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11fdf7f2 TL |
1 | /* |
2 | Formatting library for C++ | |
3 | ||
4 | Copyright (c) 2012 - present, Victor Zverovich | |
5 | All rights reserved. | |
6 | ||
7 | Redistribution and use in source and binary forms, with or without | |
8 | modification, are permitted provided that the following conditions are met: | |
9 | ||
10 | 1. Redistributions of source code must retain the above copyright notice, this | |
11 | list of conditions and the following disclaimer. | |
12 | 2. Redistributions in binary form must reproduce the above copyright notice, | |
13 | this list of conditions and the following disclaimer in the documentation | |
14 | and/or other materials provided with the distribution. | |
15 | ||
16 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
17 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
18 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
19 | DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR | |
20 | ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
21 | (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
22 | LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
23 | ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
24 | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
25 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
28 | #ifndef FMT_FORMAT_H_ | |
29 | #define FMT_FORMAT_H_ | |
30 | ||
31 | #include <algorithm> | |
32 | #include <cassert> | |
33 | #include <cmath> | |
34 | #include <cstring> | |
35 | #include <limits> | |
36 | #include <memory> | |
37 | #include <stdexcept> | |
38 | #include <stdint.h> | |
39 | ||
40 | #ifdef __clang__ | |
41 | # define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__) | |
42 | #else | |
43 | # define FMT_CLANG_VERSION 0 | |
44 | #endif | |
45 | ||
46 | #ifdef __INTEL_COMPILER | |
47 | # define FMT_ICC_VERSION __INTEL_COMPILER | |
48 | #elif defined(__ICL) | |
49 | # define FMT_ICC_VERSION __ICL | |
50 | #else | |
51 | # define FMT_ICC_VERSION 0 | |
52 | #endif | |
53 | ||
54 | #ifdef __NVCC__ | |
55 | # define FMT_CUDA_VERSION (__CUDACC_VER_MAJOR__ * 100 + __CUDACC_VER_MINOR__) | |
56 | #else | |
57 | # define FMT_CUDA_VERSION 0 | |
58 | #endif | |
59 | ||
60 | #include "core.h" | |
61 | ||
62 | #if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION | |
63 | # pragma GCC diagnostic push | |
64 | ||
65 | // Disable the warning about declaration shadowing because it affects too | |
66 | // many valid cases. | |
67 | # pragma GCC diagnostic ignored "-Wshadow" | |
68 | ||
69 | // Disable the warning about implicit conversions that may change the sign of | |
70 | // an integer; silencing it otherwise would require many explicit casts. | |
71 | # pragma GCC diagnostic ignored "-Wsign-conversion" | |
eafe8130 TL |
72 | |
73 | // Disable the warning about nonliteral format strings because we construct | |
74 | // them dynamically when falling back to snprintf for FP formatting. | |
75 | # pragma GCC diagnostic ignored "-Wformat-nonliteral" | |
11fdf7f2 TL |
76 | #endif |
77 | ||
78 | # if FMT_CLANG_VERSION | |
79 | # pragma GCC diagnostic ignored "-Wgnu-string-literal-operator-template" | |
80 | # endif | |
81 | ||
82 | #ifdef _SECURE_SCL | |
83 | # define FMT_SECURE_SCL _SECURE_SCL | |
84 | #else | |
85 | # define FMT_SECURE_SCL 0 | |
86 | #endif | |
87 | ||
88 | #if FMT_SECURE_SCL | |
89 | # include <iterator> | |
90 | #endif | |
91 | ||
92 | #ifdef __has_builtin | |
93 | # define FMT_HAS_BUILTIN(x) __has_builtin(x) | |
94 | #else | |
95 | # define FMT_HAS_BUILTIN(x) 0 | |
96 | #endif | |
97 | ||
98 | #ifdef __GNUC_LIBSTD__ | |
99 | # define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__) | |
100 | #endif | |
101 | ||
102 | #ifndef FMT_THROW | |
103 | # if FMT_EXCEPTIONS | |
104 | # if FMT_MSC_VER | |
105 | FMT_BEGIN_NAMESPACE | |
106 | namespace internal { | |
107 | template <typename Exception> | |
108 | inline void do_throw(const Exception &x) { | |
109 | // Silence unreachable code warnings in MSVC because these are nearly | |
110 | // impossible to fix in a generic code. | |
111 | volatile bool b = true; | |
112 | if (b) | |
113 | throw x; | |
114 | } | |
115 | } | |
116 | FMT_END_NAMESPACE | |
117 | # define FMT_THROW(x) fmt::internal::do_throw(x) | |
118 | # else | |
119 | # define FMT_THROW(x) throw x | |
120 | # endif | |
121 | # else | |
122 | # define FMT_THROW(x) do { static_cast<void>(sizeof(x)); assert(false); } while(false); | |
123 | # endif | |
124 | #endif | |
125 | ||
126 | #ifndef FMT_USE_USER_DEFINED_LITERALS | |
127 | // For Intel's compiler and NVIDIA's compiler both it and the system gcc/msc | |
128 | // must support UDLs. | |
129 | # if (FMT_HAS_FEATURE(cxx_user_literals) || \ | |
130 | FMT_GCC_VERSION >= 407 || FMT_MSC_VER >= 1900) && \ | |
131 | (!(FMT_ICC_VERSION || FMT_CUDA_VERSION) || \ | |
132 | FMT_ICC_VERSION >= 1500 || FMT_CUDA_VERSION >= 700) | |
133 | # define FMT_USE_USER_DEFINED_LITERALS 1 | |
134 | # else | |
135 | # define FMT_USE_USER_DEFINED_LITERALS 0 | |
136 | # endif | |
137 | #endif | |
138 | ||
139 | // EDG C++ Front End based compilers (icc, nvcc) do not currently support UDL | |
140 | // templates. | |
141 | #if FMT_USE_USER_DEFINED_LITERALS && \ | |
142 | FMT_ICC_VERSION == 0 && \ | |
143 | FMT_CUDA_VERSION == 0 && \ | |
144 | ((FMT_GCC_VERSION >= 600 && __cplusplus >= 201402L) || \ | |
145 | (defined(FMT_CLANG_VERSION) && FMT_CLANG_VERSION >= 304)) | |
146 | # define FMT_UDL_TEMPLATE 1 | |
147 | #else | |
148 | # define FMT_UDL_TEMPLATE 0 | |
149 | #endif | |
150 | ||
151 | #ifndef FMT_USE_EXTERN_TEMPLATES | |
152 | # ifndef FMT_HEADER_ONLY | |
153 | # define FMT_USE_EXTERN_TEMPLATES \ | |
154 | ((FMT_CLANG_VERSION >= 209 && __cplusplus >= 201103L) || \ | |
155 | (FMT_GCC_VERSION >= 303 && FMT_HAS_GXX_CXX11)) | |
156 | # else | |
157 | # define FMT_USE_EXTERN_TEMPLATES 0 | |
158 | # endif | |
159 | #endif | |
160 | ||
161 | #if FMT_HAS_GXX_CXX11 || FMT_HAS_FEATURE(cxx_trailing_return) || \ | |
162 | FMT_MSC_VER >= 1600 | |
163 | # define FMT_USE_TRAILING_RETURN 1 | |
164 | #else | |
165 | # define FMT_USE_TRAILING_RETURN 0 | |
166 | #endif | |
167 | ||
168 | #ifndef FMT_USE_GRISU | |
169 | # define FMT_USE_GRISU 0 | |
eafe8130 | 170 | //# define FMT_USE_GRISU std::numeric_limits<double>::is_iec559 |
11fdf7f2 TL |
171 | #endif |
172 | ||
173 | // __builtin_clz is broken in clang with Microsoft CodeGen: | |
174 | // https://github.com/fmtlib/fmt/issues/519 | |
175 | #ifndef _MSC_VER | |
176 | # if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz) | |
177 | # define FMT_BUILTIN_CLZ(n) __builtin_clz(n) | |
178 | # endif | |
179 | ||
180 | # if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll) | |
181 | # define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n) | |
182 | # endif | |
183 | #endif | |
184 | ||
11fdf7f2 TL |
185 | // Some compilers masquerade as both MSVC and GCC-likes or otherwise support |
186 | // __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the | |
187 | // MSVC intrinsics if the clz and clzll builtins are not available. | |
188 | #if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(_MANAGED) | |
189 | # include <intrin.h> // _BitScanReverse, _BitScanReverse64 | |
190 | ||
191 | FMT_BEGIN_NAMESPACE | |
192 | namespace internal { | |
193 | // Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning. | |
194 | # ifndef __clang__ | |
195 | # pragma intrinsic(_BitScanReverse) | |
196 | # endif | |
197 | inline uint32_t clz(uint32_t x) { | |
198 | unsigned long r = 0; | |
199 | _BitScanReverse(&r, x); | |
200 | ||
201 | assert(x != 0); | |
202 | // Static analysis complains about using uninitialized data | |
203 | // "r", but the only way that can happen is if "x" is 0, | |
204 | // which the callers guarantee to not happen. | |
205 | # pragma warning(suppress: 6102) | |
206 | return 31 - r; | |
207 | } | |
208 | # define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n) | |
209 | ||
210 | # if defined(_WIN64) && !defined(__clang__) | |
211 | # pragma intrinsic(_BitScanReverse64) | |
212 | # endif | |
213 | ||
214 | inline uint32_t clzll(uint64_t x) { | |
215 | unsigned long r = 0; | |
216 | # ifdef _WIN64 | |
217 | _BitScanReverse64(&r, x); | |
218 | # else | |
219 | // Scan the high 32 bits. | |
220 | if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32))) | |
221 | return 63 - (r + 32); | |
222 | ||
223 | // Scan the low 32 bits. | |
224 | _BitScanReverse(&r, static_cast<uint32_t>(x)); | |
225 | # endif | |
226 | ||
227 | assert(x != 0); | |
228 | // Static analysis complains about using uninitialized data | |
229 | // "r", but the only way that can happen is if "x" is 0, | |
230 | // which the callers guarantee to not happen. | |
231 | # pragma warning(suppress: 6102) | |
232 | return 63 - r; | |
233 | } | |
234 | # define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n) | |
235 | } | |
236 | FMT_END_NAMESPACE | |
237 | #endif | |
238 | ||
239 | FMT_BEGIN_NAMESPACE | |
240 | namespace internal { | |
241 | ||
242 | // An equivalent of `*reinterpret_cast<Dest*>(&source)` that doesn't produce | |
243 | // undefined behavior (e.g. due to type aliasing). | |
244 | // Example: uint64_t d = bit_cast<uint64_t>(2.718); | |
245 | template <typename Dest, typename Source> | |
246 | inline Dest bit_cast(const Source& source) { | |
247 | static_assert(sizeof(Dest) == sizeof(Source), "size mismatch"); | |
248 | Dest dest; | |
249 | std::memcpy(&dest, &source, sizeof(dest)); | |
250 | return dest; | |
251 | } | |
252 | ||
253 | // An implementation of begin and end for pre-C++11 compilers such as gcc 4. | |
254 | template <typename C> | |
255 | FMT_CONSTEXPR auto begin(const C &c) -> decltype(c.begin()) { | |
256 | return c.begin(); | |
257 | } | |
258 | template <typename T, std::size_t N> | |
259 | FMT_CONSTEXPR T *begin(T (&array)[N]) FMT_NOEXCEPT { return array; } | |
260 | template <typename C> | |
261 | FMT_CONSTEXPR auto end(const C &c) -> decltype(c.end()) { return c.end(); } | |
262 | template <typename T, std::size_t N> | |
263 | FMT_CONSTEXPR T *end(T (&array)[N]) FMT_NOEXCEPT { return array + N; } | |
264 | ||
265 | // For std::result_of in gcc 4.4. | |
266 | template <typename Result> | |
267 | struct function { | |
268 | template <typename T> | |
269 | struct result { typedef Result type; }; | |
270 | }; | |
271 | ||
272 | struct dummy_int { | |
273 | int data[2]; | |
274 | operator int() const { return 0; } | |
275 | }; | |
276 | typedef std::numeric_limits<internal::dummy_int> fputil; | |
277 | ||
eafe8130 TL |
278 | // Dummy implementations of system functions called if the latter are not |
279 | // available. | |
11fdf7f2 TL |
280 | inline dummy_int isinf(...) { return dummy_int(); } |
281 | inline dummy_int _finite(...) { return dummy_int(); } | |
282 | inline dummy_int isnan(...) { return dummy_int(); } | |
283 | inline dummy_int _isnan(...) { return dummy_int(); } | |
284 | ||
11fdf7f2 TL |
285 | template <typename Allocator> |
286 | typename Allocator::value_type *allocate(Allocator& alloc, std::size_t n) { | |
287 | #if __cplusplus >= 201103L || FMT_MSC_VER >= 1700 | |
288 | return std::allocator_traits<Allocator>::allocate(alloc, n); | |
289 | #else | |
290 | return alloc.allocate(n); | |
291 | #endif | |
292 | } | |
293 | ||
294 | // A helper function to suppress bogus "conditional expression is constant" | |
295 | // warnings. | |
296 | template <typename T> | |
297 | inline T const_check(T value) { return value; } | |
298 | } // namespace internal | |
299 | FMT_END_NAMESPACE | |
300 | ||
301 | namespace std { | |
302 | // Standard permits specialization of std::numeric_limits. This specialization | |
303 | // is used to resolve ambiguity between isinf and std::isinf in glibc: | |
304 | // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891 | |
eafe8130 | 305 | // and the same for isnan. |
11fdf7f2 TL |
306 | template <> |
307 | class numeric_limits<fmt::internal::dummy_int> : | |
308 | public std::numeric_limits<int> { | |
309 | public: | |
310 | // Portable version of isinf. | |
311 | template <typename T> | |
312 | static bool isinfinity(T x) { | |
313 | using namespace fmt::internal; | |
314 | // The resolution "priority" is: | |
315 | // isinf macro > std::isinf > ::isinf > fmt::internal::isinf | |
eafe8130 | 316 | if (const_check(sizeof(isinf(x)) != sizeof(fmt::internal::dummy_int))) |
11fdf7f2 TL |
317 | return isinf(x) != 0; |
318 | return !_finite(static_cast<double>(x)); | |
319 | } | |
320 | ||
321 | // Portable version of isnan. | |
322 | template <typename T> | |
323 | static bool isnotanumber(T x) { | |
324 | using namespace fmt::internal; | |
325 | if (const_check(sizeof(isnan(x)) != sizeof(fmt::internal::dummy_int))) | |
326 | return isnan(x) != 0; | |
327 | return _isnan(static_cast<double>(x)) != 0; | |
328 | } | |
11fdf7f2 TL |
329 | }; |
330 | } // namespace std | |
331 | ||
332 | FMT_BEGIN_NAMESPACE | |
333 | template <typename Range> | |
334 | class basic_writer; | |
335 | ||
336 | template <typename OutputIt, typename T = typename OutputIt::value_type> | |
337 | class output_range { | |
338 | private: | |
339 | OutputIt it_; | |
340 | ||
341 | // Unused yet. | |
342 | typedef void sentinel; | |
343 | sentinel end() const; | |
344 | ||
345 | public: | |
346 | typedef OutputIt iterator; | |
347 | typedef T value_type; | |
348 | ||
349 | explicit output_range(OutputIt it): it_(it) {} | |
350 | OutputIt begin() const { return it_; } | |
351 | }; | |
352 | ||
353 | // A range where begin() returns back_insert_iterator. | |
354 | template <typename Container> | |
355 | class back_insert_range: | |
356 | public output_range<std::back_insert_iterator<Container>> { | |
357 | typedef output_range<std::back_insert_iterator<Container>> base; | |
358 | public: | |
359 | typedef typename Container::value_type value_type; | |
360 | ||
361 | back_insert_range(Container &c): base(std::back_inserter(c)) {} | |
362 | back_insert_range(typename base::iterator it): base(it) {} | |
363 | }; | |
364 | ||
365 | typedef basic_writer<back_insert_range<internal::buffer>> writer; | |
366 | typedef basic_writer<back_insert_range<internal::wbuffer>> wwriter; | |
367 | ||
368 | /** A formatting error such as invalid format string. */ | |
369 | class format_error : public std::runtime_error { | |
370 | public: | |
371 | explicit format_error(const char *message) | |
372 | : std::runtime_error(message) {} | |
373 | ||
374 | explicit format_error(const std::string &message) | |
375 | : std::runtime_error(message) {} | |
376 | }; | |
377 | ||
378 | namespace internal { | |
379 | ||
380 | #if FMT_SECURE_SCL | |
381 | template <typename T> | |
382 | struct checked { typedef stdext::checked_array_iterator<T*> type; }; | |
383 | ||
384 | // Make a checked iterator to avoid warnings on MSVC. | |
385 | template <typename T> | |
386 | inline stdext::checked_array_iterator<T*> make_checked(T *p, std::size_t size) { | |
387 | return {p, size}; | |
388 | } | |
389 | #else | |
390 | template <typename T> | |
391 | struct checked { typedef T *type; }; | |
392 | template <typename T> | |
393 | inline T *make_checked(T *p, std::size_t) { return p; } | |
394 | #endif | |
395 | ||
396 | template <typename T> | |
397 | template <typename U> | |
398 | void basic_buffer<T>::append(const U *begin, const U *end) { | |
399 | std::size_t new_size = size_ + internal::to_unsigned(end - begin); | |
400 | reserve(new_size); | |
401 | std::uninitialized_copy(begin, end, | |
402 | internal::make_checked(ptr_, capacity_) + size_); | |
403 | size_ = new_size; | |
404 | } | |
405 | } // namespace internal | |
406 | ||
eafe8130 TL |
407 | // C++20 feature test, since r346892 Clang considers char8_t a fundamental |
408 | // type in this mode. If this is the case __cpp_char8_t will be defined. | |
409 | #if !defined(__cpp_char8_t) | |
11fdf7f2 | 410 | // A UTF-8 code unit type. |
eafe8130 TL |
411 | enum char8_t: unsigned char {}; |
412 | #endif | |
11fdf7f2 TL |
413 | |
414 | // A UTF-8 string view. | |
415 | class u8string_view : public basic_string_view<char8_t> { | |
11fdf7f2 | 416 | public: |
eafe8130 | 417 | typedef char8_t char_type; |
11fdf7f2 | 418 | |
eafe8130 TL |
419 | u8string_view(const char *s): |
420 | basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s)) {} | |
421 | u8string_view(const char *s, size_t count) FMT_NOEXCEPT: | |
422 | basic_string_view<char8_t>(reinterpret_cast<const char8_t*>(s), count) {} | |
11fdf7f2 TL |
423 | }; |
424 | ||
425 | #if FMT_USE_USER_DEFINED_LITERALS | |
426 | inline namespace literals { | |
427 | inline u8string_view operator"" _u(const char *s, std::size_t n) { | |
eafe8130 | 428 | return {s, n}; |
11fdf7f2 TL |
429 | } |
430 | } | |
431 | #endif | |
432 | ||
11fdf7f2 TL |
433 | // The number of characters to store in the basic_memory_buffer object itself |
434 | // to avoid dynamic memory allocation. | |
435 | enum { inline_buffer_size = 500 }; | |
436 | ||
437 | /** | |
438 | \rst | |
439 | A dynamically growing memory buffer for trivially copyable/constructible types | |
440 | with the first ``SIZE`` elements stored in the object itself. | |
441 | ||
442 | You can use one of the following typedefs for common character types: | |
443 | ||
444 | +----------------+------------------------------+ | |
445 | | Type | Definition | | |
446 | +================+==============================+ | |
447 | | memory_buffer | basic_memory_buffer<char> | | |
448 | +----------------+------------------------------+ | |
449 | | wmemory_buffer | basic_memory_buffer<wchar_t> | | |
450 | +----------------+------------------------------+ | |
451 | ||
452 | **Example**:: | |
453 | ||
454 | fmt::memory_buffer out; | |
455 | format_to(out, "The answer is {}.", 42); | |
456 | ||
eafe8130 | 457 | This will append the following output to the ``out`` object: |
11fdf7f2 TL |
458 | |
459 | .. code-block:: none | |
460 | ||
461 | The answer is 42. | |
462 | ||
463 | The output can be converted to an ``std::string`` with ``to_string(out)``. | |
464 | \endrst | |
465 | */ | |
466 | template <typename T, std::size_t SIZE = inline_buffer_size, | |
467 | typename Allocator = std::allocator<T> > | |
468 | class basic_memory_buffer: private Allocator, public internal::basic_buffer<T> { | |
469 | private: | |
470 | T store_[SIZE]; | |
471 | ||
