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[wxWidgets.git] / include / wx / strvararg.h
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
19 #include "wx/cpp.h"
20 #include "wx/chartype.h"
21 #include "wx/strconv.h"
22 #include "wx/buffer.h"
23 #include "wx/unichar.h"
24
25 class WXDLLIMPEXP_FWD_BASE wxCStrData;
26 class WXDLLIMPEXP_FWD_BASE wxString;
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
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:
44 // * char* in the current locale's charset in ANSI build
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
49 //
50 // Note that wxFormatString *must* be used for the format parameter of these
51 // functions, otherwise the implementation won't work correctly. Furthermore,
52 // it must be passed by value, not reference, because it's modified by the
53 // vararg templates internally.
54 //
55 // Parameters:
56 // [ there are examples in square brackets showing values of the parameters
57 // for the wxFprintf() wrapper for fprintf() function with the following
58 // prototype:
59 // int wxFprintf(FILE *stream, const wxString& format, ...); ]
60 //
61 // rettype Functions' return type [int]
62 // name Name of the function [fprintf]
63 // numfixed The number of leading "fixed" (i.e., not variadic)
64 // arguments of the function (e.g. "stream" and "format"
65 // arguments of fprintf()); their type is _not_ converted
66 // using wxArgNormalizer<T>, unlike the rest of
67 // the function's arguments [2]
68 // fixed List of types of the leading "fixed" arguments, in
69 // parenthesis [(FILE*,const wxString&)]
70 // impl Name of the variadic function that implements 'name' for
71 // the native strings representation (wchar_t* if
72 // wxUSE_UNICODE_WCHAR or wxUSE_UNICODE_UTF8 when running under
73 // non-UTF8 locale, char* in ANSI build) [wxCrt_Fprintf]
74 // implUtf8 Like 'impl', but for the UTF-8 char* version to be used
75 // if wxUSE_UNICODE_UTF8 and running under UTF-8 locale
76 // (ignored otherwise) [fprintf]
77 //
78 #define WX_DEFINE_VARARG_FUNC(rettype, name, numfixed, fixed, impl, implUtf8) \
79 _WX_VARARG_DEFINE_FUNC_N0(rettype, name, impl, implUtf8, numfixed, fixed) \
80 WX_DEFINE_VARARG_FUNC_SANS_N0(rettype, name, numfixed, fixed, impl, implUtf8)
81
82 // ditto, but without the version with 0 template/vararg arguments
83 #define WX_DEFINE_VARARG_FUNC_SANS_N0(rettype, name, \
84 numfixed, fixed, impl, implUtf8) \
85 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
86 _WX_VARARG_DEFINE_FUNC, \
87 rettype, name, impl, implUtf8, numfixed, fixed)
88
89 // Like WX_DEFINE_VARARG_FUNC, but for variadic functions that don't return
90 // a value.
91 #define WX_DEFINE_VARARG_FUNC_VOID(name, numfixed, fixed, impl, implUtf8) \
92 _WX_VARARG_DEFINE_FUNC_VOID_N0(name, impl, implUtf8, numfixed, fixed) \
93 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
94 _WX_VARARG_DEFINE_FUNC_VOID, \
95 void, name, impl, implUtf8, numfixed, fixed)
96
97 // Like WX_DEFINE_VARARG_FUNC_VOID, but instead of wrapping an implementation
98 // function, does nothing in defined functions' bodies.
99 //
100 // Used to implement wxLogXXX functions if wxUSE_LOG=0.
101 #define WX_DEFINE_VARARG_FUNC_NOP(name, numfixed, fixed) \
102 _WX_VARARG_DEFINE_FUNC_NOP_N0(name, numfixed, fixed) \
103 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
104 _WX_VARARG_DEFINE_FUNC_NOP, \
105 void, name, dummy, dummy, numfixed, fixed)
106
107 // Like WX_DEFINE_VARARG_FUNC_CTOR, but for defining template constructors
108 #define WX_DEFINE_VARARG_FUNC_CTOR(name, numfixed, fixed, impl, implUtf8) \
109 _WX_VARARG_DEFINE_FUNC_CTOR_N0(name, impl, implUtf8, numfixed, fixed) \
110 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
111 _WX_VARARG_DEFINE_FUNC_CTOR, \
112 void, name, impl, implUtf8, numfixed, fixed)
113
114
115 // ----------------------------------------------------------------------------
116 // wxFormatString
117 // ----------------------------------------------------------------------------
118
119 // This class must be used for format string argument of the functions
120 // defined using WX_DEFINE_VARARG_FUNC_* macros. It converts the string to
121 // char* or wchar_t* for passing to implementation function efficiently (i.e.
122 // without keeping the converted string in memory for longer than necessary,
123 // like c_str()). It also converts format string to the correct form that
124 // accounts for string changes done by wxArgNormalizer<>
125 //
126 // Note that this class can _only_ be used for function arguments!
