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1
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1 /* |
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2 |
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7017
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3 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, |
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4 2002, 2003, 2004, 2005, 2006, 2007 John W. Eaton |
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1
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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7016
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10 Free Software Foundation; either version 3 of the License, or (at your |
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11 option) any later version. |
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1
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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7016
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19 along with Octave; see the file COPYING. If not, see |
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20 <http://www.gnu.org/licenses/>. |
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1
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21 |
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22 */ |
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23 |
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240
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24 #ifdef HAVE_CONFIG_H |
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1192
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25 #include <config.h> |
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1
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26 #endif |
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27 |
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3716
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28 #include <cerrno> |
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1343
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29 #include <climits> |
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1346
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30 #include <cstring> |
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1343
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31 |
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3503
|
32 #include <fstream> |
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33 #include <iostream> |
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1728
|
34 #include <string> |
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35 |
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1350
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36 #ifdef HAVE_UNISTD_H |
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2442
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37 #ifdef HAVE_SYS_TYPES_H |
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1
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38 #include <sys/types.h> |
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2442
|
39 #endif |
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1
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40 #include <unistd.h> |
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41 #endif |
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367
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42 |
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4302
|
43 #include "quit.h" |
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44 |
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3040
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45 #include "dir-ops.h" |
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46 #include "file-ops.h" |
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2926
|
47 #include "file-stat.h" |
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4732
|
48 #include "lo-mappers.h" |
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1651
|
49 #include "oct-cmplx.h" |
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2926
|
50 #include "oct-env.h" |
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3040
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51 #include "pathsearch.h" |
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1755
|
52 #include "str-vec.h" |
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1651
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53 |
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4216
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54 #include "Cell.h" |
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2492
|
55 #include <defaults.h> |
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1352
|
56 #include "defun.h" |
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57 #include "dirfns.h" |
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58 #include "error.h" |
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59 #include "gripes.h" |
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60 #include "input.h" |
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5832
|
61 #include "load-path.h" |
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5465
|
62 #include "oct-errno.h" |
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1742
|
63 #include "oct-hist.h" |
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1750
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64 #include "oct-obj.h" |
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1352
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65 #include "pager.h" |
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1690
|
66 #include "sysdep.h" |
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1750
|
67 #include "toplev.h" |
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1
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68 #include "unwind-prot.h" |
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1352
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69 #include "utils.h" |
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70 #include "variables.h" |
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1
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71 |
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4143
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72 // Return TRUE if S is a valid identifier. |
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73 |
