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1
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1 // input.cc -*- C++ -*- |
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2 /* |
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3 |
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269
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4 Copyright (C) 1992, 1993, 1994 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
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21 |
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22 */ |
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23 |
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661
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24 /* |
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25 |
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26 The 3 functions listed below were adapted from similar functions |
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27 from GNU Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 |
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28 Free Software Foundation, Inc. |
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29 |
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30 read_octal sub_append_string decode_prompt_string |
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31 |
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32 */ |
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33 |
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1
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34 // Use the GNU readline library for command line editing and hisory. |
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35 |
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240
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36 #ifdef HAVE_CONFIG_H |
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37 #include "config.h" |
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1
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38 #endif |
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39 |
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529
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40 #include <sys/types.h> |
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41 #ifdef HAVE_UNISTD_H |
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42 #include <unistd.h> |
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43 #endif |
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44 #include <time.h> |
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1
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45 #include <stdio.h> |
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46 #include <stdlib.h> |
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195
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47 #include <iostream.h> |
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188
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48 #include <string.h> |
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1
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49 #include <assert.h> |
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836
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50 #include <signal.h> |
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1
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51 |
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52 // This must come before anything that includes iostream.h... |
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53 extern "C" |
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54 { |
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55 #include "readline/readline.h" |
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269
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56 #include "readline/history.h" |
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1
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57 |
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271
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58 extern void free_undo_list (); |
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59 |
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252
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60 extern char *xmalloc (); |
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61 |
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581
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62 // Yes, this sucks, but it avoids a conflict with another readline |
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63 // function declared in iostream.h. |
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64 |
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1
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65 #if 0 |
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66 #define LINE_SIZE 8192 |
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529
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67 static int no_line_editing = 0; |
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1
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68 #endif |
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69 |
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70 char * |
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71 gnu_readline (char *s) |
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72 { |
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73 #if 0 |
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74 static int state = 0; |
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529
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75 static char *line_from_stdin = 0; |
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1
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76 if (no_line_editing) |
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77 { |
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78 if (! state) |
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79 { |
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80 line_from_stdin = (char *) malloc (LINE_SIZE); |
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81 state = 1; |
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82 } |
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83 fputs ("octave> ", stdout); |
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84 fgets (line_from_stdin, LINE_SIZE, stdin); |
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85 return line_from_stdin; |
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86 } |
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87 else |
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88 #endif |
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89 return readline (s); |
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90 } |
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91 } |
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92 |
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529
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93 #include "help.h" |
