Mercurial > hg > octave-lyh
annotate liboctave/oct-rl-hist.c @ 14819:67b6b47a22f6
doc: Clarify docstrings for canonicalize_file_name, make_absolute_filename
* syscalls.cc (canonicalize_file_name): Clarify docstring.
* utils.cc (make_absolute_filename): Clarify docstring.
| author | Rik <octave@nomad.inbox5.com> |
|---|---|
| date | Fri, 29 Jun 2012 13:38:28 -0700 |
| parents | 72c96de7a403 |
| children |
| rev | line source |
|---|---|
| 3519 | 1 /* |
| 2 | |
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3 Copyright (C) 2000-2012 John W. Eaton |
| 3519 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 3519 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 3519 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
|
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27 #include "oct-rl-hist.h" |
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28 |
| 3519 | 29 #if defined (USE_READLINE) |
| 30 | |
| 31 #include <stdio.h> | |
| 32 #include <stdlib.h> | |
| 4587 | 33 #include <string.h> |
| 3519 | 34 |
| 35 #include <readline/history.h> | |
| 36 | |
|
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37 /* check_history_control, hc_erasedup, and the core of |
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38 octave_add_history were borrowed from Bash. */ |
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39 |
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40 /* Check LINE against what HISTCONTROL says to do. Returns 1 if the line |
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41 should be saved; 0 if it should be discarded. */ |
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42 static int |
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43 check_history_control (const char *line, int history_control) |
| 3519 | 44 { |
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45 HIST_ENTRY *temp; |
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46 int r; |
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47 |
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48 if (history_control == 0) |
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49 return 1; |
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50 |
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51 /* ignorespace or ignoreboth */ |
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52 if ((history_control & HC_IGNSPACE) && *line == ' ') |
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53 return 0; |
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54 |
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55 /* ignoredups or ignoreboth */ |
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56 if (history_control & HC_IGNDUPS) |
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57 { |
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58 using_history (); |
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59 temp = previous_history (); |
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60 |
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61 r = (temp == 0 || strcmp (temp->line, line)); |
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62 |
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63 using_history (); |
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64 |
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65 if (r == 0) |
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66 return r; |
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67 } |
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68 |
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69 return 1; |
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70 } |
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71 |
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72 /* Remove all entries matching LINE from the history list. Triggered when |
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73 HISTCONTROL includes `erasedups'. */ |
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74 |
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75 static void |
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76 hc_erasedups (const char *line) |
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77 { |
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78 HIST_ENTRY *temp; |
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79 int r; |
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80 |
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81 using_history (); |
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82 while ((temp = previous_history ())) |
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83 { |
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84 if (! strcmp (temp->line, line)) |
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85 { |
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86 r = where_history (); |
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87 remove_history (r); |
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88 } |
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89 } |
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90 using_history (); |
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91 } |
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92 |
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93 /* Check LINE against HISTCONTROL and add it to the history if it's OK. |
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94 Returns 1 if the line was saved in the history, 0 otherwise. */ |
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95 |
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96 int |
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97 octave_add_history (const char *line, int history_control) |
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98 { |
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99 if (check_history_control (line, history_control)) |
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100 { |
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101 /* We're committed to saving the line. If the user has requested it, |
