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