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617 lines
19 KiB
617 lines
19 KiB
/* /////////////////////////////////////////////////////////////////////////
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* File: unixstl/filesystem/file_path_buffer.hpp
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*
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* Purpose: Contains the basic_file_path_buffer template class.
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*
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* Created: 24th May 2004
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* Updated: 9th February 2011
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*
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* Home: http://stlsoft.org/
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*
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* Copyright (c) 2004-2011, Matthew Wilson and Synesis Software
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* - Neither the name(s) of Matthew Wilson and Synesis Software nor the names of
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* any contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* ////////////////////////////////////////////////////////////////////// */
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/** \file unixstl/filesystem/file_path_buffer.hpp
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*
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* \brief [C++ only] Definition of the unixstl::basic_file_path_buffer class
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* template
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* (\ref group__library__filesystem "File System" Library).
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*/
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#ifndef UNIXSTL_INCL_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER
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#define UNIXSTL_INCL_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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# define UNIXSTL_VER_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER_MAJOR 4
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# define UNIXSTL_VER_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER_MINOR 2
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# define UNIXSTL_VER_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER_REVISION 1
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# define UNIXSTL_VER_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER_EDIT 65
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* Includes
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*/
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#ifndef UNIXSTL_INCL_UNIXSTL_H_UNIXSTL
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# include <unixstl/unixstl.h>
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#endif /* !UNIXSTL_INCL_UNIXSTL_H_UNIXSTL */
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#ifndef STLSOFT_INCL_STLSOFT_MEMORY_HPP_AUTO_BUFFER
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# include <stlsoft/memory/auto_buffer.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_MEMORY_HPP_AUTO_BUFFER */
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#ifndef STLSOFT_INCL_STLSOFT_MEMORY_HPP_ALLOCATOR_SELECTOR
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# include <stlsoft/memory/allocator_selector.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_MEMORY_HPP_ALLOCATOR_SELECTOR */
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#ifndef UNIXSTL_INCL_UNIXSTL_SHIMS_ACCESS_HPP_STRING
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# include <unixstl/shims/access/string.hpp>
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#endif /* !UNIXSTL_INCL_UNIXSTL_SHIMS_ACCESS_HPP_STRING */
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#ifndef STLSOFT_INCL_STLSOFT_STRING_HPP_COPY_FUNCTIONS
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# include <stlsoft/string/copy_functions.hpp>
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#endif /* !STLSOFT_INCL_STLSOFT_STRING_HPP_COPY_FUNCTIONS */
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#ifndef STLSOFT_INCL_H_UNISTD
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# define STLSOFT_INCL_H_UNISTD
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# include <unistd.h>
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#endif /* !STLSOFT_INCL_H_UNISTD */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*/
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#ifndef _UNIXSTL_NO_NAMESPACE
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# if defined(_STLSOFT_NO_NAMESPACE) || \
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defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
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/* There is no stlsoft namespace, so must define ::unixstl */
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namespace unixstl
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{
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# else
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/* Define stlsoft::unixstl_project */
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namespace stlsoft
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{
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namespace unixstl_project
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{
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# endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* !_UNIXSTL_NO_NAMESPACE */
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/* /////////////////////////////////////////////////////////////////////////
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* Classes
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*/
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// class basic_file_path_buffer
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/** \brief Acts as a buffer with sufficient size for any drive on the host machine
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*
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* \ingroup group__library__filesystem
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*
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* This class is a non-template class primarily so that separate instantiations
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* are not created for each instantiation of the basic_file_path_buffer.
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*
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* This class provides a simple function, which is to provide the maximum path
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* length for the host. This information is then cached due to the static nature
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* of the get_drivesvar_() method, although it can be reset by calling the
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* refresh() method on the buffer class.
