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1
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1 /* |
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2 |
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2847
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3 Copyright (C) 1996, 1997 John W. Eaton |
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1
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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5307
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19 Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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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
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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
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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
|
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
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49 #include "oct-cmplx.h" |
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2926
|
50 #include "oct-env.h" |
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3040
|
51 #include "pathsearch.h" |
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1755
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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
|
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 == '$')) |
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4143
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78 return false; |
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79 |
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80 while (*++s != '\0') |
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5290
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81 if (! (isalnum (*s) || *s == '_' || *s == '$')) |
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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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1
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116 int |
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3523
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117 almost_match (const std::string& std, const std::string& s, int min_match_len, |
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526
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118 int case_sens) |
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1
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119 { |
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1755
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120 int stdlen = std.length (); |
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121 int slen = s.length (); |
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1
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122 |
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123 return (slen <= stdlen |
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124 && slen >= min_match_len |
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287
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125 && (case_sens |
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1755
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126 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
|
127 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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128 } |
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129 |
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581
|
130 // Ugh. |
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131 |
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287
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132 int |
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3523
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133 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
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287
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134 int min_toks_to_match, int max_toks) |
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135 { |
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136 int status = 0; |
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137 int tok_count = 0; |
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138 int toks_matched = 0; |
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139 |
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1755
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140 if (s.empty () || max_toks < 1) |
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287
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141 return status; |
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142 |
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1755
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143 char *kw = strsave (s.c_str ()); |
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287
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144 |
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145 char *t = kw; |
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146 while (*t != '\0') |
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147 { |
