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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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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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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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2939
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23 // Get command input interactively or from files. |
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24 |
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240
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25 #ifdef HAVE_CONFIG_H |
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1192
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26 #include <config.h> |
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1
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27 #endif |
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28 |
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1343
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29 #include <ctime> |
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30 #include <cstdio> |
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31 #include <cstdlib> |
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32 #include <cstring> |
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33 #include <cassert> |
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34 #include <csignal> |
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35 |
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1728
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36 #include <string> |
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37 |
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1349
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38 #include <iostream.h> |
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39 |
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1350
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40 #ifdef HAVE_UNISTD_H |
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2442
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41 #ifdef HAVE_SYS_TYPES_H |
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529
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42 #include <sys/types.h> |
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2442
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43 #endif |
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529
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44 #include <unistd.h> |
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45 #endif |
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1343
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46 |
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2927
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47 #include "cmd-edit.h" |
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1755
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48 #include "str-vec.h" |
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49 |
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1352
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50 #include "defun.h" |
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51 #include "dirfns.h" |
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1
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52 #include "error.h" |
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2181
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53 #include "gripes.h" |
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3016
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54 #include "help.h" |
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1
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55 #include "input.h" |
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1352
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56 #include "oct-map.h" |
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1742
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57 #include "oct-hist.h" |
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1670
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58 #include "toplev.h" |
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1755
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59 #include "oct-obj.h" |
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1
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60 #include "pager.h" |
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529
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61 #include "parse.h" |
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1352
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62 #include "pathlen.h" |
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1755
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63 #include "pt-const.h" |
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1352
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64 #include "sighandlers.h" |
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65 #include "symtab.h" |
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1114
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66 #include "sysdep.h" |
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3098
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67 #include "unwind-prot.h" |
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1352
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68 #include "utils.h" |
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69 #include "variables.h" |
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529
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70 |
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2181
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71 // Primary prompt string. |
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72 static string Vps1; |
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73 |
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74 // Secondary prompt string. |
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75 static string Vps2; |
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76 |
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77 // String printed before echoed input (enabled by --echo-input). |
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78 string Vps4; |
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79 |
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3019
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80 // Echo commands as they are executed? |
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81 // |
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82 // 1 ==> echo commands read from script files |
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83 // 2 ==> echo commands from functions |
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84 // 4 ==> echo commands read from command line |
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85 // |
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86 // more than one state can be active at once. |
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87 int Vecho_executing_commands; |
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88 |
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3165
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89 // The time we last printed a prompt. |
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90 time_t Vlast_prompt_time; |
