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