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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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1343
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27 #include <climits> |
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1345
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28 #include <csetjmp> |
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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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1728
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31 #include <string> |
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32 |
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1349
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33 #include <fstream.h> |
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34 #include <iostream.h> |
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35 #include <strstream.h> |
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36 |
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1350
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37 #ifdef HAVE_UNISTD_H |
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2442
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38 #ifdef HAVE_SYS_TYPES_H |
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1
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39 #include <sys/types.h> |
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2442
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40 #endif |
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1
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41 #include <unistd.h> |
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42 #endif |
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367
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43 |
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138
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44 #if defined (HAVE_TERMIOS_H) |
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45 #include <termios.h> |
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46 #elif defined (HAVE_TERMIO_H) |
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1
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47 #include <termio.h> |
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138
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48 #elif defined (HAVE_SGTTY_H) |
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1
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49 #include <sgtty.h> |
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50 #else |
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51 LOSE! LOSE! |
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52 #endif |
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53 |
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54 #include "SLStack.h" |
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55 |
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3040
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56 #include "dir-ops.h" |
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57 #include "file-ops.h" |
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2926
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58 #include "file-stat.h" |
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1651
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59 #include "oct-cmplx.h" |
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2926
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60 #include "oct-env.h" |
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3040
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61 #include "pathsearch.h" |
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1755
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62 #include "str-vec.h" |
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1651
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63 |
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2492
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64 #include <defaults.h> |
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1352
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65 #include "defun.h" |
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66 #include "dirfns.h" |
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67 #include "error.h" |
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68 #include "gripes.h" |
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69 #include "input.h" |
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1742
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70 #include "oct-hist.h" |
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1750
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71 #include "oct-obj.h" |
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1352
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72 #include "pager.h" |
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1690
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73 #include "sysdep.h" |
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1750
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74 #include "toplev.h" |
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1
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75 #include "unwind-prot.h" |
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1352
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76 #include "utils.h" |
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77 #include "variables.h" |
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1
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78 |
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3354
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79 // Should expressions like ones (-1, 5) result in an empty matrix or |
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80 // an error? A positive value means yes. A negative value means |
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81 // yes, but print a warning message. Zero means it should be |
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82 // considered an error. |
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83 static int Vtreat_neg_dim_as_zero; |
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84 |
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1
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85 // Top level context (?) |
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86 extern jmp_buf toplevel; |
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87 |
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581
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88 // Return to the main command loop in octave.cc. |
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89 |
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3350
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90 void |
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1
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91 jump_to_top_level (void) |
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92 { |
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2985
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93 unwind_protect::run_all (); |
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1
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94 |
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95 longjmp (toplevel, 1); |
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96 } |
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97 |
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98 int |
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1755
