GetFEM  5.4.4
gmm_conjugated.h
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30 ===========================================================================*/
31 
32 /**@file gmm_conjugated.h
33  @author Yves Renard <Yves.Renard@insa-lyon.fr>
34  @date September 18, 2003.
35  @brief handle conjugation of complex matrices/vectors.
36 */
37 #ifndef GMM_CONJUGATED_H__
38 #define GMM_CONJUGATED_H__
39 
40 #include "gmm_def.h"
41 
42 namespace gmm {
43  ///@cond DOXY_SHOW_ALL_FUNCTIONS
44 
45  /* ********************************************************************* */
46  /* Conjugated references on vectors */
47  /* ********************************************************************* */
48 
49  template <typename IT> struct conjugated_const_iterator {
50  typedef typename std::iterator_traits<IT>::value_type value_type;
51  typedef typename std::iterator_traits<IT>::pointer pointer;
52  typedef typename std::iterator_traits<IT>::reference reference;
53  typedef typename std::iterator_traits<IT>::difference_type difference_type;
54  typedef typename std::iterator_traits<IT>::iterator_category
55  iterator_category;
56 
57  IT it;
58 
59  conjugated_const_iterator(void) {}
60  conjugated_const_iterator(const IT &i) : it(i) {}
61 
62  inline size_type index(void) const { return it.index(); }
63  conjugated_const_iterator operator ++(int)
64  { conjugated_const_iterator tmp = *this; ++it; return tmp; }
65  conjugated_const_iterator operator --(int)
66  { conjugated_const_iterator tmp = *this; --it; return tmp; }
67  conjugated_const_iterator &operator ++() { ++it; return *this; }
68  conjugated_const_iterator &operator --() { --it; return *this; }
69  conjugated_const_iterator &operator +=(difference_type i)
70  { it += i; return *this; }
71  conjugated_const_iterator &operator -=(difference_type i)
72  { it -= i; return *this; }
73  conjugated_const_iterator operator +(difference_type i) const
74  { conjugated_const_iterator itb = *this; return (itb += i); }
75  conjugated_const_iterator operator -(difference_type i) const
76  { conjugated_const_iterator itb = *this; return (itb -= i); }
77  difference_type operator -(const conjugated_const_iterator &i) const
78  { return difference_type(it - i.it); }
79 
80  value_type operator *() const { return gmm::conj(*it); }
81  value_type operator [](size_type ii) const { return gmm::conj(it[ii]); }
82 
83  bool operator ==(const conjugated_const_iterator &i) const
84  { return (i.it == it); }
85  bool operator !=(const conjugated_const_iterator &i) const
86  { return (i.it != it); }
87  bool operator < (const conjugated_const_iterator &i) const
88  { return (it < i.it); }
89  bool operator > (const conjugated_const_iterator &i) const
90  { return (it > i.it); }
91  bool operator >= (const conjugated_const_iterator &i) const
92  { return (it >= i.it); }
93  };
94 
95  template <typename V> struct conjugated_vector_const_ref {
96  typedef conjugated_vector_const_ref<V> this_type;
97  typedef typename linalg_traits<V>::value_type value_type;
98  typedef typename linalg_traits<V>::const_iterator iterator;
99  typedef typename linalg_traits<this_type>::reference reference;
100  typedef typename linalg_traits<this_type>::origin_type origin_type;
101 
102  iterator begin_, end_;
103  const origin_type *origin;
104  size_type size_;
105 
106  conjugated_vector_const_ref(const V &v)
107  : begin_(vect_const_begin(v)), end_(vect_const_end(v)),
108  origin(linalg_origin(v)),
109  size_(vect_size(v)) {}
110 
111  reference operator[](size_type i) const
112  { return gmm::conj(linalg_traits<V>::access(origin, begin_, end_, i)); }
113  };
114 
115  template <typename V> struct linalg_traits<conjugated_vector_const_ref<V> > {
116  typedef conjugated_vector_const_ref<V> this_type;
117  typedef typename linalg_traits<V>::origin_type origin_type;
118  typedef linalg_const is_reference;
119  typedef abstract_vector linalg_type;
120  typedef typename linalg_traits<V>::value_type value_type;
121  typedef value_type reference;
122  typedef abstract_null_type iterator;
123  typedef conjugated_const_iterator<typename
124  linalg_traits<V>::const_iterator> const_iterator;
125  typedef typename linalg_traits<V>::storage_type storage_type;
126  typedef typename linalg_traits<V>::index_sorted index_sorted;
127  static size_type size(const this_type &v) { return v.size_; }
