Line data Source code
1 : // tinyformat.h
2 : // Copyright (C) 2011, Chris Foster [chris42f (at) gmail (d0t) com]
3 : //
4 : // Boost Software License - Version 1.0
5 : //
6 : // Permission is hereby granted, free of charge, to any person or organization
7 : // obtaining a copy of the software and accompanying documentation covered by
8 : // this license (the "Software") to use, reproduce, display, distribute,
9 : // execute, and transmit the Software, and to prepare derivative works of the
10 : // Software, and to permit third-parties to whom the Software is furnished to
11 : // do so, all subject to the following:
12 : //
13 : // The copyright notices in the Software and this entire statement, including
14 : // the above license grant, this restriction and the following disclaimer,
15 : // must be included in all copies of the Software, in whole or in part, and
16 : // all derivative works of the Software, unless such copies or derivative
17 : // works are solely in the form of machine-executable object code generated by
18 : // a source language processor.
19 : //
20 : // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
21 : // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 : // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
23 : // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
24 : // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
25 : // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
26 : // DEALINGS IN THE SOFTWARE.
27 :
28 : //------------------------------------------------------------------------------
29 : // Tinyformat: A minimal type safe printf replacement
30 : //
31 : // tinyformat.h is a type safe printf replacement library in a single C++
32 : // header file. Design goals include:
33 : //
34 : // * Type safety and extensibility for user defined types.
35 : // * C99 printf() compatibility, to the extent possible using std::ostream
36 : // * POSIX extension for positional arguments
37 : // * Simplicity and minimalism. A single header file to include and distribute
38 : // with your projects.
39 : // * Augment rather than replace the standard stream formatting mechanism
40 : // * C++98 support, with optional C++11 niceties
41 : //
42 : //
43 : // Main interface example usage
44 : // ----------------------------
45 : //
46 : // To print a date to std::cout for American usage:
47 : //
48 : // std::string weekday = "Wednesday";
49 : // const char* month = "July";
50 : // size_t day = 27;
51 : // long hour = 14;
52 : // int min = 44;
53 : //
54 : // tfm::printf("%s, %s %d, %.2d:%.2d\n", weekday, month, day, hour, min);
55 : //
56 : // POSIX extension for positional arguments is available.
57 : // The ability to rearrange formatting arguments is an important feature
58 : // for localization because the word order may vary in different languages.
59 : //
60 : // Previous example for German usage. Arguments are reordered:
61 : //
62 : // tfm::printf("%1$s, %3$d. %2$s, %4$d:%5$.2d\n", weekday, month, day, hour, min);
63 : //
64 : // The strange types here emphasize the type safety of the interface; it is
65 : // possible to print a std::string using the "%s" conversion, and a
66 : // size_t using the "%d" conversion. A similar result could be achieved
67 : // using either of the tfm::format() functions. One prints on a user provided
68 : // stream:
69 : //
70 : // tfm::format(std::cerr, "%s, %s %d, %.2d:%.2d\n",
71 : // weekday, month, day, hour, min);
72 : //
73 : // The other returns a std::string:
74 : //
75 : // std::string date = tfm::format("%s, %s %d, %.2d:%.2d\n",
76 : // weekday, month, day, hour, min);
77 : // std::cout << date;
78 : //
79 : // These are the three primary interface functions. There is also a
80 : // convenience function printfln() which appends a newline to the usual result
81 : // of printf() for super simple logging.
82 : //
83 : //
84 : // User defined format functions
85 : // -----------------------------
86 : //
87 : // Simulating variadic templates in C++98 is pretty painful since it requires
88 : // writing out the same function for each desired number of arguments. To make
89 : // this bearable tinyformat comes with a set of macros which are used
90 : // internally to generate the API, but which may also be used in user code.
91 : //
92 : // The three macros TINYFORMAT_ARGTYPES(n), TINYFORMAT_VARARGS(n) and
93 : // TINYFORMAT_PASSARGS(n) will generate a list of n argument types,
94 : // type/name pairs and argument names respectively when called with an integer
95 : // n between 1 and 16. We can use these to define a macro which generates the
96 : // desired user defined function with n arguments. To generate all 16 user
97 : // defined function bodies, use the macro TINYFORMAT_FOREACH_ARGNUM. For an
98 : // example, see the implementation of printf() at the end of the source file.
99 : //
100 : // Sometimes it's useful to be able to pass a list of format arguments through
101 : // to a non-template function. The FormatList class is provided as a way to do
102 : // this by storing the argument list in a type-opaque way. Continuing the
103 : // example from above, we construct a FormatList using makeFormatList():
104 : //
105 : // FormatListRef formatList = tfm::makeFormatList(weekday, month, day, hour, min);
106 : //
107 : // The format list can now be passed into any non-template function and used
108 : // via a call to the vformat() function:
109 : //
110 : // tfm::vformat(std::cout, "%s, %s %d, %.2d:%.2d\n", formatList);
111 : //
112 : //
113 : // Additional API information
114 : // --------------------------
115 : //
116 : // Error handling: Define TINYFORMAT_ERROR to customize the error handling for
117 : // format strings which are unsupported or have the wrong number of format
118 : // specifiers (calls assert() by default).
119 : //
120 : // User defined types: Uses operator<< for user defined types by default.
121 : // Overload formatValue() for more control.
122 :
123 :
124 : #ifndef TINYFORMAT_H_INCLUDED
125 : #define TINYFORMAT_H_INCLUDED
126 :
127 : namespace tinyformat {}
128 : //------------------------------------------------------------------------------
129 : // Config section. Customize to your liking!
130 :
131 : // Namespace alias to encourage brevity
132 : namespace tfm = tinyformat;
133 :
134 : // Error handling; calls assert() by default.
135 : #define TINYFORMAT_ERROR(reasonString) throw tinyformat::format_error(reasonString)
136 :
137 : // Define for C++11 variadic templates which make the code shorter & more
138 : // general. If you don't define this, C++11 support is autodetected below.
139 : #define TINYFORMAT_USE_VARIADIC_TEMPLATES
140 :
141 :
142 : //------------------------------------------------------------------------------
143 : // Implementation details.
