Mercurial > octave-nkf
annotate src/ls-oct-ascii.cc @ 7961:a5d1e27ee1f4 ss-3-1-51
3.1.51 snapshot
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 22 Jul 2008 11:40:48 -0400 |
| parents | 14b841c47a5f |
| children | 0ef13e15319b |
| rev | line source |
|---|---|
| 4634 | 1 /* |
| 2 | |
| 7017 | 3 Copyright (C) 1996, 1997, 2003, 2004, 2005, 2006, 2007 John W. Eaton |
| 4634 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 4634 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 4634 | 20 |
| 21 */ | |
| 22 | |
| 23 // Author: John W. Eaton. | |
| 24 | |
| 25 #ifdef HAVE_CONFIG_H | |
| 26 #include <config.h> | |
| 27 #endif | |
| 28 | |
| 29 #include <cstring> | |
| 30 #include <cctype> | |
| 31 | |
| 32 #include <fstream> | |
| 33 #include <iomanip> | |
| 34 #include <iostream> | |
| 5765 | 35 #include <sstream> |
| 4634 | 36 #include <string> |
| 37 | |
| 38 #include "byte-swap.h" | |
| 39 #include "data-conv.h" | |
| 40 #include "file-ops.h" | |
| 41 #include "glob-match.h" | |
| 42 #include "lo-mappers.h" | |
| 43 #include "mach-info.h" | |
| 44 #include "oct-env.h" | |
| 45 #include "oct-time.h" | |
| 46 #include "quit.h" | |
| 47 #include "str-vec.h" | |
| 48 | |
| 49 #include "Cell.h" | |
| 50 #include "defun.h" | |
| 51 #include "error.h" | |
| 52 #include "gripes.h" | |
| 53 #include "load-save.h" | |
| 54 #include "oct-obj.h" | |
| 55 #include "oct-map.h" | |
| 56 #include "ov-cell.h" | |
| 57 #include "pager.h" | |
| 58 #include "pt-exp.h" | |
| 59 #include "unwind-prot.h" | |
| 60 #include "utils.h" | |
| 61 #include "variables.h" | |
| 62 #include "version.h" | |
| 63 #include "dMatrix.h" | |
| 64 | |
| 65 #include "ls-oct-ascii.h" | |
| 66 | |
| 67 // The number of decimal digits to use when writing ascii data. | |
| 5951 | 68 static int Vsave_precision = 16; |
| 4634 | 69 |
| 70 // Functions for reading ascii data. | |
| 71 | |
| 72 // Extract a KEYWORD and its value from stream IS, returning the | |
| 73 // associated value in a new string. | |
| 74 // | |
| 75 // Input should look something like: | |
| 76 // | |
| 77 // [%#][ \t]*keyword[ \t]*:[ \t]*string-value[ \t]*\n | |
| 78 | |
| 79 std::string | |
| 4687 | 80 extract_keyword (std::istream& is, const char *keyword, const bool next_only) |
| 4634 | 81 { |
| 82 std::string retval; | |
| 83 | |
|
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84 int ch = is.peek (); |
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85 if (next_only && ch != '%' && ch != '#') |
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86 return retval; |
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87 |
| 4634 | 88 char c; |
| 89 while (is.get (c)) | |
| 90 { | |
| 91 if (c == '%' || c == '#') | |
| 92 { | |
| 5765 | 93 std::ostringstream buf; |
| 4634 | 94 |
| 95 while (is.get (c) && (c == ' ' || c == '\t' || c == '%' || c == '#')) | |
| 96 ; // Skip whitespace and comment characters. | |
| 97 | |
| 98 if (isalpha (c)) | |
| 99 buf << c; | |
| 100 | |
| 101 while (is.get (c) && isalpha (c)) | |
| 102 buf << c; | |
| 103 | |
| 5765 | 104 std::string tmp = buf.str (); |
| 5679 | 105 bool match = (tmp.compare (0, strlen (keyword), keyword) == 0); |
| 4634 | 106 |
| 107 if (match) | |
| 108 { | |
| 5765 | 109 std::ostringstream value; |
| 4634 | 110 while (is.get (c) && (c == ' ' || c == '\t' || c == ':')) |
| 111 ; // Skip whitespace and the colon. | |
| 112 | |
| 113 if (c != '\n') | |
| 114 { | |
| 115 value << c; | |
