bytestuffing code added

computer_networks/lab/lab4/BitStuffing.cpp

@@ -0,0 +1,55 @@
+/**
+ * /mnt/z/my_git/sixth-semester/computer_networks/lab/lab4/BitStuffing.cpp
+ * @file BitStuffing.cpp
+ * @author Avinal Kumar
+ * @since February 17, 2021
+ *
+ * Bit Stuffing Implementation in CPP
+ */
+
+#include <algorithm>
+#include <iostream>
+
+std::string bit_stuff(std::string const data) {
+  std::string stuffed = "";
+  size_t last_pos = 0;
+  while (true) {
+    size_t one = data.find("11111", last_pos);
+    if (one != std::string::npos) {
+      stuffed += data.substr(last_pos, one - last_pos + 5);
+      stuffed += '0';
+      last_pos = one + 5;
+    } else {
+      break;
+    }
+  }
+  stuffed += data.substr(last_pos);
+  return stuffed;
+}
+
+std::string bit_unstuff(std::string const data) {
+  std::string unstuff = "";
+  size_t last_pos = 0;
+  while (true) {
+    size_t one = data.find("11111", last_pos);
+    if (one != std::string::npos) {
+      unstuff += data.substr(last_pos, one - last_pos + 5);
+      last_pos = one + 6;
+    } else {
+      break;
+    }
+  }
+  unstuff += data.substr(last_pos);
+  return unstuff;
+}
+
+int main(int argc, char const *argv[]) {
+  std::string data = "";
+  std::cout << "Enter data stream consisting of 0 and 1 only:" << std::endl;
+  std::cin >> data;
+  std::string stuff = bit_stuff(data);
+  std::cout << "Data after stuffing bits: " << stuff << std::endl;
+  std::cout << "Data after unstuffing: " << bit_unstuff(stuff) << std::endl;
+  std::cout << std::endl;
+  return 0;
+}

computer_networks/lab/lab4/ByteStuffing.cpp

@@ -0,0 +1,61 @@
+/**
+ * /mnt/z/my_git/sixth-semester/computer_networks/lab/lab4/ByteStuffing.cpp
+ * @file ByteStuffing.cpp
+ * @author Avinal Kumar
+ * @since February 17, 2021
+ *
+ * Byte Stuffing Implementation in C++
+ */
+
+#include <iostream>
+
+std::string byte_stuff(std::string const data, std::string const escape) {
+  std::string stuffed = "0x";
+  size_t last_pos = 2;
+  while (true) {
+    size_t esc = data.find(escape, last_pos);
+    if (esc != std::string::npos) {
+      stuffed += data.substr(last_pos, esc - last_pos);
+      stuffed += "5D";
+      stuffed += escape;
+      last_pos = esc + 2;
+    } else {
+      break;
+    }
+  }
+  stuffed += data.substr(last_pos);
+  return stuffed;
+}
+
+std::string byte_unstuff(std::string const data) {
+  std::string unstuff = "0x";
+  size_t last_pos = 2;
+  while (true) {
+    size_t esc = data.find("5D", last_pos);
+    if (esc != std::string::npos) {
+      unstuff += data.substr(last_pos, esc - last_pos);
+      unstuff += data.substr(esc + 2, 2);
+      last_pos = esc + 4;
+    } else {
+      break;
+    }
+  }
+  unstuff += data.substr(last_pos);
+  return unstuff;
+}
+
+int main(int argc, char const *argv[]) {
+  std::string data = "";
+  std::cout << "Enter hexadecimal data string starting with 0x: " << std::endl;
+  std::cin >> data;
+  std::cout << "Flag to escape: ";
+  std::string escape = "";
+  std::cin >> escape;
+  std::string stuff = byte_stuff(data, "5D");
+  stuff = byte_stuff(stuff, escape);
+  std::cout << "Data after Byte stuffing: " << stuff << std::endl;
+  std::string unstuff = byte_unstuff(stuff);
+  std::cout << "Data after unstuffing: " << unstuff << std::endl;
+  std::cout << std::endl;
+  return 0;
+}