144 : #include <algorithm>
145 : #include <iostream>
146 : #include <sstream>
147 : #include <stdexcept> // Added for Bitcoin Core
148 :
149 : #ifndef TINYFORMAT_ASSERT
150 : # include <cassert>
151 : # define TINYFORMAT_ASSERT(cond) assert(cond)
152 : #endif
153 :
154 : #ifndef TINYFORMAT_ERROR
155 : # include <cassert>
156 : # define TINYFORMAT_ERROR(reason) assert(0 && reason)
157 : #endif
158 :
159 : #if !defined(TINYFORMAT_USE_VARIADIC_TEMPLATES) && !defined(TINYFORMAT_NO_VARIADIC_TEMPLATES)
160 : # ifdef __GXX_EXPERIMENTAL_CXX0X__
161 : # define TINYFORMAT_USE_VARIADIC_TEMPLATES
162 : # endif
163 : #endif
164 :
165 : #if defined(__GLIBCXX__) && __GLIBCXX__ < 20080201
166 : // std::showpos is broken on old libstdc++ as provided with macOS. See
167 : // http://gcc.gnu.org/ml/libstdc++/2007-11/msg00075.html
168 : # define TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
169 : #endif
170 :
171 : #ifdef __APPLE__
172 : // Workaround macOS linker warning: Xcode uses different default symbol
173 : // visibilities for static libs vs executables (see issue #25)
174 : # define TINYFORMAT_HIDDEN __attribute__((visibility("hidden")))
175 : #else
176 : # define TINYFORMAT_HIDDEN
177 : #endif
178 :
179 : namespace tinyformat {
180 :
181 : // Added for Bitcoin Core
182 : class format_error: public std::runtime_error
183 : {
184 : public:
185 0 : explicit format_error(const std::string &what): std::runtime_error(what) {
186 0 : }
187 : };
188 :
189 : //------------------------------------------------------------------------------
190 : namespace detail {
191 :
192 : // Test whether type T1 is convertible to type T2
193 : template <typename T1, typename T2>
194 : struct is_convertible
195 : {
196 : private:
197 : // two types of different size
198 : struct fail { char dummy[2]; };
199 : struct succeed { char dummy; };
200 : // Try to convert a T1 to a T2 by plugging into tryConvert
201 : static fail tryConvert(...);
202 : static succeed tryConvert(const T2&);
203 : static const T1& makeT1();
204 : public:
205 : # ifdef _MSC_VER
206 : // Disable spurious loss of precision warnings in tryConvert(makeT1())
207 : # pragma warning(push)
208 : # pragma warning(disable:4244)
209 : # pragma warning(disable:4267)
210 : # endif
211 : // Standard trick: the (...) version of tryConvert will be chosen from
212 : // the overload set only if the version taking a T2 doesn't match.
213 : // Then we compare the sizes of the return types to check which
214 : // function matched. Very neat, in a disgusting kind of way :)
215 : static const bool value =
216 : sizeof(tryConvert(makeT1())) == sizeof(succeed);
217 : # ifdef _MSC_VER
218 : # pragma warning(pop)
219 : # endif
220 : };
221 :
222 :
223 : // Detect when a type is not a wchar_t string
224 : template<typename T> struct is_wchar { typedef int tinyformat_wchar_is_not_supported; };
225 : template<> struct is_wchar<wchar_t*> {};
226 : template<> struct is_wchar<const wchar_t*> {};
227 : template<int n> struct is_wchar<const wchar_t[n]> {};
228 : template<int n> struct is_wchar<wchar_t[n]> {};
229 :
230 :
231 : // Format the value by casting to type fmtT. This default implementation
232 : // should never be called.
233 : template<typename T, typename fmtT, bool convertible = is_convertible<T, fmtT>::value>
234 : struct formatValueAsType
235 : {
236 : static void invoke(std::ostream& /*out*/, const T& /*value*/) { TINYFORMAT_ASSERT(0); }
237 : };
238 : // Specialized version for types that can actually be converted to fmtT, as
239 : // indicated by the "convertible" template parameter.
240 : template<typename T, typename fmtT>
241 : struct formatValueAsType<T,fmtT,true>
242 : {
243 0 : static void invoke(std::ostream& out, const T& value)
244 0 : { out << static_cast<fmtT>(value); }
245 : };
246 :
247 : #ifdef TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
248 : template<typename T, bool convertible = is_convertible<T, int>::value>
249 : struct formatZeroIntegerWorkaround
250 : {
251 : static bool invoke(std::ostream& /**/, const T& /**/) { return false; }
252 : };
253 : template<typename T>
254 : struct formatZeroIntegerWorkaround<T,true>
255 : {
256 : static bool invoke(std::ostream& out, const T& value)
257 : {
258 : if (static_cast<int>(value) == 0 && out.flags() & std::ios::showpos) {
259 : out << "+0";
260 : return true;
261 : }
262 : return false;
263 : }
264 : };
265 : #endif // TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
266 :
267 : // Convert an arbitrary type to integer. The version with convertible=false
268 : // throws an error.
269 : template<typename T, bool convertible = is_convertible<T,int>::value>
270 : struct convertToInt
271 : {
272 0 : static int invoke(const T& /*value*/)
273 : {
274 0 : TINYFORMAT_ERROR("tinyformat: Cannot convert from argument type to "
275 : "integer for use as variable width or precision");
276 : return 0;
277 0 : }
278 : };
279 : // Specialization for convertToInt when conversion is possible
280 : template<typename T>
281 : struct convertToInt<T,true>
282 : {
283 0 : static int invoke(const T& value) { return static_cast<int>(value); }
284 : };
285 :
286 : // Format at most ntrunc characters to the given stream.
287 : template<typename T>
288 0 : inline void formatTruncated(std::ostream& out, const T& value, int ntrunc)
289 : {
290 0 : std::ostringstream tmp;
291 0 : tmp << value;
292 0 : std::string result = tmp.str();
293 0 : out.write(result.c_str(), (std::min)(ntrunc, static_cast<int>(result.size())));
294 0 : }
295 : #define TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(type) \
296 : inline void formatTruncated(std::ostream& out, type* value, int ntrunc) \
297 : { \
298 : std::streamsize len = 0; \
299 : while (len < ntrunc && value[len] != 0) \
300 : ++len; \
301 : out.write(value, len); \
302 : }
303 : // Overload for const char* and char*. Could overload for signed & unsigned
304 : // char too, but these are technically unneeded for printf compatibility.
305 0 : TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(const char)
306 0 : TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR(char)
307 : #undef TINYFORMAT_DEFINE_FORMAT_TRUNCATED_CSTR
308 :
309 : } // namespace detail
310 :
311 :
312 : //------------------------------------------------------------------------------
313 : // Variable formatting functions. May be overridden for user-defined types if
314 : // desired.
315 :
316 :
317 : /// Format a value into a stream, delegating to operator<< by default.
318 : ///
319 : /// Users may override this for their own types. When this function is called,
320 : /// the stream flags will have been modified according to the format string.
