Mercurial > hg > octave-lyh
annotate liboctave/Sparse.h @ 10514:40c58502a78b
improve conversion & copy ctors of sparse matrix
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Tue, 13 Apr 2010 12:45:24 +0200 |
| parents | aac9f4265048 |
| children | 189274f6c7c4 |
| rev | line source |
|---|---|
| 5164 | 1 // Template sparse classes |
| 2 /* | |
| 3 | |
| 8920 | 4 Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009 David Bateman |
| 7016 | 5 Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 Andy Adler |
| 6 | |
| 7 This file is part of Octave. | |
| 5164 | 8 |
| 9 Octave is free software; you can redistribute it and/or modify it | |
| 10 under the terms of the GNU General Public License as published by the | |
| 7016 | 11 Free Software Foundation; either version 3 of the License, or (at your |
| 12 option) any later version. | |
| 5164 | 13 |
| 14 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 17 for more details. | |
| 18 | |
| 19 You should have received a copy of the GNU General Public License | |
| 7016 | 20 along with Octave; see the file COPYING. If not, see |
| 21 <http://www.gnu.org/licenses/>. | |
| 5164 | 22 |
| 23 */ | |
| 24 | |
| 25 #if !defined (octave_Sparse_h) | |
| 26 #define octave_Sparse_h 1 | |
| 27 | |
| 28 #include <cassert> | |
| 29 #include <cstddef> | |
| 30 | |
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31 #include <iosfwd> |
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32 #include <algorithm> |
| 5164 | 33 |
| 34 #include "Array.h" | |
| 35 #include "dim-vector.h" | |
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36 #include "lo-error.h" |
| 5164 | 37 #include "lo-utils.h" |
| 38 | |
| 7433 | 39 #include "oct-sort.h" |
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40 #include "oct-mem.h" |
| 7433 | 41 |
| 5164 | 42 class idx_vector; |
| 43 | |
| 44 // Two dimensional sparse class. Handles the reference counting for | |
| 45 // all the derived classes. | |
| 46 | |
| 47 template <class T> | |
| 48 class | |
| 49 Sparse | |
| 50 { | |
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51 public: |
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52 |
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53 typedef T element_type; |
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54 |
| 5164 | 55 protected: |
| 56 //-------------------------------------------------------------------- | |
| 57 // The real representation of all Sparse arrays. | |
| 58 //-------------------------------------------------------------------- | |
| 59 | |
| 6108 | 60 class OCTAVE_API SparseRep |
| 5164 | 61 { |
| 62 public: | |
| 63 | |
| 64 T *d; | |
| 5275 | 65 octave_idx_type *r; |
| 66 octave_idx_type *c; | |
| 5604 | 67 octave_idx_type nzmx; |
| 5275 | 68 octave_idx_type nrows; |
| 69 octave_idx_type ncols; | |
| 5164 | 70 int count; |
| 71 | |
| 5604 | 72 SparseRep (void) : d (0), r (0), c (new octave_idx_type [1]), nzmx (0), nrows (0), |
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73 ncols (0), count (1) { c[0] = 0; } |
| 5164 | 74 |
| 5604 | 75 SparseRep (octave_idx_type n) : d (0), r (0), c (new octave_idx_type [n+1]), nzmx (0), nrows (n), |
| 5164 | 76 ncols (n), count (1) |
| 77 { | |
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78 for (octave_idx_type i = 0; i < n + 1; i++) |
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79 c[i] = 0; |
| 5164 | 80 } |
| 81 | |
| 5604 | 82 SparseRep (octave_idx_type nr, octave_idx_type nc) : d (0), r (0), c (new octave_idx_type [nc+1]), nzmx (0), |
| 5164 | 83 nrows (nr), ncols (nc), count (1) |
| 84 { | |
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85 for (octave_idx_type i = 0; i < nc + 1; i++) |
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86 c[i] = 0; |
| 5164 | 87 } |
| 88 | |
| 5275 | 89 SparseRep (octave_idx_type nr, octave_idx_type nc, octave_idx_type nz) : d (new T [nz]), |
| 5604 | 90 r (new octave_idx_type [nz]), c (new octave_idx_type [nc+1]), nzmx (nz), nrows (nr), |
| 5164 | 91 ncols (nc), count (1) |
| 92 { | |
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93 for (octave_idx_type i = 0; i < nc + 1; i++) |
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94 c[i] = 0; |
| 5164 | 95 } |
| 96 | |
| 97 SparseRep (const SparseRep& a) | |
| 5604 | 98 : d (new T [a.nzmx]), r (new octave_idx_type [a.nzmx]), c (new octave_idx_type [a.ncols + 1]), |
| 99 nzmx (a.nzmx), nrows (a.nrows), ncols (a.ncols), count (1) | |
| 5164 | 100 { |
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101 octave_idx_type nz = a.nnz (); |
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102 copy_or_memcpy (nz, a.d, d); |
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103 copy_or_memcpy (nz, a.r, r); |
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104 copy_or_memcpy (ncols + 1, a.c, c); |
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105 } |
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106 |
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107 template <class U> |
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108 SparseRep (const Sparse<U>::SparseRep& a) |
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109 : d (new T [a.nzmx]), r (new octave_idx_type [a.nzmx]), c (new octave_idx_type [a.ncols + 1]), |
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110 nzmx (a.nzmx), nrows (a.nrows), ncols (a.ncols), count (1) |
