1 /*
2 *
3 * Copyright (c) 1994
4 * Hewlett-Packard Company
5 *
6 * Copyright (c) 1996-1998
7 * Silicon Graphics Computer Systems, Inc.
8 *
9 * Copyright (c) 1997
10 * Moscow Center for SPARC Technology
11 *
12 * Copyright (c) 1999
13 * Boris Fomitchev
14 *
15 * This material is provided "as is", with absolutely no warranty expressed
16 * or implied. Any use is at your own risk.
17 *
18 * Permission to use or copy this software for any purpose is hereby granted
19 * without fee, provided the above notices are retained on all copies.
20 * Permission to modify the code and to distribute modified code is granted,
21 * provided the above notices are retained, and a notice that the code was
22 * modified is included with the above copyright notice.
23 *
24 */
25
26 /* NOTE: This is an internal header file, included by other STL headers.
27 * You should not attempt to use it directly.
28 */
29
30 #ifndef _STLP_INTERNAL_FUNCTION_H
31 #define _STLP_INTERNAL_FUNCTION_H
32
33 #ifndef _STLP_TYPE_TRAITS_H
34 # include <stl/type_traits.h>
35 #endif
36
37 #ifndef _STLP_INTERNAL_FUNCTION_BASE_H
38 # include <stl/_function_base.h>
39 #endif
40
41 _STLP_BEGIN_NAMESPACE
42
43 template <class _Tp>
44 struct not_equal_to : public binary_function<_Tp, _Tp, bool> {
operatornot_equal_to45 bool operator()(const _Tp& __x, const _Tp& __y) const { return __x != __y; }
46 };
47
48 template <class _Tp>
49 struct greater : public binary_function<_Tp, _Tp, bool> {
operatorgreater50 bool operator()(const _Tp& __x, const _Tp& __y) const { return __x > __y; }
51 };
52
53 template <class _Tp>
54 struct greater_equal : public binary_function<_Tp, _Tp, bool> {
operatorgreater_equal55 bool operator()(const _Tp& __x, const _Tp& __y) const { return __x >= __y; }
56 };
57
58 template <class _Tp>
59 struct less_equal : public binary_function<_Tp, _Tp, bool> {
operatorless_equal60 bool operator()(const _Tp& __x, const _Tp& __y) const { return __x <= __y; }
61 };
62
63 template <class _Tp>
64 struct divides : public binary_function<_Tp, _Tp, _Tp> {
operatordivides65 _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x / __y; }
66 };
67
68 template <class _Tp>
69 struct modulus : public binary_function<_Tp, _Tp, _Tp> {
operatormodulus70 _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x % __y; }
71 };
72
73 template <class _Tp>
74 struct negate : public unary_function<_Tp, _Tp> {
operatornegate75 _Tp operator()(const _Tp& __x) const { return -__x; }
76 };
77
78 template <class _Tp>
79 struct logical_and : public binary_function<_Tp, _Tp, bool> {
operatorlogical_and80 bool operator()(const _Tp& __x, const _Tp& __y) const { return __x && __y; }
81 };
82
83 template <class _Tp>
84 struct logical_or : public binary_function<_Tp, _Tp,bool> {
operatorlogical_or85 bool operator()(const _Tp& __x, const _Tp& __y) const { return __x || __y; }
86 };
87
88 template <class _Tp>
89 struct logical_not : public unary_function<_Tp, bool> {
operatorlogical_not90 bool operator()(const _Tp& __x) const { return !__x; }
91 };
92
93 #if !defined (_STLP_NO_EXTENSIONS)
94 // identity_element (not part of the C++ standard).
identity_element(plus<_Tp>)95 template <class _Tp> inline _Tp identity_element(plus<_Tp>) { return _Tp(0); }
identity_element(multiplies<_Tp>)96 template <class _Tp> inline _Tp identity_element(multiplies<_Tp>) { return _Tp(1); }
97 #endif
98
99 #if defined (_STLP_BASE_TYPEDEF_BUG)
100 // this workaround is needed for SunPro 4.0.1
101 // suggested by "Martin Abernethy" <gma@paston.co.uk>:
102
103 // We have to introduce the XXary_predicate_aux structures in order to
104 // access the argument and return types of predicate functions supplied
105 // as type parameters. SUN C++ 4.0.1 compiler gives errors for template type parameters
106 // of the form 'name1::name2', where name1 is itself a type parameter.