321 : /// The format specification is provided in the range [fmtBegin, fmtEnd). For
322 : /// truncating conversions, ntrunc is set to the desired maximum number of
323 : /// characters, for example "%.7s" calls formatValue with ntrunc = 7.
324 : ///
325 : /// By default, formatValue() uses the usual stream insertion operator
326 : /// operator<< to format the type T, with special cases for the %c and %p
327 : /// conversions.
328 : template<typename T>
329 16427 : inline void formatValue(std::ostream& out, const char* /*fmtBegin*/,
330 : const char* fmtEnd, int ntrunc, const T& value)
331 : {
332 : #ifndef TINYFORMAT_ALLOW_WCHAR_STRINGS
333 : // Since we don't support printing of wchar_t using "%ls", make it fail at
334 : // compile time in preference to printing as a void* at runtime.
335 : typedef typename detail::is_wchar<T>::tinyformat_wchar_is_not_supported DummyType;
336 : (void) DummyType(); // avoid unused type warning with gcc-4.8
337 : #endif
338 : // The mess here is to support the %c and %p conversions: if these
339 : // conversions are active we try to convert the type to a char or const
340 : // void* respectively and format that instead of the value itself. For the
341 : // %p conversion it's important to avoid dereferencing the pointer, which
342 : // could otherwise lead to a crash when printing a dangling (const char*).
343 16427 : const bool canConvertToChar = detail::is_convertible<T,char>::value;
344 16427 : const bool canConvertToVoidPtr = detail::is_convertible<T, const void*>::value;
345 14569 : if (canConvertToChar && *(fmtEnd-1) == 'c')
346 0 : detail::formatValueAsType<T, char>::invoke(out, value);
347 417 : else if (canConvertToVoidPtr && *(fmtEnd-1) == 'p')
348 0 : detail::formatValueAsType<T, const void*>::invoke(out, value);
349 : #ifdef TINYFORMAT_OLD_LIBSTDCPLUSPLUS_WORKAROUND
350 : else if (detail::formatZeroIntegerWorkaround<T>::invoke(out, value)) /**/;
351 : #endif
352 16427 : else if (ntrunc >= 0) {
353 : // Take care not to overread C strings in truncating conversions like
354 : // "%.4s" where at most 4 characters may be read.
355 0 : detail::formatTruncated(out, value, ntrunc);
356 0 : }
357 : else
358 16427 : out << value;
359 16427 : }
360 :
361 :
362 : // Overloaded version for char types to support printing as an integer
363 : #define TINYFORMAT_DEFINE_FORMATVALUE_CHAR(charType) \
364 : inline void formatValue(std::ostream& out, const char* /*fmtBegin*/, \
365 : const char* fmtEnd, int /**/, charType value) \
366 : { \
367 : switch (*(fmtEnd-1)) { \
368 : case 'u': case 'd': case 'i': case 'o': case 'X': case 'x': \
369 : out << static_cast<int>(value); break; \
370 : default: \
371 : out << value; break; \
372 : } \
373 : }
374 : // per 3.9.1: char, signed char and unsigned char are all distinct types
375 0 : TINYFORMAT_DEFINE_FORMATVALUE_CHAR(char)
376 0 : TINYFORMAT_DEFINE_FORMATVALUE_CHAR(signed char)
377 0 : TINYFORMAT_DEFINE_FORMATVALUE_CHAR(unsigned char)
378 : #undef TINYFORMAT_DEFINE_FORMATVALUE_CHAR
379 :
380 :
381 : //------------------------------------------------------------------------------
382 : // Tools for emulating variadic templates in C++98. The basic idea here is
383 : // stolen from the boost preprocessor metaprogramming library and cut down to
384 : // be just general enough for what we need.
385 :
386 : #define TINYFORMAT_ARGTYPES(n) TINYFORMAT_ARGTYPES_ ## n
387 : #define TINYFORMAT_VARARGS(n) TINYFORMAT_VARARGS_ ## n
388 : #define TINYFORMAT_PASSARGS(n) TINYFORMAT_PASSARGS_ ## n
389 : #define TINYFORMAT_PASSARGS_TAIL(n) TINYFORMAT_PASSARGS_TAIL_ ## n
390 :
391 : // To keep it as transparent as possible, the macros below have been generated
392 : // using python via the excellent cog.py code generation script. This avoids
393 : // the need for a bunch of complex (but more general) preprocessor tricks as
394 : // used in boost.preprocessor.
395 : //
396 : // To rerun the code generation in place, use `cog.py -r tinyformat.h`
397 : // (see http://nedbatchelder.com/code/cog). Alternatively you can just create
398 : // extra versions by hand.
399 :
400 : /*[[[cog
401 : maxParams = 16
402 :
403 : def makeCommaSepLists(lineTemplate, elemTemplate, startInd=1):
404 : for j in range(startInd,maxParams+1):
405 : list = ', '.join([elemTemplate % {'i':i} for i in range(startInd,j+1)])
406 : cog.outl(lineTemplate % {'j':j, 'list':list})
407 :
408 : makeCommaSepLists('#define TINYFORMAT_ARGTYPES_%(j)d %(list)s',
409 : 'class T%(i)d')
410 :
411 : cog.outl()
412 : makeCommaSepLists('#define TINYFORMAT_VARARGS_%(j)d %(list)s',
413 : 'const T%(i)d& v%(i)d')
414 :
415 : cog.outl()
416 : makeCommaSepLists('#define TINYFORMAT_PASSARGS_%(j)d %(list)s', 'v%(i)d')
417 :
418 : cog.outl()
419 : cog.outl('#define TINYFORMAT_PASSARGS_TAIL_1')
420 : makeCommaSepLists('#define TINYFORMAT_PASSARGS_TAIL_%(j)d , %(list)s',
421 : 'v%(i)d', startInd = 2)
422 :
423 : cog.outl()
424 : cog.outl('#define TINYFORMAT_FOREACH_ARGNUM(m) \\\n ' +
425 : ' '.join(['m(%d)' % (j,) for j in range(1,maxParams+1)]))
426 : ]]]*/
427 : #define TINYFORMAT_ARGTYPES_1 class T1
428 : #define TINYFORMAT_ARGTYPES_2 class T1, class T2
429 : #define TINYFORMAT_ARGTYPES_3 class T1, class T2, class T3
430 : #define TINYFORMAT_ARGTYPES_4 class T1, class T2, class T3, class T4
431 : #define TINYFORMAT_ARGTYPES_5 class T1, class T2, class T3, class T4, class T5
432 : #define TINYFORMAT_ARGTYPES_6 class T1, class T2, class T3, class T4, class T5, class T6