472 | // Deallocate memory allocated by the buffer. | |
473 | void deallocate() { | |
474 | T* data = this->data(); | |
475 | if (data != store_) Allocator::deallocate(data, this->capacity()); | |
476 | } | |
477 | ||
478 | protected: | |
479 | void grow(std::size_t size) FMT_OVERRIDE; | |
480 | ||
481 | public: | |
482 | explicit basic_memory_buffer(const Allocator &alloc = Allocator()) | |
483 | : Allocator(alloc) { | |
484 | this->set(store_, SIZE); | |
485 | } | |
486 | ~basic_memory_buffer() { deallocate(); } | |
487 | ||
488 | private: | |
489 | // Move data from other to this buffer. | |
490 | void move(basic_memory_buffer &other) { | |
491 | Allocator &this_alloc = *this, &other_alloc = other; | |
492 | this_alloc = std::move(other_alloc); | |
493 | T* data = other.data(); | |
494 | std::size_t size = other.size(), capacity = other.capacity(); | |
495 | if (data == other.store_) { | |
496 | this->set(store_, capacity); | |
497 | std::uninitialized_copy(other.store_, other.store_ + size, | |
498 | internal::make_checked(store_, capacity)); | |
499 | } else { | |
500 | this->set(data, capacity); | |
501 | // Set pointer to the inline array so that delete is not called | |
502 | // when deallocating. | |
503 | other.set(other.store_, 0); | |
504 | } | |
505 | this->resize(size); | |
506 | } | |
507 | ||
508 | public: | |
509 | /** | |
510 | \rst | |
511 | Constructs a :class:`fmt::basic_memory_buffer` object moving the content | |
512 | of the other object to it. | |
513 | \endrst | |
514 | */ | |
515 | basic_memory_buffer(basic_memory_buffer &&other) { | |
516 | move(other); | |
517 | } | |
518 | ||
519 | /** | |
520 | \rst | |
521 | Moves the content of the other ``basic_memory_buffer`` object to this one. | |
522 | \endrst | |
523 | */ | |
524 | basic_memory_buffer &operator=(basic_memory_buffer &&other) { | |
525 | assert(this != &other); | |
526 | deallocate(); | |
527 | move(other); | |
528 | return *this; | |
529 | } | |
530 | ||
531 | // Returns a copy of the allocator associated with this buffer. | |
532 | Allocator get_allocator() const { return *this; } | |
533 | }; | |
534 | ||
535 | template <typename T, std::size_t SIZE, typename Allocator> | |
536 | void basic_memory_buffer<T, SIZE, Allocator>::grow(std::size_t size) { | |
537 | std::size_t old_capacity = this->capacity(); | |
538 | std::size_t new_capacity = old_capacity + old_capacity / 2; | |
539 | if (size > new_capacity) | |
540 | new_capacity = size; | |
541 | T *old_data = this->data(); | |
542 | T *new_data = internal::allocate<Allocator>(*this, new_capacity); | |
543 | // The following code doesn't throw, so the raw pointer above doesn't leak. | |
544 | std::uninitialized_copy(old_data, old_data + this->size(), | |
545 | internal::make_checked(new_data, new_capacity)); | |
546 | this->set(new_data, new_capacity); | |
547 | // deallocate must not throw according to the standard, but even if it does, | |
548 | // the buffer already uses the new storage and will deallocate it in | |
549 | // destructor. | |
550 | if (old_data != store_) | |
551 | Allocator::deallocate(old_data, old_capacity); | |
552 | } | |
553 | ||
554 | typedef basic_memory_buffer<char> memory_buffer; | |
555 | typedef basic_memory_buffer<wchar_t> wmemory_buffer; | |
556 | ||
11fdf7f2 TL |
557 | namespace internal { |
558 | ||
559 | template <typename Char> | |
560 | struct char_traits; | |
561 | ||
562 | template <> | |
563 | struct char_traits<char> { | |
564 | // Formats a floating-point number. | |
565 | template <typename T> | |
566 | FMT_API static int format_float(char *buffer, std::size_t size, | |
567 | const char *format, int precision, T value); | |
568 | }; | |
569 | ||
570 | template <> | |
571 | struct char_traits<wchar_t> { | |
572 | template <typename T> | |
573 | FMT_API static int format_float(wchar_t *buffer, std::size_t size, | |
574 | const wchar_t *format, int precision, T value); | |
575 | }; | |
576 | ||
577 | #if FMT_USE_EXTERN_TEMPLATES | |
578 | extern template int char_traits<char>::format_float<double>( | |
579 | char *buffer, std::size_t size, const char* format, int precision, | |
580 | double value); | |
581 | extern template int char_traits<char>::format_float<long double>( | |
582 | char *buffer, std::size_t size, const char* format, int precision, | |
583 | long double value); | |
584 | ||
585 | extern template int char_traits<wchar_t>::format_float<double>( | |
586 | wchar_t *buffer, std::size_t size, const wchar_t* format, int precision, | |
587 | double value); | |
588 | extern template int char_traits<wchar_t>::format_float<long double>( | |
589 | wchar_t *buffer, std::size_t size, const wchar_t* format, int precision, | |
590 | long double value); | |
591 | #endif | |
592 | ||
593 | template <typename Container> | |
594 | inline typename std::enable_if< | |
595 | is_contiguous<Container>::value, | |
596 | typename checked<typename Container::value_type>::type>::type | |
597 | reserve(std::back_insert_iterator<Container> &it, std::size_t n) { | |
598 | Container &c = internal::get_container(it); | |
599 | std::size_t size = c.size(); | |
600 | c.resize(size + n); | |
601 | return make_checked(&c[size], n); | |
602 | } | |
603 | ||
604 | template <typename Iterator> | |
605 | inline Iterator &reserve(Iterator &it, std::size_t) { return it; } | |
606 | ||
607 | template <typename Char> | |
608 | class null_terminating_iterator; | |
609 | ||
610 | template <typename Char> | |
611 | FMT_CONSTEXPR_DECL const Char *pointer_from(null_terminating_iterator<Char> it); | |
612 | ||
613 | // An iterator that produces a null terminator on *end. This simplifies parsing | |
614 | // and allows comparing the performance of processing a null-terminated string | |
615 | // vs string_view. | |
616 | template <typename Char> | |
617 | class null_terminating_iterator { | |
618 | public: | |
619 | typedef std::ptrdiff_t difference_type; | |
620 | typedef Char value_type; | |
621 | typedef const Char* pointer; | |
622 | typedef const Char& reference; | |
623 | typedef std::random_access_iterator_tag iterator_category; | |
624 | ||
625 | null_terminating_iterator() : ptr_(0), end_(0) {} | |
626 | ||
627 | FMT_CONSTEXPR null_terminating_iterator(const Char *ptr, const Char *end) | |
628 | : ptr_(ptr), end_(end) {} | |
629 | ||
630 | template <typename Range> | |
631 | FMT_CONSTEXPR explicit null_terminating_iterator(const Range &r) | |
632 | : ptr_(r.begin()), end_(r.end()) {} | |
633 | ||
634 | FMT_CONSTEXPR null_terminating_iterator &operator=(const Char *ptr) { | |
635 | assert(ptr <= end_); | |
636 | ptr_ = ptr; | |
637 | return *this; | |
638 | } | |
639 | ||
640 | FMT_CONSTEXPR Char operator*() const { | |
eafe8130 | 641 | return ptr_ != end_ ? *ptr_ : Char(); |
11fdf7f2 TL |
642 | } |
643 | ||
644 | FMT_CONSTEXPR null_terminating_iterator operator++() { | |
645 | ++ptr_; | |
646 | return *this; | |
647 | } | |
648 | ||
649 | FMT_CONSTEXPR null_terminating_iterator operator++(int) { | |
650 | null_terminating_iterator result(*this); | |
651 | ++ptr_; | |
652 | return result; | |
653 | } | |
654 | ||
655 | FMT_CONSTEXPR null_terminating_iterator operator--() { | |
656 | --ptr_; | |
657 | return *this; | |
658 | } | |
659 | ||
660 | FMT_CONSTEXPR null_terminating_iterator operator+(difference_type n) { | |
661 | return null_terminating_iterator(ptr_ + n, end_); | |
662 | } | |
663 | ||
664 | FMT_CONSTEXPR null_terminating_iterator operator-(difference_type n) { | |
665 | return null_terminating_iterator(ptr_ - n, end_); | |
666 | } | |
667 | ||
668 | FMT_CONSTEXPR null_terminating_iterator operator+=(difference_type n) { | |
669 | ptr_ += n; | |
670 | return *this; | |
671 | } | |
672 | ||
673 | FMT_CONSTEXPR difference_type operator-( | |
674 | null_terminating_iterator other) const { | |
675 | return ptr_ - other.ptr_; | |
676 | } | |
677 | ||
678 | FMT_CONSTEXPR bool operator!=(null_terminating_iterator other) const { | |
679 | return ptr_ != other.ptr_; | |
680 | } | |
681 | ||
682 | bool operator>=(null_terminating_iterator other) const { | |
683 | return ptr_ >= other.ptr_; | |
684 | } | |
685 | ||
686 | // This should be a friend specialization pointer_from<Char> but the latter | |
687 | // doesn't compile by gcc 5.1 due to a compiler bug. | |
688 | template <typename CharT> | |
689 | friend FMT_CONSTEXPR_DECL const CharT *pointer_from( | |
690 | null_terminating_iterator<CharT> it); | |
691 | ||
692 | private: | |
693 | const Char *ptr_; | |
694 | const Char *end_; | |
695 | }; | |
696 | ||
697 | template <typename T> | |
698 | FMT_CONSTEXPR const T *pointer_from(const T *p) { return p; } | |
699 | ||
700 | template <typename Char> | |
701 | FMT_CONSTEXPR const Char *pointer_from(null_terminating_iterator<Char> it) { | |
702 | return it.ptr_; | |
703 | } | |
704 | ||
705 | // An output iterator that counts the number of objects written to it and | |
706 | // discards them. | |
707 | template <typename T> | |
708 | class counting_iterator { | |
709 | private: | |
710 | std::size_t count_; | |
711 | mutable T blackhole_; | |
712 | ||
713 | public: | |
714 | typedef std::output_iterator_tag iterator_category; | |
715 | typedef T value_type; | |
716 | typedef std::ptrdiff_t difference_type; | |
717 | typedef T* pointer; | |
718 | typedef T& reference; | |
719 | typedef counting_iterator _Unchecked_type; // Mark iterator as checked. | |
720 | ||
721 | counting_iterator(): count_(0) {} | |
722 | ||
723 | std::size_t count() const { return count_; } | |
724 | ||
725 | counting_iterator& operator++() { | |
726 | ++count_; | |
727 | return *this; | |
728 | } | |
729 | ||
730 | counting_iterator operator++(int) { | |
731 | auto it = *this; | |
732 | ++*this; | |
733 | return it; | |
734 | } | |
735 | ||
736 | T &operator*() const { return blackhole_; } | |
737 | }; | |
738 | ||
eafe8130 TL |
739 | template <typename OutputIt> |
740 | class truncating_iterator_base { | |
741 | protected: | |
742 | OutputIt out_; | |
743 | std::size_t limit_; | |
744 | std::size_t count_; | |
745 | ||
746 | truncating_iterator_base(OutputIt out, std::size_t limit) | |
747 | : out_(out), limit_(limit), count_(0) {} | |
748 | ||
749 | public: | |
750 | typedef std::output_iterator_tag iterator_category; | |
751 | typedef void difference_type; | |
752 | typedef void pointer; | |
753 | typedef void reference; | |
754 | typedef truncating_iterator_base _Unchecked_type; // Mark iterator as checked. | |
755 | ||
756 | OutputIt base() const { return out_; } | |
757 | std::size_t count() const { return count_; } | |
758 | }; | |
759 | ||
11fdf7f2 TL |
760 | // An output iterator that truncates the output and counts the number of objects |
761 | // written to it. | |
eafe8130 TL |
762 | template <typename OutputIt, typename Enable = typename std::is_void< |
763 | typename std::iterator_traits<OutputIt>::value_type>::type> | |
764 | class truncating_iterator; | |
765 | ||
11fdf7f2 | 766 | template <typename OutputIt> |
eafe8130 TL |
767 | class truncating_iterator<OutputIt, std::false_type>: |
768 | public truncating_iterator_base<OutputIt> { | |
11fdf7f2 TL |
769 | typedef std::iterator_traits<OutputIt> traits; |
770 | ||
11fdf7f2 TL |
771 | mutable typename traits::value_type blackhole_; |
772 | ||
773 | public: | |
11fdf7f2 | 774 | typedef typename traits::value_type value_type; |
11fdf7f2 TL |
775 | |
776 | truncating_iterator(OutputIt out, std::size_t limit) | |
eafe8130 | 777 | : truncating_iterator_base<OutputIt>(out, limit) {} |
11fdf7f2 TL |
778 | |
779 | truncating_iterator& operator++() { | |
eafe8130 TL |
780 | if (this->count_++ < this->limit_) |
781 | ++this->out_; | |
11fdf7f2 TL |
782 | return *this; |
783 | } | |
784 | ||
785 | truncating_iterator operator++(int) { | |
786 | auto it = *this; | |
787 | ++*this; | |
788 | return it; | |
789 | } | |
790 | ||
eafe8130 TL |
791 | value_type& operator*() const { |
792 | return this->count_ < this->limit_ ? *this->out_ : blackhole_; | |
793 | } | |
794 | }; | |
795 | ||
796 | template <typename OutputIt> | |
797 | class truncating_iterator<OutputIt, std::true_type>: | |
798 | public truncating_iterator_base<OutputIt> { | |
799 | public: | |
800 | typedef typename OutputIt::container_type::value_type value_type; | |
801 | ||
802 | truncating_iterator(OutputIt out, std::size_t limit) | |
803 | : truncating_iterator_base<OutputIt>(out, limit) {} | |
804 | ||
805 | truncating_iterator& operator=(value_type val) { | |
806 | if (this->count_++ < this->limit_) | |
807 | this->out_ = val; | |
808 | return *this; | |
809 | } | |
810 | ||
811 | truncating_iterator& operator++() { return *this; } | |
812 | truncating_iterator& operator++(int) { return *this; } | |
813 | truncating_iterator& operator*() { return *this; } | |
11fdf7f2 TL |
814 | }; |
815 | ||
816 | // Returns true if value is negative, false otherwise. | |
817 | // Same as (value < 0) but doesn't produce warnings if T is an unsigned type. | |
818 | template <typename T> | |
819 | FMT_CONSTEXPR typename std::enable_if< | |
820 | std::numeric_limits<T>::is_signed, bool>::type is_negative(T value) { | |
821 | return value < 0; | |
822 | } | |
823 | template <typename T> | |
824 | FMT_CONSTEXPR typename std::enable_if< | |
825 | !std::numeric_limits<T>::is_signed, bool>::type is_negative(T) { | |
826 | return false; | |
827 | } | |
828 | ||
829 | template <typename T> | |
830 | struct int_traits { | |
831 | // Smallest of uint32_t and uint64_t that is large enough to represent | |
832 | // all values of T. | |
833 | typedef typename std::conditional< | |
834 | std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>::type main_type; | |
835 | }; | |
836 | ||
837 | // Static data is placed in this class template to allow header-only | |
838 | // configuration. | |
839 | template <typename T = void> | |
840 | struct FMT_API basic_data { | |
841 | static const uint32_t POWERS_OF_10_32[]; | |
842 | static const uint32_t ZERO_OR_POWERS_OF_10_32[]; | |
843 | static const uint64_t ZERO_OR_POWERS_OF_10_64[]; | |
844 | static const uint64_t POW10_SIGNIFICANDS[]; | |
845 | static const int16_t POW10_EXPONENTS[]; | |
846 | static const char DIGITS[]; | |
eafe8130 TL |
847 | static const char FOREGROUND_COLOR[]; |
848 | static const char BACKGROUND_COLOR[]; | |
11fdf7f2 TL |
849 | static const char RESET_COLOR[]; |
850 | static const wchar_t WRESET_COLOR[]; | |
851 | }; | |
852 | ||
853 | #if FMT_USE_EXTERN_TEMPLATES | |
854 | extern template struct basic_data<void>; | |
855 | #endif | |
856 | ||
857 | typedef basic_data<> data; | |
858 | ||
859 | #ifdef FMT_BUILTIN_CLZLL | |
860 | // Returns the number of decimal digits in n. Leading zeros are not counted | |
861 | // except for n == 0 in which case count_digits returns 1. | |
862 | inline unsigned count_digits(uint64_t n) { | |
863 | // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10 | |
864 | // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits. | |
865 | int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12; | |
866 | return to_unsigned(t) - (n < data::ZERO_OR_POWERS_OF_10_64[t]) + 1; | |
867 | } | |
868 | #else | |
869 | // Fallback version of count_digits used when __builtin_clz is not available. | |
870 | inline unsigned count_digits(uint64_t n) { | |
871 | unsigned count = 1; | |
872 | for (;;) { | |
873 | // Integer division is slow so do it for a group of four digits instead | |
874 | // of for every digit. The idea comes from the talk by Alexandrescu | |
875 | // "Three Optimization Tips for C++". See speed-test for a comparison. | |
876 | if (n < 10) return count; | |
877 | if (n < 100) return count + 1; | |
878 | if (n < 1000) return count + 2; | |
879 | if (n < 10000) return count + 3; | |
880 | n /= 10000u; | |
881 | count += 4; | |
882 | } | |
883 | } | |
884 | #endif | |
885 | ||
eafe8130 TL |
886 | template <typename Char> |
887 | inline size_t count_code_points(basic_string_view<Char> s) { return s.size(); } | |
888 | ||
11fdf7f2 | 889 | // Counts the number of code points in a UTF-8 string. |
eafe8130 TL |
890 | FMT_API size_t count_code_points(basic_string_view<char8_t> s); |
891 | ||
892 | inline char8_t to_char8_t(char c) { return static_cast<char8_t>(c); } | |
893 | ||
894 | template <typename InputIt, typename OutChar> | |
895 | struct needs_conversion: std::integral_constant<bool, | |
896 | std::is_same< | |
897 | typename std::iterator_traits<InputIt>::value_type, char>::value && | |
898 | std::is_same<OutChar, char8_t>::value> {}; | |
899 | ||
900 | template <typename OutChar, typename InputIt, typename OutputIt> | |
901 | typename std::enable_if< | |
902 | !needs_conversion<InputIt, OutChar>::value, OutputIt>::type | |
903 | copy_str(InputIt begin, InputIt end, OutputIt it) { | |
904 | return std::copy(begin, end, it); | |
905 | } | |
906 | ||
907 | template <typename OutChar, typename InputIt, typename OutputIt> | |
908 | typename std::enable_if< | |
909 | needs_conversion<InputIt, OutChar>::value, OutputIt>::type | |
910 | copy_str(InputIt begin, InputIt end, OutputIt it) { | |
911 | return std::transform(begin, end, it, to_char8_t); | |
912 | } | |
11fdf7f2 TL |
913 | |
914 | #if FMT_HAS_CPP_ATTRIBUTE(always_inline) | |
915 | # define FMT_ALWAYS_INLINE __attribute__((always_inline)) | |
916 | #else | |
917 | # define FMT_ALWAYS_INLINE | |
918 | #endif | |
919 | ||
920 | template <typename Handler> | |
921 | inline char *lg(uint32_t n, Handler h) FMT_ALWAYS_INLINE; | |
922 | ||
923 | // Computes g = floor(log10(n)) and calls h.on<g>(n); | |
924 | template <typename Handler> | |
925 | inline char *lg(uint32_t n, Handler h) { | |
926 | return n < 100 ? n < 10 ? h.template on<0>(n) : h.template on<1>(n) | |
927 | : n < 1000000 | |
928 | ? n < 10000 ? n < 1000 ? h.template on<2>(n) | |
929 | : h.template on<3>(n) | |
930 | : n < 100000 ? h.template on<4>(n) | |
931 | : h.template on<5>(n) | |
932 | : n < 100000000 ? n < 10000000 ? h.template on<6>(n) | |
933 | : h.template on<7>(n) | |
934 | : n < 1000000000 ? h.template on<8>(n) | |
935 | : h.template on<9>(n); | |
936 | } | |
937 | ||
938 | // An lg handler that formats a decimal number. | |
939 | // Usage: lg(n, decimal_formatter(buffer)); | |
940 | class decimal_formatter { | |
941 | private: | |
942 | char *buffer_; | |
943 | ||
944 | void write_pair(unsigned N, uint32_t index) { | |
945 | std::memcpy(buffer_ + N, data::DIGITS + index * 2, 2); | |
946 | } | |
947 | ||