107 template <class _Pair>
108 struct __pair_aux : private _Pair {
109 typedef typename _Pair::first_type first_type;
110 typedef typename _Pair::second_type second_type;
111 };
112
113 template <class _Operation>
114 struct __unary_fun_aux : private _Operation {
115 typedef typename _Operation::argument_type argument_type;
116 typedef typename _Operation::result_type result_type;
117 };
118
119 template <class _Operation>
120 struct __binary_fun_aux : private _Operation {
121 typedef typename _Operation::first_argument_type first_argument_type;
122 typedef typename _Operation::second_argument_type second_argument_type;
123 typedef typename _Operation::result_type result_type;
124 };
125
126 # define __UNARY_ARG(__Operation,__type) __unary_fun_aux<__Operation>::__type
127 # define __BINARY_ARG(__Operation,__type) __binary_fun_aux<__Operation>::__type
128 # define __PAIR_ARG(__Pair,__type) __pair_aux<__Pair>::__type
129 #else
130 # define __UNARY_ARG(__Operation,__type) __Operation::__type
131 # define __BINARY_ARG(__Operation,__type) __Operation::__type
132 # define __PAIR_ARG(__Pair,__type) __Pair::__type
133 #endif
134
135 template <class _Predicate>
136 class unary_negate
137 : public unary_function<typename __UNARY_ARG(_Predicate, argument_type), bool> {
138 typedef unary_function<typename __UNARY_ARG(_Predicate, argument_type), bool> _Base;
139 public:
140 typedef typename _Base::argument_type argument_type;
141 private:
142 typedef typename __call_traits<argument_type>::const_param_type _ArgParamType;
143 protected:
144 _Predicate _M_pred;
145 public:
unary_negate(const _Predicate & __x)146 explicit unary_negate(const _Predicate& __x) : _M_pred(__x) {}
operator()147 bool operator()(_ArgParamType __x) const {
148 return !_M_pred(__x);
149 }
150 };
151
152 template <class _Predicate>
153 inline unary_negate<_Predicate>
not1(const _Predicate & __pred)154 not1(const _Predicate& __pred) {
155 return unary_negate<_Predicate>(__pred);
156 }
157
158 template <class _Predicate>
159 class binary_negate
160 : public binary_function<typename __BINARY_ARG(_Predicate, first_argument_type),
161 typename __BINARY_ARG(_Predicate, second_argument_type),
162 bool> {
163 typedef binary_function<typename __BINARY_ARG(_Predicate, first_argument_type),
164 typename __BINARY_ARG(_Predicate, second_argument_type),
165 bool> _Base;
166 public:
167 typedef typename _Base::first_argument_type first_argument_type;
168 typedef typename _Base::second_argument_type second_argument_type;
169 private:
170 typedef typename __call_traits<first_argument_type>::const_param_type _FstArgParamType;
171 typedef typename __call_traits<second_argument_type>::const_param_type _SndArgParamType;
172 protected:
173 _Predicate _M_pred;
174 public:
binary_negate(const _Predicate & __x)175 explicit binary_negate(const _Predicate& __x) : _M_pred(__x) {}
operator()176 bool operator()(_FstArgParamType __x, _SndArgParamType __y) const {
177 return !_M_pred(__x, __y);
178 }
179 };
180
181 template <class _Predicate>
182 inline binary_negate<_Predicate>
not2(const _Predicate & __pred)183 not2(const _Predicate& __pred) {
184 return binary_negate<_Predicate>(__pred);
185 }
186
187 template <class _Operation>
188 class binder1st :
189 public unary_function<typename __BINARY_ARG(_Operation, second_argument_type),
190 typename __BINARY_ARG(_Operation, result_type) > {
191 typedef unary_function<typename __BINARY_ARG(_Operation, second_argument_type),
192 typename __BINARY_ARG(_Operation, result_type) > _Base;
193 public:
194 typedef typename _Base::argument_type argument_type;
195 typedef typename _Base::result_type result_type;
196 private:
197 typedef typename __call_traits<argument_type>::param_type _ArgParamType;
198 typedef typename __call_traits<argument_type>::const_param_type _ConstArgParamType;
199 typedef typename __call_traits<typename _Operation::first_argument_type>::const_param_type _ValueParamType;
200 protected:
201 //op is a Standard name (20.3.6.1), do no make it STLport naming convention compliant.
