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1 // oct-hist.cc -*- C++ -*- |
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2 /* |
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3 |
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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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32 #include <config.h> |
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33 #endif |
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34 |
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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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1750
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39 #include <string> |
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40 |
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41 #include <fstream.h> |
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42 #include <strstream.h> |
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43 |
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44 #ifdef HAVE_UNISTD_H |
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45 #include <sys/types.h> |
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46 #include <unistd.h> |
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47 #endif |
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48 |
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49 #include <fcntl.h> |
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50 |
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51 #include <readline/history.h> |
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52 |
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53 #include "str-vec.h" |
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54 |
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55 #include "defun.h" |
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56 #include "error.h" |
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1766
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57 #include "file-ops.h" |
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58 #include "input.h" |
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1742
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59 #include "oct-hist.h" |
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1750
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60 #include "oct-obj.h" |
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1352
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61 #include "pager.h" |
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62 #include "sighandlers.h" |
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1690
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63 #include "sysdep.h" |
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64 #include "toplev.h" |
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65 #include "unwind-prot.h" |
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195
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66 #include "user-prefs.h" |
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67 #include "utils.h" |
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68 |
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168
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69 // Nonzero means input is coming from temporary history file. |
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70 int input_from_tmp_history_file = 0; |
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71 |
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72 // The number of hisory lines we read from the history file. |
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73 static int history_lines_in_file = 0; |
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74 |
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75 // The number of history lines we've saved so far. |
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76 static int history_lines_this_session = 0; |
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77 |
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581
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78 // Get some default values, possibly reading them from the |
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79 // environment. |
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80 |
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81 int |
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82 default_history_size (void) |
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83 { |
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84 int size = 1024; |
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85 char *env_size = getenv ("OCTAVE_HISTSIZE"); |
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529
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86 if (env_size) |
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1
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87 { |
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88 int val; |
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89 if (sscanf (env_size, "%d", &val) == 1) |
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90 size = val > 0 ? val : 0; |
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91 } |
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92 return size; |
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93 } |
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94 |
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95 string |
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96 default_history_file (void) |
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97 { |
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98 string file; |
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99 |
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100 char *env_file = getenv ("OCTAVE_HISTFILE"); |
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101 |
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102 if (env_file) |
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103 { |
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104 fstream f (env_file, (ios::in | ios::out)); |
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105 |
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529
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106 if (f) |
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107 { |
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108 file = env_file; |
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109 f.close (); |
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110 } |
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111 } |
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112 |
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113 if (file.empty ()) |
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114 { |
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115 if (! home_directory.empty ()) |
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116 file = home_directory.append ("/.octave_hist"); |
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117 else |
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118 file = ".octave_hist"; |
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119 } |
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120 |
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121 return file; |
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122 } |
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123 |
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124 // Prime the history list. |
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125 |
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126 void |
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127 initialize_history (void) |
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128 { |
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129 string file = oct_tilde_expand (user_pref.history_file); |
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130 |
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131 read_history (file.c_str ()); |
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132 |
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133 using_history (); |
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134 |
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135 history_lines_in_file = where_history (); |
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136 } |
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137 |
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138 void |
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139 clean_up_history (void) |
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140 { |
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141 stifle_history (user_pref.history_size); |
