libstdc++

decimal
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1 // <decimal> -*- C++ -*-
2
3 // Copyright (C) 2009-2013 Free Software Foundation, Inc.
4 // This file is part of the GNU ISO C++ Library. This library is free
5 // software; you can redistribute it and/or modify it under the
6 // terms of the GNU General Public License as published by the
7 // Free Software Foundation; either version 3, or (at your option)
8 // any later version.
9
10 // This library is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
14
15 // Under Section 7 of GPL version 3, you are granted additional
16 // permissions described in the GCC Runtime Library Exception, version
17 // 3.1, as published by the Free Software Foundation.
18
19 // You should have received a copy of the GNU General Public License and
20 // a copy of the GCC Runtime Library Exception along with this program;
21 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
22 // <http://www.gnu.org/licenses/>.
23
24 /** @file decimal/decimal
25 * This is a Standard C++ Library header.
26 */
27
28 // ISO/IEC TR 24733
29 // Written by Janis Johnson <janis187@us.ibm.com>
30
31 #ifndef _GLIBCXX_DECIMAL
32 #define _GLIBCXX_DECIMAL 1
33
34 #pragma GCC system_header
35
36 #include <bits/c++config.h>
37
38 #ifndef _GLIBCXX_USE_DECIMAL_FLOAT
39 #error This file requires compiler and library support for ISO/IEC TR 24733 \
40 that is currently not available.
41 #endif
42
43 namespace std _GLIBCXX_VISIBILITY(default)
44 {
45 /**
46 * @defgroup decimal Decimal Floating-Point Arithmetic
47 * @ingroup numerics
48 *
49 * Classes and functions for decimal floating-point arithmetic.
50 * @{
51 */
52
53 /** @namespace std::decimal
54 * @brief ISO/IEC TR 24733 Decimal floating-point arithmetic.
55 */
56 namespace decimal
57 {
58 _GLIBCXX_BEGIN_NAMESPACE_VERSION
59
60 class decimal32;
61 class decimal64;
62 class decimal128;
63
64 // 3.2.5 Initialization from coefficient and exponent.
65 static decimal32 make_decimal32(long long __coeff, int __exp);
66 static decimal32 make_decimal32(unsigned long long __coeff, int __exp);
67 static decimal64 make_decimal64(long long __coeff, int __exp);
68 static decimal64 make_decimal64(unsigned long long __coeff, int __exp);
69 static decimal128 make_decimal128(long long __coeff, int __exp);
70 static decimal128 make_decimal128(unsigned long long __coeff, int __exp);
71
72 /// Non-conforming extension: Conversion to integral type.
73 long long decimal32_to_long_long(decimal32 __d);
74 long long decimal64_to_long_long(decimal64 __d);
75 long long decimal128_to_long_long(decimal128 __d);
76 long long decimal_to_long_long(decimal32 __d);
77 long long decimal_to_long_long(decimal64 __d);
78 long long decimal_to_long_long(decimal128 __d);
79
80 // 3.2.6 Conversion to generic floating-point type.
81 float decimal32_to_float(decimal32 __d);
82 float decimal64_to_float(decimal64 __d);
83 float decimal128_to_float(decimal128 __d);
84 float decimal_to_float(decimal32 __d);
85 float decimal_to_float(decimal64 __d);
86 float decimal_to_float(decimal128 __d);
87
88 double decimal32_to_double(decimal32 __d);
89 double decimal64_to_double(decimal64 __d);
90 double decimal128_to_double(decimal128 __d);
91 double decimal_to_double(decimal32 __d);
92 double decimal_to_double(decimal64 __d);
93 double decimal_to_double(decimal128 __d);
94
95 long double decimal32_to_long_double(decimal32 __d);
96 long double decimal64_to_long_double(decimal64 __d);
97 long double decimal128_to_long_double(decimal128 __d);
98 long double decimal_to_long_double(decimal32 __d);
99 long double decimal_to_long_double(decimal64 __d);
100 long double decimal_to_long_double(decimal128 __d);
101
102 // 3.2.7 Unary arithmetic operators.
