/* Produce output for LZ78 Compressor
*
*
* Input : out : out is the pointer to OutStream
* outputByte : outputByte is the byte of data to be output
* index : index is the dictionary index
* EOFstate : EOFstate is used to prevent writing invalid data into the file
* mode : Fixed -> fixed output dictionary index to 16bits
* Variable -> use just sufficient number of bits to represent the dictionary index
*/
void LZ78_Output(Dictionary *dictionary,OutStream *out,unsigned char outputByte,int index,int EOFstate, int mode)
{
int bitsRequired = 0 ;
if (mode == Fixed)
bitsRequired = 16 ;
else if (mode == Variable)
bitsRequired = determineNumberOfBitsRequired(index,dictionary->currentIndex);
streamWriteBits(out,index,bitsRequired);
if (EOFstate == 0 ) // prevent writing EOF to file
streamWriteBits(out,(unsigned int)(outputByte),8);
}
HuffmanNode *buildAndAddNewHuffmanTree(OutStream *out, HuffmanNode *node, HuffmanNode *arraySymbol[], uint32 symb){
HuffmanNode *NewNode = node;
emitPathCode(out,NewNode);
streamWriteBits(out,(unsigned char)symb);
NewNode = adaptiveHuffmanTreeBuild(NewNode,symb);
huffmanUpdateAndRestructure(NewNode->parent->parent);
arraySymbol[symb] = NewNode->parent->rightChild;
return NewNode;
}
void test_streamWriteBits_given_value_8_bitSize_4_should_write_8_to_byteToWrite_return_bitIndex_4()
{
OutStream *out = initOutStream();
streamWriteBits(out,8,4);
TEST_ASSERT_EQUAL(8,out->byteToWrite);
TEST_ASSERT_EQUAL(4,out->bitIndex);
freeOutStream(out);
}
void test_streamWriteBits_given_A_bitSize_8_should_flush_A_during_closeOutStream()
{
OutStream *out = initOutStream();
out = openOutStream("test/support/test_streamWriteBits.txt", "wb" , out);
streamWriteBits(out,'A',8);
TEST_ASSERT_EQUAL('A',out->byteToWrite);
TEST_ASSERT_EQUAL(8,out->bitIndex);
closeOutStream(out);
TEST_ASSERT_EQUAL(0,out->byteToWrite);
TEST_ASSERT_EQUAL(0,out->bitIndex);
freeOutStream(out);
}
void test_streamWriteBits_given_ABCDEFGH_bitSize_64_should_flush_ABCDEFGH()
{
char *string = "ABCDEFGH" ;
int i ;
OutStream *out = initOutStream();
out = openOutStream("test/support/test_streamWriteBits_1.txt", "wb" , out);
for( i = 0 ; i < strlen(string) ; i ++ )
streamWriteBits(out,string[i],8);
closeOutStream(out);
TEST_ASSERT_EQUAL(0,out->byteToWrite);
TEST_ASSERT_EQUAL(0,out->bitIndex);
freeOutStream(out);
}
