( buf )
307 m_value = wxConvUTF8.cWC2MB(buf);
308 }
2523e9b7 309 }
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310};
311
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312// UTF-8 build needs conversion to wchar_t* too:
313#if !wxUSE_UTF8_LOCALE_ONLY
c9f78968 314template<>
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315struct wxArgNormalizerWchar<const char*>
316 : public wxArgNormalizerWithBuffer<wchar_t>
c9f78968 317{
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318 wxArgNormalizerWchar(const char* s)
319 : wxArgNormalizerWithBuffer<wchar_t>(wxConvLibc.cMB2WC(s)) {}
c9f78968 320};
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321#endif // !wxUSE_UTF8_LOCALE_ONLY
322
323#else // ANSI - FIXME-UTF8
c9f78968 324
359bd4d1 325template<>
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326struct wxArgNormalizerWchar<const wchar_t*>
327 : public wxArgNormalizerWithBuffer<char>
359bd4d1 328{
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329 wxArgNormalizerWchar(const wchar_t* s)
330 : wxArgNormalizerWithBuffer<char>(wxConvLibc.cWC2MB(s)) {}
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331};
332
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333#endif // wxUSE_UNICODE_WCHAR/wxUSE_UNICODE_UTF8/ANSI
334
335
336// this macro is used to implement specialization that are exactly same as
337// some other specialization, i.e. to "forward" the implementation (e.g. for
338// T=wxString and T=const wxString&). Note that the ctor takes BaseT argument,
339// not T!
340#if wxUSE_UNICODE_UTF8
341 #if wxUSE_UTF8_LOCALE_ONLY
342 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
343 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerUtf8, T, BaseT)
344 #else // possibly non-UTF8 locales
345 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
346 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerWchar, T, BaseT); \
347 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerUtf8, T, BaseT)
348 #endif
349#else // wxUSE_UNICODE_WCHAR
350 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
351 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerWchar, T, BaseT)
352#endif // wxUSE_UNICODE_UTF8/wxUSE_UNICODE_WCHAR
353
354#define _WX_ARG_NORMALIZER_FORWARD_IMPL(Normalizer, T, BaseT) \
355 template<> \
356 struct Normalizer<T> : public Normalizer<BaseT> \
357 { \
358 Normalizer(BaseT value) : Normalizer<BaseT>(value) {} \
359 }
360
361// non-reference versions of specializations for string objects
362WX_ARG_NORMALIZER_FORWARD(wxString, const wxString&);
363WX_ARG_NORMALIZER_FORWARD(wxCStrData, const wxCStrData&);
364
365// versions for passing non-const pointers:
366WX_ARG_NORMALIZER_FORWARD(char*, const char*);
367WX_ARG_NORMALIZER_FORWARD(wchar_t*, const wchar_t*);
368
369// versions for passing wx[W]CharBuffer:
370WX_ARG_NORMALIZER_FORWARD(wxCharBuffer, const char*);
371WX_ARG_NORMALIZER_FORWARD(const wxCharBuffer&, const char*);
372WX_ARG_NORMALIZER_FORWARD(wxWCharBuffer, const wchar_t*);
373WX_ARG_NORMALIZER_FORWARD(const wxWCharBuffer&, const wchar_t*);
374
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375// versions for std::[w]string:
376#if wxUSE_STD_STRING
377
378#include "wx/stringimpl.h"
379
380#if !wxUSE_UTF8_LOCALE_ONLY
381template<>
382struct wxArgNormalizerWchar<const std::string&>
383 : public wxArgNormalizerWchar<const char*>
384{
385 wxArgNormalizerWchar(const std::string& s)
386 : wxArgNormalizerWchar<const char*>(s.c_str()) {}
387};
388
389template<>
