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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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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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1755
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93 almost_match (const string& std, const 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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3072
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109 keyword_almost_match (const char * const *std, int *min_len, const 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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1755
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226 string |
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3174
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227 search_path_for_file (const string& path, const 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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235 "file_in_loadpath (NAME)\n\ |
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236 \n\ |
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237 Look up NAME in LOADPATH. See also file_in_path") |
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238 { |
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239 octave_value_list retval; |
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240 |
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241 int argc = args.length () + 1; |
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242 |
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243 string_vector argv = args.make_argv ("file_in_loadpath"); |
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244 |
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245 if (error_state) |
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246 return retval; |
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247 |
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3225
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248 if (argc == 2) |
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3195
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249 retval = octave_env::make_absolute (Vload_path_dir_path.find (argv[1]), |
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250 octave_env::getcwd ()); |
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251 else |
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252 print_usage ("file_in_loadpath"); |
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253 |
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254 return retval; |
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255 } |
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256 |
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1957
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257 DEFUN (file_in_path, args, , |
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3301
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258 "-*- texinfo -*-\n\ |
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259 @deftypefn {Built-in Function} {} file_in_path (@var{path}, @var{file})\n\ |
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260 Return the absolute name name of @var{file} if it can be found in\n\ |
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261 @var{path}. The value of @var{path} should be a colon-separated list of\n\ |
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262 directories in the format described for the built-in variable\n\ |
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263 @code{LOADPATH}.\n\ |
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264 \n\ |
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265 If the file cannot be found in the path, an empty matrix is returned.\n\ |
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266 For example,\n\ |
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267 \n\ |
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268 @example\n\ |
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269 file_in_path (LOADPATH, \"nargchk.m\")\n\ |
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270 @result{} \"@value{OCTAVEHOME}/share/octave/2.0/m/general/nargchk.m\"\n\ |
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271 @end example\n\ |
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272 @end deftypefn") |
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686
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273 { |
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2086
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274 octave_value_list retval; |
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686
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275 |
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1755
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276 int argc = args.length () + 1; |
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277 |
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1968
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278 string_vector argv = args.make_argv ("file_in_path"); |
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1755
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279 |
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280 if (error_state) |
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281 return retval; |
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686
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282 |
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283 if (argc == 3) |
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284 { |
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3195
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285 string fname = search_path_for_file (argv[1], argv[2]); |
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686
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286 |
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1755
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287 if (fname.empty ()) |
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288 retval = Matrix (); |
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289 else |
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686
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290 retval = fname; |
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291 } |
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292 else |
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293 print_usage ("file_in_path"); |
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294 |
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295 return retval; |
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296 } |
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297 |
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1755
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298 string |
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299 file_in_path (const string& name, const string& suffix) |
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526
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300 { |
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1755
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301 string nm = name; |
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526
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302 |
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1755
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303 if (! suffix.empty ()) |
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304 nm.append (suffix); |
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686
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305 |
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3174
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306 return octave_env::make_absolute (Vload_path_dir_path.find (nm), |
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307 octave_env::getcwd ()); |
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526
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308 } |
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309 |
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581
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310 // See if there is an function file in the path. If so, return the |
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311 // full path to the file. |