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111 { |
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112 octave_idx_type nz = a.nnz (); |
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113 std::copy (a.d, a.d + nz, d); |
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114 copy_or_memcpy (nz, a.r, r); |
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115 copy_or_memcpy (ncols + 1, a.c, c); |
| 5164 | 116 } |
| 117 | |
| 118 ~SparseRep (void) { delete [] d; delete [] r; delete [] c; } | |
| 119 | |
| 5604 | 120 octave_idx_type length (void) const { return nzmx; } |
| 5164 | 121 |
| 5604 | 122 octave_idx_type nnz (void) const { return c [ncols]; } |
| 5164 | 123 |
| 5275 | 124 T& elem (octave_idx_type _r, octave_idx_type _c); |
| 5164 | 125 |
| 5275 | 126 T celem (octave_idx_type _r, octave_idx_type _c) const; |
| 5164 | 127 |
| 5275 | 128 T& data (octave_idx_type i) { return d[i]; } |
| 5164 | 129 |
| 5275 | 130 T cdata (octave_idx_type i) const { return d[i]; } |
| 5164 | 131 |
| 5275 | 132 octave_idx_type& ridx (octave_idx_type i) { return r[i]; } |
| 5164 | 133 |
| 5275 | 134 octave_idx_type cridx (octave_idx_type i) const { return r[i]; } |
| 5164 | 135 |
| 5275 | 136 octave_idx_type& cidx (octave_idx_type i) { return c[i]; } |
| 5164 | 137 |
| 5275 | 138 octave_idx_type ccidx (octave_idx_type i) const { return c[i]; } |
| 5164 | 139 |
| 140 void maybe_compress (bool remove_zeros); | |
| 141 | |
| 5275 | 142 void change_length (octave_idx_type nz); |
| 5164 | 143 |
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144 bool indices_ok (void) const; |
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145 |
| 5164 | 146 private: |
| 147 | |
| 148 // No assignment! | |
| 149 | |
| 150 SparseRep& operator = (const SparseRep& a); | |
| 151 }; | |
| 152 | |
| 153 //-------------------------------------------------------------------- | |
| 154 | |
| 155 void make_unique (void) | |
| 156 { | |
| 157 if (rep->count > 1) | |
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158 { |
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159 --rep->count; |
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160 rep = new SparseRep (*rep); |
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161 } |
| 5164 | 162 } |
| 163 | |
| 164 public: | |
| 165 | |
| 166 // !!! WARNING !!! -- these should be protected, not public. You | |
| 167 // should not access these data members directly! | |
| 168 | |
| 169 typename Sparse<T>::SparseRep *rep; | |
| 170 | |
| 171 dim_vector dimensions; | |
| 172 | |
| 173 private: | |
| 174 | |
| 175 typename Sparse<T>::SparseRep *nil_rep (void) const | |
| 176 { | |
| 177 static typename Sparse<T>::SparseRep *nr | |
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178 = new typename Sparse<T>::SparseRep (); |
| 5164 | 179 |
| 180 nr->count++; | |
| 181 | |
| 182 return nr; | |
| 183 } | |
| 184 | |
| 185 public: | |
| 186 | |
| 187 Sparse (void) | |
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188 : rep (nil_rep ()), dimensions (dim_vector(0,0)) { } |
| 5164 | 189 |
| 5275 | 190 explicit Sparse (octave_idx_type n) |
| 5164 | 191 : rep (new typename Sparse<T>::SparseRep (n)), |
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192 dimensions (dim_vector (n, n)) { } |
| 5164 | 193 |
| 5275 | 194 explicit Sparse (octave_idx_type nr, octave_idx_type nc) |
| 5164 | 195 : rep (new typename Sparse<T>::SparseRep (nr, nc)), |
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196 dimensions (dim_vector (nr, nc)) { } |
| 5164 | 197 |
| 5275 | 198 explicit Sparse (octave_idx_type nr, octave_idx_type nc, T val); |
| 5164 | 199 |
| 5275 | 200 Sparse (const dim_vector& dv, octave_idx_type nz) |
| 5164 | 201 : rep (new typename Sparse<T>::SparseRep (dv(0), dv(1), nz)), |
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202 dimensions (dv) { } |
| 5164 | 203 |
| 5275 | 204 Sparse (octave_idx_type nr, octave_idx_type nc, octave_idx_type nz) |
| 5164 | 205 : rep (new typename Sparse<T>::SparseRep (nr, nc, nz)), |
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206 dimensions (dim_vector (nr, nc)) { } |
| 5164 | 207 |
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208 // Type conversion case. Preserves capacity (). |
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209 template <class U> Sparse (const Sparse<U>& a) |
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210 : rep (new typename Sparse<T>::SparseRep (a.rep)), |
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211 dimensions (a.dimensions) { } |
| 5164 | 212 |
| 213 // No type conversion case. | |
| 214 Sparse (const Sparse<T>& a) | |
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215 : rep (a.rep), dimensions (a.dimensions) |
| 5164 | 216 { |
| 217 rep->count++; | |
| 218 } | |
| 219 | |
| 220 public: | |
| 221 | |
| 222 Sparse (const dim_vector& dv); | |
| 223 | |
| 224 Sparse (const Sparse<T>& a, const dim_vector& dv); | |
| 225 | |
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226 Sparse (const Array<T>& a, const idx_vector& r, const idx_vector& c, |
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227 octave_idx_type nr = -1, octave_idx_type nc = -1, bool sum_terms = true); |
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228 |
| 5164 | 229 // Sparsify a normal matrix |
