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// Copyright 2014 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#include "barcode.h"
#include "include/BC_QRCoderBitVector.h"
CBC_QRCoderBitVector::CBC_QRCoderBitVector()
{
m_sizeInBits = 0;
m_size = 32;
}
void CBC_QRCoderBitVector::Init()
{
m_array = FX_Alloc(FX_BYTE, m_size);
}
CBC_QRCoderBitVector::~CBC_QRCoderBitVector()
{
if(m_array != NULL) {
FX_Free(m_array);
}
m_size = 0;
m_sizeInBits = 0;
}
void CBC_QRCoderBitVector::Clear()
{
if(m_array != NULL) {
FX_Free(m_array);
m_array = NULL;
}
m_sizeInBits = 0;
m_size = 32;
m_array = FX_Alloc(FX_BYTE, m_size);
}
FX_INT32 CBC_QRCoderBitVector::At(FX_INT32 index, FX_INT32 &e)
{
if(index < 0 || index >= m_sizeInBits) {
e = BCExceptionBadIndexException;
BC_EXCEPTION_CHECK_ReturnValue(e, 0);
}
FX_INT32 value = m_array[index >> 3] & 0xff;
return (value >> (7 - (index & 0x7))) & 1;
}
FX_INT32 CBC_QRCoderBitVector::sizeInBytes()
{
return (m_sizeInBits + 7) >> 3;
}
FX_INT32 CBC_QRCoderBitVector::Size()
{
return m_sizeInBits;
}
void CBC_QRCoderBitVector::AppendBit(FX_INT32 bit, FX_INT32 &e)
{
if(!(bit == 0 || bit == 1)) {
e = BCExceptionBadValueException;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
FX_INT32 numBitsInLastByte = m_sizeInBits & 0x7;
if(numBitsInLastByte == 0) {
AppendByte(0);
m_sizeInBits -= 8;
}
m_array[m_sizeInBits >> 3] |= (bit << (7 - numBitsInLastByte));
++m_sizeInBits;
}
void CBC_QRCoderBitVector::AppendBits(FX_INT32 value, FX_INT32 numBits, FX_INT32 &e)
{
if (numBits < 0 || numBits > 32) {
e = BCExceptionBadNumBitsException;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
FX_INT32 numBitsLeft = numBits;
while (numBitsLeft > 0) {
if ((m_sizeInBits & 0x7) == 0 && numBitsLeft >= 8) {
FX_INT32 newByte = (value >> (numBitsLeft - 8)) & 0xff;
AppendByte(newByte);
numBitsLeft -= 8;
} else {
FX_INT32 bit = (value >> (numBitsLeft - 1)) & 1;
AppendBit(bit, e);
BC_EXCEPTION_CHECK_ReturnVoid(e);
--numBitsLeft;
}
}
}
void CBC_QRCoderBitVector::AppendBitVector(CBC_QRCoderBitVector *bits, FX_INT32 &e)
{
FX_INT32 size = bits->Size();
for(FX_INT32 i = 0; i < size; i++) {
FX_INT32 num = bits->At(i, e);
BC_EXCEPTION_CHECK_ReturnVoid(e);
AppendBit(num, e);
BC_EXCEPTION_CHECK_ReturnVoid(e)
}
}
void CBC_QRCoderBitVector::XOR(CBC_QRCoderBitVector *other, FX_INT32 &e)
{
if(m_sizeInBits != other->Size()) {
e = BCExceptioncanNotOperatexorOperator;
BC_EXCEPTION_CHECK_ReturnVoid(e);
}
FX_INT32 sizeInBytes = (m_sizeInBits + 7) >> 3;
for(FX_INT32 i = 0; i < sizeInBytes; ++i) {
m_array[i] ^= (other->GetArray())[i];
}
}
FX_BYTE* CBC_QRCoderBitVector::GetArray()
{
return m_array;
}
void CBC_QRCoderBitVector::AppendByte(FX_INT32 value)
{
if((m_sizeInBits >> 3) == m_size) {
FX_BYTE* newArray = FX_Alloc(FX_BYTE, m_size << 1);
FXSYS_memcpy32(newArray, m_array, m_size);
if(m_array != NULL) {
FX_Free(m_array);
}
m_array = newArray;
m_size = m_size << 1;
}
m_array[m_sizeInBits >> 3] = (FX_BYTE) value;
m_sizeInBits += 8;
}
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