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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
|
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
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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
|
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
|
52 #include "str-vec.h" |
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1651
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53 |
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4216
|
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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5465
|
61 #include "oct-errno.h" |
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1742
|
62 #include "oct-hist.h" |
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1750
|
63 #include "oct-obj.h" |
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1352
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64 #include "pager.h" |
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1690
|
65 #include "sysdep.h" |
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1750
|
66 #include "toplev.h" |
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1
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67 #include "unwind-prot.h" |
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1352
|
68 #include "utils.h" |
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69 #include "variables.h" |
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1
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70 |
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4143
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71 // Return TRUE if S is a valid identifier. |
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72 |
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73 bool |
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74 valid_identifier (const char *s) |
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75 { |
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5290
|
76 if (! s || ! (isalpha (*s) || *s == '_' || *s == '$')) |
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4143
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77 return false; |
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78 |
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79 while (*++s != '\0') |
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5290
|
80 if (! (isalnum (*s) || *s == '_' || *s == '$')) |
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4143
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81 return false; |
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82 |
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83 return true; |
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84 } |
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85 |
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86 bool |
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87 valid_identifier (const std::string& s) |
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88 { |
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89 return valid_identifier (s.c_str ()); |
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90 } |
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91 |
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4264
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92 DEFCMD (isvarname, args, , |
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5040
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93 "-*- texinfo -*-\n\ |
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94 @deftypefn {Built-in Function} {} isvarname (@var{name})\n\ |
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4264
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95 Return true if @var{name} is a valid variable name\n\ |
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96 @end deftypefn") |
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97 { |
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98 octave_value retval; |
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99 |
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100 int argc = args.length () + 1; |
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101 |
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4610
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102 string_vector argv = args.make_argv ("isvarname"); |
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4264
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103 |
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104 if (error_state) |
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105 return retval; |
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106 |
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107 if (argc == 2) |
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108 retval = valid_identifier (argv[1]); |
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109 else |
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110 print_usage ("isvarname"); |
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111 |
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112 return retval; |
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113 } |
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114 |
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1
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115 int |
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3523
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116 almost_match (const std::string& std, const std::string& s, int min_match_len, |
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526
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117 int case_sens) |
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1
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118 { |
