Merge pull request #3 from top13001/feature/Decompress

Feature/decompress

Decompress.H

@@ -0,0 +1,22 @@
+#ifndef __DECOMPRESS_H__
+#define __DECOMPRESS_H__
+
+#include "Huffman.H"
+
+#include<queue>
+
+using namespace std;
+
+class Decompress : public Huffman {
+	int bodySize;
+	int headerSize;
+	string preorderStr;
+	queue<char> letters;	
+	string body;
+
+public:
+	Decompress(string fname): Huffman(fname){} 
+	void parseText();
+};
+
+#endif

Decompress.cpp

@@ -0,0 +1,88 @@
+#include "Decompress.H"
+
+#include <fstream>
+#include <iostream>
+#include <string>
+#include <math.h>
+#include <string.h>
+
+using namespace std;
+
+void Decompress::parseText(){
+	ifstream inpFile(_fname);
+
+	if (!inpFile.is_open()){
+		throw("[Error] Could not open file " + _fname + " in parseText()\n");
+	}
+
+	char c;
+	string val;
+
+	//Retrieve header Size
+	while(inpFile.get(c) && c != '/'){
+		val += string(1,c);	
+	}
+	headerSize = stoi(val);
+
+	//Retrieve Body Size
+	val = "";
+	while (inpFile.get(c) && c != '/'){
+		val += string(1,c);		
+	}
+	bodySize = stoi(val);
+
+	//Getting PreOrder String
+	val = "";
+	for (int i = 0; i < ceil(headerSize/8.0);i++){
+		val += inpFile.get();
+	}
+
+	preorderStr = convertToString(val);
+	cout << "Before Cutting: " << preorderStr << endl;
+	preorderStr = string(preorderStr.begin(),preorderStr.begin()+headerSize);
+
+	//Getting Letters for each leaf in Tree
+	int counter = 0;
+	for (char c : preorderStr){
+		if(c == '1') counter++;
+	}
+
+	for (int i = 0; i < counter;i++){
+		letters.push(inpFile.get());	
+	}
+
+/*	while ( letters.size() > 0){
+		cout << letters.front() << endl;
+		letters.pop();
+	} //Print method to see letters in queue */
+
+	//Getting the body of compressed file and then converting it into string form
+	val = "";
+	while (inpFile.get(c)){
+		val += string(1,c);	
+	}
+	inpFile.close();
+	body = convertToString(val);
+	body = string(body.begin(),body.begin()+bodySize);
+	cout << headerSize << " - " << bodySize << " - " << preorderStr << " - " << letters.size() << " - "; 
+	cout << "String size = " << val.length()<< " -- " << val << " : " << body << endl;
+
+}
+
+
+int main(int argc, char *argv[]){
+	using namespace std;
+	try{
+/*
+		shared_ptr<Compress> conv = make_shared<Compress>(Compress(argv[1]));
+		conv->generateTree();
+		conv->generateBitMap();
+		conv->compressFile("random");
+		cout << "String bit for A : " << convertToString("A") << endl;
+*/
+		Decompress tst = Decompress(argv[1]);
+		tst.parseText();
+	}
+	catch(string &e){cout << e;}
+	return 0;
+}