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1
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94 #include "error.h" |
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95 #include "utils.h" |
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96 #include "input.h" |
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97 #include "pager.h" |
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529
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98 #include "parse.h" |
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99 #include "dirfns.h" |
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100 #include "octave.h" |
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101 #include "variables.h" |
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102 #include "tree-const.h" |
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1
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103 #include "octave-hist.h" |
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104 #include "sighandlers.h" |
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105 #include "user-prefs.h" |
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529
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106 #include "oct-obj.h" |
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107 #include "defun.h" |
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108 |
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109 #ifndef MAXPATHLEN |
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110 #define MAXPATHLEN 1024 |
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111 #endif |
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112 |
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113 // The size that strings change by. |
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114 #ifndef DEFAULT_ARRAY_SIZE |
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115 #define DEFAULT_ARRAY_SIZE 512 |
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116 #endif |
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117 |
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118 // The growth rate for the prompt string. |
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119 #ifndef PROMPT_GROWTH |
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120 #define PROMPT_GROWTH 50 |
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121 #endif |
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1
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122 |
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123 // Global pointer for eval(). |
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529
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124 const char *current_eval_string = 0; |
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125 |
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126 // Nonzero means get input from current_eval_string. |
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127 int get_input_from_eval_string = 0; |
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128 |
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338
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129 // Nonzero means we're parsing a function file. |
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130 int reading_fcn_file = 0; |
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1
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131 |
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338
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132 // Simple name of function file we are reading. |
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529
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133 char *curr_fcn_file_name = 0; |
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1
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134 |
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135 // Nonzero means we're parsing a script file. |
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136 int reading_script_file = 0; |
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137 |
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138 // If we are reading from an M-file, this is it. |
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529
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139 FILE *ff_instream = 0; |
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1
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140 |
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141 // Nonzero means we are using readline. |
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142 int using_readline = 1; |
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143 |
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616
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144 // Nonzero means commands are echoed as they are executed. |
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145 // (--echo-commands; -x). |
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1
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146 int echo_input = 0; |
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147 |
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148 // Nonzero means this is an interactive shell. |
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149 int interactive = 0; |
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150 |
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151 // Nonzero means the user forced this shell to be interactive (-i). |
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152 int forced_interactive = 0; |
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153 |
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154 // Should we issue a prompt? |
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155 int promptflag = 1; |
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156 |
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157 // The current line of input, from wherever. |
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529
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158 char *current_input_line = 0; |
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1
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159 |
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160 // A line of input from readline. |
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529
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161 static char *octave_gets_line = 0; |
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162 |
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163 extern tree_constant eval_string (const char *string, int print, |
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164 int ans_assign, int& parse_status); |
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165 |
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581
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166 // Append SOURCE to TARGET at INDEX. SIZE is the current amount of |
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167 // space allocated to TARGET. SOURCE can be NULL, in which case |