103 decimal32 operator+(decimal32 __rhs);
104 decimal64 operator+(decimal64 __rhs);
105 decimal128 operator+(decimal128 __rhs);
106 decimal32 operator-(decimal32 __rhs);
107 decimal64 operator-(decimal64 __rhs);
108 decimal128 operator-(decimal128 __rhs);
109
110 // 3.2.8 Binary arithmetic operators.
111 #define _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(_Op, _T1, _T2, _T3) \
112 _T1 operator _Op(_T2 __lhs, _T3 __rhs);
113 #define _DECLARE_DECIMAL_BINARY_OP_WITH_INT(_Op, _Tp) \
114 _Tp operator _Op(_Tp __lhs, int __rhs); \
115 _Tp operator _Op(_Tp __lhs, unsigned int __rhs); \
116 _Tp operator _Op(_Tp __lhs, long __rhs); \
117 _Tp operator _Op(_Tp __lhs, unsigned long __rhs); \
118 _Tp operator _Op(_Tp __lhs, long long __rhs); \
119 _Tp operator _Op(_Tp __lhs, unsigned long long __rhs); \
120 _Tp operator _Op(int __lhs, _Tp __rhs); \
121 _Tp operator _Op(unsigned int __lhs, _Tp __rhs); \
122 _Tp operator _Op(long __lhs, _Tp __rhs); \
123 _Tp operator _Op(unsigned long __lhs, _Tp __rhs); \
124 _Tp operator _Op(long long __lhs, _Tp __rhs); \
125 _Tp operator _Op(unsigned long long __lhs, _Tp __rhs);
126
127 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal32, decimal32, decimal32)
128 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(+, decimal32)
129 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal64, decimal32, decimal64)
130 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal64, decimal64, decimal32)
131 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal64, decimal64, decimal64)
132 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(+, decimal64)
133 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal128, decimal32, decimal128)
134 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal128, decimal64, decimal128)
135 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal128, decimal128, decimal32)
136 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal128, decimal128, decimal64)
137 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(+, decimal128, decimal128, decimal128)
138 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(+, decimal128)
139
140 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal32, decimal32, decimal32)
141 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(-, decimal32)
142 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal64, decimal32, decimal64)
143 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal64, decimal64, decimal32)
144 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal64, decimal64, decimal64)
145 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(-, decimal64)
146 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal128, decimal32, decimal128)
147 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal128, decimal64, decimal128)
148 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal128, decimal128, decimal32)
149 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal128, decimal128, decimal64)
150 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(-, decimal128, decimal128, decimal128)
151 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(-, decimal128)
152
153 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal32, decimal32, decimal32)
154 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(*, decimal32)
155 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal64, decimal32, decimal64)
156 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal64, decimal64, decimal32)
157 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal64, decimal64, decimal64)
158 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(*, decimal64)
159 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal128, decimal32, decimal128)
160 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal128, decimal64, decimal128)
161 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal128, decimal128, decimal32)
162 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal128, decimal128, decimal64)
163 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(*, decimal128, decimal128, decimal128)
164 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(*, decimal128)
165
166 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal32, decimal32, decimal32)
167 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(/, decimal32)
168 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal64, decimal32, decimal64)
169 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal64, decimal64, decimal32)
170 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal64, decimal64, decimal64)
171 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(/, decimal64)
172 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal128, decimal32, decimal128)
173 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal128, decimal64, decimal128)
174 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal128, decimal128, decimal32)
175 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal128, decimal128, decimal64)
176 _DECLARE_DECIMAL_BINARY_OP_WITH_DEC(/, decimal128, decimal128, decimal128)
177 _DECLARE_DECIMAL_BINARY_OP_WITH_INT(/, decimal128)
178
179 #undef _DECLARE_DECIMAL_BINARY_OP_WITH_DEC
180 #undef _DECLARE_DECIMAL_BINARY_OP_WITH_INT
181
182 // 3.2.9 Comparison operators.
