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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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1315
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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1
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20 |
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21 */ |
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22 |
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240
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23 #ifdef HAVE_CONFIG_H |
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1192
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24 #include <config.h> |
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1
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25 #endif |
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26 |
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3716
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27 #include <cerrno> |
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1343
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28 #include <climits> |
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1346
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29 #include <cstring> |
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1343
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30 |
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3503
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31 #include <fstream> |
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32 #include <iostream> |
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1728
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33 #include <string> |
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34 |
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1350
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35 #ifdef HAVE_UNISTD_H |
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2442
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36 #ifdef HAVE_SYS_TYPES_H |
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1
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37 #include <sys/types.h> |
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2442
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38 #endif |
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1
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39 #include <unistd.h> |
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40 #endif |
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367
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41 |
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3566
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42 // Include setjmp.h, not csetjmp since the latter might only define |
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43 // the ANSI standard C interface. |
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44 |
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45 #include <setjmp.h> |
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46 |
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3040
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47 #include "dir-ops.h" |
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48 #include "file-ops.h" |
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2926
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49 #include "file-stat.h" |
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4051
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50 #include "lo-sstream.h" |
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1651
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51 #include "oct-cmplx.h" |
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2926
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52 #include "oct-env.h" |
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3040
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53 #include "pathsearch.h" |
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1755
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54 #include "str-vec.h" |
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1651
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55 |
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4216
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56 #include "Cell.h" |
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2492
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57 #include <defaults.h> |
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1352
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58 #include "defun.h" |
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59 #include "dirfns.h" |
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60 #include "error.h" |
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61 #include "gripes.h" |
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62 #include "input.h" |
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1742
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63 #include "oct-hist.h" |
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1750
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64 #include "oct-obj.h" |
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1352
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65 #include "pager.h" |
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1690
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66 #include "sysdep.h" |
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1750
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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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3354
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72 // Should expressions like ones (-1, 5) result in an empty matrix or |
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73 // an error? A positive value means yes. A negative value means |
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74 // yes, but print a warning message. Zero means it should be |
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75 // considered an error. |
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76 static int Vtreat_neg_dim_as_zero; |
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77 |
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4143
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78 // Return TRUE if S is a valid identifier. |
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79 |
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80 bool |
