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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 : public wxFormatStringArgumentFinder<const wxFormatString&> {};
231
232 // avoid passing big objects by value to wxFormatStringArgumentFinder::find()
233 // (and especially wx[W]CharBuffer with its auto_ptr<> style semantics!):
234 template<>
235 struct wxFormatStringArgumentFinder<wxString>
236 : public wxFormatStringArgumentFinder<const wxString&> {};
237
238 template<>
239 struct wxFormatStringArgumentFinder<wxCharBuffer>
240 : public wxFormatStringArgumentFinder<const wxCharBuffer&> {};
241
242 template<>
243 struct wxFormatStringArgumentFinder<wxWCharBuffer>
244 : public wxFormatStringArgumentFinder<const wxWCharBuffer&> {};
245
246
247 // ----------------------------------------------------------------------------
248 // wxArgNormalizer*<T> converters
249 // ----------------------------------------------------------------------------
250
251 // Converts an argument passed to wxPrint etc. into standard form expected,
252 // by wxXXX functions, e.g. all strings (wxString, char*, wchar_t*) are
253 // converted into wchar_t* or char* depending on the build.
254 template<typename T>
255 struct wxArgNormalizer
256 {
257 // Ctor. 'value' is the value passed as variadic argument, 'fmt' is pointer
258 // to printf-like format string or NULL if the variadic function doesn't
259 // use format string and 'index' is index of 'value' in variadic arguments
260 // list (starting at 1)
261 wxArgNormalizer(T value,
262 const wxFormatString *WXUNUSED(fmt), unsigned WXUNUSED(index))
263 : m_value(value) {}
264
265 // Returns the value in a form that can be safely passed to real vararg
266 // functions. In case of strings, this is char* in ANSI build and wchar_t*
267 // in Unicode build.
268 T get() const { return m_value; }
269
270 T m_value;
271 };
272
273 // normalizer for passing arguments to functions working with wchar_t* (and
274 // until ANSI build is removed, char* in ANSI build as well - FIXME-UTF8)
275 // string representation
276 #if !wxUSE_UTF8_LOCALE_ONLY
277 template<typename T>
278 struct wxArgNormalizerWchar : public wxArgNormalizer<T>
279 {
280 wxArgNormalizerWchar(T value,
281 const wxFormatString *fmt, unsigned index)
282 : wxArgNormalizer<T>(value, fmt, index) {}
283 };
284 #endif // !wxUSE_UTF8_LOCALE_ONLY
285
286 // normalizer for passing arguments to functions working with UTF-8 encoded
287 // char* strings
288 #if wxUSE_UNICODE_UTF8
289 template<typename T>
290 struct wxArgNormalizerUtf8 : public wxArgNormalizer<T>
291 {
292 wxArgNormalizerUtf8(T value,
293 const wxFormatString *fmt, unsigned index)
294 : wxArgNormalizer<T>(value, fmt, index) {}
295 };
296
297 #define wxArgNormalizerNative wxArgNormalizerUtf8
298 #else // wxUSE_UNICODE_WCHAR
299 #define wxArgNormalizerNative wxArgNormalizerWchar
300 #endif // wxUSE_UNICODE_UTF8 // wxUSE_UNICODE_UTF8
301
302
303
304 // special cases for converting strings:
305
306
307 // base class for wxArgNormalizer<T> specializations that need to do conversion;
308 // CharType is either wxStringCharType or wchar_t in UTF-8 build when wrapping
309 // widechar CRT function
310 template<typename CharType>
311 struct wxArgNormalizerWithBuffer
312 {
313 typedef wxCharTypeBuffer<CharType> CharBuffer;
314
315 wxArgNormalizerWithBuffer() {}
316 wxArgNormalizerWithBuffer(const CharBuffer& buf,
317 const wxFormatString *WXUNUSED(fmt),
318 unsigned WXUNUSED(index))
319 : m_value(buf) {}
320
321 const CharType *get() const { return m_value; }
322
323 CharBuffer m_value;
324 };
325
326 // string objects:
327 template<>
