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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 John W. Eaton |
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4 |
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5 This file is part of Octave. |
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6 |
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7 Octave is free software; you can redistribute it and/or modify it |
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8 under the terms of the GNU General Public License as published by the |
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9 Free Software Foundation; either version 2, or (at your option) any |
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10 later version. |
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11 |
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12 Octave is distributed in the hope that it will be useful, but WITHOUT |
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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15 for more details. |
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16 |
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17 You should have received a copy of the GNU General Public License |
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18 along with Octave; see the file COPYING. If not, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #ifdef HAVE_CONFIG_H |
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24 #include <config.h> |
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25 #endif |
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26 |
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27 #include <cstring> |
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28 |
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29 #include <strstream.h> |
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30 |
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31 #ifdef HAVE_FCNTL_H |
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32 #include <fcntl.h> |
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33 #endif |
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34 |
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35 #ifdef HAVE_UNISTD_H |
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36 #ifdef HAVE_SYS_TYPES_H |
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37 #include <sys/types.h> |
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38 #endif |
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39 #include <unistd.h> |
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40 #endif |
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41 |
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42 #include <readline/history.h> |
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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) |
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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 if (s.empty () |
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123 || (s.length () == 1 && (s[0] == '\r' || s[0] == '\n'))) |
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124 return; |
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125 |
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126 ::add_history (s.c_str ()); |
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127 lines_this_session++; |
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128 } |
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129 } |
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130 |
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131 void |
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132 command_history::remove (int n) |
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133 { |
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134 HIST_ENTRY *discard = ::remove_history (n); |
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135 |
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136 if (discard) |
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137 { |
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138 if (discard->line) |
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139 ::free (discard->line); |
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140 |
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141 ::free (discard); |
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142 } |
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143 } |
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144 |
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145 int |
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146 command_history::where (void) |
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147 { |
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148 return ::where_history (); |
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149 } |
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150 |
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151 int |
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152 command_history::base (void) |
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153 { |
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154 return ::history_base; |
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155 } |
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156 |
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157 int |
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158 command_history::current_number (void) |
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159 { |
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160 return (xsize > 0) ? base () + where () : -1; |
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161 } |
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162 |
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163 void |
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164 command_history::stifle (int n) |
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165 { |
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166 ::stifle_history (n); |
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167 } |
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168 |
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169 int |
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170 command_history::unstifle (void) |
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171 { |
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172 return ::unstifle_history (); |
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173 } |
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174 |
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175 int |
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176 command_history::is_stifled (void) |
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177 { |
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178 return ::history_is_stifled (); |
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179 } |
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180 |
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181 void |
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182 command_history::read (bool must_exist) |
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183 { |
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184 read (xfile, must_exist); |
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185 } |
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186 |
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187 void |
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188 command_history::read (const string& f, bool must_exist) |
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189 { |
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190 if (! f.empty ()) |
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191 { |
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192 int status = ::read_history (f.c_str ()); |
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193 |
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194 if (status != 0 && must_exist) |
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195 error (status); |
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196 else |
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197 { |
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198 lines_in_file = where (); |
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199 |
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200 ::using_history (); |
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201 } |
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202 } |
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203 else |
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204 error ("command_history::read: missing file name"); |
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205 } |
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206 |
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207 void |
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208 command_history::read_range (int from, int to, bool must_exist) |
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209 { |
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210 read_range (xfile, from, to, must_exist); |
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211 } |
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212 |
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213 void |
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214 command_history::read_range (const string& f, int from, int to, |
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215 bool must_exist) |
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216 { |
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217 if (from < 0) |
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218 from = lines_in_file; |
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219 |
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220 if (! f.empty ()) |
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221 { |
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222 int status = ::read_history_range (f.c_str (), from, to); |
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223 |
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224 if (status != 0 && must_exist) |
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225 error (status); |
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226 else |
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227 { |
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228 lines_in_file = where (); |
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229 |
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230 ::using_history (); |
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231 } |
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232 } |
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233 else |
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234 error ("command_history::read_range: missing file name"); |
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235 } |
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236 |
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237 void |
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238 command_history::write (const string& f_arg) |
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239 { |
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240 string f = f_arg; |
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241 |
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242 if (f.empty ()) |
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243 f = xfile; |
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244 |
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245 if (! f.empty ()) |
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246 { |
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247 int status = ::write_history (f.c_str ()); |
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248 |
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249 if (status != 0) |