948 | public: | |
949 | explicit decimal_formatter(char *buf) : buffer_(buf) {} | |
950 | ||
951 | template <unsigned N> char *on(uint32_t u) { | |
952 | if (N == 0) { | |
953 | *buffer_ = static_cast<char>(u) + '0'; | |
954 | } else if (N == 1) { | |
955 | write_pair(0, u); | |
956 | } else { | |
957 | // The idea of using 4.32 fixed-point numbers is based on | |
958 | // https://github.com/jeaiii/itoa | |
959 | unsigned n = N - 1; | |
960 | unsigned a = n / 5 * n * 53 / 16; | |
961 | uint64_t t = ((1ULL << (32 + a)) / | |
962 | data::ZERO_OR_POWERS_OF_10_32[n] + 1 - n / 9); | |
963 | t = ((t * u) >> a) + n / 5 * 4; | |
964 | write_pair(0, t >> 32); | |
965 | for (unsigned i = 2; i < N; i += 2) { | |
966 | t = 100ULL * static_cast<uint32_t>(t); | |
967 | write_pair(i, t >> 32); | |
968 | } | |
969 | if (N % 2 == 0) { | |
970 | buffer_[N] = static_cast<char>( | |
971 | (10ULL * static_cast<uint32_t>(t)) >> 32) + '0'; | |
972 | } | |
973 | } | |
974 | return buffer_ += N + 1; | |
975 | } | |
976 | }; | |
977 | ||
978 | // An lg handler that formats a decimal number with a terminating null. | |
979 | class decimal_formatter_null : public decimal_formatter { | |
980 | public: | |
981 | explicit decimal_formatter_null(char *buf) : decimal_formatter(buf) {} | |
982 | ||
983 | template <unsigned N> char *on(uint32_t u) { | |
984 | char *buf = decimal_formatter::on<N>(u); | |
985 | *buf = '\0'; | |
986 | return buf; | |
987 | } | |
988 | }; | |
989 | ||
990 | #ifdef FMT_BUILTIN_CLZ | |
991 | // Optional version of count_digits for better performance on 32-bit platforms. | |
992 | inline unsigned count_digits(uint32_t n) { | |
993 | int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12; | |
994 | return to_unsigned(t) - (n < data::ZERO_OR_POWERS_OF_10_32[t]) + 1; | |
995 | } | |
996 | #endif | |
997 | ||
998 | // A functor that doesn't add a thousands separator. | |
999 | struct no_thousands_sep { | |
1000 | typedef char char_type; | |
1001 | ||
1002 | template <typename Char> | |
1003 | void operator()(Char *) {} | |
eafe8130 TL |
1004 | |
1005 | enum { size = 0 }; | |
11fdf7f2 TL |
1006 | }; |
1007 | ||
1008 | // A functor that adds a thousands separator. | |
1009 | template <typename Char> | |
1010 | class add_thousands_sep { | |
1011 | private: | |
1012 | basic_string_view<Char> sep_; | |
1013 | ||
1014 | // Index of a decimal digit with the least significant digit having index 0. | |
1015 | unsigned digit_index_; | |
1016 | ||
1017 | public: | |
1018 | typedef Char char_type; | |
1019 | ||
1020 | explicit add_thousands_sep(basic_string_view<Char> sep) | |
1021 | : sep_(sep), digit_index_(0) {} | |
1022 | ||
1023 | void operator()(Char *&buffer) { | |
1024 | if (++digit_index_ % 3 != 0) | |
1025 | return; | |
1026 | buffer -= sep_.size(); | |
1027 | std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(), | |
1028 | internal::make_checked(buffer, sep_.size())); | |
1029 | } | |
eafe8130 TL |
1030 | |
1031 | enum { size = 1 }; | |
11fdf7f2 TL |
1032 | }; |
1033 | ||
1034 | template <typename Char> | |
eafe8130 TL |
1035 | FMT_API Char thousands_sep_impl(locale_ref loc); |
1036 | ||
1037 | template <typename Char> | |
1038 | inline Char thousands_sep(locale_ref loc) { | |
1039 | return Char(thousands_sep_impl<char>(loc)); | |
1040 | } | |
1041 | ||
1042 | template <> | |
1043 | inline wchar_t thousands_sep(locale_ref loc) { | |
1044 | return thousands_sep_impl<wchar_t>(loc); | |
1045 | } | |
11fdf7f2 TL |
1046 | |
1047 | // Formats a decimal unsigned integer value writing into buffer. | |
1048 | // thousands_sep is a functor that is called after writing each char to | |
1049 | // add a thousands separator if necessary. | |
1050 | template <typename UInt, typename Char, typename ThousandsSep> | |
1051 | inline Char *format_decimal(Char *buffer, UInt value, unsigned num_digits, | |
1052 | ThousandsSep thousands_sep) { | |
1053 | buffer += num_digits; | |
1054 | Char *end = buffer; | |
1055 | while (value >= 100) { | |
1056 | // Integer division is slow so do it for a group of two digits instead | |
1057 | // of for every digit. The idea comes from the talk by Alexandrescu | |
1058 | // "Three Optimization Tips for C++". See speed-test for a comparison. | |
1059 | unsigned index = static_cast<unsigned>((value % 100) * 2); | |
1060 | value /= 100; | |
eafe8130 | 1061 | *--buffer = static_cast<Char>(data::DIGITS[index + 1]); |
11fdf7f2 | 1062 | thousands_sep(buffer); |
eafe8130 | 1063 | *--buffer = static_cast<Char>(data::DIGITS[index]); |
11fdf7f2 TL |
1064 | thousands_sep(buffer); |
1065 | } | |
1066 | if (value < 10) { | |
eafe8130 | 1067 | *--buffer = static_cast<Char>('0' + value); |
11fdf7f2 TL |
1068 | return end; |
1069 | } | |
1070 | unsigned index = static_cast<unsigned>(value * 2); | |
eafe8130 | 1071 | *--buffer = static_cast<Char>(data::DIGITS[index + 1]); |
11fdf7f2 | 1072 | thousands_sep(buffer); |
eafe8130 | 1073 | *--buffer = static_cast<Char>(data::DIGITS[index]); |
11fdf7f2 TL |
1074 | return end; |
1075 | } | |
1076 | ||
eafe8130 TL |
1077 | template <typename OutChar, typename UInt, typename Iterator, |
1078 | typename ThousandsSep> | |
11fdf7f2 TL |
1079 | inline Iterator format_decimal( |
1080 | Iterator out, UInt value, unsigned num_digits, ThousandsSep sep) { | |
1081 | typedef typename ThousandsSep::char_type char_type; | |
eafe8130 TL |
1082 | // Buffer should be large enough to hold all digits (<= digits10 + 1). |
1083 | enum { max_size = std::numeric_limits<UInt>::digits10 + 1 }; | |
1084 | FMT_ASSERT(ThousandsSep::size <= 1, "invalid separator"); | |
1085 | char_type buffer[max_size + max_size / 3]; | |
1086 | auto end = format_decimal(buffer, value, num_digits, sep); | |
1087 | return internal::copy_str<OutChar>(buffer, end, out); | |
11fdf7f2 TL |
1088 | } |
1089 | ||
eafe8130 | 1090 | template <typename OutChar, typename It, typename UInt> |
11fdf7f2 | 1091 | inline It format_decimal(It out, UInt value, unsigned num_digits) { |
eafe8130 | 1092 | return format_decimal<OutChar>(out, value, num_digits, no_thousands_sep()); |
11fdf7f2 TL |
1093 | } |
1094 | ||
1095 | template <unsigned BASE_BITS, typename Char, typename UInt> | |
1096 | inline Char *format_uint(Char *buffer, UInt value, unsigned num_digits, | |
1097 | bool upper = false) { | |
1098 | buffer += num_digits; | |
1099 | Char *end = buffer; | |
1100 | do { | |
1101 | const char *digits = upper ? "0123456789ABCDEF" : "0123456789abcdef"; | |
1102 | unsigned digit = (value & ((1 << BASE_BITS) - 1)); | |
eafe8130 | 1103 | *--buffer = static_cast<Char>(BASE_BITS < 4 ? '0' + digit : digits[digit]); |
11fdf7f2 TL |
1104 | } while ((value >>= BASE_BITS) != 0); |
1105 | return end; | |
1106 | } | |
1107 | ||
eafe8130 | 1108 | template <unsigned BASE_BITS, typename Char, typename It, typename UInt> |
11fdf7f2 TL |
1109 | inline It format_uint(It out, UInt value, unsigned num_digits, |
1110 | bool upper = false) { | |
1111 | // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1) | |
1112 | // and null. | |
1113 | char buffer[std::numeric_limits<UInt>::digits / BASE_BITS + 2]; | |
1114 | format_uint<BASE_BITS>(buffer, value, num_digits, upper); | |
eafe8130 | 1115 | return internal::copy_str<Char>(buffer, buffer + num_digits, out); |
11fdf7f2 TL |
1116 | } |
1117 | ||
1118 | #ifndef _WIN32 | |
1119 | # define FMT_USE_WINDOWS_H 0 | |
1120 | #elif !defined(FMT_USE_WINDOWS_H) | |
1121 | # define FMT_USE_WINDOWS_H 1 | |
1122 | #endif | |
1123 | ||
1124 | // Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h. | |
1125 | // All the functionality that relies on it will be disabled too. | |
1126 | #if FMT_USE_WINDOWS_H | |
1127 | // A converter from UTF-8 to UTF-16. | |
1128 | // It is only provided for Windows since other systems support UTF-8 natively. | |
1129 | class utf8_to_utf16 { | |
1130 | private: | |
1131 | wmemory_buffer buffer_; | |
1132 | ||
1133 | public: | |
1134 | FMT_API explicit utf8_to_utf16(string_view s); | |
1135 | operator wstring_view() const { return wstring_view(&buffer_[0], size()); } | |
1136 | size_t size() const { return buffer_.size() - 1; } | |
1137 | const wchar_t *c_str() const { return &buffer_[0]; } | |
1138 | std::wstring str() const { return std::wstring(&buffer_[0], size()); } | |
1139 | }; | |
1140 | ||
1141 | // A converter from UTF-16 to UTF-8. | |
1142 | // It is only provided for Windows since other systems support UTF-8 natively. | |
1143 | class utf16_to_utf8 { | |
1144 | private: | |
1145 | memory_buffer buffer_; | |
1146 | ||
1147 | public: | |
1148 | utf16_to_utf8() {} | |
1149 | FMT_API explicit utf16_to_utf8(wstring_view s); | |
1150 | operator string_view() const { return string_view(&buffer_[0], size()); } | |
1151 | size_t size() const { return buffer_.size() - 1; } | |
1152 | const char *c_str() const { return &buffer_[0]; } | |
1153 | std::string str() const { return std::string(&buffer_[0], size()); } | |
1154 | ||
1155 | // Performs conversion returning a system error code instead of | |
1156 | // throwing exception on conversion error. This method may still throw | |
1157 | // in case of memory allocation error. | |
1158 | FMT_API int convert(wstring_view s); | |
1159 | }; | |
1160 | ||
1161 | FMT_API void format_windows_error(fmt::internal::buffer &out, int error_code, | |
1162 | fmt::string_view message) FMT_NOEXCEPT; | |
1163 | #endif | |
1164 | ||
1165 | template <typename T = void> | |
1166 | struct null {}; | |
1167 | } // namespace internal | |
1168 | ||
1169 | enum alignment { | |
1170 | ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC | |
1171 | }; | |
1172 | ||
1173 | // Flags. | |
eafe8130 | 1174 | enum { SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8 }; |
11fdf7f2 TL |
1175 | |
1176 | // An alignment specifier. | |
eafe8130 | 1177 | struct align_spec { |
11fdf7f2 TL |
1178 | unsigned width_; |
1179 | // Fill is always wchar_t and cast to char if necessary to avoid having | |
1180 | // two specialization of AlignSpec and its subclasses. | |
1181 | wchar_t fill_; | |
1182 | alignment align_; | |
1183 | ||
eafe8130 | 1184 | FMT_CONSTEXPR align_spec() : width_(0), fill_(' '), align_(ALIGN_DEFAULT) {} |
11fdf7f2 TL |
1185 | FMT_CONSTEXPR unsigned width() const { return width_; } |
1186 | FMT_CONSTEXPR wchar_t fill() const { return fill_; } | |
1187 | FMT_CONSTEXPR alignment align() const { return align_; } | |
eafe8130 TL |
1188 | }; |
1189 | ||
1190 | struct core_format_specs { | |
1191 | int precision; | |
1192 | uint_least8_t flags; | |
1193 | char type; | |
11fdf7f2 | 1194 | |
eafe8130 TL |
1195 | FMT_CONSTEXPR core_format_specs() : precision(-1), flags(0), type(0) {} |
1196 | FMT_CONSTEXPR bool has(unsigned f) const { return (flags & f) != 0; } | |
11fdf7f2 TL |
1197 | }; |
1198 | ||
1199 | // Format specifiers. | |
1200 | template <typename Char> | |
eafe8130 TL |
1201 | struct basic_format_specs : align_spec, core_format_specs { |
1202 | FMT_CONSTEXPR basic_format_specs() {} | |
11fdf7f2 TL |
1203 | }; |
1204 | ||
1205 | typedef basic_format_specs<char> format_specs; | |
1206 | ||
1207 | template <typename Char, typename ErrorHandler> | |
1208 | FMT_CONSTEXPR unsigned basic_parse_context<Char, ErrorHandler>::next_arg_id() { | |
1209 | if (next_arg_id_ >= 0) | |
1210 | return internal::to_unsigned(next_arg_id_++); | |
1211 | on_error("cannot switch from manual to automatic argument indexing"); | |
1212 | return 0; | |
1213 | } | |
1214 | ||
1215 | namespace internal { | |
1216 | ||
eafe8130 TL |
1217 | // Formats value using Grisu2 algorithm: |
1218 | // https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf | |
1219 | template <typename Double> | |
1220 | FMT_API typename std::enable_if<sizeof(Double) == sizeof(uint64_t), bool>::type | |
1221 | grisu2_format(Double value, buffer &buf, core_format_specs); | |
1222 | template <typename Double> | |
1223 | inline typename std::enable_if<sizeof(Double) != sizeof(uint64_t), bool>::type | |
1224 | grisu2_format(Double, buffer &, core_format_specs) { return false; } | |
11fdf7f2 | 1225 | |
eafe8130 TL |
1226 | template <typename Double> |
1227 | void sprintf_format(Double, internal::buffer &, core_format_specs); | |
1228 | ||
1229 | template <typename Handler> | |
1230 | FMT_CONSTEXPR void handle_int_type_spec(char spec, Handler &&handler) { | |
11fdf7f2 TL |
1231 | switch (spec) { |
1232 | case 0: case 'd': | |
1233 | handler.on_dec(); | |
1234 | break; | |
1235 | case 'x': case 'X': | |
1236 | handler.on_hex(); | |
1237 | break; | |
1238 | case 'b': case 'B': | |
1239 | handler.on_bin(); | |
1240 | break; | |
1241 | case 'o': | |
1242 | handler.on_oct(); | |
1243 | break; | |
1244 | case 'n': | |
1245 | handler.on_num(); | |
1246 | break; | |
1247 | default: | |
1248 | handler.on_error(); | |
1249 | } | |
1250 | } | |
1251 | ||
eafe8130 TL |
1252 | template <typename Handler> |
1253 | FMT_CONSTEXPR void handle_float_type_spec(char spec, Handler &&handler) { | |
11fdf7f2 TL |
1254 | switch (spec) { |
1255 | case 0: case 'g': case 'G': | |
1256 | handler.on_general(); | |
1257 | break; | |
1258 | case 'e': case 'E': | |
1259 | handler.on_exp(); | |
1260 | break; | |
1261 | case 'f': case 'F': | |
1262 | handler.on_fixed(); | |
1263 | break; | |
1264 | case 'a': case 'A': | |
1265 | handler.on_hex(); | |
1266 | break; | |
1267 | default: | |
1268 | handler.on_error(); | |
1269 | break; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | template <typename Char, typename Handler> | |
1274 | FMT_CONSTEXPR void handle_char_specs( | |
1275 | const basic_format_specs<Char> *specs, Handler &&handler) { | |
1276 | if (!specs) return handler.on_char(); | |
eafe8130 TL |
1277 | if (specs->type && specs->type != 'c') return handler.on_int(); |
1278 | if (specs->align() == ALIGN_NUMERIC || specs->flags != 0) | |
11fdf7f2 TL |
1279 | handler.on_error("invalid format specifier for char"); |
1280 | handler.on_char(); | |
1281 | } | |
1282 | ||
1283 | template <typename Char, typename Handler> | |
1284 | FMT_CONSTEXPR void handle_cstring_type_spec(Char spec, Handler &&handler) { | |
1285 | if (spec == 0 || spec == 's') | |
1286 | handler.on_string(); | |
1287 | else if (spec == 'p') | |
1288 | handler.on_pointer(); | |
1289 | else | |
1290 | handler.on_error("invalid type specifier"); | |
1291 | } | |
1292 | ||
1293 | template <typename Char, typename ErrorHandler> | |
1294 | FMT_CONSTEXPR void check_string_type_spec(Char spec, ErrorHandler &&eh) { | |
1295 | if (spec != 0 && spec != 's') | |
1296 | eh.on_error("invalid type specifier"); | |
1297 | } | |
1298 | ||
1299 | template <typename Char, typename ErrorHandler> | |
1300 | FMT_CONSTEXPR void check_pointer_type_spec(Char spec, ErrorHandler &&eh) { | |
1301 | if (spec != 0 && spec != 'p') | |
1302 | eh.on_error("invalid type specifier"); | |
1303 | } | |
1304 | ||
1305 | template <typename ErrorHandler> | |
1306 | class int_type_checker : private ErrorHandler { | |
1307 | public: | |
1308 | FMT_CONSTEXPR explicit int_type_checker(ErrorHandler eh) : ErrorHandler(eh) {} | |
1309 | ||
1310 | FMT_CONSTEXPR void on_dec() {} | |
1311 | FMT_CONSTEXPR void on_hex() {} | |
1312 | FMT_CONSTEXPR void on_bin() {} | |
1313 | FMT_CONSTEXPR void on_oct() {} | |
1314 | FMT_CONSTEXPR void on_num() {} | |
1315 | ||
1316 | FMT_CONSTEXPR void on_error() { | |
1317 | ErrorHandler::on_error("invalid type specifier"); | |
1318 | } | |
1319 | }; | |
1320 | ||
1321 | template <typename ErrorHandler> | |
1322 | class float_type_checker : private ErrorHandler { | |
1323 | public: | |
1324 | FMT_CONSTEXPR explicit float_type_checker(ErrorHandler eh) | |
1325 | : ErrorHandler(eh) {} | |
1326 | ||
1327 | FMT_CONSTEXPR void on_general() {} | |
1328 | FMT_CONSTEXPR void on_exp() {} | |
1329 | FMT_CONSTEXPR void on_fixed() {} | |
1330 | FMT_CONSTEXPR void on_hex() {} | |
1331 | ||
1332 | FMT_CONSTEXPR void on_error() { | |
1333 | ErrorHandler::on_error("invalid type specifier"); | |
1334 | } | |
1335 | }; | |
1336 | ||
eafe8130 | 1337 | template <typename ErrorHandler> |
11fdf7f2 TL |
1338 | class char_specs_checker : public ErrorHandler { |
1339 | private: | |
eafe8130 | 1340 | char type_; |
11fdf7f2 TL |
1341 | |
1342 | public: | |
eafe8130 | 1343 | FMT_CONSTEXPR char_specs_checker(char type, ErrorHandler eh) |
11fdf7f2 TL |
1344 | : ErrorHandler(eh), type_(type) {} |
1345 | ||
1346 | FMT_CONSTEXPR void on_int() { | |
1347 | handle_int_type_spec(type_, int_type_checker<ErrorHandler>(*this)); | |
1348 | } | |
1349 | FMT_CONSTEXPR void on_char() {} | |
1350 | }; | |
1351 | ||
1352 | template <typename ErrorHandler> | |
1353 | class cstring_type_checker : public ErrorHandler { | |
1354 | public: | |
1355 | FMT_CONSTEXPR explicit cstring_type_checker(ErrorHandler eh) | |
1356 | : ErrorHandler(eh) {} | |
1357 | ||
1358 | FMT_CONSTEXPR void on_string() {} | |
1359 | FMT_CONSTEXPR void on_pointer() {} | |
1360 | }; | |
1361 | ||
1362 | template <typename Context> | |
1363 | void arg_map<Context>::init(const basic_format_args<Context> &args) { | |
1364 | if (map_) | |
1365 | return; | |
1366 | map_ = new entry[args.max_size()]; | |
eafe8130 | 1367 | if (args.is_packed()) { |
11fdf7f2 TL |
1368 | for (unsigned i = 0;/*nothing*/; ++i) { |
1369 | internal::type arg_type = args.type(i); | |
1370 | switch (arg_type) { | |
1371 | case internal::none_type: | |
1372 | return; | |
1373 | case internal::named_arg_type: | |
1374 | push_back(args.values_[i]); | |
1375 | break; | |
1376 | default: | |
1377 | break; // Do nothing. | |
1378 | } | |
1379 | } | |
1380 | } | |
1381 | for (unsigned i = 0; ; ++i) { | |
1382 | switch (args.args_[i].type_) { | |
1383 | case internal::none_type: | |
1384 | return; | |
1385 | case internal::named_arg_type: | |
1386 | push_back(args.args_[i].value_); | |
1387 | break; | |
1388 | default: | |
1389 | break; // Do nothing. | |
1390 | } | |
1391 | } | |
1392 | } | |
1393 | ||
1394 | template <typename Range> | |
1395 | class arg_formatter_base { | |
1396 | public: | |
1397 | typedef typename Range::value_type char_type; | |
1398 | typedef decltype(internal::declval<Range>().begin()) iterator; | |
1399 | typedef basic_format_specs<char_type> format_specs; | |
1400 | ||
1401 | private: | |
1402 | typedef basic_writer<Range> writer_type; | |
1403 | writer_type writer_; | |
1404 | format_specs *specs_; | |
1405 | ||
1406 | struct char_writer { | |
1407 | char_type value; | |
eafe8130 TL |
1408 | |