| 230 Sparse (const Array<T>& a); | |
| 231 | |
| 232 virtual ~Sparse (void); | |
| 233 | |
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234 Sparse<T>& operator = (const Sparse<T>& a); |
| 5164 | 235 |
| 5604 | 236 // Note that nzmax and capacity are the amount of storage for |
| 237 // non-zero elements, while nnz is the actual number of non-zero | |
| 238 // terms. | |
| 239 octave_idx_type nzmax (void) const { return rep->length (); } | |
| 240 octave_idx_type capacity (void) const { return nzmax (); } | |
| 241 octave_idx_type nnz (void) const { return rep->nnz (); } | |
| 5164 | 242 |
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243 // Querying the number of elements (incl. zeros) may overflow the index type, |
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244 // so don't do it unless you really need it. |
| 5275 | 245 octave_idx_type numel (void) const |
| 5164 | 246 { |
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247 return dimensions.safe_numel (); |
| 5164 | 248 } |
| 249 | |
| 5275 | 250 octave_idx_type nelem (void) const { return capacity (); } |
| 251 octave_idx_type length (void) const { return numel (); } | |
| 5164 | 252 |
| 5275 | 253 octave_idx_type dim1 (void) const { return dimensions(0); } |
| 254 octave_idx_type dim2 (void) const { return dimensions(1); } | |
| 5164 | 255 |
| 5275 | 256 octave_idx_type rows (void) const { return dim1 (); } |
| 257 octave_idx_type cols (void) const { return dim2 (); } | |
| 258 octave_idx_type columns (void) const { return dim2 (); } | |
| 5164 | 259 |
| 5275 | 260 octave_idx_type get_row_index (octave_idx_type k) { return ridx (k); } |
| 261 octave_idx_type get_col_index (octave_idx_type k) | |
| 5164 | 262 { |
| 5275 | 263 octave_idx_type ret = 0; |
| 5164 | 264 while (cidx(ret+1) < k) |
| 265 ret++; | |
| 266 return ret; | |
| 267 } | |
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268 |
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269 size_t byte_size (void) const |
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270 { |
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271 return (static_cast<size_t>(cols () + 1) * sizeof (octave_idx_type) |
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272 + static_cast<size_t> (capacity ()) * (sizeof (T) + sizeof (octave_idx_type))); |
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273 } |
| 5164 | 274 |
| 275 dim_vector dims (void) const { return dimensions; } | |
| 276 | |
| 277 Sparse<T> squeeze (void) const { return *this; } | |
| 278 | |
| 5275 | 279 octave_idx_type compute_index (const Array<octave_idx_type>& ra_idx) const; |
| 5164 | 280 |
| 5275 | 281 T range_error (const char *fcn, octave_idx_type n) const; |
| 282 T& range_error (const char *fcn, octave_idx_type n); | |
| 5164 | 283 |
| 5275 | 284 T range_error (const char *fcn, octave_idx_type i, octave_idx_type j) const; |
| 285 T& range_error (const char *fcn, octave_idx_type i, octave_idx_type j); | |
| 5164 | 286 |
| 5275 | 287 T range_error (const char *fcn, const Array<octave_idx_type>& ra_idx) const; |
| 288 T& range_error (const char *fcn, const Array<octave_idx_type>& ra_idx); | |
| 5164 | 289 |
| 290 // No checking, even for multiple references, ever. | |
| 291 | |
| 5275 | 292 T& xelem (octave_idx_type n) |
| 5164 | 293 { |
| 5275 | 294 octave_idx_type i = n % rows (), j = n / rows(); |
| 5164 | 295 return xelem (i, j); |
| 296 } | |
| 297 | |
| 5275 | 298 T xelem (octave_idx_type n) const |
| 5164 | 299 { |
| 5275 | 300 octave_idx_type i = n % rows (), j = n / rows(); |
| 5164 | 301 return xelem (i, j); |
| 302 } | |
| 303 | |
| 5275 | 304 T& xelem (octave_idx_type i, octave_idx_type j) { return rep->elem (i, j); } |
| 305 T xelem (octave_idx_type i, octave_idx_type j) const { return rep->celem (i, j); } | |
| 5164 | 306 |
| 5275 | 307 T& xelem (const Array<octave_idx_type>& ra_idx) |
| 5164 | 308 { return xelem (compute_index (ra_idx)); } |
| 309 | |
| 5275 | 310 T xelem (const Array<octave_idx_type>& ra_idx) const |
| 5164 | 311 { return xelem (compute_index (ra_idx)); } |
| 312 | |
| 5775 | 313 // FIXME -- would be nice to fix this so that we don't |
| 5164 | 314 // unnecessarily force a copy, but that is not so easy, and I see no |
| 315 // clean way to do it. | |
| 316 | |
| 5275 | 317 T& checkelem (octave_idx_type n) |
| 5164 | 318 { |
| 319 if (n < 0 || n >= numel ()) | |
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320 return range_error ("T& Sparse<T>::checkelem", n); |
| 5164 | 321 else |
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322 { |
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323 make_unique (); |
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324 return xelem (n); |
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325 } |
| 5164 | 326 } |
| 327 | |
| 5275 | 328 T& checkelem (octave_idx_type i, octave_idx_type j) |
| 5164 | 329 { |
| 330 if (i < 0 || j < 0 || i >= dim1 () || j >= dim2 ()) | |
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331 return range_error ("T& Sparse<T>::checkelem", i, j); |
| 5164 | 332 else |
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333 { |
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334 make_unique (); |
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335 return xelem (i, j); |
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336 } |