202 _Operation op;
203 typename _Operation::first_argument_type _M_value;
204 public:
binder1st(const _Operation & __x,_ValueParamType __y)205 binder1st(const _Operation& __x, _ValueParamType __y)
206 : op(__x), _M_value(__y) {}
207
operator()208 result_type operator()(_ConstArgParamType __x) const
209 { return op(_M_value, __x); }
210 // DR 109 Missing binders for non-const sequence elements
operator()211 result_type operator()(_ArgParamType __x) const
212 { return op(_M_value, __x); }
213 };
214
215 template <class _Operation, class _Tp>
216 inline binder1st<_Operation>
bind1st(const _Operation & __fn,const _Tp & __x)217 bind1st(const _Operation& __fn, const _Tp& __x) {
218 typedef typename _Operation::first_argument_type _Arg1_type;
219 return binder1st<_Operation>(__fn, _Arg1_type(__x));
220 }
221
222 template <class _Operation>
223 class binder2nd
224 : public unary_function<typename __BINARY_ARG(_Operation, first_argument_type),
225 typename __BINARY_ARG(_Operation, result_type)> {
226 typedef unary_function<typename __BINARY_ARG(_Operation, first_argument_type),
227 typename __BINARY_ARG(_Operation, result_type)> _Base;
228 public:
229 typedef typename _Base::argument_type argument_type;
230 typedef typename _Base::result_type result_type;
231 private:
232 typedef typename __call_traits<argument_type>::param_type _ArgParamType;
233 typedef typename __call_traits<argument_type>::const_param_type _ConstArgParamType;
234 typedef typename __call_traits<typename _Operation::second_argument_type>::const_param_type _ValueParamType;
235 protected:
236 //op is a Standard name (20.3.6.3), do no make it STLport naming convention compliant.
237 _Operation op;
238 typename _Operation::second_argument_type value;
239 public:
binder2nd(const _Operation & __x,_ValueParamType __y)240 binder2nd(const _Operation& __x, _ValueParamType __y)
241 : op(__x), value(__y) {}
242
operator()243 result_type operator()(_ConstArgParamType __x) const
244 { return op(__x, value); }
245 // DR 109 Missing binders for non-const sequence elements
operator()246 result_type operator()(_ArgParamType __x) const
247 { return op(__x, value); }
248 };
249
250 template <class _Operation, class _Tp>
251 inline binder2nd<_Operation>
bind2nd(const _Operation & __fn,const _Tp & __x)252 bind2nd(const _Operation& __fn, const _Tp& __x) {
253 typedef typename _Operation::second_argument_type _Arg2_type;
254 return binder2nd<_Operation>(__fn, _Arg2_type(__x));
255 }
256
257 #if !defined (_STLP_NO_EXTENSIONS)
258 // unary_compose and binary_compose (extensions, not part of the standard).