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74 bool |
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75 valid_identifier (const char *s) |
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76 { |
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5290
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77 if (! s || ! (isalpha (*s) || *s == '_' || *s == '$')) |
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4143
|
78 return false; |
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79 |
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80 while (*++s != '\0') |
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5290
|
81 if (! (isalnum (*s) || *s == '_' || *s == '$')) |
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4143
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82 return false; |
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83 |
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84 return true; |
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85 } |
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86 |
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87 bool |
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88 valid_identifier (const std::string& s) |
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89 { |
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90 return valid_identifier (s.c_str ()); |
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91 } |
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92 |
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4264
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93 DEFCMD (isvarname, args, , |
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5040
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94 "-*- texinfo -*-\n\ |
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95 @deftypefn {Built-in Function} {} isvarname (@var{name})\n\ |
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4264
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96 Return true if @var{name} is a valid variable name\n\ |
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97 @end deftypefn") |
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98 { |
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99 octave_value retval; |
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100 |
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101 int argc = args.length () + 1; |
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102 |
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4610
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103 string_vector argv = args.make_argv ("isvarname"); |
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4264
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104 |
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105 if (error_state) |
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106 return retval; |
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107 |
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108 if (argc == 2) |
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109 retval = valid_identifier (argv[1]); |
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110 else |
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5823
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111 print_usage (); |
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4264
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112 |
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113 return retval; |
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114 } |
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115 |
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6323
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116 // Return TRUE if F and G are both names for the same file. |
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117 |
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118 bool |
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119 same_file (const std::string& f, const std::string& g) |
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120 { |
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6598
|
121 return same_file_internal (f, g); |
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6323
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122 } |
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123 |
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1
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124 int |
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3523
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125 almost_match (const std::string& std, const std::string& s, int min_match_len, |
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526
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126 int case_sens) |
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1
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127 { |
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1755
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128 int stdlen = std.length (); |
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129 int slen = s.length (); |
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1
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130 |
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131 return (slen <= stdlen |
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132 && slen >= min_match_len |
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287
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133 && (case_sens |
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1755
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134 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
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135 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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136 } |
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137 |
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581
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138 // Ugh. |
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139 |
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287
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140 int |
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3523
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141 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
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287
