Mercurial > octave
annotate liboctave/util/file-info.cc @ 29572:aef11bb4e6d1
use std::size_t and std::ptrdiff_t in C++ code (bug #60471)
Files affected: make_int.cc, file-editor-tab.cc, octave-qscintilla.cc,
Cell.cc, Cell.h, call-stack.cc, call-stack.h, cellfun.cc, data.cc,
debug.cc, dlmread.cc, error.cc, event-queue.h, fcn-info.cc,
fcn-info.h, file-io.cc, ft-text-renderer.cc, gl2ps-print.cc,
graphics.cc, graphics.in.h, help.cc, hex2num.cc, input.cc,
latex-text-renderer.cc, load-path.cc, load-save.cc, load-save.h,
ls-hdf5.cc, ls-mat-ascii.cc, ls-mat5.cc, ls-oct-text.cc, mex.cc,
mexproto.h, mxarray.h, oct-map.cc, oct-stream.cc, oct-stream.h,
pager.cc, pager.h, pr-output.cc, regexp.cc, settings.h,
stack-frame.cc, stack-frame.h, strfns.cc, syminfo.cc, symrec.h,
symscope.cc, symscope.h, symtab.cc, sysdep.cc, toplev.cc, utils.cc,
utils.h, variables.cc, __fltk_uigetfile__.cc, __init_fltk__.cc,
audioread.cc, gzip.cc, cdef-class.cc, cdef-manager.cc, cdef-method.cc,
cdef-object.cc, cdef-object.h, ov-base-diag.cc, ov-base-diag.h,
ov-base-mat.cc, ov-base-mat.h, ov-base-scalar.cc, ov-base-scalar.h,
ov-base-sparse.h, ov-base.cc, ov-base.h, ov-cell.cc, ov-cell.h,
ov-ch-mat.cc, ov-class.cc, ov-class.h, ov-classdef.cc,
ov-fcn-handle.cc, ov-java.cc, ov-lazy-idx.h, ov-perm.cc, ov-perm.h,
ov-range.h, ov-str-mat.cc, ov-struct.cc, ov-struct.h, ov-usr-fcn.cc,
ov-usr-fcn.h, ov.cc, ov.h, ovl.cc, octave.cc, bp-table.cc, jit-ir.cc,
jit-ir.h, jit-typeinfo.cc, jit-typeinfo.h, jit-util.h, lex.h, lex.ll,
oct-lvalue.cc, oct-parse.yy, parse.h, profiler.h, pt-eval.cc,
pt-eval.h, pt-jit.cc, pt-jit.h, pt-pr-code.cc, pt-tm-const.cc,
pt-tm-const.h, Array.h, CMatrix.cc, DiagArray2.h, PermMatrix.h,
Sparse.h, dMatrix.cc, fCMatrix.cc, fMatrix.cc, bsxfun-defs.cc,
oct-fftw.cc, oct-fftw.h, randpoisson.cc, sparse-chol.cc,
mx-inlines.cc, file-ops.cc, lo-sysdep.cc, oct-env.cc, oct-time.cc,
action-container.cc, action-container.h, base-list.h, caseless-str.h,
cmd-edit.cc, cmd-hist.cc, data-conv.cc, data-conv.h, f77-fcn.h,
file-info.cc, file-info.h, kpse.cc, kpse.h, lo-cutils.h, lo-hash.h,
lo-regexp.cc, oct-base64.cc, oct-base64.h, oct-binmap.h, oct-glob.cc,
oct-shlib.cc, oct-shlib.h, oct-sort.cc, oct-sparse.h, oct-string.cc,
quit.cc, unwind-prot.h, url-transfer.cc, main.in.cc, mkoctfile.in.cc,
and shared-fcns.h.
author | John W. Eaton <jwe@octave.org> |
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date | Wed, 28 Apr 2021 22:57:42 -0400 |
parents | 0a5b15007766 |
children | 796f54d4ddbf |
rev | line source |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 2001-2021 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
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25 |
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26 #if defined (HAVE_CONFIG_H) |
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27 # include "config.h" |
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28 #endif |
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29 |
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30 #include <deque> |
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31 #include <fstream> |
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32 |
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33 #include "file-info.h" |
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34 #include "file-stat.h" |
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35 #include "lo-error.h" |
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36 #include "lo-sysdep.h" |
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37 |
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38 namespace octave |
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39 { |
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40 std::string file_info::get_line (std::size_t line) const |
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41 { |
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42 std::string retval; |
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43 |
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44 if (line == 0) |
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45 return retval; |
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46 |
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47 if (line < m_offsets.size ()) |
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48 { |
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49 std::size_t bol = m_offsets[line-1]; |
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50 std::size_t eol = m_offsets[line]; |
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51 |
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52 while (eol > 0 && eol > bol |
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53 && (m_file_buf[eol-1] == '\n' || m_file_buf[eol-1] == '\r')) |
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54 eol--; |
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55 |
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56 retval = m_file_buf.substr (bol, eol - bol); |
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57 } |
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58 |
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59 return retval; |
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60 } |
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61 |
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62 std::deque<std::string> |
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63 file_info::get_lines (std::size_t line, std::size_t num_lines) const |
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64 { |
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65 std::deque<std::string> retval; |
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66 |
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67 for (std::size_t i = line; i < line+num_lines; i++) |
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68 retval.push_back (get_line (i)); |
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69 |
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70 return retval; |
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71 } |
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72 |
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73 // Read entire file called fname and return the contents as a string |
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74 |
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75 std::string file_info::snarf_file (const std::string& fname) |
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76 { |
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77 std::string retval; |
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78 |
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79 sys::file_stat fs (fname); |
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80 |
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81 if (! fs) |
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82 (*current_liboctave_error_handler) ("no such file, '%s'", fname.c_str ()); |
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83 |
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84 std::size_t sz = fs.size (); |
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85 |
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86 std::ifstream file = sys::ifstream (fname.c_str (), |
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87 std::ios::in | std::ios::binary); |
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88 |
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89 if (file) |
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90 { |
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91 std::string buf (sz+1, 0); |
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92 |
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93 file.read (&buf[0], sz+1); |
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94 |
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95 if (! file.eof ()) |
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96 (*current_liboctave_error_handler) |
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97 ("error reading file %s", fname.c_str ()); |
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98 |
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99 // Expected to read the entire file. |
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100 retval = buf; |
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101 } |
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102 |
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103 return retval; |
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104 } |
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105 |
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106 std::vector<std::size_t> file_info::get_line_offsets (const std::string& buf) |
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107 { |
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108 std::deque<std::size_t> tmp_offsets; |
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109 |
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110 tmp_offsets.push_back (0); |
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111 |
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112 std::size_t len = buf.length (); |
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113 |
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114 for (std::size_t i = 0; i < len; i++) |
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115 { |
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116 char c = buf[i]; |
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117 |
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118 if (c == '\r' && ++i < len) |
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119 { |
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120 c = buf[i]; |
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121 |
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122 if (c == '\n') |
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123 tmp_offsets.push_back (i+1); |
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124 else |
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125 tmp_offsets.push_back (i); |
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126 } |
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127 else if (c == '\n') |
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128 tmp_offsets.push_back (i+1); |
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129 } |
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130 |
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131 tmp_offsets.push_back (len-1); |
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132 |
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133 std::size_t n = tmp_offsets.size (); |
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134 |
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135 std::vector<std::size_t> retval (n); |
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136 std::size_t i = 0; |
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137 for (auto& elt : tmp_offsets) |
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138 retval[i++] = elt; |
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139 |
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140 return retval; |
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141 } |
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142 } |