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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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1
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47 #include "SLStack.h" |
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48 |
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3040
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49 #include "dir-ops.h" |
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50 #include "file-ops.h" |
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2926
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51 #include "file-stat.h" |
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4051
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52 #include "lo-sstream.h" |
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1651
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53 #include "oct-cmplx.h" |
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2926
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54 #include "oct-env.h" |
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3040
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55 #include "pathsearch.h" |
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1755
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56 #include "str-vec.h" |
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1651
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57 |
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2492
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58 #include <defaults.h> |
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1352
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59 #include "defun.h" |
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60 #include "dirfns.h" |
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61 #include "error.h" |
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62 #include "gripes.h" |
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63 #include "input.h" |
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1742
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64 #include "oct-hist.h" |
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1750
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65 #include "oct-obj.h" |
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1352
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66 #include "pager.h" |
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1690
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67 #include "sysdep.h" |
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1750
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68 #include "toplev.h" |
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1
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69 #include "unwind-prot.h" |
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1352
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70 #include "utils.h" |
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71 #include "variables.h" |
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1
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72 |
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3354
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73 // Should expressions like ones (-1, 5) result in an empty matrix or |
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74 // an error? A positive value means yes. A negative value means |
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75 // yes, but print a warning message. Zero means it should be |
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76 // considered an error. |
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77 static int Vtreat_neg_dim_as_zero; |
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78 |
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1
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79 // Top level context (?) |
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80 extern jmp_buf toplevel; |
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81 |
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581
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82 // Return to the main command loop in octave.cc. |
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83 |
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3350
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84 void |
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1
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85 jump_to_top_level (void) |
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86 { |
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2985
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87 unwind_protect::run_all (); |
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1
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88 |
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89 longjmp (toplevel, 1); |
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90 } |
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91 |
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92 int |
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3523
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93 almost_match (const std::string& std, const std::string& s, int min_match_len, |
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526
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94 int case_sens) |
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1
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95 { |
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1755
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96 int stdlen = std.length (); |
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97 int slen = s.length (); |
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1
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98 |
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99 return (slen <= stdlen |
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100 && slen >= min_match_len |
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287
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101 && (case_sens |
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1755
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102 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
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103 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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104 } |
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105 |
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581
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106 // Ugh. |
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107 |
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287
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108 int |
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3523
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109 keyword_almost_match (const char * const *std, int *min_len, const std::string& s, |
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287
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110 int min_toks_to_match, int max_toks) |
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111 { |
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112 int status = 0; |
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113 int tok_count = 0; |
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114 int toks_matched = 0; |
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115 |
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1755
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116 if (s.empty () || max_toks < 1) |
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287
