Added: #1440 NeL IStream interface to gsflib with max specific features
--HG-- branch : build_pipeline_v3hg/feature/build_pipeline_v3
kaetemi
12 years ago
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15602bb2c6
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544660d8b3
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/**
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* \file storage_stream.cpp
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* \brief CStorageStream
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* \date 2012-08-16 22:06GMT
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* \author Jan Boon (Kaetemi)
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* CStorageStream
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*/
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/*
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* Copyright (C) 2012 by authors
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*
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* This file is part of RYZOM CORE PIPELINE.
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* RYZOM CORE PIPELINE is free software: you can redistribute it
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* and/or modify it under the terms of the GNU Affero General Public
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* License as published by the Free Software Foundation, either
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* version 3 of the License, or (at your option) any later version.
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*
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* RYZOM CORE PIPELINE is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with RYZOM CORE PIPELINE. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#include <nel/misc/types_nl.h>
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#include "storage_stream.h"
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// STL includes
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// 3rd Party includes
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#include <gsf/gsf-input-stdio.h>
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// NeL includes
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// #include <nel/misc/debug.h>
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// Project includes
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using namespace std;
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// using namespace NLMISC;
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namespace PIPELINE {
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CStorageStream::CStorageStream(GsfInput *input) : NLMISC::IStream(true), m_Input(input)
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{
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m_RootChunk.OffsetBegin = -6;
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m_RootChunk.Id = 0;
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m_RootChunk.Size = 0x80000000;
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m_CurrentChunk = &m_RootChunk;
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}
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CStorageStream::~CStorageStream()
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{
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}
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bool CStorageStream::seek(sint32 offset, NLMISC::IStream::TSeekOrigin origin) const
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{
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if (m_Input)
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{
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switch (origin)
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{
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case begin:
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return gsf_input_seek(m_Input, offset, G_SEEK_SET);
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case current:
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return gsf_input_seek(m_Input, offset, G_SEEK_CUR);
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case end:
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return gsf_input_seek(m_Input, offset, G_SEEK_END);
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}
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}
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return NLMISC::IStream::seek(offset, origin);
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}
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sint32 CStorageStream::getPos() const
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{
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if (m_Input)
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{
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gsf_off_t res = gsf_input_tell(m_Input);
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if (res < 2147483647L) // exception when larger
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return (sint32)res;
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}
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return NLMISC::IStream::getPos();
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}
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void CStorageStream::serialBuffer(uint8 *buf, uint len)
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{
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if (!len)
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return;
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if (m_Input)
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{
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if (!gsf_input_read(m_Input, len, buf))
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throw NLMISC::EStream();
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}
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else
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{
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throw NLMISC::EStream();
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}
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}
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void CStorageStream::serialBit(bool &bit)
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{
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uint8 var = (uint8)bit;
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serial(var);
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bit = (bool)var;
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}
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bool CStorageStream::eof()
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{
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return gsf_input_eof(m_Input);
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}
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bool CStorageStream::enterChunk()
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{
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// input logic
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if (!isChunkContainer())
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return false;
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if (endOfChunk())
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return false;
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CChunk *chunk = new CChunk();
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chunk->OffsetBegin = CStorageStream::getPos();
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serial(chunk->Id);
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serial(chunk->Size);
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chunk->Parent = m_CurrentChunk;
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{
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// temp memleak fix
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std::map<uint16, CChunk *>::iterator it = m_CurrentChunk->Children.find(chunk->Id);
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if (it != m_CurrentChunk->Children.end())
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m_CurrentChunk->Children.erase(it);
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}
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m_CurrentChunk->Children[chunk->Id] = chunk; // assuming there's one child per id...