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142 |
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143 string file = oct_tilde_expand (user_pref.history_file); |
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144 |
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145 if (user_pref.saving_history) |
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146 write_history (file.c_str ()); |
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147 } |
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148 |
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149 void |
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150 maybe_save_history (const string& s) |
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151 { |
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152 if (user_pref.saving_history && ! input_from_startup_file) |
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153 { |
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154 add_history (s.c_str ()); |
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155 history_lines_this_session++; |
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156 } |
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157 } |
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158 |
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159 // Display, save, or load history. Stolen and modified from bash. |
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160 // |
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161 // Arg of -w FILENAME means write file, arg of -r FILENAME |
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162 // means read file, arg of -q means don't number lines. Arg of N |
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163 // means only display that many items. |
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164 |
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165 static void |
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166 do_history (int argc, const string_vector& argv) |
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167 { |
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168 HIST_ENTRY **hlist; |
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169 |
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170 int numbered_output = 1; |
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171 |
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172 int i; |
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173 for (i = 1; i < argc; i++) |
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1
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174 { |
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175 if (argv[i][0] == '-' && argv[i].length () == 2 |
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176 && (argv[i][1] == 'r' || argv[i][1] == 'w' |
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177 || argv[i][1] == 'a' || argv[i][1] == 'n')) |
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1
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178 { |
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179 int result = 0; |
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180 |
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1750
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181 string file; |
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182 |
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183 if (i < argc - 1) |
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184 file = oct_tilde_expand (argv[i+1]); |
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185 else |
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186 file = oct_tilde_expand (user_pref.history_file); |
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187 |
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188 switch (argv[i][1]) |
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189 { |
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190 case 'a': // Append `new' lines to file. |
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191 { |
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192 if (history_lines_this_session) |
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193 { |
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194 if (history_lines_this_session < where_history ()) |
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195 { |
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1750
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196 // Create file if it doesn't already exist. |
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197 |
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198 file_stat fs (file); |
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199 |
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1766
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200 if (! fs) |
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1750
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201 { |
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202 int tem; |
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203 |
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204 tem = open (file.c_str (), O_CREAT, 0666); |
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205 close (tem); |
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206 } |
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207 |
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208 result |
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209 = append_history (history_lines_this_session, |
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210 file.c_str ()); |
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211 |
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212 history_lines_in_file += history_lines_this_session; |
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213 history_lines_this_session = 0; |
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214 } |
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215 } |
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216 } |
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217 break; |
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218 |
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219 case 'w': // Write entire history. |
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220 result = write_history (file.c_str ()); |
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221 break; |
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222 |
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223 case 'r': // Read entire file. |
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224 result = read_history (file.c_str ()); |
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225 break; |
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226 |
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227 case 'n': // Read `new' history from file. |
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228 |
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229 // Read all of the lines in the file that we haven't |
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230 // already read. |
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231 |
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232 using_history (); |
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233 result = read_history_range (file.c_str (), |
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234 history_lines_in_file, -1); |
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235 using_history (); |
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236 history_lines_in_file = where_history (); |
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237 break; |
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238 } |
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239 return; |
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240 } |
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241 else if (argv[i] == "-q") |
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242 numbered_output = 0; |
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243 else if (argv[i] == "--") |
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1
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244 { |
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245 i++; |
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1
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246 break; |
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247 } |
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248 else |
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249 break; |
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250 } |
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251 |
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252 int limited = 0; |