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81 valid_identifier (const char *s) |
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82 { |
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4264
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83 if (! s || ! (isalpha (*s) || *s == '_')) |
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4143
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84 return false; |
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85 |
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86 while (*++s != '\0') |
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87 if (! (isalnum (*s) || *s == '_')) |
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88 return false; |
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89 |
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90 return true; |
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91 } |
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92 |
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93 bool |
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94 valid_identifier (const std::string& s) |
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95 { |
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96 return valid_identifier (s.c_str ()); |
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97 } |
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98 |
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4264
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99 DEFCMD (isvarname, args, , |
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100 "@deftypefn {Built-in Function} {} isvarname (@var{name})\n\ |
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101 Return true if @var{name} is a valid variable name\n\ |
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102 @end deftypefn") |
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103 { |
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104 octave_value retval; |
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105 |
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106 int argc = args.length () + 1; |
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107 |
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108 string_vector argv = args.make_argv ("help"); |
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109 |
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110 if (error_state) |
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111 return retval; |
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112 |
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113 if (argc == 2) |
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114 retval = valid_identifier (argv[1]); |
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115 else |
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116 print_usage ("isvarname"); |
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117 |
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118 return retval; |
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119 } |
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120 |
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1
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121 int |
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3523
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122 almost_match (const std::string& std, const std::string& s, int min_match_len, |
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526
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123 int case_sens) |
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1
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124 { |
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1755
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125 int stdlen = std.length (); |
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126 int slen = s.length (); |
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1
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127 |
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128 return (slen <= stdlen |
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129 && slen >= min_match_len |
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287
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130 && (case_sens |
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1755
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131 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
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132 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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133 } |
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134 |
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581
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135 // Ugh. |
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136 |
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287
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137 int |
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3523
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138 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
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287
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139 int min_toks_to_match, int max_toks) |
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140 { |
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141 int status = 0; |
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142 int tok_count = 0; |
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143 int toks_matched = 0; |
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144 |
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1755
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145 if (s.empty () || max_toks < 1) |
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287
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146 return status; |
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147 |
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1755
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148 char *kw = strsave (s.c_str ()); |
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287
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149 |
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150 char *t = kw; |
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151 while (*t != '\0') |
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152 { |
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153 if (*t == '\t') |
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154 *t = ' '; |
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155 t++; |