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1755
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119 int stdlen = std.length (); |
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120 int slen = s.length (); |
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1
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121 |
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122 return (slen <= stdlen |
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123 && slen >= min_match_len |
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287
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124 && (case_sens |
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1755
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125 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
|
126 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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127 } |
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128 |
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581
|
129 // Ugh. |
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130 |
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287
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131 int |
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3523
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132 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
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287
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133 int min_toks_to_match, int max_toks) |
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134 { |
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135 int status = 0; |
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136 int tok_count = 0; |
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137 int toks_matched = 0; |
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138 |
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1755
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139 if (s.empty () || max_toks < 1) |
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287
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140 return status; |
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141 |
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1755
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142 char *kw = strsave (s.c_str ()); |
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287
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143 |
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144 char *t = kw; |
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145 while (*t != '\0') |
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146 { |
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147 if (*t == '\t') |
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148 *t = ' '; |
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149 t++; |
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150 } |
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151 |
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152 char *beg = kw; |
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153 while (*beg == ' ') |
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154 beg++; |
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155 |
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156 if (*beg == '\0') |
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157 return status; |
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158 |
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159 |
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3072
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160 const char **to_match = new const char * [max_toks + 1]; |
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161 const char * const *s1 = std; |
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162 const char **s2 = to_match; |
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287
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163 |
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526
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164 if (! s1 || ! s2) |
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287
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165 goto done; |
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166 |
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167 s2[tok_count] = beg; |
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168 char *end; |
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526
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169 while ((end = strchr (beg, ' ')) != 0) |
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287
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170 { |
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171 *end = '\0'; |
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172 beg = end + 1; |
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173 |
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174 while (*beg == ' ') |
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175 beg++; |
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176 |
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177 if (*beg == '\0') |
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178 break; |
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179 |
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180 tok_count++; |
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181 if (tok_count >= max_toks) |
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182 goto done; |
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183 |
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184 s2[tok_count] = beg; |
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185 } |