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142 int min_toks_to_match, int max_toks) |
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143 { |
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144 int status = 0; |
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145 int tok_count = 0; |
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146 int toks_matched = 0; |
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147 |
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1755
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148 if (s.empty () || max_toks < 1) |
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287
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149 return status; |
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150 |
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1755
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151 char *kw = strsave (s.c_str ()); |
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287
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152 |
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153 char *t = kw; |
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154 while (*t != '\0') |
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155 { |
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156 if (*t == '\t') |
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157 *t = ' '; |
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158 t++; |
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159 } |
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160 |
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161 char *beg = kw; |
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162 while (*beg == ' ') |
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163 beg++; |
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164 |
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165 if (*beg == '\0') |
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166 return status; |
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167 |
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168 |
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3072
|
169 const char **to_match = new const char * [max_toks + 1]; |
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170 const char * const *s1 = std; |
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171 const char **s2 = to_match; |
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287
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172 |
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526
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173 if (! s1 || ! s2) |
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287
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174 goto done; |
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175 |
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176 s2[tok_count] = beg; |
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177 char *end; |
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526
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178 while ((end = strchr (beg, ' ')) != 0) |
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287
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179 { |
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180 *end = '\0'; |
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181 beg = end + 1; |
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182 |
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183 while (*beg == ' ') |
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184 beg++; |
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185 |
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186 if (*beg == '\0') |
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187 break; |
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188 |
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189 tok_count++; |
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190 if (tok_count >= max_toks) |
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191 goto done; |
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192 |
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193 s2[tok_count] = beg; |
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194 } |
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526
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195 s2[tok_count+1] = 0; |
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287
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196 |
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197 s2 = to_match; |
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198 |
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199 for (;;) |
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200 { |
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201 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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202 goto done; |
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203 |
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204 toks_matched++; |
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205 |
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206 s1++; |
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207 s2++; |
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208 |
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209 if (! *s2) |
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210 { |
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211 status = (toks_matched >= min_toks_to_match); |
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212 goto done; |
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213 } |
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214 |
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215 if (! *s1) |
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216 goto done; |
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217 } |
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218 |
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219 done: |
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220 |
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221 delete [] kw; |
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222 delete [] to_match; |
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223 |
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224 return status; |
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1
