Mercurial > octave-nkf
annotate liboctave/util/pathsearch.h @ 20595:c1a6c31ac29a
eliminate more simple uses of error_state
* ov-classdef.cc: Eliminate simple uses of error_state.
| author | John W. Eaton <jwe@octave.org> |
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| date | Tue, 06 Oct 2015 00:20:02 -0400 |
| parents | 4197fc428c7d |
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| rev | line source |
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| 1786 | 1 /* |
| 2 | |
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3 Copyright (C) 1996-2015 John W. Eaton |
| 1786 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 1786 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 1786 | 20 |
| 21 */ | |
| 22 | |
| 23 #if !defined (octave_pathsearch_h) | |
| 24 #define octave_pathsearch_h 1 | |
| 25 | |
| 26 #include <string> | |
| 27 | |
| 28 #include "str-vec.h" | |
| 29 | |
| 30 class | |
| 6108 | 31 OCTAVE_API |
| 1786 | 32 dir_path |
| 33 { | |
| 34 public: | |
| 35 | |
| 3504 | 36 dir_path (const std::string& s = std::string (), |
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37 const std::string& d = std::string ()) |
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38 : p_orig (s), p_default (d), initialized (false), p (), pv () |
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39 { |
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40 if (! p_orig.empty ()) |
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41 init (); |
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42 } |
| 1786 | 43 |
| 44 dir_path (const dir_path& dp) | |
| 3196 | 45 : p_orig (dp.p_orig), p_default (dp.p_default), |
| 46 initialized (dp.initialized), p (dp.p), pv (dp.pv) | |
| 3174 | 47 { } |
| 1786 | 48 |
| 49 dir_path& operator = (const dir_path& dp) | |
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50 { |
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51 p_orig = dp.p_orig; |
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52 p_default = dp.p_default; |
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53 initialized = dp.initialized; |
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54 p = dp.p; |
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55 pv = dp.pv; |
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56 return *this; |
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57 } |
| 1786 | 58 |
| 59 ~dir_path (void) { } | |
| 60 | |
| 3504 | 61 void set (const std::string& s) |
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62 { |
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63 initialized = false; |
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64 p_orig = s; |
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65 init (); |
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66 } |
| 1786 | 67 |
| 68 string_vector elements (void); | |
| 69 string_vector all_directories (void); | |
| 70 | |
| 3504 | 71 std::string find_first (const std::string&); |
| 72 std::string find (const std::string& nm) { return find_first (nm); } | |
| 1786 | 73 |
| 3504 | 74 string_vector find_all (const std::string&); |
| 1786 | 75 |
| 4242 | 76 std::string find_first_of (const string_vector& names); |
| 77 string_vector find_all_first_of (const string_vector& names); | |
| 78 | |
| 3185 | 79 void rehash (void) |
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80 { |
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81 initialized = false; |
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82 init (); |
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83 } |
| 3185 | 84 |
| 8010 | 85 static char path_sep_char (void) |
| 86 { | |
| 87 return static_members::path_sep_char (); | |
| 88 } | |
| 89 | |
| 9266 | 90 static void path_sep_char (char c) |
| 91 { | |
| 92 static_members::path_sep_char (c); | |
| 93 } | |
| 94 | |
| 8010 | 95 static std::string path_sep_str (void) |
| 96 { | |
| 97 return static_members::path_sep_str (); | |
| 98 } | |
| 99 | |
| 100 static bool is_path_sep (char c) { return c == path_sep_char (); } | |
| 101 | |
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102 private: |
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103 |
| 8010 | 104 // The colon separated list that we were given. |
| 105 std::string p_orig; | |
| 106 | |
| 107 // The default path. If specified, replaces leading, trailing, or | |
| 108 // doubled colons in p_orig. | |
| 109 std::string p_default; | |
| 110 | |
| 111 // TRUE means we've unpacked p. | |
| 112 bool initialized; | |
| 113 | |
| 114 // A version of the colon separate list on which we have performed | |
| 115 // tilde, variable, and possibly default path expansion. | |
| 116 std::string p; | |
| 117 | |
| 118 // The elements of the list. | |
| 119 string_vector pv; | |
| 120 | |
| 121 void init (void); | |
| 122 | |
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123 // Use a singleton class for these data members instead of just |
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124 // making them static members of the dir_path class so that we can |
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125 // ensure proper initialization. |
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126 |
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127 class OCTAVE_API static_members |
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128 { |
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129 public: |
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130 |
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131 static_members (void); |
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132 |
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133 static char path_sep_char (void) |
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134 { |
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135 return instance_ok () ? instance->xpath_sep_char : 0; |
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136 } |
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137 |
| 9266 | 138 static void path_sep_char (char c) |
| 139 { | |
| 140 if (instance_ok ()) | |
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141 { |
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142 instance->xpath_sep_char = c; |
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143 instance->xpath_sep_str = std::string (1, c); |
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144 } |
| 9266 | 145 } |
| 146 | |
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147 static std::string path_sep_str (void) |
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148 { |
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149 return instance_ok () ? instance->xpath_sep_str : std::string (); |
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150 } |
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151 |
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152 private: |
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153 |
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154 static static_members *instance; |
| 5777 | 155 |
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156 static void cleanup_instance (void) { delete instance; instance = 0; } |
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157 |
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158 static bool instance_ok (void); |
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159 |
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160 // No copying! |
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161 |
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162 static_members (const static_members&); |
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163 |
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164 static_members& operator = (const static_members&); |
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165 |
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166 char xpath_sep_char; |
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167 |
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168 std::string xpath_sep_str; |
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169 }; |
| 1786 | 170 }; |
| 171 | |
| 172 #endif |