Mercurial > jwe > octave
view libinterp/corefcn/ls-mat-ascii.cc @ 30569:796f54d4ddbf stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
In all .txi and .texi files except gpl.txi and gpl.texi in the
doc/liboctave and doc/interpreter directories, change the copyright
to "Octave Project Developers", the same as used for other source
files. Update copyright notices for 2022 (not done since 2019). For
gpl.txi and gpl.texi, change the copyright notice to be "Free Software
Foundation, Inc." and leave the date at 2007 only because this file
only contains the text of the GPL, not anything created by the Octave
Project Developers.
Add Paul Thomas to contributors.in.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 28 Dec 2021 18:22:40 -0500 |
parents | 75dff8f2de2e |
children | 670a0d878af1 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 1996-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // This file is part of Octave. // // Octave is free software: you can redistribute it and/or modify it // under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // Octave is distributed in the hope that it will be useful, but // WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with Octave; see the file COPYING. If not, see // <https://www.gnu.org/licenses/>. // //////////////////////////////////////////////////////////////////////// #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cctype> #include <iomanip> #include <istream> #include <ostream> #include <sstream> #include <string> #include "byte-swap.h" #include "dMatrix.h" #include "data-conv.h" #include "file-ops.h" #include "glob-match.h" #include "lo-mappers.h" #include "mach-info.h" #include "oct-env.h" #include "oct-time.h" #include "quit.h" #include "Cell.h" #include "defun.h" #include "error.h" #include "interpreter-private.h" #include "interpreter.h" #include "lex.h" #include "load-save.h" #include "ls-ascii-helper.h" #include "ls-mat-ascii.h" #include "oct-map.h" #include "ov-cell.h" #include "ov.h" #include "pager.h" #include "sysdep.h" #include "utils.h" #include "variables.h" #include "version.h" static std::string get_mat_data_input_line (std::istream& is) { std::string retval; bool have_data = false; do { retval = ""; char c; while (is.get (c)) { if (c == '\n' || c == '\r') { is.putback (c); octave::skip_preceeding_newline (is); break; } if (c == '%' || c == '#') { octave::skip_until_newline (is, false); break; } if (! is.eof ()) { if (! have_data && c != ' ' && c != '\t') have_data = true; retval += c; } } } while (! (have_data || is.eof () || is.fail ())); return retval; } static void get_lines_and_columns (std::istream& is, octave_idx_type& nr, octave_idx_type& nc, const std::string& filename = "", bool quiet = false, bool check_numeric = false) { std::streampos pos = is.tellg (); int file_line_number = 0; nr = 0; nc = 0; while (is) { octave_quit (); std::string buf = get_mat_data_input_line (is); file_line_number++; std::size_t beg = buf.find_first_not_of (", \t"); // If we see a CR as the last character in the buffer, we had a // CRLF pair as the line separator. Any other CR in the text // will not be considered as whitespace. if (beg != std::string::npos && buf[beg] == '\r' && beg == buf.length () - 1) { // We had a blank line ending with a CRLF. Handle it the // same as an empty line. beg = std::string::npos; } octave_idx_type tmp_nc = 0; while (beg != std::string::npos) { tmp_nc++; std::size_t end = buf.find_first_of (", \t", beg); if (end != std::string::npos) { if (check_numeric) { std::istringstream tmp_stream (buf.substr (beg, end-beg)); octave::read_value<double> (tmp_stream); if (tmp_stream.fail ()) { if (! quiet) error ("load: %s: non-numeric data found near line %d", filename.c_str (), file_line_number); nr = 0; nc = 0; goto done; } } beg = buf.find_first_not_of (", \t", end); if (beg == std::string::npos || (buf[beg] == '\r' && beg == buf.length () - 1)) { // We had a line with trailing spaces and ending with a CRLF, // so this should look like