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117 return status; |
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118 |
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1755
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119 char *kw = strsave (s.c_str ()); |
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287
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120 |
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121 char *t = kw; |
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122 while (*t != '\0') |
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123 { |
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124 if (*t == '\t') |
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125 *t = ' '; |
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126 t++; |
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127 } |
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128 |
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129 char *beg = kw; |
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130 while (*beg == ' ') |
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131 beg++; |
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132 |
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133 if (*beg == '\0') |
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134 return status; |
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135 |
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136 |
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3072
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137 const char **to_match = new const char * [max_toks + 1]; |
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138 const char * const *s1 = std; |
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139 const char **s2 = to_match; |
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287
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140 |
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526
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141 if (! s1 || ! s2) |
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287
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142 goto done; |
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143 |
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144 s2[tok_count] = beg; |
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145 char *end; |
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526
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146 while ((end = strchr (beg, ' ')) != 0) |
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287
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147 { |
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148 *end = '\0'; |
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149 beg = end + 1; |
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150 |
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151 while (*beg == ' ') |
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152 beg++; |
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153 |
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154 if (*beg == '\0') |
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155 break; |
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156 |
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157 tok_count++; |
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158 if (tok_count >= max_toks) |
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159 goto done; |
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160 |
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161 s2[tok_count] = beg; |
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162 } |
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526
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163 s2[tok_count+1] = 0; |
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287
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164 |
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165 s2 = to_match; |
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166 |
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167 for (;;) |
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168 { |
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169 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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170 goto done; |
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171 |
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172 toks_matched++; |
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173 |
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174 s1++; |
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175 s2++; |
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176 |
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177 if (! *s2) |
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178 { |
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179 status = (toks_matched >= min_toks_to_match); |
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180 goto done; |
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181 } |
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182 |
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183 if (! *s1) |
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184 goto done; |
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185 } |
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186 |
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187 done: |
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188 |
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189 delete [] kw; |
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190 delete [] to_match; |
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191 |
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192 return status; |
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1
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193 } |
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194 |
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2234
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195 // Return non-zero if either NR or NC is zero. Return -1 if this |
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196 // should be considered fatal; return 1 if this is ok. |
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197 |
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198 int |
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199 empty_arg (const char *name, int nr, int nc) |
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200 { |
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201 int is_empty = 0; |
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202 |
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203 if (nr == 0 || nc == 0) |
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204 { |
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205 int flag = Vpropagate_empty_matrices; |
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206 |
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207 if (flag < 0) |
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208 { |
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209 gripe_empty_arg (name, 0); |
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210 is_empty = 1; |
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211 } |
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212 else if (flag == 0) |
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213 { |
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214 gripe_empty_arg (name, 1); |
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215 is_empty = -1; |
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216 } |
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217 else |
