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1 // octave-hist.cc -*- C++ -*- |
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2 /* |
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3 |
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1009
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4 Copyright (C) 1992, 1993, 1994, 1995 John W. Eaton |
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5 |
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6 This file is part of Octave. |
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7 |
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8 Octave is free software; you can redistribute it and/or modify it |
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9 under the terms of the GNU General Public License as published by the |
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10 Free Software Foundation; either version 2, or (at your option) any |
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11 later version. |
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12 |
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13 Octave is distributed in the hope that it will be useful, but WITHOUT |
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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16 for more details. |
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17 |
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18 You should have received a copy of the GNU General Public License |
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19 along with Octave; see the file COPYING. If not, write to the Free |
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20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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21 |
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22 The functions listed below were adapted from similar functions from |
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23 GNU Bash, the Bourne Again SHell, copyright (C) 1987, 1989, 1991 Free |
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24 Software Foundation, Inc. |
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25 |
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26 do_history edit_history_readline |
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27 do_edit_history edit_history_add_hist |
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28 |
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29 */ |
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30 |
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240
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31 #ifdef HAVE_CONFIG_H |
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1192
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32 #include <config.h> |
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33 #endif |
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34 |
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1346
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35 #include <csignal> |
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1343
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36 #include <cstdlib> |
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37 #include <cstring> |
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38 |
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1350
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39 #include <fstream.h> |
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40 #include <strstream.h> |
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41 |
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42 #ifdef HAVE_UNISTD_H |
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43 #include <sys/types.h> |
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44 #include <unistd.h> |
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45 #endif |
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46 |
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47 #include <fcntl.h> |
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48 |
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1465
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49 #include <readline/history.h> |
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50 |
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1352
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51 #include "defun.h" |
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52 #include "error.h" |
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53 #include "input.h" |
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1352
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54 #include "oct-obj.h" |
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55 #include "octave-hist.h" |
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1
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56 #include "octave.h" |
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1352
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57 #include "pager.h" |
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58 #include "sighandlers.h" |
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59 #include "statdefs.h" |
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60 #include "unwind-prot.h" |
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195
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61 #include "user-prefs.h" |
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1352
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62 #include "utils.h" |
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63 |
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168
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64 // Nonzero means input is coming from temporary history file. |
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65 int input_from_tmp_history_file = 0; |
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66 |
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67 // Nonzero means we are saving history lines. |
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68 int saving_history = 1; |
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69 |
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70 // The number of lines to save in the history file. |
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71 static int octave_hist_size = 1024; |
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72 |
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73 // The name of the history file. |
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74 static char *octave_hist_file; |
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75 |
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76 // The number of hisory lines we read from the history file. |
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77 static int history_lines_in_file = 0; |
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78 |
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79 // The number of history lines we've saved so far. |
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80 static int history_lines_this_session = 0; |
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81 |
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581
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82 // Get some default values, possibly reading them from the |
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83 // environment. |
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84 |
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85 static int |
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86 default_history_size (void) |
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87 { |
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88 int size = 1024; |
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89 char *env_size = getenv ("OCTAVE_HISTSIZE"); |
