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00048 #ifndef PLATFORMSTL_INCL_PLATFORMSTL_FILESYSTEM_HPP_CWD_STACK
00049 #define PLATFORMSTL_INCL_PLATFORMSTL_FILESYSTEM_HPP_CWD_STACK
00050
00051
00052 #ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
00053 # define PLATFORMSTL_VER_PLATFORMSTL_FILESYSTEM_HPP_CWD_STACK_MAJOR 2
00054 # define PLATFORMSTL_VER_PLATFORMSTL_FILESYSTEM_HPP_CWD_STACK_MINOR 1
00055 # define PLATFORMSTL_VER_PLATFORMSTL_FILESYSTEM_HPP_CWD_STACK_REVISION 5
00056 # define PLATFORMSTL_VER_PLATFORMSTL_FILESYSTEM_HPP_CWD_STACK_EDIT 25
00057 #endif
00058
00059
00060
00061
00062
00063 #ifndef PLATFORMSTL_INCL_PLATFORMSTL_FILESYSTEM_HPP_PLATFORMSTL
00064 # include <platformstl/platformstl.hpp>
00065 #endif
00066 #ifndef PLATFORMSTL_INCL_PLATFORMSTL_ERROR_HPP_EXCEPTIONS
00067 # include <platformstl/error/exceptions.hpp>
00068 #endif
00069 #ifndef PLATFORMSTL_INCL_PLATFORMSTL_FILESYSTEM_HPP_CURRENT_DIRECTORY
00070 # include <platformstl/filesystem/current_directory.hpp>
00071 #endif
00072 #ifndef PLATFORMSTL_INCL_PLATFORMSTL_FILESYSTEM_HPP_FILESYSTEM_TRAITS
00073 # include <platformstl/filesystem/filesystem_traits.hpp>
00074 #endif
00075 #ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_SIMPLE_STRING
00076 # include <stlsoft/string/simple_string.hpp>
00077 #endif
00078
00079 #ifndef STLSOFT_INCL_STACK
00080 # define STLSOFT_INCL_STACK
00081 # include <stack>
00082 #endif
00083
00084
00085
00086
00087
00088 #if defined(_STLSOFT_NO_NAMESPACE) || \
00089 defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
00090
00091 namespace platformstl
00092 {
00093 #else
00094
00095
00096 namespace stlsoft
00097 {
00098
00099 namespace platformstl_project
00100 {
00101 #endif
00102
00103
00104
00105
00106
00113 template< typename C
00114 #ifdef STLSOFT_CF_EXCEPTION_SUPPORT
00115 , typename XP = platformstl::platform_exception_policy
00116 #else
00117 , typename XP = stlsoft::nothrow_exception_policy
00118 #endif
00119 >
00120 class basic_cwd_stack
00121 {
00122 public:
00123 typedef C char_type;
00124 typedef XP exception_policy_type;
00125 typedef stlsoft::basic_simple_string<C> string_type;
00126 typedef bool bool_type;
00127 typedef stlsoft_ns_qual(ss_size_t) size_type;
00128 private:
00129 typedef filesystem_traits<C> traits_type;
00130 typedef std::stack<string_type> stack_type;
00131
00132 public:
00133 string_type const &top() const;
00134
00135 void push(string_type const& directory);
00138 void pop();
00139
00143 bool_type try_pop();
00144
00145 public:
00147 bool_type empty() const;
00151 bool_type is_empty() const;
00153 size_type size() const;
00154
00155 private:
00156 string_type const &translate_environment_(string_type const& directory, string_type &trueDirectory);
00157
00158 private:
00159 stack_type m_stack;
00160
00161
00162
00163 #if 0
00164 struct directory
00165 {
00166 string_type path;
00167 file_handle handle;
00168 };
00169 #endif
00170 };
00171
00172
00173
00174
00175
00176 typedef basic_cwd_stack<ss_char_a_t> cwd_stack_a;
00177 typedef basic_cwd_stack<ss_char_w_t> cwd_stack_w;
00178 typedef basic_cwd_stack<ss_char_a_t> cwd_stack;
00179
00180
00181
00182
00183
00184 #ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
00185
00186 template <typename C, typename XP>
