unrar/getbits.cpp at main · aawc/unrar · GitHub

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#include "rar.hpp"

BitInput::BitInput(bool AllocBuffer)

{

ExternalBuffer=false;

if (AllocBuffer)

{

// getbits*() attempt to read data from InAddr, ... InAddr+8 positions.

// So let's allocate 8 additional bytes for situation, when we need to

// read only 1 byte from the last position of buffer and avoid a crash

// from access to next 8 bytes, which contents we do not need.

size_t BufSize=MAX_SIZE+8;

InBuf=new byte[BufSize];

// Ensure that we get predictable results when accessing bytes in area

// not filled with read data.

memset(InBuf,0,BufSize);

}

else

InBuf=nullptr;

}

BitInput::~BitInput()

{

if (!ExternalBuffer)

delete[] InBuf;

}

void BitInput::faddbits(uint Bits)

{

// Function wrapped version of inline addbits to reduce the code size.

addbits(Bits);

}

uint BitInput::fgetbits()

{

// Function wrapped version of inline getbits to reduce the code size.

return getbits();

}

void BitInput::SetExternalBuffer(byte *Buf)

{

if (InBuf!=nullptr && !ExternalBuffer)

delete[] InBuf;

InBuf=Buf;

ExternalBuffer=true;

}

unrar/getbits.cpp at main · aawc/unrar · GitHub

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