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526
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186 s2[tok_count+1] = 0; |
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287
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187 |
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188 s2 = to_match; |
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189 |
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190 for (;;) |
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191 { |
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192 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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193 goto done; |
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194 |
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195 toks_matched++; |
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196 |
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197 s1++; |
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198 s2++; |
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199 |
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200 if (! *s2) |
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201 { |
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202 status = (toks_matched >= min_toks_to_match); |
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203 goto done; |
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204 } |
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205 |
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206 if (! *s1) |
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207 goto done; |
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208 } |
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209 |
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210 done: |
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211 |
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212 delete [] kw; |
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213 delete [] to_match; |
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214 |
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215 return status; |
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1
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216 } |
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217 |
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2234
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218 // Return non-zero if either NR or NC is zero. Return -1 if this |
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219 // should be considered fatal; return 1 if this is ok. |
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220 |
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221 int |
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5275
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222 empty_arg (const char * /* name */, octave_idx_type nr, octave_idx_type nc) |
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2234
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223 { |
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4478
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224 return (nr == 0 || nc == 0); |
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2234
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225 } |
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226 |
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581
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227 // See if the given file is in the path. |
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228 |
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3536
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229 std::string |
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4243
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230 search_path_for_file (const std::string& path, const string_vector& names) |
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686
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231 { |
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3174
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232 dir_path p (path); |
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686
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233 |
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4243
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234 return octave_env::make_absolute (p.find_first_of (names), |
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235 octave_env::getcwd ()); |
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686
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236 } |
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237 |
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4216
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238 // Find all locations of the given file in the path. |
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239 |
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240 string_vector |
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4243
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241 search_path_for_all_files (const std::string& path, const string_vector& names) |
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4216
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242 { |
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243 dir_path p (path); |
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244 |
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4243
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245 string_vector sv = p.find_all_first_of (names); |
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4216
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246 |
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247 int len = sv.length (); |
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248 |