328 struct WXDLLIMPEXP_BASE wxArgNormalizerNative<const wxString&>
329 {
330 wxArgNormalizerNative(const wxString& s,
331 const wxFormatString *WXUNUSED(fmt),
332 unsigned WXUNUSED(index))
333 : m_value(s) {}
334
335 const wxStringCharType *get() const;
336
337 const wxString& m_value;
338 };
339
340 // c_str() values:
341 template<>
342 struct WXDLLIMPEXP_BASE wxArgNormalizerNative<const wxCStrData&>
343 {
344 wxArgNormalizerNative(const wxCStrData& value,
345 const wxFormatString *WXUNUSED(fmt),
346 unsigned WXUNUSED(index))
347 : m_value(value) {}
348
349 const wxStringCharType *get() const;
350
351 const wxCStrData& m_value;
352 };
353
354 // wxString/wxCStrData conversion to wchar_t* value
355 #if wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
356 template<>
357 struct WXDLLIMPEXP_BASE wxArgNormalizerWchar<const wxString&>
358 : public wxArgNormalizerWithBuffer<wchar_t>
359 {
360 wxArgNormalizerWchar(const wxString& s,
361 const wxFormatString *fmt, unsigned index);
362 };
363
364 template<>
365 struct WXDLLIMPEXP_BASE wxArgNormalizerWchar<const wxCStrData&>
366 : public wxArgNormalizerWithBuffer<wchar_t>
367 {
368 wxArgNormalizerWchar(const wxCStrData& s,
369 const wxFormatString *fmt, unsigned index);
370 };
371 #endif // wxUSE_UNICODE_UTF8 && !wxUSE_UTF8_LOCALE_ONLY
372
373
374 // C string pointers of the wrong type (wchar_t* for ANSI or UTF8 build,
375 // char* for wchar_t Unicode build or UTF8):
376 #if wxUSE_UNICODE_WCHAR
377
378 template<>
379 struct wxArgNormalizerWchar<const char*>
380 : public wxArgNormalizerWithBuffer<wchar_t>
381 {
382 wxArgNormalizerWchar(const char* s,
383 const wxFormatString *fmt, unsigned index)
384 : wxArgNormalizerWithBuffer<wchar_t>(wxConvLibc.cMB2WC(s), fmt, index) {}
385 };
386
387 #elif wxUSE_UNICODE_UTF8
388
389 template<>
390 struct wxArgNormalizerUtf8<const wchar_t*>
391 : public wxArgNormalizerWithBuffer<char>
392 {
393 wxArgNormalizerUtf8(const wchar_t* s,
394 const wxFormatString *fmt, unsigned index)
395 : wxArgNormalizerWithBuffer<char>(wxConvUTF8.cWC2MB(s), fmt, index) {}
396 };
397
398 template<>
399 struct wxArgNormalizerUtf8<const char*>
400 : public wxArgNormalizerWithBuffer<char>
401 {
402 wxArgNormalizerUtf8(const char* s,
403 const wxFormatString *WXUNUSED(fmt),
404 unsigned WXUNUSED(index))
405 {
406 if ( wxLocaleIsUtf8 )
407 {
408 m_value = wxCharBuffer::CreateNonOwned(s);
409 }
410 else
411 {
412 // convert to widechar string first:
413 wxWCharBuffer buf(wxConvLibc.cMB2WC(s));
414
415 // then to UTF-8:
416 if ( buf )
417 m_value = wxConvUTF8.cWC2MB(buf);
418 }
419 }
420 };
421
422 // UTF-8 build needs conversion to wchar_t* too:
423 #if !wxUSE_UTF8_LOCALE_ONLY
424 template<>
425 struct wxArgNormalizerWchar<const char*>
426 : public wxArgNormalizerWithBuffer<wchar_t>
427 {
428 wxArgNormalizerWchar(const char* s,
429 const wxFormatString *fmt, unsigned index)
430 : wxArgNormalizerWithBuffer<wchar_t>(wxConvLibc.cMB2WC(s), fmt, index) {}
431 };
432 #endif // !wxUSE_UTF8_LOCALE_ONLY
433
434 #else // ANSI - FIXME-UTF8
435
436 template<>
437 struct wxArgNormalizerWchar<const wchar_t*>
438 : public wxArgNormalizerWithBuffer<char>
439 {
440 wxArgNormalizerWchar(const wchar_t* s,
441 const wxFormatString *fmt, unsigned index)
442 : wxArgNormalizerWithBuffer<char>(wxConvLibc.cWC2MB(s), fmt, index) {}
443 };
444
445 #endif // wxUSE_UNICODE_WCHAR/wxUSE_UNICODE_UTF8/ANSI
446
447
448 // this macro is used to implement specialization that are exactly same as
449 // some other specialization, i.e. to "forward" the implementation (e.g. for
450 // T=wxString and T=const wxString&). Note that the ctor takes BaseT argument,
451 // not T!