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91 |
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2181
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92 // Character to append after successful command-line completion attempts. |
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93 static char Vcompletion_append_char; |
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94 |
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1
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95 // Global pointer for eval(). |
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1755
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96 string current_eval_string; |
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1
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97 |
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3019
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98 // TRUE means get input from current_eval_string. |
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99 bool get_input_from_eval_string = false; |
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1
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100 |
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3019
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101 // TRUE means we're parsing a function file. |
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102 bool reading_fcn_file = false; |
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1
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103 |
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338
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104 // Simple name of function file we are reading. |
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1755
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105 string curr_fcn_file_name; |
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1606
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106 |
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107 // Full name of file we are reading. |
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1755
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108 string curr_fcn_file_full_name; |
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1
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109 |
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3019
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110 // TRUE means we're parsing a script file. |
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111 bool reading_script_file = false; |
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1
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112 |
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113 // If we are reading from an M-file, this is it. |
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529
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114 FILE *ff_instream = 0; |
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1
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115 |
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3019
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116 // TRUE means this is an interactive shell. |
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117 bool interactive = false; |
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1
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118 |
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3019
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119 // TRUE means the user forced this shell to be interactive (-i). |
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120 bool forced_interactive = false; |
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1
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121 |
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122 // Should we issue a prompt? |
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123 int promptflag = 1; |
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124 |
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125 // The current line of input, from wherever. |
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1755
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126 string current_input_line; |
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1
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127 |
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2299
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128 // TRUE after a call to completion_matches(). |
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129 bool octave_completion_matches_called = false; |
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130 |
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1044
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131 static void |
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1755
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132 do_input_echo (const string& input_string) |
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1044
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133 { |
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1588
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134 int do_echo = reading_script_file ? |
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2205
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135 (Vecho_executing_commands & ECHO_SCRIPTS) |
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2618
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136 : (Vecho_executing_commands & ECHO_CMD_LINE) && ! forced_interactive; |
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1588
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137 |
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138 if (do_echo) |
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1044
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139 { |
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1403
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140 if (forced_interactive) |
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141 { |
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1755
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142 if (promptflag > 0) |
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2927
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143 octave_stdout << command_editor::decode_prompt_string (Vps1); |
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1755
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144 else |
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2927
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145 octave_stdout << command_editor::decode_prompt_string (Vps2); |
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1403
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146 } |
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147 else |
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2927
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148 octave_stdout << command_editor::decode_prompt_string (Vps4); |
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1044
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149 |
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1755
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150 if (! input_string.empty ()) |
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1044
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151 { |
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2095
