mirror of
https://github.com/polserver/polserver
synced 2026-08-13 08:23:08 -04:00
1463b76c7c
* all except pol * pol and includes under defines * something weird has happened * remove own folder from include searchpath * fixed remaining, adapted include style for external headers * missing include
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
#include "bscript/compiler/codegen/DataEmitter.h"
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#include <algorithm>
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#include <limits>
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#include <stdexcept>
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namespace Pol::Bscript::Compiler
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{
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DataEmitter::DataEmitter( DataSection& data_section ) : data_section( data_section ) {}
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unsigned DataEmitter::append( double value )
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{
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// The old compiler always appends doubles. For parity,
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// we'll do the same here.
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return append( reinterpret_cast<const std::byte*>( &value ), sizeof value );
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}
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unsigned DataEmitter::append( int value )
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{
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// The old compiler always appends integers. For parity,
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// we'll do the same here.
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return append( reinterpret_cast<const std::byte*>( &value ), sizeof value );
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}
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unsigned DataEmitter::store( const std::string& s )
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{
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return store( reinterpret_cast<const std::byte*>( s.c_str() ),
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static_cast<unsigned>( s.length() + 1 ) );
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}
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unsigned DataEmitter::store( const std::byte* data, size_t len )
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{
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if ( auto existing = find( data, len ) )
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return existing;
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return append( data, len );
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}
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unsigned DataEmitter::append( const std::byte* data, size_t len )
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{
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size_t position = data_section.size();
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if ( position + len > std::numeric_limits<unsigned>::max() )
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{
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throw std::runtime_error( "Data offset overflow" );
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}
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data_section.insert( data_section.end(), data, data + len );
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return static_cast<unsigned>( position );
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}
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unsigned DataEmitter::find( const std::byte* data, size_t len )
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{
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if ( data_section.empty() )
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return 0;
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auto start = data_section.begin();
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++start; // offset=0 means no data, not data at offset 0
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auto itr = std::search( start, data_section.end(), data, data + len );
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if ( itr != data_section.end() )
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return static_cast<unsigned>( itr - data_section.begin() );
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return 0;
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}
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} // namespace Pol::Bscript::Compiler
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