1409 | size_t size() const { return 1; } | |
1410 | size_t width() const { return 1; } | |
1411 | ||
11fdf7f2 TL |
1412 | template <typename It> |
1413 | void operator()(It &&it) const { *it++ = value; } | |
1414 | }; | |
1415 | ||
1416 | void write_char(char_type value) { | |
1417 | if (specs_) | |
eafe8130 | 1418 | writer_.write_padded(*specs_, char_writer{value}); |
11fdf7f2 TL |
1419 | else |
1420 | writer_.write(value); | |
1421 | } | |
1422 | ||
1423 | void write_pointer(const void *p) { | |
1424 | format_specs specs = specs_ ? *specs_ : format_specs(); | |
eafe8130 TL |
1425 | specs.flags = HASH_FLAG; |
1426 | specs.type = 'x'; | |
11fdf7f2 TL |
1427 | writer_.write_int(reinterpret_cast<uintptr_t>(p), specs); |
1428 | } | |
1429 | ||
1430 | protected: | |
1431 | writer_type &writer() { return writer_; } | |
1432 | format_specs *spec() { return specs_; } | |
1433 | iterator out() { return writer_.out(); } | |
1434 | ||
1435 | void write(bool value) { | |
1436 | string_view sv(value ? "true" : "false"); | |
1437 | specs_ ? writer_.write_str(sv, *specs_) : writer_.write(sv); | |
1438 | } | |
1439 | ||
1440 | void write(const char_type *value) { | |
1441 | if (!value) | |
1442 | FMT_THROW(format_error("string pointer is null")); | |
1443 | auto length = std::char_traits<char_type>::length(value); | |
1444 | basic_string_view<char_type> sv(value, length); | |
1445 | specs_ ? writer_.write_str(sv, *specs_) : writer_.write(sv); | |
1446 | } | |
1447 | ||
1448 | public: | |
eafe8130 TL |
1449 | arg_formatter_base(Range r, format_specs *s, locale_ref loc) |
1450 | : writer_(r, loc), specs_(s) {} | |
11fdf7f2 TL |
1451 | |
1452 | iterator operator()(monostate) { | |
1453 | FMT_ASSERT(false, "invalid argument type"); | |
1454 | return out(); | |
1455 | } | |
1456 | ||
1457 | template <typename T> | |
eafe8130 TL |
1458 | typename std::enable_if< |
1459 | std::is_integral<T>::value || std::is_same<T, char_type>::value, | |
1460 | iterator>::type operator()(T value) { | |
11fdf7f2 TL |
1461 | // MSVC2013 fails to compile separate overloads for bool and char_type so |
1462 | // use std::is_same instead. | |
1463 | if (std::is_same<T, bool>::value) { | |
eafe8130 | 1464 | if (specs_ && specs_->type) |
11fdf7f2 TL |
1465 | return (*this)(value ? 1 : 0); |
1466 | write(value != 0); | |
1467 | } else if (std::is_same<T, char_type>::value) { | |
1468 | internal::handle_char_specs( | |
1469 | specs_, char_spec_handler(*this, static_cast<char_type>(value))); | |
1470 | } else { | |
1471 | specs_ ? writer_.write_int(value, *specs_) : writer_.write(value); | |
1472 | } | |
1473 | return out(); | |
1474 | } | |
1475 | ||
1476 | template <typename T> | |
1477 | typename std::enable_if<std::is_floating_point<T>::value, iterator>::type | |
1478 | operator()(T value) { | |
1479 | writer_.write_double(value, specs_ ? *specs_ : format_specs()); | |
1480 | return out(); | |
1481 | } | |
1482 | ||
1483 | struct char_spec_handler : internal::error_handler { | |
1484 | arg_formatter_base &formatter; | |
1485 | char_type value; | |
1486 | ||
1487 | char_spec_handler(arg_formatter_base& f, char_type val) | |
1488 | : formatter(f), value(val) {} | |
1489 | ||
1490 | void on_int() { | |
1491 | if (formatter.specs_) | |
1492 | formatter.writer_.write_int(value, *formatter.specs_); | |
1493 | else | |
1494 | formatter.writer_.write(value); | |
1495 | } | |
1496 | void on_char() { formatter.write_char(value); } | |
1497 | }; | |
1498 | ||
1499 | struct cstring_spec_handler : internal::error_handler { | |
1500 | arg_formatter_base &formatter; | |
1501 | const char_type *value; | |
1502 | ||
1503 | cstring_spec_handler(arg_formatter_base &f, const char_type *val) | |
1504 | : formatter(f), value(val) {} | |
1505 | ||
1506 | void on_string() { formatter.write(value); } | |
1507 | void on_pointer() { formatter.write_pointer(value); } | |
1508 | }; | |
1509 | ||
1510 | iterator operator()(const char_type *value) { | |
1511 | if (!specs_) return write(value), out(); | |
1512 | internal::handle_cstring_type_spec( | |
eafe8130 | 1513 | specs_->type, cstring_spec_handler(*this, value)); |
11fdf7f2 TL |
1514 | return out(); |
1515 | } | |
1516 | ||
1517 | iterator operator()(basic_string_view<char_type> value) { | |
1518 | if (specs_) { | |
1519 | internal::check_string_type_spec( | |
eafe8130 | 1520 | specs_->type, internal::error_handler()); |
11fdf7f2 TL |
1521 | writer_.write_str(value, *specs_); |
1522 | } else { | |
1523 | writer_.write(value); | |
1524 | } | |
1525 | return out(); | |
1526 | } | |
1527 | ||
1528 | iterator operator()(const void *value) { | |
1529 | if (specs_) | |
eafe8130 | 1530 | check_pointer_type_spec(specs_->type, internal::error_handler()); |
11fdf7f2 TL |
1531 | write_pointer(value); |
1532 | return out(); | |
1533 | } | |
1534 | }; | |
1535 | ||
1536 | template <typename Char> | |
1537 | FMT_CONSTEXPR bool is_name_start(Char c) { | |
1538 | return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c; | |
1539 | } | |
1540 | ||
1541 | // DEPRECATED: Parses the input as an unsigned integer. This function assumes | |
1542 | // that the first character is a digit and presence of a non-digit character at | |
1543 | // the end. | |
1544 | // it: an iterator pointing to the beginning of the input range. | |
1545 | template <typename Iterator, typename ErrorHandler> | |
1546 | FMT_CONSTEXPR unsigned parse_nonnegative_int(Iterator &it, ErrorHandler &&eh) { | |
1547 | assert('0' <= *it && *it <= '9'); | |
eafe8130 TL |
1548 | if (*it == '0') { |
1549 | ++it; | |
1550 | return 0; | |
1551 | } | |
11fdf7f2 TL |
1552 | unsigned value = 0; |
1553 | // Convert to unsigned to prevent a warning. | |
1554 | unsigned max_int = (std::numeric_limits<int>::max)(); | |
1555 | unsigned big = max_int / 10; | |
1556 | do { | |
1557 | // Check for overflow. | |
1558 | if (value > big) { | |
1559 | value = max_int + 1; | |
1560 | break; | |
1561 | } | |
1562 | value = value * 10 + unsigned(*it - '0'); | |
1563 | // Workaround for MSVC "setup_exception stack overflow" error: | |
1564 | auto next = it; | |
1565 | ++next; | |
1566 | it = next; | |
1567 | } while ('0' <= *it && *it <= '9'); | |
1568 | if (value > max_int) | |
1569 | eh.on_error("number is too big"); | |
1570 | return value; | |
1571 | } | |
1572 | ||
1573 | // Parses the range [begin, end) as an unsigned integer. This function assumes | |
1574 | // that the range is non-empty and the first character is a digit. | |
1575 | template <typename Char, typename ErrorHandler> | |
1576 | FMT_CONSTEXPR unsigned parse_nonnegative_int( | |
1577 | const Char *&begin, const Char *end, ErrorHandler &&eh) { | |
1578 | assert(begin != end && '0' <= *begin && *begin <= '9'); | |
eafe8130 TL |
1579 | if (*begin == '0') { |
1580 | ++begin; | |
1581 | return 0; | |
1582 | } | |
11fdf7f2 TL |
1583 | unsigned value = 0; |
1584 | // Convert to unsigned to prevent a warning. | |
1585 | unsigned max_int = (std::numeric_limits<int>::max)(); | |
1586 | unsigned big = max_int / 10; | |
1587 | do { | |
1588 | // Check for overflow. | |
1589 | if (value > big) { | |
1590 | value = max_int + 1; | |
1591 | break; | |
1592 | } | |
eafe8130 TL |
1593 | value = value * 10 + unsigned(*begin - '0'); |
1594 | ++begin; | |
11fdf7f2 TL |
1595 | } while (begin != end && '0' <= *begin && *begin <= '9'); |
1596 | if (value > max_int) | |
1597 | eh.on_error("number is too big"); | |
1598 | return value; | |
1599 | } | |
1600 | ||
1601 | template <typename Char, typename Context> | |
1602 | class custom_formatter: public function<bool> { | |
1603 | private: | |
1604 | Context &ctx_; | |
1605 | ||
1606 | public: | |
1607 | explicit custom_formatter(Context &ctx): ctx_(ctx) {} | |
1608 | ||
1609 | bool operator()(typename basic_format_arg<Context>::handle h) const { | |
1610 | h.format(ctx_); | |
1611 | return true; | |
1612 | } | |
1613 | ||
1614 | template <typename T> | |
1615 | bool operator()(T) const { return false; } | |
1616 | }; | |
1617 | ||
1618 | template <typename T> | |
1619 | struct is_integer { | |
1620 | enum { | |
1621 | value = std::is_integral<T>::value && !std::is_same<T, bool>::value && | |
1622 | !std::is_same<T, char>::value && !std::is_same<T, wchar_t>::value | |
1623 | }; | |
1624 | }; | |
1625 | ||
1626 | template <typename ErrorHandler> | |
1627 | class width_checker: public function<unsigned long long> { | |
1628 | public: | |
1629 | explicit FMT_CONSTEXPR width_checker(ErrorHandler &eh) : handler_(eh) {} | |
1630 | ||
1631 | template <typename T> | |
1632 | FMT_CONSTEXPR | |
1633 | typename std::enable_if< | |
1634 | is_integer<T>::value, unsigned long long>::type operator()(T value) { | |
1635 | if (is_negative(value)) | |
1636 | handler_.on_error("negative width"); | |
1637 | return static_cast<unsigned long long>(value); | |
1638 | } | |
1639 | ||
1640 | template <typename T> | |
1641 | FMT_CONSTEXPR typename std::enable_if< | |
1642 | !is_integer<T>::value, unsigned long long>::type operator()(T) { | |
1643 | handler_.on_error("width is not integer"); | |
1644 | return 0; | |
1645 | } | |
1646 | ||
1647 | private: | |
1648 | ErrorHandler &handler_; | |
1649 | }; | |
1650 | ||
1651 | template <typename ErrorHandler> | |
1652 | class precision_checker: public function<unsigned long long> { | |
1653 | public: | |
1654 | explicit FMT_CONSTEXPR precision_checker(ErrorHandler &eh) : handler_(eh) {} | |
1655 | ||
1656 | template <typename T> | |
1657 | FMT_CONSTEXPR typename std::enable_if< | |
1658 | is_integer<T>::value, unsigned long long>::type operator()(T value) { | |
1659 | if (is_negative(value)) | |
1660 | handler_.on_error("negative precision"); | |
1661 | return static_cast<unsigned long long>(value); | |
1662 | } | |
1663 | ||
1664 | template <typename T> | |
1665 | FMT_CONSTEXPR typename std::enable_if< | |
1666 | !is_integer<T>::value, unsigned long long>::type operator()(T) { | |
1667 | handler_.on_error("precision is not integer"); | |
1668 | return 0; | |
1669 | } | |
1670 | ||
1671 | private: | |
1672 | ErrorHandler &handler_; | |
1673 | }; | |
1674 | ||
1675 | // A format specifier handler that sets fields in basic_format_specs. | |
1676 | template <typename Char> | |
1677 | class specs_setter { | |
1678 | public: | |
1679 | explicit FMT_CONSTEXPR specs_setter(basic_format_specs<Char> &specs): | |
1680 | specs_(specs) {} | |
1681 | ||
eafe8130 | 1682 | FMT_CONSTEXPR specs_setter(const specs_setter &other): specs_(other.specs_) {} |
11fdf7f2 TL |
1683 | |
1684 | FMT_CONSTEXPR void on_align(alignment align) { specs_.align_ = align; } | |
1685 | FMT_CONSTEXPR void on_fill(Char fill) { specs_.fill_ = fill; } | |
eafe8130 TL |
1686 | FMT_CONSTEXPR void on_plus() { specs_.flags |= SIGN_FLAG | PLUS_FLAG; } |
1687 | FMT_CONSTEXPR void on_minus() { specs_.flags |= MINUS_FLAG; } | |
1688 | FMT_CONSTEXPR void on_space() { specs_.flags |= SIGN_FLAG; } | |
1689 | FMT_CONSTEXPR void on_hash() { specs_.flags |= HASH_FLAG; } | |
11fdf7f2 TL |
1690 | |
1691 | FMT_CONSTEXPR void on_zero() { | |
1692 | specs_.align_ = ALIGN_NUMERIC; | |
1693 | specs_.fill_ = '0'; | |
1694 | } | |
1695 | ||
1696 | FMT_CONSTEXPR void on_width(unsigned width) { specs_.width_ = width; } | |
1697 | FMT_CONSTEXPR void on_precision(unsigned precision) { | |
eafe8130 | 1698 | specs_.precision = static_cast<int>(precision); |
11fdf7f2 TL |
1699 | } |
1700 | FMT_CONSTEXPR void end_precision() {} | |
1701 | ||
eafe8130 TL |
1702 | FMT_CONSTEXPR void on_type(Char type) { |
1703 | specs_.type = static_cast<char>(type); | |
1704 | } | |
11fdf7f2 TL |
1705 | |
1706 | protected: | |
1707 | basic_format_specs<Char> &specs_; | |
1708 | }; | |
1709 | ||
1710 | // A format specifier handler that checks if specifiers are consistent with the | |
1711 | // argument type. | |
1712 | template <typename Handler> | |
1713 | class specs_checker : public Handler { | |
1714 | public: | |
1715 | FMT_CONSTEXPR specs_checker(const Handler& handler, internal::type arg_type) | |
1716 | : Handler(handler), arg_type_(arg_type) {} | |
1717 | ||
1718 | FMT_CONSTEXPR specs_checker(const specs_checker &other) | |
1719 | : Handler(other), arg_type_(other.arg_type_) {} | |
1720 | ||
1721 | FMT_CONSTEXPR void on_align(alignment align) { | |
1722 | if (align == ALIGN_NUMERIC) | |
1723 | require_numeric_argument(); | |
1724 | Handler::on_align(align); | |
1725 | } | |
1726 | ||
1727 | FMT_CONSTEXPR void on_plus() { | |
1728 | check_sign(); | |
1729 | Handler::on_plus(); | |
1730 | } | |
1731 | ||
1732 | FMT_CONSTEXPR void on_minus() { | |
1733 | check_sign(); | |
1734 | Handler::on_minus(); | |
1735 | } | |
1736 | ||
1737 | FMT_CONSTEXPR void on_space() { | |
1738 | check_sign(); | |
1739 | Handler::on_space(); | |
1740 | } | |
1741 | ||
1742 | FMT_CONSTEXPR void on_hash() { | |
1743 | require_numeric_argument(); | |
1744 | Handler::on_hash(); | |
1745 | } | |
1746 | ||
1747 | FMT_CONSTEXPR void on_zero() { | |
1748 | require_numeric_argument(); | |
1749 | Handler::on_zero(); | |
1750 | } | |
1751 | ||
1752 | FMT_CONSTEXPR void end_precision() { | |
1753 | if (is_integral(arg_type_) || arg_type_ == pointer_type) | |
1754 | this->on_error("precision not allowed for this argument type"); | |
1755 | } | |
1756 | ||
1757 | private: | |
1758 | FMT_CONSTEXPR void require_numeric_argument() { | |
1759 | if (!is_arithmetic(arg_type_)) | |
1760 | this->on_error("format specifier requires numeric argument"); | |
1761 | } | |
1762 | ||
1763 | FMT_CONSTEXPR void check_sign() { | |
1764 | require_numeric_argument(); | |
1765 | if (is_integral(arg_type_) && arg_type_ != int_type && | |
1766 | arg_type_ != long_long_type && arg_type_ != internal::char_type) { | |
1767 | this->on_error("format specifier requires signed argument"); | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | internal::type arg_type_; | |
1772 | }; | |
1773 | ||
1774 | template <template <typename> class Handler, typename T, | |
1775 | typename Context, typename ErrorHandler> | |
1776 | FMT_CONSTEXPR void set_dynamic_spec( | |
1777 | T &value, basic_format_arg<Context> arg, ErrorHandler eh) { | |
eafe8130 TL |
1778 | unsigned long long big_value = |
1779 | visit_format_arg(Handler<ErrorHandler>(eh), arg); | |
1780 | if (big_value > to_unsigned((std::numeric_limits<int>::max)())) | |
11fdf7f2 TL |
1781 | eh.on_error("number is too big"); |
1782 | value = static_cast<T>(big_value); | |
1783 | } | |
1784 | ||
1785 | struct auto_id {}; | |
1786 | ||
1787 | // The standard format specifier handler with checking. | |
1788 | template <typename Context> | |
1789 | class specs_handler: public specs_setter<typename Context::char_type> { | |
1790 | public: | |
1791 | typedef typename Context::char_type char_type; | |
1792 | ||
1793 | FMT_CONSTEXPR specs_handler( | |
1794 | basic_format_specs<char_type> &specs, Context &ctx) | |
1795 | : specs_setter<char_type>(specs), context_(ctx) {} | |
1796 | ||
1797 | template <typename Id> | |
1798 | FMT_CONSTEXPR void on_dynamic_width(Id arg_id) { | |
1799 | set_dynamic_spec<width_checker>( | |
1800 | this->specs_.width_, get_arg(arg_id), context_.error_handler()); | |
1801 | } | |
1802 | ||
1803 | template <typename Id> | |
1804 | FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) { | |
1805 | set_dynamic_spec<precision_checker>( | |
eafe8130 | 1806 | this->specs_.precision, get_arg(arg_id), context_.error_handler()); |
11fdf7f2 TL |
1807 | } |
1808 | ||
1809 | void on_error(const char *message) { | |
1810 | context_.on_error(message); | |
1811 | } | |
1812 | ||
1813 | private: | |
1814 | FMT_CONSTEXPR basic_format_arg<Context> get_arg(auto_id) { | |
1815 | return context_.next_arg(); | |
1816 | } | |
1817 | ||
1818 | template <typename Id> | |
1819 | FMT_CONSTEXPR basic_format_arg<Context> get_arg(Id arg_id) { | |
1820 | context_.parse_context().check_arg_id(arg_id); | |
1821 | return context_.get_arg(arg_id); | |
1822 | } | |
1823 | ||
1824 | Context &context_; | |
1825 | }; | |
1826 | ||
1827 | // An argument reference. | |
1828 | template <typename Char> | |
1829 | struct arg_ref { | |
1830 | enum Kind { NONE, INDEX, NAME }; | |
1831 | ||
1832 | FMT_CONSTEXPR arg_ref() : kind(NONE), index(0) {} | |
1833 | FMT_CONSTEXPR explicit arg_ref(unsigned index) : kind(INDEX), index(index) {} | |
eafe8130 TL |
1834 | explicit arg_ref(basic_string_view<Char> nm) : kind(NAME) { |
1835 | name = {nm.data(), nm.size()}; | |
1836 | } | |
11fdf7f2 TL |
1837 | |
1838 | FMT_CONSTEXPR arg_ref &operator=(unsigned idx) { | |
1839 | kind = INDEX; | |
1840 | index = idx; | |
1841 | return *this; | |
1842 | } | |
1843 | ||
1844 | Kind kind; | |
eafe8130 | 1845 | union { |
11fdf7f2 | 1846 | unsigned index; |
eafe8130 | 1847 | string_value<Char> name; // This is not string_view because of gcc 4.4. |
11fdf7f2 TL |
1848 | }; |
1849 | }; | |
1850 | ||
1851 | // Format specifiers with width and precision resolved at formatting rather | |
1852 | // than parsing time to allow re-using the same parsed specifiers with | |
1853 | // differents sets of arguments (precompilation of format strings). | |
1854 | template <typename Char> | |
1855 | struct dynamic_format_specs : basic_format_specs<Char> { | |
1856 | arg_ref<Char> width_ref; | |
1857 | arg_ref<Char> precision_ref; | |
1858 | }; | |
1859 | ||
1860 | // Format spec handler that saves references to arguments representing dynamic | |
1861 | // width and precision to be resolved at formatting time. | |
1862 | template <typename ParseContext> | |
1863 | class dynamic_specs_handler : | |
1864 | public specs_setter<typename ParseContext::char_type> { | |
1865 | public: | |
1866 | typedef typename ParseContext::char_type char_type; | |
1867 | ||
1868 | FMT_CONSTEXPR dynamic_specs_handler( | |
1869 | dynamic_format_specs<char_type> &specs, ParseContext &ctx) | |
1870 | : specs_setter<char_type>(specs), specs_(specs), context_(ctx) {} | |
1871 | ||
1872 | FMT_CONSTEXPR dynamic_specs_handler(const dynamic_specs_handler &other) | |
1873 | : specs_setter<char_type>(other), | |
1874 | specs_(other.specs_), context_(other.context_) {} | |
1875 | ||
1876 | template <typename Id> | |
1877 | FMT_CONSTEXPR void on_dynamic_width(Id arg_id) { | |
1878 | specs_.width_ref = make_arg_ref(arg_id); | |
1879 | } | |
1880 | ||
1881 | template <typename Id> | |
1882 | FMT_CONSTEXPR void on_dynamic_precision(Id arg_id) { | |
1883 | specs_.precision_ref = make_arg_ref(arg_id); | |