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156 } |
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157 |
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158 char *beg = kw; |
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159 while (*beg == ' ') |
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160 beg++; |
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161 |
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162 if (*beg == '\0') |
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163 return status; |
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164 |
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165 |
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3072
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166 const char **to_match = new const char * [max_toks + 1]; |
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167 const char * const *s1 = std; |
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168 const char **s2 = to_match; |
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287
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169 |
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526
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170 if (! s1 || ! s2) |
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287
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171 goto done; |
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172 |
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173 s2[tok_count] = beg; |
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174 char *end; |
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526
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175 while ((end = strchr (beg, ' ')) != 0) |
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287
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176 { |
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177 *end = '\0'; |
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178 beg = end + 1; |
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179 |
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180 while (*beg == ' ') |
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181 beg++; |
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182 |
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183 if (*beg == '\0') |
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184 break; |
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185 |
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186 tok_count++; |
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187 if (tok_count >= max_toks) |
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188 goto done; |
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189 |
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190 s2[tok_count] = beg; |
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191 } |
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526
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192 s2[tok_count+1] = 0; |
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287
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193 |
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194 s2 = to_match; |
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195 |
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196 for (;;) |
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197 { |
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198 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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199 goto done; |
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200 |
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201 toks_matched++; |
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202 |
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203 s1++; |
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204 s2++; |
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205 |
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206 if (! *s2) |
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207 { |
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208 status = (toks_matched >= min_toks_to_match); |
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209 goto done; |
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210 } |
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211 |
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212 if (! *s1) |
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213 goto done; |
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214 } |
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215 |
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216 done: |
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217 |
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218 delete [] kw; |
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219 delete [] to_match; |
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220 |
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221 return status; |
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1
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222 } |
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223 |
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2234
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224 // Return non-zero if either NR or NC is zero. Return -1 if this |
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225 // should be considered fatal; return 1 if this is ok. |
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226 |
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227 int |
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228 empty_arg (const char *name, int nr, int nc) |
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229 { |
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230 int is_empty = 0; |
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231 |
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232 if (nr == 0 || nc == 0) |
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233 { |
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234 int flag = Vpropagate_empty_matrices; |
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235 |
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236 if (flag < 0) |
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237 { |
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238 gripe_empty_arg (name, 0); |
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239 is_empty = 1; |
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240 } |
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241 else if (flag == 0) |