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225 } |
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226 |
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2234
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227 // Return non-zero if either NR or NC is zero. Return -1 if this |
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228 // should be considered fatal; return 1 if this is ok. |
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229 |
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230 int |
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5275
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231 empty_arg (const char * /* name */, octave_idx_type nr, octave_idx_type nc) |
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2234
|
232 { |
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4478
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233 return (nr == 0 || nc == 0); |
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2234
|
234 } |
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235 |
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581
|
236 // See if the given file is in the path. |
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237 |
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3536
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238 std::string |
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4243
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239 search_path_for_file (const std::string& path, const string_vector& names) |
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686
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240 { |
|
3174
|
241 dir_path p (path); |
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686
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242 |
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4243
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243 return octave_env::make_absolute (p.find_first_of (names), |
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244 octave_env::getcwd ()); |
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686
|
245 } |
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246 |
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4216
|
247 // Find all locations of the given file in the path. |
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248 |
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249 string_vector |
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4243
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250 search_path_for_all_files (const std::string& path, const string_vector& names) |
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4216
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251 { |
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252 dir_path p (path); |
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253 |
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4243
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254 string_vector sv = p.find_all_first_of (names); |
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4216
|
255 |
|
6379
|
256 octave_idx_type len = sv.length (); |
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4216
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257 |
|
6379
|
258 for (octave_idx_type i = 0; i < len; i++) |
|
4216
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259 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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260 |
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261 return sv; |
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262 } |
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263 |
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264 static string_vector |
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265 make_absolute (const string_vector& sv) |
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266 { |
|
6379
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267 octave_idx_type len = sv.length (); |
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268 |
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269 string_vector retval (len); |
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4216
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270 |
|
6379
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271 for (octave_idx_type i = 0; i < len; i++) |
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272 retval[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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273 |
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274 return retval; |
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4216
|
275 } |
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276 |
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3195
|
277 DEFUN (file_in_loadpath, args, , |
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3446
|
278 "-*- texinfo -*-\n\ |
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4216
|
279 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
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280 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ |
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3195
|
281 \n\ |
|
5448
|
282 Return the absolute name of @var{file} if it can be found in\n\ |
|
5814
|
283 the list of directories specified by @code{path}.\n\ |
|
4216
|
284 If no file is found, return an empty matrix.\n\ |
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285 \n\ |
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5448
|
286 If the first argument is a cell array of strings, search each\n\ |
|
4243
|
287 directory of the loadpath for element of the cell array and return\n\ |
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288 the first that matches.\n\ |
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289 \n\ |
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4216
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290 If the second optional argument @code{\"all\"} is supplied, return\n\ |
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291 a cell array containing the list of all files that have the same\n\ |
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292 name in the path. If no files are found, return an empty cell array.\n\ |
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5814
|
293 @seealso{file_in_path, path}\n\ |
|
5642
|
294 @end deftypefn") |