| 116 while (is.get (c) && c != '\n') | |
| 117 value << c; | |
| 118 } | |
| 5765 | 119 |
| 120 retval = value.str (); | |
| 4634 | 121 break; |
| 122 } | |
| 4687 | 123 else if (next_only) |
| 124 break; | |
| 6202 | 125 else |
| 126 { | |
| 127 while (is.get (c) && c != '\n') | |
| 128 ; // Skip to end of line. | |
| 129 } | |
| 4634 | 130 } |
| 131 } | |
| 132 | |
| 133 int len = retval.length (); | |
| 134 | |
| 135 if (len > 0) | |
| 136 { | |
| 137 while (len) | |
| 138 { | |
| 139 c = retval[len-1]; | |
| 140 | |
| 141 if (c == ' ' || c == '\t') | |
| 142 len--; | |
| 143 else | |
| 144 { | |
| 145 retval.resize (len); | |
| 146 break; | |
| 147 } | |
| 148 } | |
| 149 } | |
| 150 | |
| 151 return retval; | |
| 152 } | |
| 153 | |
| 154 // Extract one value (scalar, matrix, string, etc.) from stream IS and | |
| 155 // place it in TC, returning the name of the variable. If the value | |
| 156 // is tagged as global in the file, return TRUE in GLOBAL. | |
| 157 // | |
| 4687 | 158 // Each type supplies its own function to load the data, and so this |
| 159 // function is extensible. | |
| 160 // | |
| 4634 | 161 // FILENAME is used for error messages. |
| 162 // | |
| 163 // The data is expected to be in the following format: | |
| 164 // | |
| 165 // The input file must have a header followed by some data. | |
| 166 // | |
| 167 // All lines in the header must begin with a `#' character. | |
| 168 // | |
| 169 // The header must contain a list of keyword and value pairs with the | |
| 170 // keyword and value separated by a colon. | |
| 171 // | |
| 172 // Keywords must appear in the following order: | |
| 173 // | |
| 174 // # name: <name> | |
| 175 // # type: <type> | |
| 176 // # <info> | |
| 177 // | |
| 4687 | 178 // Where, for the built in types are: |
| 4634 | 179 // |
| 180 // <name> : a valid identifier | |
| 181 // | |
| 182 // <type> : <typename> | |
| 183 // | global <typename> | |
| 184 // | |
| 185 // <typename> : scalar | |
| 186 // | complex scalar | |
| 187 // | matrix | |
| 188 // | complex matrix | |
| 4687 | 189 // | bool |
| 190 // | bool matrix | |
| 4634 | 191 // | string |
| 192 // | range | |
| 193 // | |
| 194 // <info> : <matrix info> | |
| 195 // | <string info> | |
| 196 // | |
| 197 // <matrix info> : # rows: <integer> | |
| 198 // : # columns: <integer> | |
| 199 // | |
| 4687 | 200 // <string info> : # elements: <integer> |
| 201 // : # length: <integer> (once before each string) | |
| 4634 | 202 // |
| 4687 | 203 // For backward compatibility the type "string array" is treated as a |
| 204 // "string" type. Also "string" can have a single element with no elements | |
| 205 // line such that | |
| 206 // | |
| 207 // <string info> : # length: <integer> | |
| 4634 | 208 // |
| 209 // Formatted ASCII data follows the header. | |
| 210 // | |
| 211 // Example: | |
| 212 // | |
| 213 // # name: foo | |
| 214 // # type: matrix | |
| 215 // # rows: 2 | |
| 216 // # columns: 2 | |
| 217 // 2 4 | |
| 218 // 1 3 | |
| 219 // | |
| 220 // Example: | |
| 221 // | |
| 222 // # name: foo | |
| 4687 | 223 // # type: string |
| 4634 | 224 // # elements: 5 |
| 225 // # length: 4 | |
| 226 // this | |
| 227 // # length: 2 | |
| 228 // is | |
| 229 // # length: 1 | |
| 230 // a | |
| 231 // # length: 6 | |
| 232 // string | |
| 233 // # length: 5 | |
| 234 // array | |
| 235 // | |
| 5775 | 236 // FIXME -- this format is fairly rigid, and doesn't allow for |