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168 // nothing happens. Gets rid of SOURCE by free ()ing it. Returns |
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169 // TARGET in case the location has changed. |
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170 |
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529
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171 static char * |
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172 sub_append_string (char *source, char *target, int *index, int *size) |
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173 { |
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174 if (source) |
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175 { |
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176 while ((int)strlen (source) >= (int)(*size - *index)) |
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177 { |
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178 char *tmp = new char [*size += DEFAULT_ARRAY_SIZE]; |
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179 strcpy (tmp, target); |
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180 delete [] target; |
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181 target = tmp; |
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182 } |
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183 |
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184 strcat (target, source); |
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185 *index += strlen (source); |
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186 |
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187 delete [] source; |
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188 } |
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189 return target; |
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190 } |
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191 |
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581
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192 // Return the octal number parsed from STRING, or -1 to indicate that |
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193 // the string contained a bad number. |
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194 |
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529
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195 int |
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196 read_octal (const char *string) |
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197 { |
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198 int result = 0; |
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199 int digits = 0; |
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200 |
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201 while (*string && *string >= '0' && *string < '8') |
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202 { |
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203 digits++; |
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204 result = (result * 8) + *string++ - '0'; |
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205 } |
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206 |
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207 if (! digits || result > 0777 || *string) |
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208 result = -1; |
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209 |
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210 return result; |
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211 } |
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212 |
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581
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213 // Return a string which will be printed as a prompt. The string may |
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214 // contain special characters which are decoded as follows: |
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215 // |
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216 // \t the time |
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217 // \d the date |
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218 // \n CRLF |
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219 // \s the name of the shell (program) |
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220 // \w the current working directory |
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221 // \W the last element of PWD |
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222 // \u your username |
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223 // \h the hostname |
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224 // \# the command number of this command |
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225 // \! the history number of this command |
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226 // \$ a $ or a # if you are root |
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227 // \<octal> character code in octal |
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228 // \\ a backslash |
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229 |
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529
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230 static char * |
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231 decode_prompt_string (const char *string) |
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232 { |
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233 int result_size = PROMPT_GROWTH; |
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234 int result_index = 0; |
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235 char *result = new char [PROMPT_GROWTH]; |
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236 int c; |
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237 char *temp = 0; |
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238 |
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239 result[0] = 0; |
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240 while (c = *string++) |
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241 { |
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242 if (c == '\\') |
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243 { |
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244 c = *string; |
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245 |
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246 switch (c) |
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247 { |
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248 case '0': |
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249 case '1': |
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250 case '2': |
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251 case '3': |
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252 case '4': |
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253 case '5': |
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254 case '6': |
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255 case '7': |
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256 { |
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257 char octal_string[4]; |