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250 error (status); |
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251 } |
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252 else |
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253 error ("command_history::write: missing file name"); |
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254 } |
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255 |
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256 void |
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257 command_history::append (const string& f_arg) |
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258 { |
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259 if (lines_this_session) |
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260 { |
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261 if (lines_this_session < where ()) |
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262 { |
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263 // Create file if it doesn't already exist. |
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264 |
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265 string f = f_arg; |
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266 |
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267 if (f.empty ()) |
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268 f = xfile; |
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269 |
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270 if (! f.empty ()) |
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271 { |
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272 file_stat fs (f); |
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273 |
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274 if (! fs) |
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275 { |
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276 int tem; |
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277 |
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278 tem = open (f.c_str (), O_CREAT, 0666); |
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279 close (tem); |
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280 } |
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281 |
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282 int status = ::append_history (lines_this_session, f.c_str ()); |
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283 |
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284 if (status != 0) |
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285 error (status); |
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286 else |
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287 lines_in_file += lines_this_session; |
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288 |
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289 lines_this_session = 0; |
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290 } |
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291 else |
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292 error ("comman_history::append: missing file name"); |
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293 } |
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294 } |
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295 } |
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296 |
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297 void |
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298 command_history::truncate_file (const string& f_arg, int n) |
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299 { |
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300 string f = f_arg; |
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301 |
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302 if (f.empty ()) |
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303 f = xfile; |
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304 |
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305 if (! f.empty ()) |
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306 ::history_truncate_file (f.c_str (), n); |
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307 else |
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308 error ("command_history::truncate_file: missing file name"); |
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309 } |
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310 |
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311 string_vector |
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312 command_history::list (int limit, int number_lines) |
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313 { |
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314 string_vector retval; |
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315 |
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316 if (limit) |
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317 { |
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318 HIST_ENTRY **hlist = ::history_list (); |
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319 |
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320 if (hlist) |
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321 { |
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322 int end = 0; |
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323 while (hlist[end]) |
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324 end++; |
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325 |
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326 int beg = (limit < 0 || end < limit) ? 0 : (end - limit); |
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327 |
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328 retval.resize (end - beg); |
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329 |
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330 int k = 0; |
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331 for (int i = beg; i < end; i++) |
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332 { |
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333 ostrstream output_buf; |
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334 |
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335 if (number_lines) |
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336 output_buf.form ("%5d%c", i + ::history_base, |
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337 hlist[i]->data ? '*' : ' '); |
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338 |
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339 output_buf << hlist[i]->line << ends; |
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340 |
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341 const char *tmp = output_buf.str (); |
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342 |
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343 retval[k++] = tmp; |
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344 |
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345 delete [] tmp; |
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346 } |
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347 } |
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348 } |
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349 |
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350 return retval; |
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351 } |
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352 |
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353 string |
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354 command_history::get_entry (int n) |
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355 { |
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356 string retval; |
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357 |
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358 HIST_ENTRY *entry = ::history_get (::history_base + n); |
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359 |
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360 if (entry && entry->line) |
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361 retval = entry->line; |
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362 |
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363 return retval; |
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364 } |
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365 |
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366 void |
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367 command_history::replace_entry (int which, const string& line) |
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368 { |
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369 HIST_ENTRY *discard = ::replace_history_entry (which, line.c_str (), 0); |
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370 |
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371 if (discard) |
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372 { |
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373 if (discard->line) |
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374 ::free (discard->line); |
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375 |
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376 ::free (discard); |
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377 } |
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378 } |
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379 |
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380 void |
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381 command_history::clean_up_and_save (const string& f_arg, int n) |
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382 { |
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383 string f = f_arg; |
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384 |
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385 if (f.empty ()) |
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386 f = xfile; |
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387 |
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388 if (! f.empty ()) |
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389 { |
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390 if (n < 0) |
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391 n = xsize; |
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392 |
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393 stifle (n); |
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394 |
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395 ::write_history (f.c_str ()); |
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396 } |
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397 else |
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398 error ("command_history::clean_up_and_save: missing file name"); |
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399 } |
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400 |
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401 void |
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402 command_history::error (int err_num) |
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403 { |
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404 (*current_liboctave_error_handler) ("%s", strerror (err_num)); |
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405 } |
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406 |
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407 void |
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408 command_history::error (const string& s) |
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409 { |
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410 (*current_liboctave_error_handler) ("%s", s.c_str ()); |
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411 } |
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412 |
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413 /* |
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414 ;;; Local Variables: *** |
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415 ;;; mode: C++ *** |
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416 ;;; End: *** |
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417 */ |