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148 if (*t == '\t') |
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149 *t = ' '; |
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150 t++; |
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151 } |
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152 |
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153 char *beg = kw; |
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154 while (*beg == ' ') |
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155 beg++; |
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156 |
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157 if (*beg == '\0') |
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158 return status; |
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159 |
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160 |
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3072
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161 const char **to_match = new const char * [max_toks + 1]; |
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162 const char * const *s1 = std; |
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163 const char **s2 = to_match; |
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287
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164 |
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526
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165 if (! s1 || ! s2) |
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287
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166 goto done; |
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167 |
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168 s2[tok_count] = beg; |
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169 char *end; |
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526
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170 while ((end = strchr (beg, ' ')) != 0) |
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287
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171 { |
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172 *end = '\0'; |
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173 beg = end + 1; |
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174 |
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175 while (*beg == ' ') |
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176 beg++; |
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177 |
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178 if (*beg == '\0') |
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179 break; |
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180 |
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181 tok_count++; |
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182 if (tok_count >= max_toks) |
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183 goto done; |
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184 |
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185 s2[tok_count] = beg; |
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186 } |
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526
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187 s2[tok_count+1] = 0; |
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287
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188 |
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189 s2 = to_match; |
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190 |
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191 for (;;) |
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192 { |
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193 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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194 goto done; |
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195 |
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196 toks_matched++; |
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197 |
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198 s1++; |
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199 s2++; |
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200 |
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201 if (! *s2) |
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202 { |
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203 status = (toks_matched >= min_toks_to_match); |
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204 goto done; |
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205 } |
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206 |
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207 if (! *s1) |
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208 goto done; |
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209 } |
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210 |
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211 done: |
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212 |
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213 delete [] kw; |
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214 delete [] to_match; |
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215 |
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216 return status; |
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1
