author | hgs |
Tue, 02 Nov 2010 19:23:22 +0530 | |
changeset 79 | 564bc7b7ad27 |
parent 0 | e4d67989cc36 |
permissions | -rw-r--r-- |
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// boost/filesystem/convenience.hpp ----------------------------------------// |
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// Copyright Beman Dawes, 2002-2005 |
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// Copyright Vladimir Prus, 2002 |
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// Use, modification, and distribution is subject to the Boost Software |
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// See library home page at http://www.boost.org/libs/filesystem |
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//----------------------------------------------------------------------------// |
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#ifndef BOOST_FILESYSTEM_CONVENIENCE_HPP |
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#define BOOST_FILESYSTEM_CONVENIENCE_HPP |
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#include <boost/filesystem/operations.hpp> |
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#include <vector> |
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#include <stack> |
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#include <boost/config/abi_prefix.hpp> // must be the last #include |
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# ifndef BOOST_FILESYSTEM_NARROW_ONLY |
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# define BOOST_FS_FUNC(BOOST_FS_TYPE) \ |
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template<class Path> typename boost::enable_if<is_basic_path<Path>, \ |
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BOOST_FS_TYPE>::type |
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# define BOOST_FS_FUNC_STRING BOOST_FS_FUNC(typename Path::string_type) |
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# define BOOST_FS_TYPENAME typename |
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# else |
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# define BOOST_FS_FUNC(BOOST_FS_TYPE) inline BOOST_FS_TYPE |
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typedef boost::filesystem::path Path; |
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# define BOOST_FS_FUNC_STRING std::string |
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# define BOOST_FS_TYPENAME |
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# endif |
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namespace boost |
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{ |
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namespace filesystem |
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{ |
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BOOST_FS_FUNC(bool) create_directories(const Path& ph) |
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{ |
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if (ph.empty() || exists(ph)) |
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{ |
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if ( !ph.empty() && !is_directory(ph) ) |
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boost::throw_exception( basic_filesystem_error<Path>( |
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"boost::filesystem::create_directories", ph, -1 ) ); |
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return false; |
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} |
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// First create branch, by calling ourself recursively |
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create_directories(ph.branch_path()); |
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// Now that parent's path exists, create the directory |
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create_directory(ph); |
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return true; |
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} |
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BOOST_FS_FUNC_STRING extension(const Path& ph) |
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{ |
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typedef BOOST_FS_TYPENAME Path::string_type string_type; |
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string_type leaf = ph.leaf(); |
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BOOST_FS_TYPENAME string_type::size_type n = leaf.rfind('.'); |
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if (n != string_type::npos) |
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return leaf.substr(n); |
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else |
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return string_type(); |
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} |
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BOOST_FS_FUNC_STRING basename(const Path& ph) |
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{ |
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typedef BOOST_FS_TYPENAME Path::string_type string_type; |
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string_type leaf = ph.leaf(); |
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BOOST_FS_TYPENAME string_type::size_type n = leaf.rfind('.'); |
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return leaf.substr(0, n); |
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} |
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BOOST_FS_FUNC(Path) change_extension( const Path & ph, |
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const BOOST_FS_TYPENAME Path::string_type & new_extension ) |
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{ return ph.branch_path() / (basename(ph) + new_extension); } |
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# ifndef BOOST_FILESYSTEM_NARROW_ONLY |
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// "do-the-right-thing" overloads ---------------------------------------// |
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inline bool create_directories(const path& ph) |
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{ return create_directories<path>(ph); } |
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inline bool create_directories(const wpath& ph) |
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{ return create_directories<wpath>(ph); } |
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inline std::string extension(const path& ph) |
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{ return extension<path>(ph); } |
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inline std::wstring extension(const wpath& ph) |
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{ return extension<wpath>(ph); } |
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inline std::string basename(const path& ph) |
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{ return basename<path>( ph ); } |
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inline std::wstring basename(const wpath& ph) |
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{ return basename<wpath>( ph ); } |
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inline path change_extension( const path & ph, const std::string& new_ex ) |
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{ return change_extension<path>( ph, new_ex ); } |
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inline wpath change_extension( const wpath & ph, const std::wstring& new_ex ) |
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{ return change_extension<wpath>( ph, new_ex ); } |
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# endif |
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// basic_recursive_directory_iterator helpers --------------------------// |
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namespace detail |
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{ |
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template< class Path > |
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struct recur_dir_itr_imp |
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{ |
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typedef basic_directory_iterator< Path > element_type; |