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529
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90 if (env_size) |
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91 { |
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92 int val; |
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93 if (sscanf (env_size, "%d", &val) == 1) |
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94 size = val > 0 ? val : 0; |
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95 } |
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96 return size; |
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97 } |
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98 |
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99 static char * |
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100 default_history_file (void) |
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101 { |
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529
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102 char *file = 0; |
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103 |
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104 char *env_file = getenv ("OCTAVE_HISTFILE"); |
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529
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105 if (env_file) |
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106 { |
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107 fstream f (env_file, (ios::in | ios::out)); |
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529
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108 if (f) |
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109 { |
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110 file = strsave (env_file); |
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111 f.close (); |
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112 } |
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113 } |
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114 |
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529
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115 if (! file && home_directory) |
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116 file = strconcat (home_directory, "/.octave_hist"); |
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117 |
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118 return file; |
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119 } |
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120 |
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121 // Prime the history list. |
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122 |
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123 void |
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124 initialize_history (void) |
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125 { |
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126 octave_hist_file = default_history_file (); |
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127 octave_hist_size = default_history_size (); |
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128 |
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129 read_history (octave_hist_file); |
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130 using_history (); |
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131 history_lines_in_file = where_history (); |
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132 } |
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133 |
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134 void |
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135 clean_up_history (void) |
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136 { |
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137 stifle_history (octave_hist_size); |
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138 write_history (octave_hist_file); |
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139 } |
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140 |
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141 void |
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142 maybe_save_history (const char *s) |
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143 { |
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144 if (saving_history) |
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145 { |
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146 add_history (s); |
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147 history_lines_this_session++; |
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148 } |
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149 } |
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150 |
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151 // Display, save, or load history. Stolen and modified from bash. |
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152 // |
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153 // Arg of -w FILENAME means write file, arg of -r FILENAME |
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154 // means read file, arg of -q means don't number lines. Arg of N |
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155 // means only display that many items. |
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156 |
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157 void |
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158 do_history (int argc, char **argv) |
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159 { |
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160 HIST_ENTRY **hlist; |
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161 |
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162 int numbered_output = 1; |
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163 |
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164 while (--argc > 0) |
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165 { |
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166 argv++; |
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167 |
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168 if (*argv[0] == '-' && strlen (*argv) == 2 |
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169 && ((*argv)[1] == 'r' || (*argv)[1] == 'w' |
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170 || (*argv)[1] == 'a' || (*argv)[1] == 'n')) |
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171 { |
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172 char *file; |
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173 int result = 0; |
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174 |
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175 if (argc > 1) |
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176 file = *(argv+1); |
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177 else |
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178 file = octave_hist_file; |
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179 |
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180 switch ((*argv)[1]) |
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181 { |
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182 case 'a': // Append `new' lines to file. |
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183 { |
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184 if (history_lines_this_session) |
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185 { |
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186 if (history_lines_this_session < where_history ()) |
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187 { |
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1358
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188 // If the filename was supplied, then create |
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189 // it if it doesn't already exist. |
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190 |