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217 } |
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218 |
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2234
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219 // Return non-zero if either NR or NC is zero. Return -1 if this |
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220 // should be considered fatal; return 1 if this is ok. |
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221 |
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222 int |
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5275
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223 empty_arg (const char * /* name */, octave_idx_type nr, octave_idx_type nc) |
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2234
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224 { |
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4478
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225 return (nr == 0 || nc == 0); |
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2234
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226 } |
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227 |
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581
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228 // See if the given file is in the path. |
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229 |
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3536
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230 std::string |
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4243
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231 search_path_for_file (const std::string& path, const string_vector& names) |
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686
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232 { |
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3174
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233 dir_path p (path); |
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686
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234 |
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4243
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235 return octave_env::make_absolute (p.find_first_of (names), |
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236 octave_env::getcwd ()); |
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686
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237 } |
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238 |
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4216
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239 // Find all locations of the given file in the path. |
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240 |
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241 string_vector |
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4243
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242 search_path_for_all_files (const std::string& path, const string_vector& names) |
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4216
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243 { |
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244 dir_path p (path); |
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245 |
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4243
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246 string_vector sv = p.find_all_first_of (names); |
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4216
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247 |
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248 int len = sv.length (); |
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249 |
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250 for (int i = 0; i < len; i++) |
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251 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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252 |
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253 return sv; |
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254 } |
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255 |
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256 static string_vector |
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257 make_absolute (const string_vector& sv) |
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258 { |
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259 int len = sv.length (); |
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260 |
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261 for (int i = 0; i < len; i++) |
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262 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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263 |
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264 return sv; |
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265 } |
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266 |
|
3195
|
267 DEFUN (file_in_loadpath, args, , |
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3446
|
268 "-*- texinfo -*-\n\ |
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4216
|
269 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
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270 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ |
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3195
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271 \n\ |
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5448
|
272 Return the absolute name of @var{file} if it can be found in\n\ |
|
5814
|
273 the list of directories specified by @code{path}.\n\ |
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4216
|
274 If no file is found, return an empty matrix.\n\ |
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275 \n\ |
|
5448
|
276 If the first argument is a cell array of strings, search each\n\ |
|
4243
|
277 directory of the loadpath for element of the cell array and return\n\ |
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278 the first that matches.\n\ |
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279 \n\ |
|
4216
|
280 If the second optional argument @code{\"all\"} is supplied, return\n\ |
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281 a cell array containing the list of all files that have the same\n\ |
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282 name in the path. If no files are found, return an empty cell array.\n\ |
|
5814
|
283 @seealso{file_in_path, path}\n\ |
|
5642
|
284 @end deftypefn") |
|
3195
|
285 { |
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4216
|
286 octave_value retval; |
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3195
|
287 |
|
4243
|
288 int nargin = args.length (); |
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3195
|
289 |
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4243
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290 if (nargin == 1 || nargin == 2) |
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4216
|
291 { |
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4243
|
292 string_vector names = args(0).all_strings (); |
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293 |
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294 if (! error_state && names.length () > 0) |
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295 { |
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296 if (nargin == 1) |
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297 { |
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298 std::string fname = octave_env::make_absolute |
|
5832
|
299 (load_path::find_first_of (names), octave_env::getcwd ()); |
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4243
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300 |
|
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301 if (fname.empty ()) |
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302 retval = Matrix (); |
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303 else |
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304 retval = fname; |
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305 } |
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306 else if (nargin == 2) |
|
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307 { |
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308 std::string opt = args(1).string_value (); |
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309 |
|
|
310 if (! error_state && opt == "all") |
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5832
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311 retval = Cell (make_absolute (load_path::find_all_first_of (names))); |
|
4243
|
312 else |
|
4249
|
313 error ("file_in_loadpath: invalid option"); |
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4243
|
314 } |
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|
315 } |
|
4216
|
316 else |
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4243
|
317 error ("file_in_loadpath: expecting string as first argument"); |
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4216
|
318 } |
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3195
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319 else |
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5823
|
320 print_usage (); |
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3195
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321 |
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322 return retval; |
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323 } |
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324 |
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1957
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325 DEFUN (file_in_path, args, , |
|
3301
|
326 "-*- texinfo -*-\n\ |
|
|
327 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
|
4216
|
328 @deftypefnx {Built-in Function} {} file_in_path (@var{path}, @var{file}, \"all\")\n\ |
|
5448
|
329 Return the absolute name of @var{file} if it can be found in\n\ |
|
3301
|
330 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
|
5814
|
331 directories in the format described for @code{path}. If no file\n\ |
|
5794
|
332 is found, return an empty matrix. For example,\n\ |
|
3301
|
333 \n\ |
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334 @example\n\ |
|
5456
|
335 file_in_path (EXEC_PATH, \"sh\")\n\ |
|
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336 @result{} \"/bin/sh\"\n\ |
|
3301
|
337 @end example\n\ |
|
4216
|
338 \n\ |
|
5448
|
339 If the second argument is a cell array of strings, search each\n\ |