433 : #define TINYFORMAT_ARGTYPES_7 class T1, class T2, class T3, class T4, class T5, class T6, class T7
434 : #define TINYFORMAT_ARGTYPES_8 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8
435 : #define TINYFORMAT_ARGTYPES_9 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9
436 : #define TINYFORMAT_ARGTYPES_10 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10
437 : #define TINYFORMAT_ARGTYPES_11 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11
438 : #define TINYFORMAT_ARGTYPES_12 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12
439 : #define TINYFORMAT_ARGTYPES_13 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13
440 : #define TINYFORMAT_ARGTYPES_14 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13, class T14
441 : #define TINYFORMAT_ARGTYPES_15 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13, class T14, class T15
442 : #define TINYFORMAT_ARGTYPES_16 class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class T11, class T12, class T13, class T14, class T15, class T16
443 :
444 : #define TINYFORMAT_VARARGS_1 const T1& v1
445 : #define TINYFORMAT_VARARGS_2 const T1& v1, const T2& v2
446 : #define TINYFORMAT_VARARGS_3 const T1& v1, const T2& v2, const T3& v3
447 : #define TINYFORMAT_VARARGS_4 const T1& v1, const T2& v2, const T3& v3, const T4& v4
448 : #define TINYFORMAT_VARARGS_5 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5
449 : #define TINYFORMAT_VARARGS_6 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6
450 : #define TINYFORMAT_VARARGS_7 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7
451 : #define TINYFORMAT_VARARGS_8 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8
452 : #define TINYFORMAT_VARARGS_9 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9
453 : #define TINYFORMAT_VARARGS_10 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10
454 : #define TINYFORMAT_VARARGS_11 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11
455 : #define TINYFORMAT_VARARGS_12 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12
456 : #define TINYFORMAT_VARARGS_13 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13
457 : #define TINYFORMAT_VARARGS_14 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13, const T14& v14
458 : #define TINYFORMAT_VARARGS_15 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13, const T14& v14, const T15& v15
459 : #define TINYFORMAT_VARARGS_16 const T1& v1, const T2& v2, const T3& v3, const T4& v4, const T5& v5, const T6& v6, const T7& v7, const T8& v8, const T9& v9, const T10& v10, const T11& v11, const T12& v12, const T13& v13, const T14& v14, const T15& v15, const T16& v16
460 :
461 : #define TINYFORMAT_PASSARGS_1 v1
462 : #define TINYFORMAT_PASSARGS_2 v1, v2
463 : #define TINYFORMAT_PASSARGS_3 v1, v2, v3
464 : #define TINYFORMAT_PASSARGS_4 v1, v2, v3, v4
465 : #define TINYFORMAT_PASSARGS_5 v1, v2, v3, v4, v5
466 : #define TINYFORMAT_PASSARGS_6 v1, v2, v3, v4, v5, v6
467 : #define TINYFORMAT_PASSARGS_7 v1, v2, v3, v4, v5, v6, v7
468 : #define TINYFORMAT_PASSARGS_8 v1, v2, v3, v4, v5, v6, v7, v8
469 : #define TINYFORMAT_PASSARGS_9 v1, v2, v3, v4, v5, v6, v7, v8, v9
470 : #define TINYFORMAT_PASSARGS_10 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10
471 : #define TINYFORMAT_PASSARGS_11 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11
472 : #define TINYFORMAT_PASSARGS_12 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12
473 : #define TINYFORMAT_PASSARGS_13 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13
474 : #define TINYFORMAT_PASSARGS_14 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14
475 : #define TINYFORMAT_PASSARGS_15 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15
476 : #define TINYFORMAT_PASSARGS_16 v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16
477 :
478 : #define TINYFORMAT_PASSARGS_TAIL_1
479 : #define TINYFORMAT_PASSARGS_TAIL_2 , v2
480 : #define TINYFORMAT_PASSARGS_TAIL_3 , v2, v3
481 : #define TINYFORMAT_PASSARGS_TAIL_4 , v2, v3, v4
482 : #define TINYFORMAT_PASSARGS_TAIL_5 , v2, v3, v4, v5
483 : #define TINYFORMAT_PASSARGS_TAIL_6 , v2, v3, v4, v5, v6
484 : #define TINYFORMAT_PASSARGS_TAIL_7 , v2, v3, v4, v5, v6, v7
485 : #define TINYFORMAT_PASSARGS_TAIL_8 , v2, v3, v4, v5, v6, v7, v8
486 : #define TINYFORMAT_PASSARGS_TAIL_9 , v2, v3, v4, v5, v6, v7, v8, v9
487 : #define TINYFORMAT_PASSARGS_TAIL_10 , v2, v3, v4, v5, v6, v7, v8, v9, v10
488 : #define TINYFORMAT_PASSARGS_TAIL_11 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11
489 : #define TINYFORMAT_PASSARGS_TAIL_12 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12
490 : #define TINYFORMAT_PASSARGS_TAIL_13 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13
491 : #define TINYFORMAT_PASSARGS_TAIL_14 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14
492 : #define TINYFORMAT_PASSARGS_TAIL_15 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15
493 : #define TINYFORMAT_PASSARGS_TAIL_16 , v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12, v13, v14, v15, v16
494 :
495 : #define TINYFORMAT_FOREACH_ARGNUM(m) \
496 : m(1) m(2) m(3) m(4) m(5) m(6) m(7) m(8) m(9) m(10) m(11) m(12) m(13) m(14) m(15) m(16)
497 : //[[[end]]]
498 :
499 :
500 :
501 : namespace detail {
502 :
503 : // Type-opaque holder for an argument to format(), with associated actions on
504 : // the type held as explicit function pointers. This allows FormatArg's for
505 : // each argument to be allocated as a homogeneous array inside FormatList
506 : // whereas a naive implementation based on inheritance does not.