1884 | } | |
1885 | ||
1886 | FMT_CONSTEXPR void on_error(const char *message) { | |
1887 | context_.on_error(message); | |
1888 | } | |
1889 | ||
1890 | private: | |
1891 | typedef arg_ref<char_type> arg_ref_type; | |
1892 | ||
1893 | template <typename Id> | |
1894 | FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) { | |
1895 | context_.check_arg_id(arg_id); | |
1896 | return arg_ref_type(arg_id); | |
1897 | } | |
1898 | ||
1899 | FMT_CONSTEXPR arg_ref_type make_arg_ref(auto_id) { | |
1900 | return arg_ref_type(context_.next_arg_id()); | |
1901 | } | |
1902 | ||
1903 | dynamic_format_specs<char_type> &specs_; | |
1904 | ParseContext &context_; | |
1905 | }; | |
1906 | ||
1907 | template <typename Iterator, typename IDHandler> | |
1908 | FMT_CONSTEXPR Iterator parse_arg_id(Iterator it, IDHandler &&handler) { | |
1909 | typedef typename std::iterator_traits<Iterator>::value_type char_type; | |
1910 | char_type c = *it; | |
1911 | if (c == '}' || c == ':') { | |
1912 | handler(); | |
1913 | return it; | |
1914 | } | |
1915 | if (c >= '0' && c <= '9') { | |
1916 | unsigned index = parse_nonnegative_int(it, handler); | |
1917 | if (*it != '}' && *it != ':') { | |
1918 | handler.on_error("invalid format string"); | |
1919 | return it; | |
1920 | } | |
1921 | handler(index); | |
1922 | return it; | |
1923 | } | |
1924 | if (!is_name_start(c)) { | |
1925 | handler.on_error("invalid format string"); | |
1926 | return it; | |
1927 | } | |
1928 | auto start = it; | |
1929 | do { | |
1930 | c = *++it; | |
1931 | } while (is_name_start(c) || ('0' <= c && c <= '9')); | |
1932 | handler(basic_string_view<char_type>( | |
1933 | pointer_from(start), to_unsigned(it - start))); | |
1934 | return it; | |
1935 | } | |
1936 | ||
1937 | template <typename Char, typename IDHandler> | |
1938 | FMT_CONSTEXPR const Char *parse_arg_id( | |
1939 | const Char *begin, const Char *end, IDHandler &&handler) { | |
1940 | assert(begin != end); | |
1941 | Char c = *begin; | |
1942 | if (c == '}' || c == ':') | |
1943 | return handler(), begin; | |
1944 | if (c >= '0' && c <= '9') { | |
1945 | unsigned index = parse_nonnegative_int(begin, end, handler); | |
1946 | if (begin == end || (*begin != '}' && *begin != ':')) | |
1947 | return handler.on_error("invalid format string"), begin; | |
1948 | handler(index); | |
1949 | return begin; | |
1950 | } | |
1951 | if (!is_name_start(c)) | |
1952 | return handler.on_error("invalid format string"), begin; | |
1953 | auto it = begin; | |
1954 | do { | |
1955 | c = *++it; | |
1956 | } while (it != end && (is_name_start(c) || ('0' <= c && c <= '9'))); | |
1957 | handler(basic_string_view<Char>(begin, to_unsigned(it - begin))); | |
1958 | return it; | |
1959 | } | |
1960 | ||
1961 | // Adapts SpecHandler to IDHandler API for dynamic width. | |
1962 | template <typename SpecHandler, typename Char> | |
1963 | struct width_adapter { | |
1964 | explicit FMT_CONSTEXPR width_adapter(SpecHandler &h) : handler(h) {} | |
1965 | ||
1966 | FMT_CONSTEXPR void operator()() { handler.on_dynamic_width(auto_id()); } | |
1967 | FMT_CONSTEXPR void operator()(unsigned id) { handler.on_dynamic_width(id); } | |
1968 | FMT_CONSTEXPR void operator()(basic_string_view<Char> id) { | |
1969 | handler.on_dynamic_width(id); | |
1970 | } | |
1971 | ||
1972 | FMT_CONSTEXPR void on_error(const char *message) { | |
1973 | handler.on_error(message); | |
1974 | } | |
1975 | ||
1976 | SpecHandler &handler; | |
1977 | }; | |
1978 | ||
1979 | // Adapts SpecHandler to IDHandler API for dynamic precision. | |
1980 | template <typename SpecHandler, typename Char> | |
1981 | struct precision_adapter { | |
1982 | explicit FMT_CONSTEXPR precision_adapter(SpecHandler &h) : handler(h) {} | |
1983 | ||
1984 | FMT_CONSTEXPR void operator()() { handler.on_dynamic_precision(auto_id()); } | |
1985 | FMT_CONSTEXPR void operator()(unsigned id) { | |
1986 | handler.on_dynamic_precision(id); | |
1987 | } | |
1988 | FMT_CONSTEXPR void operator()(basic_string_view<Char> id) { | |
1989 | handler.on_dynamic_precision(id); | |
1990 | } | |
1991 | ||
1992 | FMT_CONSTEXPR void on_error(const char *message) { handler.on_error(message); } | |
1993 | ||
1994 | SpecHandler &handler; | |
1995 | }; | |
1996 | ||
1997 | // Parses standard format specifiers and sends notifications about parsed | |
1998 | // components to handler. | |
1999 | // it: an iterator pointing to the beginning of a null-terminated range of | |
2000 | // characters, possibly emulated via null_terminating_iterator, representing | |
2001 | // format specifiers. | |
2002 | template <typename Iterator, typename SpecHandler> | |
2003 | FMT_CONSTEXPR Iterator parse_format_specs(Iterator it, SpecHandler &&handler) { | |
2004 | typedef typename std::iterator_traits<Iterator>::value_type char_type; | |
2005 | char_type c = *it; | |
2006 | if (c == '}' || !c) | |
2007 | return it; | |
2008 | ||
2009 | // Parse fill and alignment. | |
2010 | alignment align = ALIGN_DEFAULT; | |
2011 | int i = 1; | |
2012 | do { | |
2013 | auto p = it + i; | |
eafe8130 TL |
2014 | switch (static_cast<char>(*p)) { |
2015 | case '<': | |
2016 | align = ALIGN_LEFT; | |
2017 | break; | |
2018 | case '>': | |
2019 | align = ALIGN_RIGHT; | |
2020 | break; | |
2021 | case '=': | |
2022 | align = ALIGN_NUMERIC; | |
2023 | break; | |
2024 | case '^': | |
2025 | align = ALIGN_CENTER; | |
2026 | break; | |
11fdf7f2 TL |
2027 | } |
2028 | if (align != ALIGN_DEFAULT) { | |
2029 | if (p != it) { | |
2030 | if (c == '{') { | |
2031 | handler.on_error("invalid fill character '{'"); | |
2032 | return it; | |
2033 | } | |
2034 | it += 2; | |
2035 | handler.on_fill(c); | |
2036 | } else ++it; | |
2037 | handler.on_align(align); | |
2038 | break; | |
2039 | } | |
2040 | } while (--i >= 0); | |
2041 | ||
2042 | // Parse sign. | |
eafe8130 TL |
2043 | switch (static_cast<char>(*it)) { |
2044 | case '+': | |
2045 | handler.on_plus(); | |
2046 | ++it; | |
2047 | break; | |
2048 | case '-': | |
2049 | handler.on_minus(); | |
2050 | ++it; | |
2051 | break; | |
2052 | case ' ': | |
2053 | handler.on_space(); | |
2054 | ++it; | |
2055 | break; | |
11fdf7f2 TL |
2056 | } |
2057 | ||
2058 | if (*it == '#') { | |
2059 | handler.on_hash(); | |
2060 | ++it; | |
2061 | } | |
2062 | ||
2063 | // Parse zero flag. | |
2064 | if (*it == '0') { | |
2065 | handler.on_zero(); | |
2066 | ++it; | |
2067 | } | |
2068 | ||
2069 | // Parse width. | |
2070 | if ('0' <= *it && *it <= '9') { | |
2071 | handler.on_width(parse_nonnegative_int(it, handler)); | |
2072 | } else if (*it == '{') { | |
2073 | it = parse_arg_id(it + 1, width_adapter<SpecHandler, char_type>(handler)); | |
2074 | if (*it++ != '}') { | |
2075 | handler.on_error("invalid format string"); | |
2076 | return it; | |
2077 | } | |
2078 | } | |
2079 | ||
2080 | // Parse precision. | |
2081 | if (*it == '.') { | |
2082 | ++it; | |
2083 | if ('0' <= *it && *it <= '9') { | |
2084 | handler.on_precision(parse_nonnegative_int(it, handler)); | |
2085 | } else if (*it == '{') { | |
2086 | it = parse_arg_id( | |
2087 | it + 1, precision_adapter<SpecHandler, char_type>(handler)); | |
2088 | if (*it++ != '}') { | |
2089 | handler.on_error("invalid format string"); | |
2090 | return it; | |
2091 | } | |
2092 | } else { | |
2093 | handler.on_error("missing precision specifier"); | |
2094 | return it; | |
2095 | } | |
2096 | handler.end_precision(); | |
2097 | } | |
2098 | ||
2099 | // Parse type. | |
2100 | if (*it != '}' && *it) | |
2101 | handler.on_type(*it++); | |
2102 | return it; | |
2103 | } | |
2104 | ||
2105 | // Return the result via the out param to workaround gcc bug 77539. | |
2106 | template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*> | |
2107 | FMT_CONSTEXPR bool find(Ptr first, Ptr last, T value, Ptr &out) { | |
2108 | for (out = first; out != last; ++out) { | |
2109 | if (*out == value) | |
2110 | return true; | |
2111 | } | |
2112 | return false; | |
2113 | } | |
2114 | ||
2115 | template <> | |
2116 | inline bool find<false, char>( | |
2117 | const char *first, const char *last, char value, const char *&out) { | |
2118 | out = static_cast<const char*>(std::memchr(first, value, last - first)); | |
2119 | return out != FMT_NULL; | |
2120 | } | |
2121 | ||
2122 | template <typename Handler, typename Char> | |
2123 | struct id_adapter { | |
2124 | FMT_CONSTEXPR void operator()() { handler.on_arg_id(); } | |
2125 | FMT_CONSTEXPR void operator()(unsigned id) { handler.on_arg_id(id); } | |
2126 | FMT_CONSTEXPR void operator()(basic_string_view<Char> id) { | |
2127 | handler.on_arg_id(id); | |
2128 | } | |
2129 | FMT_CONSTEXPR void on_error(const char *message) { | |
2130 | handler.on_error(message); | |
2131 | } | |
2132 | Handler &handler; | |
2133 | }; | |
2134 | ||
2135 | template <bool IS_CONSTEXPR, typename Char, typename Handler> | |
2136 | FMT_CONSTEXPR void parse_format_string( | |
2137 | basic_string_view<Char> format_str, Handler &&handler) { | |
2138 | struct writer { | |
2139 | FMT_CONSTEXPR void operator()(const Char *begin, const Char *end) { | |
2140 | if (begin == end) return; | |
2141 | for (;;) { | |
2142 | const Char *p = FMT_NULL; | |
2143 | if (!find<IS_CONSTEXPR>(begin, end, '}', p)) | |
2144 | return handler_.on_text(begin, end); | |
2145 | ++p; | |
2146 | if (p == end || *p != '}') | |
2147 | return handler_.on_error("unmatched '}' in format string"); | |
2148 | handler_.on_text(begin, p); | |
2149 | begin = p + 1; | |
2150 | } | |
2151 | } | |
2152 | Handler &handler_; | |
2153 | } write{handler}; | |
eafe8130 TL |
2154 | auto begin = format_str.data(); |
2155 | auto end = begin + format_str.size(); | |
11fdf7f2 TL |
2156 | while (begin != end) { |
2157 | // Doing two passes with memchr (one for '{' and another for '}') is up to | |
2158 | // 2.5x faster than the naive one-pass implementation on big format strings. | |
2159 | const Char *p = begin; | |
2160 | if (*begin != '{' && !find<IS_CONSTEXPR>(begin, end, '{', p)) | |
2161 | return write(begin, end); | |
2162 | write(begin, p); | |
2163 | ++p; | |
2164 | if (p == end) | |
2165 | return handler.on_error("invalid format string"); | |
eafe8130 | 2166 | if (static_cast<char>(*p) == '}') { |
11fdf7f2 TL |
2167 | handler.on_arg_id(); |
2168 | handler.on_replacement_field(p); | |
2169 | } else if (*p == '{') { | |
2170 | handler.on_text(p, p + 1); | |
2171 | } else { | |
2172 | p = parse_arg_id(p, end, id_adapter<Handler, Char>{handler}); | |
eafe8130 | 2173 | Char c = p != end ? *p : Char(); |
11fdf7f2 TL |
2174 | if (c == '}') { |
2175 | handler.on_replacement_field(p); | |
2176 | } else if (c == ':') { | |
2177 | internal::null_terminating_iterator<Char> it(p + 1, end); | |
2178 | it = handler.on_format_specs(it); | |
2179 | if (*it != '}') | |
2180 | return handler.on_error("unknown format specifier"); | |
2181 | p = pointer_from(it); | |
2182 | } else { | |
2183 | return handler.on_error("missing '}' in format string"); | |
2184 | } | |
2185 | } | |
2186 | begin = p + 1; | |
2187 | } | |
2188 | } | |
2189 | ||
2190 | template <typename T, typename ParseContext> | |
2191 | FMT_CONSTEXPR const typename ParseContext::char_type * | |
2192 | parse_format_specs(ParseContext &ctx) { | |
2193 | // GCC 7.2 requires initializer. | |
2194 | formatter<T, typename ParseContext::char_type> f{}; | |
2195 | return f.parse(ctx); | |
2196 | } | |
2197 | ||
2198 | template <typename Char, typename ErrorHandler, typename... Args> | |
2199 | class format_string_checker { | |
2200 | public: | |
2201 | explicit FMT_CONSTEXPR format_string_checker( | |
2202 | basic_string_view<Char> format_str, ErrorHandler eh) | |
2203 | : arg_id_(-1), context_(format_str, eh), | |
2204 | parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {} | |
2205 | ||
2206 | typedef internal::null_terminating_iterator<Char> iterator; | |
2207 | ||
2208 | FMT_CONSTEXPR void on_text(const Char *, const Char *) {} | |
2209 | ||
2210 | FMT_CONSTEXPR void on_arg_id() { | |
2211 | arg_id_ = context_.next_arg_id(); | |
2212 | check_arg_id(); | |
2213 | } | |
2214 | FMT_CONSTEXPR void on_arg_id(unsigned id) { | |
2215 | arg_id_ = id; | |
2216 | context_.check_arg_id(id); | |
2217 | check_arg_id(); | |
2218 | } | |
2219 | FMT_CONSTEXPR void on_arg_id(basic_string_view<Char>) {} | |
2220 | ||
2221 | FMT_CONSTEXPR void on_replacement_field(const Char *) {} | |
2222 | ||
2223 | FMT_CONSTEXPR const Char *on_format_specs(iterator it) { | |
2224 | auto p = pointer_from(it); | |
2225 | context_.advance_to(p); | |
2226 | return to_unsigned(arg_id_) < NUM_ARGS ? | |
2227 | parse_funcs_[arg_id_](context_) : p; | |
2228 | } | |
2229 | ||
2230 | FMT_CONSTEXPR void on_error(const char *message) { | |
2231 | context_.on_error(message); | |
2232 | } | |
2233 | ||
2234 | private: | |
2235 | typedef basic_parse_context<Char, ErrorHandler> parse_context_type; | |
2236 | enum { NUM_ARGS = sizeof...(Args) }; | |
2237 | ||
2238 | FMT_CONSTEXPR void check_arg_id() { | |
2239 | if (internal::to_unsigned(arg_id_) >= NUM_ARGS) | |
2240 | context_.on_error("argument index out of range"); | |
2241 | } | |
2242 | ||
2243 | // Format specifier parsing function. | |
2244 | typedef const Char *(*parse_func)(parse_context_type &); | |
2245 | ||
2246 | int arg_id_; | |
2247 | parse_context_type context_; | |
2248 | parse_func parse_funcs_[NUM_ARGS > 0 ? NUM_ARGS : 1]; | |
2249 | }; | |
2250 | ||
2251 | template <typename Char, typename ErrorHandler, typename... Args> | |
eafe8130 | 2252 | FMT_CONSTEXPR bool do_check_format_string( |
11fdf7f2 TL |
2253 | basic_string_view<Char> s, ErrorHandler eh = ErrorHandler()) { |
2254 | format_string_checker<Char, ErrorHandler, Args...> checker(s, eh); | |
2255 | parse_format_string<true>(s, checker); | |
2256 | return true; | |
2257 | } | |
2258 | ||
eafe8130 TL |
2259 | template <typename... Args, typename S> |
2260 | typename std::enable_if<is_compile_string<S>::value>::type | |
2261 | check_format_string(S format_str) { | |
2262 | typedef typename S::char_type char_t; | |
2263 | FMT_CONSTEXPR_DECL bool invalid_format = internal::do_check_format_string< | |
2264 | char_t, internal::error_handler, Args...>(to_string_view(format_str)); | |
11fdf7f2 TL |
2265 | (void)invalid_format; |
2266 | } | |
2267 | ||
2268 | // Specifies whether to format T using the standard formatter. | |
2269 | // It is not possible to use get_type in formatter specialization directly | |
2270 | // because of a bug in MSVC. | |
2271 | template <typename Context, typename T> | |
2272 | struct format_type : | |
2273 | std::integral_constant<bool, get_type<Context, T>::value != custom_type> {}; | |
2274 | ||
2275 | template <template <typename> class Handler, typename Spec, typename Context> | |
2276 | void handle_dynamic_spec( | |
2277 | Spec &value, arg_ref<typename Context::char_type> ref, Context &ctx) { | |
2278 | typedef typename Context::char_type char_type; | |
2279 | switch (ref.kind) { | |
2280 | case arg_ref<char_type>::NONE: | |
2281 | break; | |
2282 | case arg_ref<char_type>::INDEX: | |
2283 | internal::set_dynamic_spec<Handler>( | |
2284 | value, ctx.get_arg(ref.index), ctx.error_handler()); | |
2285 | break; | |
2286 | case arg_ref<char_type>::NAME: | |
2287 | internal::set_dynamic_spec<Handler>( | |
eafe8130 TL |
2288 | value, ctx.get_arg({ref.name.value, ref.name.size}), |
2289 | ctx.error_handler()); | |
11fdf7f2 TL |
2290 | break; |
2291 | } | |
2292 | } | |
2293 | } // namespace internal | |
2294 | ||
2295 | /** The default argument formatter. */ | |
2296 | template <typename Range> | |
2297 | class arg_formatter: | |
2298 | public internal::function< | |
2299 | typename internal::arg_formatter_base<Range>::iterator>, | |
2300 | public internal::arg_formatter_base<Range> { | |
2301 | private: | |
2302 | typedef typename Range::value_type char_type; | |
2303 | typedef internal::arg_formatter_base<Range> base; | |
2304 | typedef basic_format_context<typename base::iterator, char_type> context_type; | |
2305 | ||
2306 | context_type &ctx_; | |
2307 | ||
2308 | public: | |
2309 | typedef Range range; | |
2310 | typedef typename base::iterator iterator; | |
2311 | typedef typename base::format_specs format_specs; | |
2312 | ||
2313 | /** | |
2314 | \rst | |
2315 | Constructs an argument formatter object. | |
2316 | *ctx* is a reference to the formatting context, | |
2317 | *spec* contains format specifier information for standard argument types. | |
2318 | \endrst | |
2319 | */ | |
eafe8130 TL |
2320 | explicit arg_formatter(context_type &ctx, format_specs *spec = FMT_NULL) |
2321 | : base(Range(ctx.out()), spec, ctx.locale()), ctx_(ctx) {} | |
11fdf7f2 TL |
2322 | |
2323 | // Deprecated. | |
2324 | arg_formatter(context_type &ctx, format_specs &spec) | |
2325 | : base(Range(ctx.out()), &spec), ctx_(ctx) {} | |
2326 | ||
2327 | using base::operator(); | |
2328 | ||
2329 | /** Formats an argument of a user-defined type. */ | |
2330 | iterator operator()(typename basic_format_arg<context_type>::handle handle) { | |
2331 | handle.format(ctx_); | |
2332 | return this->out(); | |
2333 | } | |
2334 | }; | |
2335 | ||
2336 | /** | |
2337 | An error returned by an operating system or a language runtime, | |
2338 | for example a file opening error. | |
2339 | */ | |
2340 | class system_error : public std::runtime_error { | |
2341 | private: | |
2342 | FMT_API void init(int err_code, string_view format_str, format_args args); | |
2343 | ||
2344 | protected: | |
2345 | int error_code_; | |
2346 | ||
2347 | system_error() : std::runtime_error("") {} | |
2348 | ||
2349 | public: | |
2350 | /** | |
2351 | \rst | |
2352 | Constructs a :class:`fmt::system_error` object with a description | |
2353 | formatted with `fmt::format_system_error`. *message* and additional | |
2354 | arguments passed into the constructor are formatted similarly to | |
2355 | `fmt::format`. | |
2356 | ||
2357 | **Example**:: | |
2358 | ||
2359 | // This throws a system_error with the description | |
2360 | // cannot open file 'madeup': No such file or directory | |
2361 | // or similar (system message may vary). | |
2362 | const char *filename = "madeup"; | |
2363 | std::FILE *file = std::fopen(filename, "r"); | |
2364 | if (!file) | |
2365 | throw fmt::system_error(errno, "cannot open file '{}'", filename); | |
2366 | \endrst | |
2367 | */ | |
2368 | template <typename... Args> | |
eafe8130 | 2369 | system_error(int error_code, string_view message, const Args &... args) |