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258 int n; |
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259 |
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260 strncpy (octal_string, string, 3); |
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261 octal_string[3] = '\0'; |
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262 |
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263 n = read_octal (octal_string); |
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264 |
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265 temp = strsave ("\\"); |
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266 if (n != -1) |
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267 { |
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268 string += 3; |
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269 temp[0] = n; |
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270 } |
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271 |
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272 c = 0; |
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273 goto add_string; |
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274 } |
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275 |
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276 case 't': |
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277 case 'd': |
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278 /* Make the current time/date into a string. */ |
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279 { |
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280 time_t the_time = time (0); |
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281 char *ttemp = ctime (&the_time); |
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282 temp = strsave (ttemp); |
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283 |
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284 if (c == 't') |
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285 { |
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286 strcpy (temp, temp + 11); |
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287 temp[8] = '\0'; |
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288 } |
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289 else |
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290 temp[10] = '\0'; |
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291 |
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292 goto add_string; |
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293 } |
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1
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294 |
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529
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295 case 'n': |
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296 if (! no_line_editing) |
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297 temp = strsave ("\r\n"); |
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298 else |
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299 temp = strsave ("\n"); |
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300 goto add_string; |
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301 |
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302 case 's': |
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303 { |
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304 temp = base_pathname (prog_name); |
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305 temp = strsave (temp); |
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306 goto add_string; |
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307 } |
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308 |
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309 case 'w': |
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310 case 'W': |
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311 { |
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312 char t_string[MAXPATHLEN]; |
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313 #define EFFICIENT |
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314 #ifdef EFFICIENT |
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315 |
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316 // Use the value of PWD because it is much more effecient. |
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317 |
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318 temp = user_pref.pwd; |
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319 |
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320 if (! temp) |
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321 getcwd (t_string, MAXPATHLEN); |
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322 else |
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323 strcpy (t_string, temp); |
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324 #else |
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325 getcwd (t_string, MAXPATHLEN); |
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326 #endif /* EFFICIENT */ |
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327 |
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328 if (c == 'W') |
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329 { |
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330 char *dir = strrchr (t_string, '/'); |
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331 if (dir && dir != t_string) |
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332 strcpy (t_string, dir + 1); |
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333 temp = strsave (t_string); |
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334 } |
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335 else |
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336 temp = strsave (polite_directory_format (t_string)); |
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337 goto add_string; |
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338 } |
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339 |
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340 case 'u': |
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341 { |
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342 temp = strsave (user_name); |
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343 |
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344 goto add_string; |
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345 } |
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346 |
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347 case 'h': |
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348 { |
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349 char *t_string; |
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350 |
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351 temp = strsave (host_name); |
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352 if (t_string = strchr (temp, '.')) |
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353 *t_string = '\0'; |
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354 |