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152 octave_stdout << input_string; |
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153 |
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154 if (input_string[input_string.length () - 1] != '\n') |
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2095
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155 octave_stdout << "\n"; |
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1044
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156 } |
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157 } |
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158 } |
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159 |
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2927
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160 string |
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161 gnu_readline (const string& s, bool force_readline) |
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1822
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162 { |
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2927
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163 string retval; |
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1822
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164 |
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2927
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165 if (line_editing || force_readline) |
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1822
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166 { |
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2927
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167 retval = command_editor::readline (s); |
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1898
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168 |
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2927
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169 if (retval.empty ()) |
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170 retval = "\n"; |
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1822
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171 } |
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172 else |
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173 { |
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2927
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174 if (! s.empty () && (interactive || forced_interactive)) |
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2618
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175 { |
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2927
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176 FILE *stream = command_editor::get_output_stream (); |
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177 |
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178 fprintf (stream, s.c_str ()); |
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179 fflush (stream); |
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2618
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180 } |
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1822
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181 |
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2927
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182 FILE *curr_stream = command_editor::get_input_stream (); |
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183 |
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1822
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184 if (reading_fcn_file || reading_script_file) |
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185 curr_stream = ff_instream; |
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186 |
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2927
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187 retval = octave_fgets (curr_stream); |
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1822
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188 } |
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189 |
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190 return retval; |
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191 } |
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581
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192 |
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2927
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193 static string |
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1
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194 octave_gets (void) |
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195 { |
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2927
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196 string retval; |
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197 |
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3165
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198 Vlast_prompt_time = time (0); |
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199 |
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1822
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200 if ((interactive || forced_interactive) |
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201 && (! (reading_fcn_file || reading_script_file))) |
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1
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202 { |
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2927
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203 string ps = (promptflag > 0) ? Vps1 : Vps2; |
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1755
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204 |
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2927
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205 string prompt = command_editor::decode_prompt_string (ps); |
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1
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206 |
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2618
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207 pipe_handler_error_count = 0; |
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208 |
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209 flush_octave_stdout (); |
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1
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210 |
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2095
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211 octave_diary << prompt; |
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581
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212 |
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2927
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213 retval = gnu_readline (prompt); |
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1
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214 } |
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215 else |
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1822
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216 retval = gnu_readline (""); |
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1
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217 |
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2927
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218 current_input_line = retval; |
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1
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219 |
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1822
