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121 lines
1.9 KiB
121 lines
1.9 KiB
/**
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* @file ChunkStack.cpp
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* Manages a chunk stack
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*
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* @author Ben Gardner
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* @license GPL v2+
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*/
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#include "ChunkStack.h"
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void ChunkStack::Set(const ChunkStack &cs)
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{
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m_cse.resize(cs.m_cse.size());
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for (size_t idx = 0; idx < m_cse.size(); idx++)
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{
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m_cse[idx].m_pc = cs.m_cse[idx].m_pc;
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m_cse[idx].m_seqnum = cs.m_cse[idx].m_seqnum;
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}
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m_seqnum = cs.m_seqnum;
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}
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const ChunkStack::Entry *ChunkStack::Top() const
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{
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if (!m_cse.empty())
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{
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return(&m_cse[m_cse.size() - 1]);
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}
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return(nullptr);
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}
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const ChunkStack::Entry *ChunkStack::Get(size_t idx) const
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{
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if (idx < m_cse.size())
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{
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return(&m_cse[idx]);
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}
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return(nullptr);
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}
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Chunk *ChunkStack::GetChunk(size_t idx) const
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{
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if (idx < m_cse.size())
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{
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return(m_cse[idx].m_pc);
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}
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return(Chunk::NullChunkPtr);
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}
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Chunk *ChunkStack::Pop_Front()
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{
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Chunk *pc = Chunk::NullChunkPtr;
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if (!m_cse.empty())
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{
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pc = m_cse[0].m_pc;
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m_cse.pop_front();
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}
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return(pc);
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}
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Chunk *ChunkStack::Pop_Back()
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{
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Chunk *pc = Chunk::NullChunkPtr;
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if (!m_cse.empty())
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{
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pc = m_cse[m_cse.size() - 1].m_pc;
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m_cse.pop_back();
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}
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return(pc);
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}
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void ChunkStack::Push_Back(Chunk *pc, size_t seqnum)
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{
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m_cse.push_back(Entry(seqnum, pc));
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if (m_seqnum < seqnum)
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{
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m_seqnum = seqnum;
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}
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}
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void ChunkStack::Zap(size_t idx)
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{
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if (idx < m_cse.size())
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{
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m_cse[idx].m_pc = Chunk::NullChunkPtr;
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}
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}
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void ChunkStack::Collapse()
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{
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size_t wr_idx = 0;
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for (size_t rd_idx = 0; rd_idx < m_cse.size(); rd_idx++)
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{
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if (m_cse[rd_idx].m_pc->IsNotNullChunk())
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{
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if (rd_idx != wr_idx)
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{
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m_cse[wr_idx].m_pc = m_cse[rd_idx].m_pc;
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m_cse[wr_idx].m_seqnum = m_cse[rd_idx].m_seqnum;
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}
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wr_idx++;
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}
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}
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m_cse.resize(wr_idx);
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}
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