452 #if wxUSE_UNICODE_UTF8
453 #if wxUSE_UTF8_LOCALE_ONLY
454 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
455 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerUtf8, T, BaseT)
456 #else // possibly non-UTF8 locales
457 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
458 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerWchar, T, BaseT); \
459 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerUtf8, T, BaseT)
460 #endif
461 #else // wxUSE_UNICODE_WCHAR
462 #define WX_ARG_NORMALIZER_FORWARD(T, BaseT) \
463 _WX_ARG_NORMALIZER_FORWARD_IMPL(wxArgNormalizerWchar, T, BaseT)
464 #endif // wxUSE_UNICODE_UTF8/wxUSE_UNICODE_WCHAR
465
466 #define _WX_ARG_NORMALIZER_FORWARD_IMPL(Normalizer, T, BaseT) \
467 template<> \
468 struct Normalizer<T> : public Normalizer<BaseT> \
469 { \
470 Normalizer(BaseT value, \
471 const wxFormatString *fmt, unsigned index) \
472 : Normalizer<BaseT>(value, fmt, index) {} \
473 }
474
475 // non-reference versions of specializations for string objects
476 WX_ARG_NORMALIZER_FORWARD(wxString, const wxString&);
477 WX_ARG_NORMALIZER_FORWARD(wxCStrData, const wxCStrData&);
478
479 // versions for passing non-const pointers:
480 WX_ARG_NORMALIZER_FORWARD(char*, const char*);
481 WX_ARG_NORMALIZER_FORWARD(wchar_t*, const wchar_t*);
482
483 // versions for passing wx[W]CharBuffer:
484 WX_ARG_NORMALIZER_FORWARD(wxCharBuffer, const char*);
485 WX_ARG_NORMALIZER_FORWARD(const wxCharBuffer&, const char*);
486 WX_ARG_NORMALIZER_FORWARD(wxWCharBuffer, const wchar_t*);
487 WX_ARG_NORMALIZER_FORWARD(const wxWCharBuffer&, const wchar_t*);
488
489 // versions for std::[w]string:
490 #if wxUSE_STD_STRING
491
492 #include "wx/stringimpl.h"
493
494 #if !wxUSE_UTF8_LOCALE_ONLY
495 template<>
496 struct wxArgNormalizerWchar<const std::string&>
497 : public wxArgNormalizerWchar<const char*>
498 {
499 wxArgNormalizerWchar(const std::string& s,
500 const wxFormatString *fmt, unsigned index)
501 : wxArgNormalizerWchar<const char*>(s.c_str(), fmt, index) {}
502 };
503
504 template<>
505 struct wxArgNormalizerWchar<const wxStdWideString&>
506 : public wxArgNormalizerWchar<const wchar_t*>
507 {
508 wxArgNormalizerWchar(const wxStdWideString& s,
509 const wxFormatString *fmt, unsigned index)
510 : wxArgNormalizerWchar<const wchar_t*>(s.c_str(), fmt, index) {}
511 };
512 #endif // !wxUSE_UTF8_LOCALE_ONLY
513
514 #if wxUSE_UNICODE_UTF8
515 template<>
516 struct wxArgNormalizerUtf8<const std::string&>
517 : public wxArgNormalizerUtf8<const char*>
518 {
519 wxArgNormalizerUtf8(const std::string& s,
520 const wxFormatString *fmt, unsigned index)
521 : wxArgNormalizerUtf8<const char*>(s.c_str(), fmt, index) {}
522 };
523
524 template<>
525 struct wxArgNormalizerUtf8<const wxStdWideString&>
526 : public wxArgNormalizerUtf8<const wchar_t*>
527 {
528 wxArgNormalizerUtf8(const wxStdWideString& s,
529 const wxFormatString *fmt, unsigned index)
530 : wxArgNormalizerUtf8<const wchar_t*>(s.c_str(), fmt, index) {}
531 };
532 #endif // wxUSE_UNICODE_UTF8
533
534 WX_ARG_NORMALIZER_FORWARD(std::string, const std::string&);
535 WX_ARG_NORMALIZER_FORWARD(wxStdWideString, const wxStdWideString&);
536
537 #endif // wxUSE_STD_STRING
538
539
540 // versions for wxUniChar, wxUniCharRef:
541 // (this is same for UTF-8 and Wchar builds, we just convert to wchar_t)
542 template<>
543 struct wxArgNormalizer<const wxUniChar&> : public wxArgNormalizer<wchar_t>
544 {
545 wxArgNormalizer(const wxUniChar& s,
546 const wxFormatString *fmt, unsigned index)
547 : wxArgNormalizer<wchar_t>(s.GetValue(), fmt, index) {}
548 };
549
550 // for wchar_t, default handler does the right thing
551
552 // char has to be treated differently in Unicode builds: a char argument may
553 // be used either for a character value (which should be converted into
554 // wxUniChar) or as an integer value (which should be left as-is). We take
555 // advantage of the fact that both char and wchar_t are converted into int
556 // in variadic arguments here.
557 #if wxUSE_UNICODE
558 template<typename T>
559 struct wxArgNormalizerNarrowChar
560 {
561 wxArgNormalizerNarrowChar(T value,
562 const wxFormatString *fmt, unsigned index)
563 {
564 // FIXME-UTF8: which one is better default in absence of fmt string
565 // (i.e. when used like e.g. Foo("foo", "bar", 'c', NULL)?