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3195
|
295 { |
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4216
|
296 octave_value retval; |
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3195
|
297 |
|
4243
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298 int nargin = args.length (); |
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3195
|
299 |
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4243
|
300 if (nargin == 1 || nargin == 2) |
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4216
|
301 { |
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4243
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302 string_vector names = args(0).all_strings (); |
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303 |
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304 if (! error_state && names.length () > 0) |
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305 { |
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306 if (nargin == 1) |
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307 { |
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308 std::string fname = octave_env::make_absolute |
|
5832
|
309 (load_path::find_first_of (names), octave_env::getcwd ()); |
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4243
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310 |
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311 if (fname.empty ()) |
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312 retval = Matrix (); |
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313 else |
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314 retval = fname; |
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315 } |
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316 else if (nargin == 2) |
|
|
317 { |
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318 std::string opt = args(1).string_value (); |
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319 |
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320 if (! error_state && opt == "all") |
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5832
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321 retval = Cell (make_absolute (load_path::find_all_first_of (names))); |
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4243
|
322 else |
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4249
|
323 error ("file_in_loadpath: invalid option"); |
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4243
|
324 } |
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325 } |
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4216
|
326 else |
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4243
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327 error ("file_in_loadpath: expecting string as first argument"); |
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4216
|
328 } |
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3195
|
329 else |
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5823
|
330 print_usage (); |
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3195
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331 |
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332 return retval; |
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333 } |
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334 |
|
1957
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335 DEFUN (file_in_path, args, , |
|
3301
|
336 "-*- texinfo -*-\n\ |
|
|
337 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
|
4216
|
338 @deftypefnx {Built-in Function} {} file_in_path (@var{path}, @var{file}, \"all\")\n\ |
|
5448
|
339 Return the absolute name of @var{file} if it can be found in\n\ |
|
3301
|
340 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
|
5814
|
341 directories in the format described for @code{path}. If no file\n\ |
|
5794
|
342 is found, return an empty matrix. For example,\n\ |
|
3301
|
343 \n\ |
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344 @example\n\ |
|
5456
|
345 file_in_path (EXEC_PATH, \"sh\")\n\ |
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346 @result{} \"/bin/sh\"\n\ |
|
3301
|
347 @end example\n\ |
|
4216
|
348 \n\ |
|
5448
|
349 If the second argument is a cell array of strings, search each\n\ |
|
4243
|
350 directory of the path for element of the cell array and return\n\ |
|
|
351 the first that matches.\n\ |
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|
352 \n\ |
|
4216
|
353 If the third optional argument @code{\"all\"} is supplied, return\n\ |
|
|
354 a cell array containing the list of all files that have the same\n\ |
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355 name in the path. If no files are found, return an empty cell array.\n\ |
|
4249
|
356 @seealso{file_in_loadpath}\n\ |
|
3301
|
357 @end deftypefn") |
|
686
|
358 { |
|
4216
|
359 octave_value retval; |
|
686
|
360 |
|
4243
|
361 int nargin = args.length (); |
|
1755
|
362 |
|
4243
|
363 if (nargin == 2 || nargin == 3) |
|
686
|
364 { |
|
4243
|
365 std::string path = args(0).string_value (); |
|
|
366 |
|
|
367 if (! error_state) |
|
|
368 { |
|
4249
|
369 string_vector names = args(1).all_strings (); |
|
4243
|
370 |
|
|
371 if (! error_state && names.length () > 0) |
|
|
372 { |
|
|
373 if (nargin == 2) |
|
|
374 { |
|
|
375 std::string fname = search_path_for_file (path, names); |
|
686
|
376 |
|
4243
|
377 if (fname.empty ()) |
|
|
378 retval = Matrix (); |
|
|
379 else |
|
|
380 retval = fname; |
|
|
381 } |
|
|
382 else if (nargin == 3) |
|
|
383 { |
|
4249
|
384 std::string opt = args(2).string_value (); |
|
4243
|
385 |
|
|
386 if (! error_state && opt == "all") |
|
|
387 retval = Cell (make_absolute (search_path_for_all_files (path, names))); |
|
|
388 else |
|
4249
|
389 error ("file_in_path: invalid option"); |
|
4243
|
390 } |
|
|
391 } |
|
|
392 else |
|
|
393 error ("file_in_path: expecting string as second argument"); |
|
|
394 } |
|
1755
|
395 else |
|
4243
|
396 error ("file_in_path: expecting string as first argument"); |
|
686
|
397 } |
|
|
398 else |
|
5823
|
399 print_usage (); |
|
686
|
400 |
|
|
401 return retval; |
|
|
402 } |
|
|
403 |
|
3536
|
404 std::string |
|
3523
|
405 file_in_path (const std::string& name, const std::string& suffix) |
|
526
|
406 { |
|
3523
|
407 std::string nm = name; |
|
526
|
408 |
|
1755
|
409 if (! suffix.empty ()) |
|
|
410 nm.append (suffix); |
|
686
|
411 |
|
5832
|
412 return octave_env::make_absolute |
|
|
413 (load_path::find_file (nm), octave_env::getcwd ()); |
|
526
|
414 } |
|
|