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1
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191 if (file) |
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192 { |
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193 struct stat buf; |
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194 |
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195 if (stat (file, &buf) == -1) |
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196 { |
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197 int tem; |
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198 |
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199 tem = open (file, O_CREAT, 0666); |
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200 close (tem); |
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201 } |
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202 } |
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203 |
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204 result = |
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205 append_history (history_lines_this_session, file); |
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206 history_lines_in_file += history_lines_this_session; |
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207 history_lines_this_session = 0; |
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208 } |
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209 } |
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210 } |
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211 break; |
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777
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212 |
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213 case 'w': // Write entire history. |
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214 result = write_history (file); |
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215 break; |
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777
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216 |
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217 case 'r': // Read entire file. |
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218 result = read_history (file); |
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219 break; |
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220 |
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221 case 'n': // Read `new' history from file. |
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222 |
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223 // Read all of the lines in the file that we haven't |
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224 // already read. |
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225 |
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226 using_history (); |
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227 result = read_history_range (file, history_lines_in_file, -1); |
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228 using_history (); |
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229 history_lines_in_file = where_history (); |
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230 break; |
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231 } |
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232 return; |
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233 } |
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234 else if (strcmp (*argv, "-q") == 0) |
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235 numbered_output = 0; |
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236 else if (strcmp (*argv, "--") == 0) |
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237 { |
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238 argc--; |
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239 argv++; |
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240 break; |
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241 } |
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242 else |
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243 break; |
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244 } |
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245 |
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246 int limited = 0; |
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247 int limit = 0; |
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248 |
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249 if (argc > 0) |
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250 { |
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251 limited = 1; |
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252 if (sscanf (*argv, "%d", &limit) != 1) |
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253 { |
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254 if (*argv[0] == '-') |
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217
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255 error ("history: unrecognized option `%s'", *argv); |
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256 else |
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217
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257 error ("history: bad non-numeric arg `%s'", *argv); |
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258 return; |
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259 } |
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260 } |
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261 |
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262 hlist = history_list (); |
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263 |
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264 if (hlist) |
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265 { |
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266 int i = 0; |
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267 |
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268 for (i = 0; hlist[i]; i++) |
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269 ; // Do nothing. |
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270 |
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271 if (limit < 0) |
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272 limit = -limit; |
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273 |
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274 if (!limited) |
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275 i = 0; |
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276 else |
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277 if ((i -= limit) < 0) |
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278 i = 0; |
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279 |
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581
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280 ostrstream output_buf; |
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281 |
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1
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282 while (hlist[i]) |
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283 { |
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284 // QUIT; // in bash: (interrupt_state) throw_to_top_level (); |
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285 |
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286 if (numbered_output) |
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287 output_buf.form ("%5d%c", i + history_base, |
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288 hlist[i]->data ? '*' : ' '); |
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289 output_buf << hlist[i]->line << "\n"; |
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290 i++; |
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291 } |
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292 |
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293 output_buf << ends; |