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249 for (int i = 0; i < len; i++) |
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250 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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251 |
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252 return sv; |
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253 } |
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254 |
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255 static string_vector |
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256 make_absolute (const string_vector& sv) |
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257 { |
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258 int len = sv.length (); |
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259 |
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260 for (int i = 0; i < len; i++) |
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261 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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262 |
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263 return sv; |
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264 } |
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265 |
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3195
|
266 DEFUN (file_in_loadpath, args, , |
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3446
|
267 "-*- texinfo -*-\n\ |
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4216
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268 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
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269 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ |
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3195
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270 \n\ |
|
5448
|
271 Return the absolute name of @var{file} if it can be found in\n\ |
|
4216
|
272 the list of directories specified by @code{LOADPATH}.\n\ |
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273 If no file is found, return an empty matrix.\n\ |
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274 \n\ |
|
5448
|
275 If the first argument is a cell array of strings, search each\n\ |
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4243
|
276 directory of the loadpath for element of the cell array and return\n\ |
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277 the first that matches.\n\ |
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278 \n\ |
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4216
|
279 If the second optional argument @code{\"all\"} is supplied, return\n\ |
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280 a cell array containing the list of all files that have the same\n\ |
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281 name in the path. If no files are found, return an empty cell array.\n\ |
|
5642
|
282 @seealso{file_in_path, LOADPATH}\n\ |
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283 @end deftypefn") |
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3195
|
284 { |
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4216
|
285 octave_value retval; |
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3195
|
286 |
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4243
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287 int nargin = args.length (); |
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3195
|
288 |
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4243
|
289 if (nargin == 1 || nargin == 2) |
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4216
|
290 { |
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4243
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291 string_vector names = args(0).all_strings (); |
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292 |
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293 if (! error_state && names.length () > 0) |
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294 { |
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295 if (nargin == 1) |
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296 { |
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297 std::string fname = octave_env::make_absolute |
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298 (Vload_path_dir_path.find_first_of (names), |
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299 octave_env::getcwd ()); |
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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 |
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310 if (! error_state && opt == "all") |
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311 retval = Cell (make_absolute (Vload_path_dir_path.find_all_first_of (names))); |
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312 else |
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4249
|
313 error ("file_in_loadpath: invalid option"); |
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4243
|
314 } |
|
|
315 } |
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4216
|
316 else |
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4243
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317 error ("file_in_loadpath: expecting string as first argument"); |
|
4216
|
318 } |
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3195
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319 else |
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320 print_usage ("file_in_loadpath"); |
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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\ |
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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\ |
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|
331 directories in the format described for the built-in variable\n\ |