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242 { |
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243 gripe_empty_arg (name, 1); |
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244 is_empty = -1; |
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245 } |
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246 else |
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247 is_empty = 1; |
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248 } |
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249 |
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250 return is_empty; |
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251 } |
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252 |
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581
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253 // See if the given file is in the path. |
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254 |
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3536
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255 std::string |
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4243
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256 search_path_for_file (const std::string& path, const string_vector& names) |
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686
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257 { |
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3174
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258 dir_path p (path); |
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686
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259 |
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4243
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260 return octave_env::make_absolute (p.find_first_of (names), |
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261 octave_env::getcwd ()); |
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686
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262 } |
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263 |
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4216
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264 // Find all locations of the given file in the path. |
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265 |
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266 string_vector |
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4243
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267 search_path_for_all_files (const std::string& path, const string_vector& names) |
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4216
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268 { |
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269 dir_path p (path); |
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270 |
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4243
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271 string_vector sv = p.find_all_first_of (names); |
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4216
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272 |
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273 int len = sv.length (); |
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274 |
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275 for (int i = 0; i < len; i++) |
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276 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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277 |
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278 return sv; |
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279 } |
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280 |
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281 static string_vector |
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282 make_absolute (const string_vector& sv) |
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283 { |
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284 int len = sv.length (); |
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285 |
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286 for (int i = 0; i < len; i++) |
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287 sv[i] = octave_env::make_absolute (sv[i], octave_env::getcwd ()); |
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288 |
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289 return sv; |
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290 } |
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291 |
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3195
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292 DEFUN (file_in_loadpath, args, , |
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3446
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293 "-*- texinfo -*-\n\ |
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4216
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294 @deftypefn {Built-in Function} {} file_in_loadpath (@var{file})\n\ |
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295 @deftypefnx {Built-in Function} {} file_in_loadpath (@var{file}, \"all\")\n\ |
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3195
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296 \n\ |
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4216
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297 Return the absolute name name of @var{file} if it can be found in\n\ |
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298 the list of directories specified by @code{LOADPATH}.\n\ |
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299 If no file is found, return an empty matrix.\n\ |
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300 \n\ |
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4243
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301 If the first argument is a cell array of of strings, search each\n\ |
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302 directory of the loadpath for element of the cell array and return\n\ |
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303 the first that matches.\n\ |
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304 \n\ |
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4216
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305 If the second optional argument @code{\"all\"} is supplied, return\n\ |
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306 a cell array containing the list of all files that have the same\n\ |
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307 name in the path. If no files are found, return an empty cell array.\n\ |