127 class WXDLLIMPEXP_BASE wxFormatString
128 {
129 public:
130 wxFormatString(const char *str)
131 : m_char(wxCharBuffer::CreateNonOwned(str)), m_str(NULL), m_cstr(NULL) {}
132 wxFormatString(const wchar_t *str)
133 : m_wchar(wxWCharBuffer::CreateNonOwned(str)), m_str(NULL), m_cstr(NULL) {}
134 wxFormatString(const wxString& str)
135 : m_str(&str), m_cstr(NULL) {}
136 wxFormatString(const wxCStrData& str)
137 : m_str(NULL), m_cstr(&str) {}
138 wxFormatString(const wxCharBuffer& str)
139 : m_char(str), m_str(NULL), m_cstr(NULL) {}
140 wxFormatString(const wxWCharBuffer& str)
141 : m_wchar(str), m_str(NULL), m_cstr(NULL) {}
142
143
144 enum ArgumentType
145 {
146 Arg_Char, // character as char
147
148 Arg_Other // something else, for example int for %d
149 };
150
151 // returns the type of format specifier for n-th variadic argument (this is
152 // not necessarily n-th format specifier if positional specifiers are used);
153 // called by wxArgNormalizer<> specializations to get information about
154 // n-th variadic argument desired representation
155 ArgumentType GetArgumentType(unsigned n) const;
156
157 #if !wxUSE_UNICODE_WCHAR
158 operator const char*() const
159 { return wx_const_cast(wxFormatString*, this)->AsChar(); }
160 private:
161 // InputAsChar() returns the value converted passed to ctor, only converted
162 // to char, while AsChar() takes the the string returned by InputAsChar()
163 // and does format string conversion on it as well (and similarly for
164 // ..AsWChar() below)
165 const char* InputAsChar();
166 const char* AsChar();
167 wxCharBuffer m_convertedChar;
168 #endif // !wxUSE_UNICODE_WCHAR
169
170 #if wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
171 public:
172 operator const wchar_t*() const
173 { return wx_const_cast(wxFormatString*, this)->AsWChar(); }
174 private:
175 const wchar_t* InputAsWChar();
176 const wchar_t* AsWChar();
177 wxWCharBuffer m_convertedWChar;
178 #endif // wxUSE_UNICODE && !wxUSE_UTF8_LOCALE_ONLY
179
180 private:
181 wxCharBuffer m_char;
182 wxWCharBuffer m_wchar;
183
184 // NB: we can use a pointer here, because wxFormatString is only used
185 // as function argument, so it has shorter life than the string
186 // passed to the ctor
187 const wxString * const m_str;
188 const wxCStrData * const m_cstr;
189
190 DECLARE_NO_ASSIGN_CLASS(wxFormatString)
191 };
192
193 // these two helper classes are used to find wxFormatString argument among fixed
194 // arguments passed to a vararg template
195 struct wxFormatStringArgument
196 {
197 wxFormatStringArgument(const wxFormatString *s = NULL) : m_str(s) {}
198 const wxFormatString *m_str;
199
200 // overriding this operator allows us to reuse _WX_VARARG_JOIN macro
201 wxFormatStringArgument operator,(const wxFormatStringArgument& a) const
202 {
203 wxASSERT_MSG( m_str == NULL || a.m_str == NULL,
204 "can't have two format strings in vararg function" );
205 return wxFormatStringArgument(m_str ? m_str : a.m_str);
206 }
207
208 operator const wxFormatString*() const { return m_str; }
209 };
210
211 template<typename T>
212 struct wxFormatStringArgumentFinder
213 {
214 static wxFormatStringArgument find(T)
215 {
216 // by default, arguments are not format strings, so return "not found"
217 return wxFormatStringArgument();
218 }
219 };
220
221 template<>
222 struct wxFormatStringArgumentFinder<const wxFormatString&>
223 {
224 static wxFormatStringArgument find(const wxFormatString& arg)
225 { return wxFormatStringArgument(&arg); }
226 };
227
228 template<>
229 struct wxFormatStringArgumentFinder<wxFormatString>
230 {
231 static wxFormatStringArgument find(const wxFormatString& arg)
232 { return wxFormatStringArgument(&arg); }
233 };
234
235
236 // ----------------------------------------------------------------------------
237 // wxArgNormalizer*<T> converters
238 // ----------------------------------------------------------------------------
239
240 // Converts an argument passed to wxPrint etc. into standard form expected,
241 // by wxXXX functions, e.g. all strings (wxString, char*, wchar_t*) are
242 // converted into wchar_t* or char* depending on the build.
243 template<typename T>
244 struct wxArgNormalizer
245 {
246 // Ctor. 'value' is the value passed as variadic argument, 'fmt' is pointer
247 // to printf-like format string or NULL if the variadic function doesn't
248 // use format string and 'index' is index of 'value' in variadic arguments
249 // list (starting at 1)
250 wxArgNormalizer(T value,
251 const wxFormatString *WXUNUSED(fmt), unsigned WXUNUSED(index))
252 : m_value(value) {}
253
254 // Returns the value in a form that can be safely passed to real vararg
255 // functions. In case of strings, this is char* in ANSI build and wchar_t*
256 // in Unicode build.