128  static iterator begin(this_type &v) { return iterator(v.begin_); }
129  static const_iterator begin(const this_type &v)
130  { return const_iterator(v.begin_); }
131  static iterator end(this_type &v)
132  { return iterator(v.end_); }
133  static const_iterator end(const this_type &v)
134  { return const_iterator(v.end_); }
135  static value_type access(const origin_type *o, const const_iterator &it,
136  const const_iterator &ite, size_type i)
137  { return gmm::conj(linalg_traits<V>::access(o, it.it, ite.it, i)); }
138  static const origin_type* origin(const this_type &v) { return v.origin; }
139  };
140 
141  template<typename V> std::ostream &operator <<
142  (std::ostream &o, const conjugated_vector_const_ref<V>& m)
143  { gmm::write(o,m); return o; }
144 
145  /* ********************************************************************* */
146  /* Conjugated references on matrices */
147  /* ********************************************************************* */
148 
149  template <typename M> struct conjugated_row_const_iterator {
150  typedef conjugated_row_const_iterator<M> iterator;
151  typedef typename linalg_traits<M>::const_row_iterator ITER;
152  typedef typename linalg_traits<M>::value_type value_type;
153  typedef ptrdiff_t difference_type;
154  typedef size_t size_type;
155 
156  ITER it;
157 
158  iterator operator ++(int) { iterator tmp = *this; it++; return tmp; }
159  iterator operator --(int) { iterator tmp = *this; it--; return tmp; }
160  iterator &operator ++() { it++; return *this; }
161  iterator &operator --() { it--; return *this; }
162  iterator &operator +=(difference_type i) { it += i; return *this; }
163  iterator &operator -=(difference_type i) { it -= i; return *this; }
164  iterator operator +(difference_type i) const
165  { iterator itt = *this; return (itt += i); }
166  iterator operator -(difference_type i) const
167  { iterator itt = *this; return (itt -= i); }
168  difference_type operator -(const iterator &i) const
169  { return it - i.it; }
170 
171  ITER operator *() const { return it; }
172  ITER operator [](int i) { return it + i; }
173 
174  bool operator ==(const iterator &i) const { return (it == i.it); }
175  bool operator !=(const iterator &i) const { return !(i == *this); }
176  bool operator < (const iterator &i) const { return (it < i.it); }
177  bool operator > (const iterator &i) const { return (it > i.it); }
178  bool operator >=(const iterator &i) const { return (it >= i.it); }
179 
180  conjugated_row_const_iterator(void) {}
181  conjugated_row_const_iterator(const ITER &i) : it(i) { }
182 
183  };
184 
185  template <typename M> struct conjugated_row_matrix_const_ref {
186 
187  typedef conjugated_row_matrix_const_ref<M> this_type;
188  typedef typename linalg_traits<M>::const_row_iterator iterator;
189  typedef typename linalg_traits<M>::value_type value_type;
190  typedef typename linalg_traits<this_type>::origin_type origin_type;
191 
192  iterator begin_, end_;
193  const origin_type *origin;
194  size_type nr, nc;
195 
196  conjugated_row_matrix_const_ref(const M &m)
197  : begin_(mat_row_begin(m)), end_(mat_row_end(m)),
198  origin(linalg_origin(m)), nr(mat_ncols(m)), nc(mat_nrows(m)) {}
199 
200  value_type operator()(size_type i, size_type j) const
201  { return gmm::conj(linalg_traits<M>::access(begin_+j, i)); }
202  };
203 
204  template<typename M> std::ostream &operator <<
205  (std::ostream &o, const conjugated_row_matrix_const_ref<M>& m)
206  { gmm::write(o,m); return o; }
207 
208 
209  template <typename M> struct conjugated_col_const_iterator {
210  typedef conjugated_col_const_iterator<M> iterator;
211  typedef typename linalg_traits<M>::const_col_iterator ITER;
212  typedef typename linalg_traits<M>::value_type value_type;
213  typedef ptrdiff_t difference_type;
214  typedef size_t size_type;
215 
216  ITER it;
217 
218  iterator operator ++(int) { iterator tmp = *this; it++; return tmp; }
219  iterator operator --(int) { iterator tmp = *this; it--; return tmp; }
220  iterator &operator ++() { it++; return *this; }
221  iterator &operator --() { it--; return *this; }
222  iterator &operator +=(difference_type i) { it += i; return *this; }
223  iterator &operator -=(difference_type i) { it -= i; return *this; }
224  iterator operator +(difference_type i) const