183 #define _DECLARE_DECIMAL_COMPARISON(_Op, _Tp) \
184 bool operator _Op(_Tp __lhs, decimal32 __rhs); \
185 bool operator _Op(_Tp __lhs, decimal64 __rhs); \
186 bool operator _Op(_Tp __lhs, decimal128 __rhs); \
187 bool operator _Op(_Tp __lhs, int __rhs); \
188 bool operator _Op(_Tp __lhs, unsigned int __rhs); \
189 bool operator _Op(_Tp __lhs, long __rhs); \
190 bool operator _Op(_Tp __lhs, unsigned long __rhs); \
191 bool operator _Op(_Tp __lhs, long long __rhs); \
192 bool operator _Op(_Tp __lhs, unsigned long long __rhs); \
193 bool operator _Op(int __lhs, _Tp __rhs); \
194 bool operator _Op(unsigned int __lhs, _Tp __rhs); \
195 bool operator _Op(long __lhs, _Tp __rhs); \
196 bool operator _Op(unsigned long __lhs, _Tp __rhs); \
197 bool operator _Op(long long __lhs, _Tp __rhs); \
198 bool operator _Op(unsigned long long __lhs, _Tp __rhs);
199
200 _DECLARE_DECIMAL_COMPARISON(==, decimal32)
201 _DECLARE_DECIMAL_COMPARISON(==, decimal64)
202 _DECLARE_DECIMAL_COMPARISON(==, decimal128)
203
204 _DECLARE_DECIMAL_COMPARISON(!=, decimal32)
205 _DECLARE_DECIMAL_COMPARISON(!=, decimal64)
206 _DECLARE_DECIMAL_COMPARISON(!=, decimal128)
207
208 _DECLARE_DECIMAL_COMPARISON(<, decimal32)
209 _DECLARE_DECIMAL_COMPARISON(<, decimal64)
210 _DECLARE_DECIMAL_COMPARISON(<, decimal128)
211
212 _DECLARE_DECIMAL_COMPARISON(>=, decimal32)
213 _DECLARE_DECIMAL_COMPARISON(>=, decimal64)
214 _DECLARE_DECIMAL_COMPARISON(>=, decimal128)
215
216 _DECLARE_DECIMAL_COMPARISON(>, decimal32)
217 _DECLARE_DECIMAL_COMPARISON(>, decimal64)
218 _DECLARE_DECIMAL_COMPARISON(>, decimal128)
219
220 _DECLARE_DECIMAL_COMPARISON(>=, decimal32)
221 _DECLARE_DECIMAL_COMPARISON(>=, decimal64)
222 _DECLARE_DECIMAL_COMPARISON(>=, decimal128)
223
224 #undef _DECLARE_DECIMAL_COMPARISON
225
226 /// 3.2.2 Class decimal32.
227 class decimal32
228 {
229 public:
230 typedef float __decfloat32 __attribute__((mode(SD)));
231
232 // 3.2.2.2 Construct/copy/destroy.
233 decimal32() : __val(0.e-101DF) {}
234
235 // 3.2.2.3 Conversion from floating-point type.
236 explicit decimal32(decimal64 __d64);
237 explicit decimal32(decimal128 __d128);
238 explicit decimal32(float __r) : __val(__r) {}
239 explicit decimal32(double __r) : __val(__r) {}
240 explicit decimal32(long double __r) : __val(__r) {}
241
242 // 3.2.2.4 Conversion from integral type.
243 decimal32(int __z) : __val(__z) {}
244 decimal32(unsigned int __z) : __val(__z) {}
245 decimal32(long __z) : __val(__z) {}
246 decimal32(unsigned long __z) : __val(__z) {}
247 decimal32(long long __z) : __val(__z) {}
248 decimal32(unsigned long long __z) : __val(__z) {}
249
250 /// Conforming extension: Conversion from scalar decimal type.
251 decimal32(__decfloat32 __z) : __val(__z) {}
252
253 // 3.2.2.5 Conversion to integral type. (DISABLED)
254 //operator long long() const { return (long long)__val; }
255
256 // 3.2.2.6 Increment and decrement operators.
257 decimal32& operator++()
258 {
259 __val += 1;
260 return *this;
261 }
262
263 decimal32 operator++(int)
264 {
265 decimal32 __tmp = *this;
266 __val += 1;
267 return __tmp;
268 }
269
270 decimal32& operator--()
271 {
272 __val -= 1;
273 return *this;
274 }
275
276 decimal32 operator--(int)
277 {
278 decimal32 __tmp = *this;
279 __val -= 1;
280 return __tmp;
281 }
282
283 // 3.2.2.7 Compound assignment.