257 T get() const { return m_value; }
258
259 T m_value;
260 };
261
262 // normalizer for passing arguments to functions working with wchar_t* (and
263 // until ANSI build is removed, char* in ANSI build as well - FIXME-UTF8)
264 // string representation
265 #if !wxUSE_UTF8_LOCALE_ONLY
266 template<typename T>
267 struct wxArgNormalizerWchar : public wxArgNormalizer<T>
268 {
269 wxArgNormalizerWchar(T value,
270 const wxFormatString *fmt, unsigned index)
271 : wxArgNormalizer<T>(value, fmt, index) {}
272 };
273 #endif // !wxUSE_UTF8_LOCALE_ONLY
274
275 // normalizer for passing arguments to functions working with UTF-8 encoded
276 // char* strings
277 #if wxUSE_UNICODE_UTF8
278 template<typename T>
279 struct wxArgNormalizerUtf8 : public wxArgNormalizer<T>
280 {
281 wxArgNormalizerUtf8(T value,
282 const wxFormatString *fmt, unsigned index)
283 : wxArgNormalizer<T>(value, fmt, index) {}
284 };
285
286 #define wxArgNormalizerNative wxArgNormalizerUtf8
287 #else // wxUSE_UNICODE_WCHAR
288 #define wxArgNormalizerNative wxArgNormalizerWchar
289 #endif // wxUSE_UNICODE_UTF8 // wxUSE_UNICODE_UTF8
290
291
292
293 // special cases for converting strings:
294
295
296 // base class for wxArgNormalizer<T> specializations that need to do conversion;
297 // CharType is either wxStringCharType or wchar_t in UTF-8 build when wrapping
298 // widechar CRT function
299 template<typename CharType>
300 struct wxArgNormalizerWithBuffer
301 {
302 typedef wxCharTypeBuffer<CharType> CharBuffer;
303
304 wxArgNormalizerWithBuffer() {}
305 wxArgNormalizerWithBuffer(const CharBuffer& buf,
306 const wxFormatString *WXUNUSED(fmt),
307 unsigned WXUNUSED(index))
308 : m_value(buf) {}
309
310 const CharType *get() const { return m_value; }
311
312 CharBuffer m_value;
313 };
314
315 // string objects:
316 template<>
317 struct WXDLLIMPEXP_BASE wxArgNormalizerNative<const wxString&>
318 {
319 wxArgNormalizerNative(const wxString& s,
320 const wxFormatString *WXUNUSED(fmt),
321 unsigned WXUNUSED(index))
322 : m_value(s) {}
323
324 const wxStringCharType *get() const;
325
326 const wxString& m_value;
327 };
328
329 // c_str() values:
330 template<>
331 struct WXDLLIMPEXP_BASE wxArgNormalizerNative<const wxCStrData&>
332 {
333 wxArgNormalizerNative(const wxCStrData& value,
334 const wxFormatString *WXUNUSED(fmt),
335 unsigned WXUNUSED(index))
336 : m_value(value) {}
337
338 const wxStringCharType *get() const;
339
340 const wxCStrData& m_value;
341 };
342
343 // wxString/wxCStrData conversion to wchar_t* value
344 #if wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
345 template<>
346 struct WXDLLIMPEXP_BASE wxArgNormalizerWchar<const wxString&>
347 : public wxArgNormalizerWithBuffer<wchar_t>
348 {
349 wxArgNormalizerWchar(const wxString& s,
350 const wxFormatString *fmt, unsigned index);
351 };
352
353 template<>
354 struct WXDLLIMPEXP_BASE wxArgNormalizerWchar<const wxCStrData&>
355 : public wxArgNormalizerWithBuffer<wchar_t>
356 {
357 wxArgNormalizerWchar(const wxCStrData& s,
358 const wxFormatString *fmt, unsigned index);
359 };
360 #endif // wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
361
362
363 // C string pointers of the wrong type (wchar_t* for ANSI or UTF8 build,
364 // char* for wchar_t Unicode build or UTF8):
365 #if wxUSE_UNICODE_WCHAR
366
367 template<>
368 struct wxArgNormalizerWchar<const char*>
369 : public wxArgNormalizerWithBuffer<wchar_t>
370 {
371 wxArgNormalizerWchar(const char* s,
372 const wxFormatString *fmt, unsigned index)
373 : wxArgNormalizerWithBuffer<wchar_t>(wxConvLibc.cMB2WC(s), fmt, index) {}
374 };
375
376 #elif wxUSE_UNICODE_UTF8
377
378 template<>
379 struct wxArgNormalizerUtf8<const wchar_t*>
380 : public wxArgNormalizerWithBuffer<char>
381 {
382 wxArgNormalizerUtf8(const wchar_t* s,
383 const wxFormatString *fmt, unsigned index)
384 : wxArgNormalizerWithBuffer<char>(wxConvUTF8.cWC2MB(s), fmt, index) {}
385 };
386
387 template<>
388 struct wxArgNormalizerUtf8<const char*>
389 : public wxArgNormalizerWithBuffer<char>
390 {
391 wxArgNormalizerUtf8(const char* s,
392 const wxFormatString *WXUNUSED(fmt),
393 unsigned WXUNUSED(index))
394 {
395 if ( wxLocaleIsUtf8 )
396 {
397 m_value = wxCharBuffer::CreateNonOwned(s);
398 }
399 else
400 {
401 // convert to widechar string first:
402 wxWCharBuffer buf(wxConvLibc.cMB2WC(s));
403
404 // then to UTF-8:
405 if ( buf )
406 m_value = wxConvUTF8.cWC2MB(buf);
407 }
408 }
409 };
410
411 // UTF-8 build needs conversion to wchar_t* too:
412 #if !wxUSE_UTF8_LOCALE_ONLY
413 template<>
414 struct wxArgNormalizerWchar<const char*>
415 : public wxArgNormalizerWithBuffer<wchar_t>
416 {
417 wxArgNormalizerWchar(const char* s,
418 const wxFormatString *fmt, unsigned index)
419 : wxArgNormalizerWithBuffer<wchar_t>(wxConvLibc.cMB2WC(s), fmt, index) {}
420 };
421 #endif // !wxUSE_UTF8_LOCALE_ONLY
422
423 #else // ANSI - FIXME-UTF8
424
425 template<>
426 struct wxArgNormalizerWchar<const wchar_t*>
427 : public wxArgNormalizerWithBuffer<char>
428 {
429 wxArgNormalizerWchar(const wchar_t* s,
430 const wxFormatString *fmt, unsigned index)
431 : wxArgNormalizerWithBuffer<char>(wxConvLibc.cWC2MB(s), fmt, index) {}
432 };
433
434 #endif // wxUSE_UNICODE_WCHAR/wxUSE_UNICODE_UTF8/ANSI
435
436
437 // this macro is used to implement specialization that are exactly same as
438 // some other specialization, i.e. to "forward" the implementation (e.g. for
439 // T=wxString and T=const wxString&). Note that the ctor takes BaseT argument,
440 // not T!
