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1 // cmd-hist.cc -*- C++ -*- |
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2 /* |
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3 |
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4 Copyright (C) 1996 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 */ |
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23 |
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24 #ifdef HAVE_CONFIG_H |
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25 #include <config.h> |
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26 #endif |
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27 |
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28 #include <cstring> |
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29 |
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30 #include <strstream.h> |
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31 |
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32 #include <fcntl.h> |
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33 |
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34 #ifdef HAVE_UNISTD_H |
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35 #include <sys/types.h> |
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36 #include <unistd.h> |
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37 #endif |
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38 |
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39 extern "C" |
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40 { |
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41 #include <readline/history.h> |
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42 } |
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43 |
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44 #include "file-ops.h" |
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45 #include "lo-error.h" |
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46 #include "cmd-hist.h" |
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47 |
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48 bool command_history::initialized = false; |
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49 |
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50 command_history::command_history (const string& f, int n) |
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51 { |
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52 if (initialized) |
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53 error ("only one history object can be active at once"); |
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54 else |
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55 { |
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56 ignoring_additions = false; |
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57 |
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58 lines_in_file = 0; |
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59 lines_this_session = 0; |
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60 |
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61 xsize = -1; |
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62 |
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63 if (! f.empty ()) |
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64 { |
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65 xfile = f; |
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66 |
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67 read_history (f.c_str ()); |
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68 |
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69 lines_in_file = where (); |
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70 |
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71 using_history (); |
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72 } |
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73 |
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74 if (n > 0) |
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75 xsize = n; |
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76 |
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77 initialized = true; |
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78 } |
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79 } |
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80 |
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81 void |
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82 command_history::set_file (const string& f) |
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83 { |
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84 xfile = f; |
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85 } |
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86 |
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87 string |
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88 command_history::file (void) |
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89 { |
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90 return xfile; |
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91 } |
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92 |
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93 void |
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94 command_history::set_size (int n) |
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95 { |
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96 xsize = n; |
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97 } |
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98 |
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99 int |
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100 command_history::size (void) |
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101 { |
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102 return xsize; |
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103 } |
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104 |
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105 void |
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106 command_history::ignore_entries (bool flag = true) |
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107 { |
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108 ignoring_additions = flag; |
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109 } |
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110 |
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111 bool |
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112 command_history::ignoring_entries (void) |
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113 { |
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114 return ignoring_additions; |
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115 } |
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116 |
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117 void |
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118 command_history::add (const string& s) |
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119 { |
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120 if (! ignoring_entries ()) |
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121 { |
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122 add_history (s.c_str ()); |
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123 lines_this_session++; |
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124 } |
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125 } |
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126 |
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127 void |
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128 command_history::remove (int n) |
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129 { |
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130 HIST_ENTRY *discard = remove_history (n); |
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131 |
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132 if (discard) |
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133 { |
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134 if (discard->line) |
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135 free (discard->line); |
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136 |
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137 free (discard); |
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138 } |
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139 } |
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140 |
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141 int |
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142 command_history::where (void) |
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143 { |
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144 return where_history (); |
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145 } |
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146 |
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147 int |
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148 command_history::base (void) |
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149 { |
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150 return history_base; |
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151 } |
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152 |
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153 int |
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154 command_history::current_number (void) |
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155 { |
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156 return (xsize > 0) ? base () + where () : -1; |
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157 } |
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158 |
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159 void |
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160 command_history::stifle (int n) |
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161 { |
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162 stifle_history (n); |
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163 } |
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164 |
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165 int |
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166 command_history::unstifle (void) |
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167 { |
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168 return unstifle_history (); |
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169 } |
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170 |
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171 int |
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172 command_history::is_stifled (void) |
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173 { |
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174 return history_is_stifled (); |
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175 } |
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176 |
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177 void |
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178 command_history::read (const string& f_arg) |
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179 { |
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180 string f = f_arg; |
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181 |
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182 if (f.empty ()) |
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183 f = xfile; |
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184 |
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185 if (! f.empty ()) |
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186 { |
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187 int status = read_history (f.c_str ()); |
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188 |
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189 if (status != 0) |
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190 error (status); |
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191 else |
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192 using_history (); |
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193 } |
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194 else |
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195 error ("command_history::read: missing file name"); |
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196 } |
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197 |
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198 void |
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199 command_history::read_range (const string& f_arg, int from, int to) |
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200 { |
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201 if (from < 0) |
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202 from = lines_in_file; |
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203 |
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204 string f = f_arg; |
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205 |
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206 if (f.empty ()) |
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207 f = xfile; |
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208 |
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209 if (! f.empty ()) |
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210 { |
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211 int status = read_history_range (f.c_str (), from, to); |
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212 |
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213 if (status != 0) |
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214 error (status); |
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215 else |