|
4243
|
340 directory of the path for element of the cell array and return\n\ |
|
|
341 the first that matches.\n\ |
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|
342 \n\ |
|
4216
|
343 If the third optional argument @code{\"all\"} is supplied, return\n\ |
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|
344 a cell array containing the list of all files that have the same\n\ |
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345 name in the path. If no files are found, return an empty cell array.\n\ |
|
4249
|
346 @seealso{file_in_loadpath}\n\ |
|
3301
|
347 @end deftypefn") |
|
686
|
348 { |
|
4216
|
349 octave_value retval; |
|
686
|
350 |
|
4243
|
351 int nargin = args.length (); |
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1755
|
352 |
|
4243
|
353 if (nargin == 2 || nargin == 3) |
|
686
|
354 { |
|
4243
|
355 std::string path = args(0).string_value (); |
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|
356 |
|
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357 if (! error_state) |
|
|
358 { |
|
4249
|
359 string_vector names = args(1).all_strings (); |
|
4243
|
360 |
|
|
361 if (! error_state && names.length () > 0) |
|
|
362 { |
|
|
363 if (nargin == 2) |
|
|
364 { |
|
|
365 std::string fname = search_path_for_file (path, names); |
|
686
|
366 |
|
4243
|
367 if (fname.empty ()) |
|
|
368 retval = Matrix (); |
|
|
369 else |
|
|
370 retval = fname; |
|
|
371 } |
|
|
372 else if (nargin == 3) |
|
|
373 { |
|
4249
|
374 std::string opt = args(2).string_value (); |
|
4243
|
375 |
|
|
376 if (! error_state && opt == "all") |
|
|
377 retval = Cell (make_absolute (search_path_for_all_files (path, names))); |
|
|
378 else |
|
4249
|
379 error ("file_in_path: invalid option"); |
|
4243
|
380 } |
|
|
381 } |
|
|
382 else |
|
|
383 error ("file_in_path: expecting string as second argument"); |
|
|
384 } |
|
1755
|
385 else |
|
4243
|
386 error ("file_in_path: expecting string as first argument"); |
|
686
|
387 } |
|
|
388 else |
|
5823
|
389 print_usage (); |
|
686
|
390 |
|
|
391 return retval; |
|
|
392 } |
|
|
393 |
|
3536
|
394 std::string |
|
3523
|
395 file_in_path (const std::string& name, const std::string& suffix) |
|
526
|
396 { |
|
3523
|
397 std::string nm = name; |
|
526
|
398 |
|
1755
|
399 if (! suffix.empty ()) |
|
|
400 nm.append (suffix); |
|
686
|
401 |
|
5832
|
402 return std::string (); |
|
|
403 |
|
|
404 return octave_env::make_absolute |
|
|
405 (load_path::find_file (nm), octave_env::getcwd ()); |
|
526
|
406 } |
|
|
407 |
|
581
|
408 // See if there is an function file in the path. If so, return the |
|
|
409 // full path to the file. |
|
|
410 |
|
3536
|
411 std::string |
|
3523
|
412 fcn_file_in_path (const std::string& name) |
|
526
|
413 { |
|
3523
|
414 std::string retval; |
|
908
|
415 |
|
1755
|
416 int len = name.length (); |
|
|
417 |
|
|
418 if (len > 0) |
|
|
419 { |
|
5832
|
420 if (octave_env::absolute_pathname (name)) |
|
|
421 { |
|
|
422 file_stat fs (name); |
|
|
423 |
|
|
424 if (fs.exists ()) |
|
|
425 retval = name; |
|
|
426 } |
|
|
427 else if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
428 retval = load_path::find_fcn_file (name.substr (0, len-2)); |
|
908
|
429 else |
|
5832
|
430 retval = load_path::find_fcn_file (name); |
|
908
|
431 } |
|
1755
|
432 |
|
|
433 return retval; |
|
526
|
434 } |
|
|
435 |
|
581
|
436 // See if there is an octave file in the path. If so, return the |
|
|
437 // full path to the file. |
|
|
438 |
|
3536
|
439 std::string |
|
3523
|
440 oct_file_in_path (const std::string& name) |
|
572
|
441 { |
|
3523
|
442 std::string retval; |
|
908
|
443 |
|
1755
|
444 int len = name.length (); |
|
|
445 |
|
|
446 if (len > 0) |
|
|
447 { |
|
5832
|
448 if (octave_env::absolute_pathname (name)) |
|
|
449 { |
|
|
450 file_stat fs (name); |
|
|
451 |
|
|
452 if (fs.exists ()) |
|
|
453 retval = name; |
|
|
454 } |
|
|
455 else if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'o' |
|
|
456 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
|
457 retval = load_path::find_oct_file (name.substr (0, len-4)); |
|
908
|
458 else |
|
5832
|
459 retval = load_path::find_oct_file (name); |
|
908
|
460 } |
|
1755
|
461 |
|
|
462 return retval; |
|
572
|
463 } |
|
|
464 |
|
3103
|
465 // Replace backslash escapes in a string with the real values. |
|
|
466 |
|
3536
|
467 std::string |
|
3523
|
468 do_string_escapes (const std::string& s) |
|
3103
|
469 { |
|
3523
|
470 std::string retval; |
|
3103
|
471 |
|
|
472 size_t i = 0; |
|
|
473 size_t j = 0; |
|
|
474 size_t len = s.length (); |
|
|
475 |
|
|
476 retval.resize (len); |
|
|
477 |
|
|
478 while (j < len) |
|
|
479 { |
|
|
480 if (s[j] == '\\' && j+1 < len) |
|
|
481 { |
|
|
482 switch (s[++j]) |
|
|
483 { |
|
3893
|
484 case '0': |
|
|
485 retval[i] = '\0'; |
|
|
486 break; |
|
|
487 |
|
3103
|
488 case 'a': |
|
|
489 retval[i] = '\a'; |
|
|
490 break; |
|
|
491 |
|
|
492 case 'b': // backspace |
|
|
493 retval[i] = '\b'; |
|
|
494 break; |
|
|
495 |
|
|
496 case 'f': // formfeed |
|
|
497 retval[i] = '\f'; |
|
|
498 break; |
|
|
499 |
|
|
500 case 'n': // newline |
|
|
501 retval[i] = '\n'; |
|
|
502 break; |
|
|
503 |
|
|
504 case 'r': // carriage return |
|
|
505 retval[i] = '\r'; |
|
|
506 break; |
|
|
507 |
|
|
508 case 't': // horizontal tab |
|