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218 is_empty = 1; |
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219 } |
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220 |
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221 return is_empty; |
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222 } |
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223 |
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581
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224 // See if the given file is in the path. |
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225 |
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3536
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226 std::string |
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3523
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227 search_path_for_file (const std::string& path, const std::string& name) |
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686
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228 { |
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3174
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229 dir_path p (path); |
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686
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230 |
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2926
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231 return octave_env::make_absolute (p.find (name), octave_env::getcwd ()); |
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686
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232 } |
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233 |
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3195
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234 DEFUN (file_in_loadpath, args, , |
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3446
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235 "-*- texinfo -*-\n\ |
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236 @deftypefn {Built-in Function} {} file_in_loadpath (@var{name})\n\ |
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3195
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237 \n\ |
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3446
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238 Look up @var{name} in Octave's @code{LOADPATH}.\n\ |
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239 @end deftypefn\n\ |
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240 @seealso{file_in_path}") |
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3195
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241 { |
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242 octave_value_list retval; |
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243 |
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244 int argc = args.length () + 1; |
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245 |
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246 string_vector argv = args.make_argv ("file_in_loadpath"); |
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247 |
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248 if (error_state) |
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249 return retval; |
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250 |
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3225
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251 if (argc == 2) |
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3195
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252 retval = octave_env::make_absolute (Vload_path_dir_path.find (argv[1]), |
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253 octave_env::getcwd ()); |
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254 else |
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255 print_usage ("file_in_loadpath"); |
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256 |
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257 return retval; |
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258 } |
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259 |
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1957
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260 DEFUN (file_in_path, args, , |
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3301
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261 "-*- texinfo -*-\n\ |
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262 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
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263 Return the absolute name name of @var{file} if it can be found in\n\ |
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264 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
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265 directories in the format described for the built-in variable\n\ |
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266 @code{LOADPATH}.\n\ |
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267 \n\ |
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268 If the file cannot be found in the path, an empty matrix is returned.\n\ |
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269 For example,\n\ |
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270 \n\ |
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271 @example\n\ |
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272 file_in_path (LOADPATH, \"nargchk.m\")\n\ |
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273 @result{} \"@value{OCTAVEHOME}/share/octave/2.0/m/general/nargchk.m\"\n\ |
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274 @end example\n\ |
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275 @end deftypefn") |
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686
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276 { |
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2086
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277 octave_value_list retval; |
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686
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278 |
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1755
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279 int argc = args.length () + 1; |
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280 |
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1968
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281 string_vector argv = args.make_argv ("file_in_path"); |
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1755
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282 |
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283 if (error_state) |
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284 return retval; |
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686
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285 |
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286 if (argc == 3) |
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287 { |
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3523
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288 std::string fname = search_path_for_file (argv[1], argv[2]); |
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686
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289 |
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1755
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290 if (fname.empty ()) |
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291 retval = Matrix (); |
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292 else |
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686
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293 retval = fname; |
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294 } |
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295 else |
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296 print_usage ("file_in_path"); |