|
4216
|
332 @code{LOADPATH}. If no file is found, return an empty matrix.\n\ |
|
3301
|
333 For example,\n\ |
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334 \n\ |
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335 @example\n\ |
|
5456
|
336 file_in_path (EXEC_PATH, \"sh\")\n\ |
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337 @result{} \"/bin/sh\"\n\ |
|
3301
|
338 @end example\n\ |
|
4216
|
339 \n\ |
|
5448
|
340 If the second argument is a cell array of strings, search each\n\ |
|
4243
|
341 directory of the path for element of the cell array and return\n\ |
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|
342 the first that matches.\n\ |
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343 \n\ |
|
4216
|
344 If the third optional argument @code{\"all\"} is supplied, return\n\ |
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345 a cell array containing the list of all files that have the same\n\ |
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346 name in the path. If no files are found, return an empty cell array.\n\ |
|
5456
|
347 \n\ |
|
5458
|
348 Note that @code{file_in_path} does not expand leading, trailing,\n\ |
|
5456
|
349 or doubled colons the way that @code{file_in_loadpath} does. See\n\ |
|
5480
|
350 also @xref{Function Files}, for an explanation of\n\ |
|
5478
|
351 how colon expansion is applied to @code{LOADPATH}.\n\ |
|
4249
|
352 @seealso{file_in_loadpath}\n\ |
|
3301
|
353 @end deftypefn") |
|
686
|
354 { |
|
4216
|
355 octave_value retval; |
|
686
|
356 |
|
4243
|
357 int nargin = args.length (); |
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1755
|
358 |
|
4243
|
359 if (nargin == 2 || nargin == 3) |
|
686
|
360 { |
|
4243
|
361 std::string path = args(0).string_value (); |
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|
362 |
|
|
363 if (! error_state) |
|
|
364 { |
|
4249
|
365 string_vector names = args(1).all_strings (); |
|
4243
|
366 |
|
|
367 if (! error_state && names.length () > 0) |
|
|
368 { |
|
|
369 if (nargin == 2) |
|
|
370 { |
|
|
371 std::string fname = search_path_for_file (path, names); |
|
686
|
372 |
|
4243
|
373 if (fname.empty ()) |
|
|
374 retval = Matrix (); |
|
|
375 else |
|
|
376 retval = fname; |
|
|
377 } |
|
|
378 else if (nargin == 3) |
|
|
379 { |
|
4249
|
380 std::string opt = args(2).string_value (); |
|
4243
|
381 |
|
|
382 if (! error_state && opt == "all") |
|
|
383 retval = Cell (make_absolute (search_path_for_all_files (path, names))); |
|
|
384 else |
|
4249
|
385 error ("file_in_path: invalid option"); |
|
4243
|
386 } |
|
|
387 } |
|
|
388 else |
|
|
389 error ("file_in_path: expecting string as second argument"); |
|
|
390 } |
|
1755
|
391 else |
|
4243
|
392 error ("file_in_path: expecting string as first argument"); |
|
686
|
393 } |
|
|
394 else |
|
|
395 print_usage ("file_in_path"); |
|
|
396 |
|
|
397 return retval; |
|
|
398 } |
|
|
399 |
|
3536
|
400 std::string |
|
3523
|
401 file_in_path (const std::string& name, const std::string& suffix) |
|
526
|
402 { |
|
3523
|
403 std::string nm = name; |
|
526
|
404 |
|
1755
|
405 if (! suffix.empty ()) |
|
|
406 nm.append (suffix); |
|
686
|
407 |
|
3174
|
408 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
|
|
409 octave_env::getcwd ()); |
|
526
|
410 } |
|
|
411 |
|
581
|
412 // See if there is an function file in the path. If so, return the |
|
|
413 // full path to the file. |
|
|
414 |
|
3536
|
415 std::string |
|
3523
|
416 fcn_file_in_path (const std::string& name) |
|
526
|
417 { |
|
3523
|
418 std::string retval; |
|
908
|
419 |
|
1755
|
420 int len = name.length (); |
|
|
421 |
|
|
422 if (len > 0) |
|
|
423 { |
|
|
424 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
425 retval = file_in_path (name, ""); |
|
908
|
426 else |
|
1755
|
427 retval = file_in_path (name, ".m"); |
|
908
|
428 } |
|
1755
|
429 |
|
|
430 return retval; |
|
526
|
431 } |
|
|
432 |
|
581
|
433 // See if there is an octave file in the path. If so, return the |
|
|
434 // full path to the file. |
|
|
435 |
|
3536
|
436 std::string |
|
3523
|
437 oct_file_in_path (const std::string& name) |
|
572
|
438 { |
|
3523
|
439 std::string retval; |
|
908
|
440 |
|
1755
|
441 int len = name.length (); |
|
|
442 |
|
|
443 if (len > 0) |
|
|
444 { |
|
5612
|
445 if (len > 4 && name [len - 4] == '.' && name [len - 3] == 'o' |
|
908
|
446 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
1755
|
447 retval = file_in_path (name, ""); |
|
908
|
448 else |
|
1755
|
449 retval = file_in_path (name, ".oct"); |
|
908
|
450 } |
|
1755
|
451 |
|
|
452 return retval; |
|
572
|
453 } |
|
|
454 |
|
3103
|
455 // Replace backslash escapes in a string with the real values. |
|
|
456 |
|
3536
|
457 std::string |
|
3523
|
458 do_string_escapes (const std::string& s) |
|
3103
|
459 { |
|
3523
|
460 std::string retval; |
|
3103
|
461 |
|
|
462 size_t i = 0; |
|
|
463 size_t j = 0; |
|
|
464 size_t len = s.length (); |
|
|
465 |
|
|
466 retval.resize (len); |
|
|
467 |
|
|
468 while (j < len) |
|
|
469 { |
|
|
470 if (s[j] == '\\' && j+1 < len) |
|
|
471 { |
|
|
472 switch (s[++j]) |
|
|
473 { |
|
3893
|
474 case '0': |
|
|
475 retval[i] = '\0'; |
|
|
476 break; |
|
|
477 |
|
3103
|
478 case 'a': |
|
|
479 retval[i] = '\a'; |
|
|
480 break; |
|
|
481 |
|
|
482 case 'b': // backspace |
|
|
483 retval[i] = '\b'; |
|
|
484 break; |
|
|
485 |
|
|
486 case 'f': // formfeed |
|
|
487 retval[i] = '\f'; |
|
|
488 break; |
|
|
489 |
|
|
490 case 'n': // newline |
|
|
491 retval[i] = '\n'; |
|
|
492 break; |
|
|
493 |
|
|
494 case 'r': // carriage return |
|
|
495 retval[i] = '\r'; |
|
|
496 break; |
|
|
497 |
|
|
498 case 't': // horizontal tab |
|
|
499 retval[i] = '\t'; |
|
|
500 break; |
|
|
501 |
|
|
502 case 'v': // vertical tab |
|
|
503 retval[i] = '\v'; |
|
|
504 break; |
|
|
505 |
|
|
506 case '\\': // backslash |
|