415 |
|
581
|
416 // See if there is an function file in the path. If so, return the |
|
|
417 // full path to the file. |
|
|
418 |
|
3536
|
419 std::string |
|
3523
|
420 fcn_file_in_path (const std::string& name) |
|
526
|
421 { |
|
3523
|
422 std::string retval; |
|
908
|
423 |
|
1755
|
424 int len = name.length (); |
|
|
425 |
|
|
426 if (len > 0) |
|
|
427 { |
|
5832
|
428 if (octave_env::absolute_pathname (name)) |
|
|
429 { |
|
|
430 file_stat fs (name); |
|
|
431 |
|
|
432 if (fs.exists ()) |
|
|
433 retval = name; |
|
|
434 } |
|
|
435 else if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
436 retval = load_path::find_fcn_file (name.substr (0, len-2)); |
|
908
|
437 else |
|
5832
|
438 retval = load_path::find_fcn_file (name); |
|
908
|
439 } |
|
1755
|
440 |
|
|
441 return retval; |
|
526
|
442 } |
|
|
443 |
|
5864
|
444 // See if there is a .oct file in the path. If so, return the |
|
581
|
445 // full path to the file. |
|
|
446 |
|
3536
|
447 std::string |
|
3523
|
448 oct_file_in_path (const std::string& name) |
|
572
|
449 { |
|
3523
|
450 std::string retval; |
|
908
|
451 |
|
1755
|
452 int len = name.length (); |
|
|
453 |
|
|
454 if (len > 0) |
|
|
455 { |
|
5832
|
456 if (octave_env::absolute_pathname (name)) |
|
|
457 { |
|
|
458 file_stat fs (name); |
|
|
459 |
|
|
460 if (fs.exists ()) |
|
|
461 retval = name; |
|
|
462 } |
|
|
463 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'o' |
|
|
464 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
|
465 retval = load_path::find_oct_file (name.substr (0, len-4)); |
|
908
|
466 else |
|
5832
|
467 retval = load_path::find_oct_file (name); |
|
908
|
468 } |
|
1755
|
469 |
|
|
470 return retval; |
|
572
|
471 } |
|
|
472 |
|
5864
|
473 // See if there is a .mex file in the path. If so, return the |
|
|
474 // full path to the file. |
|
|
475 |
|
|
476 std::string |
|
|
477 mex_file_in_path (const std::string& name) |
|
|
478 { |
|
|
479 std::string retval; |
|
|
480 |
|
|
481 int len = name.length (); |
|
|
482 |
|
|
483 if (len > 0) |
|
|
484 { |
|
|
485 if (octave_env::absolute_pathname (name)) |
|
|
486 { |
|
|
487 file_stat fs (name); |
|
|
488 |
|
|
489 if (fs.exists ()) |
|
|
490 retval = name; |
|
|
491 } |
|
|
492 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'm' |
|
|
493 && name [len - 2] == 'e' && name [len - 1] == 'x') |
|
|
494 retval = load_path::find_mex_file (name.substr (0, len-4)); |
|
|
495 else |
|
|
496 retval = load_path::find_mex_file (name); |
|
|
497 } |
|
|
498 |
|
|
499 return retval; |
|
|
500 } |
|
|
501 |
|
3103
|
502 // Replace backslash escapes in a string with the real values. |
|
|
503 |
|
3536
|
504 std::string |
|
3523
|
505 do_string_escapes (const std::string& s) |
|
3103
|
506 { |
|
3523
|
507 std::string retval; |
|
3103
|
508 |
|
|
509 size_t i = 0; |
|
|
510 size_t j = 0; |
|
|
511 size_t len = s.length (); |
|
|
512 |
|
|
513 retval.resize (len); |
|
|
514 |
|
|
515 while (j < len) |
|
|
516 { |
|
|
517 if (s[j] == '\\' && j+1 < len) |
|
|
518 { |
|
|
519 switch (s[++j]) |
|
|
520 { |
|
3893
|
521 case '0': |
|
|
522 retval[i] = '\0'; |
|
|
523 break; |
|
|
524 |
|
3103
|
525 case 'a': |
|
|
526 retval[i] = '\a'; |
|
|
527 break; |
|
|
528 |
|
|
529 case 'b': // backspace |
|
|
530 retval[i] = '\b'; |
|
|
531 break; |
|
|
532 |
|
|
533 case 'f': // formfeed |
|
|
534 retval[i] = '\f'; |
|
|
535 break; |
|
|
536 |
|
|
537 case 'n': // newline |
|
|
538 retval[i] = '\n'; |
|
|
539 break; |
|
|
540 |
|
|
541 case 'r': // carriage return |
|
|
542 retval[i] = '\r'; |
|
|
543 break; |
|
|
544 |
|
|
545 case 't': // horizontal tab |
|
|
546 retval[i] = '\t'; |
|
|
547 break; |
|
|
548 |
|
|
549 case 'v': // vertical tab |
|
|
550 retval[i] = '\v'; |
|
|
551 break; |
|
|
552 |
|
|
553 case '\\': // backslash |
|
|
554 retval[i] = '\\'; |
|
|
555 break; |
|
|
556 |
|
|
557 case '\'': // quote |
|
|
558 retval[i] = '\''; |
|
|
559 break; |
|
|
560 |
|
|
561 case '"': // double quote |
|
|
562 retval[i] = '"'; |
|
|
563 break; |
|
|
564 |
|
|
565 default: |
|
|
566 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
567 converting to `%c'", s[j], s[j]); |
|
|
568 retval[i] = s[j]; |
|
|
569 break; |
|
|
570 } |
|
|
571 } |
|
|
572 else |
|
|
573 { |
|
|
574 retval[i] = s[j]; |
|
|
575 } |
|
|
576 |
|
|
577 i++; |
|
|
578 j++; |
|
|
579 } |
|
|
580 |
|
3105
|
581 retval.resize (i); |
|
3103
|
582 |
|
|
583 return retval; |
|
|
584 } |
|
|
585 |
|
|
586 DEFUN (do_string_escapes, args, , |
|
3446
|
587 "-*- texinfo -*-\n\ |
|
|
588 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
|
|
589 Convert special characters in @var{string} to their escaped forms.\n\ |
|
|
590 @end deftypefn") |
|
3103
|
591 { |
|
|
592 octave_value retval; |
|
|
593 |
|
|
594 int nargin = args.length (); |
|
|
595 |
|
|
596 if (nargin == 1) |
|
|
597 { |
|
|
598 if (args(0).is_string ()) |
|
|
599 retval = do_string_escapes (args(0).string_value ()); |
|
|
600 else |
|
|
601 error ("do_string_escapes: argument must be a string"); |
|
|
602 } |
|
|
603 else |
|
5823
|
604 print_usage (); |
|
3103
|
605 |
|
|
606 return retval; |
|
|
607 } |
|
|
608 |
|
1755
|
609 const char * |
|
801
|
610 undo_string_escape (char c) |
|
|
611 { |
|
|
612 if (! c) |
|
1755
|
613 return ""; |
|
801
|
614 |
|
|
615 switch (c) |
|
|
616 { |
|
3893
|
617 case '\0': |
|
|
618 return "\\0"; |
|
|
619 |
|
801
|
620 case '\a': |
|
|
621 return "\\a"; |
|
|
622 |
|
|
623 case '\b': // backspace |
|
|
624 return "\\b"; |
|
|
625 |
|
|
626 case '\f': // formfeed |
|
|
627 return "\\f"; |
|
|
628 |
|
|
629 case '\n': // newline |
|
|
630 return "\\n"; |
|
|
631 |
|
|
632 case '\r': // carriage return |
|
|
633 return "\\r"; |
|
|
634 |
|
|
635 case '\t': // horizontal tab |
|
|
636 return "\\t"; |
|
|
637 |
|
|
638 case '\v': // vertical tab |
|
|
639 return "\\v"; |
|
|
640 |
|
|
641 case '\\': // backslash |
|
|
642 return "\\\\"; |
|
|
643 |
|
|
644 case '"': // double quote |
|
|
645 return "\\\""; |
|
|
646 |
|
|
647 default: |
|
1755
|
648 { |
|
|
649 static char retval[2]; |
|
|
650 retval[0] = c; |
|
|
651 retval[1] = '\0'; |
|
|
652 return retval; |
|
|
653 } |
|
801
|
654 } |
|
|
655 } |
|
|
656 |
|
3536
|
657 std::string |
|
3523
|
658 undo_string_escapes (const std::string& s) |
|
801
|
659 { |
|
3523
|
660 std::string retval; |
|
801
|
661 |
|
1755
|
662 for (size_t i = 0; i < s.length (); i++) |
|
|
663 retval.append (undo_string_escape (s[i])); |
|
801
|
664 |
|
1755
|
665 return retval; |
|
801
|
666 } |
|
|
667 |
|
1957
|
668 DEFUN (undo_string_escapes, args, , |