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297 |
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298 return retval; |
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299 } |
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300 |
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3536
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301 std::string |
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3523
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302 file_in_path (const std::string& name, const std::string& suffix) |
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526
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303 { |
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3523
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304 std::string nm = name; |
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526
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305 |
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1755
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306 if (! suffix.empty ()) |
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307 nm.append (suffix); |
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686
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308 |
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3174
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309 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
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310 octave_env::getcwd ()); |
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526
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311 } |
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312 |
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581
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313 // See if there is an function file in the path. If so, return the |
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314 // full path to the file. |
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315 |
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3536
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316 std::string |
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3523
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317 fcn_file_in_path (const std::string& name) |
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526
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318 { |
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3523
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319 std::string retval; |
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908
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320 |
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1755
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321 int len = name.length (); |
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322 |
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323 if (len > 0) |
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324 { |
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325 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
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326 retval = file_in_path (name, ""); |
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908
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327 else |
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1755
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328 retval = file_in_path (name, ".m"); |
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908
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329 } |
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1755
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330 |
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331 return retval; |
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526
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332 } |
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333 |
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581
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334 // See if there is an octave file in the path. If so, return the |
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335 // full path to the file. |
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336 |
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3536
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337 std::string |
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3523
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338 oct_file_in_path (const std::string& name) |
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572
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339 { |
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3523
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340 std::string retval; |
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908
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341 |
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1755
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342 int len = name.length (); |
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343 |
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344 if (len > 0) |
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345 { |
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346 if (len > 2 && name [len - 4] == '.' && name [len - 3] == 'o' |
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908
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347 && name [len - 2] == 'c' && name [len - 1] == 't') |
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1755
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348 retval = file_in_path (name, ""); |
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908
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349 else |
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1755
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350 retval = file_in_path (name, ".oct"); |
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908
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351 } |
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1755
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352 |
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353 return retval; |
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572
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354 } |
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355 |
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3103
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356 // Replace backslash escapes in a string with the real values. |
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357 |
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3536
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358 std::string |
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3523
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359 do_string_escapes (const std::string& s) |
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3103
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360 { |
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3523
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361 std::string retval; |
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3103
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362 |
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363 size_t i = 0; |
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364 size_t j = 0; |
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365 size_t len = s.length (); |
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366 |
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367 retval.resize (len); |
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368 |