|
507 retval[i] = '\\'; |
|
|
508 break; |
|
|
509 |
|
|
510 case '\'': // quote |
|
|
511 retval[i] = '\''; |
|
|
512 break; |
|
|
513 |
|
|
514 case '"': // double quote |
|
|
515 retval[i] = '"'; |
|
|
516 break; |
|
|
517 |
|
|
518 default: |
|
|
519 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
520 converting to `%c'", s[j], s[j]); |
|
|
521 retval[i] = s[j]; |
|
|
522 break; |
|
|
523 } |
|
|
524 } |
|
|
525 else |
|
|
526 { |
|
|
527 retval[i] = s[j]; |
|
|
528 } |
|
|
529 |
|
|
530 i++; |
|
|
531 j++; |
|
|
532 } |
|
|
533 |
|
3105
|
534 retval.resize (i); |
|
3103
|
535 |
|
|
536 return retval; |
|
|
537 } |
|
|
538 |
|
|
539 DEFUN (do_string_escapes, args, , |
|
3446
|
540 "-*- texinfo -*-\n\ |
|
|
541 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
|
|
542 Convert special characters in @var{string} to their escaped forms.\n\ |
|
|
543 @end deftypefn") |
|
3103
|
544 { |
|
|
545 octave_value retval; |
|
|
546 |
|
|
547 int nargin = args.length (); |
|
|
548 |
|
|
549 if (nargin == 1) |
|
|
550 { |
|
|
551 if (args(0).is_string ()) |
|
|
552 retval = do_string_escapes (args(0).string_value ()); |
|
|
553 else |
|
|
554 error ("do_string_escapes: argument must be a string"); |
|
|
555 } |
|
|
556 else |
|
|
557 print_usage ("do_string_escapes"); |
|
|
558 |
|
|
559 return retval; |
|
|
560 } |
|
|
561 |
|
1755
|
562 const char * |
|
801
|
563 undo_string_escape (char c) |
|
|
564 { |
|
|
565 if (! c) |
|
1755
|
566 return ""; |
|
801
|
567 |
|
|
568 switch (c) |
|
|
569 { |
|
3893
|
570 case '\0': |
|
|
571 return "\\0"; |
|
|
572 |
|
801
|
573 case '\a': |
|
|
574 return "\\a"; |
|
|
575 |
|
|
576 case '\b': // backspace |
|
|
577 return "\\b"; |
|
|
578 |
|
|
579 case '\f': // formfeed |
|
|
580 return "\\f"; |
|
|
581 |
|
|
582 case '\n': // newline |
|
|
583 return "\\n"; |
|
|
584 |
|
|
585 case '\r': // carriage return |
|
|
586 return "\\r"; |
|
|
587 |
|
|
588 case '\t': // horizontal tab |
|
|
589 return "\\t"; |
|
|
590 |
|
|
591 case '\v': // vertical tab |
|
|
592 return "\\v"; |
|
|
593 |
|
|
594 case '\\': // backslash |
|
|
595 return "\\\\"; |
|
|
596 |
|
|
597 case '"': // double quote |
|
|
598 return "\\\""; |
|
|
599 |
|
|
600 default: |
|
1755
|
601 { |
|
|
602 static char retval[2]; |
|
|
603 retval[0] = c; |
|
|
604 retval[1] = '\0'; |
|
|
605 return retval; |
|
|
606 } |
|
801
|
607 } |
|
|
608 } |
|
|
609 |
|
3536
|
610 std::string |
|
3523
|
611 undo_string_escapes (const std::string& s) |
|
801
|
612 { |
|
3523
|
613 std::string retval; |
|
801
|
614 |
|
1755
|
615 for (size_t i = 0; i < s.length (); i++) |
|
|
616 retval.append (undo_string_escape (s[i])); |
|
801
|
617 |
|
1755
|
618 return retval; |
|
801
|
619 } |
|
|
620 |
|
1957
|
621 DEFUN (undo_string_escapes, args, , |
|
3361
|
622 "-*- texinfo -*-\n\ |
|
|
623 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
624 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
625 example, the expression\n\ |
|
|
626 \n\ |
|
|
627 @example\n\ |
|
|
628 bell = \"\\a\";\n\ |
|
|
629 @end example\n\ |
|
|
630 \n\ |
|
|
631 @noindent\n\ |
|
|
632 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
633 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
634 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
635 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
636 able to print the original representation of the string, with the\n\ |
|
|
637 special characters replaced by their escape sequences. For example,\n\ |
|
|
638 \n\ |
|
|
639 @example\n\ |
|
|
640 octave:13> undo_string_escapes (bell)\n\ |
|
|
641 ans = \\a\n\ |
|
|
642 @end example\n\ |
|
|
643 \n\ |
|
|
644 @noindent\n\ |
|
|
645 replaces the unprintable alert character with its printable\n\ |
|
|
646 representation.\n\ |
|
|
647 @end deftypefn") |
|
801
|
648 { |
|
2086
|
649 octave_value retval; |
|
801
|
650 |
|
|
651 int nargin = args.length (); |
|
|
652 |
|
3103
|
653 if (nargin == 1) |
|
|
654 { |
|
|
655 if (args(0).is_string ()) |
|
|
656 retval = undo_string_escapes (args(0).string_value ()); |
|
|
657 else |
|
|
658 error ("undo_string_escapes: argument must be a string"); |
|
|
659 } |
|
801
|
660 else |
|
1023
|
661 print_usage ("undo_string_escapes"); |
|
801
|
662 |
|
|
663 return retval; |
|
|
664 } |
|
|
665 |
|
4243
|
666 DEFUN (find_first_of_in_loadpath, args, , "") |
|
|
667 { |
|
|
668 octave_value retval; |
|
|
669 |
|
|
670 if (args.length () == 1) |
|
|
671 { |
|
|
672 string_vector names = args(0).all_strings (); |
|
|
673 |
|
|
674 if (! error_state) |
|
|
675 retval = Vload_path_dir_path.find_all_first_of (names); |
|
|
676 } |
|
|
677 else |
|
|
678 print_usage ("find_first_of_in_loadpath"); |
|
|
679 |
|
|
680 return retval; |
|
|
681 } |
|
|
682 |
|
5465
|
683 DEFUNX ("errno", Ferrno, args, , |
|
3716
|
684 "-*- texinfo -*-\n\ |
|
5465
|
685 @deftypefn {Built-in Function} {@var{err} =} errno ()\n\ |
|
|
686 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{val})\n\ |
|
|
687 @deftypefnx {Built-in Function} {@var{err} =} errno (@var{name})\n\ |
|
|
688 Return the current value of the system-dependent variable errno,\n\ |
|
|
689 set its value to @var{val} and return the previous value, or return\n\ |
|
|
690 the named error code given @var{name} as a character string, or -1\n\ |
|
|
691 if @var{name} is not found.\n\ |
|
3716
|
692 @end deftypefn") |
|
|
693 { |
|
|
694 octave_value retval; |
|
|
695 |
|
5465
|
696 int nargin = args.length (); |
|
|
697 |
|
|
698 if (nargin == 1) |
|
|
699 { |
|
|
700 if (args(0).is_string ()) |
|
|
701 { |
|
|
702 std::string nm = args(0).string_value (); |
|
|
703 |
|
|
704 if (! error_state) |
|
|
705 retval = octave_errno::lookup (nm); |
|
|
706 else |
|
|
707 error ("errno: expecting character string argument"); |
|
|
708 } |
|
|
709 else |
|
|
710 { |
|
|
711 int val = args(0).int_value (); |
|
|
712 |
|
|
713 if (! error_state) |
|
|