|
3361
|
669 "-*- texinfo -*-\n\ |
|
|
670 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
671 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
672 example, the expression\n\ |
|
|
673 \n\ |
|
|
674 @example\n\ |
|
|
675 bell = \"\\a\";\n\ |
|
|
676 @end example\n\ |
|
|
677 \n\ |
|
|
678 @noindent\n\ |
|
|
679 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
680 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
681 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
682 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
683 able to print the original representation of the string, with the\n\ |
|
|
684 special characters replaced by their escape sequences. For example,\n\ |
|
|
685 \n\ |
|
|
686 @example\n\ |
|
|
687 octave:13> undo_string_escapes (bell)\n\ |
|
|
688 ans = \\a\n\ |
|
|
689 @end example\n\ |
|
|
690 \n\ |
|
|
691 @noindent\n\ |
|
|
692 replaces the unprintable alert character with its printable\n\ |
|
|
693 representation.\n\ |
|
|
694 @end deftypefn") |
|
801
|
695 { |
|
2086
|
696 octave_value retval; |
|
801
|
697 |
|
|
698 int nargin = args.length (); |
|
|
699 |
|
3103
|
700 if (nargin == 1) |
|
|
701 { |
|
|
702 if (args(0).is_string ()) |
|
|
703 retval = undo_string_escapes (args(0).string_value ()); |
|
|
704 else |
|
|
705 error ("undo_string_escapes: argument must be a string"); |
|
|
706 } |
|
801
|
707 else |
|
5823
|
708 print_usage (); |
|
801
|
709 |
|
|
710 return retval; |
|
|
711 } |
|
|
712 |
|
5465
|
713 DEFUNX ("errno", Ferrno, args, , |
|
3716
|
714 "-*- texinfo -*-\n\ |
|
5465
|
715 @deftypefn {Built-in Function} {@var{err} =} errno ()\n\ |
|
|
716 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{val})\n\ |
|
|
717 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{name})\n\ |
|
|
718 Return the current value of the system-dependent variable errno,\n\ |
|
|
719 set its value to @var{val} and return the previous value, or return\n\ |
|
|
720 the named error code given @var{name} as a character string, or -1\n\ |
|
|
721 if @var{name} is not found.\n\ |
|
3716
|
722 @end deftypefn") |
|
|
723 { |
|
|
724 octave_value retval; |
|
|
725 |
|
5465
|
726 int nargin = args.length (); |
|
|
727 |
|
|
728 if (nargin == 1) |
|
|
729 { |
|
|
730 if (args(0).is_string ()) |
|
|
731 { |
|
|
732 std::string nm = args(0).string_value (); |
|
|
733 |
|
|
734 if (! error_state) |
|
|
735 retval = octave_errno::lookup (nm); |
|
|
736 else |
|
|
737 error ("errno: expecting character string argument"); |
|
|
738 } |
|
|
739 else |
|
|
740 { |
|
|
741 int val = args(0).int_value (); |
|
|
742 |
|
|
743 if (! error_state) |
|
|
744 retval = octave_errno::set (val); |
|
|
745 else |
|
|
746 error ("errno: expecting integer argument"); |
|
|
747 } |
|
|
748 } |
|
|
749 else if (nargin == 0) |
|
|
750 retval = octave_errno::get (); |
|
3716
|
751 else |
|
5823
|
752 print_usage (); |
|
3716
|
753 |
|
|
754 return retval; |
|
|
755 } |
|
|
756 |
|
5465
|
757 DEFUN (errno_list, args, , |
|
|
758 "-*- texinfo -*-\n\ |
|
|
759 @deftypefn {Built-in Function} {} errno_list ()\n\ |
|
|
760 Return a structure containing the system-dependent errno values.\n\ |
|
|
761 @end deftypefn") |
|
|
762 { |
|
|
763 octave_value retval; |
|
|
764 |
|
|
765 if (args.length () == 0) |
|
|
766 retval = octave_errno::list (); |
|
|
767 else |
|
5823
|
768 print_usage (); |
|
5465
|
769 |
|
|
770 return retval; |
|
|
771 } |
|
3716
|
772 |
|
2285
|
773 static void |
|
5275
|
774 check_dimensions (octave_idx_type& nr, octave_idx_type& nc, const char *warnfor) |
|
3354
|
775 { |
|
|
776 if (nr < 0 || nc < 0) |
|
|
777 { |
|
5781
|
778 warning_with_id ("Octave:neg-dim-as-zero", |
|
|
779 "%s: converting negative dimension to zero", warnfor); |
|
3354
|
780 |
|
4457
|
781 nr = (nr < 0) ? 0 : nr; |
|
|
782 nc = (nc < 0) ? 0 : nc; |
|
3354
|
783 } |
|
|
784 } |
|
|
785 |
|
|
786 void |
|
4513
|
787 check_dimensions (dim_vector& dim, const char *warnfor) |
|
4481
|
788 { |
|
|
789 bool neg = false; |
|
|
790 |
|
|
791 for (int i = 0; i < dim.length (); i++) |
|
|
792 { |
|
|
793 if (dim(i) < 0) |
|
|
794 { |
|
|
795 dim(i) = 0; |
|
|
796 neg = true; |
|
|
797 } |
|
|
798 } |
|
|
799 |
|
5781
|
800 if (neg) |
|
|
801 warning_with_id ("Octave:neg-dim-as-zero", |
|
|
802 "%s: converting negative dimension to zero", warnfor); |
|
4481
|
803 } |
|
|
804 |
|
|
805 |
|
|
806 void |
|
|
807 get_dimensions (const octave_value& a, const char *warn_for, |
|
4513
|
808 dim_vector& dim) |
|
4481
|
809 { |
|
|
810 if (a.is_scalar_type ()) |
|
|
811 { |
|
|
812 dim.resize (2); |
|
4732
|
813 dim(0) = a.int_value (); |
|
4481
|
814 dim(1) = dim(0); |
|
|
815 } |
|
|
816 else |
|
|
817 { |
|
5275
|
818 octave_idx_type nr = a.rows (); |
|
|
819 octave_idx_type nc = a.columns (); |
|
4481
|
820 |
|
|
821 if (nr == 1 || nc == 1) |
|
|
822 { |
|
|
823 Array<double> v = a.vector_value (); |
|
|
824 |
|
|
825 if (error_state) |
|
|
826 return; |
|
|
827 |
|
5275
|
828 octave_idx_type n = v.length (); |
|
4481
|
829 dim.resize (n); |
|
5275
|
830 for (octave_idx_type i = 0; i < n; i++) |
|
4783
|
831 dim(i) = static_cast<int> (fix (v(i))); |
|
4481
|
832 } |
|
|
833 else |
|
5257
|
834 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
4481
|
835 } |
|
|
836 |
|
5258
|
837 if (! error_state) |
|
|
838 check_dimensions (dim, warn_for); // May set error_state. |
|
4481
|
839 } |
|
|
840 |
|
|
841 |
|
|
842 void |
|
3354
|
843 get_dimensions (const octave_value& a, const char *warn_for, |
|
5275
|
844 octave_idx_type& nr, octave_idx_type& nc) |
|
3354
|
845 { |
|
|
846 if (a.is_scalar_type ()) |
|
|
847 { |
|
4732
|
848 nr = nc = a.int_value (); |
|
3354
|
849 } |
|
|
850 else |
|
|
851 { |
|
|
852 nr = a.rows (); |
|
|
853 nc = a.columns (); |
|
|
854 |
|
|
855 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
856 { |
|
3419
|
857 Array<double> v = a.vector_value (); |
|
3354
|
858 |
|
|
859 if (error_state) |
|
|
860 return; |
|
|
861 |
|
5275
|
862 nr = static_cast<octave_idx_type> (fix (v (0))); |
|
|
863 nc = static_cast<octave_idx_type> (fix (v (1))); |
|
3354
|
864 } |
|
|
865 else |
|
5257
|
866 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
3354
|
867 } |
|
|
868 |
|
5258
|
869 if (! error_state) |
|
|
870 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
3354
|
871 } |
|
|
872 |
|
|
873 void |
|
|
874 get_dimensions (const octave_value& a, const octave_value& b, |
|
5275
|
875 const char *warn_for, octave_idx_type& nr, octave_idx_type& nc) |
|
3354
|
876 { |
|
4732
|
877 nr = a.is_empty () ? 0 : a.int_value (); |
