Mercurial > hg > octave-nkf
annotate src/ov-range.cc @ 8971:967a692ddfe2
fix range arithmetics
| author | Jaroslav Hajek <highegg@gmail.com> |
|---|---|
| date | Fri, 13 Mar 2009 12:18:50 +0100 |
| parents | e7e928088e90 |
| children | a48c500e48e1 |
| rev | line source |
|---|---|
| 2376 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 1998, 2000, 2002, 2003, 2004, 2005, 2006, |
| 8920 | 4 2007, 2008 John W. Eaton |
| 2376 | 5 |
| 6 This file is part of Octave. | |
| 7 | |
| 8 Octave is free software; you can redistribute it and/or modify it | |
| 9 under the terms of the GNU General Public License as published by the | |
| 7016 | 10 Free Software Foundation; either version 3 of the License, or (at your |
| 11 option) any later version. | |
| 2376 | 12 |
| 13 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 7016 | 19 along with Octave; see the file COPYING. If not, see |
| 20 <http://www.gnu.org/licenses/>. | |
| 2376 | 21 |
| 22 */ | |
| 23 | |
| 24 #ifdef HAVE_CONFIG_H | |
| 25 #include <config.h> | |
| 26 #endif | |
| 27 | |
| 3503 | 28 #include <iostream> |
| 2901 | 29 |
| 2376 | 30 #include "lo-ieee.h" |
| 31 #include "lo-utils.h" | |
| 32 | |
| 33 #include "gripes.h" | |
| 34 #include "ops.h" | |
| 3933 | 35 #include "oct-obj.h" |
| 2376 | 36 #include "ov-range.h" |
| 37 #include "ov-re-mat.h" | |
| 2410 | 38 #include "ov-scalar.h" |
| 2376 | 39 #include "pr-output.h" |
| 40 | |
| 4687 | 41 #include "byte-swap.h" |
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42 #include "ls-ascii-helper.h" |
| 4687 | 43 #include "ls-hdf5.h" |
| 44 #include "ls-utils.h" | |
| 45 | |
| 3219 | 46 DEFINE_OCTAVE_ALLOCATOR (octave_range); |
| 2376 | 47 |
| 4612 | 48 DEFINE_OV_TYPEID_FUNCTIONS_AND_DATA (octave_range, "range", "double"); |
| 2376 | 49 |
| 5759 | 50 static octave_base_value * |
| 51 default_numeric_conversion_function (const octave_base_value& a) | |
| 2376 | 52 { |
| 53 CAST_CONV_ARG (const octave_range&); | |
| 54 | |
| 55 return new octave_matrix (v.matrix_value ()); | |
| 56 } | |
| 57 | |
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58 octave_base_value::type_conv_info |
| 2376 | 59 octave_range::numeric_conversion_function (void) const |
| 60 { | |
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61 return octave_base_value::type_conv_info (default_numeric_conversion_function, |
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62 octave_matrix::static_type_id ()); |
| 2376 | 63 } |
| 64 | |
| 5759 | 65 octave_base_value * |
| 2410 | 66 octave_range::try_narrowing_conversion (void) |
| 67 { | |
| 5759 | 68 octave_base_value *retval = 0; |
| 2410 | 69 |
| 70 switch (range.nelem ()) | |
| 71 { | |
| 72 case 1: | |
| 73 retval = new octave_scalar (range.base ()); | |
| 74 break; | |
| 75 | |
| 76 case 0: | |
| 4417 | 77 retval = new octave_matrix (Matrix (1, 0)); |
| 2410 | 78 break; |
| 79 | |
| 8971 | 80 case -2: |
| 81 retval = new octave_matrix (range.matrix_value ()); | |
| 82 break; | |
| 83 | |
| 2410 | 84 default: |
| 85 break; | |
| 86 } | |
| 87 | |
| 88 return retval; | |
| 89 } | |
| 90 | |
| 2436 | 91 octave_value |
| 4247 | 92 octave_range::subsref (const std::string& type, |
| 4219 | 93 const std::list<octave_value_list>& idx) |
| 3933 | 94 { |
| 95 octave_value retval; | |
| 96 | |
| 97 switch (type[0]) | |
| 98 { | |
| 99 case '(': | |
| 100 retval = do_index_op (idx.front ()); | |
| 101 break; | |
| 102 | |
| 103 case '{': | |
| 104 case '.': | |
| 105 { | |
| 106 std::string nm = type_name (); | |
| 107 error ("%s cannot be indexed with %c", nm.c_str (), type[0]); | |
| 108 } | |
| 109 break; | |
| 110 | |
| 111 default: | |
| 112 panic_impossible (); | |
| 113 } | |
| 114 | |
| 115 return retval.next_subsref (type, idx); | |
| 116 } | |
| 117 | |
| 118 octave_value | |
| 5885 | 119 octave_range::do_index_op (const octave_value_list& idx, bool resize_ok) |