441 #if wxUSE_UNICODE_UTF8
442 #if wxUSE_UTF8_LOCALE_ONLY
443 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
444 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerUtf8, T, BaseT)
445 #else // possibly non-UTF8 locales
446 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
447 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerWchar, T, BaseT); \
448 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerUtf8, T, BaseT)
449 #endif
450 #else // wxUSE_UNICODE_WCHAR
451 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
452 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerWchar, T, BaseT)
453 #endif // wxUSE_UNICODE_UTF8/wxUSE_UNICODE_WCHAR
454
455 #define _WX_ARG_NORMALIZER_FORWARD_IMPL(Normalizer, T, BaseT) \
456 template<> \
457 struct Normalizer<T> : public Normalizer<BaseT> \
458 { \
459 Normalizer(BaseT value, \
460 const wxFormatString *fmt, unsigned index) \
461 : Normalizer<BaseT>(value, fmt, index) {} \
462 }
463
464 // non-reference versions of specializations for string objects
465 WX_ARG_NORMALIZER_FORWARD(wxString, const wxString&);
466 WX_ARG_NORMALIZER_FORWARD(wxCStrData, const wxCStrData&);
467
468 // versions for passing non-const pointers:
469 WX_ARG_NORMALIZER_FORWARD(char*, const char*);
470 WX_ARG_NORMALIZER_FORWARD(wchar_t*, const wchar_t*);
471
472 // versions for passing wx[W]CharBuffer:
473 WX_ARG_NORMALIZER_FORWARD(wxCharBuffer, const char*);
474 WX_ARG_NORMALIZER_FORWARD(const wxCharBuffer&, const char*);
475 WX_ARG_NORMALIZER_FORWARD(wxWCharBuffer, const wchar_t*);
476 WX_ARG_NORMALIZER_FORWARD(const wxWCharBuffer&, const wchar_t*);
477
478 // versions for std::[w]string:
479 #if wxUSE_STD_STRING
480
481 #include "wx/stringimpl.h"
482
483 #if !wxUSE_UTF8_LOCALE_ONLY
484 template<>
485 struct wxArgNormalizerWchar<const std::string&>
486 : public wxArgNormalizerWchar<const char*>
487 {
488 wxArgNormalizerWchar(const std::string& s,
489 const wxFormatString *fmt, unsigned index)
490 : wxArgNormalizerWchar<const char*>(s.c_str(), fmt, index) {}
491 };
492
493 template<>
494 struct wxArgNormalizerWchar<const wxStdWideString&>
495 : public wxArgNormalizerWchar<const wchar_t*>
496 {
497 wxArgNormalizerWchar(const wxStdWideString& s,
498 const wxFormatString *fmt, unsigned index)
499 : wxArgNormalizerWchar<const wchar_t*>(s.c_str(), fmt, index) {}
500 };
501 #endif // !wxUSE_UTF8_LOCALE_ONLY
502
503 #if wxUSE_UNICODE_UTF8
504 template<>
505 struct wxArgNormalizerUtf8<const std::string&>
506 : public wxArgNormalizerUtf8<const char*>
507 {
508 wxArgNormalizerUtf8(const std::string& s,
509 const wxFormatString *fmt, unsigned index)
510 : wxArgNormalizerUtf8<const char*>(s.c_str(), fmt, index) {}
511 };
512
513 template<>
514 struct wxArgNormalizerUtf8<const wxStdWideString&>
515 : public wxArgNormalizerUtf8<const wchar_t*>
516 {
517 wxArgNormalizerUtf8(const wxStdWideString& s,
518 const wxFormatString *fmt, unsigned index)
519 : wxArgNormalizerUtf8<const wchar_t*>(s.c_str(), fmt, index) {}
520 };
521 #endif // wxUSE_UNICODE_UTF8
522
523 WX_ARG_NORMALIZER_FORWARD(std::string, const std::string&);
524 WX_ARG_NORMALIZER_FORWARD(wxStdWideString, const wxStdWideString&);
525
526 #endif // wxUSE_STD_STRING
527
528
529 // versions for wxUniChar, wxUniCharRef:
530 // (this is same for UTF-8 and Wchar builds, we just convert to wchar_t)
531 template<>
532 struct wxArgNormalizer<const wxUniChar&> : public wxArgNormalizer<wchar_t>
533 {
534 wxArgNormalizer(const wxUniChar& s,
535 const wxFormatString *fmt, unsigned index)
536 : wxArgNormalizer<wchar_t>(s.GetValue(), fmt, index) {}
537 };
538
539 // for wchar_t, default handler does the right thing
540
541 // char has to be treated differently in Unicode builds: a char argument may
542 // be used either for a character value (which should be converted into
543 // wxUniChar) or as an integer value (which should be left as-is). We take
544 // advantage of the fact that both char and wchar_t are converted into int
545 // in variadic arguments here.
546 #if wxUSE_UNICODE
547 template<typename T>
548 struct wxArgNormalizerNarrowChar
549 {
550 wxArgNormalizerNarrowChar(T value,
551 const wxFormatString *fmt, unsigned index)
552 {
553 // FIXME-UTF8: which one is better default in absence of fmt string
554 // (i.e. when used like e.g. Foo("foo", "bar", 'c', NULL)?