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m_CurrentChunk = chunk;
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return true;
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}
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sint32 CStorageStream::leaveChunk()
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{
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// input logic
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sint32 skipped = m_CurrentChunk->endOfChunk() - CStorageStream::getPos();
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if (skipped)
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CStorageStream::seek(m_CurrentChunk->endOfChunk(), begin);
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m_CurrentChunk = m_CurrentChunk->Parent;
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return skipped;
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}
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void CStorageStream::buildChunkIndexById()
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{
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}
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void CStorageStream::findChunkById(uint16 id)
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{
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}
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} /* namespace PIPELINE */
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/* end of file */
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@ -0,0 +1,120 @@
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/**
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* \file storage_stream.h
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* \brief CStorageStream
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* \date 2012-08-16 22:06GMT
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* \author Jan Boon (Kaetemi)
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* CStorageStream
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*/
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/*
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* Copyright (C) 2012 by authors
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*
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* This file is part of RYZOM CORE PIPELINE.
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* RYZOM CORE PIPELINE is free software: you can redistribute it
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* and/or modify it under the terms of the GNU Affero General Public
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* License as published by the Free Software Foundation, either
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* version 3 of the License, or (at your option) any later version.
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*
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* RYZOM CORE PIPELINE is distributed in the hope that it will be
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* useful, but WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public
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* License along with RYZOM CORE PIPELINE. If not, see
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* <http://www.gnu.org/licenses/>.
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*/
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#ifndef PIPELINE_STORAGE_STREAM_H
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#define PIPELINE_STORAGE_STREAM_H
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#include <nel/misc/types_nl.h>
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// STL includes
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#include <map>
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// 3rd Party includes
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#include <gsf/gsf-infile.h>
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// NeL includes
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#include <nel/misc/stream.h>
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// Project includes
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namespace PIPELINE {
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struct CChunk
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{
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CChunk() : Parent(NULL) { }
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~CChunk()
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{
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for (std::map<uint16, CChunk *>::iterator it = Children.begin(), end = Children.end(); it != end; ++it)
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delete it->second;
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Children.clear();
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}
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CChunk *Parent;
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std::map<uint16, CChunk *> Children;
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// Where the header starts
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sint32 OffsetBegin;
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// Identifier
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uint16 Id;
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// Size including header size
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uint32 Size;
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inline sint32 getSizeWithHeader() { return (sint32)(Size & 0x7FFFFFFF); }
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inline sint32 getSize() { return getSizeWithHeader() - 6; }
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inline bool isContainer() { return (Size & 0x80000000) == 0x80000000; }
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inline sint32 endOfChunk() { return OffsetBegin + getSizeWithHeader(); }
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inline sint32 getDataBegin() { return OffsetBegin + 6; }
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};
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/**
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* \brief CStorageStream
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* \date 2012-08-16 22:06GMT
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* \author Jan Boon (Kaetemi)
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* CStorageStream
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*/
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class CStorageStream : public NLMISC::IStream
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{
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public:
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CStorageStream(GsfInput *input);
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virtual ~CStorageStream();
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virtual bool seek(sint32 offset, TSeekOrigin origin) const;
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virtual sint32 getPos() const;
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// virtual std::string getStreamName() const; // char const * gsf_input_name (GsfInput *input);
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virtual void serialBuffer(uint8 *buf, uint len);
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virtual void serialBit(bool &bit);
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bool eof();
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// Returns true if there's another chunk, false if no more chunks in this container or if the current chunk is not a container
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bool enterChunk();
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// Returns the number of skipped bytes
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sint32 leaveChunk();
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inline uint16 getChunkId() { return m_CurrentChunk->Id; }
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inline sint32 getChunkSize() { return m_CurrentChunk->getSize(); }
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inline bool isChunkContainer() { return m_CurrentChunk->isContainer(); }
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inline bool endOfChunk() { return m_CurrentChunk == &m_RootChunk ? eof() : CStorageStream::getPos() >= m_CurrentChunk->endOfChunk(); }
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void buildChunkIndexById();
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void findChunkById(uint16 id);
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private:
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GsfInput *m_Input;
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CChunk m_RootChunk;
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CChunk *m_CurrentChunk;
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/* there exist compressed max files, so maybe we will need this at some point
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GsfInput * gsf_input_uncompress (GsfInput *src);
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*/
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}; /* class CStorageStream */
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} /* namespace PIPELINE */
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#endif /* #ifndef PIPELINE_STORAGE_STREAM_H */
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/* end of file */
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