Mercurial > hg > octave-lyh
annotate src/ls-oct-ascii.cc @ 9771:4634a0e9ea1b
gnuplot_drawnow.m (gnuplot_default_term): don't set term to x11 unless DISPLAY is set
| author | Stefan Hepp <stefan@stefant.org> |
|---|---|
| date | Mon, 02 Nov 2009 21:34:04 -0500 |
| parents | 34d6f005db4b |
| children | cd96d29c5efa |
| rev | line source |
|---|---|
| 4634 | 1 /* |
| 2 | |
| 8920 | 3 Copyright (C) 1996, 1997, 2003, 2004, 2005, 2006, 2007, 2008 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" | |
|
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54 #include "ls-ascii-helper.h" |
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55 #include "ls-oct-ascii.h" |
| 4634 | 56 #include "oct-obj.h" |
| 57 #include "oct-map.h" | |
| 58 #include "ov-cell.h" | |
| 59 #include "pager.h" | |
| 60 #include "pt-exp.h" | |
| 61 #include "unwind-prot.h" | |
| 62 #include "utils.h" | |
| 63 #include "variables.h" | |
| 64 #include "version.h" | |
| 65 #include "dMatrix.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 | |
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113 is.putback(c); |
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114 retval = read_until_newline (is, false); |
| 4634 | 115 break; |
| 116 } | |
| 4687 | 117 else if (next_only) |
| 118 break; | |
| 6202 | 119 else |
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120 skip_until_newline (is, false); |
| 4634 | 121 } |
| 122 } | |
| 123 | |
| 124 int len = retval.length (); | |
| 125 | |
| 126 if (len > 0) | |
| 127 { | |
| 128 while (len) | |
| 129 { | |
| 130 c = retval[len-1]; | |
| 131 | |
| 132 if (c == ' ' || c == '\t') | |
| 133 len--; | |
| 134 else | |
| 135 { | |
| 136 retval.resize (len); | |
| 137 break; | |
| 138 } | |
| 139 } | |
| 140 } | |
| 141 | |
| 142 return retval; | |
| 143 } | |
| 144 | |
| 145 // Extract one value (scalar, matrix, string, etc.) from stream IS and | |
| 146 // place it in TC, returning the name of the variable. If the value | |
| 147 // is tagged as global in the file, return TRUE in GLOBAL. | |
| 148 // | |
| 4687 | 149 // Each type supplies its own function to load the data, and so this |
| 150 // function is extensible. | |
| 151 // | |
| 4634 | 152 // FILENAME is used for error messages. |
| 153 // | |
| 154 // The data is expected to be in the following format: | |
| 155 // | |
| 156 // The input file must have a header followed by some data. | |
| 157 // | |
| 158 // All lines in the header must begin with a `#' character. | |
| 159 // | |
| 160 // The header must contain a list of keyword and value pairs with the | |
| 161 // keyword and value separated by a colon. | |
| 162 // | |
| 163 // Keywords must appear in the following order: | |
| 164 // | |
| 165 // # name: <name> | |
| 166 // # type: <type> | |
| 167 // # <info> | |
| 168 // | |
| 4687 | 169 // Where, for the built in types are: |
| 4634 | 170 // |
| 171 // <name> : a valid identifier | |
| 172 // | |
| 173 // <type> : <typename> | |
| 174 // | global <typename> | |
| 175 // | |
| 176 // <typename> : scalar | |
| 177 // | complex scalar | |
| 178 // | matrix | |
| 179 // | complex matrix | |
| 4687 | 180 // | bool |
| 181 // | bool matrix | |
| 4634 | 182 // | string |
| 183 // | range | |
| 184 // | |
| 185 // <info> : <matrix info> | |
| 186 // | <string info> | |
| 187 // | |
| 188 // <matrix info> : # rows: <integer> | |
| 189 // : # columns: <integer> | |
| 190 // | |
| 4687 | 191 // <string info> : # elements: <integer> |
| 192 // : # length: <integer> (once before each string) | |
| 4634 | 193 // |
| 4687 | 194 // For backward compatibility the type "string array" is treated as a |
| 195 // "string" type. Also "string" can have a single element with no elements | |
| 196 // line such that | |
| 197 // | |