| 2436 | 120 { |
| 5775 | 121 // FIXME -- this doesn't solve the problem of |
| 2436 | 122 // |
| 123 // a = 1:5; a(1, 1, 1) | |
| 124 // | |
| 125 // and similar constructions. Hmm... | |
| 126 | |
| 5775 | 127 // FIXME -- using this constructor avoids possibly narrowing |
| 2436 | 128 // the range to a scalar value. Need a better solution to this |
| 129 // problem. | |
| 130 | |
| 131 octave_value tmp (new octave_matrix (range.matrix_value ())); | |
| 132 | |
| 3933 | 133 return tmp.do_index_op (idx, resize_ok); |
| 2436 | 134 } |
| 135 | |
| 2376 | 136 double |
| 137 octave_range::double_value (bool) const | |
| 138 { | |
| 4102 | 139 double retval = lo_ieee_nan_value (); |
| 2376 | 140 |
| 5275 | 141 octave_idx_type nel = range.nelem (); |
| 2376 | 142 |
| 4455 | 143 if (nel > 0) |
| 144 { | |
| 5781 | 145 gripe_implicit_conversion ("Octave:array-as-scalar", |
| 146 "range", "real scalar"); | |
| 4455 | 147 |
| 148 retval = range.base (); | |
| 149 } | |
| 2376 | 150 else |
| 151 gripe_invalid_conversion ("range", "real scalar"); | |
| 152 | |
| 153 return retval; | |
| 154 } | |
| 155 | |
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156 float |
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157 octave_range::float_value (bool) const |
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158 { |
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159 float retval = lo_ieee_float_nan_value (); |
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160 |
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161 octave_idx_type nel = range.nelem (); |
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162 |
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163 if (nel > 0) |
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164 { |
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165 gripe_implicit_conversion ("Octave:array-as-scalar", |
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166 "range", "real scalar"); |
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167 |
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168 retval = range.base (); |
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169 } |
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170 else |
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171 gripe_invalid_conversion ("range", "real scalar"); |
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172 |
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173 return retval; |
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174 } |
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175 |
| 2376 | 176 octave_value |
| 4017 | 177 octave_range::all (int dim) const |
| 2376 | 178 { |
| 5775 | 179 // FIXME -- this is a potential waste of memory. |
| 2436 | 180 |
| 181 Matrix m = range.matrix_value (); | |
| 182 | |
| 4017 | 183 return m.all (dim); |
| 2376 | 184 } |
| 185 | |
| 186 octave_value | |
| 4017 | 187 octave_range::any (int dim) const |
| 2376 | 188 { |
| 5775 | 189 // FIXME -- this is a potential waste of memory. |
| 4017 | 190 |
| 191 Matrix m = range.matrix_value (); | |
| 192 | |
| 193 return m.any (dim); | |
| 2376 | 194 } |
| 195 | |
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196 octave_value |
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197 octave_range::diag (octave_idx_type k) const |
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198 { |
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199 return (k == 0 |
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200 ? octave_value (DiagMatrix (DiagArray2<double> (range.matrix_value ()))) |
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201 : octave_value (range.diag (k))); |
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202 } |