| 4687 | 237 // arbitrary comments. Someone should fix that. It does allow arbitrary |
| 238 // types however. | |
| 4634 | 239 |
| 240 // Ugh. The signature of the compare method is not standard in older | |
| 241 // versions of the GNU libstdc++. Do this instead: | |
| 242 | |
| 243 #define SUBSTRING_COMPARE_EQ(s, pos, n, t) (s.substr (pos, n) == t) | |
| 244 | |
| 245 std::string | |
| 246 read_ascii_data (std::istream& is, const std::string& filename, bool& global, | |
| 5754 | 247 octave_value& tc, octave_idx_type count) |
| 4634 | 248 { |
| 249 // Read name for this entry or break on EOF. | |
| 250 | |
| 251 std::string name = extract_keyword (is, "name"); | |
| 252 | |
| 253 if (name.empty ()) | |
| 254 { | |
| 255 if (count == 0) | |
| 256 error ("load: empty name keyword or no data found in file `%s'", | |
| 257 filename.c_str ()); | |
| 258 | |
| 259 return std::string (); | |
| 260 } | |
| 261 | |
|
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parents:
7336
diff
changeset
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262 if (! (name == ".nargin." || name == ".nargout." |
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parents:
7336
diff
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263 || name == CELL_ELT_TAG || valid_identifier (name))) |
| 4634 | 264 { |
| 265 error ("load: bogus identifier `%s' found in file `%s'", | |
| 266 name.c_str (), filename.c_str ()); | |
| 267 return std::string (); | |
| 268 } | |
| 269 | |
| 270 // Look for type keyword. | |
| 271 | |
| 272 std::string tag = extract_keyword (is, "type"); | |
| 273 | |
| 274 if (! tag.empty ()) | |
| 275 { | |
| 276 std::string typ; | |
| 277 size_t pos = tag.rfind (' '); | |
| 278 | |
| 279 if (pos != NPOS) | |
| 280 { | |
| 281 global = SUBSTRING_COMPARE_EQ (tag, 0, 6, "global"); | |
| 282 | |
| 283 typ = global ? tag.substr (7) : tag; | |
| 284 } | |
| 285 else | |
| 286 typ = tag; | |
| 287 | |
| 4687 | 288 // Special case for backward compatiablity. A small bit of cruft |
| 289 if (SUBSTRING_COMPARE_EQ (typ, 0, 12, "string array")) | |
| 290 tc = octave_value (charMatrix (), true); | |
| 291 else | |
| 292 tc = octave_value_typeinfo::lookup_type (typ); | |
| 4634 | 293 |
| 4988 | 294 if (! tc.load_ascii (is)) |
| 295 error ("load: trouble reading ascii file `%s'", filename.c_str ()); | |
| 4634 | 296 } |
| 297 else | |
| 298 error ("load: failed to extract keyword specifying value type"); | |
| 299 | |
| 300 if (error_state) | |
| 301 { | |
| 302 error ("load: reading file %s", filename.c_str ()); | |
| 303 return std::string (); | |
| 304 } | |
| 305 | |
| 306 return name; | |
| 307 } | |
| 308 | |
| 309 // Save the data from TC along with the corresponding NAME, and global | |
| 310 // flag MARK_AS_GLOBAL on stream OS in the plain text format described | |
| 311 // above for load_ascii_data. If NAME is empty, the name: line is not | |
| 312 // generated. PRECISION specifies the number of decimal digits to print. | |
| 313 // | |
| 314 // Assumes ranges and strings cannot contain Inf or NaN values. | |
| 315 // | |
| 316 // Returns 1 for success and 0 for failure. | |
| 317 | |
| 5775 | 318 // FIXME -- should probably write the help string here too. |
| 4634 | 319 |
| 320 bool | |
| 321 save_ascii_data (std::ostream& os, const octave_value& val_arg, | |
| 6974 | 322 const std::string& name, bool mark_as_global, |
| 323 int precision) | |
| 4634 | 324 { |
| 325 bool success = true; | |
| 326 | |
| 327 if (! name.empty ()) | |