|
|
878 nc = b.is_empty () ? 0 : b.int_value (); |
|
3354
|
879 |
|
|
880 if (error_state) |
|
|
881 error ("%s: expecting two scalar arguments", warn_for); |
|
|
882 else |
|
|
883 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
884 } |
|
|
885 |
|
4478
|
886 Matrix |
|
5275
|
887 identity_matrix (octave_idx_type nr, octave_idx_type nc) |
|
4478
|
888 { |
|
|
889 Matrix m (nr, nc, 0.0); |
|
|
890 |
|
|
891 if (nr > 0 && nc > 0) |
|
|
892 { |
|
5275
|
893 octave_idx_type n = std::min (nr, nc); |
|
4478
|
894 |
|
5275
|
895 for (octave_idx_type i = 0; i < n; i++) |
|
4478
|
896 m (i, i) = 1.0; |
|
|
897 } |
|
|
898 |
|
|
899 return m; |
|
|
900 } |
|
|
901 |
|
3620
|
902 extern int |
|
3622
|
903 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
904 { |
|
|
905 int retval = -1; |
|
|
906 |
|
|
907 va_list args; |
|
|
908 va_start (args, fmt); |
|
|
909 |
|
|
910 retval = octave_vformat (os, fmt, args); |
|
|
911 |
|
|
912 va_end (args); |
|
|
913 |
|
|
914 return retval; |
|
|
915 } |
|
|
916 |
|
|
917 extern int |
|
3622
|
918 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
919 { |
|
|
920 int retval = -1; |
|
|
921 |
|
3775
|
922 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
|
3620
|
923 |
|
4135
|
924 std::streambuf *sb = os.rdbuf (); |
|
|
925 |
|
|
926 if (sb) |
|
4302
|
927 { |
|
|
928 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
929 |
|
|
930 retval = sb->vform (fmt, args); |
|
|
931 |
|
|
932 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
933 } |
|
3620
|
934 |
|
|
935 #else |
|
|
936 |
|
|
937 char *s = octave_vsnprintf (fmt, args); |
|
|
938 |
|
|
939 if (s) |
|
|
940 { |
|
|
941 os << s; |
|
|
942 |
|
|
943 retval = strlen (s); |
|
|
944 } |
|
|
945 |
|
|
946 #endif |
|
|
947 |
|
|
948 return retval; |
|
|
949 } |
|
|
950 |
|
5775
|
951 /* FIXME -- we really need a configure test for this. */ |
|
4302
|
952 |
|
6694
|
953 #if defined __GNUC__ && __GNUC__ >= 3 && ! defined __MINGW32__ |
|
4302
|
954 #define HAVE_C99_VSNPRINTF 1 |
|
|
955 #endif |
|
|
956 |
|
|
957 // We manage storage. User should not free it, and its contents are |
|
|
958 // only valid until next call to vsnprintf. |
|
|
959 |
|
|
960 // Interrupts might happen if someone makes a call with something that |
|
|
961 // will require a very large buffer. If we are interrupted in that |
|
|
962 // case, we should make the buffer size smaller for the next call. |
|
|
963 |
|
|
964 #define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF \ |
|
|
965 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1; \ |
|
|
966 delete [] buf; \ |
|
|
967 buf = 0; \ |
|
|
968 size = initial_size; \ |
|
|
969 octave_throw_interrupt_exception (); \ |
|
|
970 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2 |
|
|
971 |
|
4485
|
972 #if defined __GNUC__ && defined __va_copy |
|
|
973 #define SAVE_ARGS(saved_args, args) __va_copy (saved_args, args) |
|
|
974 #elif defined va_copy |
|
|
975 #define SAVE_ARGS(saved_args, args) va_copy (saved_args, args) |
|
|
976 #else |
|
|
977 #define SAVE_ARGS(saved_args, args) saved_args = args |
|
|
978 #endif |
|
|
979 |
|
4302
|
980 char * |
|
|
981 octave_vsnprintf (const char *fmt, va_list args) |
|
|
982 { |
|
|
983 static const size_t initial_size = 100; |
|
|
984 |
|
|
985 static size_t size = initial_size; |
|
|
986 |
|
|
987 static char *buf = 0; |
|
|
988 |
|
4482
|
989 #if defined (HAVE_C99_VSNPRINTF) |
|
|
990 size_t nchars; |
|
|
991 #else |
|
4351
|
992 int nchars; |
|
4482
|
993 #endif |
|
4302
|
994 |
|
|
995 if (! buf) |
|
|
996 buf = new char [size]; |
|
|
997 |
|
|
998 if (! buf) |
|
|
999 return 0; |
|
|
1000 |
|
|
1001 #if defined (HAVE_C99_VSNPRINTF) |
|
|
1002 |
|
4485
|
1003 // Note that the caller is responsible for calling va_end on args. |
|
|
1004 // We will do it for saved_args. |
|
|
1005 |
|
|
1006 va_list saved_args; |
|
|
1007 |
|
|
1008 SAVE_ARGS (saved_args, args); |
|
|
1009 |
|
4302
|
1010 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1011 |
|
|
1012 nchars = octave_raw_vsnprintf (buf, size, fmt, args); |
|
|
1013 |
|
|
1014 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1015 |
|
|
1016 if (nchars >= size) |
|
|
1017 { |
|
|
1018 size = nchars + 1; |
|
|
1019 |
|
|
1020 delete [] buf; |
|
|
1021 |
|
|
1022 buf = new char [size]; |
|
|
1023 |
|
|
1024 if (buf) |
|
|
1025 { |
|
|
1026 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1027 |
|
4485
|
1028 octave_raw_vsnprintf (buf, size, fmt, saved_args); |
|
4302
|
1029 |
|
|
1030 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1031 } |
|
|
1032 } |
|
|
1033 |
|
4485
|
1034 va_end (saved_args); |
|
|
1035 |
|
4302
|
1036 #else |
|
|
1037 |
|
|
1038 while (1) |
|
|
1039 { |
|
4485
|
1040 va_list saved_args; |
|
|
1041 |
|
|
1042 SAVE_ARGS (saved_args, args); |
|
|
1043 |
|
4302
|
1044 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1045 |
|
4485
|
1046 nchars = octave_raw_vsnprintf (buf, size, fmt, saved_args); |
|
|
1047 |
|
|
1048 va_end (saved_args); |
|
4302
|
1049 |
|
|
1050 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1051 |
|
4351
|
1052 if (nchars > -1 && nchars < size-1) |
|
4302
|
1053 return buf; |
|
|
1054 else |
|
|
1055 { |
|
|
1056 delete [] buf; |
|
|
1057 |
|
|
1058 size *= 2; |
|
|
1059 |
|
|
1060 buf = new char [size]; |
|
|
1061 |
|
|
1062 if (! buf) |
|
|
1063 return 0; |
|
|
1064 } |
|
|
1065 } |
|
|
1066 |
|
|
1067 #endif |
|
|
1068 |
|
|
1069 return buf; |
|
|
1070 } |
|
|
1071 |
|
|
1072 char * |
|
|
1073 octave_snprintf (const char *fmt, ...) |
|
|
1074 { |
|
|
1075 char *retval = 0; |
|
|
1076 |
|
|
1077 va_list args; |
|
|
1078 va_start (args, fmt); |
|
|
1079 |
|
|
1080 retval = octave_vsnprintf (fmt, args); |
|
|
1081 |
|
|
1082 va_end (args); |
|
|
1083 |
|
|
1084 return retval; |
|
|
1085 } |
|
|
1086 |
|
4086
|
1087 void |
|
|
1088 octave_sleep (double seconds) |
|
|
1089 { |
|
|
1090 if (seconds > 0) |
|
|
1091 { |
|
|
1092 double t; |
|
|
1093 |
|
4093
|
1094 unsigned int usec |
|
4783
|
1095 = static_cast<unsigned int> (modf (seconds, &t) * 1000000); |
|
4086
|
1096 |
|
4093
|
1097 unsigned int sec |
|
4783
|
1098 = (t > UINT_MAX) ? UINT_MAX : static_cast<unsigned int> (t); |
|
4086
|
1099 |
|
5770
|
1100 // Versions of these functions that accept unsigned int args are |
|
|
1101 // defined in cutils.c. |
|
4086
|
1102 octave_sleep (sec); |
|
|
1103 octave_usleep (usec); |
|
|
1104 } |
|
|
1105 } |
|
|
1106 |
|
572
|
1107 /* |
|
1
|
1108 ;;; Local Variables: *** |
|
|
1109 ;;; mode: C++ *** |
|
|
1110 ;;; End: *** |
|
|
1111 */ |