| 5164 | 337 } |
| 338 | |
| 5275 | 339 T& checkelem (const Array<octave_idx_type>& ra_idx) |
| 5164 | 340 { |
| 5275 | 341 octave_idx_type i = compute_index (ra_idx); |
| 5164 | 342 |
| 343 if (i < 0) | |
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344 return range_error ("T& Sparse<T>::checkelem", ra_idx); |
| 5164 | 345 else |
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346 return elem (i); |
| 5164 | 347 } |
| 348 | |
| 5275 | 349 T& elem (octave_idx_type n) |
| 5164 | 350 { |
| 351 make_unique (); | |
| 352 return xelem (n); | |
| 353 } | |
| 354 | |
| 5275 | 355 T& elem (octave_idx_type i, octave_idx_type j) |
| 5164 | 356 { |
| 357 make_unique (); | |
| 358 return xelem (i, j); | |
| 359 } | |
| 360 | |
| 5275 | 361 T& elem (const Array<octave_idx_type>& ra_idx) |
| 5164 | 362 { return Sparse<T>::elem (compute_index (ra_idx)); } |
| 363 | |
| 364 #if defined (BOUNDS_CHECKING) | |
| 5275 | 365 T& operator () (octave_idx_type n) { return checkelem (n); } |
| 366 T& operator () (octave_idx_type i, octave_idx_type j) { return checkelem (i, j); } | |
| 367 T& operator () (const Array<octave_idx_type>& ra_idx) { return checkelem (ra_idx); } | |
| 5164 | 368 #else |
| 5275 | 369 T& operator () (octave_idx_type n) { return elem (n); } |
| 370 T& operator () (octave_idx_type i, octave_idx_type j) { return elem (i, j); } | |
| 371 T& operator () (const Array<octave_idx_type>& ra_idx) { return elem (ra_idx); } | |
| 5164 | 372 #endif |
| 373 | |
| 5275 | 374 T checkelem (octave_idx_type n) const |
| 5164 | 375 { |
| 376 if (n < 0 || n >= numel ()) | |
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377 return range_error ("T Sparse<T>::checkelem", n); |
| 5164 | 378 else |
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379 return xelem (n); |
| 5164 | 380 } |
| 381 | |
| 5275 | 382 T checkelem (octave_idx_type i, octave_idx_type j) const |
| 5164 | 383 { |
| 384 if (i < 0 || j < 0 || i >= dim1 () || j >= dim2 ()) | |
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385 return range_error ("T Sparse<T>::checkelem", i, j); |
| 5164 | 386 else |
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387 return xelem (i, j); |
| 5164 | 388 } |
| 389 | |
| 5275 | 390 T checkelem (const Array<octave_idx_type>& ra_idx) const |
| 5164 | 391 { |
| 5275 | 392 octave_idx_type i = compute_index (ra_idx); |
| 5164 | 393 |
| 394 if (i < 0) | |
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395 return range_error ("T Sparse<T>::checkelem", ra_idx); |
| 5164 | 396 else |
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397 return Sparse<T>::elem (i); |
| 5164 | 398 } |
| 399 | |
| 5275 | 400 T elem (octave_idx_type n) const { return xelem (n); } |
| 5164 | 401 |
| 5275 | 402 T elem (octave_idx_type i, octave_idx_type j) const { return xelem (i, j); } |
| 5164 | 403 |
| 5275 | 404 T elem (const Array<octave_idx_type>& ra_idx) const |
| 5164 | 405 { return Sparse<T>::elem (compute_index (ra_idx)); } |
| 406 | |
| 407 #if defined (BOUNDS_CHECKING) | |
| 5275 | 408 T operator () (octave_idx_type n) const { return checkelem (n); } |
| 409 T operator () (octave_idx_type i, octave_idx_type j) const { return checkelem (i, j); } | |
| 410 T operator () (const Array<octave_idx_type>& ra_idx) const { return checkelem (ra_idx); } | |
| 5164 | 411 #else |
| 5275 | 412 T operator () (octave_idx_type n) const { return elem (n); } |
| 413 T operator () (octave_idx_type i, octave_idx_type j) const { return elem (i, j); } | |
| 414 T operator () (const Array<octave_idx_type>& ra_idx) const { return elem (ra_idx); } | |
| 5164 | 415 #endif |
| 416 | |
| 417 Sparse<T> maybe_compress (bool remove_zeros = false) | |
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418 { |
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419 if (remove_zeros) |
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420 make_unique (); // Needs to unshare because elements are removed. |
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421 |
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422 rep->maybe_compress (remove_zeros); |
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423 return (*this); |
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424 } |
| 5164 | 425 |
| 426 Sparse<T> reshape (const dim_vector& new_dims) const; | |
| 427 | |
| 5275 | 428 Sparse<T> permute (const Array<octave_idx_type>& vec, bool inv = false) const; |
| 5164 | 429 |
| 5275 | 430 Sparse<T> ipermute (const Array<octave_idx_type>& vec) const |
| 5164 | 431 { return permute (vec, true); } |
| 432 | |
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433 void resize1 (octave_idx_type n); |
| 5164 | 434 |
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435 void resize (octave_idx_type r, octave_idx_type c); |
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436 |
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437 void resize (const dim_vector& dv); |
| 5164 | 438 |
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439 void change_capacity (octave_idx_type nz) |
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440 { |
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441 if (nz < nnz ()) |
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442 make_unique (); // Unshare now because elements will be truncated. |