| 328 os << "# name: " << name << "\n"; | |
| 329 | |
| 330 octave_value val = val_arg; | |
| 331 | |
| 4687 | 332 if (mark_as_global) |
| 333 os << "# type: global " << val.type_name () << "\n"; | |
| 334 else | |
| 335 os << "# type: " << val.type_name() << "\n"; | |
| 4634 | 336 |
| 5951 | 337 if (! precision) |
| 338 precision = Vsave_precision; | |
| 339 | |
| 340 long old_precision = os.precision (); | |
| 341 os.precision (precision); | |
| 342 | |
| 6974 | 343 success = val.save_ascii (os); |
| 4634 | 344 |
| 345 os.precision (old_precision); | |
| 346 | |
| 347 return (os && success); | |
| 348 } | |
| 349 | |
| 350 bool | |
| 351 save_ascii_data_for_plotting (std::ostream& os, const octave_value& t, | |
| 352 const std::string& name) | |
| 353 { | |
| 6974 | 354 return save_ascii_data (os, t, name, false, 6); |
| 4634 | 355 } |
| 356 | |
| 357 // Maybe this should be a static function in tree-plot.cc? | |
| 358 | |
| 359 // If TC is matrix, save it on stream OS in a format useful for | |
| 360 // making a 3-dimensional plot with gnuplot. If PARAMETRIC is | |
| 361 // TRUE, assume a parametric 3-dimensional plot will be generated. | |
| 362 | |
| 363 bool | |
| 364 save_three_d (std::ostream& os, const octave_value& tc, bool parametric) | |
| 365 { | |
| 366 bool fail = false; | |
| 367 | |
| 5275 | 368 octave_idx_type nr = tc.rows (); |
| 369 octave_idx_type nc = tc.columns (); | |
| 4634 | 370 |
| 371 if (tc.is_real_matrix ()) | |
| 372 { | |
| 373 os << "# 3D data...\n" | |
| 374 << "# type: matrix\n" | |
| 375 << "# total rows: " << nr << "\n" | |
| 376 << "# total columns: " << nc << "\n"; | |
| 377 | |
| 6171 | 378 long old_precision = os.precision (); |
| 6257 | 379 os.precision (6); |
| 6171 | 380 |
| 4634 | 381 if (parametric) |
| 382 { | |
| 5275 | 383 octave_idx_type extras = nc % 3; |
| 4634 | 384 if (extras) |
| 385 warning ("ignoring last %d columns", extras); | |
| 386 | |
| 387 Matrix tmp = tc.matrix_value (); | |
| 388 nr = tmp.rows (); | |
| 389 | |
| 5275 | 390 for (octave_idx_type i = 0; i < nc-extras; i += 3) |
| 4634 | 391 { |
| 392 os << tmp.extract (0, i, nr-1, i+2); | |
| 393 if (i+3 < nc-extras) | |
| 394 os << "\n"; | |
| 395 } | |
| 396 } | |
| 397 else | |
| 398 { | |
| 399 Matrix tmp = tc.matrix_value (); | |
| 400 nr = tmp.rows (); | |
| 401 | |
| 5275 | 402 for (octave_idx_type i = 0; i < nc; i++) |
| 4634 | 403 { |
| 404 os << tmp.extract (0, i, nr-1, i); | |
| 405 if (i+1 < nc) | |
| 406 os << "\n"; | |
| 407 } | |
| 408 } | |
| 6171 | 409 |
| 410 os.precision (old_precision); | |
| 4634 | 411 } |
| 412 else | |
| 413 { | |
| 414 ::error ("for now, I can only save real matrices in 3D format"); | |
| 415 fail = true; | |
| 416 } | |
| 417 | |
| 418 return (os && ! fail); | |
| 419 } | |
| 420 | |
| 5794 | 421 DEFUN (save_precision, args, nargout, |
| 422 "-*- texinfo -*-\n\ | |
| 423 @deftypefn {Built-in Function} {@var{val} =} save_precision ()\n\ | |
| 424 @deftypefnx {Built-in Function} {@var{old_val} =} save_precision (@var{new_val})\n\ | |
| 425 Query or set the internal variable that specifies the number of\n\ | |
| 426 digits to keep when saving data in text format.\n\ | |
| 427 @end deftypefn") | |
| 4634 | 428 { |
| 5794 | 429 return SET_INTERNAL_VARIABLE_WITH_LIMITS (save_precision, -1, INT_MAX); |
| 4634 | 430 } |
| 431 | |
| 432 /* | |
| 433 ;;; Local Variables: *** | |
| 434 ;;; mode: C++ *** | |
| 435 ;;; End: *** | |
| 436 */ | |
| 437 |