mirror of
https://github.com/serge1/ELFIO.git
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120 lines
4.4 KiB
C++
120 lines
4.4 KiB
C++
/*
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Copyright (C) 2001-present by Serge Lamikhov-Center
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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#ifndef ELFIO_ARRAY_HPP
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#define ELFIO_ARRAY_HPP
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#include <algorithm>
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namespace ELFIO {
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//------------------------------------------------------------------------------
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// Template class for accessing array sections
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template <class S, typename T> class array_section_accessor_template
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{
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public:
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//------------------------------------------------------------------------------
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// Constructor
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explicit array_section_accessor_template( const elfio& elf_file,
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S* section );
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//------------------------------------------------------------------------------
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// Returns the number of entries in the array section
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Elf_Xword get_entries_num() const;
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//------------------------------------------------------------------------------
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// Retrieves an entry from the array section
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bool get_entry( Elf_Xword index, Elf64_Addr& address ) const;
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//------------------------------------------------------------------------------
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// Adds an entry to the array section
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void add_entry( Elf64_Addr address );
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private:
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//------------------------------------------------------------------------------
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// Reference to the ELF file
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const elfio& elf_file;
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//------------------------------------------------------------------------------
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// Pointer to the array section
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S* array_section;
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};
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//------------------------------------------------------------------------------
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// Constructor
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template <class S, typename T>
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array_section_accessor_template<S, T>::array_section_accessor_template(
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const elfio& elf_file, S* section )
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: elf_file( elf_file ), array_section( section )
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{
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}
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//------------------------------------------------------------------------------
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// Returns the number of entries in the array section
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template <class S, typename T>
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Elf_Xword array_section_accessor_template<S, T>::get_entries_num() const
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{
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Elf_Xword entry_size = sizeof( T );
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return array_section->get_size() / entry_size;
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}
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//------------------------------------------------------------------------------
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// Retrieves an entry from the array section
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template <class S, typename T>
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bool array_section_accessor_template<S, T>::get_entry(
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Elf_Xword index, Elf64_Addr& address ) const
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{
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if ( index >= get_entries_num() ) { // Is index valid
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return false;
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}
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const endianness_convertor& convertor = elf_file.get_convertor();
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const T temp = *reinterpret_cast<const T*>( array_section->get_data() +
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index * sizeof( T ) );
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address = convertor( temp );
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return true;
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}
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//------------------------------------------------------------------------------
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// Adds an entry to the array section
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template <class S, typename T>
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void array_section_accessor_template<S, T>::add_entry( Elf64_Addr address )
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{
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const endianness_convertor& convertor = elf_file.get_convertor();
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T temp = convertor( (T)address );
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array_section->append_data( reinterpret_cast<char*>( &temp ),
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sizeof( temp ) );
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}
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// Type aliases for array section accessors
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template <typename T = Elf32_Word>
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using array_section_accessor = array_section_accessor_template<section, T>;
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template <typename T = Elf32_Word>
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using const_array_section_accessor =
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array_section_accessor_template<const section, T>;
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} // namespace ELFIO
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#endif // ELFIO_ARRAY_HPP
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