53 lines
1.1 KiB
C++
53 lines
1.1 KiB
C++
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#include "rar.hpp"
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BitInput::BitInput(bool AllocBuffer)
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{
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ExternalBuffer=false;
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if (AllocBuffer)
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{
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// getbits32 attempts to read data from InAddr, ... InAddr+3 positions.
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// So let's allocate 3 additional bytes for situation, when we need to
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// read only 1 byte from the last position of buffer and avoid a crash
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// from access to next 3 bytes, which contents we do not need.
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size_t BufSize=MAX_SIZE+3;
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InBuf=new byte[BufSize];
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// Ensure that we get predictable results when accessing bytes in area
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// not filled with read data.
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memset(InBuf,0,BufSize);
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}
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else
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InBuf=NULL;
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}
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BitInput::~BitInput()
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{
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if (!ExternalBuffer)
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delete[] InBuf;
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}
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void BitInput::faddbits(uint Bits)
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{
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// Function wrapped version of inline addbits to save code size.
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addbits(Bits);
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}
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uint BitInput::fgetbits()
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{
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// Function wrapped version of inline getbits to save code size.
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return getbits();
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}
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void BitInput::SetExternalBuffer(byte *Buf)
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{
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if (InBuf!=NULL && !ExternalBuffer)
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delete[] InBuf;
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InBuf=Buf;
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ExternalBuffer=true;
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}
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