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203 |
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204 |
| 2376 | 205 bool |
| 206 octave_range::is_true (void) const | |
| 207 { | |
| 208 bool retval = false; | |
| 2436 | 209 |
| 4478 | 210 if (range.nelem () != 0) |
| 2436 | 211 { |
| 5775 | 212 // FIXME -- this is a potential waste of memory. |
| 2436 | 213 |
| 214 Matrix m ((range.matrix_value () . all ()) . all ()); | |
| 215 | |
| 216 retval = (m.rows () == 1 && m.columns () == 1 && m (0, 0) != 0.0); | |
| 217 } | |
| 218 | |
| 2376 | 219 return retval; |
| 220 } | |
| 221 | |
| 222 Complex | |
| 223 octave_range::complex_value (bool) const | |
| 224 { | |
| 4102 | 225 double tmp = lo_ieee_nan_value (); |
| 226 | |
| 227 Complex retval (tmp, tmp); | |
| 2376 | 228 |
| 5275 | 229 octave_idx_type nel = range.nelem (); |
| 2376 | 230 |
| 4455 | 231 if (nel > 0) |
| 232 { | |
| 5781 | 233 gripe_implicit_conversion ("Octave:array-as-scalar", |
| 234 "range", "complex scalar"); | |
| 4455 | 235 |
| 236 retval = range.base (); | |
| 237 } | |
| 2376 | 238 else |
| 239 gripe_invalid_conversion ("range", "complex scalar"); | |
| 240 | |
| 241 return retval; | |
| 242 } | |
| 243 | |
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244 FloatComplex |
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245 octave_range::float_complex_value (bool) const |
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246 { |
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247 float tmp = lo_ieee_float_nan_value (); |
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248 |
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249 FloatComplex retval (tmp, tmp); |
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250 |
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251 octave_idx_type nel = range.nelem (); |
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252 |
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253 if (nel > 0) |
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254 { |
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255 gripe_implicit_conversion ("Octave:array-as-scalar", |
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256 "range", "complex scalar"); |
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257 |
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258 retval = range.base (); |
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259 } |
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260 else |
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261 gripe_invalid_conversion ("range", "complex scalar"); |
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262 |
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263 return retval; |
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264 } |
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265 |
| 5731 | 266 octave_value |
| 267 octave_range::resize (const dim_vector& dv, bool fill) const | |
| 268 { | |
| 269 NDArray retval = array_value (); | |
| 270 if (fill) | |
| 271 retval.resize (dv, NDArray::resize_fill_value()); | |
| 272 else | |
| 273 retval.resize (dv); | |
| 274 return retval; | |
| 275 } | |
| 276 | |
| 2376 | 277 octave_value |
| 5279 | 278 octave_range::convert_to_str_internal (bool pad, bool force, char type) const |
| 2449 | 279 { |
| 280 octave_value tmp (range.matrix_value ()); | |
| 5279 | 281 return tmp.convert_to_str (pad, force, type); |
| 2449 | 282 } |
| 283 | |
| 2376 | 284 void |
| 3523 | 285 octave_range::print (std::ostream& os, bool pr_as_read_syntax) const |
| 2901 | 286 { |
| 287 print_raw (os, pr_as_read_syntax); | |
| 288 newline (os); | |
| 289 } | |
| 290 | |
| 291 void | |
| 3523 | 292 octave_range::print_raw (std::ostream& os, bool pr_as_read_syntax) const |
| 2901 | 293 { |
| 294 octave_print_internal (os, range, pr_as_read_syntax, | |
