add ByteReader.get(dst, size) method

src/coders/byte_utils.cpp

@@ -107,6 +107,14 @@ void ByteReader::checkMagic(const char* data, size_t size) {
     pos += size;
 }
 
+void ByteReader::get(char* dst, size_t size) {
+    if (pos + size > this->size) {
+        throw std::runtime_error("buffer underflow");
+    }
+    std::memcpy(dst, data+pos, size);
+    pos += size;
+}
+
 ubyte ByteReader::get() {
     if (pos == size) {
         throw std::runtime_error("buffer underflow");

src/coders/byte_utils.hpp

@@ -52,6 +52,8 @@ public:
     ByteReader(const ubyte* data);
 
     void checkMagic(const char* data, size_t size);
+    /// @brief Get N bytes
+    void get(char* dst, size_t size);
     /// @brief Read one byte (unsigned 8 bit integer)
     ubyte get();
     /// @brief Read one byte (unsigned 8 bit integer) without pointer move