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355 goto add_string; |
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356 } |
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357 |
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358 case '#': |
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359 { |
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360 char number_buffer[128]; |
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361 sprintf (number_buffer, "%d", current_command_number); |
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362 temp = strsave (number_buffer); |
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363 goto add_string; |
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364 } |
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365 |
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366 case '!': |
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367 { |
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368 char number_buffer[128]; |
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369 int num = current_history_number (); |
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370 if (num > 0) |
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371 sprintf (number_buffer, "%d", num); |
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372 else |
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373 strcpy (number_buffer, "!"); |
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374 temp = strsave (number_buffer); |
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375 goto add_string; |
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376 } |
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377 |
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378 case '$': |
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379 temp = strsave (geteuid () == 0 ? "#" : "$"); |
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380 goto add_string; |
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381 |
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382 case '\\': |
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383 temp = strsave ("\\"); |
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384 goto add_string; |
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385 |
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386 default: |
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387 temp = strsave ("\\ "); |
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388 temp[1] = c; |
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389 |
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390 add_string: |
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391 if (c) |
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392 string++; |
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393 result = |
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394 (char *)sub_append_string (temp, result, |
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395 &result_index, &result_size); |
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581
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396 temp = 0; // Free ()'ed in sub_append_string (). |
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529
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397 result[result_index] = '\0'; |
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398 break; |
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399 } |
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400 } |
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401 else |
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402 { |
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403 while (3 + result_index > result_size) |
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404 { |
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405 char *tmp = new char [result_size += PROMPT_GROWTH]; |
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406 strcpy (tmp, result); |
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407 delete [] result; |
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408 result = tmp; |
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409 } |
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410 result[result_index++] = c; |
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411 result[result_index] = '\0'; |
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412 } |
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413 } |
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414 |
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415 #if 0 |
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581
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416 // I don't really think that this is a good idea. Do you? |
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529
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417 if (! find_variable ("NO_PROMPT_VARS")) |
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418 { |
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419 WORD_LIST *expand_string (), *list; |
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420 char *string_list (); |
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421 |
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422 list = expand_string (result, 1); |
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423 free (result); |
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424 result = string_list (list); |
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425 dispose_words (list); |
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426 } |
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427 #endif |
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428 |
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429 return result; |
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430 } |
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581
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431 |
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432 // Use GNU readline to get an input line and store it in the history |
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433 // list. |
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434 |
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287
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435 static char * |
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1
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436 octave_gets (void) |
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437 { |
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529
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438 if (octave_gets_line) |
|
126
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439 { |
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440 free (octave_gets_line); |
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529
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441 octave_gets_line = 0; |
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126
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442 } |