566 if ( !fmt || fmt->GetArgumentType(index) == wxFormatString::Arg_Char )
567 m_value = wxUniChar(value).GetValue();
568 else
569 m_value = value;
570 }
571
572 int get() const { return m_value; }
573
574 T m_value;
575 };
576
577 template<>
578 struct wxArgNormalizer<char> : public wxArgNormalizerNarrowChar<char>
579 {
580 wxArgNormalizer(char value,
581 const wxFormatString *fmt, unsigned index)
582 : wxArgNormalizerNarrowChar<char>(value, fmt, index) {}
583 };
584
585 template<>
586 struct wxArgNormalizer<unsigned char>
587 : public wxArgNormalizerNarrowChar<unsigned char>
588 {
589 wxArgNormalizer(unsigned char value,
590 const wxFormatString *fmt, unsigned index)
591 : wxArgNormalizerNarrowChar<unsigned char>(value, fmt, index) {}
592 };
593
594 #endif // wxUSE_UNICODE
595
596 // convert references:
597 WX_ARG_NORMALIZER_FORWARD(wxUniChar, const wxUniChar&);
598 WX_ARG_NORMALIZER_FORWARD(const wxUniCharRef&, const wxUniChar&);
599 WX_ARG_NORMALIZER_FORWARD(wxUniCharRef, const wxUniChar&);
600 WX_ARG_NORMALIZER_FORWARD(const wchar_t&, wchar_t);
601
602 WX_ARG_NORMALIZER_FORWARD(const char&, char);
603 WX_ARG_NORMALIZER_FORWARD(const unsigned char&, unsigned char);
604
605
606 #undef WX_ARG_NORMALIZER_FORWARD
607 #undef _WX_ARG_NORMALIZER_FORWARD_IMPL
608
609 // ----------------------------------------------------------------------------
610 // WX_VA_ARG_STRING
611 // ----------------------------------------------------------------------------
612
613 // Replacement for va_arg() for use with strings in functions that accept
614 // strings normalized by wxArgNormalizer<T>:
615
616 struct WXDLLIMPEXP_BASE wxArgNormalizedString
617 {
618 wxArgNormalizedString(const void* ptr) : m_ptr(ptr) {}
619
620 // returns true if non-NULL string was passed in
621 bool IsValid() const { return m_ptr != NULL; }
622 operator bool() const { return IsValid(); }
623
624 // extracts the string, returns empty string if NULL was passed in
625 wxString GetString() const;
626 operator wxString() const;
627
628 private:
629 const void *m_ptr;
630 };
631
632 #define WX_VA_ARG_STRING(ap) wxArgNormalizedString(va_arg(ap, const void*))
633
634 // ----------------------------------------------------------------------------
635 // implementation of the WX_DEFINE_VARARG_* macros
636 // ----------------------------------------------------------------------------
637
638 // NB: The vararg emulation code is limited to 30 variadic and 4 fixed
639 // arguments at the moment.
640 // If you need more variadic arguments, you need to
641 // 1) increase the value of _WX_VARARG_MAX_ARGS
642 // 2) add _WX_VARARG_JOIN_* and _WX_VARARG_ITER_* up to the new
643 // _WX_VARARG_MAX_ARGS value to the lists below
644 // If you need more fixed arguments, you need to
645 // 1) increase the value of _WX_VARARG_MAX_FIXED_ARGS
646 // 2) add _WX_VARARG_FIXED_EXPAND_* and _WX_VARARG_FIXED_UNUSED_EXPAND_*
647 // macros below
648 #define _WX_VARARG_MAX_ARGS 30
649 #define _WX_VARARG_MAX_FIXED_ARGS 4
650
651 #define _WX_VARARG_JOIN_1(m) m(1)
652 #define _WX_VARARG_JOIN_2(m) _WX_VARARG_JOIN_1(m), m(2)
653 #define _WX_VARARG_JOIN_3(m) _WX_VARARG_JOIN_2(m), m(3)
654 #define _WX_VARARG_JOIN_4(m) _WX_VARARG_JOIN_3(m), m(4)
655 #define _WX_VARARG_JOIN_5(m) _WX_VARARG_JOIN_4(m), m(5)
656 #define _WX_VARARG_JOIN_6(m) _WX_VARARG_JOIN_5(m), m(6)
657 #define _WX_VARARG_JOIN_7(m) _WX_VARARG_JOIN_6(m), m(7)
658 #define _WX_VARARG_JOIN_8(m) _WX_VARARG_JOIN_7(m), m(8)
659 #define _WX_VARARG_JOIN_9(m) _WX_VARARG_JOIN_8(m), m(9)
660 #define _WX_VARARG_JOIN_10(m) _WX_VARARG_JOIN_9(m), m(10)
661 #define _WX_VARARG_JOIN_11(m) _WX_VARARG_JOIN_10(m), m(11)
662 #define _WX_VARARG_JOIN_12(m) _WX_VARARG_JOIN_11(m), m(12)
663 #define _WX_VARARG_JOIN_13(m) _WX_VARARG_JOIN_12(m), m(13)
664 #define _WX_VARARG_JOIN_14(m) _WX_VARARG_JOIN_13(m), m(14)
665 #define _WX_VARARG_JOIN_15(m) _WX_VARARG_JOIN_14(m), m(15)
666 #define _WX_VARARG_JOIN_16(m) _WX_VARARG_JOIN_15(m), m(16)