| 198 // <string info> : # length: <integer> | |
| 4634 | 199 // |
| 200 // Formatted ASCII data follows the header. | |
| 201 // | |
| 202 // Example: | |
| 203 // | |
| 204 // # name: foo | |
| 205 // # type: matrix | |
| 206 // # rows: 2 | |
| 207 // # columns: 2 | |
| 208 // 2 4 | |
| 209 // 1 3 | |
| 210 // | |
| 211 // Example: | |
| 212 // | |
| 213 // # name: foo | |
| 4687 | 214 // # type: string |
| 4634 | 215 // # elements: 5 |
| 216 // # length: 4 | |
| 217 // this | |
| 218 // # length: 2 | |
| 219 // is | |
| 220 // # length: 1 | |
| 221 // a | |
| 222 // # length: 6 | |
| 223 // string | |
| 224 // # length: 5 | |
| 225 // array | |
| 226 // | |
| 5775 | 227 // FIXME -- this format is fairly rigid, and doesn't allow for |
| 4687 | 228 // arbitrary comments. Someone should fix that. It does allow arbitrary |
| 229 // types however. | |
| 4634 | 230 |
| 231 // Ugh. The signature of the compare method is not standard in older | |
| 232 // versions of the GNU libstdc++. Do this instead: | |
| 233 | |
| 234 #define SUBSTRING_COMPARE_EQ(s, pos, n, t) (s.substr (pos, n) == t) | |
| 235 | |
| 236 std::string | |
| 237 read_ascii_data (std::istream& is, const std::string& filename, bool& global, | |
| 5754 | 238 octave_value& tc, octave_idx_type count) |
| 4634 | 239 { |
| 240 // Read name for this entry or break on EOF. | |
| 241 | |
| 242 std::string name = extract_keyword (is, "name"); | |
| 243 | |
| 244 if (name.empty ()) | |
| 245 { | |
| 246 if (count == 0) | |
| 247 error ("load: empty name keyword or no data found in file `%s'", | |
| 248 filename.c_str ()); | |
| 249 | |
| 250 return std::string (); | |
| 251 } | |
| 252 | |
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253 if (! (name == ".nargin." || name == ".nargout." |
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254 || name == CELL_ELT_TAG || valid_identifier (name))) |
| 4634 | 255 { |
| 256 error ("load: bogus identifier `%s' found in file `%s'", | |
| 257 name.c_str (), filename.c_str ()); | |
| 258 return std::string (); | |
| 259 } | |
| 260 | |
| 261 // Look for type keyword. | |
| 262 | |
| 263 std::string tag = extract_keyword (is, "type"); | |
| 264 | |
| 265 if (! tag.empty ()) | |
| 266 { | |
| 267 std::string typ; | |
| 268 size_t pos = tag.rfind (' '); | |
| 269 | |
| 8021 | 270 if (pos != std::string::npos) |
| 4634 | 271 { |
| 272 global = SUBSTRING_COMPARE_EQ (tag, 0, 6, "global"); | |
| 273 | |
| 274 typ = global ? tag.substr (7) : tag; | |
| 275 } | |
| 276 else | |
| 277 typ = tag; | |
| 278 | |
| 4687 | 279 // Special case for backward compatiablity. A small bit of cruft |
| 280 if (SUBSTRING_COMPARE_EQ (typ, 0, 12, "string array")) | |
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281 tc = charMatrix (); |
| 4687 | 282 else |
| 283 tc = octave_value_typeinfo::lookup_type (typ); | |
| 4634 | 284 |
| 4988 | 285 if (! tc.load_ascii (is)) |
| 286 error ("load: trouble reading ascii file `%s'", filename.c_str ()); | |
| 4634 | 287 } |
| 288 else | |
| 289 error ("load: failed to extract keyword specifying value type"); | |
| 290 | |
| 291 if (error_state) | |
| 292 { | |
| 293 error ("load: reading file %s", filename.c_str ()); | |
| 294 return std::string (); | |
| 295 } | |
| 296 | |
| 297 return name; | |
| 298 } | |
| 299 | |
| 300 // Save the data from TC along with the corresponding NAME, and global | |
| 301 // flag MARK_AS_GLOBAL on stream OS in the plain text format described | |
| 302 // above for load_ascii_data. If NAME is empty, the name: line is not | |
| 303 // generated. PRECISION specifies the number of decimal digits to print. | |
| 304 // | |
| 305 // Assumes ranges and strings cannot contain Inf or NaN values. | |
| 306 // | |
| 307 // Returns 1 for success and 0 for failure. | |
| 308 | |