714 retval = octave_errno::set (val); |
|
|
715 else |
|
|
716 error ("errno: expecting integer argument"); |
|
|
717 } |
|
|
718 } |
|
|
719 else if (nargin == 0) |
|
|
720 retval = octave_errno::get (); |
|
3716
|
721 else |
|
|
722 print_usage ("errno"); |
|
|
723 |
|
|
724 return retval; |
|
|
725 } |
|
|
726 |
|
5465
|
727 DEFUN (errno_list, args, , |
|
|
728 "-*- texinfo -*-\n\ |
|
|
729 @deftypefn {Built-in Function} {} errno_list ()\n\ |
|
|
730 Return a structure containing the system-dependent errno values.\n\ |
|
|
731 @end deftypefn") |
|
|
732 { |
|
|
733 octave_value retval; |
|
|
734 |
|
|
735 if (args.length () == 0) |
|
|
736 retval = octave_errno::list (); |
|
|
737 else |
|
|
738 print_usage ("errno_list"); |
|
|
739 |
|
|
740 return retval; |
|
|
741 } |
|
3716
|
742 |
|
2285
|
743 static void |
|
3523
|
744 warn_old_style_preference (bool val, const std::string& sval) |
|
2285
|
745 { |
|
|
746 warning |
|
|
747 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
748 sval.c_str (), (val ? 1 : 0)); |
|
|
749 } |
|
|
750 |
|
2204
|
751 // Check the value of a string variable to see if it it's ok to do |
|
|
752 // something. |
|
|
753 // |
|
|
754 // return of 1 => always ok. |
|
|
755 // return of 0 => never ok. |
|
|
756 // return of -1 => ok, but give me warning (default). |
|
|
757 |
|
|
758 int |
|
3523
|
759 check_preference (const std::string& var) |
|
2204
|
760 { |
|
|
761 int pref = -1; |
|
|
762 |
|
3523
|
763 std::string val = builtin_string_variable (var); |
|
2204
|
764 |
|
|
765 if (val.empty ()) |
|
|
766 { |
|
|
767 double dval = 0; |
|
|
768 if (builtin_real_scalar_variable (var, dval)) |
|
|
769 pref = NINT (dval); |
|
|
770 } |
|
|
771 else |
|
|
772 { |
|
3565
|
773 if (val == "yes" || val == "true") |
|
2285
|
774 { |
|
|
775 warn_old_style_preference (true, val); |
|
|
776 pref = 1; |
|
|
777 } |
|
3565
|
778 else if (val == "never" || val == "no" || val == "false") |
|
2285
|
779 { |
|
|
780 warn_old_style_preference (false, val); |
|
|
781 pref = 0; |
|
|
782 } |
|
2204
|
783 } |
|
|
784 |
|
|
785 return pref; |
|
|
786 } |
|
|
787 |
|
3354
|
788 static void |
|
5275
|
789 check_dimensions (octave_idx_type& nr, octave_idx_type& nc, const char *warnfor) |
|
3354
|
790 { |
|
|
791 if (nr < 0 || nc < 0) |
|
|
792 { |
|
5781
|
793 warning_with_id ("Octave:neg-dim-as-zero", |
|
|
794 "%s: converting negative dimension to zero", warnfor); |
|
3354
|
795 |
|
4457
|
796 nr = (nr < 0) ? 0 : nr; |
|
|
797 nc = (nc < 0) ? 0 : nc; |
|
3354
|
798 } |
|
|
799 } |
|
|
800 |
|
|
801 void |
|
4513
|
802 check_dimensions (dim_vector& dim, const char *warnfor) |
|
4481
|
803 { |
|
|
804 bool neg = false; |
|
|
805 |
|
|
806 for (int i = 0; i < dim.length (); i++) |
|
|
807 { |
|
|
808 if (dim(i) < 0) |
|
|
809 { |
|
|
810 dim(i) = 0; |
|
|
811 neg = true; |
|
|
812 } |
|
|
813 } |
|
|
814 |
|
5781
|
815 if (neg) |
|
|
816 warning_with_id ("Octave:neg-dim-as-zero", |
|
|
817 "%s: converting negative dimension to zero", warnfor); |
|
4481
|
818 } |
|
|
819 |
|
|
820 |
|
|
821 void |
|
|
822 get_dimensions (const octave_value& a, const char *warn_for, |
|
4513
|
823 dim_vector& dim) |
|
4481
|
824 { |
|
|
825 if (a.is_scalar_type ()) |
|
|
826 { |
|
|
827 dim.resize (2); |
|
4732
|
828 dim(0) = a.int_value (); |
|
4481
|
829 dim(1) = dim(0); |
|
|
830 } |
|
|
831 else |
|
|
832 { |
|
5275
|
833 octave_idx_type nr = a.rows (); |
|
|
834 octave_idx_type nc = a.columns (); |
|
4481
|
835 |
|
|
836 if (nr == 1 || nc == 1) |
|
|
837 { |
|
|
838 Array<double> v = a.vector_value (); |
|
|
839 |
|
|
840 if (error_state) |
|
|
841 return; |
|
|
842 |
|
5275
|
843 octave_idx_type n = v.length (); |
|
4481
|
844 dim.resize (n); |
|
5275
|
845 for (octave_idx_type i = 0; i < n; i++) |
|
4783
|
846 dim(i) = static_cast<int> (fix (v(i))); |
|
4481
|
847 } |
|
|
848 else |
|
5257
|
849 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
4481
|
850 } |
|
|
851 |
|
5258
|
852 if (! error_state) |
|
|
853 check_dimensions (dim, warn_for); // May set error_state. |
|
4481
|
854 } |
|
|
855 |
|
|
856 |
|
|
857 void |
|
3354
|
858 get_dimensions (const octave_value& a, const char *warn_for, |
|
5275
|
859 octave_idx_type& nr, octave_idx_type& nc) |
|
3354
|
860 { |
|
|
861 if (a.is_scalar_type ()) |
|
|
862 { |
|
4732
|
863 nr = nc = a.int_value (); |
|
3354
|
864 } |
|
|
865 else |
|
|
866 { |
|
|
867 nr = a.rows (); |
|
|
868 nc = a.columns (); |
|
|
869 |
|
|
870 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
871 { |
|
3419
|
872 Array<double> v = a.vector_value (); |
|
3354
|
873 |
|
|
874 if (error_state) |
|
|
875 return; |
|
|
876 |
|
5275
|
877 nr = static_cast<octave_idx_type> (fix (v (0))); |
|
|
878 nc = static_cast<octave_idx_type> (fix (v (1))); |
|
3354
|
879 } |
|
|
880 else |
|
5257
|
881 error ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
3354
|
882 } |
|
|
883 |
|
5258
|
884 if (! error_state) |
|
|
885 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
3354
|
886 } |
|
|
887 |
|
|
888 void |
|
|
889 get_dimensions (const octave_value& a, const octave_value& b, |
|
5275
|
890 const char *warn_for, octave_idx_type& nr, octave_idx_type& nc) |
|
3354
|
891 { |
|
4732
|
892 nr = a.is_empty () ? 0 : a.int_value (); |
|
|
893 nc = b.is_empty () ? 0 : b.int_value (); |
|
3354
|
894 |
|
|
895 if (error_state) |
|
|
896 error ("%s: expecting two scalar arguments", warn_for); |
|
|
897 else |
|
|
898 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
899 } |
|
|
900 |
|
4478
|
901 Matrix |
|
5275
|
902 identity_matrix (octave_idx_type nr, octave_idx_type nc) |
|
4478
|
903 { |
|
|
904 Matrix m (nr, nc, 0.0); |
|
|
905 |
|
|
906 if (nr > 0 && nc > 0) |
|
|
907 { |
|
5275
|
908 octave_idx_type n = std::min (nr, nc); |
|
4478
|
909 |
|
5275
|
910 for (octave_idx_type i = 0; i < n; i++) |
|
4478
|
911 m (i, i) = 1.0; |
|
|
912 } |
|
|
913 |
|
|
914 return m; |
|
|