507 : class FormatArg
508 : {
509 : public:
510 : FormatArg()
511 : { }
512 :
513 : template<typename T>
514 16427 : explicit FormatArg(const T& value)
515 16427 : : m_value(static_cast<const void*>(&value)),
516 16427 : m_formatImpl(&formatImpl<T>),
517 16427 : m_toIntImpl(&toIntImpl<T>)
518 16427 : { }
519 :
520 16427 : void format(std::ostream& out, const char* fmtBegin,
521 : const char* fmtEnd, int ntrunc) const
522 : {
523 16427 : TINYFORMAT_ASSERT(m_value);
524 16427 : TINYFORMAT_ASSERT(m_formatImpl);
525 16427 : m_formatImpl(out, fmtBegin, fmtEnd, ntrunc, m_value);
526 16427 : }
527 :
528 0 : int toInt() const
529 : {
530 0 : TINYFORMAT_ASSERT(m_value);
531 0 : TINYFORMAT_ASSERT(m_toIntImpl);
532 0 : return m_toIntImpl(m_value);
533 : }
534 :
535 : private:
536 : template<typename T>
537 16427 : TINYFORMAT_HIDDEN static void formatImpl(std::ostream& out, const char* fmtBegin,
538 : const char* fmtEnd, int ntrunc, const void* value)
539 : {
540 16427 : formatValue(out, fmtBegin, fmtEnd, ntrunc, *static_cast<const T*>(value));
541 16427 : }
542 :
543 : template<typename T>
544 0 : TINYFORMAT_HIDDEN static int toIntImpl(const void* value)
545 : {
546 0 : return convertToInt<T>::invoke(*static_cast<const T*>(value));
547 : }
548 :
549 : const void* m_value{nullptr};
550 : void (*m_formatImpl)(std::ostream& out, const char* fmtBegin,
551 : const char* fmtEnd, int ntrunc, const void* value){nullptr};
552 : int (*m_toIntImpl)(const void* value){nullptr};
553 : };
554 :
555 :
556 : // Parse and return an integer from the string c, as atoi()
557 : // On return, c is set to one past the end of the integer.
558 6540 : inline int parseIntAndAdvance(const char*& c)
559 : {
560 6540 : int i = 0;
561 19620 : for (;*c >= '0' && *c <= '9'; ++c)
562 13080 : i = 10*i + (*c - '0');
563 6540 : return i;
564 : }
565 :
566 : // Parse width or precision `n` from format string pointer `c`, and advance it
567 : // to the next character. If an indirection is requested with `*`, the argument
568 : // is read from `args[argIndex]` and `argIndex` is incremented (or read
569 : // from `args[n]` in positional mode). Returns true if one or more
570 : // characters were read.
571 9887 : inline bool parseWidthOrPrecision(int& n, const char*& c, bool positionalMode,
572 : const detail::FormatArg* args,
573 : int& argIndex, int numArgs)
574 : {
575 9887 : if (*c >= '0' && *c <= '9') {
576 0 : n = parseIntAndAdvance(c);
577 0 : }
578 9887 : else if (*c == '*') {
579 0 : ++c;
580 0 : n = 0;
581 0 : if (positionalMode) {
582 0 : int pos = parseIntAndAdvance(c) - 1;
583 0 : if (*c != '$')
584 0 : TINYFORMAT_ERROR("tinyformat: Non-positional argument used after a positional one");
585 0 : if (pos >= 0 && pos < numArgs)
586 0 : n = args[pos].toInt();
587 : else
588 0 : TINYFORMAT_ERROR("tinyformat: Positional argument out of range");
589 0 : ++c;
590 0 : }
591 : else {
592 0 : if (argIndex < numArgs)
593 0 : n = args[argIndex++].toInt();
594 : else
595 0 : TINYFORMAT_ERROR("tinyformat: Not enough arguments to read variable width or precision");
596 : }
597 0 : }
598 : else {
599 9887 : return false;
600 : }
601 0 : return true;
602 9887 : }
603 :
604 : // Print literal part of format string and return next format spec position.
605 : //
606 : // Skips over any occurrences of '%%', printing a literal '%' to the output.
607 : // The position of the first % character of the next nontrivial format spec is
608 : // returned, or the end of string.
609 24395 : inline const char* printFormatStringLiteral(std::ostream& out, const char* fmt)
610 : {
611 24395 : const char* c = fmt;
612 107646 : for (;; ++c) {
613 107646 : if (*c == '\0') {
614 7968 : out.write(fmt, c - fmt);
615 7968 : return c;
616 : }
617 99678 : else if (*c == '%') {
618 16427 : out.write(fmt, c - fmt);
619 16427 : if (*(c+1) != '%')
620 16427 : return c;
621 : // for "%%", tack trailing % onto next literal section.
622 0 : fmt = ++c;
623 0 : }
624 83251 : }
625 24395 : }
626 :
627 :
628 : // Parse a format string and set the stream state accordingly.
629 : //
630 : // The format mini-language recognized here is meant to be the one from C99,
631 : // with the form "%[flags][width][.precision][length]type" with POSIX
632 : // positional arguments extension.
633 : //
634 : // POSIX positional arguments extension:
635 : // Conversions can be applied to the nth argument after the format in
636 : // the argument list, rather than to the next unused argument. In this case,
637 : // the conversion specifier character % (see below) is replaced by the sequence
638 : // "%n$", where n is a decimal integer in the range [1,{NL_ARGMAX}],
639 : // giving the position of the argument in the argument list. This feature
640 : // provides for the definition of format strings that select arguments
641 : // in an order appropriate to specific languages.
642 : //
643 : // The format can contain either numbered argument conversion specifications
644 : // (that is, "%n$" and "*m$"), or unnumbered argument conversion specifications
645 : // (that is, % and * ), but not both. The only exception to this is that %%
646 : // can be mixed with the "%n$" form. The results of mixing numbered and
647 : // unnumbered argument specifications in a format string are undefined.
648 : // When numbered argument specifications are used, specifying the Nth argument
649 : // requires that all the leading arguments, from the first to the (N-1)th,
650 : // are specified in the format string.
651 : //
652 : // In format strings containing the "%n$" form of conversion specification,
653 : // numbered arguments in the argument list can be referenced from the format
654 : // string as many times as required.
655 : //
656 : // Formatting options which can't be natively represented using the ostream
657 : // state are returned in spacePadPositive (for space padded positive numbers)
658 : // and ntrunc (for truncating conversions). argIndex is incremented if
659 : // necessary to pull out variable width and precision. The function returns a
660 : // pointer to the character after the end of the current format spec.
661 16427 : inline const char* streamStateFromFormat(std::ostream& out, bool& positionalMode,
662 : bool& spacePadPositive,
663 : int& ntrunc, const char* fmtStart,
664 : const detail::FormatArg* args,
665 : int& argIndex, int numArgs)
666 : {
667 16427 : TINYFORMAT_ASSERT(*fmtStart == '%');
668 : // Reset stream state to defaults.
669 16427 : out.width(0);
670 16427 : out.precision(6);
671 16427 : out.fill(' ');
672 : // Reset most flags; ignore irrelevant unitbuf & skipws.