| 5775 | 309 // FIXME -- should probably write the help string here too. |
| 4634 | 310 |
| 311 bool | |
| 312 save_ascii_data (std::ostream& os, const octave_value& val_arg, | |
| 6974 | 313 const std::string& name, bool mark_as_global, |
| 314 int precision) | |
| 4634 | 315 { |
| 316 bool success = true; | |
| 317 | |
| 318 if (! name.empty ()) | |
| 319 os << "# name: " << name << "\n"; | |
| 320 | |
| 321 octave_value val = val_arg; | |
| 322 | |
| 4687 | 323 if (mark_as_global) |
| 324 os << "# type: global " << val.type_name () << "\n"; | |
| 325 else | |
| 326 os << "# type: " << val.type_name() << "\n"; | |
| 4634 | 327 |
| 5951 | 328 if (! precision) |
| 329 precision = Vsave_precision; | |
| 330 | |
| 331 long old_precision = os.precision (); | |
| 332 os.precision (precision); | |
| 333 | |
| 6974 | 334 success = val.save_ascii (os); |
| 4634 | 335 |
| 336 os.precision (old_precision); | |
| 337 | |
| 338 return (os && success); | |
| 339 } | |
| 340 | |
| 341 bool | |
| 342 save_ascii_data_for_plotting (std::ostream& os, const octave_value& t, | |
| 343 const std::string& name) | |
| 344 { | |
| 6974 | 345 return save_ascii_data (os, t, name, false, 6); |
| 4634 | 346 } |
| 347 | |
| 348 // Maybe this should be a static function in tree-plot.cc? | |
| 349 | |
| 350 // If TC is matrix, save it on stream OS in a format useful for | |
| 351 // making a 3-dimensional plot with gnuplot. If PARAMETRIC is | |
| 352 // TRUE, assume a parametric 3-dimensional plot will be generated. | |
| 353 | |
| 354 bool | |
| 355 save_three_d (std::ostream& os, const octave_value& tc, bool parametric) | |
| 356 { | |
| 357 bool fail = false; | |
| 358 | |
| 5275 | 359 octave_idx_type nr = tc.rows (); |
| 360 octave_idx_type nc = tc.columns (); | |
| 4634 | 361 |
| 362 if (tc.is_real_matrix ()) | |
| 363 { | |
| 364 os << "# 3D data...\n" | |
| 365 << "# type: matrix\n" | |
| 366 << "# total rows: " << nr << "\n" | |
| 367 << "# total columns: " << nc << "\n"; | |
| 368 | |
| 6171 | 369 long old_precision = os.precision (); |
| 6257 | 370 os.precision (6); |
| 6171 | 371 |
| 4634 | 372 if (parametric) |
| 373 { | |
| 5275 | 374 octave_idx_type extras = nc % 3; |
| 4634 | 375 if (extras) |
| 376 warning ("ignoring last %d columns", extras); | |
| 377 | |
| 378 Matrix tmp = tc.matrix_value (); | |
| 379 nr = tmp.rows (); | |
| 380 | |
| 5275 | 381 for (octave_idx_type i = 0; i < nc-extras; i += 3) |
| 4634 | 382 { |
| 383 os << tmp.extract (0, i, nr-1, i+2); | |
| 384 if (i+3 < nc-extras) | |
| 385 os << "\n"; | |
| 386 } | |
| 387 } | |
| 388 else | |
| 389 { | |
| 390 Matrix tmp = tc.matrix_value (); | |
| 391 nr = tmp.rows (); | |
| 392 | |
| 5275 | 393 for (octave_idx_type i = 0; i < nc; i++) |
| 4634 | 394 { |
| 395 os << tmp.extract (0, i, nr-1, i); | |
| 396 if (i+1 < nc) | |
| 397 os << "\n"; | |
| 398 } | |
| 399 } | |
| 6171 | 400 |
| 401 os.precision (old_precision); | |
| 4634 | 402 } |
| 403 else | |
| 404 { | |
| 405 ::error ("for now, I can only save real matrices in 3D format"); | |
| 406 fail = true; | |
| 407 } | |
| 408 | |
| 409 return (os && ! fail); | |
| 410 } | |
| 411 | |
| 5794 | 412 DEFUN (save_precision, args, nargout, |
| 413 "-*- texinfo -*-\n\ | |
| 414 @deftypefn {Built-in Function} {@var{val} =} save_precision ()\n\ | |
| 415 @deftypefnx {Built-in Function} {@var{old_val} =} save_precision (@var{new_val})\n\ | |
| 416 Query or set the internal variable that specifies the number of\n\ | |
| 417 digits to keep when saving data in text format.\n\ | |
| 418 @end deftypefn") | |
| 4634 | 419 { |
| 5794 | 420 return SET_INTERNAL_VARIABLE_WITH_LIMITS (save_precision, -1, INT_MAX); |
| 4634 | 421 } |
| 422 | |
| 423 /* | |
| 424 ;;; Local Variables: *** | |
| 425 ;;; mode: C++ *** | |
| 426 ;;; End: *** | |
| 427 */ | |
| 428 |