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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 #if !defined (octave_fn_cache_h) |
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24 #define octave_fn_cache_h 1 |
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25 |
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26 #include <string> |
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27 #include <map> |
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28 |
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29 #include "oct-time.h" |
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30 |
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31 class string_vector; |
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32 |
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33 // XXX FIXME XXX -- this should maybe be nested in the |
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34 // octave_fcn_file_name_cache class... |
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35 |
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36 class |
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37 file_name_cache_elt |
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38 { |
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39 public: |
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40 |
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41 file_name_cache_elt (void) |
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42 : timestamp (static_cast<time_t> (0)), fcn_file_names (), |
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43 fcn_file_names_no_suffix () |
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44 { update (std::string ()); } |
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45 |
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46 file_name_cache_elt (const std::string& dir_name) |
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47 : timestamp (static_cast<time_t> (0)), fcn_file_names (), |
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48 fcn_file_names_no_suffix () |
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49 { update (dir_name); } |
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50 |
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51 file_name_cache_elt (const file_name_cache_elt& elt) |
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52 { |
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53 timestamp = elt.timestamp; |
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54 fcn_file_names = elt.fcn_file_names; |
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55 fcn_file_names_no_suffix = elt.fcn_file_names_no_suffix; |
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56 } |
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57 |
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58 file_name_cache_elt& operator = (const file_name_cache_elt& elt) |
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59 { |
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60 if (&elt != this) |
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61 { |
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62 timestamp = elt.timestamp; |
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63 fcn_file_names = elt.fcn_file_names; |
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64 fcn_file_names_no_suffix = elt.fcn_file_names_no_suffix; |
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65 } |
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66 return *this; |
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67 } |
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68 |
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69 ~file_name_cache_elt (void) { } |
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70 |
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71 int length (void) { return fcn_file_names.length (); } |
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72 |
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73 bool update (const std::string& dir_name); |
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74 |
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75 // The time we last read this directory. |
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76 octave_time timestamp; |
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77 |
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78 // The list of file names in this directory. |
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79 string_vector fcn_file_names; |
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80 |
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81 // The list of file names in this directory without the .m or .oct |
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82 // suffixes. |
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83 string_vector fcn_file_names_no_suffix; |
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84 }; |
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85 |
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86 class |
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87 octave_fcn_file_name_cache |
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88 { |
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89 protected: |
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90 |
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91 octave_fcn_file_name_cache (void) : cache () { update (std::string ()); } |
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92 |
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93 public: |
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94 |
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95 ~octave_fcn_file_name_cache (void) { } |
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96 |
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97 bool update (const std::string& path); |
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98 |
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99 static string_vector list (bool no_suffix = false) |
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100 { return list (std::string (), no_suffix); } |
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101 |
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102 static string_vector list (const std::string& path, bool no_suffix = false); |
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103 |
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104 static string_vector list_no_suffix (void) |
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105 { return list (true); } |
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106 |
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107 static string_vector list_no_suffix (const std::string& path) |
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108 { return list (path, true); } |
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109 |
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110 private: |
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111 |
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112 static octave_fcn_file_name_cache* instance; |
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113 |
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114 // An associative array of all the directory names in the load path |
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115 // and the corresponding cache elements. |
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116 std::map<std::string, file_name_cache_elt> cache; |
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117 |
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118 string_vector do_list (const std::string& path, bool no_suffix); |
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119 }; |
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120 |
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121 #endif |
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122 |
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123 /* |
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124 ;;; Local Variables: *** |
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125 ;;; mode: C++ *** |
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126 ;;; End: *** |
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127 */ |