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294 maybe_page_output (output_buf); |
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295 } |
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296 } |
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297 |
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298 // Read the edited history lines from STREAM and return them |
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299 // one at a time. This can read unlimited length lines. The |
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300 // caller should free the storage. |
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301 |
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302 static char * |
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303 edit_history_readline (fstream& stream) |
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304 { |
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305 char c; |
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306 int line_len = 128; |
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307 int lindex = 0; |
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308 char *line = new char [line_len]; |
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309 line[0] = '\0'; |
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310 |
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311 while (stream.get (c)) |
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312 { |
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313 if (lindex + 2 >= line_len) |
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314 { |
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315 char *tmp_line = new char [line_len += 128]; |
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316 strcpy (tmp_line, line); |
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317 delete [] line; |
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318 line = tmp_line; |
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319 } |
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320 |
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321 if (c == '\n') |
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322 { |
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323 line[lindex++] = '\n'; |
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324 line[lindex++] = '\0'; |
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325 return line; |
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326 } |
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327 else |
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328 line[lindex++] = c; |
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329 } |
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330 |
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331 if (! lindex) |
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332 { |
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333 delete [] line; |
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529
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334 return 0; |
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1
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335 } |
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336 |
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337 if (lindex + 2 >= line_len) |
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338 { |
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339 char *tmp_line = new char [lindex+3]; |
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340 strcpy (tmp_line, line); |
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341 delete [] line; |
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342 line = tmp_line; |
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343 } |
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344 |
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1358
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345 // Finish with newline if none in file. |
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346 |
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347 line[lindex++] = '\n'; |
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348 line[lindex++] = '\0'; |
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349 return line; |
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350 } |
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351 |
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581
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352 // Use `command' to replace the last entry in the history list, which, |
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353 // by this time, is `run_history blah...'. The intent is that the |
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354 // new command become the history entry, and that `fc' should never |
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355 // appear in the history list. This way you can do `run_history' to |
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356 // your heart's content. |
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357 |
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64
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358 static void |
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359 edit_history_repl_hist (char *command) |
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360 { |
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529
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361 if (! command || ! *command) |
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64
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362 return; |
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363 |
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364 HIST_ENTRY **hlist = history_list (); |
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365 |
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529
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366 if (! hlist) |
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64
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367 return; |
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368 |
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1321
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369 int i = 0; |
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370 |
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371 for (i = 0; hlist[i]; i++) |
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64
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372 ; // Count 'em. |
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373 i--; |
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374 |
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1358
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375 // History_get () takes a parameter that should be offset by history_base. |
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64
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376 |
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1358
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377 // Don't free this. |
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64
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378 HIST_ENTRY *histent = history_get (history_base + i); |
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529
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379 if (! histent) |
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64
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380 return; |
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381 |
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529
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382 char *data = 0; |
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383 if (histent->data) |
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64