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220 if (! current_input_line.empty ()) |
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1
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221 { |
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1799
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222 if (! input_from_startup_file) |
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2927
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223 command_history::add (current_input_line); |
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1
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224 |
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3176
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225 if (! (reading_fcn_file || reading_script_file)) |
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226 { |
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227 octave_diary << current_input_line; |
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228 |
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229 if (current_input_line[current_input_line.length () - 1] != '\n') |
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230 octave_diary << "\n"; |
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231 } |
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581
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232 |
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1822
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233 do_input_echo (current_input_line); |
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1
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234 } |
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3176
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235 else if (! (reading_fcn_file || reading_script_file)) |
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236 octave_diary << "\n"; |
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581
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237 |
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1822
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238 return retval; |
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1
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239 } |
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240 |
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581
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241 // Read a line from the input stream. |
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242 |
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2927
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243 static string |
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1822
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244 get_user_input (void) |
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1
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245 { |
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2927
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246 string retval; |
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1
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247 |
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248 if (get_input_from_eval_string) |
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249 { |
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2927
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250 retval = current_eval_string; |
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1822
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251 |
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2927
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252 size_t len = retval.length (); |
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1822
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253 |
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2927
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254 if (retval[len-1] != '\n') |
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255 retval.append ("\n"); |
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1822
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256 } |
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257 else |
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258 retval = octave_gets (); |
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259 |
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2927
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260 current_input_line = retval; |
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1822
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261 |
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2114
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262 if (! get_input_from_eval_string) |
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263 input_line_number++; |
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1822
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264 |
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265 return retval; |
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266 } |
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267 |
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268 int |
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269 octave_read (char *buf, unsigned max_size) |
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270 { |
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2927
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271 // XXX FIXME XXX -- is this a safe way to buffer the input? |
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272 |
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273 static string input_buf; |
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274 static const char *pos = 0; |
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275 static size_t chars_left = 0; |
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1822
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276 |
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277 int status = 0; |
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278 |
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2927
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279 if (input_buf.empty ()) |
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1822
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280 { |
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2927
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281 pos = 0; |
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282 |
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283 input_buf = get_user_input (); |
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1822
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284 |
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2927
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285 chars_left = input_buf.length (); |
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286 |
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287 pos = input_buf.c_str (); |
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1822
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288 } |
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289 |
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290 if (chars_left > 0) |
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291 { |
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292 buf[0] = '\0'; |
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293 |