667 #define _WX_VARARG_JOIN_17(m) _WX_VARARG_JOIN_16(m), m(17)
668 #define _WX_VARARG_JOIN_18(m) _WX_VARARG_JOIN_17(m), m(18)
669 #define _WX_VARARG_JOIN_19(m) _WX_VARARG_JOIN_18(m), m(19)
670 #define _WX_VARARG_JOIN_20(m) _WX_VARARG_JOIN_19(m), m(20)
671 #define _WX_VARARG_JOIN_21(m) _WX_VARARG_JOIN_20(m), m(21)
672 #define _WX_VARARG_JOIN_22(m) _WX_VARARG_JOIN_21(m), m(22)
673 #define _WX_VARARG_JOIN_23(m) _WX_VARARG_JOIN_22(m), m(23)
674 #define _WX_VARARG_JOIN_24(m) _WX_VARARG_JOIN_23(m), m(24)
675 #define _WX_VARARG_JOIN_25(m) _WX_VARARG_JOIN_24(m), m(25)
676 #define _WX_VARARG_JOIN_26(m) _WX_VARARG_JOIN_25(m), m(26)
677 #define _WX_VARARG_JOIN_27(m) _WX_VARARG_JOIN_26(m), m(27)
678 #define _WX_VARARG_JOIN_28(m) _WX_VARARG_JOIN_27(m), m(28)
679 #define _WX_VARARG_JOIN_29(m) _WX_VARARG_JOIN_28(m), m(29)
680 #define _WX_VARARG_JOIN_30(m) _WX_VARARG_JOIN_29(m), m(30)
681
682 #define _WX_VARARG_ITER_1(m,a,b,c,d,e,f) m(1,a,b,c,d,e,f)
683 #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)
684 #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)
685 #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)
686 #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)
687 #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)
688 #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)
689 #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)
690 #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)
691 #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)
692 #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)
693 #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)
694 #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)
695 #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)
696 #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)
697 #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)
698 #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)
699 #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)
700 #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)
701 #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)
702 #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)
703 #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)
704 #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)
705 #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)
706 #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)
707 #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)
708 #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)
709 #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)
710 #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)
711 #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)
712
713
714 #define _WX_VARARG_FIXED_EXPAND_1(t1) \
715 t1 f1
716 #define _WX_VARARG_FIXED_EXPAND_2(t1,t2) \
717 t1 f1, t2 f2
718 #define _WX_VARARG_FIXED_EXPAND_3(t1,t2,t3) \
719 t1 f1, t2 f2, t3 f3
720 #define _WX_VARARG_FIXED_EXPAND_4(t1,t2,t3,t4) \
721 t1 f1, t2 f2, t3 f3, t4 f4
722
723 #define _WX_VARARG_FIXED_UNUSED_EXPAND_1(t1) \
724 t1 WXUNUSED(f1)
725 #define _WX_VARARG_FIXED_UNUSED_EXPAND_2(t1,t2) \
726 t1 WXUNUSED(f1), t2 WXUNUSED(f2)
727 #define _WX_VARARG_FIXED_UNUSED_EXPAND_3(t1,t2,t3) \
728 t1 WXUNUSED(f1), t2 WXUNUSED(f2), t3 WXUNUSED(f3)
729 #define _WX_VARARG_FIXED_UNUSED_EXPAND_4(t1,t2,t3,t4) \
730 t1 WXUNUSED(f1), t2 WXUNUSED(f2), t3 WXUNUSED(f3), t4 WXUNUSED(f4)
731
732 #define _WX_VARARG_FIXED_TYPEDEFS_1(t1) \
733 typedef t1 TF1
734 #define _WX_VARARG_FIXED_TYPEDEFS_2(t1,t2) \
735 _WX_VARARG_FIXED_TYPEDEFS_1(t1); typedef t2 TF2
736 #define _WX_VARARG_FIXED_TYPEDEFS_3(t1,t2,t3) \
737 _WX_VARARG_FIXED_TYPEDEFS_2(t1,t2); typedef t3 TF3
738 #define _WX_VARARG_FIXED_TYPEDEFS_4(t1,t2,t3,t4) \
739 _WX_VARARG_FIXED_TYPEDEFS_3(t1,t2,t3); typedef t4 TF4
740
741 // This macro expands N-items tuple of fixed arguments types into part of
742 // function's declaration. For example,
743 // "_WX_VARARG_FIXED_EXPAND(3, (int, char*, int))" expands into
744 // "int f1, char* f2, int f3".