555 if ( !fmt || fmt->GetArgumentType(index) == wxFormatString::Arg_Char )
556 m_value = wxUniChar(value).GetValue();
557 else
558 m_value = value;
559 }
560
561 int get() const { return m_value; }
562
563 T m_value;
564 };
565
566 template<>
567 struct wxArgNormalizer<char> : public wxArgNormalizerNarrowChar<char>
568 {
569 wxArgNormalizer(char value,
570 const wxFormatString *fmt, unsigned index)
571 : wxArgNormalizerNarrowChar<char>(value, fmt, index) {}
572 };
573
574 template<>
575 struct wxArgNormalizer<unsigned char>
576 : public wxArgNormalizerNarrowChar<unsigned char>
577 {
578 wxArgNormalizer(unsigned char value,
579 const wxFormatString *fmt, unsigned index)
580 : wxArgNormalizerNarrowChar<unsigned char>(value, fmt, index) {}
581 };
582
583 #endif // wxUSE_UNICODE
584
585 // convert references:
586 WX_ARG_NORMALIZER_FORWARD(wxUniChar, const wxUniChar&);
587 WX_ARG_NORMALIZER_FORWARD(const wxUniCharRef&, const wxUniChar&);
588 WX_ARG_NORMALIZER_FORWARD(wxUniCharRef, const wxUniChar&);
589 WX_ARG_NORMALIZER_FORWARD(const wchar_t&, wchar_t);
590
591 WX_ARG_NORMALIZER_FORWARD(const char&, char);
592 WX_ARG_NORMALIZER_FORWARD(const unsigned char&, unsigned char);
593
594
595 #undef WX_ARG_NORMALIZER_FORWARD
596 #undef _WX_ARG_NORMALIZER_FORWARD_IMPL
597
598 // ----------------------------------------------------------------------------
599 // WX_VA_ARG_STRING
600 // ----------------------------------------------------------------------------
601
602 // Replacement for va_arg() for use with strings in functions that accept
603 // strings normalized by wxArgNormalizer<T>:
604
605 struct WXDLLIMPEXP_BASE wxArgNormalizedString
606 {
607 wxArgNormalizedString(const void* ptr) : m_ptr(ptr) {}
608
609 // returns true if non-NULL string was passed in
610 bool IsValid() const { return m_ptr != NULL; }
611 operator bool() const { return IsValid(); }
612
613 // extracts the string, returns empty string if NULL was passed in
614 wxString GetString() const;
615 operator wxString() const;
616
617 private:
618 const void *m_ptr;
619 };
620
621 #define WX_VA_ARG_STRING(ap) wxArgNormalizedString(va_arg(ap, const void*))
622
623 // ----------------------------------------------------------------------------
624 // implementation of the WX_DEFINE_VARARG_* macros
625 // ----------------------------------------------------------------------------
626
627 // NB: The vararg emulation code is limited to 30 variadic and 4 fixed
628 // arguments at the moment.
629 // If you need more variadic arguments, you need to
630 // 1) increase the value of _WX_VARARG_MAX_ARGS
631 // 2) add _WX_VARARG_JOIN_* and _WX_VARARG_ITER_* up to the new
632 // _WX_VARARG_MAX_ARGS value to the lists below
633 // If you need more fixed arguments, you need to
634 // 1) increase the value of _WX_VARARG_MAX_FIXED_ARGS
635 // 2) add _WX_VARARG_FIXED_EXPAND_* and _WX_VARARG_FIXED_UNUSED_EXPAND_*
636 // macros below
637 #define _WX_VARARG_MAX_ARGS 30
638 #define _WX_VARARG_MAX_FIXED_ARGS 4
639
640 #define _WX_VARARG_JOIN_1(m) m(1)
641 #define _WX_VARARG_JOIN_2(m) _WX_VARARG_JOIN_1(m), m(2)
642 #define _WX_VARARG_JOIN_3(m) _WX_VARARG_JOIN_2(m), m(3)
643 #define _WX_VARARG_JOIN_4(m) _WX_VARARG_JOIN_3(m), m(4)
644 #define _WX_VARARG_JOIN_5(m) _WX_VARARG_JOIN_4(m), m(5)
645 #define _WX_VARARG_JOIN_6(m) _WX_VARARG_JOIN_5(m), m(6)
646 #define _WX_VARARG_JOIN_7(m) _WX_VARARG_JOIN_6(m), m(7)
647 #define _WX_VARARG_JOIN_8(m) _WX_VARARG_JOIN_7(m), m(8)
648 #define _WX_VARARG_JOIN_9(m) _WX_VARARG_JOIN_8(m), m(9)
649 #define _WX_VARARG_JOIN_10(m) _WX_VARARG_JOIN_9(m), m(10)
650 #define _WX_VARARG_JOIN_11(m) _WX_VARARG_JOIN_10(m), m(11)
651 #define _WX_VARARG_JOIN_12(m) _WX_VARARG_JOIN_11(m), m(12)
652 #define _WX_VARARG_JOIN_13(m) _WX_VARARG_JOIN_12(m), m(13)
653 #define _WX_VARARG_JOIN_14(m) _WX_VARARG_JOIN_13(m), m(14)
654 #define _WX_VARARG_JOIN_15(m) _WX_VARARG_JOIN_14(m), m(15)
655 #define _WX_VARARG_JOIN_16(m) _WX_VARARG_JOIN_15(m), m(16)
656 #define _WX_VARARG_JOIN_17(m) _WX_VARARG_JOIN_16(m), m(17)
657 #define _WX_VARARG_JOIN_18(m) _WX_VARARG_JOIN_17(m), m(18)
658 #define _WX_VARARG_JOIN_19(m) _WX_VARARG_JOIN_18(m), m(19)
659 #define _WX_VARARG_JOIN_20(m) _WX_VARARG_JOIN_19(m), m(20)
660 #define _WX_VARARG_JOIN_21(m) _WX_VARARG_JOIN_20(m), m(21)
661 #define _WX_VARARG_JOIN_22(m) _WX_VARARG_JOIN_21(m), m(22)
662 #define _WX_VARARG_JOIN_23(m) _WX_VARARG_JOIN_22(m), m(23)
663 #define _WX_VARARG_JOIN_24(m) _WX_VARARG_JOIN_23(m), m(24)
664 #define _WX_VARARG_JOIN_25(m) _WX_VARARG_JOIN_24(m), m(25)
665 #define _WX_VARARG_JOIN_26(m) _WX_VARARG_JOIN_25(m), m(26)
666 #define _WX_VARARG_JOIN_27(m) _WX_VARARG_JOIN_26(m), m(27)
667 #define _WX_VARARG_JOIN_28(m) _WX_VARARG_JOIN_27(m), m(28)