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*
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* \param C The character type
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* \param A The allocator type
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*/
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template< ss_typename_param_k C
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#ifdef STLSOFT_CF_TEMPLATE_CLASS_DEFAULT_CLASS_ARGUMENT_SUPPORT
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, ss_typename_param_k A = ss_typename_type_def_k allocator_selector<C>::allocator_type
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#else /* ? STLSOFT_CF_TEMPLATE_CLASS_DEFAULT_CLASS_ARGUMENT_SUPPORT */
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, ss_typename_param_k A /* = ss_typename_type_def_k allocator_selector<C>::allocator_type */
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#endif /* STLSOFT_CF_TEMPLATE_CLASS_DEFAULT_CLASS_ARGUMENT_SUPPORT */
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>
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class basic_file_path_buffer
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{
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/// \name Member Constants
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/// @{
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private:
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enum
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{
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#ifdef PATH_MAX
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internalBufferSize = 1 + PATH_MAX
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#else /* ? PATH_MAX */
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internalBufferSize = 1 + 512
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#endif /* PATH_MAX */
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};
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enum
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{
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indeterminateMaxPathGuess = 2048
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};
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typedef stlsoft_ns_qual(auto_buffer)<
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C
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, internalBufferSize
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, A
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> buffer_type_;
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/// @}
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/// \name Member Types
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/// @{
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public:
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/// \brief The character type
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typedef C char_type;
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/// \brief The allocator type
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typedef A allocator_type;
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/// \brief The current parameterisation of the type
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typedef basic_file_path_buffer<C, A> class_type;
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/// \brief The value type
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typedef ss_typename_type_k buffer_type_::value_type value_type;
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/// \brief The reference type
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typedef value_type& reference;
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/// \brief The non-mutating (const) reference type
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typedef value_type const& const_reference;
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/// \brief The size type
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typedef ss_typename_type_k buffer_type_::size_type size_type;
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/// @}
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/// \name Construction
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/// @{
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public:
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/// \brief Default constructor
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basic_file_path_buffer()
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: m_buffer(1 + calc_path_max_())
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{
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#ifdef _DEBUG
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::memset(&m_buffer[0], '?', m_buffer.size());
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m_buffer[m_buffer.size() - 1] = '\0';
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#endif /* _DEBUG */
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}
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/// \brief Copy constructor
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basic_file_path_buffer(class_type const& rhs)
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: m_buffer(rhs.size())
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{
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stlsoft_ns_qual(pod_copy_n)(data(), rhs.data(), m_buffer.size());
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}
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/// \brief Copy assignment operator
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class_type& operator =(class_type const& rhs)
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{
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m_buffer.resize(rhs.size());
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stlsoft_ns_qual(pod_copy_n)(data(), rhs.data(), m_buffer.size());
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return *this;
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}
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/// @}
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/// \name Operations
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/// @{
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public:
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/// \brief Swaps the contents with those of another instance
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///
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/// \param rhs The instance whose contents will be swapped with the
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/// callee
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///
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/// \note The complexity of this operation is not guaranteed
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/// to be constant-time. See the documentation for
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/// \link stlsoft::auto_buffer auto_buffer\endlink for
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/// further details.
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void swap(class_type& rhs) stlsoft_throw_0()
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{
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m_buffer.swap(rhs.m_buffer);
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}
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/// \brief Resizes the buffer to the given size.
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us_bool_t grow(size_type newSize)
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{
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return m_buffer.resize(newSize);
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}
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/// \brief Doubles the size of the buffer
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us_bool_t grow()
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{
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return grow(2 * size());
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}
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/// @}
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/// \name Accessors
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/// @{
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public:
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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value_type const* data() const
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{
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return m_buffer.data();
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}
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value_type* data()
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{
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return m_buffer.data();
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}
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/// \brief Returns a pointer to a nul-terminated string
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value_type const* c_str() const
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{
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return this->data();
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}
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/// \brief Returns a mutable (non-const) pointer to the internal buffer
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reference operator [](us_size_t index)
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{
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buffer_type_& this_ = m_buffer;
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return this_[index];
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}
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#if !defined(STLSOFT_COMPILER_IS_COMO) && \
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!defined(STLSOFT_COMPILER_IS_MWERKS)
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/// \brief Returns a non-mutable (const) pointer to the internal buffer
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const_reference operator [](us_size_t index) const
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{
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UNIXSTL_MESSAGE_ASSERT("Index out of range", !(size() < index));
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return data()[index];
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}
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#endif /* compiler */
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/// \brief Returns the size of the internal buffer
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size_type size() const
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{
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return m_buffer.size();
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}
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/// \brief Returns the maximum size of the internal buffer
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static size_type max_size()
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{
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return calc_path_max_();
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}
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/// \brief Copies the contents into a caller supplied buffer
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///
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/// \param buffer Pointer to character buffer to receive the contents.