745 #define _WX_VARARG_FIXED_EXPAND(N, args) \
746 _WX_VARARG_FIXED_EXPAND_IMPL(N, args)
747 #define _WX_VARARG_FIXED_EXPAND_IMPL(N, args) \
748 _WX_VARARG_FIXED_EXPAND_##N args
749
750 // Ditto for unused arguments
751 #define _WX_VARARG_FIXED_UNUSED_EXPAND(N, args) \
752 _WX_VARARG_FIXED_UNUSED_EXPAND_IMPL(N, args)
753 #define _WX_VARARG_FIXED_UNUSED_EXPAND_IMPL(N, args) \
754 _WX_VARARG_FIXED_UNUSED_EXPAND_##N args
755
756 // Declarates typedefs for fixed arguments types; i-th fixed argument types
757 // will have TFi typedef.
758 #define _WX_VARARG_FIXED_TYPEDEFS(N, args) \
759 _WX_VARARG_FIXED_TYPEDEFS_IMPL(N, args)
760 #define _WX_VARARG_FIXED_TYPEDEFS_IMPL(N, args) \
761 _WX_VARARG_FIXED_TYPEDEFS_##N args
762
763
764 // This macro calls another macro 'm' passed as second argument 'N' times,
765 // with its only argument set to 1..N, and concatenates the results using
766 // comma as separator.
767 //
768 // An example:
769 // #define foo(i) x##i
770 // // this expands to "x1,x2,x3,x4"
771 // _WX_VARARG_JOIN(4, foo)
772 //
773 //
774 // N must not be greater than _WX_VARARG_MAX_ARGS (=30).
775 #define _WX_VARARG_JOIN(N, m) _WX_VARARG_JOIN_IMPL(N, m)
776 #define _WX_VARARG_JOIN_IMPL(N, m) _WX_VARARG_JOIN_##N(m)
777
778
779 // This macro calls another macro 'm' passed as second argument 'N' times, with
780 // its first argument set to 1..N and the remaining arguments set to 'a', 'b',
781 // 'c', 'd', 'e' and 'f'. The results are separated with whitespace in the
782 // expansion.
783 //
784 // An example:
785 // // this macro expands to:
786 // // foo(1,a,b,c,d,e,f)
787 // // foo(2,a,b,c,d,e,f)
788 // // foo(3,a,b,c,d,e,f)
789 // _WX_VARARG_ITER(3, foo, a, b, c, d, e, f)
790 //
791 // N must not be greater than _WX_VARARG_MAX_ARGS (=30).
792 #define _WX_VARARG_ITER(N,m,a,b,c,d,e,f) \
793 _WX_VARARG_ITER_IMPL(N,m,a,b,c,d,e,f)
794 #define _WX_VARARG_ITER_IMPL(N,m,a,b,c,d,e,f) \
795 _WX_VARARG_ITER_##N(m,a,b,c,d,e,f)
796
797 // Generates code snippet for i-th "variadic" argument in vararg function's
798 // prototype:
799 #define _WX_VARARG_ARG(i) T##i a##i
800
801 // Like _WX_VARARG_ARG_UNUSED, but outputs argument's type with WXUNUSED:
802 #define _WX_VARARG_ARG_UNUSED(i) T##i WXUNUSED(a##i)
803
804 // Generates code snippet for i-th type in vararg function's template<...>:
805 #define _WX_VARARG_TEMPL(i) typename T##i
806
807 // Generates code snippet for passing i-th argument of vararg function
808 // wrapper to its implementation, normalizing it in the process:
809 #define _WX_VARARG_PASS_WCHAR(i) \
810 wxArgNormalizerWchar<T##i>(a##i, fmt, i).get()
811 #define _WX_VARARG_PASS_UTF8(i) \
812 wxArgNormalizerUtf8<T##i>(a##i, fmt, i).get()
813
814
815 // And the same for fixed arguments, _not_ normalizing it:
816 #define _WX_VARARG_PASS_FIXED(i) f##i
817
818 #define _WX_VARARG_FIND_FMT(i) \
819 (wxFormatStringArgumentFinder<TF##i>::find(f##i))
820
821 #define _WX_VARARG_FORMAT_STRING(numfixed, fixed) \
822 _WX_VARARG_FIXED_TYPEDEFS(numfixed, fixed); \
823 const wxFormatString *fmt = \
824 (_WX_VARARG_JOIN(numfixed, _WX_VARARG_FIND_FMT))
825
826 #if wxUSE_UNICODE_UTF8
827 #define _WX_VARARG_DO_CALL_UTF8(return_kw, impl, implUtf8, N, numfixed) \
828 return_kw implUtf8(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED), \
829 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_UTF8))
830 #define _WX_VARARG_DO_CALL0_UTF8(return_kw, impl, implUtf8, numfixed) \