390struct wxArgNormalizerWchar<const wxStdWideString&>
391 : public wxArgNormalizerWchar<const wchar_t*>
392{
393 wxArgNormalizerWchar(const wxStdWideString& s)
394 : wxArgNormalizerWchar<const wchar_t*>(s.c_str()) {}
395};
396#endif // !wxUSE_UTF8_LOCALE_ONLY
397
398#if wxUSE_UNICODE_UTF8
399template<>
400struct wxArgNormalizerUtf8<const std::string&>
401 : public wxArgNormalizerUtf8<const char*>
402{
403 wxArgNormalizerUtf8(const std::string& s)
404 : wxArgNormalizerUtf8<const char*>(s.c_str()) {}
405};
406
407template<>
408struct wxArgNormalizerUtf8<const wxStdWideString&>
409 : public wxArgNormalizerUtf8<const wchar_t*>
410{
411 wxArgNormalizerUtf8(const wxStdWideString& s)
412 : wxArgNormalizerUtf8<const wchar_t*>(s.c_str()) {}
413};
414#endif // wxUSE_UNICODE_UTF8
415
416WX_ARG_NORMALIZER_FORWARD(std::string, const std::string&);
417WX_ARG_NORMALIZER_FORWARD(wxStdWideString, const wxStdWideString&);
418
419#endif // wxUSE_STD_STRING
420
421
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422// versions for wxUniChar, wxUniCharRef:
423
424#if !wxUSE_UTF8_LOCALE_ONLY
425template<>
426struct wxArgNormalizerWchar<const wxUniChar&>
427 : public wxArgNormalizerWchar<wxChar/*FIXME-UTF8: should be wchar_t after ANSI removal*/>
428{
429 wxArgNormalizerWchar(const wxUniChar& s)
430 : wxArgNormalizerWchar<wxChar>((wxChar)s) {}
431};
432#endif // !wxUSE_UTF8_LOCALE_ONLY
433
434#if wxUSE_UNICODE_UTF8
435template<>
436struct wxArgNormalizerUtf8<const wxUniChar&>
437 : public wxArgNormalizerUtf8<char>
438{
439 wxArgNormalizerUtf8(const wxUniChar& s)
440 // FIXME-UTF8: this is lossy, we need to convert to string, but that
441 // requires format string update
442 : wxArgNormalizerUtf8<char>((const char)s) {}
443};
444#endif // wxUSE_UNICODE_UTF8
445
446WX_ARG_NORMALIZER_FORWARD(wxUniChar, const wxUniChar&);
447WX_ARG_NORMALIZER_FORWARD(const wxUniCharRef&, const wxUniChar&);
448WX_ARG_NORMALIZER_FORWARD(wxUniCharRef, const wxUniChar&);
449
450
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451#undef WX_ARG_NORMALIZER_FORWARD
452#undef _WX_ARG_NORMALIZER_FORWARD_IMPL
453
454// ----------------------------------------------------------------------------
455// WX_VA_ARG_STRING
456// ----------------------------------------------------------------------------
457
458// Replacement for va_arg() for use with strings in functions that accept
459// strings normalized by wxArgNormalizer<T>:
460
461struct WXDLLIMPEXP_BASE wxArgNormalizedString
359bd4d1 462{
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463 wxArgNormalizedString(const void* ptr) : m_ptr(ptr) {}
464
465 // returns true if non-NULL string was passed in
466 bool IsValid() const { return m_ptr != NULL; }
467 operator bool() const { return IsValid(); }
468
469 // extracts the string, returns empty string if NULL was passed in
470 wxString GetString() const;
471 operator wxString() const;
472
473private:
474 const void *m_ptr;
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475};
476
2523e9b7 477#define WX_VA_ARG_STRING(ap) wxArgNormalizedString(va_arg(ap, const void*))
359bd4d1 478
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479// ----------------------------------------------------------------------------
480// implementation of the WX_DEFINE_VARARG_* macros
481// ----------------------------------------------------------------------------
359bd4d1 482
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483// NB: The vararg emulation code is limited to 30 variadic and 4 fixed
484// arguments at the moment.