259
260 template <class _Operation1, class _Operation2>
261 class unary_compose :
262 public unary_function<typename __UNARY_ARG(_Operation2, argument_type),
263 typename __UNARY_ARG(_Operation1, result_type)> {
264 typedef unary_function<typename __UNARY_ARG(_Operation2, argument_type),
265 typename __UNARY_ARG(_Operation1, result_type)> _Base;
266 public:
267 typedef typename _Base::argument_type argument_type;
268 typedef typename _Base::result_type result_type;
269 private:
270 typedef typename __call_traits<argument_type>::const_param_type _ArgParamType;
271 protected:
272 _Operation1 _M_fn1;
273 _Operation2 _M_fn2;
274 public:
unary_compose(const _Operation1 & __x,const _Operation2 & __y)275 unary_compose(const _Operation1& __x, const _Operation2& __y)
276 : _M_fn1(__x), _M_fn2(__y) {}
277
operator()278 result_type operator()(_ArgParamType __x) const {
279 return _M_fn1(_M_fn2(__x));
280 }
281 };
282
283 template <class _Operation1, class _Operation2>
284 inline unary_compose<_Operation1,_Operation2>
compose1(const _Operation1 & __fn1,const _Operation2 & __fn2)285 compose1(const _Operation1& __fn1, const _Operation2& __fn2) {
286 return unary_compose<_Operation1,_Operation2>(__fn1, __fn2);
287 }
288
289 template <class _Operation1, class _Operation2, class _Operation3>
290 class binary_compose :
291 public unary_function<typename __UNARY_ARG(_Operation2, argument_type),
292 typename __BINARY_ARG(_Operation1, result_type)> {
293 typedef unary_function<typename __UNARY_ARG(_Operation2, argument_type),
294 typename __BINARY_ARG(_Operation1, result_type)> _Base;
295 public:
296 typedef typename _Base::argument_type argument_type;
297 typedef typename _Base::result_type result_type;
298 private:
299 typedef typename __call_traits<argument_type>::const_param_type _ArgParamType;
300 protected:
301 _Operation1 _M_fn1;
302 _Operation2 _M_fn2;
303 _Operation3 _M_fn3;
304 public:
binary_compose(const _Operation1 & __x,const _Operation2 & __y,const _Operation3 & __z)305 binary_compose(const _Operation1& __x, const _Operation2& __y,
306 const _Operation3& __z)
307 : _M_fn1(__x), _M_fn2(__y), _M_fn3(__z) { }
308
operator()309 result_type operator()(_ArgParamType __x) const {
310 return _M_fn1(_M_fn2(__x), _M_fn3(__x));
311 }
312 };
313
314 template <class _Operation1, class _Operation2, class _Operation3>
315 inline binary_compose<_Operation1, _Operation2, _Operation3>
compose2(const _Operation1 & __fn1,const _Operation2 & __fn2,const _Operation3 & __fn3)316 compose2(const _Operation1& __fn1, const _Operation2& __fn2,
317 const _Operation3& __fn3) {
318 return binary_compose<_Operation1,_Operation2,_Operation3>(__fn1, __fn2, __fn3);
319 }
320
321 // identity is an extension: it is not part of the standard.
322 template <class _Tp> struct identity : public _STLP_PRIV _Identity<_Tp> {};
323 // select1st and select2nd are extensions: they are not part of the standard.
324 template <class _Pair> struct select1st : public _STLP_PRIV _Select1st<_Pair> {};
325 template <class _Pair> struct select2nd : public _STLP_PRIV _Select2nd<_Pair> {};
326
327 template <class _Arg1, class _Arg2>
328 struct project1st : public _STLP_PRIV _Project1st<_Arg1, _Arg2> {};
329
330 template <class _Arg1, class _Arg2>
331 struct project2nd : public _STLP_PRIV _Project2nd<_Arg1, _Arg2> {};
332
333
334 // constant_void_fun, constant_unary_fun, and constant_binary_fun are
335 // extensions: they are not part of the standard. (The same, of course,
336 // is true of the helper functions constant0, constant1, and constant2.)