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std::stack< element_type, std::vector< element_type > > m_stack; |
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int m_level; |
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bool m_no_push; |
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bool m_no_throw; |
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recur_dir_itr_imp() : m_level(0), m_no_push(false), m_no_throw(false) {} |
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}; |
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} // namespace detail |
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// basic_recursive_directory_iterator ----------------------------------// |
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template< class Path > |
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class basic_recursive_directory_iterator |
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: public boost::iterator_facade< |
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basic_recursive_directory_iterator<Path>, |
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basic_directory_entry<Path>, |
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boost::single_pass_traversal_tag > |
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{ |
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public: |
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typedef Path path_type; |
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basic_recursive_directory_iterator(){} // creates the "end" iterator |
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explicit basic_recursive_directory_iterator( const Path & dir_path ); |
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basic_recursive_directory_iterator( const Path & dir_path, system_error_type & ec ); |
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int level() const { return m_imp->m_level; } |
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void pop(); |
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void no_push() |
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{ |
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BOOST_ASSERT( m_imp.get() && "attempt to no_push() on end iterator" ); |
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m_imp->m_no_push = true; |
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} |
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file_status status() const |
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{ |
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BOOST_ASSERT( m_imp.get() |
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&& "attempt to call status() on end recursive_iterator" ); |
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return m_imp->m_stack.top()->status(); |
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} |
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file_status symlink_status() const |
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{ |
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BOOST_ASSERT( m_imp.get() |
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&& "attempt to call symlink_status() on end recursive_iterator" ); |
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return m_imp->m_stack.top()->symlink_status(); |
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} |
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private: |
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// shared_ptr provides shallow-copy semantics required for InputIterators. |
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// m_imp.get()==0 indicates the end iterator. |
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boost::shared_ptr< detail::recur_dir_itr_imp< Path > > m_imp; |
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friend class boost::iterator_core_access; |
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typename boost::iterator_facade< |
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basic_recursive_directory_iterator<Path>, |
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basic_directory_entry<Path>, |
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boost::single_pass_traversal_tag >::reference |
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dereference() const |
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{ |
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BOOST_ASSERT( m_imp.get() && "attempt to dereference end iterator" ); |
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return *m_imp->m_stack.top(); |
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} |
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void increment(); |
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bool equal( const basic_recursive_directory_iterator & rhs ) const |
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{ return m_imp == rhs.m_imp; } |
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}; |
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typedef basic_recursive_directory_iterator<path> recursive_directory_iterator; |
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# ifndef BOOST_FILESYSTEM_NARROW_ONLY |
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typedef basic_recursive_directory_iterator<wpath> wrecursive_directory_iterator; |
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# endif |
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// basic_recursive_directory_iterator implementation -------------------// |
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// constructors |
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template<class Path> |
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basic_recursive_directory_iterator<Path>:: |
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basic_recursive_directory_iterator( const Path & dir_path ) |
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: m_imp( new detail::recur_dir_itr_imp<Path> ) |
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{ |
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m_imp->m_stack.push( basic_directory_iterator<Path>( dir_path ) ); |
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} |
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template<class Path> |
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basic_recursive_directory_iterator<Path>:: |
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basic_recursive_directory_iterator( const Path & dir_path, system_error_type & ec ) |
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: m_imp( new detail::recur_dir_itr_imp<Path> ) |
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{ |
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m_imp->m_stack.push( basic_directory_iterator<Path>( dir_path, std::nothrow ) ); |
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m_imp->m_no_throw = true; |
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} |
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|
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// increment |
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template<class Path> |
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void basic_recursive_directory_iterator<Path>::increment() |
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{ |
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BOOST_ASSERT( m_imp.get() && "increment on end iterator" ); |
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|
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static const basic_directory_iterator<Path> end_itr; |
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|
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if ( m_imp->m_no_push ) m_imp->m_no_push = false; |
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else if ( is_directory( m_imp->m_stack.top()->status() ) ) |
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{ |
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system_error_type ec; |
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m_imp->m_stack.push( |
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m_imp->m_no_throw |
