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81 lines
2.1 KiB
81 lines
2.1 KiB
#include "format.h"
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#include "mmap_manager.h"
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#include <cstring>
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#include <cstring>
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template <typename T>
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memvector<T>::memvector( std::string fname ):
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data_( new mmap_manager( fname ) )
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{
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if ( !data_->size() ) {
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data_->resize( byte_io::byte_length<unsigned>() );
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byte_io::write<unsigned>( data_->rw_base( 0 ), 0 );
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}
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}
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template <typename T>
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memvector<T>::~memvector() {
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}
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template <typename T>
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void memvector<T>::print( std::ostream& out ) const {
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out << format( "size(): %s\n" ) % size();
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for ( const_iterator first = begin(), past = end(); first != past; ++first ) {
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out << *first << std::endl;
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}
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}
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template <typename T>
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void memvector<T>::resize( size_type n_s ) {
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if ( size() >= n_s ) return;
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using namespace byte_io;
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data_->resize( n_s * byte_length<value_type>() + byte_length<unsigned>() );
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iterator p_end = end();
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write<unsigned>( data_->rw_base( 0 ), n_s );
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while ( p_end != end() ) {
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*p_end = value_type();
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++p_end;
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}
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}
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template<typename T>
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void memvector<T>::insert( const_iterator where, const value_type v ) {
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assert( !( where < begin() ) );
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assert( where <= end() );
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const unsigned to_idx = where.raw() - data_->ronly_base( 0 );
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data_->resize( ( size() + 1 ) * byte_io::byte_length<value_type>() + byte_io::byte_length<unsigned>() );
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unsigned char* to = data_->rw_base( to_idx );
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// make space:
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std::memmove( to + byte_io::byte_length<value_type>(), to, end().raw() - to );
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byte_io::write<value_type>( to, v );
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byte_io::write<unsigned>( data_->rw_base( 0 ), size() + 1 );
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}
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template <typename T>
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void memvector<T>::erase( iterator where ) {
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assert( size() );
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assert( !( where < begin() ) );
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assert( where < end() );
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iterator next = where;
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++next;
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std::memmove( const_cast<unsigned char*>( where.raw() ), next.raw(), end().raw() - next.raw() );
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byte_io::write<uint32_t>( data_->rw_base( 0 ), size() - 1 );
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}
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template <typename T>
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void memvector<T>::clear() {
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data_->resize( byte_io::byte_length<uint32_t>() );
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byte_io::write<uint32_t>( data_->rw_base( 0 ), 0 );
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}
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template<typename T>
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void memvector<T>::remove( std::string fname ) {
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::unlink( fname.c_str() );
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}
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