|
509 retval[i] = '\t'; |
|
|
510 break; |
|
|
511 |
|
|
512 case 'v': // vertical tab |
|
|
513 retval[i] = '\v'; |
|
|
514 break; |
|
|
515 |
|
|
516 case '\\': // backslash |
|
|
517 retval[i] = '\\'; |
|
|
518 break; |
|
|
519 |
|
|
520 case '\'': // quote |
|
|
521 retval[i] = '\''; |
|
|
522 break; |
|
|
523 |
|
|
524 case '"': // double quote |
|
|
525 retval[i] = '"'; |
|
|
526 break; |
|
|
527 |
|
|
528 default: |
|
|
529 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
530 converting to `%c'", s[j], s[j]); |
|
|
531 retval[i] = s[j]; |
|
|
532 break; |
|
|
533 } |
|
|
534 } |
|
|
535 else |
|
|
536 { |
|
|
537 retval[i] = s[j]; |
|
|
538 } |
|
|
539 |
|
|
540 i++; |
|
|
541 j++; |
|
|
542 } |
|
|
543 |
|
3105
|
544 retval.resize (i); |
|
3103
|
545 |
|
|
546 return retval; |
|
|
547 } |
|
|
548 |
|
|
549 DEFUN (do_string_escapes, args, , |
|
3446
|
550 "-*- texinfo -*-\n\ |
|
|
551 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
|
|
552 Convert special characters in @var{string} to their escaped forms.\n\ |
|
|
553 @end deftypefn") |
|
3103
|
554 { |
|
|
555 octave_value retval; |
|
|
556 |
|
|
557 int nargin = args.length (); |
|
|
558 |
|
|
559 if (nargin == 1) |
|
|
560 { |
|
|
561 if (args(0).is_string ()) |
|
|
562 retval = do_string_escapes (args(0).string_value ()); |
|
|
563 else |
|
|
564 error ("do_string_escapes: argument must be a string"); |
|
|
565 } |
|
|
566 else |
|
5823
|
567 print_usage (); |
|
3103
|
568 |
|
|
569 return retval; |
|
|
570 } |
|
|
571 |
|
1755
|
572 const char * |
|
801
|
573 undo_string_escape (char c) |
|
|
574 { |
|
|
575 if (! c) |
|
1755
|
576 return ""; |
|
801
|
577 |
|
|
578 switch (c) |
|
|
579 { |
|
3893
|
580 case '\0': |
|
|
581 return "\\0"; |
|
|
582 |
|
801
|
583 case '\a': |
|
|
584 return "\\a"; |
|
|
585 |
|
|
586 case '\b': // backspace |
|
|
587 return "\\b"; |
|
|
588 |
|
|
589 case '\f': // formfeed |
|
|
590 return "\\f"; |
|
|
591 |
|
|
592 case '\n': // newline |
|
|
593 return "\\n"; |
|
|
594 |
|
|
595 case '\r': // carriage return |
|
|
596 return "\\r"; |
|
|
597 |
|
|
598 case '\t': // horizontal tab |
|
|
599 return "\\t"; |
|
|
600 |
|
|
601 case '\v': // vertical tab |
|
|
602 return "\\v"; |
|
|
603 |
|
|
604 case '\\': // backslash |
|
|
605 return "\\\\"; |
|
|
606 |
|
|
607 case '"': // double quote |
|
|
608 return "\\\""; |
|
|
609 |
|
|
610 default: |
|
1755
|
611 { |
|
|
612 static char retval[2]; |
|
|
613 retval[0] = c; |
|
|
614 retval[1] = '\0'; |
|
|
615 return retval; |
|
|
616 } |
|
801
|
617 } |
|
|
618 } |
|
|
619 |
|
3536
|
620 std::string |
|
3523
|
621 undo_string_escapes (const std::string& s) |
|
801
|
622 { |
|
3523
|
623 std::string retval; |
|
801
|
624 |
|
1755
|
625 for (size_t i = 0; i < s.length (); i++) |
|
|
626 retval.append (undo_string_escape (s[i])); |
|
801
|
627 |
|
1755
|
628 return retval; |
|
801
|
629 } |
|
|
630 |
|
1957
|
631 DEFUN (undo_string_escapes, args, , |
|
3361
|
632 "-*- texinfo -*-\n\ |
|
|
633 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
634 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
635 example, the expression\n\ |
|
|
636 \n\ |
|
|
637 @example\n\ |
|
|
638 bell = \"\\a\";\n\ |
|
|
639 @end example\n\ |
|
|
640 \n\ |
|
|
641 @noindent\n\ |
|
|
642 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
643 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
644 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
645 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
646 able to print the original representation of the string, with the\n\ |
|
|
647 special characters replaced by their escape sequences. For example,\n\ |
|
|
648 \n\ |
|
|
649 @example\n\ |
|
|
650 octave:13> undo_string_escapes (bell)\n\ |
|
|
651 ans = \\a\n\ |
|
|
652 @end example\n\ |
|
|
653 \n\ |
|
|
654 @noindent\n\ |
|
|
655 replaces the unprintable alert character with its printable\n\ |
|
|
656 representation.\n\ |
|
|
657 @end deftypefn") |
|
801
|
658 { |
|
2086
|
659 octave_value retval; |
|
801
|
660 |
|
|
661 int nargin = args.length (); |
|
|
662 |
|
3103
|
663 if (nargin == 1) |
|
|
664 { |
|
|
665 if (args(0).is_string ()) |
|
|
666 retval = undo_string_escapes (args(0).string_value ()); |
|
|
667 else |
|
|
668 error ("undo_string_escapes: argument must be a string"); |
|
|
669 } |
|
801
|
670 else |
|
5823
|
671 print_usage (); |
|
801
|
672 |
|
|
673 return retval; |
|
|
674 } |
|
|
675 |
|
5465
|
676 DEFUNX ("errno", Ferrno, args, , |
|
3716
|
677 "-*- texinfo -*-\n\ |
|
5465
|
678 @deftypefn {Built-in Function} {@var{err} =} errno ()\n\ |
|
|
679 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{val})\n\ |
|
|
680 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{name})\n\ |
|
|
681 Return the current value of the system-dependent variable errno,\n\ |
|
|
682 set its value to @var{val} and return the previous value, or return\n\ |
|
|
683 the named error code given @var{name} as a character string, or -1\n\ |
|
|
684 if @var{name} is not found.\n\ |
|
3716
|
685 @end deftypefn") |
|
|
686 { |
|
|
687 octave_value retval; |
|
|
688 |
|
5465
|
689 int nargin = args.length (); |
|
|
690 |
|
|
691 if (nargin == 1) |
|
|
692 { |
|
|
693 if (args(0).is_string ()) |
|
|
694 { |
|
|
695 std::string nm = args(0).string_value (); |
|
|
696 |
|
|
697 if (! error_state) |
|
|
