//compressing pdf file
//Writng Compress File
public void PDFCompressFile(string content)
{
//string fileName = "compressed.cmu";
// Create a new file
writeBitByBit bit = new writeBitByBit(CompName); //creating an instance of bit write
//writing tree info
PQueue.cNode top = root;
printHeaderTree(top, bit);
int c;
string code = "0"; //initializing
for (int i = 0; i < content.Length; ++i) //reading char from string containg input
{
Console.WriteLine(content[i]);
if (HuffmanCode.ContainsKey(content[i]))
{
code = HuffmanCode[content[i]]; //reading character's huffman code from th Code table
}
else
{
//if not fount in table do nothing
}
for (int j = 0; j < code.Length; ++j) //reading each character from the Huffman code like if code for A = 011 the first 0 then 1 and then 1
{
if (code[j] == '0')
{
bit.BitWrite(0); //calling writing function with 0
}
else
{
bit.BitWrite(1); //calling writing function with 1
}
}
}
//now we need to write psedu_EOF so that we don't reed extra bytes from the file
code = HuffmanCode[(char)Pseudo_EOF];
for (int i = 0; i < code.Length; ++i) //reading each character from the Huffman code like if code for A = 011 the first 0 then 1 and then 1
{
if (code[i] == '0')
{
bit.BitWrite(0); //calling writing function with 0
}
else
{
bit.BitWrite(1); //calling writing function with 1
}
}
bit.close();
}
//writing tree
public void printHeaderTree(PQueue.cNode top, writeBitByBit bit)
{
if (top == null)
{
return;
}
if (top.leftZero == null && top.rightOne == null)
{
bit.ByteWrite('1');
bit.ByteWrite(top.value);
}
else
{
bit.ByteWrite('0');
printHeaderTree(top.leftZero, bit);
printHeaderTree(top.rightOne, bit);
}
}
//Writng Compress File
public void WriteCompressFile(FileStream fs)
{
// Create a new file
writeBitByBit bit = new writeBitByBit(CompName); //creating an instance of bit write
//writing tree info
PQueue.cNode top = root;
printHeaderTree(top, bit);
string code = "0";
if (fileExten1 == ".csv") //code for csv is different because that code cause problem with csv files
{
var sr = new StreamReader(fs); //opeining input file to be compreesed so to read from it and compare and store
int c;
while ((c = sr.Read()) != -1) //reading char from input file
{
if (frequencyMap.ContainsKey((char)c)) //while calculating frequencies we don't calculate 10 which is LF so we use try to avoid exception when 10 comes as it is not present in the HuffmanCode directory
{
code = HuffmanCode[(char)c]; //reading character's huffman code from th Code table
}
for (int i = 0; i < code.Length; ++i) //reading each character from the Huffman code like if code for A = 011 the first 0 then 1 and then 1
{
if (code[i] == '0')
{
bit.BitWrite(0); //calling writing function with 0
}
else
{
bit.BitWrite(1); //calling writing function with 1
}
}
}
}
else //code for .txt and .cpp .c .cs
{
using (var sr1 = new StreamReader(fs))
{
while (!sr1.EndOfStream)
{
string s = sr1.ReadLine();
foreach (char ch in s)
{
if (frequencyMap.ContainsKey(ch))
{
code = HuffmanCode[ch]; //reading character's huffman code from th Code table
}
for (int i = 0; i < code.Length; ++i) //reading each character from the Huffman code like if code for A = 011 the first 0 then 1 and then 1
{
if (code[i] == '0')
{
bit.BitWrite(0); //calling writing function with 0
}
else
{
bit.BitWrite(1); //calling writing function with 1
}
}
}
}
}
}
//now we need to write psedu_EOF so that we don't reed extra bytes from the file
code = HuffmanCode[(char)Pseudo_EOF];
for (int i = 0; i < code.Length; ++i) //reading each character from the Huffman code like if code for A = 011 the first 0 then 1 and then 1
{
if (code[i] == '0')
{
bit.BitWrite(0); //calling writing function with 0
}
else
{
bit.BitWrite(1); //calling writing function with 1
}
}
bit.close();
fs.Close();
}