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1
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443 |
|
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444 if (interactive || forced_interactive) |
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445 { |
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446 char *ps = (promptflag > 0) ? user_pref.ps1 : user_pref.ps2; |
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447 char *prompt = decode_prompt_string (ps); |
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448 |
|
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449 if (interactive) |
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450 { |
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451 pipe_handler_error_count = 0; |
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452 flush_output_to_pager (); |
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453 } |
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454 |
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581
|
455 maybe_write_to_diary_file (prompt); |
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|
456 |
|
1
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457 octave_gets_line = gnu_readline (prompt); |
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581
|
458 |
|
1
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459 delete [] prompt; |
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|
460 } |
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461 else |
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462 octave_gets_line = gnu_readline (""); |
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463 |
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464 current_input_line = octave_gets_line; |
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465 |
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466 if (octave_gets_line && *octave_gets_line) |
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467 { |
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468 maybe_save_history (octave_gets_line); |
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469 |
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581
|
470 maybe_write_to_diary_file (octave_gets_line); |
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|
471 |
|
1
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472 if (echo_input) |
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|
473 { |
|
287
|
474 if (! forced_interactive) |
|
1
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475 cout << "+ "; |
|
287
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476 |
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|
477 cout << octave_gets_line << "\n"; |
|
1
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478 } |
|
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479 } |
|
581
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480 |
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481 maybe_write_to_diary_file ("\n"); |
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482 |
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1
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483 return octave_gets_line; |
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|
484 } |
|
|
485 |
|
581
|
486 // Read a line from the input stream. |
|
|
487 |
|
269
|
488 int |
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1
|
489 octave_read (char *buf, int max_size) |
|
|
490 { |
|
|
491 int status = 0; |
|
|
492 |
|
529
|
493 static char *stashed_line = 0; |
|
1
|
494 |
|
|
495 if (get_input_from_eval_string) |
|
|
496 { |
|
|
497 int len = strlen (current_eval_string); |
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|
498 if (len < max_size - 1) |
|
|
499 { |
|
|
500 strcpy (buf, current_eval_string); |
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|
501 buf[len++] = '\n'; |
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|
502 buf[len] = '\0'; // Paranoia. |
|
|
503 status = len; |
|
|
504 } |
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|
505 else |
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|
506 status = -1; |
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|
507 |
|
|
508 if (stashed_line) |
|
|
509 delete [] stashed_line; |
|
|
510 |
|
|
511 stashed_line = strsave (buf); |
|
|
512 current_input_line = stashed_line; |
|
|
513 } |
|
|
514 else if (using_readline) |
|
|
515 { |
|
|
516 char *cp = octave_gets (); |
|
529
|
517 if (cp) |
|
1
|
518 { |
|
|
519 int len = strlen (cp); |
|
|
520 if (len >= max_size) |
|
|
521 status = -1; |
|
|
522 else |
|
|
523 { |
|
|
524 strcpy (buf, cp); |
|
|
525 buf[len++] = '\n'; |
|
|
526 buf[len] = '\0'; // Paranoia. |
|
|
527 status = len; |
|
|
528 } |
|
|
529 } |
|
|
530 current_input_line = cp; |
|
|
531 } |
|
|
532 else |
|
|
533 { |
|
|
534 FILE *curr_stream = rl_instream; |
|
338
|
535 if (reading_fcn_file || reading_script_file) |
|
339
|
536 curr_stream = ff_instream; |
|
1
|
537 |
|
529
|
538 assert (curr_stream); |
|
1
|
539 |
|
|
540 // Why is this required? |
|
|
541 buf[0] = '\0'; |
|
|
542 |
|
529
|
543 if (fgets (buf, max_size, curr_stream)) |
|
1
|
544 { |
|
|
545 int len = strlen (buf); |
|
|
546 if (len > max_size - 2) |
|
|
547 status = -1; |
|
|
548 else |
|
|
549 { |
|
|
550 if (buf[len-1] != '\n') |
|
|
551 { |
|
|
552 buf[len++] = '\n'; |
|
|
553 buf[len] = '\0'; |
|
|
554 } |
|
|
555 status = len; |
|
|
556 } |
|
|
557 } |
|
|
558 else |
|
|
559 status = 0; // Tell yylex that we found EOF. |
|
|
560 |
|
|
561 if (stashed_line) |
|
|
562 delete [] stashed_line; |
|
|
563 |
|
|
564 stashed_line = strsave (buf); |
|
|
565 current_input_line = stashed_line; |
|
287
|
566 |
|
|
567 if (echo_input && current_input_line && *current_input_line) |
|
|
568 { |
|
|
569 if (! forced_interactive) |
|
|
570 cout << "+ "; |
|
|
571 |
|
|
572 cout << current_input_line << "\n"; |
|
|
573 } |
|
1
|
574 } |
|
|
575 input_line_number++; |
|
|
576 return status; |
|
|
577 } |
|
|
578 |
|
581
|
579 // Fix things up so that input can come from file `name', printing a |
|
|
580 // warning if the file doesn't exist. |
|
|
581 |
|
1
|
582 FILE * |
|
529
|
583 get_input_from_file (char *name, int warn) |
|
1
|
584 { |
|
529
|
585 FILE *instream = 0; |
|
1
|
586 |
|
|
587 if (name && *name) |
|
|
588 instream = fopen (name, "r"); |
|
|
589 |
|
529
|
590 if (! instream && warn) |
|
217
|
591 warning ("%s: no such file or directory", name); |
|
1
|
592 |
|
338
|
593 if (reading_fcn_file || reading_script_file) |
|
339
|
594 ff_instream = instream; |
|
1
|
595 else |
|
|
596 rl_instream = instream; |
|
|
597 |
|
|
598 return instream; |
|
|
599 } |
|
|
600 |
|
581
|
601 // Fix things up so that input can come from the standard input. This |
|
|
602 // may need to become much more complicated, which is why it's in a |
|
|
603 // separate function. |
|
|
604 |
|
1
|
605 FILE * |
|
|
606 get_input_from_stdin (void) |
|
|
607 { |
|
|
608 rl_instream = stdin; |
|
|
609 return rl_instream; |
|
|
610 } |
|
|
611 |
|
269
|
612 static char * |
|
1
|
613 command_generator (char *text, int state) |
|
|
614 { |
|
|
615 static int len = 0; |