225  { iterator itt = *this; return (itt += i); }
226  iterator operator -(difference_type i) const
227  { iterator itt = *this; return (itt -= i); }
228  difference_type operator -(const iterator &i) const
229  { return it - i.it; }
230 
231  ITER operator *() const { return it; }
232  ITER operator [](int i) { return it + i; }
233 
234  bool operator ==(const iterator &i) const { return (it == i.it); }
235  bool operator !=(const iterator &i) const { return !(i == *this); }
236  bool operator < (const iterator &i) const { return (it < i.it); }
237  bool operator > (const iterator &i) const { return (it > i.it); }
238  bool operator >=(const iterator &i) const { return (it >= i.it); }
239 
240  conjugated_col_const_iterator(void) {}
241  conjugated_col_const_iterator(const ITER &i) : it(i) { }
242 
243  };
244 
245  template <typename M> struct conjugated_col_matrix_const_ref {
246 
247  typedef conjugated_col_matrix_const_ref<M> this_type;
248  typedef typename linalg_traits<M>::const_col_iterator iterator;
249  typedef typename linalg_traits<M>::value_type value_type;
250  typedef typename linalg_traits<this_type>::origin_type origin_type;
251 
252  iterator begin_, end_;
253  const origin_type *origin;
254  size_type nr, nc;
255 
256  conjugated_col_matrix_const_ref(const M &m)
257  : begin_(mat_col_begin(m)), end_(mat_col_end(m)),
258  origin(linalg_origin(m)), nr(mat_ncols(m)), nc(mat_nrows(m)) {}
259 
260  value_type operator()(size_type i, size_type j) const
261  { return gmm::conj(linalg_traits<M>::access(begin_+i, j)); }
262  };
263 
264 
265 
266  template<typename M> std::ostream &operator <<
267  (std::ostream &o, const conjugated_col_matrix_const_ref<M>& m)
268  { gmm::write(o,m); return o; }
269 
270 
271  template <typename L, typename SO> struct conjugated_return__ {
272  typedef conjugated_row_matrix_const_ref<L> return_type;
273  };
274  template <typename L> struct conjugated_return__<L, col_major> {
275  typedef conjugated_col_matrix_const_ref<L> return_type;
276  };
277  template <typename L, typename T, typename LT> struct conjugated_return_ {
278  typedef const L & return_type;
279  };
280  template <typename L, typename T>
281  struct conjugated_return_<L, std::complex<T>, abstract_vector> {
282  typedef conjugated_vector_const_ref<L> return_type;
283  };
284  template <typename L, typename T>
285  struct conjugated_return_<L, T, abstract_matrix> {
286  typedef typename conjugated_return__<L,
287  typename principal_orientation_type<typename
288  linalg_traits<L>::sub_orientation>::potype
289  >::return_type return_type;
290  };
291  template <typename L> struct conjugated_return {
292  typedef typename
293  conjugated_return_<L, typename linalg_traits<L>::value_type,
294  typename linalg_traits<L>::linalg_type
295  >::return_type return_type;
296  };
297 
298  ///@endcond
299  /** return a conjugated view of the input matrix or vector. */
300  template <typename L> inline
301  typename conjugated_return<L>::return_type
302  conjugated(const L &v) {
303  return conjugated(v, typename linalg_traits<L>::value_type(),
304  typename linalg_traits<L>::linalg_type());
305  }
306  ///@cond DOXY_SHOW_ALL_FUNCTIONS
307 
308  template <typename L, typename T, typename LT> inline
309  const L & conjugated(const L &v, T, LT) { return v; }
310 
311  template <typename L, typename T> inline
312  conjugated_vector_const_ref<L> conjugated(const L &v, std::complex<T>,
313  abstract_vector)
314  { return conjugated_vector_const_ref<L>(v); }
315 
316  template <typename L, typename T> inline
317  typename conjugated_return__<L,
318  typename principal_orientation_type<typename
319  linalg_traits<L>::sub_orientation>::potype>::return_type
320  conjugated(const L &v, T, abstract_matrix) {
321  return conjugated(v, typename principal_orientation_type<typename
322  linalg_traits<L>::sub_orientation>::potype());
323  }
324 
325  template <typename L> inline
326  conjugated_row_matrix_const_ref<L> conjugated(const L &v, row_major)
327  { return conjugated_row_matrix_const_ref<L>(v); }
328 
329  template <typename L> inline
330  conjugated_col_matrix_const_ref<L> conjugated(const L &v, col_major)
331  { return conjugated_col_matrix_const_ref<L>(v); }
332 
333  template <typename M>
334  struct linalg_traits<conjugated_row_matrix_const_ref<M> > {