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99 almost_match (const string& std, const string& s, int min_match_len, |
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526
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100 int case_sens) |
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1
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101 { |
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1755
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102 int stdlen = std.length (); |
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103 int slen = s.length (); |
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1
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104 |
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105 return (slen <= stdlen |
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106 && slen >= min_match_len |
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287
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107 && (case_sens |
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1755
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108 ? (strncmp (std.c_str (), s.c_str (), slen) == 0) |
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3350
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109 : (octave_strncasecmp (std.c_str (), s.c_str (), slen) == 0))); |
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287
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110 } |
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111 |
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581
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112 // Ugh. |
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113 |
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287
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114 int |
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3072
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115 keyword_almost_match (const char * const *std, int *min_len, const string& s, |
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287
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116 int min_toks_to_match, int max_toks) |
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117 { |
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118 int status = 0; |
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119 int tok_count = 0; |
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120 int toks_matched = 0; |
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121 |
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1755
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122 if (s.empty () || max_toks < 1) |
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287
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123 return status; |
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124 |
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1755
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125 char *kw = strsave (s.c_str ()); |
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287
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126 |
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127 char *t = kw; |
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128 while (*t != '\0') |
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129 { |
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130 if (*t == '\t') |
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131 *t = ' '; |
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132 t++; |
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133 } |
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134 |
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135 char *beg = kw; |
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136 while (*beg == ' ') |
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137 beg++; |
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138 |
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139 if (*beg == '\0') |
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140 return status; |
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141 |
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142 |
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3072
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143 const char **to_match = new const char * [max_toks + 1]; |
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144 const char * const *s1 = std; |
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145 const char **s2 = to_match; |
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287
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146 |
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526
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147 if (! s1 || ! s2) |
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287
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148 goto done; |
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149 |
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150 s2[tok_count] = beg; |
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151 char *end; |
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526
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152 while ((end = strchr (beg, ' ')) != 0) |
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287
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153 { |
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154 *end = '\0'; |
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155 beg = end + 1; |
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156 |
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157 while (*beg == ' ') |
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158 beg++; |
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159 |
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160 if (*beg == '\0') |
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161 break; |
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162 |
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163 tok_count++; |
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164 if (tok_count >= max_toks) |
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165 goto done; |
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166 |
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167 s2[tok_count] = beg; |
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168 } |
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526
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169 s2[tok_count+1] = 0; |
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287
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170 |
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171 s2 = to_match; |
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172 |
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173 for (;;) |
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174 { |
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175 if (! almost_match (*s1, *s2, min_len[toks_matched], 0)) |
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176 goto done; |
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177 |
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178 toks_matched++; |
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179 |
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180 s1++; |
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181 s2++; |
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182 |
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183 if (! *s2) |
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184 { |
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185 status = (toks_matched >= min_toks_to_match); |