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384 { |
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385 int len = strlen (histent->data); |
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386 data = (char *) malloc (len); |
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387 strcpy (data, histent->data); |
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388 } |
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389 |
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390 int n = strlen (command); |
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391 |
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392 if (command[n - 1] == '\n') |
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393 command[n - 1] = '\0'; |
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394 |
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529
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395 if (command && *command) |
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64
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396 { |
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397 HIST_ENTRY *discard = replace_history_entry (i, command, data); |
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529
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398 if (discard) |
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64
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399 { |
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529
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400 if (discard->line) |
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64
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401 free (discard->line); |
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402 |
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403 free ((char *) discard); |
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404 } |
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405 } |
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406 } |
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407 |
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1
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408 static void |
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409 edit_history_add_hist (char *line) |
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410 { |
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529
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411 if (line) |
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1
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412 { |
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413 int len = strlen (line); |
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414 if (len > 0 && line[len-1] == '\n') |
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415 line[len-1] = '\0'; |
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416 |
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417 if (line[0] != '\0') |
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418 add_history (line); |
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419 } |
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420 } |
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421 |
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422 #define histline(i) (hlist[(i)]->line) |
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423 |
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64
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424 static char * |
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425 mk_tmp_hist_file (int argc, char **argv, int insert_curr, char *warn_for) |
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1
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426 { |
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427 HIST_ENTRY **hlist; |
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428 |
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429 hlist = history_list (); |
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430 |
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431 int hist_count = 0; |
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432 |
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529
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433 while (hlist[hist_count++]) |
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1
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434 ; // Find the number of items in the history list. |
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435 |
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1358
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436 // The current command line is already part of the history list by |
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437 // the time we get to this point. Delete it from the list. |
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1
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438 |
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439 hist_count -= 2; |
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64
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440 if (! insert_curr) |
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441 remove_history (hist_count); |
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1
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442 hist_count--; |
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443 |
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1358
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444 // If no numbers have been specified, the default is to edit the |
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445 // last command in the history list. |
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1
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446 |
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447 int hist_end = hist_count; |
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448 int hist_beg = hist_count; |
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449 int reverse = 0; |
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450 |
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1358
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451 // Process options. |
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1
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452 |
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453 int usage_error = 0; |
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454 if (argc == 3) |
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455 { |
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456 argv++; |
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457 if (sscanf (*argv++, "%d", &hist_beg) != 1 |
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458 || sscanf (*argv, "%d", &hist_end) != 1) |
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459 usage_error = 1; |
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460 else |
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461 { |
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462 hist_beg--; |
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463 hist_end--; |
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464 } |
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465 } |
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466 else if (argc == 2) |
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467 { |
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468 argv++; |
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469 if (sscanf (*argv++, "%d", &hist_beg) != 1) |
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470 usage_error = 1; |
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471 else |
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472 { |
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473 hist_beg--; |