337
338 _STLP_MOVE_TO_PRIV_NAMESPACE
339
340 template <class _Result>
341 struct _Constant_void_fun {
342 typedef _Result result_type;
343 result_type _M_val;
344
_Constant_void_fun_Constant_void_fun345 _Constant_void_fun(const result_type& __v) : _M_val(__v) {}
operator_Constant_void_fun346 const result_type& operator()() const { return _M_val; }
347 };
348
349 _STLP_MOVE_TO_STD_NAMESPACE
350
351 template <class _Result>
352 struct constant_void_fun : public _STLP_PRIV _Constant_void_fun<_Result> {
constant_void_funconstant_void_fun353 constant_void_fun(const _Result& __v)
354 : _STLP_PRIV _Constant_void_fun<_Result>(__v) {}
355 };
356
357 template <class _Result, _STLP_DFL_TMPL_PARAM( _Argument , _Result) >
358 struct constant_unary_fun : public _STLP_PRIV _Constant_unary_fun<_Result, _Argument> {
constant_unary_funconstant_unary_fun359 constant_unary_fun(const _Result& __v)
360 : _STLP_PRIV _Constant_unary_fun<_Result, _Argument>(__v) {}
361 };
362
363 template <class _Result, _STLP_DFL_TMPL_PARAM( _Arg1 , _Result), _STLP_DFL_TMPL_PARAM( _Arg2 , _Arg1) >
364 struct constant_binary_fun
365 : public _STLP_PRIV _Constant_binary_fun<_Result, _Arg1, _Arg2> {
constant_binary_funconstant_binary_fun366 constant_binary_fun(const _Result& __v)
367 : _STLP_PRIV _Constant_binary_fun<_Result, _Arg1, _Arg2>(__v) {}
368 };
369
370 template <class _Result>
constant0(const _Result & __val)371 inline constant_void_fun<_Result> constant0(const _Result& __val) {
372 return constant_void_fun<_Result>(__val);
373 }
374
375 template <class _Result>
constant1(const _Result & __val)376 inline constant_unary_fun<_Result,_Result> constant1(const _Result& __val) {
377 return constant_unary_fun<_Result,_Result>(__val);
378 }
379
380 template <class _Result>
381 inline constant_binary_fun<_Result,_Result,_Result>
constant2(const _Result & __val)382 constant2(const _Result& __val) {
383 return constant_binary_fun<_Result,_Result,_Result>(__val);
384 }
385
386 // subtractive_rng is an extension: it is not part of the standard.
387 // Note: this code assumes that int is 32 bits.
388 class subtractive_rng : public unary_function<_STLP_UINT32_T, _STLP_UINT32_T> {
389 private:
390 _STLP_UINT32_T _M_table[55];
391 _STLP_UINT32_T _M_index1;
392 _STLP_UINT32_T _M_index2;
393 public:
operator()394 _STLP_UINT32_T operator()(_STLP_UINT32_T __limit) {
395 _M_index1 = (_M_index1 + 1) % 55;
396 _M_index2 = (_M_index2 + 1) % 55;
397 _M_table[_M_index1] = _M_table[_M_index1] - _M_table[_M_index2];
398 return _M_table[_M_index1] % __limit;
399 }
400
_M_initialize(_STLP_UINT32_T __seed)401 void _M_initialize(_STLP_UINT32_T __seed) {
402 _STLP_UINT32_T __k = 1;
403 _M_table[54] = __seed;
404 _STLP_UINT32_T __i;
405 for (__i = 0; __i < 54; __i++) {
406 _STLP_UINT32_T __ii = (21 * (__i + 1) % 55) - 1;
407 _M_table[__ii] = __k;
408 __k = __seed - __k;
409 __seed = _M_table[__ii];
410 }
411 for (int __loop = 0; __loop < 4; __loop++) {
412 for (__i = 0; __i < 55; __i++)
413 _M_table[__i] = _M_table[__i] - _M_table[(1 + __i + 30) % 55];
414 }
415 _M_index1 = 0;
416 _M_index2 = 31;
417 }
418
subtractive_rng(unsigned int __seed)419 subtractive_rng(unsigned int __seed) { _M_initialize(__seed); }
subtractive_rng()420 subtractive_rng() { _M_initialize(161803398ul); }
421 };
422
423 #endif /* _STLP_NO_EXTENSIONS */
424
425 _STLP_END_NAMESPACE
426
427 #include <stl/_function_adaptors.h>
428
429 #endif /* _STLP_INTERNAL_FUNCTION_H */
430
431 // Local Variables:
432 // mode:C++
433 // End:
434