831 return_kw implUtf8(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED))
832 #endif // wxUSE_UNICODE_UTF8
833
834 #define _WX_VARARG_DO_CALL_WCHAR(return_kw, impl, implUtf8, N, numfixed) \
835 return_kw impl(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED), \
836 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WCHAR))
837 #define _WX_VARARG_DO_CALL0_WCHAR(return_kw, impl, implUtf8, numfixed) \
838 return_kw impl(_WX_VARARG_JOIN(numfixed, _WX_VARARG_PASS_FIXED))
839
840 #if wxUSE_UNICODE_UTF8
841 #if wxUSE_UTF8_LOCALE_ONLY
842 #define _WX_VARARG_DO_CALL _WX_VARARG_DO_CALL_UTF8
843 #define _WX_VARARG_DO_CALL0 _WX_VARARG_DO_CALL0_UTF8
844 #else // possibly non-UTF8 locales
845 #define _WX_VARARG_DO_CALL(return_kw, impl, implUtf8, N, numfixed) \
846 if ( wxLocaleIsUtf8 ) \
847 _WX_VARARG_DO_CALL_UTF8(return_kw, impl, implUtf8, N, numfixed);\
848 else \
849 _WX_VARARG_DO_CALL_WCHAR(return_kw, impl, implUtf8, N, numfixed)
850
851 #define _WX_VARARG_DO_CALL0(return_kw, impl, implUtf8, numfixed) \
852 if ( wxLocaleIsUtf8 ) \
853 _WX_VARARG_DO_CALL0_UTF8(return_kw, impl, implUtf8, numfixed); \
854 else \
855 _WX_VARARG_DO_CALL0_WCHAR(return_kw, impl, implUtf8, numfixed)
856 #endif // wxUSE_UTF8_LOCALE_ONLY or not
857 #else // wxUSE_UNICODE_WCHAR or ANSI
858 #define _WX_VARARG_DO_CALL _WX_VARARG_DO_CALL_WCHAR
859 #define _WX_VARARG_DO_CALL0 _WX_VARARG_DO_CALL0_WCHAR
860 #endif // wxUSE_UNICODE_UTF8 / wxUSE_UNICODE_WCHAR
861
862
863 // Macro to be used with _WX_VARARG_ITER in the implementation of
864 // WX_DEFINE_VARARG_FUNC (see its documentation for the meaning of arguments)
865 #define _WX_VARARG_DEFINE_FUNC(N, rettype, name, \
866 impl, implUtf8, numfixed, fixed) \
867 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
868 rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
869 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
870 { \
871 _WX_VARARG_FORMAT_STRING(numfixed, fixed); \
872 _WX_VARARG_DO_CALL(return, impl, implUtf8, N, numfixed); \
873 }
874
875 #define _WX_VARARG_DEFINE_FUNC_N0(rettype, name, \
876 impl, implUtf8, numfixed, fixed) \
877 inline rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
878 { \
879 _WX_VARARG_DO_CALL0(return, impl, implUtf8, numfixed); \
880 }
881
882 // Macro to be used with _WX_VARARG_ITER in the implementation of
883 // WX_DEFINE_VARARG_FUNC_VOID (see its documentation for the meaning of
884 // arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
885 // requirements).
886 #define _WX_VARARG_DEFINE_FUNC_VOID(N, rettype, name, \
887 impl, implUtf8, numfixed, fixed) \
888 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
889 void name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
890 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
891 { \
892 _WX_VARARG_FORMAT_STRING(numfixed, fixed); \
893 _WX_VARARG_DO_CALL(wxEMPTY_PARAMETER_VALUE, \
894 impl, implUtf8, N, numfixed); \
895 }
896
897 #define _WX_VARARG_DEFINE_FUNC_VOID_N0(name, impl, implUtf8, numfixed, fixed) \
898 inline void name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
899 { \
900 _WX_VARARG_DO_CALL0(wxEMPTY_PARAMETER_VALUE, \
901 impl, implUtf8, numfixed); \
902 }
903
904 // Macro to be used with _WX_VARARG_ITER in the implementation of
905 // WX_DEFINE_VARARG_FUNC_CTOR (see its documentation for the meaning of
906 // arguments; rettype is ignored and is used only to satisfy _WX_VARARG_ITER's
907 // requirements).