|
|
616 static int list_index = 0; |
|
|
617 |
|
529
|
618 static char **name_list = 0; |
|
1
|
619 |
|
|
620 if (state == 0) |
|
|
621 { |
|
|
622 list_index = 0; |
|
|
623 len = strlen (text); |
|
|
624 |
|
529
|
625 if (name_list) |
|
244
|
626 { |
|
|
627 char **ptr = name_list; |
|
|
628 while (ptr && *ptr) |
|
|
629 delete [] *ptr++; |
|
|
630 delete [] name_list; |
|
|
631 } |
|
1
|
632 |
|
|
633 name_list = make_name_list (); |
|
|
634 } |
|
|
635 |
|
|
636 char *name; |
|
529
|
637 while ((name = name_list[list_index]) != 0) |
|
1
|
638 { |
|
|
639 list_index++; |
|
|
640 if (strncmp (name, text, len) == 0) |
|
244
|
641 { |
|
|
642 char *buf = xmalloc (1 + strlen (name)); |
|
|
643 strcpy (buf, name); |
|
|
644 return buf; |
|
|
645 } |
|
1
|
646 } |
|
|
647 |
|
529
|
648 return 0; |
|
1
|
649 } |
|
|
650 |
|
269
|
651 static char ** |
|
1
|
652 command_completer (char *text, int start, int end) |
|
|
653 { |
|
529
|
654 char **matches = 0; |
|
1
|
655 matches = completion_matches (text, command_generator); |
|
|
656 return matches; |
|
|
657 } |
|
|
658 |
|
581
|
659 // The next two functions implement the equivalent of the K*rn shell |
|
|
660 // C-o operate-and-get-next-history-line editing command. Stolen from |
|
|
661 // the GNU Bourne Again SHell. |
|
269
|
662 |
|
|
663 // ?? |
|
|
664 static int saved_history_line_to_use = 0; |
|
|
665 |
|
|
666 // ?? |
|
529
|
667 static Function *old_rl_startup_hook = 0; |
|
269
|
668 |
|
|
669 static void |
|
|
670 set_saved_history (void) |
|
|
671 { |
|
|
672 HIST_ENTRY *h; |
|
|
673 |
|
|
674 if (saved_history_line_to_use) |
|
|
675 { |
|
|
676 if (history_set_pos (saved_history_line_to_use)) |
|
|
677 { |
|
|
678 h = current_history (); |
|
|
679 if (h) |
|
|
680 { |
|
|
681 rl_insert_text (h->line); |
|
|
682 |
|
|
683 // Get rid of any undo list created by the previous insert, so the |
|
|
684 // line won't totally be erased when the edits are undone (they will |
|
|
685 // be normally, because this is a history line -- cf. readline.c: |
|
|
686 // line 380 or so). |
|
|
687 if (rl_undo_list) |
|
|
688 { |
|
|
689 free_undo_list (); |
|
529
|
690 rl_undo_list = 0; |
|
269
|
691 } |
|
|
692 } |
|
|
693 } |
|
|
694 } |
|
|
695 saved_history_line_to_use = 0; |
|
|
696 rl_startup_hook = old_rl_startup_hook; |
|
|
697 } |
|
|
698 |
|
|
699 static void |
|
|
700 operate_and_get_next (int count, int c) |
|
|
701 { |
|
|
702 int where; |
|
|
703 extern int history_stifled, history_length, max_input_history; |
|
|
704 |
|
581
|
705 // Accept the current line. |
|
269
|
706 rl_newline (); |
|
|
707 |
|
581
|
708 // Find the current line, and find the next line to use. |
|
269
|
709 where = where_history (); |
|
|
710 |
|
|
711 if (history_stifled && (history_length >= max_input_history)) |
|
|
712 saved_history_line_to_use = where; |
|
|
713 else |
|
|
714 saved_history_line_to_use = where + 1; |
|
|
715 |
|
|
716 old_rl_startup_hook = rl_startup_hook; |
|
|
717 rl_startup_hook = (Function *) set_saved_history; |
|
|
718 } |
|
|
719 |
|
1
|
720 void |
|
|
721 initialize_readline (void) |
|
|
722 { |
|
|
723 // Allow conditional parsing of the ~/.inputrc file |
|
|
724 rl_readline_name = "Octave"; |
|
|
725 |
|
|
726 // Tell the completer that we want to try first. |
|
271
|
727 rl_attempted_completion_function = (CPPFunction *) command_completer; |
|
269
|
728 |
|
|
729 // Bind operate-and-get-next. |
|
|
730 rl_add_defun ("operate-and-get-next", |
|
|
731 (Function *) operate_and_get_next, CTRL ('O')); |
|
1
|
732 } |
|
|
733 |
|
529
|
734 static int |
|
|
735 match_sans_spaces (const char *standard, const char *test) |
|
|
736 { |
|
|
737 const char *tp = test; |
|
|
738 while (*tp == ' ' || *tp == '\t') |
|
|
739 tp++; |
|
|
740 |
|
|
741 const char *ep = test + strlen (test) - 1; |
|
|
742 while (*ep == ' ' || *ep == '\t') |
|
|
743 ep--; |
|
|
744 |
|
|
745 int len = ep - tp + 1; |
|
|
746 |
|
|
747 return (strncmp (standard, tp, len) == 0); |
|
|
748 } |
|
|
749 |
|
581
|
750 // If the user simply hits return, this will produce an empty matrix. |
|
|
751 |
|
529
|
752 static Octave_object |
|
|
753 get_user_input (const Octave_object& args, int nargout, int debug = 0) |
|
|
754 { |
|
|
755 tree_constant retval; |
|
|
756 |
|
|
757 int nargin = args.length (); |
|
|
758 |
|
|
759 int read_as_string = 0; |
|
|
760 |
|
712
|
761 if (nargin == 2) |
|
529
|
762 read_as_string++; |
|
|
763 |
|
|
764 char *prompt = "debug> "; |
|
712
|
765 if (nargin > 0) |
|
529
|
766 { |
|
712
|
767 prompt = args(0).string_value (); |
|
636
|
768 |
|
|
769 if (error_state) |
|
|
770 { |
|
|
771 error ("input: unrecognized argument"); |
|
|
772 return retval; |
|
|
773 } |
|
529
|
774 } |
|
|
775 |
|
|
776 again: |
|
|
777 |
|
|
778 flush_output_to_pager (); |
|
|
779 |
|
|
780 char *input_buf = gnu_readline (prompt); |
|
|
781 |
|
|
782 if (input_buf) |
|
|
783 { |
|
|
784 maybe_save_history (input_buf); |
|
|
785 |
|
|
786 int len = strlen (input_buf); |
|
|
787 |
|
|
788 if (len < 1) |
|
|
789 { |
|
|
790 if (debug) |
|
|
791 goto again; |
|
|
792 else |
|
963
|
793 { |
|
|
794 if (read_as_string) |
|
|
795 return ""; |
|
|
796 else |
|
|
797 return Matrix (); |
|
|
798 } |
|
529
|
799 } |
|
|
800 |
|
|
801 if (match_sans_spaces ("exit", input_buf) |
|
|
802 || match_sans_spaces ("quit", input_buf) |
|
|
803 || match_sans_spaces ("return", input_buf)) |
|
963
|
804 { |
|
|
805 return retval; |
|
|
806 } |
|
529
|
807 else if (read_as_string) |
|
963
|
808 { |
|
|
809 retval = input_buf; |
|
|
810 } |
|
529
|
811 else |
|
|
812 { |
|
|
813 int parse_status = 0; |
|
|
814 retval = eval_string (input_buf, 0, 0, parse_status); |
|
581
|
815 if (retval.is_defined ()) |
|
|
816 { |
|
|
817 if (debug) |
|
|
818 retval.eval (1); |
|
|
819 } |
|
|
820 else |
|
963
|
821 retval = Matrix (); |
|
529
|
822 } |
|
|
823 } |
|
|
824 else |
|
|
825 error ("input: reading user-input failed!"); |
|
|
826 |
|
|
827 if (debug) |
|
|
828 goto again; |
|
|
829 |
|
|
830 return retval; |
|
|
831 } |
|
|
832 |
|
712
|
833 DEFUN ("input", Finput, Sinput, 2, 1, |
|
529
|
834 "input (PROMPT [, S])\n\ |
|
|
835 \n\ |
|
|
836 Prompt user for input. If the second argument is present, return |
|
|
837 value as a string.") |
|
|
838 { |
|
|
839 Octave_object retval; |
|
|
840 |
|
|
841 int nargin = args.length (); |
|
|
842 |
|
712
|
843 if (nargin == 1 || nargin == 2) |
|
529
|
844 retval = get_user_input (args, nargout); |
|
|
845 else |
|
|
846 print_usage ("input"); |
|
|
847 |
|
|
848 return retval; |
|
|
849 } |
|
|
850 |
|
712
|
851 DEFUN ("keyboard", Fkeyboard, Skeyboard, 1, 1, |
|
529
|
852 "keyboard (PROMPT)\n\ |
|
|
853 \n\ |
|
|
854 maybe help in debugging function files") |
|
|
855 { |
|
|
856 Octave_object retval; |
|
|
857 |
|
|
858 int nargin = args.length (); |
|
|
859 |
|
712
|
860 if (nargin == 0 || nargin == 1) |
|
529
|
861 retval = get_user_input (args, nargout, 1); |
|
|
862 else |
|
|
863 print_usage ("keyboard"); |
|
|
864 |
|
|
865 return retval; |
|
|
866 } |
|
|
867 |
|
1
|
868 /* |
|
|
869 ;;; Local Variables: *** |
|
|
870 ;;; mode: C++ *** |
|
|
871 ;;; page-delimiter: "^/\\*" *** |
|
|
872 ;;; End: *** |
|
|
873 */ |