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369 while (j < len) |
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370 { |
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371 if (s[j] == '\\' && j+1 < len) |
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372 { |
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373 switch (s[++j]) |
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374 { |
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3893
|
375 case '0': |
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376 retval[i] = '\0'; |
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377 break; |
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378 |
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3103
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379 case 'a': |
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380 retval[i] = '\a'; |
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381 break; |
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382 |
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383 case 'b': // backspace |
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384 retval[i] = '\b'; |
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385 break; |
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386 |
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387 case 'f': // formfeed |
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388 retval[i] = '\f'; |
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389 break; |
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390 |
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391 case 'n': // newline |
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392 retval[i] = '\n'; |
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393 break; |
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394 |
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395 case 'r': // carriage return |
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396 retval[i] = '\r'; |
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397 break; |
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398 |
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399 case 't': // horizontal tab |
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400 retval[i] = '\t'; |
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401 break; |
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402 |
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403 case 'v': // vertical tab |
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404 retval[i] = '\v'; |
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405 break; |
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406 |
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407 case '\\': // backslash |
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408 retval[i] = '\\'; |
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409 break; |
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410 |
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411 case '\'': // quote |
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412 retval[i] = '\''; |
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413 break; |
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414 |
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415 case '"': // double quote |
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416 retval[i] = '"'; |
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417 break; |
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418 |
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419 default: |
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|
420 warning ("unrecognized escape sequence `\\%c' --\ |
|
|
421 converting to `%c'", s[j], s[j]); |
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422 retval[i] = s[j]; |
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423 break; |
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424 } |
|
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425 } |
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426 else |
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427 { |
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428 retval[i] = s[j]; |
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429 } |
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430 |
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431 i++; |
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432 j++; |
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433 } |
|
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434 |
|
3105
|
435 retval.resize (i); |
|
3103
|
436 |
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437 return retval; |
|
|
438 } |
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439 |
|
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440 DEFUN (do_string_escapes, args, , |
|
3446
|
441 "-*- texinfo -*-\n\ |
|
|
442 @deftypefn {Built-in Function} {} do_string_escapes (@var{string})\n\ |
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|
443 Convert special characters in @var{string} to their escaped forms.\n\ |
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|
444 @end deftypefn") |
|
3103
|
445 { |
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446 octave_value retval; |
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447 |
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448 int nargin = args.length (); |
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449 |
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450 if (nargin == 1) |
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|
451 { |
|
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452 if (args(0).is_string ()) |
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453 retval = do_string_escapes (args(0).string_value ()); |
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454 else |
|
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455 error ("do_string_escapes: argument must be a string"); |
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|
456 } |
|
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457 else |
|
|
458 print_usage ("do_string_escapes"); |
|
|
459 |
|
|
460 return retval; |
|
|
461 } |
|
|
462 |
|
1755
|
463 const char * |
|
801
|
464 undo_string_escape (char c) |
|
|
465 { |
|
|
466 if (! c) |
|
1755
|
467 return ""; |
|
801
|
468 |
|
|
469 switch (c) |
|
|
470 { |
|
3893
|
471 case '\0': |
|
|
472 return "\\0"; |
|
|
473 |
|
801
|
474 case '\a': |
|
|
475 return "\\a"; |
|
|
476 |
|
|
477 case '\b': // backspace |
|
|
478 return "\\b"; |
|
|
479 |
|
|
480 case '\f': // formfeed |
|
|
481 return "\\f"; |
|
|
482 |
|
|
483 case '\n': // newline |
|
|
484 return "\\n"; |
|
|
485 |
|
|
486 case '\r': // carriage return |
|
|
487 return "\\r"; |
|
|
488 |
|
|
489 case '\t': // horizontal tab |
|
|
490 return "\\t"; |
|
|
491 |
|
|
492 case '\v': // vertical tab |
|
|
493 return "\\v"; |
|
|
494 |
|
|
495 case '\\': // backslash |
|
|
496 return "\\\\"; |
|
|
497 |
|
|
498 case '"': // double quote |
|
|
499 return "\\\""; |
|
|
500 |
|
|
501 default: |
|
1755
|
502 { |
|
|
503 static char retval[2]; |
|
|
504 retval[0] = c; |
|
|
505 retval[1] = '\0'; |
|
|
506 return retval; |
|
|
507 } |
|
801
|
508 } |
|
|
509 } |
|
|
510 |
|
3536
|
511 std::string |
|
3523
|
512 undo_string_escapes (const std::string& s) |
|
801
|
513 { |
|
3523
|
514 std::string retval; |
|
801
|
515 |
|
1755
|
516 for (size_t i = 0; i < s.length (); i++) |
|
|
517 retval.append (undo_string_escape (s[i])); |
|
801
|
518 |
|
1755
|
519 return retval; |
|
801
|
520 } |
|
|
521 |
|
1957
|
522 DEFUN (undo_string_escapes, args, , |
|
3361
|
523 "-*- texinfo -*-\n\ |
|
|
524 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
525 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