908 #define _WX_VARARG_DEFINE_FUNC_CTOR(N, rettype, name, \
909 impl, implUtf8, numfixed, fixed) \
910 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
911 name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
912 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
913 { \
914 _WX_VARARG_FORMAT_STRING(numfixed, fixed); \
915 _WX_VARARG_DO_CALL(wxEMPTY_PARAMETER_VALUE, \
916 impl, implUtf8, N, numfixed); \
917 }
918
919 #define _WX_VARARG_DEFINE_FUNC_CTOR_N0(name, impl, implUtf8, numfixed, fixed) \
920 inline name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed)) \
921 { \
922 _WX_VARARG_DO_CALL0(wxEMPTY_PARAMETER_VALUE, \
923 impl, implUtf8, numfixed); \
924 }
925
926 // Macro to be used with _WX_VARARG_ITER in the implementation of
927 // WX_DEFINE_VARARG_FUNC_NOP, i.e. empty stub for a disabled vararg function.
928 // The rettype and impl arguments are ignored.
929 #define _WX_VARARG_DEFINE_FUNC_NOP(N, rettype, name, \
930 impl, implUtf8, numfixed, fixed) \
931 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
932 void name(_WX_VARARG_FIXED_UNUSED_EXPAND(numfixed, fixed), \
933 _WX_VARARG_JOIN(N, _WX_VARARG_ARG_UNUSED)) \
934 {}
935
936 #define _WX_VARARG_DEFINE_FUNC_NOP_N0(name, numfixed, fixed) \
937 inline void name(_WX_VARARG_FIXED_UNUSED_EXPAND(numfixed, fixed)) \
938 {}
939
940
941 // ----------------------------------------------------------------------------
942 // workaround for OpenWatcom bug #351
943 // ----------------------------------------------------------------------------
944
945 #ifdef __WATCOMC__
946 // workaround for http://bugzilla.openwatcom.org/show_bug.cgi?id=351
947
948 // This macro can be used to forward a 'vararg' template to another one with
949 // different fixed arguments types. Parameters are same as for
950 // WX_DEFINE_VARARG_FUNC (rettype=void can be used here), 'convfixed' is how
951 // to convert fixed arguments. For example, this is typical code for dealing
952 // with different forms of format string:
953 //
954 // WX_DEFINE_VARARG_FUNC_VOID(Printf, 1, (const wxFormatString&),
955 // DoPrintfWchar, DoPrintfUtf8)
956 // #ifdef __WATCOMC__
957 // WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const wxString&),
958 // (wxFormatString(f1)))
959 // WX_VARARG_WATCOM_WORKAROUND(void, Printf, 1, (const char*),
960 // (wxFormatString(f1)))
961 // ...
962 #define WX_VARARG_WATCOM_WORKAROUND(rettype, name, numfixed, fixed, convfixed)\
963 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
964 _WX_VARARG_WATCOM_WORKAROUND, \
965 rettype, name, convfixed, dummy, numfixed, fixed)
966
967 #define WX_VARARG_WATCOM_WORKAROUND_CTOR(name, numfixed, fixed, convfixed) \
968 _WX_VARARG_ITER(_WX_VARARG_MAX_ARGS, \
969 _WX_VARARG_WATCOM_WORKAROUND_CTOR, \
970 dummy, name, convfixed, dummy, numfixed, fixed)
971
972 #define _WX_VARARG_WATCOM_UNPACK_1(a1) a1
973 #define _WX_VARARG_WATCOM_UNPACK_2(a1, a2) a1, a2
974 #define _WX_VARARG_WATCOM_UNPACK_3(a1, a2, a3) a1, a2, a3
975 #define _WX_VARARG_WATCOM_UNPACK_4(a1, a2, a3, a4) a1, a2, a3, a4
976 #define _WX_VARARG_WATCOM_UNPACK(N, convfixed) \
977 _WX_VARARG_WATCOM_UNPACK_##N convfixed
978
979 #define _WX_VARARG_PASS_WATCOM(i) a##i
980
981 #define _WX_VARARG_WATCOM_WORKAROUND(N, rettype, name, \
982 convfixed, dummy, numfixed, fixed) \
983 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
984 rettype name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
985 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
986 { \
987 return name(_WX_VARARG_WATCOM_UNPACK(numfixed, convfixed), \
988 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WATCOM)); \
989 }
990
991 #define _WX_VARARG_WATCOM_WORKAROUND_CTOR(N, dummy1, name, \
992 convfixed, dummy2, numfixed, fixed) \
993 template<_WX_VARARG_JOIN(N, _WX_VARARG_TEMPL)> \
994 name(_WX_VARARG_FIXED_EXPAND(numfixed, fixed), \
995 _WX_VARARG_JOIN(N, _WX_VARARG_ARG)) \
996 { \
997 name(_WX_VARARG_WATCOM_UNPACK(numfixed, convfixed), \
998 _WX_VARARG_JOIN(N, _WX_VARARG_PASS_WATCOM)); \
999 }
1000
1001 #endif // __WATCOMC__
1002
1003 #endif // _WX_STRVARARG_H_
wxWidgets (Impactor)