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3446
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308 @end deftypefn\n\ |
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309 @seealso{file_in_path}") |
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3195
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310 { |
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4216
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311 octave_value retval; |
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3195
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312 |
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4243
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313 int nargin = args.length (); |
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3195
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314 |
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4243
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315 if (nargin == 1 || nargin == 2) |
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4216
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316 { |
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4243
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317 string_vector names = args(0).all_strings (); |
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318 |
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319 if (! error_state && names.length () > 0) |
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320 { |
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321 if (nargin == 1) |
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322 { |
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323 std::string fname = octave_env::make_absolute |
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324 (Vload_path_dir_path.find_first_of (names), |
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325 octave_env::getcwd ()); |
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326 |
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327 if (fname.empty ()) |
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328 retval = Matrix (); |
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329 else |
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330 retval = fname; |
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331 } |
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332 else if (nargin == 2) |
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333 { |
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334 std::string opt = args(1).string_value (); |
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335 |
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336 if (! error_state && opt == "all") |
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337 retval = Cell (make_absolute (Vload_path_dir_path.find_all_first_of (names))); |
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338 else |
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4249
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339 error ("file_in_loadpath: invalid option"); |
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4243
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340 } |
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341 } |
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4216
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342 else |
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4243
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343 error ("file_in_loadpath: expecting string as first argument"); |
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4216
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344 } |
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3195
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345 else |
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346 print_usage ("file_in_loadpath"); |
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347 |
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348 return retval; |
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349 } |
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350 |
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1957
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351 DEFUN (file_in_path, args, , |
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3301
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352 "-*- texinfo -*-\n\ |
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353 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
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4216
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354 @deftypefnx {Built-in Function} {} file_in_path (@var{path}, @var{file}, \"all\")\n\ |
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3301
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355 Return the absolute name name of @var{file} if it can be found in\n\ |
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356 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
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357 directories in the format described for the built-in variable\n\ |
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4216
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358 @code{LOADPATH}. If no file is found, return an empty matrix.\n\ |
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3301
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359 For example,\n\ |
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360 \n\ |
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361 @example\n\ |
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362 file_in_path (LOADPATH, \"nargchk.m\")\n\ |
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363 @result{} \"@value{OCTAVEHOME}/share/octave/2.0/m/general/nargchk.m\"\n\ |
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364 @end example\n\ |
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4216
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365 \n\ |
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4243
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366 If the second argument is a cell array of of strings, search each\n\ |
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367 directory of the path for element of the cell array and return\n\ |
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368 the first that matches.\n\ |
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369 \n\ |
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4216
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370 If the third optional argument @code{\"all\"} is supplied, return\n\ |