698 retval = octave_errno::lookup (nm); |
|
|
699 else |
|
|
700 error ("errno: expecting character string argument"); |
|
|
701 } |
|
|
702 else |
|
|
703 { |
|
|
704 int val = args(0).int_value (); |
|
|
705 |
|
|
706 if (! error_state) |
|
|
707 retval = octave_errno::set (val); |
|
|
708 else |
|
|
709 error ("errno: expecting integer argument"); |
|
|
710 } |
|
|
711 } |
|
|
712 else if (nargin == 0) |
|
|
713 retval = octave_errno::get (); |
|
3716
|
714 else |
|
5823
|
715 print_usage (); |
|
3716
|
716 |
|
|
717 return retval; |
|
|
718 } |
|
|
719 |
|
5465
|
720 DEFUN (errno_list, args, , |
|
|
721 "-*- texinfo -*-\n\ |
|
|
722 @deftypefn {Built-in Function} {} errno_list ()\n\ |
|
|
723 Return a structure containing the system-dependent errno values.\n\ |
|
|
724 @end deftypefn") |
|
|
725 { |
|
|
726 octave_value retval; |
|
|
727 |
|
|
728 if (args.length () == 0) |
|
|
729 retval = octave_errno::list (); |
|
|
730 else |
|
5823
|
731 print_usage (); |
|
5465
|
732 |
|
|
733 return retval; |
|
|
734 } |
|
3716
|
735 |
|
2285
|
736 static void |
|
5275
|
737 check_dimensions (octave_idx_type& nr, octave_idx_type& nc, const char *warnfor) |
|
3354
|
738 { |
|
|
739 if (nr < 0 || nc < 0) |
|
|
740 { |
|
5781
|
741 warning_with_id ("Octave:neg-dim-as-zero", |
|
|
742 "%s: converting negative dimension to zero", warnfor); |
|
3354
|
743 |
|
4457
|
744 nr = (nr < 0) ? 0 : nr; |
|
|
745 nc = (nc < 0) ? 0 : nc; |
|
3354
|
746 } |
|
|
747 } |
|
|
748 |
|
|
749 void |
|
4513
|
750 check_dimensions (dim_vector& dim, const char *warnfor) |
|
4481
|
751 { |
|
|
752 bool neg = false; |
|
|
753 |
|
|
754 for (int i = 0; i < dim.length (); i++) |
|
|
755 { |
|
|
756 if (dim(i) < 0) |
|
|
757 { |
|
|
758 dim(i) = 0; |
|
|
759 neg = true; |
|
|
760 } |
|
|
761 } |
|
|
762 |
|
5781
|
763 if (neg) |
|
|
764 warning_with_id ("Octave:neg-dim-as-zero", |
|
|
765 "%s: converting negative dimension to zero", warnfor); |
|
4481
|
766 } |
|
|
767 |
|
|
768 |
|
|
769 void |
|
|
770 get_dimensions (const octave_value& a, const char *warn_for, |
|
4513
|
771 dim_vector& dim) |
|
4481
|
772 { |
|
|
773 if (a.is_scalar_type ()) |
|
|
774 { |
|
|
775 dim.resize (2); |
|
4732
|
776 dim(0) = a.int_value (); |
|
4481
|
777 dim(1) = dim(0); |
|
|
778 } |
|
|
779 else |
|
|
780 { |
|
5275
|
781 octave_idx_type nr = a.rows (); |
|
|
782 octave_idx_type nc = a.columns (); |
|
4481
|
783 |
|
|
784 if (nr == 1 || nc == 1) |
|
|
785 { |
|
|
786 Array<double> v = a.vector_value (); |
|
|
787 |
|
|
788 if (error_state) |
|
|
789 return; |
|
|
790 |
|
5275
|
791 octave_idx_type n = v.length (); |
|
4481
|
792 dim.resize (n); |
|
5275
|
793 for (octave_idx_type i = 0; i < n; i++) |
|
4783
|
794 dim(i) = static_cast<int> (fix (v(i))); |
|
4481
|
795 } |
|
|
796 else |
|
5257
|
797 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
4481
|
798 } |
|
|
799 |
|
5258
|
800 if (! error_state) |
|
|
801 check_dimensions (dim, warn_for); // May set error_state. |
|
4481
|
802 } |
|
|
803 |
|
|
804 |
|
|
805 void |
|
3354
|
806 get_dimensions (const octave_value& a, const char *warn_for, |
|
5275
|
807 octave_idx_type& nr, octave_idx_type& nc) |
|
3354
|
808 { |
|
|
809 if (a.is_scalar_type ()) |
|
|
810 { |
|
4732
|
811 nr = nc = a.int_value (); |
|
3354
|
812 } |
|
|
813 else |
|
|
814 { |
|
|
815 nr = a.rows (); |
|
|
816 nc = a.columns (); |
|
|
817 |
|
|
818 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
819 { |
|
3419
|
820 Array<double> v = a.vector_value (); |
|
3354
|
821 |
|
|
822 if (error_state) |
|
|
823 return; |
|
|
824 |
|
5275
|
825 nr = static_cast<octave_idx_type> (fix (v (0))); |
|
|
826 nc = static_cast<octave_idx_type> (fix (v (1))); |
|
3354
|
827 } |
|
|
828 else |
|
5257
|
829 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
3354
|
830 } |
|
|
831 |
|
5258
|
832 if (! error_state) |
|
|
833 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
3354
|
834 } |
|
|
835 |
|
|
836 void |
|
|
837 get_dimensions (const octave_value& a, const octave_value& b, |
|
5275
|
838 const char *warn_for, octave_idx_type& nr, octave_idx_type& nc) |
|
3354
|
839 { |
|
4732
|
840 nr = a.is_empty () ? 0 : a.int_value (); |
|
|
841 nc = b.is_empty () ? 0 : b.int_value (); |
|
3354
|
842 |
|
|
843 if (error_state) |
|
|
844 error ("%s: expecting two scalar arguments", warn_for); |
|
|
845 else |
|
|
846 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
847 } |
|
|
848 |
|
4478
|
849 Matrix |
|
5275
|
850 identity_matrix (octave_idx_type nr, octave_idx_type nc) |
|
4478
|
851 { |
|
|
852 Matrix m (nr, nc, 0.0); |
|
|
853 |
|
|
854 if (nr > 0 && nc > 0) |
|
|
855 { |
|
5275
|
856 octave_idx_type n = std::min (nr, nc); |
|
4478
|
857 |
|
5275
|
858 for (octave_idx_type i = 0; i < n; i++) |
|
4478
|
859 m (i, i) = 1.0; |
|
|
860 } |
|
|
861 |
|
|
862 return m; |
|
|
863 } |
|
|
864 |
|
3620
|
865 extern int |
|
3622
|
866 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
867 { |
|
|
868 int retval = -1; |
|
|
869 |
|
|
870 va_list args; |
|
|
871 va_start (args, fmt); |
|
|
872 |
|
|
873 retval = octave_vformat (os, fmt, args); |
|
|
874 |
|
|
875 va_end (args); |
|
|
876 |
|
|
877 return retval; |
|
|
878 } |
|
|
879 |
|
|
880 extern int |
|
3622
|
881 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
882 { |
|
|
883 int retval = -1; |
|
|
884 |
