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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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
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20 02110-1301, USA. |
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21 |
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22 */ |
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23 |
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24 #if !defined (octave_fn_cache_h) |
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25 #define octave_fn_cache_h 1 |
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26 |
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27 #include <string> |
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28 #include <map> |
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29 |
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30 #include "oct-time.h" |
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31 |
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32 class string_vector; |
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33 |
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34 // FIXME -- this should maybe be nested in the |
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35 // octave_fcn_file_name_cache class... |
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36 |
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37 class |
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38 file_name_cache_elt |
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39 { |
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40 public: |
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41 |
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42 file_name_cache_elt (void) |
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43 : timestamp (static_cast<time_t> (0)), fcn_file_names (), |
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44 fcn_file_names_no_suffix () |
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45 { update (std::string ()); } |
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46 |
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47 file_name_cache_elt (const std::string& dir_name) |
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48 : timestamp (static_cast<time_t> (0)), fcn_file_names (), |
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49 fcn_file_names_no_suffix () |
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50 { update (dir_name); } |
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51 |
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52 file_name_cache_elt (const file_name_cache_elt& elt) |
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53 { |
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54 timestamp = elt.timestamp; |
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55 fcn_file_names = elt.fcn_file_names; |
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56 fcn_file_names_no_suffix = elt.fcn_file_names_no_suffix; |
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57 } |
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58 |
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59 file_name_cache_elt& operator = (const file_name_cache_elt& elt) |
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60 { |
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61 if (&elt != this) |
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62 { |
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63 timestamp = elt.timestamp; |
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64 fcn_file_names = elt.fcn_file_names; |
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65 fcn_file_names_no_suffix = elt.fcn_file_names_no_suffix; |
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66 } |
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67 return *this; |
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68 } |
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69 |
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70 ~file_name_cache_elt (void) { } |
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71 |
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72 int length (void) { return fcn_file_names.length (); } |
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73 |
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74 bool update (const std::string& dir_name); |
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75 |
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76 // The time we last read this directory. |
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77 octave_time timestamp; |
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78 |
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79 // The list of file names in this directory. |
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80 string_vector fcn_file_names; |
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81 |
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82 // The list of file names in this directory without the .m or .oct |
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83 // suffixes. |
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84 string_vector fcn_file_names_no_suffix; |
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85 }; |
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86 |
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87 class |
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88 octave_fcn_file_name_cache |
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89 { |
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90 protected: |
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91 |
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92 octave_fcn_file_name_cache (void) : cache () { update (std::string ()); } |
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93 |
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94 public: |
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95 |
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96 ~octave_fcn_file_name_cache (void) { } |
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97 |
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98 bool update (const std::string& path); |
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99 |
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100 static string_vector list (bool no_suffix = false) |
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101 { return list (std::string (), no_suffix); } |
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102 |
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103 static string_vector list (const std::string& path, bool no_suffix = false); |
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104 |
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105 static string_vector list_no_suffix (void) |
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106 { return list (true); } |
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107 |
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108 static string_vector list_no_suffix (const std::string& path) |
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109 { return list (path, true); } |
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110 |
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111 private: |
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112 |
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113 static octave_fcn_file_name_cache* instance; |
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114 |
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115 // An associative array of all the directory names in the load path |
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116 // and the corresponding cache elements. |
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117 std::map<std::string, file_name_cache_elt> cache; |
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118 |
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119 string_vector do_list (const std::string& path, bool no_suffix); |
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120 }; |
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121 |
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122 #endif |
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123 |
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124 /* |
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125 ;;; Local Variables: *** |
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126 ;;; mode: C++ *** |
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127 ;;; End: *** |
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128 */ |