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371 a cell array containing the list of all files that have the same\n\ |
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372 name in the path. If no files are found, return an empty cell array.\n\ |
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4249
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373 @seealso{file_in_loadpath}\n\ |
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3301
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374 @end deftypefn") |
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686
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375 { |
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4216
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376 octave_value retval; |
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686
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377 |
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4243
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378 int nargin = args.length (); |
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1755
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379 |
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4243
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380 if (nargin == 2 || nargin == 3) |
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686
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381 { |
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4243
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382 std::string path = args(0).string_value (); |
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383 |
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384 if (! error_state) |
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385 { |
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4249
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386 string_vector names = args(1).all_strings (); |
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4243
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387 |
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388 if (! error_state && names.length () > 0) |
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389 { |
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390 if (nargin == 2) |
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391 { |
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392 std::string fname = search_path_for_file (path, names); |
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686
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393 |
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4243
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394 if (fname.empty ()) |
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395 retval = Matrix (); |
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396 else |
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397 retval = fname; |
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398 } |
|
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399 else if (nargin == 3) |
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400 { |
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4249
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401 std::string opt = args(2).string_value (); |
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4243
|
402 |
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403 if (! error_state && opt == "all") |
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404 retval = Cell (make_absolute (search_path_for_all_files (path, names))); |
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405 else |
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4249
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406 error ("file_in_path: invalid option"); |
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4243
|
407 } |
|
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408 } |
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409 else |
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410 error ("file_in_path: expecting string as second argument"); |
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411 } |
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1755
|
412 else |
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4243
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413 error ("file_in_path: expecting string as first argument"); |
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686
|
414 } |
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415 else |
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416 print_usage ("file_in_path"); |
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417 |
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418 return retval; |
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419 } |
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420 |
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3536
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421 std::string |
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3523
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422 file_in_path (const std::string& name, const std::string& suffix) |
|
526
|
423 { |
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3523
|
424 std::string nm = name; |
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526
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425 |
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1755
|
426 if (! suffix.empty ()) |
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427 nm.append (suffix); |
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686
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428 |
|
3174
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429 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
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430 octave_env::getcwd ()); |
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526
|
431 } |
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432 |
|
581
|
433 // See if there is an function file in the path. If so, return the |
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|
434 // full path to the file. |
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|
435 |
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3536
|
436 std::string |
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3523
|
437 fcn_file_in_path (const std::string& name) |
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526
|
438 { |
|
3523
|
439 std::string retval; |
|
908
|
440 |
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1755
|
441 int len = name.length (); |
|
|