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186 goto done; |
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187 } |
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188 |
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189 if (! *s1) |
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190 goto done; |
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191 } |
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192 |
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193 done: |
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194 |
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195 delete [] kw; |
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196 delete [] to_match; |
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197 |
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198 return status; |
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1
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199 } |
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200 |
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2234
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201 // Return non-zero if either NR or NC is zero. Return -1 if this |
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202 // should be considered fatal; return 1 if this is ok. |
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203 |
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204 int |
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205 empty_arg (const char *name, int nr, int nc) |
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206 { |
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207 int is_empty = 0; |
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208 |
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209 if (nr == 0 || nc == 0) |
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210 { |
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211 int flag = Vpropagate_empty_matrices; |
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212 |
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213 if (flag < 0) |
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214 { |
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215 gripe_empty_arg (name, 0); |
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216 is_empty = 1; |
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217 } |
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218 else if (flag == 0) |
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219 { |
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220 gripe_empty_arg (name, 1); |
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221 is_empty = -1; |
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222 } |
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223 else |
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224 is_empty = 1; |
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225 } |
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226 |
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227 return is_empty; |
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228 } |
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229 |
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581
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230 // See if the given file is in the path. |
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231 |
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1755
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232 string |
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3174
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233 search_path_for_file (const string& path, const string& name) |
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686
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234 { |
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3174
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235 dir_path p (path); |
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686
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236 |
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2926
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237 return octave_env::make_absolute (p.find (name), octave_env::getcwd ()); |
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686
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238 } |
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239 |
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3195
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240 DEFUN (file_in_loadpath, args, , |
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241 "file_in_loadpath (NAME)\n\ |
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242 \n\ |
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243 Look up NAME in LOADPATH. See also file_in_path") |
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244 { |
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245 octave_value_list retval; |
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246 |
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247 int argc = args.length () + 1; |
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248 |
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249 string_vector argv = args.make_argv ("file_in_loadpath"); |
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250 |
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251 if (error_state) |
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252 return retval; |
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253 |
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3225
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254 if (argc == 2) |
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3195
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255 retval = octave_env::make_absolute (Vload_path_dir_path.find (argv[1]), |
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256 octave_env::getcwd ()); |
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257 else |
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258 print_usage ("file_in_loadpath"); |
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259 |
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260 return retval; |
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261 } |
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262 |
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1957
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263 DEFUN (file_in_path, args, , |
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3301
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264 "-*- texinfo -*-\n\ |
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265 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
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266 Return the absolute name name of @var{file} if it can be found in\n\ |
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267 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
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268 directories in the format described for the built-in variable\n\ |
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269 @code{LOADPATH}.\n\ |
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270 \n\ |
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271 If the file cannot be found in the path, an empty matrix is returned.\n\ |
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272 For example,\n\ |
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273 \n\ |
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274 @example\n\ |
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275 file_in_path (LOADPATH, \"nargchk.m\")\n\ |