673 32854 : out.unsetf(std::ios::adjustfield | std::ios::basefield |
674 16427 : std::ios::floatfield | std::ios::showbase | std::ios::boolalpha |
675 16427 : std::ios::showpoint | std::ios::showpos | std::ios::uppercase);
676 16427 : bool precisionSet = false;
677 16427 : bool widthSet = false;
678 16427 : int widthExtra = 0;
679 16427 : const char* c = fmtStart + 1;
680 :
681 : // 1) Parse an argument index (if followed by '$') or a width possibly
682 : // preceded with '0' flag.
683 16427 : if (*c >= '0' && *c <= '9') {
684 6540 : const char tmpc = *c;
685 6540 : int value = parseIntAndAdvance(c);
686 6540 : if (*c == '$') {
687 : // value is an argument index
688 0 : if (value > 0 && value <= numArgs)
689 0 : argIndex = value - 1;
690 : else
691 0 : TINYFORMAT_ERROR("tinyformat: Positional argument out of range");
692 0 : ++c;
693 0 : positionalMode = true;
694 0 : }
695 6540 : else if (positionalMode) {
696 0 : TINYFORMAT_ERROR("tinyformat: Non-positional argument used after a positional one");
697 : }
698 : else {
699 6540 : if (tmpc == '0') {
700 : // Use internal padding so that numeric values are
701 : // formatted correctly, eg -00010 rather than 000-10
702 6540 : out.fill('0');
703 6540 : out.setf(std::ios::internal, std::ios::adjustfield);
704 6540 : }
705 6540 : if (value != 0) {
706 : // Nonzero value means that we parsed width.
707 6540 : widthSet = true;
708 6540 : out.width(value);
709 6540 : }
710 : }
711 6540 : }
712 9887 : else if (positionalMode) {
713 0 : TINYFORMAT_ERROR("tinyformat: Non-positional argument used after a positional one");
714 : }
715 : // 2) Parse flags and width if we did not do it in previous step.
716 16427 : if (!widthSet) {
717 : // Parse flags
718 9887 : for (;; ++c) {
719 9887 : switch (*c) {
720 : case '#':
721 0 : out.setf(std::ios::showpoint | std::ios::showbase);
722 0 : continue;
723 : case '0':
724 : // overridden by left alignment ('-' flag)
725 0 : if (!(out.flags() & std::ios::left)) {
726 : // Use internal padding so that numeric values are
727 : // formatted correctly, eg -00010 rather than 000-10
728 0 : out.fill('0');
729 0 : out.setf(std::ios::internal, std::ios::adjustfield);
730 0 : }
731 0 : continue;
732 : case '-':
733 0 : out.fill(' ');
734 0 : out.setf(std::ios::left, std::ios::adjustfield);
735 0 : continue;
736 : case ' ':
737 : // overridden by show positive sign, '+' flag.
738 0 : if (!(out.flags() & std::ios::showpos))
739 0 : spacePadPositive = true;
740 0 : continue;
741 : case '+':
742 0 : out.setf(std::ios::showpos);
743 0 : spacePadPositive = false;
744 0 : widthExtra = 1;
745 0 : continue;
746 : default:
747 9887 : break;
748 : }
749 9887 : break;
750 : }
751 : // Parse width
752 9887 : int width = 0;
753 19774 : widthSet = parseWidthOrPrecision(width, c, positionalMode,
754 9887 : args, argIndex, numArgs);
755 9887 : if (widthSet) {
756 0 : if (width < 0) {
757 : // negative widths correspond to '-' flag set
758 0 : out.fill(' ');
759 0 : out.setf(std::ios::left, std::ios::adjustfield);
760 0 : width = -width;
761 0 : }
762 0 : out.width(width);
763 0 : }
764 9887 : }
765 : // 3) Parse precision
766 16427 : if (*c == '.') {
767 0 : ++c;
768 0 : int precision = 0;
769 0 : parseWidthOrPrecision(precision, c, positionalMode,
770 0 : args, argIndex, numArgs);
771 : // Presence of `.` indicates precision set, unless the inferred value
772 : // was negative in which case the default is used.
773 0 : precisionSet = precision >= 0;
774 0 : if (precisionSet)
775 0 : out.precision(precision);
776 0 : }
777 : // 4) Ignore any C99 length modifier
778 32854 : while (*c == 'l' || *c == 'h' || *c == 'L' ||
779 16427 : *c == 'j' || *c == 'z' || *c == 't') {
780 0 : ++c;
781 : }
782 : // 5) We're up to the conversion specifier character.
783 : // Set stream flags based on conversion specifier (thanks to the
784 : // boost::format class for forging the way here).
785 16427 : bool intConversion = false;
786 16427 : switch (*c) {
787 : case 'u': case 'd': case 'i':
788 14567 : out.setf(std::ios::dec, std::ios::basefield);
789 14567 : intConversion = true;
790 14567 : break;
791 : case 'o':
792 0 : out.setf(std::ios::oct, std::ios::basefield);
793 0 : intConversion = true;
794 0 : break;
795 : case 'X':
796 0 : out.setf(std::ios::uppercase);
797 : [[fallthrough]];
798 : case 'x': case 'p':
799 0 : out.setf(std::ios::hex, std::ios::basefield);
800 0 : intConversion = true;
801 0 : break;
802 : case 'E':
803 0 : out.setf(std::ios::uppercase);
804 : [[fallthrough]];
805 : case 'e':
806 0 : out.setf(std::ios::scientific, std::ios::floatfield);
807 0 : out.setf(std::ios::dec, std::ios::basefield);
808 0 : break;
809 : case 'F':
810 0 : out.setf(std::ios::uppercase);
811 : [[fallthrough]];
812 : case 'f':
813 0 : out.setf(std::ios::fixed, std::ios::floatfield);
814 0 : break;
815 : case 'A':
816 0 : out.setf(std::ios::uppercase);
817 : [[fallthrough]];
818 : case 'a':
819 : # ifdef _MSC_VER
820 : // Workaround https://developercommunity.visualstudio.com/content/problem/520472/hexfloat-stream-output-does-not-ignore-precision-a.html
821 : // by always setting maximum precision on MSVC to avoid precision
822 : // loss for doubles.
823 : out.precision(13);
824 : # endif
825 0 : out.setf(std::ios::fixed | std::ios::scientific, std::ios::floatfield);
826 0 : break;
827 : case 'G':
828 0 : out.setf(std::ios::uppercase);
829 : [[fallthrough]];
830 : case 'g':
831 0 : out.setf(std::ios::dec, std::ios::basefield);
832 : // As in boost::format, let stream decide float format.
