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