consolidate all repos to one for archive

semester_5/racunalniska_vecpredstavnost/vaja_1/include/BitReader.hpp

@@ -0,0 +1,37 @@
+#pragma once
+#include "Buffer.hpp"
+
+class BitReader
+{
+public:
+  int k = 8;
+  Buffer buffer;
+  char x = 0;
+  size_t pos = 0;
+
+  int readInt()
+  {
+    int ret = buffer.buffer[pos];
+    pos += 4;
+    return ret;
+  }
+
+  char readByte()
+  {
+    x = buffer.buffer[pos];
+    pos++;
+    return x;
+  }
+
+  bool readBit()
+  {
+    if (k == 8)
+    {
+      readByte();
+      k = 0;
+    }
+    bool b = (x >> k) & 1;
+    k++;
+    return b;
+  }
+};

semester_5/racunalniska_vecpredstavnost/vaja_1/include/BitWriter.hpp

@@ -0,0 +1,39 @@
+#pragma once
+#include "Buffer.hpp"
+
+class BitWriter
+{
+public:
+  int k = 0;
+  Buffer buffer;
+  char x = 0;
+
+  void writeByte(uint8_t x)
+  {
+    // f.write((char*)&x, 1);
+    buffer.add_end(&x, sizeof(uint8_t));
+  }
+
+  void writeInt(int x)
+  {
+    buffer.add_end((uint8_t *)&x, sizeof(x));
+  }
+
+  void writeBit(bool b)
+  {
+    if (k == 8)
+    {
+      writeByte(x);
+      k = 0;
+      x = 0;
+    }
+    x ^= (-b ^ x) & (1 << k);
+    k++;
+  }
+
+  void finish()
+  {
+    if (k > 0)
+      writeByte(x);
+  }
+};

semester_5/racunalniska_vecpredstavnost/vaja_1/include/Buffer.hpp

@@ -0,0 +1,36 @@
+#pragma once
+#include <cstdint>
+#include <string>
+
+class Buffer
+{
+public:
+  uint8_t *buffer = nullptr;
+  size_t taken = 0;
+  size_t size = 0;
+  std::string file_path;
+
+  Buffer(size_t size);
+  Buffer();
+  ~Buffer();
+  bool resize(size_t new_size);
+  int add_end(uint8_t *data, size_t data_size);
+  int add_middle(uint8_t *data, size_t data_size, size_t index);
+
+  // Removes data from buffer without checking if it's in the buffer
+  void remove_fast(uint8_t *data, size_t data_size);
+
+  void remove(size_t index, size_t data_size);
+
+  int find(uint8_t *data, size_t data_size);
+
+  void remove(uint8_t *data, size_t data_size);
+
+  void clear() { taken = 0; }
+
+  bool save_to_file();
+  bool save_to_file(std::string file_path);
+
+  bool load_from_file();
+  bool load_from_file(std::string file_path);
+};

semester_5/racunalniska_vecpredstavnost/vaja_1/include/Compressor.hpp

@@ -0,0 +1,24 @@
+#pragma once
+#include "BitWriter.hpp"
+#include <vector>
+
+class Compressor
+{
+
+public:
+  Compressor() = default;
+  ~Compressor() = default;
+  void compress(std::vector<uint8_t> &input);
+  BitWriter bitWriter;
+
+private:
+  void two_bit_dif(int8_t num);
+  void tree_bit_dif(int8_t num);
+  void four_bit_dif(int8_t num);
+  void five_bit_dif(int8_t num);
+  void encode_diff(int8_t num);
+  void encode_abs(int16_t num);
+  void write_zero();
+
+  int numOfZeros = 0;
+};

semester_5/racunalniska_vecpredstavnost/vaja_1/include/Decompressor.hpp

@@ -0,0 +1,15 @@
+#include "BitReader.hpp"
+#include <vector>
+
+class Decompressor
+{
+public:
+  std::vector<uint8_t> decompress();
+  BitReader bitReader;
+
+private:
+  int8_t twoZero();
+  int8_t treeZero();
+  int8_t forZero();
+  int8_t fiveZero();
+};