668 #define _WX_VARARG_JOIN_29(m) _WX_VARARG_JOIN_28(m), m(29)
669 #define _WX_VARARG_JOIN_30(m) _WX_VARARG_JOIN_29(m), m(30)
670
671 #define _WX_VARARG_ITER_1(m,a,b,c,d,e,f) m(1,a,b,c,d,e,f)
672 #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)
673 #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)
674 #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)
675 #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)
676 #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)
677 #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)
678 #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)
679 #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)
680 #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)
681 #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)
682 #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)
683 #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)
684 #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)
685 #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)
686 #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)
687 #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)
688 #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)
689 #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)
690 #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)
691 #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)
692 #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)
693 #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)
694 #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)
695 #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)
696 #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)
697 #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)
698 #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)
699 #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)
700 #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)
701
702
703 #define _WX_VARARG_FIXED_EXPAND_1(t1) \
704 t1 f1
705 #define _WX_VARARG_FIXED_EXPAND_2(t1,t2) \
706 t1 f1, t2 f2
707 #define _WX_VARARG_FIXED_EXPAND_3(t1,t2,t3) \
708 t1 f1, t2 f2, t3 f3
709 #define _WX_VARARG_FIXED_EXPAND_4(t1,t2,t3,t4) \
710 t1 f1, t2 f2, t3 f3, t4 f4
711
712 #define _WX_VARARG_FIXED_UNUSED_EXPAND_1(t1) \
713 t1 WXUNUSED(f1)
714 #define _WX_VARARG_FIXED_UNUSED_EXPAND_2(t1,t2) \
715 t1 WXUNUSED(f1), t2 WXUNUSED(f2)
716 #define _WX_VARARG_FIXED_UNUSED_EXPAND_3(t1,t2,t3) \
717 t1 WXUNUSED(f1), t2 WXUNUSED(f2), t3 WXUNUSED(f3)
718 #define _WX_VARARG_FIXED_UNUSED_EXPAND_4(t1,t2,t3,t4) \
719 t1 WXUNUSED(f1), t2 WXUNUSED(f2), t3 WXUNUSED(f3), t4 WXUNUSED(f4)
720
721 #define _WX_VARARG_FIXED_TYPEDEFS_1(t1) \
722 typedef t1 TF1
723 #define _WX_VARARG_FIXED_TYPEDEFS_2(t1,t2) \
724 _WX_VARARG_FIXED_TYPEDEFS_1(t1); typedef t2 TF2
725 #define _WX_VARARG_FIXED_TYPEDEFS_3(t1,t2,t3) \
726 _WX_VARARG_FIXED_TYPEDEFS_2(t1,t2); typedef t3 TF3
727 #define _WX_VARARG_FIXED_TYPEDEFS_4(t1,t2,t3,t4) \
728 _WX_VARARG_FIXED_TYPEDEFS_3(t1,t2,t3); typedef t4 TF4
729
730 // This macro expands N-items tuple of fixed arguments types into part of
731 // function's declaration. For example,
732 // "_WX_VARARG_FIXED_EXPAND(3, (int, char*, int))" expands into
733 // "int f1, char* f2, int f3".
734 #define _WX_VARARG_FIXED_EXPAND(N, args) \
735 _WX_VARARG_FIXED_EXPAND_IMPL(N, args)
736 #define _WX_VARARG_FIXED_EXPAND_IMPL(N, args) \
737 _WX_VARARG_FIXED_EXPAND_##N args
738
739 // Ditto for unused arguments
740 #define _WX_VARARG_FIXED_UNUSED_EXPAND(N, args) \
741 _WX_VARARG_FIXED_UNUSED_EXPAND_IMPL(N, args)
742 #define _WX_VARARG_FIXED_UNUSED_EXPAND_IMPL(N, args) \
743 _WX_VARARG_FIXED_UNUSED_EXPAND_##N args
744
745 // Declarates typedefs for fixed arguments types; i-th fixed argument types
746 // will have TFi typedef.
747 #define _WX_VARARG_FIXED_TYPEDEFS(N, args) \
748 _WX_VARARG_FIXED_TYPEDEFS_IMPL(N, args)
749 #define _WX_VARARG_FIXED_TYPEDEFS_IMPL(N, args) \
750 _WX_VARARG_FIXED_TYPEDEFS_##N args
751
752
753 // This macro calls another macro 'm' passed as second argument 'N' times,
754 // with its only argument set to 1..N, and concatenates the results using
755 // comma as separator.
756 //
757 // An example:
758 // #define foo(i) x##i
759 // // this expands to "x1,x2,x3,x4"
760 // _WX_VARARG_JOIN(4, foo)
761 //
762 //
763 // N must not be greater than _WX_VARARG_MAX_ARGS (=30).
764 #define _WX_VARARG_JOIN(N, m) _WX_VARARG_JOIN_IMPL(N, m)
765 #define _WX_VARARG_JOIN_IMPL(N, m) _WX_VARARG_JOIN_##N(m)
766
767
768 // This macro calls another macro 'm' passed as second argument 'N' times, with
769 // its first argument set to 1..N and the remaining arguments set to 'a', 'b',
770 // 'c', 'd', 'e' and 'f'. The results are separated with whitespace in the
771 // expansion.