485// If you need more variadic arguments, you need to
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486// 1) increase the value of _WX_VARARG_MAX_ARGS
487// 2) add _WX_VARARG_JOIN_* and _WX_VARARG_ITER_* up to the new
488// _WX_VARARG_MAX_ARGS value to the lists below
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489// If you need more fixed arguments, you need to
490// 1) increase the value of _WX_VARARG_MAX_FIXED_ARGS
491// 2) add _WX_VARARG_FIXED_EXPAND_* and _WX_VARARG_FIXED_UNUSED_EXPAND_*
492// macros below
c9f78968 493#define _WX_VARARG_MAX_ARGS 30
2523e9b7 494#define _WX_VARARG_MAX_FIXED_ARGS 4
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495
496#define _WX_VARARG_JOIN_1(m) m(1)
497#define _WX_VARARG_JOIN_2(m) _WX_VARARG_JOIN_1(m), m(2)
498#define _WX_VARARG_JOIN_3(m) _WX_VARARG_JOIN_2(m), m(3)
499#define _WX_VARARG_JOIN_4(m) _WX_VARARG_JOIN_3(m), m(4)
500#define _WX_VARARG_JOIN_5(m) _WX_VARARG_JOIN_4(m), m(5)
501#define _WX_VARARG_JOIN_6(m) _WX_VARARG_JOIN_5(m), m(6)
502#define _WX_VARARG_JOIN_7(m) _WX_VARARG_JOIN_6(m), m(7)
503#define _WX_VARARG_JOIN_8(m) _WX_VARARG_JOIN_7(m), m(8)
504#define _WX_VARARG_JOIN_9(m) _WX_VARARG_JOIN_8(m), m(9)
505#define _WX_VARARG_JOIN_10(m) _WX_VARARG_JOIN_9(m), m(10)
506#define _WX_VARARG_JOIN_11(m) _WX_VARARG_JOIN_10(m), m(11)
507#define _WX_VARARG_JOIN_12(m) _WX_VARARG_JOIN_11(m), m(12)
508#define _WX_VARARG_JOIN_13(m) _WX_VARARG_JOIN_12(m), m(13)
509#define _WX_VARARG_JOIN_14(m) _WX_VARARG_JOIN_13(m), m(14)
510#define _WX_VARARG_JOIN_15(m) _WX_VARARG_JOIN_14(m), m(15)
511#define _WX_VARARG_JOIN_16(m) _WX_VARARG_JOIN_15(m), m(16)
512#define _WX_VARARG_JOIN_17(m) _WX_VARARG_JOIN_16(m), m(17)
513#define _WX_VARARG_JOIN_18(m) _WX_VARARG_JOIN_17(m), m(18)
514#define _WX_VARARG_JOIN_19(m) _WX_VARARG_JOIN_18(m), m(19)
515#define _WX_VARARG_JOIN_20(m) _WX_VARARG_JOIN_19(m), m(20)
516#define _WX_VARARG_JOIN_21(m) _WX_VARARG_JOIN_20(m), m(21)
517#define _WX_VARARG_JOIN_22(m) _WX_VARARG_JOIN_21(m), m(22)
518#define _WX_VARARG_JOIN_23(m) _WX_VARARG_JOIN_22(m), m(23)
519#define _WX_VARARG_JOIN_24(m) _WX_VARARG_JOIN_23(m), m(24)
520#define _WX_VARARG_JOIN_25(m) _WX_VARARG_JOIN_24(m), m(25)
521#define _WX_VARARG_JOIN_26(m) _WX_VARARG_JOIN_25(m), m(26)
522#define _WX_VARARG_JOIN_27(m) _WX_VARARG_JOIN_26(m), m(27)