335  typedef conjugated_row_matrix_const_ref<M> this_type;
336  typedef typename linalg_traits<M>::origin_type origin_type;
337  typedef linalg_const is_reference;
338  typedef abstract_matrix linalg_type;
339  typedef typename linalg_traits<M>::value_type value_type;
340  typedef value_type reference;
341  typedef typename linalg_traits<M>::storage_type storage_type;
342  typedef typename org_type<typename linalg_traits<M>::const_sub_row_type>::t vector_type;
343  typedef conjugated_vector_const_ref<vector_type> sub_col_type;
344  typedef conjugated_vector_const_ref<vector_type> const_sub_col_type;
345  typedef conjugated_row_const_iterator<M> col_iterator;
346  typedef conjugated_row_const_iterator<M> const_col_iterator;
347  typedef abstract_null_type const_sub_row_type;
348  typedef abstract_null_type sub_row_type;
349  typedef abstract_null_type const_row_iterator;
350  typedef abstract_null_type row_iterator;
351  typedef col_major sub_orientation;
352  typedef typename linalg_traits<M>::index_sorted index_sorted;
353  static inline size_type ncols(const this_type &m) { return m.nc; }
354  static inline size_type nrows(const this_type &m) { return m.nr; }
355  static inline const_sub_col_type col(const const_col_iterator &it)
356  { return conjugated(linalg_traits<M>::row(it.it)); }
357  static inline const_col_iterator col_begin(const this_type &m)
358  { return const_col_iterator(m.begin_); }
359  static inline const_col_iterator col_end(const this_type &m)
360  { return const_col_iterator(m.end_); }
361  static inline const origin_type* origin(const this_type &m)
362  { return m.origin; }
363  static value_type access(const const_col_iterator &it, size_type i)
364  { return gmm::conj(linalg_traits<M>::access(it.it, i)); }
365  };
366 
367  template <typename M>
368  struct linalg_traits<conjugated_col_matrix_const_ref<M> > {
369  typedef conjugated_col_matrix_const_ref<M> this_type;
370  typedef typename linalg_traits<M>::origin_type origin_type;
371  typedef linalg_const is_reference;
372  typedef abstract_matrix linalg_type;
373  typedef typename linalg_traits<M>::value_type value_type;
374  typedef value_type reference;
375  typedef typename linalg_traits<M>::storage_type storage_type;
376  typedef typename org_type<typename linalg_traits<M>::const_sub_col_type>::t vector_type;
377  typedef conjugated_vector_const_ref<vector_type> sub_row_type;
378  typedef conjugated_vector_const_ref<vector_type> const_sub_row_type;
379  typedef conjugated_col_const_iterator<M> row_iterator;
380  typedef conjugated_col_const_iterator<M> const_row_iterator;
381  typedef abstract_null_type const_sub_col_type;
382  typedef abstract_null_type sub_col_type;
383  typedef abstract_null_type const_col_iterator;
384  typedef abstract_null_type col_iterator;
385  typedef row_major sub_orientation;
386  typedef typename linalg_traits<M>::index_sorted index_sorted;
387  static inline size_type nrows(const this_type &m) { return m.nr; }
388  static inline size_type ncols(const this_type &m) { return m.nc; }
389  static inline const_sub_row_type row(const const_row_iterator &it)
390  { return conjugated(linalg_traits<M>::col(it.it)); }
391  static inline const_row_iterator row_begin(const this_type &m)
392  { return const_row_iterator(m.begin_); }
393  static inline const_row_iterator row_end(const this_type &m)
394  { return const_row_iterator(m.end_); }
395  static inline const origin_type* origin(const this_type &m)
396  { return m.origin; }
397  static value_type access(const const_row_iterator &it, size_type i)
398  { return gmm::conj(linalg_traits<M>::access(it.it, i)); }
399  };
400 
401  ///@endcond
402 
403 
404 }
405 
406 #endif // GMM_CONJUGATED_H__
gmm::conjugated
conjugated_return< L >::return_type conjugated(const L &v)
return a conjugated view of the input matrix or vector.
Definition: gmm_conjugated.h:302
gmm_def.h
Basic definitions and tools of GMM.
bgeot::operator-
rational_fraction< T > operator-(const polynomial< T > &P, const rational_fraction< T > &Q)
Subtract Q from P.
Definition: bgeot_poly.h:756
bgeot::operator+
rational_fraction< T > operator+(const polynomial< T > &P, const rational_fraction< T > &Q)
Add Q to P.
Definition: bgeot_poly.h:749
bgeot::size_type
size_t size_type
used as the common size type in the library
Definition: bgeot_poly.h:49