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443 rep->change_length (nz); |
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444 } |
| 5164 | 445 |
| 5275 | 446 Sparse<T>& insert (const Sparse<T>& a, octave_idx_type r, octave_idx_type c); |
| 447 Sparse<T>& insert (const Sparse<T>& a, const Array<octave_idx_type>& idx); | |
| 5164 | 448 |
| 449 bool is_square (void) const { return (dim1 () == dim2 ()); } | |
| 450 | |
| 451 bool is_empty (void) const { return (rows () < 1 && cols () < 1); } | |
| 452 | |
| 453 Sparse<T> transpose (void) const; | |
| 454 | |
| 455 T* data (void) { make_unique (); return rep->d; } | |
| 5275 | 456 T& data (octave_idx_type i) { make_unique (); return rep->data (i); } |
| 5164 | 457 T* xdata (void) { return rep->d; } |
| 5275 | 458 T& xdata (octave_idx_type i) { return rep->data (i); } |
| 5164 | 459 |
| 5275 | 460 T data (octave_idx_type i) const { return rep->data (i); } |
| 5900 | 461 // FIXME -- shouldn't this be returning const T*? |
| 5164 | 462 T* data (void) const { return rep->d; } |
| 463 | |
| 5275 | 464 octave_idx_type* ridx (void) { make_unique (); return rep->r; } |
| 465 octave_idx_type& ridx (octave_idx_type i) { make_unique (); return rep->ridx (i); } | |
| 466 octave_idx_type* xridx (void) { return rep->r; } | |
| 467 octave_idx_type& xridx (octave_idx_type i) { return rep->ridx (i); } | |
| 5164 | 468 |
| 5275 | 469 octave_idx_type ridx (octave_idx_type i) const { return rep->cridx (i); } |
| 5900 | 470 // FIXME -- shouldn't this be returning const octave_idx_type*? |
| 5275 | 471 octave_idx_type* ridx (void) const { return rep->r; } |
| 5164 | 472 |
| 5275 | 473 octave_idx_type* cidx (void) { make_unique (); return rep->c; } |
| 474 octave_idx_type& cidx (octave_idx_type i) { make_unique (); return rep->cidx (i); } | |
| 475 octave_idx_type* xcidx (void) { return rep->c; } | |
| 476 octave_idx_type& xcidx (octave_idx_type i) { return rep->cidx (i); } | |
| 5164 | 477 |
| 5275 | 478 octave_idx_type cidx (octave_idx_type i) const { return rep->ccidx (i); } |
| 5900 | 479 // FIXME -- shouldn't this be returning const octave_idx_type*? |
| 5275 | 480 octave_idx_type* cidx (void) const { return rep->c; } |
| 5164 | 481 |
| 5275 | 482 octave_idx_type ndims (void) const { return dimensions.length (); } |
| 5164 | 483 |
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484 void delete_elements (const idx_vector& i); |
| 5164 | 485 |
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486 void delete_elements (int dim, const idx_vector& i); |
| 5164 | 487 |
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488 void delete_elements (const idx_vector& i, const idx_vector& j); |
| 5164 | 489 |
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490 Sparse<T> index (const idx_vector& i, bool resize_ok = false) const; |
| 5164 | 491 |
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492 Sparse<T> index (const idx_vector& i, const idx_vector& j, bool resize_ok = false) const; |
| 5164 | 493 |
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494 void assign (const idx_vector& i, const Sparse<T>& rhs); |
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495 |
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496 void assign (const idx_vector& i, const idx_vector& j, const Sparse<T>& rhs); |
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497 |
| 5164 | 498 void print_info (std::ostream& os, const std::string& prefix) const; |
| 499 | |
| 5900 | 500 // Unsafe. These functions exist to support the MEX interface. |
| 501 // You should not use them anywhere else. | |
| 502 void *mex_get_data (void) const { return const_cast<T *> (data ()); } | |
| 503 | |
| 504 octave_idx_type *mex_get_ir (void) const { return const_cast<octave_idx_type *> (ridx ()); } | |
| 505 | |
| 506 octave_idx_type *mex_get_jc (void) const { return const_cast<octave_idx_type *> (cidx ()); } | |
| 7433 | 507 |
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508 Sparse<T> sort (octave_idx_type dim = 0, sortmode mode = ASCENDING) const; |
| 7433 | 509 Sparse<T> sort (Array<octave_idx_type> &sidx, octave_idx_type dim = 0, |
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510 sortmode mode = ASCENDING) const; |
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511 |
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512 Sparse<T> diag (octave_idx_type k = 0) const; |
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513 |
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514 Array<T> array_value (void) const; |
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515 |
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516 template <class U, class F> |
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517 Sparse<U> |
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518 map (F fcn) const |
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519 { |
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520 Sparse<U> result; |
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521 U f_zero = fcn (0.); |
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522 |
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523 if (f_zero != 0.) |
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524 { |
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525 octave_idx_type nr = rows (); |