523#define _WX_VARARG_JOIN_28(m) _WX_VARARG_JOIN_27(m), m(28)
524#define _WX_VARARG_JOIN_29(m) _WX_VARARG_JOIN_28(m), m(29)
525#define _WX_VARARG_JOIN_30(m) _WX_VARARG_JOIN_29(m), m(30)
526
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527#define _WX_VARARG_ITER_1(m,a,b,c,d,e,f) m(1,a,b,c,d,e,f)
528#define _WX_VARARG_ITER_2(m,a,b,c,d,e,f) _WX_VARARG_ITER_1(m,a,b,c,d,e,f) m(2,a,b,c,d,e,f)
529#define _WX_VARARG_ITER_3(m,a,b,c,d,e,f) _WX_VARARG_ITER_2(m,a,b,c,d,e,f) m(3,a,b,c,d,e,f)
530#define _WX_VARARG_ITER_4(m,a,b,c,d,e,f) _WX_VARARG_ITER_3(m,a,b,c,d,e,f) m(4,a,b,c,d,e,f)
531#define _WX_VARARG_ITER_5(m,a,b,c,d,e,f) _WX_VARARG_ITER_4(m,a,b,c,d,e,f) m(5,a,b,c,d,e,f)
532#define _WX_VARARG_ITER_6(m,a,b,c,d,e,f) _WX_VARARG_ITER_5(m,a,b,c,d,e,f) m(6,a,b,c,d,e,f)
533#define _WX_VARARG_ITER_7(m,a,b,c,d,e,f) _WX_VARARG_ITER_6(m,a,b,c,d,e,f) m(7,a,b,c,d,e,f)
534#define _WX_VARARG_ITER_8(m,a,b,c,d,e,f) _WX_VARARG_ITER_7(m,a,b,c,d,e,f) m(8,a,b,c,d,e,f)
535#define _WX_VARARG_ITER_9(m,a,b,c,d,e,f) _WX_VARARG_ITER_8(m,a,b,c,d,e,f) m(9,a,b,c,d,e,f)
536#define _WX_VARARG_ITER_10(m,a,b,c,d,e,f) _WX_VARARG_ITER_9(m,a,b,c,d,e,f) m(10,a,b,c,d,e,f)
537#define _WX_VARARG_ITER_11(m,a,b,c,d,e,f) _WX_VARARG_ITER_10(m,a,b,c,d,e,f) m(11,a,b,c,d,e,f)
538#define _WX_VARARG_ITER_12(m,a,b,c,d,e,f) _WX_VARARG_ITER_11(m,a,b,c,d,e,f) m(12,a,b,c,d,e,f)
539#define _WX_VARARG_ITER_13(m,a,b,c,d,e,f) _WX_VARARG_ITER_12(m,a,b,c,d,e,f) m(13,a,b,c,d,e,f)
540#define _WX_VARARG_ITER_14(m,a,b,c,d,e,f) _WX_VARARG_ITER_13(m,a,b,c,d,e,f) m(14,a,b,c,d,e,f)
541#define _WX_VARARG_ITER_15(m,a,b,c,d,e,f) _WX_VARARG_ITER_14(m,a,b,c,d,e,f) m(15,a,b,c,d,e,f)
542#define _WX_VARARG_ITER_16(m,a,b,c,d,e,f) _WX_VARARG_ITER_15(m,a,b,c,d,e,f) m(16,a,b,c,d,e,f)
543#define _WX_VARARG_ITER_17(m,a,b,c,d,e,f) _WX_VARARG_ITER_16(m,a,b,c,d,e,f) m(17,a,b,c,d,e,f)
544#define _WX_VARARG_ITER_18(m,a,b,c,d,e,f) _WX_VARARG_ITER_17(m,a,b,c,d,e,f) m(18,a,b,c,d,e,f)
545#define _WX_VARARG_ITER_19(m,a,b,c,d,e,f) _WX_VARARG_ITER_18(m,a,b,c,d,e,f) m(19,a,b,c,d,e,f)
546#define _WX_VARARG_ITER_20(m,a,b,c,d,e,f) _WX_VARARG_ITER_19(m,a,b,c,d,e,f) m(20,a,b,c,d,e,f)
547#define _WX_VARARG_ITER_21(m,a,b,c,d,e,f) _WX_VARARG_ITER_20(m,a,b,c,d,e,f) m(21,a,b,c,d,e,f)
548#define _WX_VARARG_ITER_22(m,a,b,c,d,e,f) _WX_VARARG_ITER_21(m,a,b,c,d,e,f) m(22,a,b,c,d,e,f)