833 0 : out.flags(out.flags() & ~std::ios::floatfield);
834 0 : break;
835 : case 'c':
836 : // Handled as special case inside formatValue()
837 0 : break;
838 : case 's':
839 1860 : if (precisionSet)
840 0 : ntrunc = static_cast<int>(out.precision());
841 : // Make %s print Booleans as "true" and "false"
842 1860 : out.setf(std::ios::boolalpha);
843 1860 : break;
844 : case 'n':
845 : // Not supported - will cause problems!
846 0 : TINYFORMAT_ERROR("tinyformat: %n conversion spec not supported");
847 : break;
848 : case '\0':
849 0 : TINYFORMAT_ERROR("tinyformat: Conversion spec incorrectly "
850 : "terminated by end of string");
851 : return c;
852 : default:
853 0 : break;
854 : }
855 16427 : if (intConversion && precisionSet && !widthSet) {
856 : // "precision" for integers gives the minimum number of digits (to be
857 : // padded with zeros on the left). This isn't really supported by the
858 : // iostreams, but we can approximately simulate it with the width if
859 : // the width isn't otherwise used.
860 0 : out.width(out.precision() + widthExtra);
861 0 : out.setf(std::ios::internal, std::ios::adjustfield);
862 0 : out.fill('0');
863 0 : }
864 16427 : return c+1;
865 0 : }
866 :
867 :
868 : //------------------------------------------------------------------------------
869 7968 : inline void formatImpl(std::ostream& out, const char* fmt,
870 : const detail::FormatArg* args,
871 : int numArgs)
872 : {
873 : // Saved stream state
874 7968 : std::streamsize origWidth = out.width();
875 7968 : std::streamsize origPrecision = out.precision();
876 7968 : std::ios::fmtflags origFlags = out.flags();
877 7968 : char origFill = out.fill();
878 :
879 : // "Positional mode" means all format specs should be of the form "%n$..."
880 : // with `n` an integer. We detect this in `streamStateFromFormat`.
881 7968 : bool positionalMode = false;
882 7968 : int argIndex = 0;
883 24395 : while (true) {
884 24395 : fmt = printFormatStringLiteral(out, fmt);
885 24395 : if (*fmt == '\0') {
886 7968 : if (!positionalMode && argIndex < numArgs) {
887 0 : TINYFORMAT_ERROR("tinyformat: Not enough conversion specifiers in format string");
888 : }
889 7968 : break;
890 : }
891 16427 : bool spacePadPositive = false;
892 16427 : int ntrunc = -1;
893 32854 : const char* fmtEnd = streamStateFromFormat(out, positionalMode, spacePadPositive, ntrunc, fmt,
894 16427 : args, argIndex, numArgs);
895 : // NB: argIndex may be incremented by reading variable width/precision
896 : // in `streamStateFromFormat`, so do the bounds check here.
897 16427 : if (argIndex >= numArgs) {
898 0 : TINYFORMAT_ERROR("tinyformat: Too many conversion specifiers in format string");
899 : return;
900 : }
901 16427 : const FormatArg& arg = args[argIndex];
902 : // Format the arg into the stream.
903 16427 : if (!spacePadPositive) {
904 16427 : arg.format(out, fmt, fmtEnd, ntrunc);
905 16427 : }
906 : else {
907 : // The following is a special case with no direct correspondence
908 : // between stream formatting and the printf() behaviour. Simulate
909 : // it crudely by formatting into a temporary string stream and
910 : // munging the resulting string.
911 0 : std::ostringstream tmpStream;
912 0 : tmpStream.copyfmt(out);
913 0 : tmpStream.setf(std::ios::showpos);
914 0 : arg.format(tmpStream, fmt, fmtEnd, ntrunc);
915 0 : std::string result = tmpStream.str(); // allocates... yuck.
916 0 : for (size_t i = 0, iend = result.size(); i < iend; ++i) {
917 0 : if (result[i] == '+')
918 0 : result[i] = ' ';
919 0 : }
920 0 : out << result;
921 0 : }
922 16427 : if (!positionalMode)
923 16427 : ++argIndex;
924 16427 : fmt = fmtEnd;
925 : }
926 :
927 : // Restore stream state
928 7968 : out.width(origWidth);
929 7968 : out.precision(origPrecision);
930 7968 : out.flags(origFlags);
931 7968 : out.fill(origFill);
932 7968 : }
933 :
934 : } // namespace detail
935 :
936 :
937 : /// List of template arguments format(), held in a type-opaque way.
938 : ///
939 : /// A const reference to FormatList (typedef'd as FormatListRef) may be
940 : /// conveniently used to pass arguments to non-template functions: All type
941 : /// information has been stripped from the arguments, leaving just enough of a
942 : /// common interface to perform formatting as required.
943 : class FormatList
944 : {
945 : public:
946 7968 : FormatList(detail::FormatArg* args, int N)
947 7968 : : m_args(args), m_N(N) { }
948 :
949 : friend void vformat(std::ostream& out, const char* fmt,
950 : const FormatList& list);
951 :
952 : private:
953 : const detail::FormatArg* m_args;
954 : int m_N;
955 : };
956 :
957 : /// Reference to type-opaque format list for passing to vformat()
958 : typedef const FormatList& FormatListRef;
959 :
960 :
961 : namespace detail {
962 :
963 : // Format list subclass with fixed storage to avoid dynamic allocation
964 : template<int N>
965 : class FormatListN : public FormatList
966 : {
967 : public:
968 : #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES
969 : template<typename... Args>
970 7968 : explicit FormatListN(const Args&... args)
971 7968 : : FormatList(&m_formatterStore[0], N),
972 7968 : m_formatterStore { FormatArg(args)... }
973 7968 : { static_assert(sizeof...(args) == N, "Number of args must be N"); }
974 : #else // C++98 version
975 : void init(int) {}
976 : # define TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR(n) \
977 : \
978 : template<TINYFORMAT_ARGTYPES(n)> \
979 : FormatListN(TINYFORMAT_VARARGS(n)) \
980 : : FormatList(&m_formatterStore[0], n) \
981 : { TINYFORMAT_ASSERT(n == N); init(0, TINYFORMAT_PASSARGS(n)); } \
982 : \
983 : template<TINYFORMAT_ARGTYPES(n)> \
984 : void init(int i, TINYFORMAT_VARARGS(n)) \
985 : { \
986 : m_formatterStore[i] = FormatArg(v1); \
987 : init(i+1 TINYFORMAT_PASSARGS_TAIL(n)); \
988 : }
989 :
990 : TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR)
991 : # undef TINYFORMAT_MAKE_FORMATLIST_CONSTRUCTOR
992 : #endif
993 : FormatListN(const FormatListN& other)
994 : : FormatList(&m_formatterStore[0], N)
995 : { std::copy(&other.m_formatterStore[0], &other.m_formatterStore[N],
996 : &m_formatterStore[0]); }
997 :
998 : private:
999 : FormatArg m_formatterStore[N];
1000 : };
1001 :
1002 : // Special 0-arg version - MSVC says zero-sized C array in struct is nonstandard
1003 : template<> class FormatListN<0> : public FormatList
1004 : {
1005 : public:
1006 0 : FormatListN() : FormatList(nullptr, 0) {}
1007 : };
1008 :
1009 : } // namespace detail
1010 :
1011 :
1012 : //------------------------------------------------------------------------------
1013 : // Primary API functions
1014 :
1015 : #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES
1016 :
1017 : /// Make type-agnostic format list from list of template arguments.