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276 @result{} \"@value{OCTAVEHOME}/share/octave/2.0/m/general/nargchk.m\"\n\ |
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277 @end example\n\ |
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278 @end deftypefn") |
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686
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279 { |
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2086
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280 octave_value_list retval; |
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686
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281 |
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1755
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282 int argc = args.length () + 1; |
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283 |
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1968
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284 string_vector argv = args.make_argv ("file_in_path"); |
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1755
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285 |
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286 if (error_state) |
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287 return retval; |
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686
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288 |
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289 if (argc == 3) |
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290 { |
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3195
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291 string fname = search_path_for_file (argv[1], argv[2]); |
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686
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292 |
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1755
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293 if (fname.empty ()) |
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294 retval = Matrix (); |
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295 else |
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686
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296 retval = fname; |
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297 } |
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298 else |
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299 print_usage ("file_in_path"); |
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300 |
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301 return retval; |
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302 } |
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303 |
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1755
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304 string |
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305 file_in_path (const string& name, const string& suffix) |
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526
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306 { |
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1755
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307 string nm = name; |
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526
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308 |
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1755
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309 if (! suffix.empty ()) |
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310 nm.append (suffix); |
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686
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311 |
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3174
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312 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
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313 octave_env::getcwd ()); |
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526
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314 } |
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315 |
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581
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316 // See if there is an function file in the path. If so, return the |
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317 // full path to the file. |
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318 |
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1755
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319 string |
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320 fcn_file_in_path (const string& name) |
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526
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321 { |
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1755
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322 string retval; |
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908
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323 |
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1755
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324 int len = name.length (); |
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325 |
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326 if (len > 0) |
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327 { |
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328 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
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329 retval = file_in_path (name, ""); |
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908
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330 else |
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1755
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331 retval = file_in_path (name, ".m"); |
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908
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332 } |
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1755
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333 |
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334 return retval; |
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526
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335 } |
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336 |
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581
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337 // See if there is an octave file in the path. If so, return the |
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338 // full path to the file. |
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339 |
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1755
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340 string |
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341 oct_file_in_path (const string& name) |
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572
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342 { |
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1755
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343 string retval; |
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908
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344 |
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1755
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345 int len = name.length (); |
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346 |
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347 if (len > 0) |
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348 { |
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349 if (len > 2 && name [len - 4] == '.' && name [len - 3] == 'o' |
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908
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350 && name [len - 2] == 'c' && name [len - 1] == 't') |