549#define _WX_VARARG_ITER_23(m,a,b,c,d,e,f) _WX_VARARG_ITER_22(m,a,b,c,d,e,f) m(23,a,b,c,d,e,f)
550#define _WX_VARARG_ITER_24(m,a,b,c,d,e,f) _WX_VARARG_ITER_23(m,a,b,c,d,e,f) m(24,a,b,c,d,e,f)
551#define _WX_VARARG_ITER_25(m,a,b,c,d,e,f) _WX_VARARG_ITER_24(m,a,b,c,d,e,f) m(25,a,b,c,d,e,f)
552#define _WX_VARARG_ITER_26(m,a,b,c,d,e,f) _WX_VARARG_ITER_25(m,a,b,c,d,e,f) m(26,a,b,c,d,e,f)
553#define _WX_VARARG_ITER_27(m,a,b,c,d,e,f) _WX_VARARG_ITER_26(m,a,b,c,d,e,f) m(27,a,b,c,d,e,f)
554#define _WX_VARARG_ITER_28(m,a,b,c,d,e,f) _WX_VARARG_ITER_27(m,a,b,c,d,e,f) m(28,a,b,c,d,e,f)
555#define _WX_VARARG_ITER_29(m,a,b,c,d,e,f) _WX_VARARG_ITER_28(m,a,b,c,d,e,f) m(29,a,b,c,d,e,f)
556#define _WX_VARARG_ITER_30(m,a,b,c,d,e,f) _WX_VARARG_ITER_29(m,a,b,c,d,e,f) m(30,a,b,c,d,e,f)
557
558
559#define _WX_VARARG_FIXED_EXPAND_1(t1) \
560 t1 f1
561#define _WX_VARARG_FIXED_EXPAND_2(t1,t2) \
562 t1 f1, t2 f2
563#define _WX_VARARG_FIXED_EXPAND_3(t1,t2,t3) \
564 t1 f1, t2 f2, t3 f3
565#define _WX_VARARG_FIXED_EXPAND_4(t1,t2,t3,t4) \
566 t1 f1, t2 f2, t3 f3, t4 f4
567
568#define _WX_VARARG_FIXED_UNUSED_EXPAND_1(t1) \
569 t1 WXUNUSED(f1)
570#define _WX_VARARG_FIXED_UNUSED_EXPAND_2(t1,t2) \
571 t1 WXUNUSED(f1), t2 WXUNUSED(f2)
572#define _WX_VARARG_FIXED_UNUSED_EXPAND_3(t1,t2,t3) \
573 t1 WXUNUSED(f1), t2 WXUNUSED(f2), t3 WXUNUSED(f3)
574#define _WX_VARARG_FIXED_UNUSED_EXPAND_4(t1,t2,t3,t4) \
575 t1 WXUNUSED(f1), t2 WXUNUSED(f2), t3 WXUNUSED(f3), t4 WXUNUSED(f4)
576
577
578// This macro expands N-items tuple of fixed arguments types into part of
579// function's declaration. For example,
580// "_WX_VARARG_FIXED_EXPAND(3, (int, char*, int))" expands into
581// "int f1, char* f2, int f3".
582#define _WX_VARARG_FIXED_EXPAND(N, args) \
583 _WX_VARARG_FIXED_EXPAND_IMPL(N, args)
584#define _WX_VARARG_FIXED_EXPAND_IMPL(N, args) \
585 _WX_VARARG_FIXED_EXPAND_##N args
586
587// Ditto for unused arguments
588#define _WX_VARARG_FIXED_UNUSED_EXPAND(N, args) \
589 _WX_VARARG_FIXED_UNUSED_EXPAND_IMPL(N, args)
590#define _WX_VARARG_FIXED_UNUSED_EXPAND_IMPL(N, args) \
591 _WX_VARARG_FIXED_UNUSED_EXPAND_##N args
592
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593
594// This macro calls another macro 'm' passed as second argument 'N' times,
595// with its only argument set to 1..N, and concatenates the results using
596// comma as separator.