284 #define _DECLARE_DECIMAL32_COMPOUND_ASSIGNMENT(_Op) \
285 decimal32& operator _Op(decimal32 __rhs); \
286 decimal32& operator _Op(decimal64 __rhs); \
287 decimal32& operator _Op(decimal128 __rhs); \
288 decimal32& operator _Op(int __rhs); \
289 decimal32& operator _Op(unsigned int __rhs); \
290 decimal32& operator _Op(long __rhs); \
291 decimal32& operator _Op(unsigned long __rhs); \
292 decimal32& operator _Op(long long __rhs); \
293 decimal32& operator _Op(unsigned long long __rhs);
294
295 _DECLARE_DECIMAL32_COMPOUND_ASSIGNMENT(+=)
296 _DECLARE_DECIMAL32_COMPOUND_ASSIGNMENT(-=)
297 _DECLARE_DECIMAL32_COMPOUND_ASSIGNMENT(*=)
298 _DECLARE_DECIMAL32_COMPOUND_ASSIGNMENT(/=)
299 #undef _DECLARE_DECIMAL32_COMPOUND_ASSIGNMENT
300
301 private:
302 __decfloat32 __val;
303
304 public:
305 __decfloat32 __getval(void) { return __val; }
306 void __setval(__decfloat32 __x) { __val = __x; }
307 };
308
309 /// 3.2.3 Class decimal64.
310 class decimal64
311 {
312 public:
313 typedef float __decfloat64 __attribute__((mode(DD)));
314
315 // 3.2.3.2 Construct/copy/destroy.
316 decimal64() : __val(0.e-398dd) {}
317
318 // 3.2.3.3 Conversion from floating-point type.
319 decimal64(decimal32 d32);
320 explicit decimal64(decimal128 d128);
321 explicit decimal64(float __r) : __val(__r) {}
322 explicit decimal64(double __r) : __val(__r) {}
323 explicit decimal64(long double __r) : __val(__r) {}
324
325 // 3.2.3.4 Conversion from integral type.
326 decimal64(int __z) : __val(__z) {}
327 decimal64(unsigned int __z) : __val(__z) {}
328 decimal64(long __z) : __val(__z) {}
329 decimal64(unsigned long __z) : __val(__z) {}
330 decimal64(long long __z) : __val(__z) {}
331 decimal64(unsigned long long __z) : __val(__z) {}
332
333 /// Conforming extension: Conversion from scalar decimal type.
334 decimal64(__decfloat64 __z) : __val(__z) {}
335
336 // 3.2.3.5 Conversion to integral type. (DISABLED)
337 //operator long long() const { return (long long)__val; }
338
339 // 3.2.3.6 Increment and decrement operators.
340 decimal64& operator++()
341 {
342 __val += 1;
343 return *this;
344 }
345
346 decimal64 operator++(int)
347 {
348 decimal64 __tmp = *this;
349 __val += 1;
350 return __tmp;
351 }
352
353 decimal64& operator--()
354 {
355 __val -= 1;
356 return *this;
357 }
358
359 decimal64 operator--(int)
360 {
361 decimal64 __tmp = *this;
362 __val -= 1;
363 return __tmp;
364 }
365
366 // 3.2.3.7 Compound assignment.
367 #define _DECLARE_DECIMAL64_COMPOUND_ASSIGNMENT(_Op) \
368 decimal64& operator _Op(decimal32 __rhs); \
369 decimal64& operator _Op(decimal64 __rhs); \
370 decimal64& operator _Op(decimal128 __rhs); \
371 decimal64& operator _Op(int __rhs); \
372 decimal64& operator _Op(unsigned int __rhs); \
373 decimal64& operator _Op(long __rhs); \
374 decimal64& operator _Op(unsigned long __rhs); \
375 decimal64& operator _Op(long long __rhs); \
376 decimal64& operator _Op(unsigned long long __rhs);
377
378 _DECLARE_DECIMAL64_COMPOUND_ASSIGNMENT(+=)
379 _DECLARE_DECIMAL64_COMPOUND_ASSIGNMENT(-=)
380 _DECLARE_DECIMAL64_COMPOUND_ASSIGNMENT(*=)
381 _DECLARE_DECIMAL64_COMPOUND_ASSIGNMENT(/=)
382 #undef _DECLARE_DECIMAL64_COMPOUND_ASSIGNMENT
383
384 private:
385 __decfloat64 __val;
386
387 public:
388 __decfloat64 __getval(void) { return __val; }
389 void __setval(__decfloat64 __x) { __val = __x; }
390 };
391
392 /// 3.2.4 Class decimal128.