| 295 current_print_indent_level ()); | |
| 296 } | |
| 297 | |
| 298 bool | |
| 3523 | 299 octave_range::print_name_tag (std::ostream& os, const std::string& name) const |
| 2376 | 300 { |
| 2901 | 301 bool retval = false; |
| 302 | |
| 5275 | 303 octave_idx_type n = range.nelem (); |
| 2901 | 304 |
| 305 indent (os); | |
| 306 | |
| 307 if (n == 0 || n == 1) | |
| 308 os << name << " = "; | |
| 309 else | |
| 310 { | |
| 311 os << name << " ="; | |
| 312 newline (os); | |
| 313 newline (os); | |
| 314 retval = true; | |
| 315 } | |
| 316 | |
| 317 return retval; | |
| 2376 | 318 } |
| 319 | |
| 4687 | 320 // Skip white space and comments on stream IS. |
| 321 | |
| 322 static void | |
| 323 skip_comments (std::istream& is) | |
| 324 { | |
| 325 char c = '\0'; | |
| 326 while (is.get (c)) | |
| 327 { | |
| 328 if (c == ' ' || c == '\t' || c == '\n') | |
| 329 ; // Skip whitespace on way to beginning of next line. | |
| 330 else | |
| 331 break; | |
| 332 } | |
| 333 | |
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334 skip_until_newline (is, false); |
| 4687 | 335 } |
| 336 | |
| 337 bool | |
| 6974 | 338 octave_range::save_ascii (std::ostream& os) |
| 4687 | 339 { |
| 340 Range r = range_value (); | |
| 341 double base = r.base (); | |
| 342 double limit = r.limit (); | |
| 343 double inc = r.inc (); | |
| 344 | |
| 345 os << "# base, limit, increment\n"; | |
| 346 octave_write_double (os, base); | |
| 347 os << " "; | |
| 348 octave_write_double (os, limit); | |
| 349 os << " "; | |
| 350 octave_write_double (os, inc); | |
| 351 os << "\n"; | |
| 352 | |
| 353 return true; | |
| 354 } | |
| 355 | |
| 356 bool | |
| 357 octave_range::load_ascii (std::istream& is) | |
| 358 { | |
| 359 // # base, limit, range comment added by save (). | |
| 360 skip_comments (is); | |
| 361 | |
| 362 is >> range; | |
| 363 | |
| 364 if (!is) | |
| 365 { | |
| 366 error ("load: failed to load range constant"); | |
| 367 return false; | |
| 368 } | |
| 369 | |
| 370 return true; | |
| 371 } | |
| 372 | |
| 373 bool | |
| 374 octave_range::save_binary (std::ostream& os, bool& /* save_as_floats */) | |
| 375 { | |
| 5760 | 376 char tmp = LS_DOUBLE; |
| 377 os.write (reinterpret_cast<char *> (&tmp), 1); | |
| 4687 | 378 Range r = range_value (); |
| 379 double bas = r.base (); | |
| 380 double lim = r.limit (); | |
| 381 double inc = r.inc (); | |
| 5760 | 382 os.write (reinterpret_cast<char *> (&bas), 8); |
| 383 os.write (reinterpret_cast<char *> (&lim), 8); | |
| 384 os.write (reinterpret_cast<char *> (&inc), 8); | |
| 4687 | 385 |
| 386 return true; | |
| 387 } | |
| 388 | |
| 389 bool | |
| 390 octave_range::load_binary (std::istream& is, bool swap, | |
| 391 oct_mach_info::float_format /* fmt */) | |
| 392 { | |
| 393 char tmp; | |
| 5760 | 394 if (! is.read (reinterpret_cast<char *> (&tmp), 1)) |
| 4687 | 395 return false; |
| 396 double bas, lim, inc; | |
| 5760 | 397 if (! is.read (reinterpret_cast<char *> (&bas), 8)) |
| 4687 | 398 return false; |
| 399 if (swap) | |
| 4944 | 400 swap_bytes<8> (&bas); |
| 5760 | 401 if (! is.read (reinterpret_cast<char *> (&lim), 8)) |
| 4687 | 402 return false; |
| 403 if (swap) | |
| 4944 | 404 swap_bytes<8> (&lim); |
| 5760 | 405 if (! is.read (reinterpret_cast<char *> (&inc), 8)) |
| 4687 | 406 return false; |
| 407 if (swap) | |
| 4944 | 408 swap_bytes<8> (&inc); |
| 4687 | 409 Range r (bas, lim, inc); |
| 410 range = r; | |
| 411 return true; | |
| 412 } | |
| 413 | |
| 414 #if defined (HAVE_HDF5) | |
| 4944 | 415 |
| 4687 | 416 // The following subroutines creates an HDF5 representation of the way |
| 417 // we will store Octave range types (triplets of floating-point numbers). | |
| 418 // NUM_TYPE is the HDF5 numeric type to use for storage (e.g. | |
| 419 // H5T_NATIVE_DOUBLE to save as 'double'). Note that any necessary | |