11fdf7f2 TL |
2370 | : std::runtime_error("") { |
2371 | init(error_code, message, make_format_args(args...)); | |
2372 | } | |
2373 | ||
2374 | int error_code() const { return error_code_; } | |
2375 | }; | |
2376 | ||
2377 | /** | |
2378 | \rst | |
2379 | Formats an error returned by an operating system or a language runtime, | |
2380 | for example a file opening error, and writes it to *out* in the following | |
2381 | form: | |
2382 | ||
2383 | .. parsed-literal:: | |
2384 | *<message>*: *<system-message>* | |
2385 | ||
2386 | where *<message>* is the passed message and *<system-message>* is | |
2387 | the system message corresponding to the error code. | |
2388 | *error_code* is a system error code as given by ``errno``. | |
2389 | If *error_code* is not a valid error code such as -1, the system message | |
2390 | may look like "Unknown error -1" and is platform-dependent. | |
2391 | \endrst | |
2392 | */ | |
2393 | FMT_API void format_system_error(internal::buffer &out, int error_code, | |
2394 | fmt::string_view message) FMT_NOEXCEPT; | |
2395 | ||
2396 | /** | |
2397 | This template provides operations for formatting and writing data into a | |
2398 | character range. | |
2399 | */ | |
2400 | template <typename Range> | |
2401 | class basic_writer { | |
2402 | public: | |
2403 | typedef typename Range::value_type char_type; | |
2404 | typedef decltype(internal::declval<Range>().begin()) iterator; | |
2405 | typedef basic_format_specs<char_type> format_specs; | |
2406 | ||
2407 | private: | |
2408 | iterator out_; // Output iterator. | |
eafe8130 | 2409 | internal::locale_ref locale_; |
11fdf7f2 TL |
2410 | |
2411 | iterator out() const { return out_; } | |
2412 | ||
2413 | // Attempts to reserve space for n extra characters in the output range. | |
2414 | // Returns a pointer to the reserved range or a reference to out_. | |
2415 | auto reserve(std::size_t n) -> decltype(internal::reserve(out_, n)) { | |
2416 | return internal::reserve(out_, n); | |
2417 | } | |
2418 | ||
2419 | // Writes a value in the format | |
2420 | // <left-padding><value><right-padding> | |
2421 | // where <value> is written by f(it). | |
2422 | template <typename F> | |
eafe8130 | 2423 | void write_padded(const align_spec &spec, F &&f); |
11fdf7f2 TL |
2424 | |
2425 | template <typename F> | |
2426 | struct padded_int_writer { | |
eafe8130 | 2427 | size_t size_; |
11fdf7f2 TL |
2428 | string_view prefix; |
2429 | char_type fill; | |
2430 | std::size_t padding; | |
2431 | F f; | |
2432 | ||
eafe8130 TL |
2433 | size_t size() const { return size_; } |
2434 | size_t width() const { return size_; } | |
2435 | ||
11fdf7f2 TL |
2436 | template <typename It> |
2437 | void operator()(It &&it) const { | |
2438 | if (prefix.size() != 0) | |
eafe8130 | 2439 | it = internal::copy_str<char_type>(prefix.begin(), prefix.end(), it); |
11fdf7f2 TL |
2440 | it = std::fill_n(it, padding, fill); |
2441 | f(it); | |
2442 | } | |
2443 | }; | |
2444 | ||
2445 | // Writes an integer in the format | |
2446 | // <left-padding><prefix><numeric-padding><digits><right-padding> | |
2447 | // where <digits> are written by f(it). | |
2448 | template <typename Spec, typename F> | |
2449 | void write_int(unsigned num_digits, string_view prefix, | |
2450 | const Spec &spec, F f) { | |
2451 | std::size_t size = prefix.size() + num_digits; | |
2452 | char_type fill = static_cast<char_type>(spec.fill()); | |
2453 | std::size_t padding = 0; | |
2454 | if (spec.align() == ALIGN_NUMERIC) { | |
2455 | if (spec.width() > size) { | |
2456 | padding = spec.width() - size; | |
2457 | size = spec.width(); | |
2458 | } | |
eafe8130 TL |
2459 | } else if (spec.precision > static_cast<int>(num_digits)) { |
2460 | size = prefix.size() + internal::to_unsigned(spec.precision); | |
2461 | padding = internal::to_unsigned(spec.precision) - num_digits; | |
2462 | fill = static_cast<char_type>('0'); | |
11fdf7f2 TL |
2463 | } |
2464 | align_spec as = spec; | |
2465 | if (spec.align() == ALIGN_DEFAULT) | |
2466 | as.align_ = ALIGN_RIGHT; | |
eafe8130 | 2467 | write_padded(as, padded_int_writer<F>{size, prefix, fill, padding, f}); |
11fdf7f2 TL |
2468 | } |
2469 | ||
2470 | // Writes a decimal integer. | |
2471 | template <typename Int> | |
2472 | void write_decimal(Int value) { | |
2473 | typedef typename internal::int_traits<Int>::main_type main_type; | |
2474 | main_type abs_value = static_cast<main_type>(value); | |
2475 | bool is_negative = internal::is_negative(value); | |
2476 | if (is_negative) | |
2477 | abs_value = 0 - abs_value; | |
2478 | unsigned num_digits = internal::count_digits(abs_value); | |
2479 | auto &&it = reserve((is_negative ? 1 : 0) + num_digits); | |
2480 | if (is_negative) | |
eafe8130 TL |
2481 | *it++ = static_cast<char_type>('-'); |
2482 | it = internal::format_decimal<char_type>(it, abs_value, num_digits); | |
11fdf7f2 TL |
2483 | } |
2484 | ||
2485 | // The handle_int_type_spec handler that writes an integer. | |
2486 | template <typename Int, typename Spec> | |
2487 | struct int_writer { | |
2488 | typedef typename internal::int_traits<Int>::main_type unsigned_type; | |
2489 | ||
2490 | basic_writer<Range> &writer; | |
2491 | const Spec &spec; | |
2492 | unsigned_type abs_value; | |
2493 | char prefix[4]; | |
2494 | unsigned prefix_size; | |
2495 | ||
2496 | string_view get_prefix() const { return string_view(prefix, prefix_size); } | |
2497 | ||
2498 | // Counts the number of digits in abs_value. BITS = log2(radix). | |
2499 | template <unsigned BITS> | |
2500 | unsigned count_digits() const { | |
2501 | unsigned_type n = abs_value; | |
2502 | unsigned num_digits = 0; | |
2503 | do { | |
2504 | ++num_digits; | |
2505 | } while ((n >>= BITS) != 0); | |
2506 | return num_digits; | |
2507 | } | |
2508 | ||
2509 | int_writer(basic_writer<Range> &w, Int value, const Spec &s) | |
2510 | : writer(w), spec(s), abs_value(static_cast<unsigned_type>(value)), | |
2511 | prefix_size(0) { | |
2512 | if (internal::is_negative(value)) { | |
2513 | prefix[0] = '-'; | |
2514 | ++prefix_size; | |
2515 | abs_value = 0 - abs_value; | |
eafe8130 TL |
2516 | } else if (spec.has(SIGN_FLAG)) { |
2517 | prefix[0] = spec.has(PLUS_FLAG) ? '+' : ' '; | |
11fdf7f2 TL |
2518 | ++prefix_size; |
2519 | } | |
2520 | } | |
2521 | ||
2522 | struct dec_writer { | |
2523 | unsigned_type abs_value; | |
2524 | unsigned num_digits; | |
2525 | ||
2526 | template <typename It> | |
2527 | void operator()(It &&it) const { | |
eafe8130 | 2528 | it = internal::format_decimal<char_type>(it, abs_value, num_digits); |
11fdf7f2 TL |
2529 | } |
2530 | }; | |
2531 | ||
2532 | void on_dec() { | |
2533 | unsigned num_digits = internal::count_digits(abs_value); | |
2534 | writer.write_int(num_digits, get_prefix(), spec, | |
2535 | dec_writer{abs_value, num_digits}); | |
2536 | } | |
2537 | ||
2538 | struct hex_writer { | |
2539 | int_writer &self; | |
2540 | unsigned num_digits; | |
2541 | ||
2542 | template <typename It> | |
2543 | void operator()(It &&it) const { | |
eafe8130 TL |
2544 | it = internal::format_uint<4, char_type>( |
2545 | it, self.abs_value, num_digits, self.spec.type != 'x'); | |
11fdf7f2 TL |
2546 | } |
2547 | }; | |
2548 | ||
2549 | void on_hex() { | |
eafe8130 | 2550 | if (spec.has(HASH_FLAG)) { |
11fdf7f2 | 2551 | prefix[prefix_size++] = '0'; |
eafe8130 | 2552 | prefix[prefix_size++] = static_cast<char>(spec.type); |
11fdf7f2 TL |
2553 | } |
2554 | unsigned num_digits = count_digits<4>(); | |
2555 | writer.write_int(num_digits, get_prefix(), spec, | |
2556 | hex_writer{*this, num_digits}); | |
2557 | } | |
2558 | ||
2559 | template <int BITS> | |
2560 | struct bin_writer { | |
2561 | unsigned_type abs_value; | |
2562 | unsigned num_digits; | |
2563 | ||
2564 | template <typename It> | |
2565 | void operator()(It &&it) const { | |
eafe8130 | 2566 | it = internal::format_uint<BITS, char_type>(it, abs_value, num_digits); |
11fdf7f2 TL |
2567 | } |
2568 | }; | |
2569 | ||
2570 | void on_bin() { | |
eafe8130 | 2571 | if (spec.has(HASH_FLAG)) { |
11fdf7f2 | 2572 | prefix[prefix_size++] = '0'; |
eafe8130 | 2573 | prefix[prefix_size++] = static_cast<char>(spec.type); |
11fdf7f2 TL |
2574 | } |
2575 | unsigned num_digits = count_digits<1>(); | |
2576 | writer.write_int(num_digits, get_prefix(), spec, | |
2577 | bin_writer<1>{abs_value, num_digits}); | |
2578 | } | |
2579 | ||
2580 | void on_oct() { | |
2581 | unsigned num_digits = count_digits<3>(); | |
eafe8130 TL |
2582 | if (spec.has(HASH_FLAG) && |
2583 | spec.precision <= static_cast<int>(num_digits)) { | |
11fdf7f2 TL |
2584 | // Octal prefix '0' is counted as a digit, so only add it if precision |
2585 | // is not greater than the number of digits. | |
2586 | prefix[prefix_size++] = '0'; | |
2587 | } | |
2588 | writer.write_int(num_digits, get_prefix(), spec, | |
2589 | bin_writer<3>{abs_value, num_digits}); | |
2590 | } | |
2591 | ||
2592 | enum { SEP_SIZE = 1 }; | |
2593 | ||
2594 | struct num_writer { | |
2595 | unsigned_type abs_value; | |
2596 | unsigned size; | |
2597 | char_type sep; | |
2598 | ||
2599 | template <typename It> | |
2600 | void operator()(It &&it) const { | |
2601 | basic_string_view<char_type> s(&sep, SEP_SIZE); | |
eafe8130 TL |
2602 | it = internal::format_decimal<char_type>( |
2603 | it, abs_value, size, internal::add_thousands_sep<char_type>(s)); | |
11fdf7f2 TL |
2604 | } |
2605 | }; | |
2606 | ||
2607 | void on_num() { | |
2608 | unsigned num_digits = internal::count_digits(abs_value); | |
eafe8130 | 2609 | char_type sep = internal::thousands_sep<char_type>(writer.locale_); |
11fdf7f2 TL |
2610 | unsigned size = num_digits + SEP_SIZE * ((num_digits - 1) / 3); |
2611 | writer.write_int(size, get_prefix(), spec, | |
2612 | num_writer{abs_value, size, sep}); | |
2613 | } | |
2614 | ||
2615 | void on_error() { | |
2616 | FMT_THROW(format_error("invalid type specifier")); | |
2617 | } | |
2618 | }; | |
2619 | ||
2620 | // Writes a formatted integer. | |
2621 | template <typename T, typename Spec> | |
2622 | void write_int(T value, const Spec &spec) { | |
eafe8130 | 2623 | internal::handle_int_type_spec(spec.type, |
11fdf7f2 TL |
2624 | int_writer<T, Spec>(*this, value, spec)); |
2625 | } | |
2626 | ||
2627 | enum {INF_SIZE = 3}; // This is an enum to workaround a bug in MSVC. | |
2628 | ||
2629 | struct inf_or_nan_writer { | |
2630 | char sign; | |
2631 | const char *str; | |
2632 | ||
eafe8130 TL |
2633 | size_t size() const { |
2634 | return static_cast<std::size_t>(INF_SIZE + (sign ? 1 : 0)); | |
2635 | } | |
2636 | size_t width() const { return size(); } | |
2637 | ||
11fdf7f2 TL |
2638 | template <typename It> |
2639 | void operator()(It &&it) const { | |
2640 | if (sign) | |
eafe8130 TL |
2641 | *it++ = static_cast<char_type>(sign); |
2642 | it = internal::copy_str<char_type>( | |
2643 | str, str + static_cast<std::size_t>(INF_SIZE), it); | |
11fdf7f2 TL |
2644 | } |
2645 | }; | |
2646 | ||
2647 | struct double_writer { | |
2648 | size_t n; | |
2649 | char sign; | |
eafe8130 TL |
2650 | internal::buffer &buffer; |
2651 | ||
2652 | size_t size() const { return buffer.size() + (sign ? 1 : 0); } | |
2653 | size_t width() const { return size(); } | |
11fdf7f2 TL |
2654 | |
2655 | template <typename It> | |
2656 | void operator()(It &&it) { | |
2657 | if (sign) { | |
eafe8130 | 2658 | *it++ = static_cast<char_type>(sign); |
11fdf7f2 TL |
2659 | --n; |
2660 | } | |
eafe8130 | 2661 | it = internal::copy_str<char_type>(buffer.begin(), buffer.end(), it); |
11fdf7f2 TL |
2662 | } |
2663 | }; | |
2664 | ||
2665 | // Formats a floating-point number (double or long double). | |
2666 | template <typename T> | |
2667 | void write_double(T value, const format_specs &spec); | |
11fdf7f2 TL |
2668 | |
2669 | template <typename Char> | |
2670 | struct str_writer { | |
2671 | const Char *s; | |
eafe8130 TL |
2672 | size_t size_; |
2673 | ||
2674 | size_t size() const { return size_; } | |
2675 | size_t width() const { | |
2676 | return internal::count_code_points(basic_string_view<Char>(s, size_)); | |
2677 | } | |
11fdf7f2 TL |
2678 | |
2679 | template <typename It> | |
2680 | void operator()(It &&it) const { | |
eafe8130 | 2681 | it = internal::copy_str<char_type>(s, s + size_, it); |
11fdf7f2 TL |
2682 | } |
2683 | }; | |
2684 | ||
2685 | // Writes a formatted string. | |
2686 | template <typename Char> | |
2687 | void write_str(const Char *s, std::size_t size, const align_spec &spec) { | |
eafe8130 | 2688 | write_padded(spec, str_writer<Char>{s, size}); |
11fdf7f2 TL |
2689 | } |
2690 | ||
2691 | template <typename Char> | |
2692 | void write_str(basic_string_view<Char> str, const format_specs &spec); | |
2693 | ||
11fdf7f2 TL |
2694 | template <typename Char> |
2695 | friend class internal::arg_formatter_base; | |
2696 | ||
2697 | public: | |
2698 | /** Constructs a ``basic_writer`` object. */ | |
eafe8130 TL |
2699 | explicit basic_writer( |
2700 | Range out, internal::locale_ref loc = internal::locale_ref()) | |
2701 | : out_(out.begin()), locale_(loc) {} | |
11fdf7f2 TL |
2702 | |
2703 | void write(int value) { write_decimal(value); } | |
2704 | void write(long value) { write_decimal(value); } | |
2705 | void write(long long value) { write_decimal(value); } | |
2706 | ||
2707 | void write(unsigned value) { write_decimal(value); } | |
2708 | void write(unsigned long value) { write_decimal(value); } | |
2709 | void write(unsigned long long value) { write_decimal(value); } | |
2710 | ||
2711 | /** | |
2712 | \rst | |
2713 | Formats *value* and writes it to the buffer. | |
2714 | \endrst | |
2715 | */ | |
2716 | template <typename T, typename FormatSpec, typename... FormatSpecs> | |
2717 | typename std::enable_if<std::is_integral<T>::value, void>::type | |
2718 | write(T value, FormatSpec spec, FormatSpecs... specs) { | |
2719 | format_specs s(spec, specs...); | |
2720 | s.align_ = ALIGN_RIGHT; | |
2721 | write_int(value, s); | |
2722 | } | |
2723 | ||
2724 | void write(double value) { | |
2725 | write_double(value, format_specs()); | |
2726 | } | |
2727 | ||
2728 | /** | |
2729 | \rst | |
2730 | Formats *value* using the general format for floating-point numbers | |
2731 | (``'g'``) and writes it to the buffer. | |
2732 | \endrst | |
2733 | */ | |
2734 | void write(long double value) { | |
2735 | write_double(value, format_specs()); | |
2736 | } | |
2737 | ||
2738 | /** Writes a character to the buffer. */ | |
2739 | void write(char value) { | |
2740 | *reserve(1) = value; | |
2741 | } | |
11fdf7f2 | 2742 | void write(wchar_t value) { |
eafe8130 | 2743 | static_assert(std::is_same<char_type, wchar_t>::value, ""); |
11fdf7f2 TL |
2744 | *reserve(1) = value; |
2745 | } | |
2746 | ||
2747 | /** | |
2748 | \rst | |
2749 | Writes *value* to the buffer. | |
2750 | \endrst | |
2751 | */ | |
2752 | void write(string_view value) { | |
2753 | auto &&it = reserve(value.size()); | |
eafe8130 | 2754 | it = internal::copy_str<char_type>(value.begin(), value.end(), it); |
11fdf7f2 | 2755 | } |
11fdf7f2 | 2756 | void write(wstring_view value) { |
eafe8130 | 2757 | static_assert(std::is_same<char_type, wchar_t>::value, ""); |
11fdf7f2 TL |
2758 | auto &&it = reserve(value.size()); |
2759 | it = std::copy(value.begin(), value.end(), it); | |
2760 | } | |
2761 | ||
2762 | template <typename... FormatSpecs> | |
2763 | void write(basic_string_view<char_type> str, FormatSpecs... specs) { | |
2764 | write_str(str, format_specs(specs...)); | |
2765 | } | |
2766 | ||
2767 | template <typename T> | |
2768 | typename std::enable_if<std::is_same<T, void>::value>::type | |
2769 | write(const T *p) { | |
2770 | format_specs specs; | |
eafe8130 TL |
2771 | specs.flags = HASH_FLAG; |
2772 | specs.type = 'x'; | |
11fdf7f2 TL |
2773 | write_int(reinterpret_cast<uintptr_t>(p), specs); |
2774 | } | |
2775 | }; | |
2776 | ||
2777 | template <typename Range> | |
2778 | template <typename F> | |
eafe8130 TL |
2779 | void basic_writer<Range>::write_padded(const align_spec &spec, F &&f) { |
2780 | unsigned width = spec.width(); // User-perceived width (in code points). | |
2781 | size_t size = f.size(); // The number of code units. | |
2782 | size_t num_code_points = width != 0 ? f.width() : size; | |
2783 | if (width <= num_code_points) | |
11fdf7f2 | 2784 | return f(reserve(size)); |
eafe8130 | 2785 | auto &&it = reserve(width + (size - num_code_points)); |
11fdf7f2 | 2786 | char_type fill = static_cast<char_type>(spec.fill()); |
eafe8130 | 2787 | std::size_t padding = width - num_code_points; |
11fdf7f2 TL |
2788 | if (spec.align() == ALIGN_RIGHT) { |
2789 | it = std::fill_n(it, padding, fill); | |
2790 | f(it); | |
2791 | } else if (spec.align() == ALIGN_CENTER) { | |
2792 | std::size_t left_padding = padding / 2; | |
2793 | it = std::fill_n(it, left_padding, fill); | |
2794 | f(it); | |
2795 | it = std::fill_n(it, padding - left_padding, fill); | |
2796 | } else { | |
2797 | f(it); | |
2798 | it = std::fill_n(it, padding, fill); | |
2799 | } | |
2800 | } | |
2801 | ||
2802 | template <typename Range> | |
2803 | template <typename Char> | |
2804 | void basic_writer<Range>::write_str( | |
2805 | basic_string_view<Char> s, const format_specs &spec) { | |
2806 | const Char *data = s.data(); | |
2807 | std::size_t size = s.size(); | |
eafe8130 TL |
2808 | if (spec.precision >= 0 && internal::to_unsigned(spec.precision) < size) |
2809 | size = internal::to_unsigned(spec.precision); | |
11fdf7f2 TL |
2810 | write_str(data, size, spec); |
2811 | } | |
2812 | ||
11fdf7f2 | 2813 | struct float_spec_handler { |
eafe8130 | 2814 | char type; |
11fdf7f2 TL |
2815 | bool upper; |
2816 | ||
eafe8130 | 2817 | explicit float_spec_handler(char t) : type(t), upper(false) {} |
11fdf7f2 TL |
2818 | |
2819 | void on_general() { | |
2820 | if (type == 'G') | |
2821 | upper = true; | |
2822 | else | |
2823 | type = 'g'; | |
2824 | } | |
2825 | ||
2826 | void on_exp() { | |
2827 | if (type == 'E') | |
2828 | upper = true; | |
2829 | } | |
2830 | ||
2831 | void on_fixed() { | |
2832 | if (type == 'F') { | |
2833 | upper = true; | |
2834 | #if FMT_MSC_VER | |
2835 | // MSVC's printf doesn't support 'F'. | |
2836 | type = 'f'; | |
2837 | #endif | |
2838 | } | |
2839 | } | |
2840 | ||
2841 | void on_hex() { | |
2842 | if (type == 'A') | |
2843 | upper = true; | |
2844 | } | |
2845 | ||
2846 | void on_error() { | |
2847 | FMT_THROW(format_error("invalid type specifier")); | |