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? basic_directory_iterator<Path>( *m_imp->m_stack.top(), ec ) |
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: basic_directory_iterator<Path>( *m_imp->m_stack.top() ) |
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); |
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if ( m_imp->m_stack.top() != end_itr ) |
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{ |
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++m_imp->m_level; |
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return; |
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} |
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m_imp->m_stack.pop(); |
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} |
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|
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while ( !m_imp->m_stack.empty() |
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&& ++m_imp->m_stack.top() == end_itr ) |
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{ |
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m_imp->m_stack.pop(); |
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--m_imp->m_level; |
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} |
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|
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if ( m_imp->m_stack.empty() ) m_imp.reset(); // done, so make end iterator |
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} |
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|
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// pop |
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template<class Path> |
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void basic_recursive_directory_iterator<Path>::pop() |
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{ |
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BOOST_ASSERT( m_imp.get() && "pop on end iterator" ); |
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BOOST_ASSERT( m_imp->m_level > 0 && "pop with level < 1" ); |
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|
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m_imp->m_stack.pop(); |
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--m_imp->m_level; |
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} |
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|
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// what() basic_filesystem_error_decoder -------------------------------// |
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|
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namespace detail |
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{ |
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|
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# if BOOST_WORKAROUND(__BORLANDC__,BOOST_TESTED_AT(0x581)) |
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using boost::filesystem::system_message; |
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# endif |
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|
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inline void decode_system_message( system_error_type ec, std::string & target ) |
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{ |
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system_message( ec, target ); |
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} |
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|
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# if defined(BOOST_WINDOWS_API) && !defined(BOOST_FILESYSTEM_NARROW_ONLY) |
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inline void decode_system_message( system_error_type ec, std::wstring & target ) |
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{ |
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system_message( ec, target ); |
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} |
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# endif |
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|
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template<class String> |
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void decode_system_message( system_error_type ec, String & target ) |
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{ |
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std::string temp; |
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system_message( ec, temp ); |
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for ( const char * p = temp.c_str(); *p != 0; ++p ) |
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{ target += static_cast<typename String::value_type>( *p ); } |
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} |
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} |
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|
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template<class Path> |
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typename Path::string_type what( const basic_filesystem_error<Path> & ex ) |
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{ |
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typename Path::string_type s; |
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for ( const char * p = ex.what(); *p != 0; ++p ) |
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{ s += static_cast<typename Path::string_type::value_type>( *p ); } |
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|
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if ( !ex.path1().empty() ) |
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{ |
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s += static_cast<typename Path::string_type::value_type>( ':' ); |
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s += static_cast<typename Path::string_type::value_type>( ' ' ); |
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s += static_cast<typename Path::string_type::value_type>( '\"' ); |
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s += ex.path1().file_string(); |
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s += static_cast<typename Path::string_type::value_type>( '\"' ); |
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} |
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if ( !ex.path2().empty() ) |
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{ |
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s += static_cast<typename Path::string_type::value_type>( ',' ); |
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s += static_cast<typename Path::string_type::value_type>( ' ' ); |
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s += static_cast<typename Path::string_type::value_type>( '\"' ); |
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s += ex.path2().file_string(); |
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s += static_cast<typename Path::string_type::value_type>( '\"' ); |
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} |
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if ( ex.system_error() ) |
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{ |
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s += static_cast<typename Path::string_type::value_type>( ' ' ); |
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|
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detail::decode_system_message( ex.system_error(), s ); |
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} |
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return s; |
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} |
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} // namespace filesystem |
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} // namespace boost |
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|
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#undef BOOST_FS_FUNC_STRING |
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#undef BOOST_FS_FUNC |
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|
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#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas |
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#endif // BOOST_FILESYSTEM_CONVENIENCE_HPP |