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526 octave_idx_type nc = cols (); |
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527 |
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528 result = Sparse<U> (nr, nc, f_zero); |
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529 |
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530 for (octave_idx_type j = 0; j < nc; j++) |
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531 for (octave_idx_type i = cidx(j); i < cidx (j+1); i++) |
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532 { |
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533 octave_quit (); |
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534 /* Use data instead of elem for better performance. */ |
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535 result.data (ridx (i) + j * nr) = fcn (data(i)); |
|
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536 } |
|
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|
537 |
|
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538 result.maybe_compress (true); |
|
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539 } |
|
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|
540 else |
|
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|
541 { |
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542 octave_idx_type nz = nnz (); |
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543 octave_idx_type nr = rows (); |
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544 octave_idx_type nc = cols (); |
|
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|
545 |
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546 result = Sparse<U> (nr, nc, nz); |
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547 octave_idx_type ii = 0; |
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548 result.cidx (ii) = 0; |
|
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549 |
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550 for (octave_idx_type j = 0; j < nc; j++) |
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551 { |
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552 for (octave_idx_type i = cidx(j); i < cidx (j+1); i++) |
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553 { |
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554 U val = fcn (data (i)); |
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555 if (val != 0.0) |
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|
556 { |
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557 result.data (ii) = val; |
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558 result.ridx (ii++) = ridx (i); |
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559 } |
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560 octave_quit (); |
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561 } |
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562 result.cidx (j+1) = ii; |
|
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563 } |
|
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|
564 |
|
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565 result.maybe_compress (false); |
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|
566 } |
|
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567 |
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568 return result; |
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569 } |
|
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570 |
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571 // Overloads for function references. |
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572 template <class U> |
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573 Sparse<U> |
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574 map (U (&fcn) (T)) const |
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575 { return map<U, U (&) (T)> (fcn); } |
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576 |
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577 template <class U> |
|
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578 Sparse<U> |
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579 map (U (&fcn) (const T&)) const |
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580 { return map<U, U (&) (const T&)> (fcn); } |
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581 |
|
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|
582 bool indices_ok (void) const { return rep->indices_ok (); } |
| 5164 | 583 }; |
| 584 | |
| 585 // NOTE: these functions should be friends of the Sparse<T> class and | |
| 586 // Sparse<T>::dimensions should be protected, not public, but we can't | |
| 587 // do that because of bugs in gcc prior to 3.3. | |
| 588 | |
| 589 template <class LT, class RT> | |
| 590 /* friend */ int | |
| 591 assign (Sparse<LT>& lhs, const Sparse<RT>& rhs); | |
| 592 | |
| 593 template <class LT, class RT> | |
| 594 /* friend */ int | |
| 595 assign1 (Sparse<LT>& lhs, const Sparse<RT>& rhs); | |
| 596 | |
|
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597 template<typename T> |
|
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|
598 std::istream& |
|
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|
599 read_sparse_matrix (std::istream& is, Sparse<T>& a, |
|
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600 T (*read_fcn) (std::istream&)) |
|