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2927
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294 size_t len = max_size > 2 ? max_size - 2 : 0; |
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1822
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295 |
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2927
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296 assert (len > 0); |
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297 |
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298 strncpy (buf, pos, len); |
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1822
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299 |
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300 if (chars_left > len) |
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1
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301 { |
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1822
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302 chars_left -= len; |
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303 |
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2927
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304 pos += len; |
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1822
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305 |
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306 buf[len] = '\0'; |
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307 |
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1
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308 status = len; |
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309 } |
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310 else |
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311 { |
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2927
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312 input_buf = ""; |
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1755
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313 |
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1822
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314 len = chars_left; |
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315 |
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316 if (buf[len-1] != '\n') |
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317 buf[len++] = '\n'; |
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1
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318 |
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1822
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319 buf[len] = '\0'; |
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1755
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320 |
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1822
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321 status = len; |
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1
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322 } |
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1044
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323 } |
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1822
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324 else if (chars_left == 0) |
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2862
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325 { |
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2927
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326 input_buf = ""; |
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2862
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327 |
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328 status = 0; |
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329 } |
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1822
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330 else |
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331 status = -1; |
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1044
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332 |
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1
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333 return status; |
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334 } |
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335 |
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581
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336 // Fix things up so that input can come from file `name', printing a |
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337 // warning if the file doesn't exist. |
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338 |
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1
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339 FILE * |
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1750
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340 get_input_from_file (const string& name, int warn) |
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1
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341 { |
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529
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342 FILE *instream = 0; |
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1
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343 |
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1750
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344 if (name.length () > 0) |
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345 instream = fopen (name.c_str (), "r"); |
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1
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346 |
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529
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347 if (! instream && warn) |
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1750
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348 warning ("%s: no such file or directory", name.c_str ()); |
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1
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349 |
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338
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350 if (reading_fcn_file || reading_script_file) |
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339
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351 ff_instream = instream; |
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1
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352 else |
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2927
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353 command_editor::set_input_stream (instream); |
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1
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354 |
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355 return instream; |
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356 } |
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357 |
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581
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358 // Fix things up so that input can come from the standard input. This |
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359 // may need to become much more complicated, which is why it's in a |
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360 // separate function. |
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361 |
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1
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362 FILE * |
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363 get_input_from_stdin (void) |