597//
598// An example:
599// #define foo(i) x##i
600// // this expands to "x1,x2,x3,x4"
601// _WX_VARARG_JOIN(4, foo)
602//
603//
604// N must not be greater than _WX_VARARG_MAX_ARGS (=30).
605#define _WX_VARARG_JOIN(N, m) _WX_VARARG_JOIN_IMPL(N, m)
606#define _WX_VARARG_JOIN_IMPL(N, m) _WX_VARARG_JOIN_##N(m)
607
2523e9b7 608
c9f78968 609// This macro calls another macro 'm' passed as second argument 'N' times, with
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610// its first argument set to 1..N and the remaining arguments set to 'a', 'b',
611// 'c', 'd', 'e' and 'f'. The results are separated with whitespace in the
612// expansion.
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613//
614// An example:
615// // this macro expands to:
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616// // foo(1,a,b,c,d,e,f)
617// // foo(2,a,b,c,d,e,f)
618// // foo(3,a,b,c,d,e,f)
619// _WX_VARARG_ITER(3, foo, a, b, c, d, e, f)
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620//
621// N must not be greater than _WX_VARARG_MAX_ARGS (=30).
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622#define _WX_VARARG_ITER(N,m,a,b,c,d,e,f) \
623 _WX_VARARG_ITER_IMPL(N,m,a,b,c,d,e,f)
624#define _WX_VARARG_ITER_IMPL(N,m,a,b,c,d,e,f) \
625 _WX_VARARG_ITER_##N(m,a,b,c,d,e,f)
c9f78968 626
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627// Generates code snippet for i-th "variadic" argument in vararg function's
628// prototype:
629#define _WX_VARARG_ARG(i) T##i a##i
c9f78968 630
2523e9b7 631// Like _WX_VARARG_ARG_UNUSED, but outputs argument's type with WXUNUSED:
d1f6e2cf 632#define _WX_VARARG_ARG_UNUSED(i) T##i WXUNUSED(a##i)
c9f78968 633
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634// Generates code snippet for i-th type in vararg function's template<...>:
635#define _WX_VARARG_TEMPL(i) typename T##i
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636
637// Generates code snippet for passing i-th argument of vararg function
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638// wrapper to its implementation, normalizing it in the process:
639#define _WX_VARARG_PASS_WCHAR(i) wxArgNormalizerWchar<T##i>(a##i).get()
640#define _WX_VARARG_PASS_UTF8(i) wxArgNormalizerUtf8<T##i>(a##i).get()
641
642
643// And the same for fixed arguments, _not_ normalizing it:
644// FIXME-UTF8: this works, but uses wxString's implicit conversion to wxChar*
645// for the 'format' argument (which is const wxString&) _if_ the
646// implementation function has C sting argument; we need to
647// have wxFixedArgNormalizer<T> here that will pass everything
648// as-is except for wxString (for which wx_str() would be used),
649// but OTOH, we don't want to do that if the implementation takes
650// wxString argument
651#define _WX_VARARG_PASS_FIXED(i) f##i
652
653#if wxUSE_UNICODE_UTF8
654 #define _WX_VARARG_DO_CALL_UTF8(return_kw, impl, implUtf8, N, numfixed) \
655 return_kw implUtf8(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED), \
656 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_UTF8))
657 #define _WX_VARARG_DO_CALL0_UTF8(return_kw, impl, implUtf8, numfixed) \
658 return_kw implUtf8(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED))
659#endif // wxUSE_UNICODE_UTF8
660
661#define _WX_VARARG_DO_CALL_WCHAR(return_kw, impl, implUtf8, N, numfixed) \