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312 |
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1755
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313 string |
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314 fcn_file_in_path (const string& name) |
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526
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315 { |
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1755
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316 string retval; |
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908
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317 |
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1755
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318 int len = name.length (); |
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319 |
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320 if (len > 0) |
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321 { |
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322 if (len > 2 && name [len - 2] == '.' && name [len - 1] == 'm') |
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323 retval = file_in_path (name, ""); |
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908
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324 else |
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1755
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325 retval = file_in_path (name, ".m"); |
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908
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326 } |
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1755
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327 |
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328 return retval; |
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526
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329 } |
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330 |
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581
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331 // See if there is an octave file in the path. If so, return the |
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332 // full path to the file. |
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333 |
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1755
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334 string |
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335 oct_file_in_path (const string& name) |
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572
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336 { |
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1755
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337 string retval; |
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908
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338 |
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1755
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339 int len = name.length (); |
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340 |
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341 if (len > 0) |
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342 { |
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343 if (len > 2 && name [len - 4] == '.' && name [len - 3] == 'o' |
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908
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344 && name [len - 2] == 'c' && name [len - 1] == 't') |
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1755
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345 retval = file_in_path (name, ""); |
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908
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346 else |
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1755
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347 retval = file_in_path (name, ".oct"); |
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908
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348 } |
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1755
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349 |
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350 return retval; |
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572
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351 } |
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352 |
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3103
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353 // Replace backslash escapes in a string with the real values. |
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354 |
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355 string |
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356 do_string_escapes (const string& s) |
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357 { |
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358 string retval; |
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359 |
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360 size_t i = 0; |
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361 size_t j = 0; |
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362 size_t len = s.length (); |
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363 |
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364 retval.resize (len); |
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365 |
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366 while (j < len) |
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367 { |
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368 if (s[j] == '\\' && j+1 < len) |
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369 { |
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370 switch (s[++j]) |
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371 { |
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372 case 'a': |
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373 retval[i] = '\a'; |
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374 break; |
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375 |
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376 case 'b': // backspace |
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377 retval[i] = '\b'; |
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378 break; |
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379 |
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380 case 'f': // formfeed |
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381 retval[i] = '\f'; |
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382 break; |
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383 |
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384 case 'n': // newline |
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385 retval[i] = '\n'; |
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386 break; |
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387 |
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388 case 'r': // carriage return |
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389 retval[i] = '\r'; |
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390 break; |
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391 |
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392 case 't': // horizontal tab |
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393 retval[i] = '\t'; |
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394 break; |
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395 |
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396 case 'v': // vertical tab |
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397 retval[i] = '\v'; |
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398 break; |
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399 |
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400 case '\\': // backslash |
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401 retval[i] = '\\'; |
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402 break; |
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403 |
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404 case '\'': // quote |
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405 retval[i] = '\''; |
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406 break; |
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407 |
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408 case '"': // double quote |
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409 retval[i] = '"'; |
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410 break; |