00187 inline ss_typename_type_ret_k basic_cwd_stack<C, XP>::string_type const& basic_cwd_stack<C, XP>::translate_environment_(ss_typename_type_k basic_cwd_stack<C, XP>::string_type const& directory, ss_typename_type_k basic_cwd_stack<C, XP>::string_type &trueDirectory)
00188 {
00189 if(directory.end() != std::find(directory.begin(), directory.end(), '%'))
00190 {
00191 stlsoft::auto_buffer<char_type> buffer(1 + traits_type::expand_environment_strings(directory.c_str(), NULL, 0));
00192 const stlsoft_ns_qual(ss_size_t) cch = traits_type::expand_environment_strings(directory.c_str(), &buffer[0], buffer.size());
00193
00194 trueDirectory.assign(buffer.data(), cch);
00195
00196 return trueDirectory;
00197 }
00198
00199 return directory;
00200 }
00201
00202
00203 template <typename C, typename XP>
00204 inline ss_typename_type_ret_k basic_cwd_stack<C, XP>::size_type basic_cwd_stack<C, XP>::size() const
00205 {
00206 return m_stack.size();
00207 }
00208
00209 template <typename C, typename XP>
00210 inline ss_typename_type_ret_k basic_cwd_stack<C, XP>::bool_type basic_cwd_stack<C, XP>::empty() const
00211 {
00212 return 0 == size();
00213 }
00214
00215 template <typename C, typename XP>
00216 inline ss_typename_type_ret_k basic_cwd_stack<C, XP>::bool_type basic_cwd_stack<C, XP>::is_empty() const
00217 {
00218 return empty();
00219 }
00220
00221 template <typename C, typename XP>
00222 inline void basic_cwd_stack<C, XP>::push(ss_typename_type_k basic_cwd_stack<C, XP>::string_type const& directory)
00223 {
00224 stlsoft::auto_buffer<char_type> buffer(1 + traits_type::get_current_directory(static_cast<char_type*>(NULL), 0));
00225 const stlsoft_ns_qual(ss_size_t) cch = traits_type::get_current_directory(&buffer[0], buffer.size());
00226
00227 string_type cwd(buffer.data(), cch);
00228 string_type trueDirectory;
00229
00230 m_stack.push(cwd);
00231
00232 if(!traits_type::set_current_directory(translate_environment_(directory, trueDirectory).c_str()))
00233 {
00234 m_stack.pop();
00235
00236 exception_policy_type xp;
00237
00238 xp("Failed to change directory", traits_type::get_last_error());
00239 }
00240 }
00241
00242 template <typename C, typename XP>
00243 inline void basic_cwd_stack<C, XP>::pop()
00244 {
00245 STLSOFT_ASSERT(!empty());
00246
00247 const string_type directory = m_stack.top();
00248
00249 m_stack.pop();
00250
00251 if(!traits_type::set_current_directory(directory.c_str()))
00252 {
00253 exception_policy_type xp;
00254
00255 xp("Failed to restore directory", traits_type::get_last_error());
00256 }
00257 }
00258
00259 template <typename C, typename XP>
00260 inline ss_typename_type_ret_k basic_cwd_stack<C, XP>::bool_type basic_cwd_stack<C, XP>::try_pop()
00261 {
00262 STLSOFT_ASSERT(!empty());
00263
00264 string_type const &directory = m_stack.top();
00265
00266 if(!traits_type::set_current_directory(directory.c_str()))
00267 {
00268 return false;
00269 }
00270 else
00271 {
00272 m_stack.pop();
00273
00274 return true;
00275 }
00276 }
00277
00278 #endif
00279
00280
00281
00282 #if defined(_STLSOFT_NO_NAMESPACE) || \
00283 defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
00284 }
00285 #else
00286 }
00287 }
00288 #endif
00289
00290
00291
00292 #endif
00293
00294