526 example, the expression\n\ |
|
|
527 \n\ |
|
|
528 @example\n\ |
|
|
529 bell = \"\\a\";\n\ |
|
|
530 @end example\n\ |
|
|
531 \n\ |
|
|
532 @noindent\n\ |
|
|
533 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
534 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
535 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
536 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
537 able to print the original representation of the string, with the\n\ |
|
|
538 special characters replaced by their escape sequences. For example,\n\ |
|
|
539 \n\ |
|
|
540 @example\n\ |
|
|
541 octave:13> undo_string_escapes (bell)\n\ |
|
|
542 ans = \\a\n\ |
|
|
543 @end example\n\ |
|
|
544 \n\ |
|
|
545 @noindent\n\ |
|
|
546 replaces the unprintable alert character with its printable\n\ |
|
|
547 representation.\n\ |
|
|
548 @end deftypefn") |
|
801
|
549 { |
|
2086
|
550 octave_value retval; |
|
801
|
551 |
|
|
552 int nargin = args.length (); |
|
|
553 |
|
3103
|
554 if (nargin == 1) |
|
|
555 { |
|
|
556 if (args(0).is_string ()) |
|
|
557 retval = undo_string_escapes (args(0).string_value ()); |
|
|
558 else |
|
|
559 error ("undo_string_escapes: argument must be a string"); |
|
|
560 } |
|
801
|
561 else |
|
1023
|
562 print_usage ("undo_string_escapes"); |
|
801
|
563 |
|
|
564 return retval; |
|
|
565 } |
|
|
566 |
|
3879
|
567 // #if 0 |
|
3716
|
568 |
|
|
569 // Octave could use some way to access the value of ERRNO, but this is |
|
|
570 // probably not the best interface, so don't depend on it... |
|
|
571 |
|
|
572 DEFUN (ERRNO, args, , |
|
|
573 "-*- texinfo -*-\n\ |
|
|
574 @deftypefn {Built-in Function} {@var{system_error_number}} errno ()\n\ |
|
|
575 Return the current value of the system-dependent variable errno.\n\ |
|
|
576 @end deftypefn") |
|
|
577 { |
|
|
578 octave_value retval; |
|
|
579 |
|
|
580 if (args.length () == 0) |
|
|
581 retval = static_cast<double> (errno); |
|
|
582 else |
|
|
583 print_usage ("errno"); |
|
|
584 |
|
|
585 return retval; |
|
|
586 } |
|
|
587 |
|
3879
|
588 // #endif |
|
3716
|
589 |
|
2285
|
590 static void |
|
3523
|
591 warn_old_style_preference (bool val, const std::string& sval) |
|
2285
|
592 { |
|
|
593 warning |
|
|
594 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
595 sval.c_str (), (val ? 1 : 0)); |
|
|
596 } |
|
|
597 |
|
2204
|
598 // Check the value of a string variable to see if it it's ok to do |
|
|
599 // something. |
|
|
600 // |
|
|
601 // return of 1 => always ok. |
|
|
602 // return of 0 => never ok. |
|
|
603 // return of -1 => ok, but give me warning (default). |
|
|
604 |
|
|
605 int |
|
3523
|
606 check_preference (const std::string& var) |
|
2204
|
607 { |
|
|
608 int pref = -1; |
|
|
609 |
|
3523
|
610 std::string val = builtin_string_variable (var); |
|
2204
|
611 |
|
|
612 if (val.empty ()) |
|
|
613 { |
|
|
614 double dval = 0; |
|
|
615 if (builtin_real_scalar_variable (var, dval)) |
|
|
616 pref = NINT (dval); |
|
|
617 } |
|
|
618 else |
|
|
619 { |
|
3565
|
620 if (val == "yes" || val == "true") |
|
2285
|
621 { |
|
|
622 warn_old_style_preference (true, val); |
|
|
623 pref = 1; |
|
|
624 } |
|
3565
|
625 else if (val == "never" || val == "no" || val == "false") |
|
2285
|
626 { |
|
|
627 warn_old_style_preference (false, val); |
|
|
628 pref = 0; |
|
|
629 } |
|
2204
|
630 } |
|
|
631 |
|
|
632 return pref; |
|
|
633 } |
|
|
634 |
|
3354
|
635 static void |
|
|
636 check_dimensions (int& nr, int& nc, const char *warnfor) |
|
|
637 { |
|
|
638 if (nr < 0 || nc < 0) |
|
|
639 { |
|
|
640 if (Vtreat_neg_dim_as_zero) |
|
|
641 { |
|
|
642 nr = (nr < 0) ? 0 : nr; |
|
|
643 nc = (nc < 0) ? 0 : nc; |
|
|
644 |
|
|
645 if (Vtreat_neg_dim_as_zero < 0) |
|
|
646 warning ("%s: converting negative dimension to zero", |
|
|
647 warnfor); |
|
|
648 } |
|
|
649 else |
|
|
650 error ("%s: can't create a matrix with negative dimensions", |
|
|
651 warnfor); |
|
|
652 } |
|
|
653 } |
|
|
654 |
|
|
655 void |
|
|
656 get_dimensions (const octave_value& a, const char *warn_for, |
|
|
657 int& nr, int& nc) |
|
|
658 { |
|
|
659 if (a.is_scalar_type ()) |
|
|
660 { |
|
|
661 nr = nc = a.nint_value (); |
|
|
662 } |
|
|
663 else |
|
|
664 { |
|
|
665 nr = a.rows (); |
|
|
666 nc = a.columns (); |
|
|
667 |
|
|
668 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
669 { |
|
3419
|
670 Array<double> v = a.vector_value (); |
|
3354
|
671 |
|
|
672 if (error_state) |
|
|
673 return; |
|
|
674 |
|
|
675 nr = NINT (v (0)); |
|
|
676 nc = NINT (v (1)); |
|
|
677 } |
|
|
678 else |
|
|
679 warning ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
|
680 } |
|
|
681 |
|
|
682 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
683 } |
|
|
684 |
|
|
685 void |
|
|
686 get_dimensions (const octave_value& a, const octave_value& b, |
|
|
687 const char *warn_for, int& nr, int& nc) |
|
|
688 { |
|
|
689 nr = a.is_empty () ? 0 : a.nint_value (); |
|
|
690 nc = b.is_empty () ? 0 : b.nint_value (); |
|
|
691 |
|
|
692 if (error_state) |
|
|
693 error ("%s: expecting two scalar arguments", warn_for); |
|
|
694 else |
|
|
695 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
696 } |
|
|
697 |
|
3620
|
698 extern int |
|
3622
|
699 octave_format (std::ostream& os, const char *fmt, ...) |
|
3620
|
700 { |
|
|
701 int retval = -1; |
|
|
702 |
|
|
703 va_list args; |
|
|
704 va_start (args, fmt); |
|
|
705 |
|
|
706 retval = octave_vformat (os, fmt, args); |
|
|
707 |
|
|
708 va_end (args); |
|
|
709 |
|
|
710 return retval; |
|
|
711 } |
|
|
712 |
|
|
713 extern int |
|
3622
|
714 octave_vformat (std::ostream& os, const char *fmt, va_list args) |
|
3620
|
715 { |
|
|
716 int retval = -1; |
|
|
717 |
|
3775
|
718 #if defined (__GNUG__) && !CXX_ISO_COMPLIANT_LIBRARY |
|
3620
|
719 |
|
4051
|
720 OSSTREAM buf; |
|
3620
|
721 |
|
|
722 buf.vform (fmt, args); |
|
|
723 |
|
4051
|
724 buf << OSSTREAM_ENDS; |
|
3620
|
725 |
|
4051
|
726 std::string s = OSSTREAM_STR (buf); |
|
|
727 |
|
|
728 OSSTREAM_FREEZE (buf); |
|
3620
|
729 |
|
3621
|
730 os << s; |
|
|
731 |
|
4051
|
732 retval = s.length (); |
|
3620
|
733 |
|
|
734 #else |
|
|
735 |
|
|
736 char *s = octave_vsnprintf (fmt, args); |
|
|
737 |
|
|
738 if (s) |
|
|
739 { |
|
|
740 os << s; |
|
|
741 |
|
|
742 retval = strlen (s); |
|
3621
|
743 |
|
|
744 free (s); |
|
3620
|
745 } |
|
|
746 |
|
|
747 #endif |
|
|
748 |
|
|
749 return retval; |
|
|
750 } |
|
|
751 |
|
4086
|
752 void |
|
|
753 octave_sleep (double seconds) |
|
|
754 { |
|
|
755 if (seconds > 0) |
|
|
756 { |
|
|
757 double t; |
|
|
758 |
|
4093
|
759 unsigned int usec |
|
|
760 = static_cast <unsigned int> (modf (seconds, &t) * 1000000); |
|
4086
|
761 |
|
4093
|
762 unsigned int sec |
|
|
763 = (t > UINT_MAX) ? UINT_MAX : static_cast <unsigned int> (t); |
|
4086
|
764 |
|
|
765 octave_sleep (sec); |
|
|
766 octave_usleep (usec); |
|
|
767 } |
|
|
768 } |
|
|
769 |
|
3354
|
770 static int |
|
|
771 treat_neg_dim_as_zero (void) |
|
|
772 { |
|
|
773 Vtreat_neg_dim_as_zero = check_preference ("treat_neg_dim_as_zero"); |
|
|
774 |
|
|
775 return 0; |
|
|
776 } |
|
|
777 |
|
|
778 void |
|
|
779 symbols_of_utils (void) |
|
|
780 { |
|
|
781 DEFVAR (treat_neg_dim_as_zero, 0.0, treat_neg_dim_as_zero, |
|
3369
|
782 "-*- texinfo -*-\n\ |
|
|
783 @defvr {Built-in Variable} treat_neg_dim_as_zero\n\ |
|
|
784 If the value of @code{treat_neg_dim_as_zero} is nonzero, expressions\n\ |
|
|
785 like\n\ |
|
|
786 \n\ |
|
|
787 @example\n\ |
|
|
788 eye (-1)\n\ |
|
|
789 @end example\n\ |
|
|
790 \n\ |
|
|
791 @noindent\n\ |
|
|
792 produce an empty matrix (i.e., row and column dimensions are zero).\n\ |
|
|
793 Otherwise, an error message is printed and control is returned to the\n\ |
|
|
794 top level. The default value is 0.\n\ |
|
|
795 @end defvr"); |
|
3354
|
796 } |
|
|
797 |
|
572
|
798 /* |
|
1
|
799 ;;; Local Variables: *** |
|
|
800 ;;; mode: C++ *** |
|
|
801 ;;; End: *** |
|
|
802 */ |