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253 int limit = 0; |
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254 |
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255 if (i < argc) |
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256 { |
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257 limited = 1; |
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258 if (sscanf (argv[i].c_str (), "%d", &limit) != 1) |
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1
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259 { |
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260 if (argv[i][0] == '-') |
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261 error ("history: unrecognized option `%s'", argv[i].c_str ()); |
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262 else |
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263 error ("history: bad non-numeric arg `%s'", argv[i].c_str ()); |
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264 return; |
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265 } |
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266 } |
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267 |
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268 hlist = history_list (); |
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269 |
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270 if (hlist) |
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271 { |
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1321
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272 int i = 0; |
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273 |
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274 for (i = 0; hlist[i]; i++) |
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275 ; // Do nothing. |
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276 |
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277 if (limit < 0) |
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278 limit = -limit; |
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279 |
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280 if (!limited) |
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281 i = 0; |
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282 else |
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283 if ((i -= limit) < 0) |
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284 i = 0; |
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285 |
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581
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286 ostrstream output_buf; |
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287 |
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1
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288 while (hlist[i]) |
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289 { |
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290 // QUIT; // in bash: (interrupt_state) throw_to_top_level (); |
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291 |
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292 if (numbered_output) |
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293 output_buf.form ("%5d%c", i + history_base, |
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294 hlist[i]->data ? '*' : ' '); |
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295 output_buf << hlist[i]->line << "\n"; |
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1
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296 i++; |
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297 } |
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581
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298 |
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299 output_buf << ends; |
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300 maybe_page_output (output_buf); |
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301 } |
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302 } |
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303 |
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581
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304 // Read the edited history lines from STREAM and return them |
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305 // one at a time. This can read unlimited length lines. The |
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306 // caller should free the storage. |
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307 |
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308 static char * |
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309 edit_history_readline (fstream& stream) |
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310 { |
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311 char c; |
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312 int line_len = 128; |
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313 int lindex = 0; |
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314 char *line = new char [line_len]; |
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315 line[0] = '\0'; |
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316 |
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317 while (stream.get (c)) |
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318 { |
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319 if (lindex + 2 >= line_len) |
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320 { |
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321 char *tmp_line = new char [line_len += 128]; |
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322 strcpy (tmp_line, line); |
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323 delete [] line; |
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324 line = tmp_line; |
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325 } |
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326 |
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327 if (c == '\n') |
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328 { |
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329 line[lindex++] = '\n'; |
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330 line[lindex++] = '\0'; |
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331 return line; |
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332 } |
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333 else |
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334 line[lindex++] = c; |
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335 } |
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336 |
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337 if (! lindex) |
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338 { |
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339 delete [] line; |
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529
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340 return 0; |
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1
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341 } |
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342 |
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343 if (lindex + 2 >= line_len) |
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344 { |
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345 char *tmp_line = new char [lindex+3]; |
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346 strcpy (tmp_line, line); |
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347 delete [] line; |
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348 line = tmp_line; |
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349 } |
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350 |
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1358
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351 // Finish with newline if none in file. |
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1
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352 |
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353 line[lindex++] = '\n'; |
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354 line[lindex++] = '\0'; |
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355 return line; |
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356 } |
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357 |
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581
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358 // Use `command' to replace the last entry in the history list, which, |
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359 // by this time, is `run_history blah...'. The intent is that the |
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360 // new command become the history entry, and that `fc' should never |
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361 // appear in the history list. This way you can do `run_history' to |
