mirror of https://github.com/Icinga/icinga2.git
98 lines
1.6 KiB
C++
98 lines
1.6 KiB
C++
#include "i2-base.h"
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using namespace icinga;
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FIFO::FIFO(void)
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{
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m_Buffer = NULL;
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m_DataSize = 0;
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m_AllocSize = 0;
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m_Offset = 0;
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}
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FIFO::~FIFO(void)
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{
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Memory::Free(m_Buffer);
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}
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void FIFO::ResizeBuffer(size_t newSize)
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{
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if (m_AllocSize >= newSize)
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return;
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newSize = (newSize / FIFO::BlockSize + 1) * FIFO::BlockSize;
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m_Buffer = (char *)Memory::Reallocate(m_Buffer, newSize);
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m_AllocSize = newSize;
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}
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void FIFO::Optimize(void)
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{
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//char *newBuffer;
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if (m_DataSize < m_Offset) {
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memcpy(m_Buffer, m_Buffer + m_Offset, m_DataSize);
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m_Offset = 0;
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return;
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}
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/*newBuffer = (char *)ResizeBuffer(NULL, 0, m_BufferSize - m_Offset);
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if (newBuffer == NULL)
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return;
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memcpy(newBuffer, m_Buffer + m_Offset, m_BufferSize - m_Offset);
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free(m_Buffer);
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m_Buffer = newBuffer;
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m_BufferSize -= m_Offset;
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m_Offset = 0;*/
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}
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size_t FIFO::GetSize(void) const
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{
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return m_DataSize;
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}
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const void *FIFO::GetReadBuffer(void) const
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{
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return m_Buffer + m_Offset;
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}
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size_t FIFO::Read(void *buffer, size_t count)
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{
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count = (count <= m_DataSize) ? count : m_DataSize;
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if (buffer != NULL)
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memcpy(buffer, m_Buffer + m_Offset, count);
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m_DataSize -= count;
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m_Offset += count;
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Optimize();
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return count;
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}
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void *FIFO::GetWriteBuffer(size_t *count)
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{
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ResizeBuffer(m_Offset + m_DataSize + *count);
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*count = m_AllocSize - m_Offset - m_DataSize;
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return m_Buffer + m_Offset + m_DataSize;
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}
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size_t FIFO::Write(const void *buffer, size_t count)
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{
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if (buffer != NULL) {
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size_t bufferSize = count;
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void *target_buffer = GetWriteBuffer(&bufferSize);
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memcpy(target_buffer, buffer, count);
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}
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m_DataSize += count;
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return count;
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}
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