| 420 // conversions are handled automatically by HDF5. | |
| 421 | |
| 422 static hid_t | |
| 423 hdf5_make_range_type (hid_t num_type) | |
| 424 { | |
| 425 hid_t type_id = H5Tcreate (H5T_COMPOUND, sizeof (double) * 3); | |
| 426 | |
| 427 H5Tinsert (type_id, "base", 0 * sizeof (double), num_type); | |
| 428 H5Tinsert (type_id, "limit", 1 * sizeof (double), num_type); | |
| 429 H5Tinsert (type_id, "increment", 2 * sizeof (double), num_type); | |
| 430 | |
| 431 return type_id; | |
| 432 } | |
| 433 | |
| 434 bool | |
| 435 octave_range::save_hdf5 (hid_t loc_id, const char *name, | |
| 436 bool /* save_as_floats */) | |
| 437 { | |
| 4792 | 438 hsize_t dimens[3]; |
| 4687 | 439 hid_t space_hid = -1, type_hid = -1, data_hid = -1; |
| 440 bool retval = true; | |
| 441 | |
| 4815 | 442 space_hid = H5Screate_simple (0, dimens, 0); |
| 4687 | 443 if (space_hid < 0) return false; |
| 444 | |
| 445 type_hid = hdf5_make_range_type (H5T_NATIVE_DOUBLE); | |
| 446 if (type_hid < 0) | |
| 447 { | |
| 448 H5Sclose (space_hid); | |
| 449 return false; | |
| 450 } | |
| 451 | |
| 452 data_hid = H5Dcreate (loc_id, name, type_hid, space_hid, H5P_DEFAULT); | |
| 453 if (data_hid < 0) | |
| 454 { | |
| 455 H5Sclose (space_hid); | |
| 456 H5Tclose (type_hid); | |
| 457 return false; | |
| 458 } | |
| 459 | |
| 460 Range r = range_value (); | |
| 461 double range_vals[3]; | |
| 462 range_vals[0] = r.base (); | |
| 463 range_vals[1] = r.limit (); | |
| 464 range_vals[2] = r.inc (); | |
| 465 | |
| 466 retval = H5Dwrite (data_hid, type_hid, H5S_ALL, H5S_ALL, H5P_DEFAULT, | |
| 4815 | 467 range_vals) >= 0; |
| 4687 | 468 |
| 469 H5Dclose (data_hid); | |
| 470 H5Tclose (type_hid); | |
| 471 H5Sclose (space_hid); | |
| 4837 | 472 |
| 4687 | 473 return retval; |
| 474 } | |
| 475 | |
| 476 bool | |
| 477 octave_range::load_hdf5 (hid_t loc_id, const char *name, | |
| 478 bool /* have_h5giterate_bug */) | |
| 479 { | |
| 480 bool retval = false; | |
| 4837 | 481 |
| 4687 | 482 hid_t data_hid = H5Dopen (loc_id, name); |
| 483 hid_t type_hid = H5Dget_type (data_hid); | |
| 484 | |
| 485 hid_t range_type = hdf5_make_range_type (H5T_NATIVE_DOUBLE); | |
| 486 | |
| 487 if (! hdf5_types_compatible (type_hid, range_type)) | |
| 488 { | |
| 4837 | 489 H5Tclose (range_type); |
| 4687 | 490 H5Dclose (data_hid); |
| 491 return false; | |
| 492 } | |
| 493 | |
| 494 hid_t space_hid = H5Dget_space (data_hid); | |
| 495 hsize_t rank = H5Sget_simple_extent_ndims (space_hid); | |
| 496 | |
| 497 if (rank != 0) | |
| 498 { | |
| 4837 | 499 H5Tclose (range_type); |
| 4687 | 500 H5Sclose (space_hid); |
| 501 H5Dclose (data_hid); | |
| 502 return false; | |
| 503 } | |
| 504 | |
| 505 double rangevals[3]; | |
| 506 if (H5Dread (data_hid, range_type, H5S_ALL, H5S_ALL, H5P_DEFAULT, | |
| 4815 | 507 rangevals) >= 0) |
| 4687 | 508 { |
| 509 retval = true; | |
| 510 Range r (rangevals[0], rangevals[1], rangevals[2]); | |
| 511 range = r; | |
| 512 } | |
| 513 | |
| 4837 | 514 H5Tclose (range_type); |
| 4687 | 515 H5Sclose (space_hid); |
| 516 H5Dclose (data_hid); | |
| 4837 | 517 |
| 4687 | 518 return retval; |
| 519 } | |
| 4944 | 520 |
| 4687 | 521 #endif |
| 522 | |
| 5900 | 523 mxArray * |
| 524 octave_range::as_mxArray (void) const | |
| 525 { | |
| 526 mxArray *retval = new mxArray (mxDOUBLE_CLASS, dims (), mxREAL); | |
| 527 | |
| 528 double *pr = static_cast<double *> (retval->get_data ()); | |
| 529 | |
| 6686 | 530 mwSize nel = numel (); |
| 5900 | 531 |
| 532 Matrix m = matrix_value (); | |
| 533 | |
| 534 const double *p = m.data (); | |
| 535 | |
| 6686 | 536 for (mwSize i = 0; i < nel; i++) |
| 5900 | 537 pr[i] = p[i]; |
| 538 | |
| 539 return retval; | |
| 540 } | |
| 541 | |
| 2376 | 542 /* |
| 543 ;;; Local Variables: *** | |
| 544 ;;; mode: C++ *** | |
| 545 ;;; End: *** | |
| 546 */ |