772 //
773 // An example:
774 // // this macro expands to:
775 // // foo(1,a,b,c,d,e,f)
776 // // foo(2,a,b,c,d,e,f)
777 // // foo(3,a,b,c,d,e,f)
778 // _WX_VARARG_ITER(3, foo, a, b, c, d, e, f)
779 //
780 // N must not be greater than _WX_VARARG_MAX_ARGS (=30).
781 #define _WX_VARARG_ITER(N,m,a,b,c,d,e,f) \
782 _WX_VARARG_ITER_IMPL(N,m,a,b,c,d,e,f)
783 #define _WX_VARARG_ITER_IMPL(N,m,a,b,c,d,e,f) \
784 _WX_VARARG_ITER_##N(m,a,b,c,d,e,f)
785
786 // Generates code snippet for i-th "variadic" argument in vararg function's
787 // prototype:
788 #define _WX_VARARG_ARG(i) T##i a##i
789
790 // Like _WX_VARARG_ARG_UNUSED, but outputs argument's type with WXUNUSED:
791 #define _WX_VARARG_ARG_UNUSED(i) T##i WXUNUSED(a##i)
792
793 // Generates code snippet for i-th type in vararg function's template<...>:
794 #define _WX_VARARG_TEMPL(i) typename T##i
795
796 // Generates code snippet for passing i-th argument of vararg function
797 // wrapper to its implementation, normalizing it in the process:
798 #define _WX_VARARG_PASS_WCHAR(i) \
799 wxArgNormalizerWchar<T##i>(a##i, fmt, i).get()
800 #define _WX_VARARG_PASS_UTF8(i) \
801 wxArgNormalizerUtf8<T##i>(a##i, fmt, i).get()
802
803
804 // And the same for fixed arguments, _not_ normalizing it:
805 #define _WX_VARARG_PASS_FIXED(i) f##i
806
807 #define _WX_VARARG_FIND_FMT(i) \
808 (wxFormatStringArgumentFinder<TF##i>::find(f##i))
809
810 #define _WX_VARARG_FORMAT_STRING(numfixed, fixed) \
811 _WX_VARARG_FIXED_TYPEDEFS(numfixed, fixed); \
812 const wxFormatString *fmt = \
813 (_WX_VARARG_JOIN(numfixed, _WX_VARARG_FIND_FMT))
814
815 #if wxUSE_UNICODE_UTF8
816 #define _WX_VARARG_DO_CALL_UTF8(return_kw, impl, implUtf8, N, numfixed) \
817 return_kw implUtf8(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED), \
818 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_UTF8))
819 #define _WX_VARARG_DO_CALL0_UTF8(return_kw, impl, implUtf8, numfixed) \
820 return_kw implUtf8(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED))
821 #endif // wxUSE_UNICODE_UTF8
822
823 #define _WX_VARARG_DO_CALL_WCHAR(return_kw, impl, implUtf8, N, numfixed) \
824 return_kw impl(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED), \
825 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WCHAR))
826 #define _WX_VARARG_DO_CALL0_WCHAR(return_kw, impl, implUtf8, numfixed) \
827 return_kw impl(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED))
828
829 #if wxUSE_UNICODE_UTF8
830 #if wxUSE_UTF8_LOCALE_ONLY
831 #define _WX_VARARG_DO_CALL _WX_VARARG_DO_CALL_UTF8
832 #define _WX_VARARG_DO_CALL0 _WX_VARARG_DO_CALL0_UTF8
833 #else // possibly non-UTF8 locales
834 #define _WX_VARARG_DO_CALL(return_kw, impl, implUtf8, N, numfixed) \
835 if ( wxLocaleIsUtf8 ) \
836 _WX_VARARG_DO_CALL_UTF8(return_kw, impl, implUtf8, N, numfixed);\
837 else \
838 _WX_VARARG_DO_CALL_WCHAR(return_kw, impl, implUtf8, N, numfixed)
839
840 #define _WX_VARARG_DO_CALL0(return_kw, impl, implUtf8, numfixed) \
841 if ( wxLocaleIsUtf8 ) \
842 _WX_VARARG_DO_CALL0_UTF8(return_kw, impl, implUtf8, numfixed); \
843 else \
844 _WX_VARARG_DO_CALL0_WCHAR(return_kw, impl, implUtf8, numfixed)
845 #endif // wxUSE_UTF8_LOCALE_ONLY or not
846 #else // wxUSE_UNICODE_WCHAR or ANSI
847 #define _WX_VARARG_DO_CALL _WX_VARARG_DO_CALL_WCHAR
848 #define _WX_VARARG_DO_CALL0 _WX_VARARG_DO_CALL0_WCHAR
849 #endif // wxUSE_UNICODE_UTF8 / wxUSE_UNICODE_WCHAR
850
851
852 // Macro to be used with _WX_VARARG_ITER in the implementation of
853 // WX_DEFINE_VARARG_FUNC (see its documentation for the meaning of arguments)
854 #define _WX_VARARG_DEFINE_FUNC(N, rettype, name, \
855 impl, implUtf8, numfixed, fixed) \
856 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
857 rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
858 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
859 { \
860 _WX_VARARG_FORMAT_STRING(numfixed, fixed); \
861 _WX_VARARG_DO_CALL(return, impl, implUtf8, N, numfixed); \
862 }
863
864 #define _WX_VARARG_DEFINE_FUNC_N0(rettype, name, \
865 impl, implUtf8, numfixed, fixed) \
866 inline rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
867 { \
868 _WX_VARARG_DO_CALL0(return, impl, implUtf8, numfixed); \
869 }
870
871 // Macro to be used with _WX_VARARG_ITER in the implementation of
872 // WX_DEFINE_VARARG_FUNC_VOID (see its documentation for the meaning of
873 // arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
874 // requirements).