393 class decimal128
394 {
395 public:
396 typedef float __decfloat128 __attribute__((mode(TD)));
397
398 // 3.2.4.2 Construct/copy/destroy.
399 decimal128() : __val(0.e-6176DL) {}
400
401 // 3.2.4.3 Conversion from floating-point type.
402 decimal128(decimal32 d32);
403 decimal128(decimal64 d64);
404 explicit decimal128(float __r) : __val(__r) {}
405 explicit decimal128(double __r) : __val(__r) {}
406 explicit decimal128(long double __r) : __val(__r) {}
407
408
409 // 3.2.4.4 Conversion from integral type.
410 decimal128(int __z) : __val(__z) {}
411 decimal128(unsigned int __z) : __val(__z) {}
412 decimal128(long __z) : __val(__z) {}
413 decimal128(unsigned long __z) : __val(__z) {}
414 decimal128(long long __z) : __val(__z) {}
415 decimal128(unsigned long long __z) : __val(__z) {}
416
417 /// Conforming extension: Conversion from scalar decimal type.
418 decimal128(__decfloat128 __z) : __val(__z) {}
419
420 // 3.2.4.5 Conversion to integral type. (DISABLED)
421 //operator long long() const { return (long long)__val; }
422
423 // 3.2.4.6 Increment and decrement operators.
424 decimal128& operator++()
425 {
426 __val += 1;
427 return *this;
428 }
429
430 decimal128 operator++(int)
431 {
432 decimal128 __tmp = *this;
433 __val += 1;
434 return __tmp;
435 }
436
437 decimal128& operator--()
438 {
439 __val -= 1;
440 return *this;
441 }
442
443 decimal128 operator--(int)
444 {
445 decimal128 __tmp = *this;
446 __val -= 1;
447 return __tmp;
448 }
449
450 // 3.2.4.7 Compound assignment.
451 #define _DECLARE_DECIMAL128_COMPOUND_ASSIGNMENT(_Op) \
452 decimal128& operator _Op(decimal32 __rhs); \
453 decimal128& operator _Op(decimal64 __rhs); \
454 decimal128& operator _Op(decimal128 __rhs); \
455 decimal128& operator _Op(int __rhs); \
456 decimal128& operator _Op(unsigned int __rhs); \
457 decimal128& operator _Op(long __rhs); \
458 decimal128& operator _Op(unsigned long __rhs); \
459 decimal128& operator _Op(long long __rhs); \
460 decimal128& operator _Op(unsigned long long __rhs);
461
462 _DECLARE_DECIMAL128_COMPOUND_ASSIGNMENT(+=)
463 _DECLARE_DECIMAL128_COMPOUND_ASSIGNMENT(-=)
464 _DECLARE_DECIMAL128_COMPOUND_ASSIGNMENT(*=)
465 _DECLARE_DECIMAL128_COMPOUND_ASSIGNMENT(/=)
466 #undef _DECLARE_DECIMAL128_COMPOUND_ASSIGNMENT
467
468 private:
469 __decfloat128 __val;
470
471 public:
472 __decfloat128 __getval(void) { return __val; }
473 void __setval(__decfloat128 __x) { __val = __x; }
474 };
475
476 #define _GLIBCXX_USE_DECIMAL_ 1
477
478 _GLIBCXX_END_NAMESPACE_VERSION
479 } // namespace decimal
480 // @} group decimal
481 } // namespace std
482
483 #include <decimal/decimal.h>
484
485 #endif /* _GLIBCXX_DECIMAL */