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362 // your heart's content. |
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363 |
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64
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364 static void |
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365 edit_history_repl_hist (char *command) |
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366 { |
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529
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367 if (! command || ! *command) |
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64
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368 return; |
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369 |
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370 HIST_ENTRY **hlist = history_list (); |
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371 |
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529
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372 if (! hlist) |
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64
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373 return; |
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374 |
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1321
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375 int i = 0; |
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376 |
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377 for (i = 0; hlist[i]; i++) |
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64
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378 ; // Count 'em. |
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379 i--; |
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380 |
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1358
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381 // History_get () takes a parameter that should be offset by history_base. |
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64
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382 |
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1358
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383 // Don't free this. |
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64
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384 HIST_ENTRY *histent = history_get (history_base + i); |
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529
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385 if (! histent) |
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64
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386 return; |
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387 |
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529
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388 char *data = 0; |
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389 if (histent->data) |
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64
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390 { |
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391 int len = strlen (histent->data); |
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392 data = (char *) malloc (len); |
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393 strcpy (data, histent->data); |
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394 } |
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395 |
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396 int n = strlen (command); |
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397 |
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398 if (command[n - 1] == '\n') |
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399 command[n - 1] = '\0'; |
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400 |
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529
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401 if (command && *command) |
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64
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402 { |
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403 HIST_ENTRY *discard = replace_history_entry (i, command, data); |
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529
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404 if (discard) |
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64
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405 { |
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529
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406 if (discard->line) |
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64
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407 free (discard->line); |
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408 |
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409 free ((char *) discard); |
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410 } |
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411 } |
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412 } |
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413 |
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1
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414 static void |
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415 edit_history_add_hist (char *line) |
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416 { |
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529
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417 if (line) |
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1
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418 { |
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419 int len = strlen (line); |
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420 if (len > 0 && line[len-1] == '\n') |
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421 line[len-1] = '\0'; |
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422 |
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423 if (line[0] != '\0') |
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424 add_history (line); |
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425 } |
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426 } |
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427 |
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428 #define histline(i) (hlist[(i)]->line) |
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429 |
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1755
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430 static string |
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431 mk_tmp_hist_file (int argc, const string_vector& argv, |
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432 int insert_curr, char *warn_for) |
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1
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433 { |
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434 HIST_ENTRY **hlist; |
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435 |
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436 hlist = history_list (); |
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437 |
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438 int hist_count = 0; |
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439 |
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529
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440 while (hlist[hist_count++]) |
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1
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441 ; // Find the number of items in the history list. |
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442 |
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1358
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443 // The current command line is already part of the history list by |
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444 // the time we get to this point. Delete it from the list. |
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1
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445 |
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446 hist_count -= 2; |
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64
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447 if (! insert_curr) |
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448 remove_history (hist_count); |
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1
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449 hist_count--; |
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450 |
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1358
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451 // If no numbers have been specified, the default is to edit the |
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452 // last command in the history list. |
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1
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453 |
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454 int hist_end = hist_count; |