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364 { |
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2927
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365 command_editor::set_input_stream (stdin); |
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366 return command_editor::get_input_stream (); |
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1
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367 } |
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368 |
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2921
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369 // XXX FIXME XXX -- make this generate file names when appropriate. |
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370 |
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2247
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371 static string_vector |
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2921
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372 generate_possible_completions (const string& text, string& prefix, |
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373 string& hint) |
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1280
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374 { |
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2247
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375 string_vector names; |
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1280
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376 |
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2921
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377 prefix = ""; |
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1280
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378 |
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2921
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379 if (! text.empty () && text != "." && text.rfind ('.') != NPOS) |
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1430
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380 names = generate_struct_completions (text, prefix, hint); |
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381 else |
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2247
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382 names = make_name_list (); |
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1280
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383 |
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2944
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384 // Sort and remove duplicates. |
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2348
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385 |
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2944
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386 names.qsort (true); |
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2348
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387 |
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1280
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388 return names; |
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389 } |
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390 |
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2944
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391 static string |
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392 generate_completion (const string& text, int state) |
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1280
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393 { |
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2944
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394 string retval; |
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395 |
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2921
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396 static string prefix; |
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397 static string hint; |
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1280
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398 |
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2921
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399 static size_t prefix_len = 0; |
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400 static size_t hint_len = 0; |
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1280
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401 |
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1
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402 static int list_index = 0; |
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2921
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403 static int name_list_len = 0; |
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2247
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404 static string_vector name_list; |
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1
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405 |
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1280
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406 static int matches = 0; |
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1
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407 |
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408 if (state == 0) |
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409 { |
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410 list_index = 0; |
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411 |
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2921
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412 prefix = ""; |
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1280
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413 |
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2921
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414 hint = text; |
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1280
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415 |
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416 name_list = generate_possible_completions (text, prefix, hint); |
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417 |
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2921
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418 name_list_len = name_list.length (); |
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419 |
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420 prefix_len = prefix.length (); |
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1280
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421 |
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2921
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422 hint_len = hint.length (); |
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1280
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423 |
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424 matches = 0; |
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2247
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425 |
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2921
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426 for (int i = 0; i < name_list_len; i++) |
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427 if (! name_list[i].compare (hint, 0, hint_len)) |
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2247
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428 matches++; |
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1
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429 } |