662 return_kw impl(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED), \
663 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WCHAR))
664#define _WX_VARARG_DO_CALL0_WCHAR(return_kw, impl, implUtf8, numfixed) \
665 return_kw impl(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED))
666
667#if wxUSE_UNICODE_UTF8
668 #if wxUSE_UTF8_LOCALE_ONLY
669 #define _WX_VARARG_DO_CALL _WX_VARARG_DO_CALL_UTF8
670 #define _WX_VARARG_DO_CALL0 _WX_VARARG_DO_CALL0_UTF8
671 #else // possibly non-UTF8 locales
672 #define _WX_VARARG_DO_CALL(return_kw, impl, implUtf8, N, numfixed) \
673 if ( wxLocaleIsUtf8 ) \
674 _WX_VARARG_DO_CALL_UTF8(return_kw, impl, implUtf8, N, numfixed);\
675 else \
676 _WX_VARARG_DO_CALL_WCHAR(return_kw, impl, implUtf8, N, numfixed)
677
678 #define _WX_VARARG_DO_CALL0(return_kw, impl, implUtf8, numfixed) \
679 if ( wxLocaleIsUtf8 ) \
680 _WX_VARARG_DO_CALL0_UTF8(return_kw, impl, implUtf8, numfixed); \
681 else \
682 _WX_VARARG_DO_CALL0_WCHAR(return_kw, impl, implUtf8, numfixed)
683 #endif // wxUSE_UTF8_LOCALE_ONLY or not
684#else // wxUSE_UNICODE_WCHAR or ANSI
685 #define _WX_VARARG_DO_CALL _WX_VARARG_DO_CALL_WCHAR
686 #define _WX_VARARG_DO_CALL0 _WX_VARARG_DO_CALL0_WCHAR
687#endif // wxUSE_UNICODE_UTF8 / wxUSE_UNICODE_WCHAR
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688
689
690// Macro to be used with _WX_VARARG_ITER in the implementation of
691// WX_DEFINE_VARARG_FUNC (see its documentation for the meaning of arguments)
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692#define _WX_VARARG_DEFINE_FUNC(N, rettype, name, \
693 impl, implUtf8, numfixed, fixed) \
694 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
695 rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
696 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
697 { \
698 _WX_VARARG_DO_CALL(return, impl, implUtf8, N, numfixed); \
699 }
700
701#define _WX_VARARG_DEFINE_FUNC_N0(rettype, name, \
702 impl, implUtf8, numfixed, fixed) \
703 inline rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
704 { \
705 _WX_VARARG_DO_CALL0(return, impl, implUtf8, numfixed); \
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706 }
707
708// Macro to be used with _WX_VARARG_ITER in the implementation of
709// WX_DEFINE_VARARG_FUNC_VOID (see its documentation for the meaning of
710// arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
711// requirements).
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712#define _WX_VARARG_DEFINE_FUNC_VOID(N, rettype, name, \
713 impl, implUtf8, numfixed, fixed) \
714 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
715 void name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
716 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
717 { \
718 _WX_VARARG_DO_CALL(wxEMPTY_PARAMETER_VALUE, \
719 impl, implUtf8, N, numfixed); \
720 }
721
722#define _WX_VARARG_DEFINE_FUNC_VOID_N0(name, impl, implUtf8, numfixed, fixed) \
723 inline void name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
724 { \
725 _WX_VARARG_DO_CALL0(wxEMPTY_PARAMETER_VALUE, \
726 impl, implUtf8, numfixed); \
727 }
728
729// Macro to be used with _WX_VARARG_ITER in the implementation of
730// WX_DEFINE_VARARG_FUNC_CTOR (see its documentation for the meaning of
731// arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
732// requirements).