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601 { |
|
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602 octave_idx_type nr = a.rows (); |
|
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|
603 octave_idx_type nc = a.cols (); |
|
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|
604 octave_idx_type nz = a.nzmax (); |
|
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diff
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|
605 |
|
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|
606 if (nr > 0 && nc > 0) |
|
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|
607 { |
|
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diff
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|
608 octave_idx_type itmp; |
|
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sanity checks for loading sparse matrices
John W. Eaton <jwe@octave.org>
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diff
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|
609 octave_idx_type jtmp; |
|
c6edba80dfae
sanity checks for loading sparse matrices
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diff
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|
610 octave_idx_type iold = 0; |
|
c6edba80dfae
sanity checks for loading sparse matrices
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|
611 octave_idx_type jold = 0; |
|
c6edba80dfae
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diff
changeset
|
612 octave_idx_type ii = 0; |
|
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sanity checks for loading sparse matrices
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diff
changeset
|
613 T tmp; |
|
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diff
changeset
|
614 |
|
c6edba80dfae
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diff
changeset
|
615 a.cidx (0) = 0; |
|
c6edba80dfae
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diff
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|
616 for (octave_idx_type i = 0; i < nz; i++) |
|
10312
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|
617 { |
|
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|
618 itmp = 0; jtmp = 0; |
|
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diff
changeset
|
619 is >> itmp; |
|
cbc402e64d83
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diff
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|
620 itmp--; |
|
9469
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diff
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|
621 |
|
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diff
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|
622 is >> jtmp; |
|
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diff
changeset
|
623 jtmp--; |
|
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diff
changeset
|
624 |
|
10312
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diff
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|
625 if (itmp < 0 || itmp >= nr) |
|
cbc402e64d83
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diff
changeset
|
626 { |
|
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diff
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|
627 (*current_liboctave_error_handler) |
|
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diff
changeset
|
628 ("invalid sparse matrix: row index = %d out of range", |
|
cbc402e64d83
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diff
changeset
|
629 itmp + 1); |
|
cbc402e64d83
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|
630 is.setstate (std::ios::failbit); |
|
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diff
changeset
|
631 goto done; |
|
cbc402e64d83
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diff
changeset
|
632 } |
|
9469
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diff
changeset
|
633 |
|
10312
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changeset
|
634 if (jtmp < 0 || jtmp >= nc) |
|
cbc402e64d83
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diff
changeset
|
635 { |
|
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diff
changeset
|
636 (*current_liboctave_error_handler) |
|
cbc402e64d83
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diff
changeset
|
637 ("invalid sparse matrix: column index = %d out of range", |
|
cbc402e64d83
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diff
changeset
|
638 jtmp + 1); |
|
cbc402e64d83
untabify liboctave header files
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diff
changeset
|
639 is.setstate (std::ios::failbit); |
|
cbc402e64d83
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diff
changeset
|
640 goto done; |
|
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diff
changeset
|
641 } |
|
9469
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sanity checks for loading sparse matrices
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diff
changeset
|
642 |
|
10312
cbc402e64d83
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diff
changeset
|
643 if (jtmp < jold) |
|
cbc402e64d83
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10158
diff
changeset
|
644 { |
|
cbc402e64d83
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10158
diff
changeset
|
645 (*current_liboctave_error_handler) |
|
cbc402e64d83
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diff
changeset
|