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/// May be NULL, in which case the method returns size().
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/// \param cchBuffer Number of characters of available space in \c buffer.
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size_type copy(char_type* buffer, size_type cchBuffer) const
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{
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return stlsoft_ns_qual(copy_contents)(buffer, cchBuffer, m_buffer.data(), m_buffer.size());
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}
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/// @}
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/// \name Operations
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/// @{
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public:
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/// \brief Causes the drives to be examined again for the next instance.
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///
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/// \deprecated
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static void refresh() stlsoft_throw_0()
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{}
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/// @}
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/// \name Implementation
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/// @{
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private:
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static size_type calc_path_max_()
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{
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#ifdef PATH_MAX
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return PATH_MAX;
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#else /* ? PATH_MAX */
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int pathMax = ::pathconf("/", _PC_PATH_MAX);
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if(pathMax < 0)
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{
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pathMax = indeterminateMaxPathGuess;
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}
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else
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{
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++pathMax;
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}
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return static_cast<size_type>(pathMax);
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#endif /* PATH_MAX */
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}
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/// @}
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/// \name Members
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/// @{
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private:
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buffer_type_ m_buffer;
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/// @}
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};
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/* Typedefs to commonly encountered types. */
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/** \brief Specialisation of the basic_file_path_buffer template for the ANSI character type \c char
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*
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* \ingroup group__library__filesystem
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*/
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typedef basic_file_path_buffer<us_char_a_t, stlsoft_ns_qual(allocator_selector)<us_char_a_t>::allocator_type> file_path_buffer_a;
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/** \brief Specialisation of the basic_file_path_buffer template for the Unicode character type \c wchar_t
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*
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* \ingroup group__library__filesystem
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*/
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typedef basic_file_path_buffer<us_char_w_t, stlsoft_ns_qual(allocator_selector)<us_char_w_t>::allocator_type> file_path_buffer_w;
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/** \brief Specialisation of the basic_file_path_buffer template for the ANSI character type \c char
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*
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* \ingroup group__library__filesystem
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*/
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typedef basic_file_path_buffer<us_char_a_t, stlsoft_ns_qual(allocator_selector)<us_char_a_t>::allocator_type> file_path_buffer;
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/* /////////////////////////////////////////////////////////////////////////
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* Support for PlatformSTL redefinition by inheritance+namespace, for confused
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* compilers (e.g. VC++ 6)
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*/
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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template< ss_typename_param_k C
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#ifdef STLSOFT_CF_TEMPLATE_CLASS_DEFAULT_CLASS_ARGUMENT_SUPPORT
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, ss_typename_param_k A = ss_typename_type_def_k allocator_selector<C>::allocator_type
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#else /* ? STLSOFT_CF_TEMPLATE_CLASS_DEFAULT_CLASS_ARGUMENT_SUPPORT */
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, ss_typename_param_k A /* = ss_typename_type_def_k allocator_selector<C>::allocator_type */
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#endif /* STLSOFT_CF_TEMPLATE_CLASS_DEFAULT_CLASS_ARGUMENT_SUPPORT */
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>
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class basic_file_path_buffer__
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: public unixstl_ns_qual(basic_file_path_buffer)<C, A>
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{
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private:
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typedef unixstl_ns_qual(basic_file_path_buffer)<C, A> parent_class_type;
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public:
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typedef basic_file_path_buffer__<C, A> class_type;
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typedef ss_typename_type_k parent_class_type::value_type value_type;
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typedef ss_typename_type_k parent_class_type::reference reference;
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typedef ss_typename_type_k parent_class_type::const_reference const_reference;
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typedef ss_typename_type_k parent_class_type::size_type size_type;
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};
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/* /////////////////////////////////////////////////////////////////////////