2848 | } | |
2849 | }; | |
2850 | ||
2851 | template <typename Range> | |
2852 | template <typename T> | |
2853 | void basic_writer<Range>::write_double(T value, const format_specs &spec) { | |
2854 | // Check type. | |
eafe8130 TL |
2855 | float_spec_handler handler(static_cast<char>(spec.type)); |
2856 | internal::handle_float_type_spec(handler.type, handler); | |
11fdf7f2 TL |
2857 | |
2858 | char sign = 0; | |
eafe8130 | 2859 | // Use signbit instead of value < 0 because the latter is always |
11fdf7f2 | 2860 | // false for NaN. |
eafe8130 | 2861 | if (std::signbit(value)) { |
11fdf7f2 TL |
2862 | sign = '-'; |
2863 | value = -value; | |
eafe8130 TL |
2864 | } else if (spec.has(SIGN_FLAG)) { |
2865 | sign = spec.has(PLUS_FLAG) ? '+' : ' '; | |
11fdf7f2 TL |
2866 | } |
2867 | ||
2868 | struct write_inf_or_nan_t { | |
2869 | basic_writer &writer; | |
2870 | format_specs spec; | |
2871 | char sign; | |
2872 | void operator()(const char *str) const { | |
eafe8130 | 2873 | writer.write_padded(spec, inf_or_nan_writer{sign, str}); |
11fdf7f2 TL |
2874 | } |
2875 | } write_inf_or_nan = {*this, spec, sign}; | |
2876 | ||
2877 | // Format NaN and ininity ourselves because sprintf's output is not consistent | |
2878 | // across platforms. | |
2879 | if (internal::fputil::isnotanumber(value)) | |
2880 | return write_inf_or_nan(handler.upper ? "NAN" : "nan"); | |
2881 | if (internal::fputil::isinfinity(value)) | |
2882 | return write_inf_or_nan(handler.upper ? "INF" : "inf"); | |
2883 | ||
eafe8130 TL |
2884 | memory_buffer buffer; |
2885 | bool use_grisu = FMT_USE_GRISU && sizeof(T) <= sizeof(double) && | |
2886 | spec.type != 'a' && spec.type != 'A' && | |
2887 | internal::grisu2_format(static_cast<double>(value), buffer, spec); | |
2888 | if (!use_grisu) { | |
11fdf7f2 | 2889 | format_specs normalized_spec(spec); |
eafe8130 TL |
2890 | normalized_spec.type = handler.type; |
2891 | internal::sprintf_format(value, buffer, normalized_spec); | |
11fdf7f2 TL |
2892 | } |
2893 | size_t n = buffer.size(); | |
2894 | align_spec as = spec; | |
2895 | if (spec.align() == ALIGN_NUMERIC) { | |
2896 | if (sign) { | |
2897 | auto &&it = reserve(1); | |
eafe8130 | 2898 | *it++ = static_cast<char_type>(sign); |
11fdf7f2 TL |
2899 | sign = 0; |
2900 | if (as.width_) | |
2901 | --as.width_; | |
2902 | } | |
2903 | as.align_ = ALIGN_RIGHT; | |
2904 | } else { | |
2905 | if (spec.align() == ALIGN_DEFAULT) | |
2906 | as.align_ = ALIGN_RIGHT; | |
2907 | if (sign) | |
2908 | ++n; | |
2909 | } | |
eafe8130 | 2910 | write_padded(as, double_writer{n, sign, buffer}); |
11fdf7f2 TL |
2911 | } |
2912 | ||
2913 | // Reports a system error without throwing an exception. | |
2914 | // Can be used to report errors from destructors. | |
2915 | FMT_API void report_system_error(int error_code, | |
2916 | string_view message) FMT_NOEXCEPT; | |
2917 | ||
2918 | #if FMT_USE_WINDOWS_H | |
2919 | ||
2920 | /** A Windows error. */ | |
2921 | class windows_error : public system_error { | |
2922 | private: | |
2923 | FMT_API void init(int error_code, string_view format_str, format_args args); | |
2924 | ||
2925 | public: | |
2926 | /** | |
2927 | \rst | |
2928 | Constructs a :class:`fmt::windows_error` object with the description | |
2929 | of the form | |
2930 | ||
2931 | .. parsed-literal:: | |
2932 | *<message>*: *<system-message>* | |
2933 | ||
2934 | where *<message>* is the formatted message and *<system-message>* is the | |
2935 | system message corresponding to the error code. | |
2936 | *error_code* is a Windows error code as given by ``GetLastError``. | |
2937 | If *error_code* is not a valid error code such as -1, the system message | |
2938 | will look like "error -1". | |
2939 | ||
2940 | **Example**:: | |
2941 | ||
2942 | // This throws a windows_error with the description | |
2943 | // cannot open file 'madeup': The system cannot find the file specified. | |
2944 | // or similar (system message may vary). | |
2945 | const char *filename = "madeup"; | |
2946 | LPOFSTRUCT of = LPOFSTRUCT(); | |
2947 | HFILE file = OpenFile(filename, &of, OF_READ); | |
2948 | if (file == HFILE_ERROR) { | |
2949 | throw fmt::windows_error(GetLastError(), | |
2950 | "cannot open file '{}'", filename); | |
2951 | } | |
2952 | \endrst | |
2953 | */ | |
2954 | template <typename... Args> | |
eafe8130 | 2955 | windows_error(int error_code, string_view message, const Args &... args) { |
11fdf7f2 TL |
2956 | init(error_code, message, make_format_args(args...)); |
2957 | } | |
2958 | }; | |
2959 | ||
2960 | // Reports a Windows error without throwing an exception. | |
2961 | // Can be used to report errors from destructors. | |
2962 | FMT_API void report_windows_error(int error_code, | |
2963 | string_view message) FMT_NOEXCEPT; | |
2964 | ||
2965 | #endif | |
2966 | ||
2967 | /** Fast integer formatter. */ | |
2968 | class format_int { | |
2969 | private: | |
2970 | // Buffer should be large enough to hold all digits (digits10 + 1), | |
2971 | // a sign and a null character. | |
2972 | enum {BUFFER_SIZE = std::numeric_limits<unsigned long long>::digits10 + 3}; | |
2973 | mutable char buffer_[BUFFER_SIZE]; | |
2974 | char *str_; | |
2975 | ||
2976 | // Formats value in reverse and returns a pointer to the beginning. | |
2977 | char *format_decimal(unsigned long long value) { | |
eafe8130 | 2978 | char *ptr = buffer_ + (BUFFER_SIZE - 1); // Parens to workaround MSVC bug. |
11fdf7f2 TL |
2979 | while (value >= 100) { |
2980 | // Integer division is slow so do it for a group of two digits instead | |
2981 | // of for every digit. The idea comes from the talk by Alexandrescu | |
2982 | // "Three Optimization Tips for C++". See speed-test for a comparison. | |
2983 | unsigned index = static_cast<unsigned>((value % 100) * 2); | |
2984 | value /= 100; | |
2985 | *--ptr = internal::data::DIGITS[index + 1]; | |
2986 | *--ptr = internal::data::DIGITS[index]; | |
2987 | } | |
2988 | if (value < 10) { | |
2989 | *--ptr = static_cast<char>('0' + value); | |
2990 | return ptr; | |
2991 | } | |
2992 | unsigned index = static_cast<unsigned>(value * 2); | |
2993 | *--ptr = internal::data::DIGITS[index + 1]; | |
2994 | *--ptr = internal::data::DIGITS[index]; | |
2995 | return ptr; | |
2996 | } | |
2997 | ||
2998 | void format_signed(long long value) { | |
2999 | unsigned long long abs_value = static_cast<unsigned long long>(value); | |
3000 | bool negative = value < 0; | |
3001 | if (negative) | |
3002 | abs_value = 0 - abs_value; | |
3003 | str_ = format_decimal(abs_value); | |
3004 | if (negative) | |
3005 | *--str_ = '-'; | |
3006 | } | |
3007 | ||
3008 | public: | |
3009 | explicit format_int(int value) { format_signed(value); } | |
3010 | explicit format_int(long value) { format_signed(value); } | |
3011 | explicit format_int(long long value) { format_signed(value); } | |
3012 | explicit format_int(unsigned value) : str_(format_decimal(value)) {} | |
3013 | explicit format_int(unsigned long value) : str_(format_decimal(value)) {} | |
3014 | explicit format_int(unsigned long long value) : str_(format_decimal(value)) {} | |
3015 | ||
3016 | /** Returns the number of characters written to the output buffer. */ | |
3017 | std::size_t size() const { | |
3018 | return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1); | |
3019 | } | |
3020 | ||
3021 | /** | |
3022 | Returns a pointer to the output buffer content. No terminating null | |
3023 | character is appended. | |
3024 | */ | |
3025 | const char *data() const { return str_; } | |
3026 | ||
3027 | /** | |
3028 | Returns a pointer to the output buffer content with terminating null | |
3029 | character appended. | |
3030 | */ | |
3031 | const char *c_str() const { | |
3032 | buffer_[BUFFER_SIZE - 1] = '\0'; | |
3033 | return str_; | |
3034 | } | |
3035 | ||
3036 | /** | |
3037 | \rst | |
3038 | Returns the content of the output buffer as an ``std::string``. | |
3039 | \endrst | |
3040 | */ | |
3041 | std::string str() const { return std::string(str_, size()); } | |
3042 | }; | |
3043 | ||
eafe8130 | 3044 | // DEPRECATED! |
11fdf7f2 TL |
3045 | // Formats a decimal integer value writing into buffer and returns |
3046 | // a pointer to the end of the formatted string. This function doesn't | |
3047 | // write a terminating null character. | |
3048 | template <typename T> | |
3049 | inline void format_decimal(char *&buffer, T value) { | |
3050 | typedef typename internal::int_traits<T>::main_type main_type; | |
3051 | main_type abs_value = static_cast<main_type>(value); | |
3052 | if (internal::is_negative(value)) { | |
3053 | *buffer++ = '-'; | |
3054 | abs_value = 0 - abs_value; | |
3055 | } | |
3056 | if (abs_value < 100) { | |
3057 | if (abs_value < 10) { | |
3058 | *buffer++ = static_cast<char>('0' + abs_value); | |
3059 | return; | |
3060 | } | |
3061 | unsigned index = static_cast<unsigned>(abs_value * 2); | |
3062 | *buffer++ = internal::data::DIGITS[index]; | |
3063 | *buffer++ = internal::data::DIGITS[index + 1]; | |
3064 | return; | |
3065 | } | |
3066 | unsigned num_digits = internal::count_digits(abs_value); | |
eafe8130 TL |
3067 | internal::format_decimal<char>( |
3068 | internal::make_checked(buffer, num_digits), abs_value, num_digits); | |
11fdf7f2 TL |
3069 | buffer += num_digits; |
3070 | } | |
3071 | ||
3072 | // Formatter of objects of type T. | |
3073 | template <typename T, typename Char> | |
3074 | struct formatter< | |
3075 | T, Char, | |
3076 | typename std::enable_if<internal::format_type< | |
3077 | typename buffer_context<Char>::type, T>::value>::type> { | |
3078 | ||
3079 | // Parses format specifiers stopping either at the end of the range or at the | |
3080 | // terminating '}'. | |
3081 | template <typename ParseContext> | |
3082 | FMT_CONSTEXPR typename ParseContext::iterator parse(ParseContext &ctx) { | |
3083 | auto it = internal::null_terminating_iterator<Char>(ctx); | |
3084 | typedef internal::dynamic_specs_handler<ParseContext> handler_type; | |
3085 | auto type = internal::get_type< | |
3086 | typename buffer_context<Char>::type, T>::value; | |
3087 | internal::specs_checker<handler_type> | |
3088 | handler(handler_type(specs_, ctx), type); | |
3089 | it = parse_format_specs(it, handler); | |
eafe8130 | 3090 | auto type_spec = specs_.type; |
11fdf7f2 TL |
3091 | auto eh = ctx.error_handler(); |
3092 | switch (type) { | |
3093 | case internal::none_type: | |
3094 | case internal::named_arg_type: | |
3095 | FMT_ASSERT(false, "invalid argument type"); | |
3096 | break; | |
3097 | case internal::int_type: | |
3098 | case internal::uint_type: | |
3099 | case internal::long_long_type: | |
3100 | case internal::ulong_long_type: | |
3101 | case internal::bool_type: | |
3102 | handle_int_type_spec( | |
3103 | type_spec, internal::int_type_checker<decltype(eh)>(eh)); | |
3104 | break; | |
3105 | case internal::char_type: | |
3106 | handle_char_specs( | |
3107 | &specs_, | |
eafe8130 | 3108 | internal::char_specs_checker<decltype(eh)>(type_spec, eh)); |
11fdf7f2 TL |
3109 | break; |
3110 | case internal::double_type: | |
3111 | case internal::long_double_type: | |
3112 | handle_float_type_spec( | |
3113 | type_spec, internal::float_type_checker<decltype(eh)>(eh)); | |
3114 | break; | |
3115 | case internal::cstring_type: | |
3116 | internal::handle_cstring_type_spec( | |
3117 | type_spec, internal::cstring_type_checker<decltype(eh)>(eh)); | |
3118 | break; | |
3119 | case internal::string_type: | |
3120 | internal::check_string_type_spec(type_spec, eh); | |
3121 | break; | |
3122 | case internal::pointer_type: | |
3123 | internal::check_pointer_type_spec(type_spec, eh); | |
3124 | break; | |
3125 | case internal::custom_type: | |
3126 | // Custom format specifiers should be checked in parse functions of | |
3127 | // formatter specializations. | |
3128 | break; | |
3129 | } | |
3130 | return pointer_from(it); | |
3131 | } | |
3132 | ||
3133 | template <typename FormatContext> | |
3134 | auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) { | |
3135 | internal::handle_dynamic_spec<internal::width_checker>( | |
3136 | specs_.width_, specs_.width_ref, ctx); | |
3137 | internal::handle_dynamic_spec<internal::precision_checker>( | |
eafe8130 | 3138 | specs_.precision, specs_.precision_ref, ctx); |
11fdf7f2 TL |
3139 | typedef output_range<typename FormatContext::iterator, |
3140 | typename FormatContext::char_type> range_type; | |
eafe8130 | 3141 | return visit_format_arg(arg_formatter<range_type>(ctx, &specs_), |
11fdf7f2 TL |
3142 | internal::make_arg<FormatContext>(val)); |
3143 | } | |
3144 | ||
3145 | private: | |
3146 | internal::dynamic_format_specs<Char> specs_; | |
3147 | }; | |
3148 | ||
3149 | // A formatter for types known only at run time such as variant alternatives. | |
3150 | // | |
3151 | // Usage: | |
3152 | // typedef std::variant<int, std::string> variant; | |
3153 | // template <> | |
3154 | // struct formatter<variant>: dynamic_formatter<> { | |
3155 | // void format(buffer &buf, const variant &v, context &ctx) { | |
3156 | // visit([&](const auto &val) { format(buf, val, ctx); }, v); | |
3157 | // } | |
3158 | // }; | |
3159 | template <typename Char = char> | |
3160 | class dynamic_formatter { | |
3161 | private: | |
3162 | struct null_handler: internal::error_handler { | |
3163 | void on_align(alignment) {} | |
3164 | void on_plus() {} | |
3165 | void on_minus() {} | |
3166 | void on_space() {} | |
3167 | void on_hash() {} | |
3168 | }; | |
3169 | ||
3170 | public: | |
3171 | template <typename ParseContext> | |
3172 | auto parse(ParseContext &ctx) -> decltype(ctx.begin()) { | |
3173 | auto it = internal::null_terminating_iterator<Char>(ctx); | |
3174 | // Checks are deferred to formatting time when the argument type is known. | |
3175 | internal::dynamic_specs_handler<ParseContext> handler(specs_, ctx); | |
3176 | it = parse_format_specs(it, handler); | |
3177 | return pointer_from(it); | |
3178 | } | |
3179 | ||
3180 | template <typename T, typename FormatContext> | |
3181 | auto format(const T &val, FormatContext &ctx) -> decltype(ctx.out()) { | |
3182 | handle_specs(ctx); | |
3183 | internal::specs_checker<null_handler> | |
3184 | checker(null_handler(), internal::get_type<FormatContext, T>::value); | |
3185 | checker.on_align(specs_.align()); | |
eafe8130 TL |
3186 | if (specs_.flags == 0); // Do nothing. |
3187 | else if (specs_.has(SIGN_FLAG)) | |
3188 | specs_.has(PLUS_FLAG) ? checker.on_plus() : checker.on_space(); | |
3189 | else if (specs_.has(MINUS_FLAG)) | |
11fdf7f2 | 3190 | checker.on_minus(); |
eafe8130 | 3191 | else if (specs_.has(HASH_FLAG)) |
11fdf7f2 | 3192 | checker.on_hash(); |
eafe8130 | 3193 | if (specs_.precision != -1) |
11fdf7f2 TL |
3194 | checker.end_precision(); |
3195 | typedef output_range<typename FormatContext::iterator, | |
3196 | typename FormatContext::char_type> range; | |
eafe8130 | 3197 | visit_format_arg(arg_formatter<range>(ctx, &specs_), |
11fdf7f2 TL |
3198 | internal::make_arg<FormatContext>(val)); |
3199 | return ctx.out(); | |
3200 | } | |
3201 | ||
3202 | private: | |
3203 | template <typename Context> | |
3204 | void handle_specs(Context &ctx) { | |
3205 | internal::handle_dynamic_spec<internal::width_checker>( | |
3206 | specs_.width_, specs_.width_ref, ctx); | |
3207 | internal::handle_dynamic_spec<internal::precision_checker>( | |
eafe8130 | 3208 | specs_.precision, specs_.precision_ref, ctx); |
11fdf7f2 TL |
3209 | } |
3210 | ||
3211 | internal::dynamic_format_specs<Char> specs_; | |
3212 | }; | |
3213 | ||
3214 | template <typename Range, typename Char> | |
3215 | typename basic_format_context<Range, Char>::format_arg | |
3216 | basic_format_context<Range, Char>::get_arg( | |
3217 | basic_string_view<char_type> name) { | |
3218 | map_.init(this->args()); | |
3219 | format_arg arg = map_.find(name); | |
3220 | if (arg.type() == internal::none_type) | |
3221 | this->on_error("argument not found"); | |
3222 | return arg; | |
3223 | } | |
3224 | ||
3225 | template <typename ArgFormatter, typename Char, typename Context> | |
3226 | struct format_handler : internal::error_handler { | |
3227 | typedef internal::null_terminating_iterator<Char> iterator; | |
3228 | typedef typename ArgFormatter::range range; | |
3229 | ||
3230 | format_handler(range r, basic_string_view<Char> str, | |
eafe8130 TL |
3231 | basic_format_args<Context> format_args, |
3232 | internal::locale_ref loc) | |
3233 | : context(r.begin(), str, format_args, loc) {} | |
11fdf7f2 TL |
3234 | |
3235 | void on_text(const Char *begin, const Char *end) { | |
3236 | auto size = internal::to_unsigned(end - begin); | |
3237 | auto out = context.out(); | |
3238 | auto &&it = internal::reserve(out, size); | |
3239 | it = std::copy_n(begin, size, it); | |
3240 | context.advance_to(out); | |
3241 | } | |
3242 | ||
3243 | void on_arg_id() { arg = context.next_arg(); } | |
3244 | void on_arg_id(unsigned id) { | |
3245 | context.parse_context().check_arg_id(id); | |
3246 | arg = context.get_arg(id); | |
3247 | } | |
3248 | void on_arg_id(basic_string_view<Char> id) { | |
3249 | arg = context.get_arg(id); | |
3250 | } | |
3251 | ||
3252 | void on_replacement_field(const Char *p) { | |
3253 | context.parse_context().advance_to(p); | |
eafe8130 TL |
3254 | internal::custom_formatter<Char, Context> f(context); |
3255 | if (!visit_format_arg(f, arg)) | |
3256 | context.advance_to(visit_format_arg(ArgFormatter(context), arg)); | |
11fdf7f2 TL |
3257 | } |
3258 | ||
3259 | iterator on_format_specs(iterator it) { | |
eafe8130 | 3260 | auto &parse_ctx = context.parse_context(); |
11fdf7f2 | 3261 | parse_ctx.advance_to(pointer_from(it)); |
eafe8130 TL |
3262 | internal::custom_formatter<Char, Context> f(context); |
3263 | if (visit_format_arg(f, arg)) | |
11fdf7f2 TL |
3264 | return iterator(parse_ctx); |
3265 | basic_format_specs<Char> specs; | |
3266 | using internal::specs_handler; | |
3267 | internal::specs_checker<specs_handler<Context>> | |
3268 | handler(specs_handler<Context>(specs, context), arg.type()); | |
3269 | it = parse_format_specs(it, handler); | |
3270 | if (*it != '}') | |
3271 | on_error("missing '}' in format string"); | |
3272 | parse_ctx.advance_to(pointer_from(it)); | |
eafe8130 | 3273 | context.advance_to(visit_format_arg(ArgFormatter(context, &specs), arg)); |
11fdf7f2 TL |
3274 | return it; |
3275 | } | |
3276 | ||
3277 | Context context; | |
3278 | basic_format_arg<Context> arg; | |