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411 |
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412 default: |
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413 warning ("unrecognized escape sequence `\\%c' --\ |
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414 converting to `%c'", s[j], s[j]); |
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415 retval[i] = s[j]; |
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416 break; |
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417 } |
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418 } |
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419 else |
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420 { |
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421 retval[i] = s[j]; |
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422 } |
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423 |
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424 i++; |
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425 j++; |
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426 } |
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427 |
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3105
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428 retval.resize (i); |
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3103
|
429 |
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430 return retval; |
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431 } |
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432 |
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433 DEFUN (do_string_escapes, args, , |
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434 "do_string_escapes (STRING)") |
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435 { |
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436 octave_value retval; |
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437 |
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438 int nargin = args.length (); |
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439 |
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440 if (nargin == 1) |
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441 { |
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442 if (args(0).is_string ()) |
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443 retval = do_string_escapes (args(0).string_value ()); |
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444 else |
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445 error ("do_string_escapes: argument must be a string"); |
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446 } |
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447 else |
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448 print_usage ("do_string_escapes"); |
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449 |
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450 return retval; |
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451 } |
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452 |
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1755
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453 const char * |
|
801
|
454 undo_string_escape (char c) |
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455 { |
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456 if (! c) |
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1755
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457 return ""; |
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801
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458 |
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459 switch (c) |
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460 { |
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461 case '\a': |
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462 return "\\a"; |
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463 |
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464 case '\b': // backspace |
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465 return "\\b"; |
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466 |
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467 case '\f': // formfeed |
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468 return "\\f"; |
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469 |
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470 case '\n': // newline |
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471 return "\\n"; |
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472 |
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473 case '\r': // carriage return |
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474 return "\\r"; |
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475 |
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476 case '\t': // horizontal tab |
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477 return "\\t"; |
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478 |
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479 case '\v': // vertical tab |
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|
480 return "\\v"; |
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481 |
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482 case '\\': // backslash |
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|
483 return "\\\\"; |
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|
484 |
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|
485 case '"': // double quote |
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|
486 return "\\\""; |
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|
487 |
|
|
488 default: |
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1755
|
489 { |
|
|
490 static char retval[2]; |
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|
491 retval[0] = c; |
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|
492 retval[1] = '\0'; |
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|
493 return retval; |
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|
494 } |
|
801
|
495 } |
|
|
496 } |
|
|
497 |
|
1755
|
498 string |
|
|
499 undo_string_escapes (const string& s) |
|
801
|
500 { |
|
1755
|
501 string retval; |
|
801
|
502 |
|
1755
|
503 for (size_t i = 0; i < s.length (); i++) |
|
|
504 retval.append (undo_string_escape (s[i])); |
|
801
|
505 |
|
1755
|
506 return retval; |
|
801
|
507 } |
|
|
508 |
|
1957
|
509 DEFUN (undo_string_escapes, args, , |
|
801
|
510 "undo_string_escapes (STRING)") |
|
|
511 { |
|
2086
|
512 octave_value retval; |
|
801
|
513 |
|
|
514 int nargin = args.length (); |
|
|
515 |
|
3103
|
516 if (nargin == 1) |
|
|
517 { |
|
|
518 if (args(0).is_string ()) |
|
|
519 retval = undo_string_escapes (args(0).string_value ()); |
|
|
520 else |
|
|
521 error ("undo_string_escapes: argument must be a string"); |
|
|
522 } |
|
801
|
523 else |
|
1023
|
524 print_usage ("undo_string_escapes"); |
|
801
|
525 |
|
|
526 return retval; |
|
|
527 } |
|
|
528 |
|
2285
|
529 static void |
|
|
530 warn_old_style_preference (bool val, const string& sval) |
|
|
531 { |
|
|
532 warning |
|
|
533 ("preference of \"%s\" is obsolete -- use numeric value of %d instead", |
|
|
534 sval.c_str (), (val ? 1 : 0)); |
|
|
535 } |
|
|
536 |
|
2204
|
537 // Check the value of a string variable to see if it it's ok to do |
|
|
538 // something. |
|
|
539 // |
|
|
540 // return of 1 => always ok. |
|
|
541 // return of 0 => never ok. |
|
|
542 // return of -1 => ok, but give me warning (default). |
|
|
543 |
|
|
544 int |
|
|
545 check_preference (const string& var) |
|
|
546 { |
|
|
547 int pref = -1; |
|
|
548 |
|
|
549 string val = builtin_string_variable (var); |
|
|
550 |
|
|
551 if (val.empty ()) |
|
|
552 { |
|
|
553 double dval = 0; |
|
|
554 if (builtin_real_scalar_variable (var, dval)) |
|
|
555 pref = NINT (dval); |
|
|
556 } |
|
|
557 else |
|
|
558 { |
|
|
559 if (val.compare ("yes", 0, 3) == 0 |
|
|
560 || val.compare ("true", 0, 4) == 0) |
|
2285
|
561 { |
|
|
562 warn_old_style_preference (true, val); |
|
|
563 pref = 1; |
|
|
564 } |
|
2204
|
565 else if (val.compare ("never", 0, 5) == 0 |
|
|
566 || val.compare ("no", 0, 2) == 0 |
|
|
567 || val.compare ("false", 0, 5) == 0) |
|
2285
|
568 { |
|
|
569 warn_old_style_preference (false, val); |
|
|
570 pref = 0; |
|
|
571 } |
|
2204
|
572 } |
|
|
573 |
|
|
574 return pref; |
|
|
575 } |
|
|
576 |
|
572
|
577 /* |
|
1
|
578 ;;; Local Variables: *** |
|
|
579 ;;; mode: C++ *** |
|
|
580 ;;; End: *** |
|
|
581 */ |