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430 |
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2921
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431 if (name_list_len > 0 && matches > 0) |
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1
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432 { |
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2921
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433 while (list_index < name_list_len) |
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244
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434 { |
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2921
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435 string name = name_list[list_index]; |
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2247
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436 |
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1280
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437 list_index++; |
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2247
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438 |
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2921
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439 if (! name.compare (hint, 0, hint_len)) |
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1280
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440 { |
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2944
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441 if (! prefix.empty ()) |
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442 retval = prefix + "." + name; |
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443 else |
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444 retval = name; |
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1280
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445 |
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2944
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446 if (matches == 1 && looks_like_struct (retval)) |
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2927
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447 command_editor::set_completion_append_character ('.'); |
|
1280
|
448 else |
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2927
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449 command_editor::set_completion_append_character |
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450 (Vcompletion_append_char); |
|
1280
|
451 |
|
2944
|
452 break; |
|
1280
|
453 } |
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244
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454 } |
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1
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455 } |
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456 |
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2944
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457 return retval; |
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1
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458 } |
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459 |
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2927
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460 void |
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461 initialize_command_input (void) |
|
|
462 { |
|
|
463 // If we are using readline, this allows conditional parsing of the |
|
|
464 // .inputrc file. |
|
269
|
465 |
|
2927
|
466 command_editor::set_name ("Octave"); |
|
1358
|
467 |
|
3004
|
468 command_editor::set_basic_quote_characters ("\""); |
|
2944
|
469 |
|
|
470 command_editor::set_completion_function (generate_completion); |
|
269
|
471 } |
|
|
472 |
|
2927
|
473 static bool |
|
|
474 match_sans_spaces (const string& standard, const string& test) |
|
269
|
475 { |
|
2927
|
476 string tmp = test; |
|
269
|
477 |
|
2927
|
478 size_t beg = test.find_first_not_of (" \t"); |
|
|
479 size_t end = test.find_last_not_of (" \t"); |
|
|
480 size_t len = beg - end + 1; |
|
1
|
481 |
|
2927
|
482 return test.compare (standard, beg, len) == 0; |
|
529
|
483 } |
|
|
484 |
|
581
|
485 // If the user simply hits return, this will produce an empty matrix. |
|
|
486 |
|
2086
|
487 static octave_value_list |
|
3100
|
488 get_user_input (const octave_value_list& args, bool debug, int nargout) |
|
529
|
489 { |
|
3100
|
490 octave_value_list retval; |
|
529
|
491 |
|
|
492 int nargin = args.length (); |
|
|
493 |
|
|
494 int read_as_string = 0; |
|
|
495 |
|
712
|
496 if (nargin == 2) |
|
529
|
497 read_as_string++; |
|
|
498 |
|
1761
|
499 string prompt ("debug> "); |
|
|
500 |
|
712
|
501 if (nargin > 0) |
|
529
|
502 { |
|
1761
|
503 prompt = args(0).string_value (); |
|
636
|
504 |
|
|
505 if (error_state) |
|
|
506 { |
|
|
507 error ("input: unrecognized argument"); |
|
|
508 return retval; |
|
|
509 } |
|
529
|
510 } |
|
|
511 |
|
|
512 again: |
|
|
513 |
|
2095
|
514 flush_octave_stdout (); |
|
529
|
515 |
|
2927
|
516 string input_buf = gnu_readline (prompt.c_str (), true); |
|
529
|
517 |
|
2927
|
518 if (! input_buf.empty ()) |
|
529
|
519 { |
|
1799
|
520 if (! input_from_startup_file) |
|
2927
|
521 command_history::add (input_buf); |
|
529
|
522 |
|
2927
|
523 size_t len = input_buf.length (); |
|
529
|
524 |
|
|
525 if (len < 1) |
|
|
526 { |
|
|
527 if (debug) |
|
|
528 goto again; |
|
|
529 else |
|
963
|
530 { |
|
|
531 if (read_as_string) |
|
|
532 return ""; |
|
|
533 else |
|
|
534 return Matrix (); |
|
|
535 } |
|
529
|
536 } |
|
|
537 |
|
|
538 if (match_sans_spaces ("exit", input_buf) |
|
|
539 || match_sans_spaces ("quit", input_buf) |
|
|
540 || match_sans_spaces ("return", input_buf)) |
|
963
|
541 { |
|
|
542 return retval; |
|
|
543 } |
|
529
|
544 else if (read_as_string) |
|
963
|
545 { |
|
3081
|
546 // XXX FIXME XXX -- fix gnu_readline and octave_gets instead! |
|
|
547 if (input_buf.length () == 1 && input_buf[0] == '\n') |
|
3100
|
548 retval(0) = ""; |
|
3081
|
549 else |
|
3100
|
550 retval(0) = input_buf; |
|
963
|
551 } |
|
529
|
552 else |
|
|
553 { |
|
|
554 int parse_status = 0; |
|
2900
|
555 |
|
3100
|
556 bool silent = ! debug; |
|
2900
|
557 |
|
3100
|
558 retval = eval_string (input_buf, silent, parse_status, nargout); |
|
|
559 |
|
|
560 if (! debug && retval.length == 0) |
|
|
561 retval(0) = Matrix (); |
|
529
|
562 } |
|
|
563 } |
|
|
564 else |
|
|
565 error ("input: reading user-input failed!"); |
|
|
566 |
|
|
567 if (debug) |
|
3098
|
568 { |
|
|
569 // Clear error_state so that if errors were encountered while |
|
|
570 // evaluating user input, extra error messages will not be |
|
|
571 // printed after we return. |
|
|
572 |
|
|
573 error_state = 0; |
|
|
574 |
|
3100
|
575 retval = octave_value_list (); |
|
3098
|
576 |
|
|
577 goto again; |
|
|
578 } |
|
529
|
579 |
|
|
580 return retval; |
|
|
581 } |
|
|
582 |
|
3100
|
583 DEFUN (input, args, nargout, |
|
529
|
584 "input (PROMPT [, S])\n\ |
|
|
585 \n\ |
|
2802
|
586 Prompt user for input. If the second argument is present, return\n\ |
|
529
|
587 value as a string.") |
|
|
588 { |
|
2086
|
589 octave_value_list retval; |
|
529
|
590 |
|
|
591 int nargin = args.length (); |
|
|
592 |
|
712
|
593 if (nargin == 1 || nargin == 2) |
|
3100
|
594 retval = get_user_input (args, false, nargout); |
|
529
|
595 else |
|
|
596 print_usage ("input"); |
|
|
597 |
|
|
598 return retval; |
|
|
599 } |
|
|
600 |
|
3098
|
601 static void |
|
|
602 restore_command_history (void *) |
|
|
603 { |
|
|
604 command_history::ignore_entries (! Vsaving_history); |
|
|
605 } |
|