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102 remove other matching lines from the history. */ |
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103 |
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104 if (history_control & HC_ERASEDUPS) |
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105 hc_erasedups (line); |
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106 |
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107 add_history (line); |
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108 |
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109 return 1; |
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110 } |
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111 |
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112 return 0; |
| 3519 | 113 } |
| 114 | |
| 115 int | |
| 116 octave_where_history (void) | |
| 117 { | |
| 118 return where_history (); | |
| 119 } | |
| 120 | |
| 121 int | |
| 122 octave_history_length (void) | |
| 123 { | |
| 124 return history_length; | |
| 125 } | |
| 126 | |
| 127 int | |
| 128 octave_max_input_history (void) | |
| 129 { | |
| 130 return max_input_history; | |
| 131 } | |
| 132 | |
| 133 int | |
| 134 octave_history_base (void) | |
| 135 { | |
| 136 return history_base; | |
| 137 } | |
| 138 | |
| 139 void | |
| 140 octave_stifle_history (int n) | |
| 141 { | |
| 3520 | 142 stifle_history (n); |
| 3519 | 143 } |
| 144 | |
| 145 int | |
| 146 octave_unstifle_history (void) | |
| 147 { | |
| 148 return unstifle_history (); | |
| 149 } | |
| 150 | |
| 151 int | |
| 152 octave_history_is_stifled (void) | |
| 153 { | |
| 154 return history_is_stifled (); | |
| 155 } | |
| 156 | |
| 157 int | |
| 158 octave_history_set_pos (int n) | |
| 159 { | |
| 160 return history_set_pos (n); | |
| 161 } | |
| 162 | |
| 163 int | |
| 164 octave_read_history (const char *f) | |
| 165 { | |
| 166 return read_history (f); | |
| 167 } | |
| 168 | |
| 169 void | |
| 170 octave_using_history (void) | |
| 171 { | |
| 3520 | 172 using_history (); |
| 3519 | 173 } |
| 174 | |
| 175 int | |
| 176 octave_read_history_range (const char *f, int b, int e) | |
| 177 { | |
| 178 return read_history_range (f, b, e); | |
| 179 } | |
| 180 | |
| 181 int | |
| 182 octave_write_history (const char *f) | |
| 183 { | |
| 184 return write_history (f); | |
| 185 } | |
| 186 | |
| 187 int | |
| 188 octave_append_history (int n, const char *f) | |
| 189 { | |
| 190 return append_history (n, f); | |
| 191 } | |
| 192 | |
| 193 int | |
| 194 octave_history_truncate_file (const char *f, int n) | |
| 195 { | |
| 196 return history_truncate_file (f, n); | |
| 197 } | |
| 198 | |
| 199 void | |
| 200 octave_remove_history (int n) | |
| 201 { | |
| 202 HIST_ENTRY *discard = remove_history (n); | |
| 203 | |
| 204 if (discard) | |
| 205 { | |
| 206 if (discard->line) | |
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207 free (discard->line); |
| 3519 | 208 |
| 209 free (discard); | |
| 210 } | |
| 211 } | |
| 212 | |
| 213 char * | |
| 214 octave_history_goto_mark (int n) | |
| 215 { | |
| 216 HIST_ENTRY *h; | |
| 217 | |
| 218 char *retval = 0; | |
| 219 | |
| 220 if (history_set_pos (n)) | |
| 221 { | |
| 222 h = current_history (); | |
| 223 | |
| 224 if (h) | |
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225 retval = h->line; |
| 3519 | 226 } |
| 227 | |
| 228 return retval; | |
| 229 } | |
| 230 | |
| 231 char * | |
| 232 octave_history_get (int n) | |
| 233 { | |
| 234 char *retval = 0; | |
| 235 | |
| 236 HIST_ENTRY *h = history_get (n); | |
| 237 | |
| 238 if (h) | |
| 239 retval = h->line; | |
| 240 | |
| 241 return retval; | |
| 242 } | |
| 243 | |
| 244 char ** | |
| 245 octave_history_list (int limit, int number_lines) | |
| 246 { | |
| 247 static char **retval = 0; | |
| 248 | |
| 249 HIST_ENTRY **hlist = 0; | |
| 250 | |
| 251 if (retval) | |
| 252 { | |
| 253 char **p = retval; | |
| 254 | |
| 3598 | 255 while (*p) |
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256 free (*p++); |
| 3519 | 257 |
| 258 free (retval); | |
| 259 | |
| 260 retval = 0; | |
| 261 } | |
| 262 | |
| 263 hlist = history_list (); | |
| 264 | |
| 265 if (hlist) | |
| 266 { | |
| 267 int i, k; | |
| 268 | |
| 269 int beg = 0; | |
| 270 int end = 0; | |
| 271 while (hlist[end]) | |
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272 end++; |
| 3519 | 273 |
| 274 beg = (limit < 0 || end < limit) ? 0 : (end - limit); | |
| 275 | |
| 276 retval = malloc ((end - beg + 1) * sizeof (char **)); | |
| 277 | |
| 278 k = 0; | |
| 279 for (i = beg; i < end; i++) | |
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280 { |
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281 char *line = hlist[i]->line; |
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282 int len = line ? strlen (line) : 0; |
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283 char *tmp = malloc (len + 64); |
| 3519 | 284 |
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285 if (number_lines) |
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286 sprintf (tmp, "%5d%c%s", i + history_base, |
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287 hlist[i]->data ? '*' : ' ', |
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288 line ? line : ""); |
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289 else |
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290 sprintf (tmp, "%c%s", hlist[i]->data ? '*' : ' ', |
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291 line ? line : ""); |
| 3519 | 292 |
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293 retval[k++] = tmp; |
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294 } |
| 3519 | 295 |
| 296 retval[k] = 0; | |
| 297 } | |
| 298 | |
| 299 return retval; | |
| 300 } | |
| 301 | |
| 302 void | |
| 303 octave_replace_history_entry (int which, const char *line) | |
| 304 { | |
| 305 HIST_ENTRY *discard = replace_history_entry (which, line, 0); | |
| 306 | |
| 307 if (discard) | |
| 308 { | |
| 309 if (discard->line) | |
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310 free (discard->line); |
| 3519 | 311 |
| 312 free (discard); | |
| 313 } | |
| 314 } | |
| 315 | |
| 316 #endif |