915 } |
|
|
916 |
|
3620
|
917 extern int |
|
3622
|
918 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
919 { |
|
|
920 int retval = -1; |
|
|
921 |
|
|
922 va_list args; |
|
|
923 va_start (args, fmt); |
|
|
924 |
|
|
925 retval = octave_vformat (os, fmt, args); |
|
|
926 |
|
|
927 va_end (args); |
|
|
928 |
|
|
929 return retval; |
|
|
930 } |
|
|
931 |
|
|
932 extern int |
|
3622
|
933 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
934 { |
|
|
935 int retval = -1; |
|
|
936 |
|
3775
|
937 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
|
3620
|
938 |
|
4135
|
939 std::streambuf *sb = os.rdbuf (); |
|
|
940 |
|
|
941 if (sb) |
|
4302
|
942 { |
|
|
943 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
944 |
|
|
945 retval = sb->vform (fmt, args); |
|
|
946 |
|
|
947 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
948 } |
|
3620
|
949 |
|
|
950 #else |
|
|
951 |
|
|
952 char *s = octave_vsnprintf (fmt, args); |
|
|
953 |
|
|
954 if (s) |
|
|
955 { |
|
|
956 os << s; |
|
|
957 |
|
|
958 retval = strlen (s); |
|
|
959 } |
|
|
960 |
|
|
961 #endif |
|
|
962 |
|
|
963 return retval; |
|
|
964 } |
|
|
965 |
|
5775
|
966 /* FIXME -- we really need a configure test for this. */ |
|
4302
|
967 |
|
|
968 #if defined __GNUC__ && __GNUC__ >= 3 |
|
|
969 #define HAVE_C99_VSNPRINTF 1 |
|
|
970 #endif |
|
|
971 |
|
|
972 // We manage storage. User should not free it, and its contents are |
|
|
973 // only valid until next call to vsnprintf. |
|
|
974 |
|
|
975 // Interrupts might happen if someone makes a call with something that |
|
|
976 // will require a very large buffer. If we are interrupted in that |
|
|
977 // case, we should make the buffer size smaller for the next call. |
|
|
978 |
|
|
979 #define BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF \ |
|
|
980 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_1; \ |
|
|
981 delete [] buf; \ |
|
|
982 buf = 0; \ |
|
|
983 size = initial_size; \ |
|
|
984 octave_throw_interrupt_exception (); \ |
|
|
985 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_2 |
|
|
986 |
|
4485
|
987 #if defined __GNUC__ && defined __va_copy |
|
|
988 #define SAVE_ARGS(saved_args, args) __va_copy (saved_args, args) |
|
|
989 #elif defined va_copy |
|
|
990 #define SAVE_ARGS(saved_args, args) va_copy (saved_args, args) |
|
|
991 #else |
|
|
992 #define SAVE_ARGS(saved_args, args) saved_args = args |
|
|
993 #endif |
|
|
994 |
|
4302
|
995 char * |
|
|
996 octave_vsnprintf (const char *fmt, va_list args) |
|
|
997 { |
|
|
998 static const size_t initial_size = 100; |
|
|
999 |
|
|
1000 static size_t size = initial_size; |
|
|
1001 |
|
|
1002 static char *buf = 0; |
|
|
1003 |
|
4482
|
1004 #if defined (HAVE_C99_VSNPRINTF) |
|
|
1005 size_t nchars; |
|
|
1006 #else |
|
4351
|
1007 int nchars; |
|
4482
|
1008 #endif |
|
4302
|
1009 |
|
|
1010 if (! buf) |
|
|
1011 buf = new char [size]; |
|
|
1012 |
|
|
1013 if (! buf) |
|
|
1014 return 0; |
|
|
1015 |
|
|
1016 #if defined (HAVE_C99_VSNPRINTF) |
|
|
1017 |
|
4485
|
1018 // Note that the caller is responsible for calling va_end on args. |
|
|
1019 // We will do it for saved_args. |
|
|
1020 |
|
|
1021 va_list saved_args; |
|
|
1022 |
|
|
1023 SAVE_ARGS (saved_args, args); |
|
|
1024 |
|
4302
|
1025 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1026 |
|
|
1027 nchars = octave_raw_vsnprintf (buf, size, fmt, args); |
|
|
1028 |
|
|
1029 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1030 |
|
|
1031 if (nchars >= size) |
|
|
1032 { |
|
|
1033 size = nchars + 1; |
|
|
1034 |
|
|
1035 delete [] buf; |
|
|
1036 |
|
|
1037 buf = new char [size]; |
|
|
1038 |
|
|
1039 if (buf) |
|
|
1040 { |
|
|
1041 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1042 |
|
4485
|
1043 octave_raw_vsnprintf (buf, size, fmt, saved_args); |
|
4302
|
1044 |
|
|
1045 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1046 } |
|
|
1047 } |
|
|
1048 |
|
4485
|
1049 va_end (saved_args); |
|
|
1050 |
|
4302
|
1051 #else |
|
|
1052 |
|
|
1053 while (1) |
|
|
1054 { |
|
4485
|
1055 va_list saved_args; |
|
|
1056 |
|
|
1057 SAVE_ARGS (saved_args, args); |
|
|
1058 |
|
4302
|
1059 BEGIN_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE_FOR_VSNPRINTF; |
|
|
1060 |
|
4485
|
1061 nchars = octave_raw_vsnprintf (buf, size, fmt, saved_args); |
|
|
1062 |
|
|
1063 va_end (saved_args); |
|
4302
|
1064 |
|
|
1065 END_INTERRUPT_IMMEDIATELY_IN_FOREIGN_CODE; |
|
|
1066 |
|
4351
|
1067 if (nchars > -1 && nchars < size-1) |
|
4302
|
1068 return buf; |
|
|
1069 else |
|
|
1070 { |
|
|
1071 delete [] buf; |
|
|
1072 |
|
|
1073 size *= 2; |
|
|
1074 |
|
|
1075 buf = new char [size]; |
|
|
1076 |
|
|
1077 if (! buf) |
|
|
1078 return 0; |
|
|
1079 } |
|
|
1080 } |
|
|
1081 |
|
|
1082 #endif |
|
|
1083 |
|
|
1084 return buf; |
|
|
1085 } |
|
|
1086 |
|
|
1087 char * |
|
|
1088 octave_snprintf (const char *fmt, ...) |
|
|
1089 { |
|
|
1090 char *retval = 0; |
|
|
1091 |
|
|
1092 va_list args; |
|
|
1093 va_start (args, fmt); |
|
|
1094 |
|
|
1095 retval = octave_vsnprintf (fmt, args); |
|
|
1096 |
|
|
1097 va_end (args); |
|
|
1098 |
|
|
1099 return retval; |
|
|
1100 } |
|
|
1101 |
|
4086
|
1102 void |
|
|
1103 octave_sleep (double seconds) |
|
|
1104 { |
|
|
1105 if (seconds > 0) |
|
|
1106 { |
|
|
1107 double t; |
|
|
1108 |
|
4093
|
1109 unsigned int usec |
|
4783
|
1110 = static_cast<unsigned int> (modf (seconds, &t) * 1000000); |
|
4086
|
1111 |
|
4093
|
1112 unsigned int sec |
|
4783
|
1113 = (t > UINT_MAX) ? UINT_MAX : static_cast<unsigned int> (t); |
|
4086
|
1114 |
|
5770
|
1115 // Versions of these functions that accept unsigned int args are |
|
|
1116 // defined in cutils.c. |
|
4086
|
1117 octave_sleep (sec); |
|
|
1118 octave_usleep (usec); |
|
|
1119 } |
|
|
1120 } |
|
|
1121 |
|
572
|
1122 /* |
|
1
|
1123 ;;; Local Variables: *** |
|
|
1124 ;;; mode: C++ *** |
|
|
1125 ;;; End: *** |
|
|
1126 */ |