|
606 |
|
1957
|
607 DEFUN (keyboard, args, , |
|
529
|
608 "keyboard (PROMPT)\n\ |
|
|
609 \n\ |
|
|
610 maybe help in debugging function files") |
|
|
611 { |
|
2086
|
612 octave_value_list retval; |
|
529
|
613 |
|
|
614 int nargin = args.length (); |
|
|
615 |
|
712
|
616 if (nargin == 0 || nargin == 1) |
|
3098
|
617 { |
|
|
618 unwind_protect::begin_frame ("keyboard"); |
|
|
619 |
|
|
620 // XXX FIXME XXX -- we shouldn't need both the |
|
|
621 // command_history object and the |
|
|
622 // Vsaving_history variable... |
|
|
623 command_history::ignore_entries (false); |
|
|
624 |
|
|
625 unwind_protect::add (restore_command_history, 0); |
|
|
626 |
|
|
627 unwind_protect_bool (Vsaving_history); |
|
|
628 |
|
|
629 Vsaving_history = true; |
|
|
630 |
|
3100
|
631 retval = get_user_input (args, true, 0); |
|
3098
|
632 |
|
|
633 unwind_protect::run_frame ("keyboard"); |
|
|
634 } |
|
529
|
635 else |
|
|
636 print_usage ("keyboard"); |
|
|
637 |
|
|
638 return retval; |
|
|
639 } |
|
|
640 |
|
1957
|
641 DEFUN_TEXT(echo, args, , |
|
1588
|
642 "echo [options]\n\ |
|
|
643 \n\ |
|
|
644 echo [on|off] -- enable or disable echoing of commands as\n\ |
|
|
645 they are executed in script files\n\ |
|
|
646 \n\ |
|
|
647 echo [on all|off all] -- enable or disable echoing of commands as they\n\ |
|
|
648 are executed in script files and functions\n\ |
|
|
649 \n\ |
|
|
650 Without any arguments, toggle the current echo state.") |
|
|
651 { |
|
2086
|
652 octave_value_list retval; |
|
1588
|
653 |
|
1755
|
654 int argc = args.length () + 1; |
|
|
655 |
|
1968
|
656 string_vector argv = args.make_argv ("echo"); |
|
1755
|
657 |
|
|
658 if (error_state) |
|
|
659 return retval; |
|
1588
|
660 |
|
|
661 switch (argc) |
|
|
662 { |
|
|
663 case 1: |
|
|
664 { |
|
2205
|
665 if ((Vecho_executing_commands & ECHO_SCRIPTS) |
|
|
666 || (Vecho_executing_commands & ECHO_FUNCTIONS)) |
|
2431
|
667 bind_builtin_variable ("echo_executing_commands", |
|
2800
|
668 static_cast<double> (ECHO_OFF)); |
|
1588
|
669 else |
|
2431
|
670 bind_builtin_variable ("echo_executing_commands", |
|
2800
|
671 static_cast<double> (ECHO_SCRIPTS)); |
|
1588
|
672 } |
|
|
673 break; |
|
|
674 |
|
|
675 case 2: |
|
|
676 { |
|
1755
|
677 string arg = argv[1]; |
|
|
678 |
|
|
679 if (arg == "on") |
|
2431
|
680 bind_builtin_variable ("echo_executing_commands", |
|
2800
|
681 static_cast<double> (ECHO_SCRIPTS)); |
|
1755
|
682 else if (arg == "off") |
|
2431
|
683 bind_builtin_variable ("echo_executing_commands", |
|
2800
|
684 static_cast<double> (ECHO_OFF)); |
|
1588
|
685 else |
|
|
686 print_usage ("echo"); |
|
|
687 } |
|
|
688 break; |
|
|
689 |
|
|
690 case 3: |
|
|
691 { |
|
1755
|
692 string arg = argv[1]; |
|
|
693 |
|
|
694 if (arg == "on" && argv[2] == "all") |
|
2800
|
695 { |
|
|
696 int tmp = (ECHO_SCRIPTS | ECHO_FUNCTIONS); |
|
|
697 bind_builtin_variable ("echo_executing_commands", |
|
|
698 static_cast<double> (tmp)); |
|
|
699 } |
|
1755
|
700 else if (arg == "off" && argv[2] == "all") |
|
2431
|
701 bind_builtin_variable ("echo_executing_commands", |
|
2800
|
702 static_cast<double> (ECHO_OFF)); |
|
1588
|
703 else |
|
|
704 print_usage ("echo"); |
|
|
705 } |
|
|
706 break; |
|
|
707 |
|
|
708 default: |
|
|
709 print_usage ("echo"); |
|
|
710 break; |
|
|
711 } |
|
|
712 |
|
|
713 return retval; |
|
|
714 } |
|
|
715 |
|
2234
|
716 DEFUN (completion_matches, args, nargout, |
|
2299
|
717 "completion_matches (HINT): generate possible completions given HINT\n\ |
|
|
718 \n\ |
|
|
719 This function is provided for the benefit of programs like Emacs which\n\ |
|
|
720 might be controlling Octave and handling user input. The current command\n\ |
|
|
721 number is not incremented when this function is called. This is a feature,\n\ |
|
|
722 not a bug.") |
|
2234
|
723 { |
|
2281
|
724 octave_value retval; |
|
2234
|
725 |
|
|
726 int nargin = args.length (); |
|
|
727 |
|
|
728 if (nargin == 1) |
|
|
729 { |
|
2944
|
730 string hint = args(0).string_value (); |
|
2234
|
731 |
|
|
732 if (! error_state) |
|
|
733 { |
|
|
734 int n = 32; |
|
|
735 |
|
|
736 string_vector list (n); |
|
|
737 |
|
|
738 int k = 0; |
|
|
739 |
|
|
740 for (;;) |
|
|
741 { |
|
2944
|
742 string cmd = generate_completion (hint, k); |
|
2234
|
743 |
|
2944
|
744 if (! cmd.empty ()) |
|
2234
|
745 { |
|
2944
|
746 if (k == n) |
|
2234
|
747 { |
|
2944
|
748 n *= 2; |
|
|
749 list.resize (n); |
|
|
750 } |
|
2235
|
751 |
|
2944
|
752 list[k++] = cmd; |
|
2234
|
753 } |
|
|
754 else |
|
|
755 { |
|
|
756 list.resize (k); |
|
|
757 break; |
|
|
758 } |
|
|
759 } |
|
|
760 |
|
|
761 if (nargout > 0) |
|
2281
|
762 { |
|
|
763 if (! list.empty ()) |
|
|
764 retval = list; |
|
2282
|
765 else |
|
|
766 retval = ""; |
|
2281
|
767 } |
|
2234
|
768 else |
|
|
769 { |
|
2235
|
770 // We don't use string_vector::list_in_columns here |
|
|
771 // because it will be easier for Emacs if the names |
|
|
772 // appear in a single column. |
|
|
773 |
|
2234
|
774 int len = list.length (); |
|
|
775 |
|
|
776 for (int i = 0; i < len; i++) |
|
|
777 octave_stdout << list[i] << "\n"; |
|
|
778 } |
|
2299
|
779 |
|
|
780 octave_completion_matches_called = true; |
|
2234
|
781 } |
|
|
782 } |
|
|
783 else |
|
|
784 print_usage ("completion_matches"); |
|
|
785 |
|
|
786 return retval; |
|
|
787 } |
|
|
788 |
|
2181
|
789 static int |
|
|
790 ps1 (void) |
|
|
791 { |
|
|
792 int status = 0; |
|
|
793 |
|
|
794 Vps1 = builtin_string_variable ("PS1"); |
|
|
795 |
|
|
796 return status; |
|
|
797 } |
|
|
798 |
|
|
799 static int |
|
|
800 ps2 (void) |
|
|
801 { |
|
|
802 int status = 0; |
|
|
803 |
|
|
804 Vps2 = builtin_string_variable ("PS2"); |
|
|
805 |
|
|
806 return status; |
|
|
807 } |
|
|
808 |
|
|
809 static int |
|
|
810 ps4 (void) |
|
|
811 { |
|
|
812 int status = 0; |
|
|
813 |
|
|
814 Vps4 = builtin_string_variable ("PS4"); |
|
|
815 |
|
|
816 return status; |
|
|
817 } |
|
|
818 |
|
|
819 static int |
|
|
820 completion_append_char (void) |
|
|
821 { |
|
|
822 int status = 0; |
|
|
823 |
|
|
824 string s = builtin_string_variable ("completion_append_char"); |
|
|
825 |
|
|
826 switch (s.length ()) |
|
|
827 { |
|
|
828 case 1: |
|
|
829 Vcompletion_append_char = s[0]; |
|
|
830 break; |
|
|
831 |
|
|
832 case 0: |
|
|
833 Vcompletion_append_char = '\0'; |
|
|
834 break; |
|
|
835 |
|
|
836 default: |
|
|
837 warning ("completion_append_char must be a single character"); |
|
|
838 status = -1; |
|
|
839 break; |
|
|
840 } |
|
|
841 |
|
|
842 return status; |
|
|
843 } |
|
|
844 |
|
3019
|
845 static int |
|
|
846 echo_executing_commands (void) |
|
|
847 { |
|
|
848 Vecho_executing_commands = check_preference ("echo_executing_commands"); |
|
|
849 |
|
|
850 return 0; |
|
|
851 } |
|
|
852 |
|
2181
|
853 void |
|
|
854 symbols_of_input (void) |
|
|
855 { |
|
|
856 DEFVAR (PS1, "\\s:\\#> ", 0, ps1, |
|
|
857 "primary prompt string"); |
|
|
858 |
|
|
859 DEFVAR (PS2, "> ", 0, ps2, |
|
|
860 "secondary prompt string"); |
|
|
861 |
|
|
862 DEFVAR (PS4, "+ ", 0, ps4, |
|
|
863 "string printed before echoed input (enabled by --echo-input)"); |
|
|
864 |
|
|
865 DEFVAR (completion_append_char, " ", 0, completion_append_char, |
|
|
866 "the string to append after successful command-line completion attempts"); |
|
3019
|
867 |
|
|
868 DEFVAR (echo_executing_commands, static_cast<double> (ECHO_OFF), 0, |
|
|
869 echo_executing_commands, |
|
|
870 "echo commands as they are executed"); |
|
2181
|
871 } |
|
|
872 |
|
1
|
873 /* |
|
|
874 ;;; Local Variables: *** |
|
|
875 ;;; mode: C++ *** |
|
|
876 ;;; End: *** |
|
|
877 */ |