1018 : ///
1019 : /// The exact return type of this function is an implementation detail and
1020 : /// shouldn't be relied upon. Instead it should be stored as a FormatListRef:
1021 : ///
1022 : /// FormatListRef formatList = makeFormatList( /*...*/ );
1023 : template<typename... Args>
1024 7968 : detail::FormatListN<sizeof...(Args)> makeFormatList(const Args&... args)
1025 : {
1026 7968 : return detail::FormatListN<sizeof...(args)>(args...);
1027 : }
1028 :
1029 : #else // C++98 version
1030 :
1031 : inline detail::FormatListN<0> makeFormatList()
1032 : {
1033 : return detail::FormatListN<0>();
1034 : }
1035 : #define TINYFORMAT_MAKE_MAKEFORMATLIST(n) \
1036 : template<TINYFORMAT_ARGTYPES(n)> \
1037 : detail::FormatListN<n> makeFormatList(TINYFORMAT_VARARGS(n)) \
1038 : { \
1039 : return detail::FormatListN<n>(TINYFORMAT_PASSARGS(n)); \
1040 : }
1041 : TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_MAKEFORMATLIST)
1042 : #undef TINYFORMAT_MAKE_MAKEFORMATLIST
1043 :
1044 : #endif
1045 :
1046 : /// Format list of arguments to the stream according to the given format string.
1047 : ///
1048 : /// The name vformat() is chosen for the semantic similarity to vprintf(): the
1049 : /// list of format arguments is held in a single function argument.
1050 7968 : inline void vformat(std::ostream& out, const char* fmt, FormatListRef list)
1051 : {
1052 7968 : detail::formatImpl(out, fmt, list.m_args, list.m_N);
1053 7968 : }
1054 :
1055 :
1056 : #ifdef TINYFORMAT_USE_VARIADIC_TEMPLATES
1057 :
1058 : /// Format list of arguments to the stream according to given format string.
1059 : template<typename... Args>
1060 7968 : void format(std::ostream& out, const char* fmt, const Args&... args)
1061 : {
1062 7968 : vformat(out, fmt, makeFormatList(args...));
1063 7968 : }
1064 :
1065 : /// Format list of arguments according to the given format string and return
1066 : /// the result as a string.
1067 : template<typename... Args>
1068 7967 : std::string format(const char* fmt, const Args&... args)
1069 : {
1070 7967 : std::ostringstream oss;
1071 7967 : format(oss, fmt, args...);
1072 7967 : return oss.str();
1073 7967 : }
1074 :
1075 : /// Format list of arguments to std::cout, according to the given format string
1076 : template<typename... Args>
1077 : void printf(const char* fmt, const Args&... args)
1078 : {
1079 : format(std::cout, fmt, args...);
1080 : }
1081 :
1082 : template<typename... Args>
1083 : void printfln(const char* fmt, const Args&... args)
1084 : {
1085 : format(std::cout, fmt, args...);
1086 : std::cout << '\n';
1087 : }
1088 :
1089 :
1090 : #else // C++98 version
1091 :
1092 : inline void format(std::ostream& out, const char* fmt)
1093 : {
1094 : vformat(out, fmt, makeFormatList());
1095 : }
1096 :
1097 : inline std::string format(const char* fmt)
1098 : {
1099 : std::ostringstream oss;
1100 : format(oss, fmt);
1101 : return oss.str();
1102 : }
1103 :
1104 : inline void printf(const char* fmt)
1105 : {
1106 : format(std::cout, fmt);
1107 : }
1108 :
1109 : inline void printfln(const char* fmt)
1110 : {
1111 : format(std::cout, fmt);
1112 : std::cout << '\n';
1113 : }
1114 :
1115 : #define TINYFORMAT_MAKE_FORMAT_FUNCS(n) \
1116 : \
1117 : template<TINYFORMAT_ARGTYPES(n)> \
1118 : void format(std::ostream& out, const char* fmt, TINYFORMAT_VARARGS(n)) \
1119 : { \
1120 : vformat(out, fmt, makeFormatList(TINYFORMAT_PASSARGS(n))); \
1121 : } \
1122 : \
1123 : template<TINYFORMAT_ARGTYPES(n)> \
1124 : std::string format(const char* fmt, TINYFORMAT_VARARGS(n)) \
1125 : { \
1126 : std::ostringstream oss; \
1127 : format(oss, fmt, TINYFORMAT_PASSARGS(n)); \
1128 : return oss.str(); \
1129 : } \
1130 : \
1131 : template<TINYFORMAT_ARGTYPES(n)> \
1132 : void printf(const char* fmt, TINYFORMAT_VARARGS(n)) \
1133 : { \
1134 : format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \
1135 : } \
1136 : \
1137 : template<TINYFORMAT_ARGTYPES(n)> \
1138 : void printfln(const char* fmt, TINYFORMAT_VARARGS(n)) \
1139 : { \
1140 : format(std::cout, fmt, TINYFORMAT_PASSARGS(n)); \
1141 : std::cout << '\n'; \
1142 : }
1143 :
1144 : TINYFORMAT_FOREACH_ARGNUM(TINYFORMAT_MAKE_FORMAT_FUNCS)
1145 : #undef TINYFORMAT_MAKE_FORMAT_FUNCS
1146 :
1147 : #endif
1148 :
1149 : // Added for Bitcoin Core
1150 : template<typename... Args>
1151 1 : std::string format(const std::string &fmt, const Args&... args)
1152 : {
1153 1 : std::ostringstream oss;
1154 1 : format(oss, fmt.c_str(), args...);
1155 1 : return oss.str();
1156 1 : }
1157 :
1158 : } // namespace tinyformat
1159 :
1160 : // Added for Bitcoin Core:
1161 : /** Format arguments and return the string or write to given std::ostream (see tinyformat::format doc for details) */
1162 : #define strprintf tfm::format
1163 :
1164 : #endif // TINYFORMAT_H_INCLUDED
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