442 |
|
|
443 if (len > 0) |
|
|
444 { |
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445 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
|
|
446 retval = file_in_path (name, ""); |
|
908
|
447 else |
|
1755
|
448 retval = file_in_path (name, ".m"); |
|
908
|
449 } |
|
1755
|
450 |
|
|
451 return retval; |
|
526
|
452 } |
|
|
453 |
|
581
|
454 // See if there is an octave file in the path. If so, return the |
|
|
455 // full path to the file. |
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|
456 |
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3536
|
457 std::string |
|
3523
|
458 oct_file_in_path (const std::string& name) |
|
572
|
459 { |
|
3523
|
460 std::string retval; |
|
908
|
461 |
|
1755
|
462 int len = name.length (); |
|
|
463 |
|
|
464 if (len > 0) |
|
|
465 { |
|
|
466 if (len > 2 && name [len - 4] == '.' && name [len - 3] == 'o' |
|
908
|
467 && name [len - 2] == 'c' && name [len - 1] == 't') |
|
1755
|
468 retval = file_in_path (name, ""); |
|
908
|
469 else |
|
1755
|
470 retval = file_in_path (name, ".oct"); |
|
908
|
471 } |
|
1755
|
472 |
|
|
473 return retval; |
|
572
|
474 } |
|
|
475 |
|
3103
|
476 // Replace backslash escapes in a string with the real values. |
|
|
477 |
|
3536
|
478 std::string |
|
3523
|
479 do_string_escapes (const std::string& s) |
|
3103
|
480 { |
|
3523
|
481 std::string retval; |
|
3103
|
482 |
|
|
483 size_t i = 0; |
|
|
484 size_t j = 0; |
|
|
485 size_t len = s.length (); |
|
|
486 |
|
|
487 retval.resize (len); |
|
|
488 |
|
|
489 while (j < len) |
|
|
490 { |
|
|
491 if (s[j] == '\\' && j+1 < len) |
|
|
492 { |
|
|
493 switch (s[++j]) |
|
|
494 { |
|
3893
|
495 case '0': |
|
|
496 retval[i] = '\0'; |
|
|
497 break; |
|
|
498 |
|
3103
|
499 case 'a': |
|
|
500 retval[i] = '\a'; |
|
|
501 break; |
|
|
502 |
|
|
503 case 'b': // backspace |
|
|
504 retval[i] = '\b'; |
|
|
505 break; |
|
|
506 |
|
|
507 case 'f': // formfeed |
|
|
508 retval[i] = '\f'; |
|
|
509 break; |
|
|
510 |
|
|
511 case 'n': // newline |
|
|
512 retval[i] = '\n'; |
|
|
513 break; |
|
|
514 |
|
|
515 case 'r': // carriage return |
|
|
516 retval[i] = '\r'; |
|
|
517 break; |
|
|
518 |
|
|
519 case 't': // horizontal tab |
|
|
520 retval[i] = '\t'; |
|
|
521 break; |
|
|
522 |
|
|
523 case 'v': // vertical tab |
|
|
524 retval[i] = '\v'; |
|
|
525 break; |
|
|
526 |
|
|
527 case '\\': // backslash |
|
|
528 retval[i] = '\\'; |
|
|
529 break; |
|
|
530 |
|
|
531 case '\'': // quote |
|
|
532 retval[i] = '\''; |
|
|
533 break; |
|
|
534 |
|
|
535 case '"': // double quote |
|
|
536 retval[i] = '"'; |
|
|
537 break; |
|
|
538 |
|
|
539 default: |
|
|
540 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
541 converting to `%c'", s[j], s[j]); |
|
|
542 retval[i] = s[j]; |
|
|
543 break; |
|
|
544 } |
|
|
545 } |
|
|
546 else |
|
|
547 { |
|
|
548 retval[i] = s[j]; |
|
|
549 } |
|
|
550 |
|
|
551 i++; |
|
|
552 j++; |
|
|
553 } |
|
|
554 |
|
3105
|
555 retval.resize (i); |
|
3103
|
556 |
|
|
557 return retval; |
|
|
558 } |
|
|
559 |
|
|
560 DEFUN (do_string_escapes, args, , |
|
3446
|
561 "-*- texinfo -*-\n\ |
|
|
562 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
|
|
563 Convert special characters in @var{string} to their escaped forms.\n\ |
|
|
564 @end deftypefn") |
|
3103
|
565 { |
|
|
566 octave_value retval; |
|
|
567 |
|
|
568 int nargin = args.length (); |
|
|
569 |
|
|
570 if (nargin == 1) |
|
|
571 { |
|
|
572 if (args(0).is_string ()) |
|
|
573 retval = do_string_escapes (args(0).string_value ()); |
|
|
574 else |
|
|
575 error ("do_string_escapes: argument must be a string"); |
|
|
576 } |
|
|
577 else |
|
|
578 print_usage ("do_string_escapes"); |
|
|
579 |
|
|
580 return retval; |
|
|
581 } |
|
|
582 |
|
1755
|
583 const char * |
|
801
|
584 undo_string_escape (char c) |
|
|
585 { |
|
|
586 if (! c) |
|
1755
|
587 return ""; |
|
801
|
588 |
|
|
589 switch (c) |
|
|
590 { |
|
3893
|
591 case '\0': |
|
|
592 return "\\0"; |
|
|
593 |
|
801
|
594 case '\a': |
|
|
595 return "\\a"; |
|
|
596 |
|
|
597 case '\b': // backspace |
|
|
598 return "\\b"; |
|
|
599 |
|
|
600 case '\f': // formfeed |
|
|
601 return "\\f"; |
|
|
602 |
|
|
603 case '\n': // newline |
|
|
604 return "\\n"; |
|
|
605 |
|
|
606 case '\r': // carriage return |
|
|
607 return "\\r"; |
|
|
608 |
|
|
609 case '\t': // horizontal tab |
|
|
610 return "\\t"; |
|
|
611 |
|
|
612 case '\v': // vertical tab |
|
|
613 return "\\v"; |
|
|
614 |
|
|
615 case '\\': // backslash |
|
|
616 return "\\\\"; |
|
|
617 |
|
|
618 case '"': // double quote |
|
|
619 return "\\\""; |
|
|
620 |
|
|
621 default: |
|
1755
|
622 { |
|
|
623 static char retval[2]; |
|
|
624 retval[0] = c; |
|
|
625 retval[1] = '\0'; |
|
|
626 return retval; |
|
|
627 } |
|
801
|
628 } |
|
|
629 } |
|
|
630 |
|
3536
|
631 std::string |
|
3523
|
632 undo_string_escapes (const std::string& s) |
|
801
|
633 { |
|
3523
|
634 std::string retval; |
|
801
|
635 |
|
1755
|
636 for (size_t i = 0; i < s.length (); i++) |
|
|
637 retval.append (undo_string_escape (s[i])); |
|
801
|
638 |
|
1755
|
639 return retval; |
|
801
|
640 } |
|
|
641 |
|
1957
|
642 DEFUN (undo_string_escapes, args, , |
|
3361
|
643 "-*- texinfo -*-\n\ |
|
|
644 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
645 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
646 example, the expression\n\ |
|
|
647 \n\ |
|
|
648 @example\n\ |
|
|
649 bell = \"\\a\";\n\ |
|
|
650 @end example\n\ |
|
|
651 \n\ |
|
|
652 @noindent\n\ |
|
|
653 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
654 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
655 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
656 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
657 able to print the original representation of the string, with the\n\ |
|
|
658 special characters replaced by their escape sequences. For example,\n\ |
|
|
659 \n\ |
|
|
660 @example\n\ |
|
|
661 octave:13> undo_string_escapes (bell)\n\ |
|
|
662 ans = \\a\n\ |
|
|
663 @end example\n\ |
|
|
664 \n\ |
|
|
665 @noindent\n\ |
|
|
666 replaces the unprintable alert character with its printable\n\ |
|
|
667 representation.\n\ |
|
|
668 @end deftypefn") |
|
801
|
669 { |
|
2086
|
670 octave_value retval; |
|
801
|
671 |
|
|
672 int nargin = args.length (); |
|
|
673 |
|
3103
|
674 if (nargin == 1) |
|
|
675 { |
|
|
676 if (args(0).is_string ()) |
|
|
677 retval = undo_string_escapes (args(0).string_value ()); |
|
|
678 else |
|
|
679 error ("undo_string_escapes: argument must be a string"); |
|
|
680 } |
|
801
|
681 else |
|
1023
|
682 print_usage ("undo_string_escapes"); |
|
801
|
683 |
|
|
684 return retval; |
|
|
685 } |
|
|
686 |
|
4243
|
687 DEFUN (find_first_of_in_loadpath, args, , "") |