EOL, not a new column. break; } } else break; } if (tmp_nc > 0) { if (nc == 0) { nc = tmp_nc; nr++; } else if (nc == tmp_nc) nr++; else { if (! quiet) error ("load: %s: inconsistent number of columns near line %d", filename.c_str (), file_line_number); nr = 0; nc = 0; goto done; } } } if (! quiet && (nr == 0 || nc == 0)) error ("load: file '%s' seems to be empty!", filename.c_str ()); done: is.clear (); is.seekg (pos); } // Extract a matrix from a file of numbers only. // // Comments are not allowed. The file should only have numeric values. // // Reads the file twice. Once to find the number of rows and columns, // and once to extract the matrix. // // FILENAME is used for error messages. // // This format provides no way to tag the data as global. std::string read_mat_ascii_data (std::istream& is, const std::string& filename, octave_value& tc) { std::string varname; std::size_t pos = filename.rfind ('/'); if (pos != std::string::npos) varname = filename.substr (pos+1); else varname = filename; pos = varname.rfind ('.'); if (pos != std::string::npos) varname = varname.substr (0, pos); std::size_t len = varname.length (); for (std::size_t i = 0; i < len; i++) { char c = varname[i]; if (! (isalnum (c) || c == '_')) varname[i] = '_'; } if (octave::iskeyword (varname) || ! isalpha (varname[0])) varname.insert (0, "X"); if (! octave::valid_identifier (varname)) error ("load: unable to convert filename '%s' to valid identifier", filename.c_str ()); octave_idx_type nr = 0; octave_idx_type nc = 0; octave_idx_type total_count = 0; get_lines_and_columns (is, nr, nc, filename); octave_quit (); if (nr <= 0 || nc <= 0) error ("load: unable to extract matrix size from file '%s'", filename.c_str ()); Matrix tmp (nr, nc); double d; for (octave_idx_type i = 0; i < nr; i++) { std::string buf = get_mat_data_input_line (is); std::istringstream tmp_stream (buf); for (octave_idx_type j = 0; j < nc; j++) { octave_quit (); d = octave::read_value<double> (tmp_stream); if (! tmp_stream && ! tmp_stream.eof ()) error ("load: failed to read matrix from file '%s'", filename.c_str ()); tmp.elem (i, j) = d; total_count++; // Skip whitespace and commas. char c; while (1) { tmp_stream >> c; if (! tmp_stream) break; if (! (c == ' ' || c == '\t' || c == ',')) { tmp_stream.putback (c); break; } } if (tmp_stream.eof ()) break; } } if (! is && ! is.eof ()) error ("load: failed to read matrix from file '%s'", filename.c_str ()); // FIXME: not sure this is best, but it works. if (is.eof ()) is.clear (); octave_idx_type expected = nr * nc; if (expected != total_count) error ("load: expected %" OCTAVE_IDX_TYPE_FORMAT " elements, found " "%" OCTAVE_IDX_TYPE_FORMAT, expected, total_count); tc = tmp; return varname; } bool save_mat_ascii_data (std::ostream& os, const octave_value& val, int precision, bool tabs) { bool success = true; if (val.iscomplex ()) warning ("save: omitting imaginary part for ASCII file"); if (val.ndims () > 2) { warning ("save: skipping variable which is not a 2-D matrix"); return true; } Matrix m; try { m = val.matrix_value (true); } catch (const octave::execution_exception&) { octave::interpreter& interp = octave::__get_interpreter__ ("save_mat_ascii_data"); interp.recover_from_exception (); success = false; } if (success) { long old_precision = os.precision (); os.precision (precision); std::ios::fmtflags oflags = os.flags (static_cast<std::ios::fmtflags> (std::ios::scientific)); if (tabs) { for (octave_idx_type i = 0; i < m.rows (); i++) { for (octave_idx_type j = 0; j < m.cols (); j++) { // Omit leading tabs. if (j != 0) os << '\t'; octave::write_value<double> (os, m(i, j)); } os << "\n"; } } else os << m; // Restore format os.flags (oflags); os.precision (old_precision); } return (os && success); } bool looks_like_mat_ascii_file (std::istream& is, const std::string& filename) { bool retval = false; octave_idx_type nr = 0; octave_idx_type nc = 0; get_lines_and_columns (is, nr, nc, filename, true, true); retval = (nr != 0 && nc != 0); return retval; }