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1755
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351 retval = file_in_path (name, ""); |
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908
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352 else |
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1755
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353 retval = file_in_path (name, ".oct"); |
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908
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354 } |
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1755
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355 |
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356 return retval; |
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572
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357 } |
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358 |
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3103
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359 // Replace backslash escapes in a string with the real values. |
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360 |
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361 string |
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362 do_string_escapes (const string& s) |
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363 { |
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364 string retval; |
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365 |
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366 size_t i = 0; |
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367 size_t j = 0; |
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368 size_t len = s.length (); |
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369 |
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370 retval.resize (len); |
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371 |
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372 while (j < len) |
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373 { |
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374 if (s[j] == '\\' && j+1 < len) |
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375 { |
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376 switch (s[++j]) |
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377 { |
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378 case 'a': |
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379 retval[i] = '\a'; |
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380 break; |
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381 |
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382 case 'b': // backspace |
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383 retval[i] = '\b'; |
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384 break; |
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385 |
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386 case 'f': // formfeed |
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387 retval[i] = '\f'; |
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388 break; |
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389 |
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390 case 'n': // newline |
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391 retval[i] = '\n'; |
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392 break; |
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393 |
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394 case 'r': // carriage return |
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395 retval[i] = '\r'; |
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396 break; |
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397 |
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398 case 't': // horizontal tab |
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399 retval[i] = '\t'; |
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400 break; |
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401 |
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402 case 'v': // vertical tab |
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403 retval[i] = '\v'; |
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404 break; |
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405 |
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406 case '\\': // backslash |
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407 retval[i] = '\\'; |
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408 break; |
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409 |
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410 case '\'': // quote |
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411 retval[i] = '\''; |
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412 break; |
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413 |
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414 case '"': // double quote |
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415 retval[i] = '"'; |
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416 break; |
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417 |
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418 default: |
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419 warning ("unrecognized escape sequence `\\%c' --\ |
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420 converting to `%c'", s[j], s[j]); |
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421 retval[i] = s[j]; |
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422 break; |
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423 } |
|
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424 } |
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425 else |
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426 { |
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427 retval[i] = s[j]; |
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428 } |
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429 |
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430 i++; |
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431 j++; |
|
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432 } |
|
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433 |
|
3105
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434 retval.resize (i); |
|
3103
|
435 |
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436 return retval; |
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|
437 } |
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438 |
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439 DEFUN (do_string_escapes, args, , |
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440 "do_string_escapes (STRING)") |
|
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441 { |
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442 octave_value retval; |
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443 |
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444 int nargin = args.length (); |
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445 |
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446 if (nargin == 1) |
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447 { |
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448 if (args(0).is_string ()) |
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449 retval = do_string_escapes (args(0).string_value ()); |
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450 else |
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451 error ("do_string_escapes: argument must be a string"); |
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452 } |
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453 else |
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454 print_usage ("do_string_escapes"); |