|
|
688 { |
|
|
689 octave_value retval; |
|
|
690 |
|
|
691 if (args.length () == 1) |
|
|
692 { |
|
|
693 string_vector names = args(0).all_strings (); |
|
|
694 |
|
|
695 if (! error_state) |
|
|
696 retval = Vload_path_dir_path.find_all_first_of (names); |
|
|
697 } |
|
|
698 else |
|
|
699 print_usage ("find_first_of_in_loadpath"); |
|
|
700 |
|
|
701 return retval; |
|
|
702 } |
|
|
703 |
|
|
704 |
|
3879
|
705 // #if 0 |
|
3716
|
706 |
|
|
707 // Octave could use some way to access the value of ERRNO, but this is |
|
|
708 // probably not the best interface, so don't depend on it... |
|
|
709 |
|
|
710 DEFUN (ERRNO, args, , |
|
|
711 "-*- texinfo -*-\n\ |
|
|
712 @deftypefn {Built-in Function} {@var{system_error_number}} errno ()\n\ |
|
|
713 Return the current value of the system-dependent variable errno.\n\ |
|
|
714 @end deftypefn") |
|
|
715 { |
|
|
716 octave_value retval; |
|
|
717 |
|
|
718 if (args.length () == 0) |
|
4254
|
719 retval = errno; |
|
3716
|
720 else |
|
|
721 print_usage ("errno"); |
|
|
722 |
|
|
723 return retval; |
|
|
724 } |
|
|
725 |
|
3879
|
726 // #endif |
|
3716
|
727 |
|
2285
|
728 static void |
|
3523
|
729 warn_old_style_preference (bool val, const std::string& sval) |
|
2285
|
730 { |
|
|
731 warning |
|
|
732 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
733 sval.c_str (), (val ? 1 : 0)); |
|
|
734 } |
|
|
735 |
|
2204
|
736 // Check the value of a string variable to see if it it's ok to do |
|
|
737 // something. |
|
|
738 // |
|
|
739 // return of 1 => always ok. |
|
|
740 // return of 0 => never ok. |
|
|
741 // return of -1 => ok, but give me warning (default). |
|
|
742 |
|
|
743 int |
|
3523
|
744 check_preference (const std::string& var) |
|
2204
|
745 { |
|
|
746 int pref = -1; |
|
|
747 |
|
3523
|
748 std::string val = builtin_string_variable (var); |
|
2204
|
749 |
|
|
750 if (val.empty ()) |
|
|
751 { |
|
|
752 double dval = 0; |
|
|
753 if (builtin_real_scalar_variable (var, dval)) |
|
|
754 pref = NINT (dval); |
|
|
755 } |
|
|
756 else |
|
|
757 { |
|
3565
|
758 if (val == "yes" || val == "true") |
|
2285
|
759 { |
|
|
760 warn_old_style_preference (true, val); |
|
|
761 pref = 1; |
|
|
762 } |
|
3565
|
763 else if (val == "never" || val == "no" || val == "false") |
|
2285
|
764 { |
|
|
765 warn_old_style_preference (false, val); |
|
|
766 pref = 0; |
|
|
767 } |
|
2204
|
768 } |
|
|
769 |
|
|
770 return pref; |
|
|
771 } |
|
|
772 |
|
3354
|
773 static void |
|
|
774 check_dimensions (int& nr, int& nc, const char *warnfor) |
|
|
775 { |
|
|
776 if (nr < 0 || nc < 0) |
|
|
777 { |
|
|
778 if (Vtreat_neg_dim_as_zero) |
|
|
779 { |
|
|
780 nr = (nr < 0) ? 0 : nr; |
|
|
781 nc = (nc < 0) ? 0 : nc; |
|
|
782 |
|
|
783 if (Vtreat_neg_dim_as_zero < 0) |
|
|
784 warning ("%s: converting negative dimension to zero", |
|
|
785 warnfor); |
|
|
786 } |
|
|
787 else |
|
|
788 error ("%s: can't create a matrix with negative dimensions", |
|
|
789 warnfor); |
|
|
790 } |
|
|
791 } |
|
|
792 |
|
|
793 void |
|
|
794 get_dimensions (const octave_value& a, const char *warn_for, |
|
|
795 int& nr, int& nc) |
|
|
796 { |
|
|
797 if (a.is_scalar_type ()) |
|
|
798 { |
|
|
799 nr = nc = a.nint_value (); |
|
|
800 } |
|
|
801 else |
|
|
802 { |
|
|
803 nr = a.rows (); |
|
|
804 nc = a.columns (); |
|
|
805 |
|
|
806 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
807 { |
|
3419
|
808 Array<double> v = a.vector_value (); |
|
3354
|
809 |
|
|
810 if (error_state) |
|
|
811 return; |
|
|
812 |
|
|
813 nr = NINT (v (0)); |
|
|
814 nc = NINT (v (1)); |
|
|
815 } |
|
|
816 else |
|
|
817 warning ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
|
818 } |
|
|
819 |
|
|
820 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
821 } |
|
|
822 |
|
|
823 void |
|
|
824 get_dimensions (const octave_value& a, const octave_value& b, |
|
|
825 const char *warn_for, int& nr, int& nc) |
|
|
826 { |
|
|
827 nr = a.is_empty () ? 0 : a.nint_value (); |
|
|
828 nc = b.is_empty () ? 0 : b.nint_value (); |
|
|
829 |
|
|
830 if (error_state) |
|
|
831 error ("%s: expecting two scalar arguments", warn_for); |
|
|
832 else |
|
|
833 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
834 } |
|
|
835 |
|
3620
|
836 extern int |
|
3622
|
837 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
838 { |
|
|
839 int retval = -1; |
|
|
840 |
|
|
841 va_list args; |
|
|
842 va_start (args, fmt); |
|
|
843 |
|
|
844 retval = octave_vformat (os, fmt, args); |
|
|
845 |
|
|
846 va_end (args); |
|
|
847 |
|
|
848 return retval; |
|
|
849 } |
|
|
850 |
|
|
851 extern int |
|
3622
|
852 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
853 { |
|
|
854 int retval = -1; |
|
|
855 |
|
3775
|
856 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
|
3620
|
857 |
|
4135
|
858 std::streambuf *sb = os.rdbuf (); |
|
|
859 |
|
|
860 if (sb) |
|
|
861 retval = sb->vform (fmt, args); |
|
3620
|
862 |
|
|
863 #else |
|
|
864 |
|
|
865 char *s = octave_vsnprintf (fmt, args); |
|
|
866 |
|
|
867 if (s) |
|
|
868 { |
|
|
869 os << s; |
|
|
870 |
|
|
871 retval = strlen (s); |
|
|
872 } |
|
|
873 |
|
|
874 #endif |
|
|
875 |
|
|
876 return retval; |
|
|
877 } |
|
|
878 |
|
4086
|
879 void |
|
|
880 octave_sleep (double seconds) |
|
|
881 { |
|
|
882 if (seconds > 0) |
|
|
883 { |
|
|
884 double t; |
|
|
885 |
|
4093
|
886 unsigned int usec |
|
|
887 = static_cast <unsigned int> (modf (seconds, &t) * 1000000); |
|
4086
|
888 |
|
4093
|
889 unsigned int sec |
|
|
890 = (t > UINT_MAX) ? UINT_MAX : static_cast <unsigned int> (t); |
|
4086
|
891 |
|
|
892 octave_sleep (sec); |
|
|
893 octave_usleep (usec); |
|
|
894 } |
|
|
895 } |
|
|
896 |
|
3354
|
897 static int |
|
|
898 treat_neg_dim_as_zero (void) |
|
|
899 { |
|
|
900 Vtreat_neg_dim_as_zero = check_preference ("treat_neg_dim_as_zero"); |
|
|
901 |
|
|
902 return 0; |
|
|
903 } |
|
|
904 |
|
|
905 void |
|
|
906 symbols_of_utils (void) |
|
|
907 { |
|
4233
|
908 DEFVAR (treat_neg_dim_as_zero, false, treat_neg_dim_as_zero, |
|
3369
|
909 "-*- texinfo -*-\n\ |
|
|
910 @defvr {Built-in Variable} treat_neg_dim_as_zero\n\ |
|
|
911 If the value of @code{treat_neg_dim_as_zero} is nonzero, expressions\n\ |
|
|
912 like\n\ |
|
|
913 \n\ |
|
|
914 @example\n\ |
|
|
915 eye (-1)\n\ |
|
|
916 @end example\n\ |
|
|
917 \n\ |
|
|
918 @noindent\n\ |
|
|
919 produce an empty matrix (i.e., row and column dimensions are zero).\n\ |
|
|
920 Otherwise, an error message is printed and control is returned to the\n\ |
|
|
921 top level. The default value is 0.\n\ |
|
|
922 @end defvr"); |
|
3354
|
923 } |
|
|
924 |
|
572
|
925 /* |
|
1
|
926 ;;; Local Variables: *** |
|
|
927 ;;; mode: C++ *** |
|
|
928 ;;; End: *** |
|
|
929 */ |