733#define _WX_VARARG_DEFINE_FUNC_CTOR(N, rettype, name, \
734 impl, implUtf8, numfixed, fixed) \
735 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
736 name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
737 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
738 { \
739 _WX_VARARG_DO_CALL(wxEMPTY_PARAMETER_VALUE, \
740 impl, implUtf8, N, numfixed); \
741 }
742
743#define _WX_VARARG_DEFINE_FUNC_CTOR_N0(name, impl, implUtf8, numfixed, fixed) \
744 inline name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
745 { \
746 _WX_VARARG_DO_CALL0(wxEMPTY_PARAMETER_VALUE, \
747 impl, implUtf8, numfixed); \
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748 }
749
750// Macro to be used with _WX_VARARG_ITER in the implementation of
751// WX_DEFINE_VARARG_FUNC_NOP, i.e. empty stub for a disabled vararg function.
752// The rettype and impl arguments are ignored.
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753#define _WX_VARARG_DEFINE_FUNC_NOP(N, rettype, name, \
754 impl, implUtf8, numfixed, fixed) \
755 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
756 void name(_WX_VARARG_FIXED_UNUSED_EXPAND(numfixed, fixed), \
757 _WX_VARARG_JOIN(N, _WX_VARARG_ARG_UNUSED)) \
758 {}
759
760#define _WX_VARARG_DEFINE_FUNC_NOP_N0(name, numfixed, fixed) \
761 inline void name(_WX_VARARG_FIXED_UNUSED_EXPAND(numfixed, fixed)) \
762 {}
c9f78968 763
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764
765// ----------------------------------------------------------------------------
766// workaround for OpenWatcom bug #351
767// ----------------------------------------------------------------------------
768
769#ifdef __WATCOMC__
770// workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
771
772// This macro can be used to forward a 'vararg' template to another one with
773// different fixed arguments types. Parameters are same as for
774// WX_DEFINE_VARARG_FUNC (rettype=void can be used here), 'convfixed' is how
775// to convert fixed arguments. For example, this is typical code for dealing
776// with different forms of format string:
777//
778// WX_DEFINE_VARARG_FUNC_VOID(Printf, 1, (const wxFormatString&),
779// DoPrintfWchar, DoPrintfUtf8)
780// #ifdef __WATCOMC__
781// WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const wxString&),
782// (wxFormatString(f1)))
783// WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const char*),
784// (wxFormatString(f1)))
785// ...
786#define WX_VARARG_WATCOM_WORKAROUND(rettype, name, numfixed, fixed, convfixed)\
787 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
788 _WX_VARARG_WATCOM_WORKAROUND, \
789 rettype, name, convfixed, dummy, numfixed, fixed)
790
791#define WX_VARARG_WATCOM_WORKAROUND_CTOR(name, numfixed, fixed, convfixed) \
792 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
793 _WX_VARARG_WATCOM_WORKAROUND_CTOR, \
794 dummy, name, convfixed, dummy, numfixed, fixed)
795
796#define _WX_VARARG_WATCOM_UNPACK_1(a1) a1
797#define _WX_VARARG_WATCOM_UNPACK_2(a1, a2) a1, a2
798#define _WX_VARARG_WATCOM_UNPACK_3(a1, a2, a3) a1, a2, a3
799#define _WX_VARARG_WATCOM_UNPACK_4(a1, a2, a3, a4) a1, a2, a3, a4
800#define _WX_VARARG_WATCOM_UNPACK(N, convfixed) \
801 _WX_VARARG_WATCOM_UNPACK_##N convfixed
802
803#define _WX_VARARG_WATCOM_WORKAROUND(N, rettype, name, \
804 convfixed, dummy, numfixed, fixed) \
805 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
806 rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
807 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
808 { \
809 return name(_WX_VARARG_WATCOM_UNPACK(numfixed, convfixed), \
810 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WCHAR)); \
811 }
812
813#define _WX_VARARG_WATCOM_WORKAROUND_CTOR(N, dummy1, name, \
814 convfixed, dummy2, numfixed, fixed) \
815 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
816 name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
817 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
818 { \
819 name(_WX_VARARG_WATCOM_UNPACK(numfixed, convfixed), \
820 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WCHAR)); \
821 }
822
823#endif // __WATCOMC__
824
c9f78968 825#endif // _WX_STRVARARG_H_