875 #define _WX_VARARG_DEFINE_FUNC_VOID(N, rettype, name, \
876 impl, implUtf8, numfixed, fixed) \
877 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
878 void name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
879 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
880 { \
881 _WX_VARARG_FORMAT_STRING(numfixed, fixed); \
882 _WX_VARARG_DO_CALL(wxEMPTY_PARAMETER_VALUE, \
883 impl, implUtf8, N, numfixed); \
884 }
885
886 #define _WX_VARARG_DEFINE_FUNC_VOID_N0(name, impl, implUtf8, numfixed, fixed) \
887 inline void name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
888 { \
889 _WX_VARARG_DO_CALL0(wxEMPTY_PARAMETER_VALUE, \
890 impl, implUtf8, numfixed); \
891 }
892
893 // Macro to be used with _WX_VARARG_ITER in the implementation of
894 // WX_DEFINE_VARARG_FUNC_CTOR (see its documentation for the meaning of
895 // arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
896 // requirements).
897 #define _WX_VARARG_DEFINE_FUNC_CTOR(N, rettype, name, \
898 impl, implUtf8, numfixed, fixed) \
899 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
900 name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
901 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
902 { \
903 _WX_VARARG_FORMAT_STRING(numfixed, fixed); \
904 _WX_VARARG_DO_CALL(wxEMPTY_PARAMETER_VALUE, \
905 impl, implUtf8, N, numfixed); \
906 }
907
908 #define _WX_VARARG_DEFINE_FUNC_CTOR_N0(name, impl, implUtf8, numfixed, fixed) \
909 inline name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
910 { \
911 _WX_VARARG_DO_CALL0(wxEMPTY_PARAMETER_VALUE, \
912 impl, implUtf8, numfixed); \
913 }
914
915 // Macro to be used with _WX_VARARG_ITER in the implementation of
916 // WX_DEFINE_VARARG_FUNC_NOP, i.e. empty stub for a disabled vararg function.
917 // The rettype and impl arguments are ignored.
918 #define _WX_VARARG_DEFINE_FUNC_NOP(N, rettype, name, \
919 impl, implUtf8, numfixed, fixed) \
920 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
921 void name(_WX_VARARG_FIXED_UNUSED_EXPAND(numfixed, fixed), \
922 _WX_VARARG_JOIN(N, _WX_VARARG_ARG_UNUSED)) \
923 {}
924
925 #define _WX_VARARG_DEFINE_FUNC_NOP_N0(name, numfixed, fixed) \
926 inline void name(_WX_VARARG_FIXED_UNUSED_EXPAND(numfixed, fixed)) \
927 {}
928
929
930 // ----------------------------------------------------------------------------
931 // workaround for OpenWatcom bug #351
932 // ----------------------------------------------------------------------------
933
934 #ifdef __WATCOMC__
935 // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
936
937 // This macro can be used to forward a 'vararg' template to another one with
938 // different fixed arguments types. Parameters are same as for
939 // WX_DEFINE_VARARG_FUNC (rettype=void can be used here), 'convfixed' is how
940 // to convert fixed arguments. For example, this is typical code for dealing
941 // with different forms of format string:
942 //
943 // WX_DEFINE_VARARG_FUNC_VOID(Printf, 1, (const wxFormatString&),
944 // DoPrintfWchar, DoPrintfUtf8)
945 // #ifdef __WATCOMC__
946 // WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const wxString&),
947 // (wxFormatString(f1)))
948 // WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const char*),
949 // (wxFormatString(f1)))
950 // ...
951 #define WX_VARARG_WATCOM_WORKAROUND(rettype, name, numfixed, fixed, convfixed)\
952 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
953 _WX_VARARG_WATCOM_WORKAROUND, \
954 rettype, name, convfixed, dummy, numfixed, fixed)
955
956 #define WX_VARARG_WATCOM_WORKAROUND_CTOR(name, numfixed, fixed, convfixed) \
957 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
958 _WX_VARARG_WATCOM_WORKAROUND_CTOR, \
959 dummy, name, convfixed, dummy, numfixed, fixed)
960
961 #define _WX_VARARG_WATCOM_UNPACK_1(a1) a1
962 #define _WX_VARARG_WATCOM_UNPACK_2(a1, a2) a1, a2
963 #define _WX_VARARG_WATCOM_UNPACK_3(a1, a2, a3) a1, a2, a3
964 #define _WX_VARARG_WATCOM_UNPACK_4(a1, a2, a3, a4) a1, a2, a3, a4
965 #define _WX_VARARG_WATCOM_UNPACK(N, convfixed) \
966 _WX_VARARG_WATCOM_UNPACK_##N convfixed
967
968 #define _WX_VARARG_PASS_WATCOM(i) a##i
969
970 #define _WX_VARARG_WATCOM_WORKAROUND(N, rettype, name, \
971 convfixed, dummy, numfixed, fixed) \
972 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
973 rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
974 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
975 { \
976 return name(_WX_VARARG_WATCOM_UNPACK(numfixed, convfixed), \
977 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WATCOM)); \
978 }
979
980 #define _WX_VARARG_WATCOM_WORKAROUND_CTOR(N, dummy1, name, \
981 convfixed, dummy2, numfixed, fixed) \
982 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
983 name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
984 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
985 { \
986 name(_WX_VARARG_WATCOM_UNPACK(numfixed, convfixed), \
987 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WATCOM)); \
988 }
989
990 #endif // __WATCOMC__
991
992 #endif // _WX_STRVARARG_H_
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