646 ("invalid sparse matrix: column indices must appear in ascending order"); |
|
cbc402e64d83
untabify liboctave header files
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diff
changeset
|
647 is.setstate (std::ios::failbit); |
|
cbc402e64d83
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John W. Eaton <jwe@octave.org>
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diff
changeset
|
648 goto done; |
|
cbc402e64d83
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diff
changeset
|
649 } |
|
9829
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diff
changeset
|
650 else if (jtmp > jold) |
|
8fd88cc36fa4
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diff
changeset
|
651 { |
|
8fd88cc36fa4
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Jaroslav Hajek <highegg@gmail.com>
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9812
diff
changeset
|
652 for (octave_idx_type j = jold; j < jtmp; j++) |
|
8fd88cc36fa4
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diff
changeset
|
653 a.cidx(j+1) = ii; |
|
8fd88cc36fa4
fix loading sparse matrices
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diff
changeset
|
654 } |
|
8fd88cc36fa4
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diff
changeset
|
655 else if (itmp < iold) |
|
10312
cbc402e64d83
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diff
changeset
|
656 { |
|
cbc402e64d83
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diff
changeset
|
657 (*current_liboctave_error_handler) |
|
cbc402e64d83
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diff
changeset
|
658 ("invalid sparse matrix: row indices must appear in ascending order in each column"); |
|
cbc402e64d83
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diff
changeset
|
659 is.setstate (std::ios::failbit); |
|
cbc402e64d83
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diff
changeset
|
660 goto done; |
|
cbc402e64d83
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10158
diff
changeset
|
661 } |
|
9829
8fd88cc36fa4
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diff
changeset
|
662 |
|
10312
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diff
changeset
|
663 iold = itmp; |
|
9829
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diff
changeset
|
664 jold = jtmp; |
|
8fd88cc36fa4
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diff
changeset
|
665 |
|
10312
cbc402e64d83
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diff
changeset
|
666 tmp = read_fcn (is); |
|
cbc402e64d83
untabify liboctave header files
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667 |
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cbc402e64d83
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668 if (is) |
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parents:
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diff
changeset
|
669 { |
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|
670 a.data (ii) = tmp; |
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parents:
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671 a.ridx (ii++) = itmp; |
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diff
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672 } |
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673 else |
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cbc402e64d83
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674 goto done; |
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cbc402e64d83
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parents:
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diff
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675 } |
|
9469
c6edba80dfae
sanity checks for loading sparse matrices
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parents:
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diff
changeset
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676 |
|
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parents:
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diff
changeset
|
677 for (octave_idx_type j = jold; j < nc; j++) |
|
10312
cbc402e64d83
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678 a.cidx(j+1) = ii; |
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9469
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679 } |
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c6edba80dfae
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diff
changeset
|
680 |
|
c6edba80dfae
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parents:
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diff
changeset
|
681 done: |
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c6edba80dfae
sanity checks for loading sparse matrices
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parents:
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diff
changeset
|
682 |
|
c6edba80dfae
sanity checks for loading sparse matrices
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parents:
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diff
changeset
|
683 return is; |
|
c6edba80dfae
sanity checks for loading sparse matrices
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parents:
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diff
changeset
|
684 } |
|
c6edba80dfae
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diff
changeset
|
685 |
| 5164 | 686 #endif |