|
3775
|
885 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
|
3620
|
886 |
|
4135
|
887 std::streambuf *sb = os.rdbuf (); |
|
|
888 |
|
|
889 if (sb) |
|
4302
|
890 { |
|
|
891 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
892 |
|
|
893 retval = sb->vform (fmt, args); |
|
|
894 |
|
|
895 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
896 } |
|
3620
|
897 |
|
|
898 #else |
|
|
899 |
|
|
900 char *s = octave_vsnprintf (fmt, args); |
|
|
901 |
|
|
902 if (s) |
|
|
903 { |
|
|
904 os << s; |
|
|
905 |
|
|
906 retval = strlen (s); |
|
|
907 } |
|
|
908 |
|
|
909 #endif |
|
|
910 |
|
|
911 return retval; |
|
|
912 } |
|
|
913 |
|
5775
|
914 /* FIXME -- we really need a configure test for this. */ |
|
4302
|
915 |
|
|
916 #if defined __GNUC__ && __GNUC__ >= 3 |
|
|
917 #define HAVE_C99_VSNPRINTF 1 |
|
|
918 #endif |
|
|
919 |
|
|
920 // We manage storage. User should not free it, and its contents are |
|
|
921 // only valid until next call to vsnprintf. |
|
|
922 |
|
|
923 // Interrupts might happen if someone makes a call with something that |
|
|
924 // will require a very large buffer. If we are interrupted in that |
|
|
925 // case, we should make the buffer size smaller for the next call. |
|
|
926 |
|
|
927 #define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF \ |
|
|
928 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1; \ |
|
|
929 delete [] buf; \ |
|
|
930 buf = 0; \ |
|
|
931 size = initial_size; \ |
|
|
932 octave_throw_interrupt_exception (); \ |
|
|
933 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2 |
|
|
934 |
|
4485
|
935 #if defined __GNUC__ && defined __va_copy |
|
|
936 #define SAVE_ARGS(saved_args, args) __va_copy (saved_args, args) |
|
|
937 #elif defined va_copy |
|
|
938 #define SAVE_ARGS(saved_args, args) va_copy (saved_args, args) |
|
|
939 #else |
|
|
940 #define SAVE_ARGS(saved_args, args) saved_args = args |
|
|
941 #endif |
|
|
942 |
|
4302
|
943 char * |
|
|
944 octave_vsnprintf (const char *fmt, va_list args) |
|
|
945 { |
|
|
946 static const size_t initial_size = 100; |
|
|
947 |
|
|
948 static size_t size = initial_size; |
|
|
949 |
|
|
950 static char *buf = 0; |
|
|
951 |
|
4482
|
952 #if defined (HAVE_C99_VSNPRINTF) |
|
|
953 size_t nchars; |
|
|
954 #else |
|
4351
|
955 int nchars; |
|
4482
|
956 #endif |
|
4302
|
957 |
|
|
958 if (! buf) |
|
|
959 buf = new char [size]; |
|
|
960 |
|
|
961 if (! buf) |
|
|
962 return 0; |
|
|
963 |
|
|
964 #if defined (HAVE_C99_VSNPRINTF) |
|
|
965 |
|
4485
|
966 // Note that the caller is responsible for calling va_end on args. |
|
|
967 // We will do it for saved_args. |
|
|
968 |
|
|
969 va_list saved_args; |
|
|
970 |
|
|
971 SAVE_ARGS (saved_args, args); |
|
|
972 |
|
4302
|
973 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
974 |
|
|
975 nchars = octave_raw_vsnprintf (buf, size, fmt, args); |
|
|
976 |
|
|
977 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
978 |
|
|
979 if (nchars >= size) |
|
|
980 { |
|
|
981 size = nchars + 1; |
|
|
982 |
|
|
983 delete [] buf; |
|
|
984 |
|
|
985 buf = new char [size]; |
|
|
986 |
|
|
987 if (buf) |
|
|
988 { |
|
|
989 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
990 |
|
4485
|
991 octave_raw_vsnprintf (buf, size, fmt, saved_args); |
|
4302
|
992 |
|
|
993 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
994 } |
|
|
995 } |
|
|
996 |
|
4485
|
997 va_end (saved_args); |
|
|
998 |
|
4302
|
999 #else |
|
|
1000 |
|
|
1001 while (1) |
|
|
1002 { |
|
4485
|
1003 va_list saved_args; |
|
|
1004 |
|
|
1005 SAVE_ARGS (saved_args, args); |
|
|
1006 |
|
4302
|
1007 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1008 |
|
4485
|
1009 nchars = octave_raw_vsnprintf (buf, size, fmt, saved_args); |
|
|
1010 |
|
|
1011 va_end (saved_args); |
|
4302
|
1012 |
|
|
1013 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1014 |
|
4351
|
1015 if (nchars > -1 && nchars < size-1) |
|
4302
|
1016 return buf; |
|
|
1017 else |
|
|
1018 { |
|
|
1019 delete [] buf; |
|
|
1020 |
|
|
1021 size *= 2; |
|
|
1022 |
|
|
1023 buf = new char [size]; |
|
|
1024 |
|
|
1025 if (! buf) |
|
|
1026 return 0; |
|
|
1027 } |
|
|
1028 } |
|
|
1029 |
|
|
1030 #endif |
|
|
1031 |
|
|
1032 return buf; |
|
|
1033 } |
|
|
1034 |
|
|
1035 char * |
|
|
1036 octave_snprintf (const char *fmt, ...) |
|
|
1037 { |
|
|
1038 char *retval = 0; |
|
|
1039 |
|
|
1040 va_list args; |
|
|
1041 va_start (args, fmt); |
|
|
1042 |
|
|
1043 retval = octave_vsnprintf (fmt, args); |
|
|
1044 |
|
|
1045 va_end (args); |
|
|
1046 |
|
|
1047 return retval; |
|
|
1048 } |
|
|
1049 |
|
4086
|
1050 void |
|
|
1051 octave_sleep (double seconds) |
|
|
1052 { |
|
|
1053 if (seconds > 0) |
|
|
1054 { |
|
|
1055 double t; |
|
|
1056 |
|
4093
|
1057 unsigned int usec |
|
4783
|
1058 = static_cast<unsigned int> (modf (seconds, &t) * 1000000); |
|
4086
|
1059 |
|
4093
|
1060 unsigned int sec |
|
4783
|
1061 = (t > UINT_MAX) ? UINT_MAX : static_cast<unsigned int> (t); |
|
4086
|
1062 |
|
5770
|
1063 // Versions of these functions that accept unsigned int args are |
|
|
1064 // defined in cutils.c. |
|
4086
|
1065 octave_sleep (sec); |
|
|
1066 octave_usleep (usec); |
|
|
1067 } |
|
|
1068 } |
|
|
1069 |
|
572
|
1070 /* |
|
1
|
1071 ;;; Local Variables: *** |
|
|
1072 ;;; mode: C++ *** |
|
|
1073 ;;; End: *** |
|
|
1074 */ |