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474 hist_end = hist_beg; |
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475 } |
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476 } |
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477 |
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478 if (hist_beg < 0 || hist_end < 0 || hist_beg > hist_count |
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479 || hist_end > hist_count) |
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480 { |
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64
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481 error ("%s: history specification out of range", warn_for); |
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529
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482 return 0; |
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1
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483 } |
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484 |
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485 if (usage_error) |
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486 { |
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64
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487 usage ("%s [first] [last]", warn_for); |
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529
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488 return 0; |
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1
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489 } |
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490 |
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491 if (hist_end < hist_beg) |
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492 { |
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493 int t = hist_end; |
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494 hist_end = hist_beg; |
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495 hist_beg = t; |
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496 reverse = 1; |
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497 } |
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498 |
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641
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499 char *name = octave_tmp_file_name (); |
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1
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500 |
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501 fstream file (name, ios::out); |
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64
|
502 |
|
1
|
503 if (! file) |
|
|
504 { |
|
64
|
505 error ("%s: couldn't open temporary file `%s'", warn_for, name); |
|
529
|
506 return 0; |
|
1
|
507 } |
|
|
508 |
|
|
509 if (reverse) |
|
|
510 { |
|
|
511 for (int i = hist_end; i >= hist_beg; i--) |
|
|
512 file << histline (i) << "\n"; |
|
|
513 } |
|
|
514 else |
|
|
515 { |
|
|
516 for (int i = hist_beg; i <= hist_end; i++) |
|
|
517 file << histline (i) << "\n"; |
|
|
518 } |
|
|
519 |
|
|
520 file.close (); |
|
|
521 |
|
168
|
522 return strsave (name); |
|
64
|
523 } |
|
|
524 |
|
|
525 void |
|
|
526 do_edit_history (int argc, char **argv) |
|
|
527 { |
|
|
528 char *name = mk_tmp_hist_file (argc, argv, 0, "edit_history"); |
|
|
529 |
|
529
|
530 if (! name) |
|
64
|
531 return; |
|
|
532 |
|
1358
|
533 // Call up our favorite editor on the file of commands. |
|
1
|
534 |
|
|
535 ostrstream buf; |
|
195
|
536 buf << user_pref.editor << " " << name << ends; |
|
1
|
537 char *cmd = buf.str (); |
|
|
538 |
|
1358
|
539 // Ignore interrupts while we are off editing commands. Should we |
|
|
540 // maybe avoid using system()? |
|
1
|
541 |
|
1443
|
542 volatile sig_handler *saved_sigint_handler |
|
|
543 = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
|
544 |
|
1
|
545 system (cmd); |
|
1443
|
546 |
|
|
547 octave_set_signal_handler (SIGINT, saved_sigint_handler); |
|
1
|
548 |
|
1358
|
549 // Write the commands to the history file since parse_and_execute |
|
|
550 // disables command line history while it executes. |
|
1
|
551 |
|
64
|
552 fstream file (name, ios::in); |
|
1
|
553 |
|
|
554 char *line; |
|
64
|
555 int first = 1; |
|
529
|
556 while ((line = edit_history_readline (file)) != 0) |
|
1
|
557 { |
|
1358
|
558 // Skip blank lines. |
|
1
|
559 |
|
|
560 if (line[0] == '\n') |
|
|
561 { |
|
|
562 delete [] line; |
|
|
563 continue; |
|
|
564 } |
|
|
565 |
|
64
|
566 if (first) |
|
|
567 { |
|
|
568 first = 0; |
|
|
569 edit_history_repl_hist (line); |
|
|
570 } |
|
|
571 else |
|
|
572 edit_history_add_hist (line); |
|
1
|
573 } |
|
|
574 |
|
|
575 file.close (); |
|
|
576 |
|
1358
|
577 // Turn on command echo, so the output from this will make better |
|
|
578 // sense. |
|
1
|
579 |
|
|
580 begin_unwind_frame ("do_edit_history"); |
|
1588
|
581 unwind_protect_int (user_pref.echo_executing_commands); |
|
168
|
582 unwind_protect_int (input_from_tmp_history_file); |
|
1588
|
583 user_pref.echo_executing_commands = ECHO_CMD_LINE; |
|
168
|
584 input_from_tmp_history_file = 1; |
|
1
|
585 |
|
|
586 parse_and_execute (name, 1); |
|
|
587 |
|
|
588 run_unwind_frame ("do_edit_history"); |
|
|
589 |
|
1358
|
590 // Delete the temporary file. Should probably be done with an |
|
|
591 // unwind_protect. |
|
1
|
592 |
|
|
593 unlink (name); |
|
168
|
594 |
|
|
595 delete [] name; |
|
1
|
596 } |
|
|
597 |
|
64
|
598 void |
|
|
599 do_run_history (int argc, char **argv) |
|
|
600 { |
|
|
601 char *name = mk_tmp_hist_file (argc, argv, 1, "run_history"); |
|
|
602 |
|
529
|
603 if (! name) |
|
64
|
604 return; |
|
|
605 |
|
1358
|
606 // Turn on command echo, so the output from this will make better |
|
|
607 // sense. |
|
64
|
608 |
|
|
609 begin_unwind_frame ("do_run_history"); |
|
1588
|
610 unwind_protect_int (user_pref.echo_executing_commands); |
|
168
|
611 unwind_protect_int (input_from_tmp_history_file); |
|
1588
|
612 user_pref.echo_executing_commands = ECHO_CMD_LINE; |
|
168
|
613 input_from_tmp_history_file = 1; |
|
64
|
614 |
|
|
615 parse_and_execute (name, 1); |
|
|
616 |
|
|
617 run_unwind_frame ("do_run_history"); |
|
|
618 |
|
1358
|
619 // Delete the temporary file. Should probably be done with an |
|
|
620 // unwind_protect. |
|
64
|
621 |
|
|
622 unlink (name); |
|
168
|
623 |
|
|
624 delete [] name; |
|
64
|
625 } |
|
|
626 |
|
1
|
627 int |
|
|
628 current_history_number (void) |
|
|
629 { |
|
|
630 using_history (); |
|
|
631 |
|
|
632 if (octave_hist_size > 0) |
|
|
633 return history_base + where_history (); |
|
|
634 else |
|
|
635 return -1; |
|
|
636 |
|
|
637 } |
|
|
638 |
|
1488
|
639 DEFUN_TEXT ("edit_history", Fedit_history, Sedit_history, 10, |
|
529
|
640 "edit_history [first] [last]\n\ |
|
|
641 \n\ |
|
|
642 edit commands from the history list") |
|
|
643 { |
|
|
644 Octave_object retval; |
|
|
645 |
|
|
646 DEFINE_ARGV("edit_history"); |
|
|
647 |
|
|
648 do_edit_history (argc, argv); |
|
|
649 |
|
|
650 DELETE_ARGV; |
|
|
651 |
|
|
652 return retval; |
|
|
653 } |
|
|
654 |
|
1488
|
655 DEFUN_TEXT ("history", Fhistory, Shistory, 10, |
|
529
|
656 "history [N] [-w file] [-r file] [-q]\n\ |
|
|
657 \n\ |
|
|
658 display, save, or load command history") |
|
|
659 { |
|
|
660 Octave_object retval; |
|
|
661 |
|
|
662 DEFINE_ARGV("history"); |
|
|
663 |
|
|
664 do_history (argc, argv); |
|
|
665 |
|
|
666 DELETE_ARGV; |
|
|
667 |
|
|
668 return retval; |
|
|
669 } |
|
|
670 |
|
1488
|
671 DEFUN_TEXT ("run_history", Frun_history, Srun_history, 10, |
|
529
|
672 "run_history [first] [last]\n\ |
|
|
673 \n\ |
|
|
674 run commands from the history list") |
|
|
675 { |
|
|
676 Octave_object retval; |
|
|
677 |
|
|
678 DEFINE_ARGV("run_history"); |
|
|
679 |
|
|
680 do_run_history (argc, argv); |
|
|
681 |
|
|
682 DELETE_ARGV; |
|
|
683 |
|
|
684 return retval; |
|
|
685 } |
|
|
686 |
|
1
|
687 /* |
|
|
688 ;;; Local Variables: *** |
|
|
689 ;;; mode: C++ *** |
|
|
690 ;;; page-delimiter: "^/\\*" *** |
|
|
691 ;;; End: *** |
|
|
692 */ |