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216 { |
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217 using_history (); |
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218 lines_in_file = where (); |
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219 } |
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220 } |
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221 else |
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222 error ("command_history::read_range: missing file name"); |
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223 } |
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224 |
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225 void |
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226 command_history::write (const string& f_arg) |
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227 { |
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228 string f = f_arg; |
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229 |
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230 if (f.empty ()) |
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231 f = xfile; |
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232 |
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233 if (! f.empty ()) |
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234 { |
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235 int status = write_history (f.c_str ()); |
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236 |
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237 if (status != 0) |
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238 error (status); |
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239 } |
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240 else |
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241 error ("command_history::write: missing file name"); |
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242 } |
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243 |
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244 void |
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245 command_history::append (const string& f_arg) |
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246 { |
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247 if (lines_this_session) |
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248 { |
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249 if (lines_this_session < where ()) |
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250 { |
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251 // Create file if it doesn't already exist. |
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252 |
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253 string f = f_arg; |
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254 |
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255 if (f.empty ()) |
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256 f = xfile; |
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257 |
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258 if (! f.empty ()) |
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259 { |
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260 file_stat fs (f); |
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261 |
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262 if (! fs) |
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263 { |
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264 int tem; |
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265 |
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266 tem = open (f.c_str (), O_CREAT, 0666); |
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267 close (tem); |
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268 } |
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269 |
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270 int status = append_history (lines_this_session, f.c_str ()); |
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271 |
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272 if (status != 0) |
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273 error (status); |
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274 else |
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275 lines_in_file += lines_this_session; |
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276 |
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277 lines_this_session = 0; |
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278 } |
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279 else |
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280 error ("comman_history::append: missing file name"); |
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281 } |
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282 } |
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283 } |
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284 |
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285 void |
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286 command_history::truncate_file (const string& f_arg, int n) |
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287 { |
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288 string f = f_arg; |
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289 |
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290 if (f.empty ()) |
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291 f = xfile; |
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292 |
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293 if (! f.empty ()) |
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294 history_truncate_file (f.c_str (), n); |
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295 else |
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296 error ("command_history::truncate_file: missing file name"); |
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297 } |
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298 |
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299 string_vector |
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300 command_history::list (int limit, int number_lines) |
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301 { |
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302 string_vector retval; |
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303 |
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304 if (limit) |
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305 { |
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306 HIST_ENTRY **hlist = history_list (); |
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307 |
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308 if (hlist) |
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309 { |
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310 int end = 0; |
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311 while (hlist[end]) |
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312 end++; |
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313 |
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314 int beg = (limit < 0 || end < limit) ? 0 : (end - limit); |
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315 |
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316 retval.resize (end - beg); |
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317 |
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318 int k = 0; |
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319 for (int i = beg; i < end; i++) |
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320 { |
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321 ostrstream output_buf; |
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322 |
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323 if (number_lines) |
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324 output_buf.form ("%5d%c", i + history_base, |
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325 hlist[i]->data ? '*' : ' '); |
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326 |
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327 output_buf << hlist[i]->line << ends; |
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328 |
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329 const char *tmp = output_buf.str (); |
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330 |
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331 retval[k++] = tmp; |
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332 |
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333 delete [] tmp; |
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334 } |
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335 } |
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336 } |
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337 |
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338 return retval; |
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339 } |
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340 |
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341 string |
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342 command_history::get_entry (int n) |
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343 { |
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344 string retval; |
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345 |
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346 HIST_ENTRY *entry = history_get (history_base + n); |
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347 |
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348 if (entry && entry->line) |
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349 retval = entry->line; |
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350 |
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351 return retval; |
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352 } |
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353 |
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354 void |
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355 command_history::replace_entry (int which, const string& line) |
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356 { |
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357 HIST_ENTRY *discard = replace_history_entry (which, line.c_str (), 0); |
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358 |
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359 if (discard) |
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360 { |
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361 if (discard->line) |
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362 free (discard->line); |
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363 |
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364 free (discard); |
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365 } |
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366 } |
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367 |
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368 void |
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369 command_history::clean_up_and_save (const string& f_arg, int n) |
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370 { |
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371 string f = f_arg; |
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372 |
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373 if (f.empty ()) |
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374 f = xfile; |
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375 |
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376 if (! f.empty ()) |
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377 { |
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378 if (n < 0) |
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379 n = xsize; |
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380 |
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381 stifle (n); |
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382 |
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383 write_history (f.c_str ()); |
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384 } |
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385 else |
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386 error ("command_history::clean_up_and_save: missing file name"); |
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387 } |
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388 |
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389 void |
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390 command_history::error (int errno) |
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391 { |
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392 (*current_liboctave_error_handler) ("%s", strerror (errno)); |
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393 } |
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394 |
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395 void |
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396 command_history::error (const string& s) |
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397 { |
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398 (*current_liboctave_error_handler) ("%s", s.c_str ()); |
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399 } |
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400 |
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401 /* |
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402 ;;; Local Variables: *** |
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403 ;;; mode: C++ *** |
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404 ;;; page-delimiter: "^/\\*" *** |
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405 ;;; End: *** |
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406 */ |