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455 int hist_beg = hist_count; |
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456 int reverse = 0; |
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457 |
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1358
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458 // Process options. |
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1
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459 |
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460 int usage_error = 0; |
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461 if (argc == 3) |
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462 { |
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1755
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463 if (sscanf (argv[1].c_str (), "%d", &hist_beg) != 1 |
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464 || sscanf (argv[2].c_str (), "%d", &hist_end) != 1) |
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1
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465 usage_error = 1; |
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466 else |
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467 { |
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468 hist_beg--; |
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469 hist_end--; |
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470 } |
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471 } |
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472 else if (argc == 2) |
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473 { |
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1755
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474 if (sscanf (argv[1].c_str (), "%d", &hist_beg) != 1) |
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1
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475 usage_error = 1; |
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476 else |
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477 { |
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478 hist_beg--; |
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479 hist_end = hist_beg; |
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480 } |
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481 } |
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482 |
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483 if (hist_beg < 0 || hist_end < 0 || hist_beg > hist_count |
|
|
484 || hist_end > hist_count) |
|
|
485 { |
|
64
|
486 error ("%s: history specification out of range", warn_for); |
|
529
|
487 return 0; |
|
1
|
488 } |
|
|
489 |
|
|
490 if (usage_error) |
|
|
491 { |
|
64
|
492 usage ("%s [first] [last]", warn_for); |
|
529
|
493 return 0; |
|
1
|
494 } |
|
|
495 |
|
|
496 if (hist_end < hist_beg) |
|
|
497 { |
|
|
498 int t = hist_end; |
|
|
499 hist_end = hist_beg; |
|
|
500 hist_beg = t; |
|
|
501 reverse = 1; |
|
|
502 } |
|
|
503 |
|
1755
|
504 string name = octave_tmp_file_name (); |
|
1
|
505 |
|
1755
|
506 fstream file (name.c_str (), ios::out); |
|
64
|
507 |
|
1
|
508 if (! file) |
|
|
509 { |
|
1755
|
510 error ("%s: couldn't open temporary file `%s'", warn_for, |
|
|
511 name.c_str ()); |
|
529
|
512 return 0; |
|
1
|
513 } |
|
|
514 |
|
|
515 if (reverse) |
|
|
516 { |
|
|
517 for (int i = hist_end; i >= hist_beg; i--) |
|
|
518 file << histline (i) << "\n"; |
|
|
519 } |
|
|
520 else |
|
|
521 { |
|
|
522 for (int i = hist_beg; i <= hist_end; i++) |
|
|
523 file << histline (i) << "\n"; |
|
|
524 } |
|
|
525 |
|
|
526 file.close (); |
|
|
527 |
|
1755
|
528 return name; |
|
64
|
529 } |
|
|
530 |
|
1755
|
531 static void |
|
|
532 do_edit_history (int argc, const string_vector& argv) |
|
64
|
533 { |
|
1755
|
534 string name = mk_tmp_hist_file (argc, argv, 0, "edit_history"); |
|
64
|
535 |
|
1755
|
536 if (name.empty ()) |
|
64
|
537 return; |
|
|
538 |
|
1358
|
539 // Call up our favorite editor on the file of commands. |
|
1
|
540 |
|
|
541 ostrstream buf; |
|
195
|
542 buf << user_pref.editor << " " << name << ends; |
|
1
|
543 char *cmd = buf.str (); |
|
|
544 |
|
1358
|
545 // Ignore interrupts while we are off editing commands. Should we |
|
|
546 // maybe avoid using system()? |
|
1
|
547 |
|
1443
|
548 volatile sig_handler *saved_sigint_handler |
|
|
549 = octave_set_signal_handler (SIGINT, SIG_IGN); |
|
|
550 |
|
1
|
551 system (cmd); |
|
1443
|
552 |
|
|
553 octave_set_signal_handler (SIGINT, saved_sigint_handler); |
|
1
|
554 |
|
1358
|
555 // Write the commands to the history file since parse_and_execute |
|
|
556 // disables command line history while it executes. |
|
1
|
557 |
|
1755
|
558 fstream file (name.c_str (), ios::in); |
|
1
|
559 |
|
|
560 char *line; |
|
64
|
561 int first = 1; |
|
529
|
562 while ((line = edit_history_readline (file)) != 0) |
|
1
|
563 { |
|
1358
|
564 // Skip blank lines. |
|
1
|
565 |
|
|
566 if (line[0] == '\n') |
|
|
567 { |
|
|
568 delete [] line; |
|
|
569 continue; |
|
|
570 } |
|
|
571 |
|
64
|
572 if (first) |
|
|
573 { |
|
|
574 first = 0; |
|
|
575 edit_history_repl_hist (line); |
|
|
576 } |
|
|
577 else |
|
|
578 edit_history_add_hist (line); |
|
1
|
579 } |
|
|
580 |
|
|
581 file.close (); |
|
|
582 |
|
1358
|
583 // Turn on command echo, so the output from this will make better |
|
|
584 // sense. |
|
1
|
585 |
|
|
586 begin_unwind_frame ("do_edit_history"); |
|
1588
|
587 unwind_protect_int (user_pref.echo_executing_commands); |
|
168
|
588 unwind_protect_int (input_from_tmp_history_file); |
|
1588
|
589 user_pref.echo_executing_commands = ECHO_CMD_LINE; |
|
168
|
590 input_from_tmp_history_file = 1; |
|
1
|
591 |
|
|
592 parse_and_execute (name, 1); |
|
|
593 |
|
|
594 run_unwind_frame ("do_edit_history"); |
|
|
595 |
|
1358
|
596 // Delete the temporary file. Should probably be done with an |
|
|
597 // unwind_protect. |
|
1
|
598 |
|
1755
|
599 unlink (name.c_str ()); |
|
1
|
600 } |
|
|
601 |
|
1755
|
602 static void |
|
|
603 do_run_history (int argc, const string_vector& argv) |
|
64
|
604 { |
|
1755
|
605 string name = mk_tmp_hist_file (argc, argv, 1, "run_history"); |
|
64
|
606 |
|
1755
|
607 if (name.empty ()) |
|
64
|
608 return; |
|
|
609 |
|
1358
|
610 // Turn on command echo, so the output from this will make better |
|
|
611 // sense. |
|
64
|
612 |
|
|
613 begin_unwind_frame ("do_run_history"); |
|
1588
|
614 unwind_protect_int (user_pref.echo_executing_commands); |
|
168
|
615 unwind_protect_int (input_from_tmp_history_file); |
|
1588
|
616 user_pref.echo_executing_commands = ECHO_CMD_LINE; |
|
168
|
617 input_from_tmp_history_file = 1; |
|
64
|
618 |
|
|
619 parse_and_execute (name, 1); |
|
|
620 |
|
|
621 run_unwind_frame ("do_run_history"); |
|
|
622 |
|
1358
|
623 // Delete the temporary file. Should probably be done with an |
|
|
624 // unwind_protect. |
|
64
|
625 |
|
1755
|
626 unlink (name.c_str ()); |
|
64
|
627 } |
|
|
628 |
|
1
|
629 int |
|
|
630 current_history_number (void) |
|
|
631 { |
|
|
632 using_history (); |
|
|
633 |
|
1646
|
634 if (user_pref.history_size > 0) |
|
1
|
635 return history_base + where_history (); |
|
|
636 else |
|
|
637 return -1; |
|
|
638 |
|
|
639 } |
|
|
640 |
|
1488
|
641 DEFUN_TEXT ("edit_history", Fedit_history, Sedit_history, 10, |
|
529
|
642 "edit_history [first] [last]\n\ |
|
|
643 \n\ |
|
|
644 edit commands from the history list") |
|
|
645 { |
|
|
646 Octave_object retval; |
|
|
647 |
|
1755
|
648 int argc = args.length () + 1; |
|
|
649 |
|
|
650 string_vector argv = make_argv (args, "edit_history"); |
|
|
651 |
|
|
652 if (error_state) |
|
|
653 return retval; |
|
529
|
654 |
|
|
655 do_edit_history (argc, argv); |
|
|
656 |
|
|
657 return retval; |
|
|
658 } |
|
|
659 |
|
1488
|
660 DEFUN_TEXT ("history", Fhistory, Shistory, 10, |
|
529
|
661 "history [N] [-w file] [-r file] [-q]\n\ |
|
|
662 \n\ |
|
|
663 display, save, or load command history") |
|
|
664 { |
|
|
665 Octave_object retval; |
|
|
666 |
|
1755
|
667 int argc = args.length () + 1; |
|
|
668 |
|
|
669 string_vector argv = make_argv (args, "history"); |
|
|
670 |
|
|
671 if (error_state) |
|
|
672 return retval; |
|
529
|
673 |
|
|
674 do_history (argc, argv); |
|
|
675 |
|
|
676 return retval; |
|
|
677 } |
|
|
678 |
|
1488
|
679 DEFUN_TEXT ("run_history", Frun_history, Srun_history, 10, |
|
529
|
680 "run_history [first] [last]\n\ |
|
|
681 \n\ |
|
|
682 run commands from the history list") |
|
|
683 { |
|
|
684 Octave_object retval; |
|
|
685 |
|
1755
|
686 int argc = args.length () + 1; |
|
|
687 |
|
|
688 string_vector argv = make_argv (args, "run_history"); |
|
|
689 |
|
|
690 if (error_state) |
|
|
691 return retval; |
|
529
|
692 |
|
|
693 do_run_history (argc, argv); |
|
|
694 |
|
|
695 return retval; |
|
|
696 } |
|
|
697 |
|
1
|
698 /* |
|
|
699 ;;; Local Variables: *** |
|
|
700 ;;; mode: C++ *** |
|
|
701 ;;; page-delimiter: "^/\\*" *** |
|
|
702 ;;; End: *** |
|
|
703 */ |