3279 | }; | |
3280 | ||
3281 | /** Formats arguments and writes the output to the range. */ | |
3282 | template <typename ArgFormatter, typename Char, typename Context> | |
eafe8130 TL |
3283 | typename Context::iterator vformat_to( |
3284 | typename ArgFormatter::range out, | |
3285 | basic_string_view<Char> format_str, | |
3286 | basic_format_args<Context> args, | |
3287 | internal::locale_ref loc = internal::locale_ref()) { | |
3288 | format_handler<ArgFormatter, Char, Context> h(out, format_str, args, loc); | |
11fdf7f2 TL |
3289 | internal::parse_format_string<false>(format_str, h); |
3290 | return h.context.out(); | |
3291 | } | |
3292 | ||
3293 | // Casts ``p`` to ``const void*`` for pointer formatting. | |
3294 | // Example: | |
3295 | // auto s = format("{}", ptr(p)); | |
3296 | template <typename T> | |
3297 | inline const void *ptr(const T *p) { return p; } | |
3298 | ||
3299 | template <typename It, typename Char> | |
3300 | struct arg_join { | |
3301 | It begin; | |
3302 | It end; | |
3303 | basic_string_view<Char> sep; | |
3304 | ||
3305 | arg_join(It begin, It end, basic_string_view<Char> sep) | |
3306 | : begin(begin), end(end), sep(sep) {} | |
3307 | }; | |
3308 | ||
3309 | template <typename It, typename Char> | |
3310 | struct formatter<arg_join<It, Char>, Char>: | |
3311 | formatter<typename std::iterator_traits<It>::value_type, Char> { | |
3312 | template <typename FormatContext> | |
3313 | auto format(const arg_join<It, Char> &value, FormatContext &ctx) | |
3314 | -> decltype(ctx.out()) { | |
3315 | typedef formatter<typename std::iterator_traits<It>::value_type, Char> base; | |
3316 | auto it = value.begin; | |
3317 | auto out = ctx.out(); | |
3318 | if (it != value.end) { | |
3319 | out = base::format(*it++, ctx); | |
3320 | while (it != value.end) { | |
3321 | out = std::copy(value.sep.begin(), value.sep.end(), out); | |
3322 | ctx.advance_to(out); | |
3323 | out = base::format(*it++, ctx); | |
3324 | } | |
3325 | } | |
3326 | return out; | |
3327 | } | |
3328 | }; | |
3329 | ||
3330 | template <typename It> | |
3331 | arg_join<It, char> join(It begin, It end, string_view sep) { | |
3332 | return arg_join<It, char>(begin, end, sep); | |
3333 | } | |
3334 | ||
3335 | template <typename It> | |
3336 | arg_join<It, wchar_t> join(It begin, It end, wstring_view sep) { | |
3337 | return arg_join<It, wchar_t>(begin, end, sep); | |
3338 | } | |
3339 | ||
3340 | // The following causes ICE in gcc 4.4. | |
3341 | #if FMT_USE_TRAILING_RETURN && (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 405) | |
3342 | template <typename Range> | |
3343 | auto join(const Range &range, string_view sep) | |
3344 | -> arg_join<decltype(internal::begin(range)), char> { | |
3345 | return join(internal::begin(range), internal::end(range), sep); | |
3346 | } | |
3347 | ||
3348 | template <typename Range> | |
3349 | auto join(const Range &range, wstring_view sep) | |
3350 | -> arg_join<decltype(internal::begin(range)), wchar_t> { | |
3351 | return join(internal::begin(range), internal::end(range), sep); | |
3352 | } | |
3353 | #endif | |
3354 | ||
3355 | /** | |
3356 | \rst | |
3357 | Converts *value* to ``std::string`` using the default format for type *T*. | |
3358 | It doesn't support user-defined types with custom formatters. | |
3359 | ||
3360 | **Example**:: | |
3361 | ||
3362 | #include <fmt/format.h> | |
3363 | ||
3364 | std::string answer = fmt::to_string(42); | |
3365 | \endrst | |
3366 | */ | |
3367 | template <typename T> | |
3368 | std::string to_string(const T &value) { | |
3369 | std::string str; | |
3370 | internal::container_buffer<std::string> buf(str); | |
3371 | writer(buf).write(value); | |
3372 | return str; | |
3373 | } | |
3374 | ||
3375 | /** | |
3376 | Converts *value* to ``std::wstring`` using the default format for type *T*. | |
3377 | */ | |
3378 | template <typename T> | |
3379 | std::wstring to_wstring(const T &value) { | |
3380 | std::wstring str; | |
3381 | internal::container_buffer<std::wstring> buf(str); | |
3382 | wwriter(buf).write(value); | |
3383 | return str; | |
3384 | } | |
3385 | ||
3386 | template <typename Char, std::size_t SIZE> | |
3387 | std::basic_string<Char> to_string(const basic_memory_buffer<Char, SIZE> &buf) { | |
3388 | return std::basic_string<Char>(buf.data(), buf.size()); | |
3389 | } | |
3390 | ||
eafe8130 TL |
3391 | template <typename Char> |
3392 | typename buffer_context<Char>::type::iterator internal::vformat_to( | |
3393 | internal::basic_buffer<Char> &buf, basic_string_view<Char> format_str, | |
3394 | basic_format_args<typename buffer_context<Char>::type> args) { | |
3395 | typedef back_insert_range<internal::basic_buffer<Char> > range; | |
3396 | return vformat_to<arg_formatter<range>>( | |
3397 | buf, to_string_view(format_str), args); | |
11fdf7f2 TL |
3398 | } |
3399 | ||
eafe8130 TL |
3400 | template <typename S, typename Char = FMT_CHAR(S)> |
3401 | inline typename buffer_context<Char>::type::iterator vformat_to( | |
3402 | internal::basic_buffer<Char> &buf, const S &format_str, | |
3403 | basic_format_args<typename buffer_context<Char>::type> args) { | |
3404 | return internal::vformat_to(buf, to_string_view(format_str), args); | |
11fdf7f2 TL |
3405 | } |
3406 | ||
3407 | template < | |
eafe8130 | 3408 | typename S, typename... Args, |
11fdf7f2 | 3409 | std::size_t SIZE = inline_buffer_size, |
eafe8130 | 3410 | typename Char = typename internal::char_t<S>::type> |
11fdf7f2 | 3411 | inline typename buffer_context<Char>::type::iterator format_to( |
eafe8130 TL |
3412 | basic_memory_buffer<Char, SIZE> &buf, const S &format_str, |
3413 | const Args &... args) { | |
11fdf7f2 | 3414 | internal::check_format_string<Args...>(format_str); |
eafe8130 TL |
3415 | typedef typename buffer_context<Char>::type context; |
3416 | format_arg_store<context, Args...> as{args...}; | |
3417 | return internal::vformat_to(buf, to_string_view(format_str), | |
3418 | basic_format_args<context>(as)); | |
11fdf7f2 TL |
3419 | } |
3420 | ||
eafe8130 TL |
3421 | namespace internal { |
3422 | ||
3423 | // Detect the iterator category of *any* given type in a SFINAE-friendly way. | |
3424 | // Unfortunately, older implementations of std::iterator_traits are not safe | |
3425 | // for use in a SFINAE-context. | |
3426 | ||
3427 | // the gist of C++17's void_t magic | |
3428 | template<typename... Ts> | |
3429 | struct void_ { typedef void type; }; | |
3430 | ||
3431 | template <typename T, typename Enable = void> | |
3432 | struct it_category : std::false_type {}; | |
3433 | ||
3434 | template <typename T> | |
3435 | struct it_category<T*> { typedef std::random_access_iterator_tag type; }; | |
3436 | ||
3437 | template <typename T> | |
3438 | struct it_category<T, typename void_<typename T::iterator_category>::type> { | |
3439 | typedef typename T::iterator_category type; | |
3440 | }; | |
3441 | ||
3442 | // Detect if *any* given type models the OutputIterator concept. | |
3443 | template <typename It> | |
3444 | class is_output_iterator { | |
3445 | // Check for mutability because all iterator categories derived from | |
3446 | // std::input_iterator_tag *may* also meet the requirements of an | |
3447 | // OutputIterator, thereby falling into the category of 'mutable iterators' | |
3448 | // [iterator.requirements.general] clause 4. | |
3449 | // The compiler reveals this property only at the point of *actually | |
3450 | // dereferencing* the iterator! | |
3451 | template <typename U> | |
3452 | static decltype(*(internal::declval<U>())) test(std::input_iterator_tag); | |
3453 | template <typename U> | |
3454 | static char& test(std::output_iterator_tag); | |
3455 | template <typename U> | |
3456 | static const char& test(...); | |
3457 | ||
3458 | typedef decltype(test<It>(typename it_category<It>::type{})) type; | |
3459 | typedef typename std::remove_reference<type>::type result; | |
3460 | public: | |
3461 | static const bool value = !std::is_const<result>::value; | |
3462 | }; | |
3463 | } // internal | |
3464 | ||
11fdf7f2 TL |
3465 | template <typename OutputIt, typename Char = char> |
3466 | //using format_context_t = basic_format_context<OutputIt, Char>; | |
3467 | struct format_context_t { typedef basic_format_context<OutputIt, Char> type; }; | |
3468 | ||
3469 | template <typename OutputIt, typename Char = char> | |
3470 | //using format_args_t = basic_format_args<format_context_t<OutputIt, Char>>; | |
3471 | struct format_args_t { | |
3472 | typedef basic_format_args< | |
3473 | typename format_context_t<OutputIt, Char>::type> type; | |
3474 | }; | |
3475 | ||
eafe8130 TL |
3476 | template <typename String, typename OutputIt, typename... Args> |
3477 | inline typename std::enable_if<internal::is_output_iterator<OutputIt>::value, | |
3478 | OutputIt>::type | |
3479 | vformat_to(OutputIt out, const String &format_str, | |
3480 | typename format_args_t<OutputIt, FMT_CHAR(String)>::type args) { | |
3481 | typedef output_range<OutputIt, FMT_CHAR(String)> range; | |
3482 | return vformat_to<arg_formatter<range>>(range(out), | |
3483 | to_string_view(format_str), args); | |
11fdf7f2 TL |
3484 | } |
3485 | ||
3486 | /** | |
3487 | \rst | |
3488 | Formats arguments, writes the result to the output iterator ``out`` and returns | |
3489 | the iterator past the end of the output range. | |
3490 | ||
3491 | **Example**:: | |
3492 | ||
3493 | std::vector<char> out; | |
3494 | fmt::format_to(std::back_inserter(out), "{}", 42); | |
3495 | \endrst | |
3496 | */ | |
eafe8130 TL |
3497 | template <typename OutputIt, typename S, typename... Args> |
3498 | inline typename std::enable_if< | |
3499 | internal::is_string<S>::value && | |
3500 | internal::is_output_iterator<OutputIt>::value, OutputIt>::type | |
3501 | format_to(OutputIt out, const S &format_str, const Args &... args) { | |
3502 | internal::check_format_string<Args...>(format_str); | |
3503 | typedef typename format_context_t<OutputIt, FMT_CHAR(S)>::type context; | |
3504 | format_arg_store<context, Args...> as{args...}; | |
3505 | return vformat_to(out, to_string_view(format_str), | |
3506 | basic_format_args<context>(as)); | |
11fdf7f2 TL |
3507 | } |
3508 | ||
3509 | template <typename OutputIt> | |
3510 | struct format_to_n_result { | |
3511 | /** Iterator past the end of the output range. */ | |
3512 | OutputIt out; | |
3513 | /** Total (not truncated) output size. */ | |
3514 | std::size_t size; | |
3515 | }; | |
3516 | ||
eafe8130 TL |
3517 | template <typename OutputIt, typename Char = typename OutputIt::value_type> |
3518 | struct format_to_n_context : | |
3519 | format_context_t<fmt::internal::truncating_iterator<OutputIt>, Char> {}; | |
11fdf7f2 | 3520 | |
eafe8130 TL |
3521 | template <typename OutputIt, typename Char = typename OutputIt::value_type> |
3522 | struct format_to_n_args { | |
3523 | typedef basic_format_args< | |
3524 | typename format_to_n_context<OutputIt, Char>::type> type; | |
3525 | }; | |
11fdf7f2 | 3526 | |
eafe8130 TL |
3527 | template <typename OutputIt, typename Char, typename ...Args> |
3528 | inline format_arg_store< | |
3529 | typename format_to_n_context<OutputIt, Char>::type, Args...> | |
3530 | make_format_to_n_args(const Args &... args) { | |
3531 | return format_arg_store< | |
3532 | typename format_to_n_context<OutputIt, Char>::type, Args...>(args...); | |
11fdf7f2 TL |
3533 | } |
3534 | ||
eafe8130 TL |
3535 | template <typename OutputIt, typename Char, typename... Args> |
3536 | inline typename std::enable_if< | |
3537 | internal::is_output_iterator<OutputIt>::value, | |
3538 | format_to_n_result<OutputIt>>::type vformat_to_n( | |
3539 | OutputIt out, std::size_t n, basic_string_view<Char> format_str, | |
3540 | typename format_to_n_args<OutputIt, Char>::type args) { | |
11fdf7f2 TL |
3541 | typedef internal::truncating_iterator<OutputIt> It; |
3542 | auto it = vformat_to(It(out, n), format_str, args); | |
3543 | return {it.base(), it.count()}; | |
3544 | } | |
3545 | ||
3546 | /** | |
3547 | \rst | |
3548 | Formats arguments, writes up to ``n`` characters of the result to the output | |
3549 | iterator ``out`` and returns the total output size and the iterator past the | |
3550 | end of the output range. | |
3551 | \endrst | |
3552 | */ | |
eafe8130 TL |
3553 | template <typename OutputIt, typename S, typename... Args> |
3554 | inline typename std::enable_if< | |
3555 | internal::is_string<S>::value && | |
3556 | internal::is_output_iterator<OutputIt>::value, | |
3557 | format_to_n_result<OutputIt>>::type | |
3558 | format_to_n(OutputIt out, std::size_t n, const S &format_str, | |
3559 | const Args &... args) { | |
3560 | internal::check_format_string<Args...>(format_str); | |
3561 | typedef FMT_CHAR(S) Char; | |
3562 | format_arg_store< | |
3563 | typename format_to_n_context<OutputIt, Char>::type, Args...> as(args...); | |
3564 | return vformat_to_n(out, n, to_string_view(format_str), | |
3565 | typename format_to_n_args<OutputIt, Char>::type(as)); | |
11fdf7f2 TL |
3566 | } |
3567 | ||
3568 | template <typename Char> | |
3569 | inline std::basic_string<Char> internal::vformat( | |
3570 | basic_string_view<Char> format_str, | |
3571 | basic_format_args<typename buffer_context<Char>::type> args) { | |
3572 | basic_memory_buffer<Char> buffer; | |
eafe8130 | 3573 | internal::vformat_to(buffer, format_str, args); |
11fdf7f2 TL |
3574 | return fmt::to_string(buffer); |
3575 | } | |
3576 | ||
11fdf7f2 TL |
3577 | /** |
3578 | Returns the number of characters in the output of | |
3579 | ``format(format_str, args...)``. | |
3580 | */ | |
3581 | template <typename... Args> | |
3582 | inline std::size_t formatted_size(string_view format_str, | |
eafe8130 | 3583 | const Args &... args) { |
11fdf7f2 TL |
3584 | auto it = format_to(internal::counting_iterator<char>(), format_str, args...); |
3585 | return it.count(); | |
3586 | } | |
3587 | ||
3588 | #if FMT_USE_USER_DEFINED_LITERALS | |
3589 | namespace internal { | |
3590 | ||
3591 | # if FMT_UDL_TEMPLATE | |
3592 | template <typename Char, Char... CHARS> | |
3593 | class udl_formatter { | |
3594 | public: | |
3595 | template <typename... Args> | |
3596 | std::basic_string<Char> operator()(const Args &... args) const { | |
3597 | FMT_CONSTEXPR_DECL Char s[] = {CHARS..., '\0'}; | |
3598 | FMT_CONSTEXPR_DECL bool invalid_format = | |
eafe8130 | 3599 | do_check_format_string<Char, error_handler, Args...>( |
11fdf7f2 TL |
3600 | basic_string_view<Char>(s, sizeof...(CHARS))); |
3601 | (void)invalid_format; | |
3602 | return format(s, args...); | |
3603 | } | |
3604 | }; | |
3605 | # else | |
3606 | template <typename Char> | |
3607 | struct udl_formatter { | |
3608 | const Char *str; | |
3609 | ||
3610 | template <typename... Args> | |
eafe8130 | 3611 | auto operator()(Args &&... args) const |
11fdf7f2 TL |
3612 | -> decltype(format(str, std::forward<Args>(args)...)) { |
3613 | return format(str, std::forward<Args>(args)...); | |
3614 | } | |
3615 | }; | |
3616 | # endif // FMT_UDL_TEMPLATE | |
3617 | ||
3618 | template <typename Char> | |
3619 | struct udl_arg { | |
3620 | const Char *str; | |
3621 | ||
3622 | template <typename T> | |
3623 | named_arg<T, Char> operator=(T &&value) const { | |
3624 | return {str, std::forward<T>(value)}; | |
3625 | } | |
3626 | }; | |
3627 | ||
3628 | } // namespace internal | |
3629 | ||
3630 | inline namespace literals { | |
3631 | ||
3632 | # if FMT_UDL_TEMPLATE | |
3633 | template <typename Char, Char... CHARS> | |
3634 | FMT_CONSTEXPR internal::udl_formatter<Char, CHARS...> operator""_format() { | |
3635 | return {}; | |
3636 | } | |
3637 | # else | |
3638 | /** | |
3639 | \rst | |
3640 | User-defined literal equivalent of :func:`fmt::format`. | |
3641 | ||
3642 | **Example**:: | |
3643 | ||
3644 | using namespace fmt::literals; | |
3645 | std::string message = "The answer is {}"_format(42); | |
3646 | \endrst | |
3647 | */ | |
3648 | inline internal::udl_formatter<char> | |
3649 | operator"" _format(const char *s, std::size_t) { return {s}; } | |
3650 | inline internal::udl_formatter<wchar_t> | |
3651 | operator"" _format(const wchar_t *s, std::size_t) { return {s}; } | |
3652 | # endif // FMT_UDL_TEMPLATE | |
3653 | ||
3654 | /** | |
3655 | \rst | |
3656 | User-defined literal equivalent of :func:`fmt::arg`. | |
3657 | ||
3658 | **Example**:: | |
3659 | ||
3660 | using namespace fmt::literals; | |
3661 | fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23); | |
3662 | \endrst | |
3663 | */ | |
3664 | inline internal::udl_arg<char> | |
3665 | operator"" _a(const char *s, std::size_t) { return {s}; } | |
3666 | inline internal::udl_arg<wchar_t> | |
3667 | operator"" _a(const wchar_t *s, std::size_t) { return {s}; } | |
3668 | } // inline namespace literals | |
3669 | #endif // FMT_USE_USER_DEFINED_LITERALS | |
3670 | FMT_END_NAMESPACE | |
3671 | ||
3672 | #define FMT_STRING(s) [] { \ | |
eafe8130 TL |
3673 | typedef typename std::remove_cv<std::remove_pointer< \ |
3674 | typename std::decay<decltype(s)>::type>::type>::type ct; \ | |
3675 | struct str : fmt::compile_string { \ | |
3676 | typedef ct char_type; \ | |
3677 | FMT_CONSTEXPR operator fmt::basic_string_view<ct>() const { \ | |
3678 | return {s, sizeof(s) / sizeof(ct) - 1}; \ | |
3679 | } \ | |
11fdf7f2 | 3680 | }; \ |
eafe8130 | 3681 | return str{}; \ |
11fdf7f2 TL |
3682 | }() |
3683 | ||
3684 | #if defined(FMT_STRING_ALIAS) && FMT_STRING_ALIAS | |
3685 | /** | |
3686 | \rst | |
3687 | Constructs a compile-time format string. This macro is disabled by default to | |
3688 | prevent potential name collisions. To enable it define ``FMT_STRING_ALIAS`` to | |
3689 | 1 before including ``fmt/format.h``. | |
3690 | ||
3691 | **Example**:: | |
3692 | ||
3693 | #define FMT_STRING_ALIAS 1 | |
3694 | #include <fmt/format.h> | |
3695 | // A compile-time error because 'd' is an invalid specifier for strings. | |
3696 | std::string s = format(fmt("{:d}"), "foo"); | |
3697 | \endrst | |
3698 | */ | |
3699 | # define fmt(s) FMT_STRING(s) | |
3700 | #endif | |
3701 | ||
3702 | #ifdef FMT_HEADER_ONLY | |
3703 | # define FMT_FUNC inline | |
3704 | # include "format-inl.h" | |
3705 | #else | |
3706 | # define FMT_FUNC | |
3707 | #endif | |
3708 | ||
3709 | // Restore warnings. | |
3710 | #if FMT_GCC_VERSION >= 406 || FMT_CLANG_VERSION | |
3711 | # pragma GCC diagnostic pop | |
3712 | #endif | |
3713 | ||
3714 | #endif // FMT_FORMAT_H_ |