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455 |
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456 return retval; |
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457 } |
|
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458 |
|
1755
|
459 const char * |
|
801
|
460 undo_string_escape (char c) |
|
|
461 { |
|
|
462 if (! c) |
|
1755
|
463 return ""; |
|
801
|
464 |
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465 switch (c) |
|
|
466 { |
|
|
467 case '\a': |
|
|
468 return "\\a"; |
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469 |
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470 case '\b': // backspace |
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|
471 return "\\b"; |
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|
472 |
|
|
473 case '\f': // formfeed |
|
|
474 return "\\f"; |
|
|
475 |
|
|
476 case '\n': // newline |
|
|
477 return "\\n"; |
|
|
478 |
|
|
479 case '\r': // carriage return |
|
|
480 return "\\r"; |
|
|
481 |
|
|
482 case '\t': // horizontal tab |
|
|
483 return "\\t"; |
|
|
484 |
|
|
485 case '\v': // vertical tab |
|
|
486 return "\\v"; |
|
|
487 |
|
|
488 case '\\': // backslash |
|
|
489 return "\\\\"; |
|
|
490 |
|
|
491 case '"': // double quote |
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|
492 return "\\\""; |
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|
493 |
|
|
494 default: |
|
1755
|
495 { |
|
|
496 static char retval[2]; |
|
|
497 retval[0] = c; |
|
|
498 retval[1] = '\0'; |
|
|
499 return retval; |
|
|
500 } |
|
801
|
501 } |
|
|
502 } |
|
|
503 |
|
1755
|
504 string |
|
|
505 undo_string_escapes (const string& s) |
|
801
|
506 { |
|
1755
|
507 string retval; |
|
801
|
508 |
|
1755
|
509 for (size_t i = 0; i < s.length (); i++) |
|
|
510 retval.append (undo_string_escape (s[i])); |
|
801
|
511 |
|
1755
|
512 return retval; |
|
801
|
513 } |
|
|
514 |
|
1957
|
515 DEFUN (undo_string_escapes, args, , |
|
3361
|
516 "-*- texinfo -*-\n\ |
|
|
517 @deftypefn {Built-in Function} {} undo_string_escapes (@var{s})\n\ |
|
|
518 Converts special characters in strings back to their escaped forms. For\n\ |
|
|
519 example, the expression\n\ |
|
|
520 \n\ |
|
|
521 @example\n\ |
|
|
522 bell = \"\\a\";\n\ |
|
|
523 @end example\n\ |
|
|
524 \n\ |
|
|
525 @noindent\n\ |
|
|
526 assigns the value of the alert character (control-g, ASCII code 7) to\n\ |
|
|
527 the string variable @code{bell}. If this string is printed, the\n\ |
|
|
528 system will ring the terminal bell (if it is possible). This is\n\ |
|
|
529 normally the desired outcome. However, sometimes it is useful to be\n\ |
|
|
530 able to print the original representation of the string, with the\n\ |
|
|
531 special characters replaced by their escape sequences. For example,\n\ |
|
|
532 \n\ |
|
|
533 @example\n\ |
|
|
534 octave:13> undo_string_escapes (bell)\n\ |
|
|
535 ans = \\a\n\ |
|
|
536 @end example\n\ |
|
|
537 \n\ |
|
|
538 @noindent\n\ |
|
|
539 replaces the unprintable alert character with its printable\n\ |
|
|
540 representation.\n\ |
|
|
541 @end deftypefn") |
|
801
|
542 { |
|
2086
|
543 octave_value retval; |
|
801
|
544 |
|
|
545 int nargin = args.length (); |
|
|
546 |
|
3103
|
547 if (nargin == 1) |
|
|
548 { |
|
|
549 if (args(0).is_string ()) |
|
|
550 retval = undo_string_escapes (args(0).string_value ()); |
|
|
551 else |
|
|
552 error ("undo_string_escapes: argument must be a string"); |
|
|
553 } |
|
801
|
554 else |
|
1023
|
555 print_usage ("undo_string_escapes"); |
|
801
|
556 |
|
|
557 return retval; |
|
|
558 } |
|
|
559 |
|
2285
|
560 static void |
|
|
561 warn_old_style_preference (bool val, const string& sval) |
|
|
562 { |
|
|
563 warning |
|
|
564 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
565 sval.c_str (), (val ? 1 : 0)); |
|
|
566 } |
|
|
567 |
|
2204
|
568 // Check the value of a string variable to see if it it's ok to do |
|
|
569 // something. |
|
|
570 // |
|
|
571 // return of 1 => always ok. |
|
|
572 // return of 0 => never ok. |
|
|
573 // return of -1 => ok, but give me warning (default). |
|
|
574 |
|
|
575 int |
|
|
576 check_preference (const string& var) |
|
|
577 { |
|
|
578 int pref = -1; |
|
|
579 |
|
|
580 string val = builtin_string_variable (var); |
|
|
581 |
|
|
582 if (val.empty ()) |
|
|
583 { |
|
|
584 double dval = 0; |
|
|
585 if (builtin_real_scalar_variable (var, dval)) |
|
|
586 pref = NINT (dval); |
|
|
587 } |
|
|
588 else |
|
|
589 { |
|
|
590 if (val.compare ("yes", 0, 3) == 0 |
|
|
591 || val.compare ("true", 0, 4) == 0) |
|
2285
|
592 { |
|
|
593 warn_old_style_preference (true, val); |
|
|
594 pref = 1; |
|
|
595 } |
|
2204
|
596 else if (val.compare ("never", 0, 5) == 0 |
|
|
597 || val.compare ("no", 0, 2) == 0 |
|
|
598 || val.compare ("false", 0, 5) == 0) |
|
2285
|
599 { |
|
|
600 warn_old_style_preference (false, val); |
|
|
601 pref = 0; |
|
|
602 } |
|
2204
|
603 } |
|
|
604 |
|
|
605 return pref; |
|
|
606 } |
|
|
607 |
|
3354
|
608 static void |
|
|
609 check_dimensions (int& nr, int& nc, const char *warnfor) |
|
|
610 { |
|
|
611 if (nr < 0 || nc < 0) |
|
|
612 { |
|
|
613 if (Vtreat_neg_dim_as_zero) |
|
|
614 { |
|
|
615 nr = (nr < 0) ? 0 : nr; |
|
|
616 nc = (nc < 0) ? 0 : nc; |
|
|
617 |
|
|
618 if (Vtreat_neg_dim_as_zero < 0) |
|
|
619 warning ("%s: converting negative dimension to zero", |
|
|
620 warnfor); |
|
|
621 } |
|
|
622 else |
|
|
623 error ("%s: can't create a matrix with negative dimensions", |
|
|
624 warnfor); |
|
|
625 } |
|
|
626 } |
|
|
627 |
|
|
628 void |
|
|
629 get_dimensions (const octave_value& a, const char *warn_for, |
|
|
630 int& nr, int& nc) |
|
|
631 { |
|
|
632 if (a.is_scalar_type ()) |
|
|
633 { |
|
|
634 nr = nc = a.nint_value (); |
|
|
635 } |
|
|
636 else |
|
|
637 { |
|
|
638 nr = a.rows (); |
|
|
639 nc = a.columns (); |
|
|
640 |
|
|
641 if ((nr == 1 && nc == 2) || (nr == 2 && nc == 1)) |
|
|
642 { |
|
3419
|
643 Array<double> v = a.vector_value (); |
|
3354
|
644 |
|
|
645 if (error_state) |
|
|
646 return; |
|
|
647 |
|
|
648 nr = NINT (v (0)); |
|
|
649 nc = NINT (v (1)); |
|
|
650 } |
|
|
651 else |
|
|
652 warning ("%s (A): use %s (size (A)) instead", warn_for, warn_for); |
|
|
653 } |
|
|
654 |
|
|
655 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
656 } |
|
|
657 |
|
|
658 void |
|
|
659 get_dimensions (const octave_value& a, const octave_value& b, |
|
|
660 const char *warn_for, int& nr, int& nc) |
|
|
661 { |
|
|
662 nr = a.is_empty () ? 0 : a.nint_value (); |
|
|
663 nc = b.is_empty () ? 0 : b.nint_value (); |
|
|
664 |
|
|
665 if (error_state) |
|
|
666 error ("%s: expecting two scalar arguments", warn_for); |
|
|
667 else |
|
|
668 check_dimensions (nr, nc, warn_for); // May set error_state. |
|
|
669 } |
|
|
670 |
|
|
671 static int |
|
|
672 treat_neg_dim_as_zero (void) |
|
|
673 { |
|
|
674 Vtreat_neg_dim_as_zero = check_preference ("treat_neg_dim_as_zero"); |
|
|
675 |
|
|
676 return 0; |
|
|
677 } |
|
|
678 |
|
|
679 void |
|
|
680 symbols_of_utils (void) |
|
|
681 { |
|
|
682 DEFVAR (treat_neg_dim_as_zero, 0.0, treat_neg_dim_as_zero, |
|
3369
|
683 "-*- texinfo -*-\n\ |
|
|
684 @defvr {Built-in Variable} treat_neg_dim_as_zero\n\ |
|
|
685 If the value of @code{treat_neg_dim_as_zero} is nonzero, expressions\n\ |
|
|
686 like\n\ |
|
|
687 \n\ |
|
|
688 @example\n\ |
|
|
689 eye (-1)\n\ |
|
|
690 @end example\n\ |
|
|
691 \n\ |
|
|
692 @noindent\n\ |
|
|
693 produce an empty matrix (i.e., row and column dimensions are zero).\n\ |
|
|
694 Otherwise, an error message is printed and control is returned to the\n\ |
|
|
695 top level. The default value is 0.\n\ |
|
|
696 @end defvr"); |
|
3354
|
697 } |
|
|
698 |
|
572
|
699 /* |
|
1
|
700 ;;; Local Variables: *** |
|
|
701 ;;; mode: C++ *** |
|
|
702 ;;; End: *** |
|
|
703 */ |