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* swapping
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*/
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template<
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ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline
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void
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swap(
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basic_file_path_buffer<C, A>& lhs
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, basic_file_path_buffer<C, A>& rhs
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)
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{
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lhs.swap(rhs);
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}
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/* /////////////////////////////////////////////////////////////////////////
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* Shims
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*/
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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template <ss_typename_param_k A>
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inline us_char_a_t const* c_str_data_a(unixstl_ns_qual(basic_file_path_buffer)<us_char_a_t, A> const& b)
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{
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return b.c_str();
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}
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template <ss_typename_param_k A>
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inline us_char_w_t const* c_str_data_w(unixstl_ns_qual(basic_file_path_buffer)<us_char_w_t, A> const& b)
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{
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return b.c_str();
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}
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
|
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|
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/** \brief \ref group__concept__shim__string_access__c_str_data for unixstl::basic_file_path_buffer
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*
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* \ingroup group__concept__shim__string_access
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline C const* c_str_data(unixstl_ns_qual(basic_file_path_buffer)<C, A> const& b)
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{
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return b.c_str();
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}
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|
|
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
|
|
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template <ss_typename_param_k A>
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inline us_size_t c_str_len_a(unixstl_ns_qual(basic_file_path_buffer)<us_char_a_t, A> const& b)
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{
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return stlsoft_ns_qual(c_str_len_a)(b.c_str());
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}
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template <ss_typename_param_k A>
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inline us_size_t c_str_len_w(unixstl_ns_qual(basic_file_path_buffer)<us_char_w_t, A> const& b)
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{
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return stlsoft_ns_qual(c_str_len_w)(b.c_str());
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}
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/** \brief \ref group__concept__shim__string_access__c_str_len for unixstl::basic_file_path_buffer
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*
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* \ingroup group__concept__shim__string_access
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline us_size_t c_str_len(unixstl_ns_qual(basic_file_path_buffer)<C, A> const& b)
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{
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return stlsoft_ns_qual(c_str_len)(b.c_str());
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}
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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template <ss_typename_param_k A>
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inline us_char_a_t const* c_str_ptr_a(unixstl_ns_qual(basic_file_path_buffer)<us_char_a_t, A> const& b)
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{
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return b.c_str();
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}
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template <ss_typename_param_k A>
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inline us_char_w_t const* c_str_ptr_w(unixstl_ns_qual(basic_file_path_buffer)<us_char_w_t, A> const& b)
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{
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return b.c_str();
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}
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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|
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/** \brief \ref group__concept__shim__string_access__c_str_ptr for unixstl::basic_file_path_buffer
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*
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* \ingroup group__concept__shim__string_access
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline C const* c_str_ptr(unixstl_ns_qual(basic_file_path_buffer)<C, A> const& b)
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{
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return b.c_str();
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}
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#ifndef STLSOFT_DOCUMENTATION_SKIP_SECTION
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template <ss_typename_param_k A>
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inline us_char_a_t const* c_str_ptr_null_a(unixstl_ns_qual(basic_file_path_buffer)<us_char_a_t, A> const& b)
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{
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return stlsoft_ns_qual(c_str_ptr_null_a)(b.c_str());
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}
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template <ss_typename_param_k A>
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inline us_char_w_t const* c_str_ptr_null_w(unixstl_ns_qual(basic_file_path_buffer)<us_char_w_t, A> const& b)
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{
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return stlsoft_ns_qual(c_str_ptr_null_w)(b.c_str());
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}
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#endif /* !STLSOFT_DOCUMENTATION_SKIP_SECTION */
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/** \brief \ref group__concept__shim__string_access__c_str_ptr_null for unixstl::basic_file_path_buffer
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*
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* \ingroup group__concept__shim__string_access
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*/
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template< ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline C const* c_str_ptr_null(unixstl_ns_qual(basic_file_path_buffer)<C, A> const& b)
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{
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return stlsoft_ns_qual(c_str_ptr_null)(b.c_str());
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}
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/** \brief \ref group__concept__shim__stream_insertion "stream insertion shim" for unixstl::basic_file_path_buffer
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*
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* \ingroup group__concept__shim__stream_insertion
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*/
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template< ss_typename_param_k S
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, ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline S& operator <<(S& s, unixstl_ns_qual(basic_file_path_buffer)<C, A> const& b)
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{
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s << b.c_str();
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return s;
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}
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/* /////////////////////////////////////////////////////////////////////////
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* Unit-testing
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*/
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#ifdef STLSOFT_UNITTEST
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# include "./unittest/file_path_buffer_unittest_.h"
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#endif /* STLSOFT_UNITTEST */
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/* ////////////////////////////////////////////////////////////////////// */
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#ifndef _UNIXSTL_NO_NAMESPACE
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# if defined(_STLSOFT_NO_NAMESPACE) || \
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defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
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} // namespace unixstl
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# else
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} // namespace unixstl_project
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} // namespace stlsoft
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# endif /* _STLSOFT_NO_NAMESPACE */
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#endif /* !_UNIXSTL_NO_NAMESPACE */
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/* In the special case of Intel behaving as VC++ 7.0 or earlier on Win32, we
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* illegally insert into the std namespace.
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*/
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#if defined(STLSOFT_CF_std_NAMESPACE)
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# if ( ( defined(STLSOFT_COMPILER_IS_INTEL) && \
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defined(_MSC_VER))) && \
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_MSC_VER < 1310
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namespace std
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{
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template< ss_typename_param_k C
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, ss_typename_param_k A
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>
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inline void swap(unixstl_ns_qual(basic_file_path_buffer)<C, A>& lhs, unixstl_ns_qual(basic_file_path_buffer)<C, A>& rhs)
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{
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lhs.swap(rhs);
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}
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} // namespace std
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# endif /* INTEL && _MSC_VER < 1310 */
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#endif /* STLSOFT_CF_std_NAMESPACE */
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/* /////////////////////////////////////////////////////////////////////////
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* Namespace
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*
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* The string access shims exist either in the stlsoft namespace, or in the
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* global namespace. This is required by the lookup rules.
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*
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*/
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|
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|
#ifndef _UNIXSTL_NO_NAMESPACE
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# if !defined(_STLSOFT_NO_NAMESPACE) && \
|
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!defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
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namespace stlsoft
|
|
{
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# else /* ? _STLSOFT_NO_NAMESPACE */
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/* There is no stlsoft namespace, so must define in the global namespace */
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# endif /* !_STLSOFT_NO_NAMESPACE */
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|
|
|
using ::unixstl::c_str_data;
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using ::unixstl::c_str_data_a;
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using ::unixstl::c_str_data_w;
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|
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using ::unixstl::c_str_len;
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using ::unixstl::c_str_len_a;
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using ::unixstl::c_str_len_w;
|
|
|
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using ::unixstl::c_str_ptr;
|
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using ::unixstl::c_str_ptr_a;
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using ::unixstl::c_str_ptr_w;
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|
|
using ::unixstl::c_str_ptr_null;
|
|
using ::unixstl::c_str_ptr_null_a;
|
|
using ::unixstl::c_str_ptr_null_w;
|
|
|
|
# if !defined(_STLSOFT_NO_NAMESPACE) && \
|
|
!defined(STLSOFT_DOCUMENTATION_SKIP_SECTION)
|
|
} // namespace stlsoft
|
|
# else /* ? _STLSOFT_NO_NAMESPACE */
|
|
/* There is no stlsoft namespace, so must define in the global namespace */
|
|
# endif /* !_STLSOFT_NO_NAMESPACE */
|
|
#endif /* !_UNIXSTL_NO_NAMESPACE */
|
|
|
|
/* ////////////////////////////////////////////////////////////////////// */
|
|
|
|
#endif /* UNIXSTL_INCL_UNIXSTL_FILESYSTEM_HPP_FILE_PATH_BUFFER */
|
|
|
|
/* ///////////////////////////// end of file //////////////////////////// */
|