Add Tag print functions and nbtdump tool

src/NBT/ByteArrayTag.hpp

@@ -51,6 +51,24 @@ public:
 		return Type::ByteArray;
 	}
 
+	virtual void print(std::ostream& os, const std::string &indent) const {
+		os << "(" << len << ") [" << std::endl;
+
+		std::string inner = indent + "  ";
+
+		for (size_t i = 0; i < len; i++) {
+			uint8_t v = value[i];
+
+			os << inner
+			   << (unsigned)v << " / "
+			   << (int)(int8_t)v << " / "
+			   << std::hex << "0x" << (unsigned)v << std::dec
+			   << std::endl;
+		}
+
+		os << indent << "]";
+	}
+
 	uint32_t getLength() const {
 		return len;
 	}

src/NBT/ByteTag.hpp

@@ -47,6 +47,12 @@ public:
 		return Type::Byte;
 	}
 
+	virtual void print(std::ostream& os, const std::string &) const {
+		os << (unsigned)getValue() << " / "
+		   << (int)(int8_t)getValue() << " / "
+		   << std::hex << "0x" << (unsigned)getValue() << std::dec;
+	}
+
 	uint8_t getValue() const {
 		return value;
 	}

src/NBT/CompoundTag.hpp

@@ -54,6 +54,20 @@ public:
 		return Type::Compound;
 	}
 
+	virtual void print(std::ostream& os, const std::string &indent) const {
+		os << "{" << std::endl;
+
+		std::string inner = indent + "  ";
+
+		for (const auto &item : *this) {
+			os << inner << item.first << ": " << item.second->getType() << " ";
+			item.second->print(os, inner);
+			os << std::endl;
+		}
+
+		os << indent << "}";
+	}
+
 	template<typename T> std::shared_ptr<const T> get(const std::string &key) const {
 		auto it = find(key);
 		if (it == end())

src/NBT/DoubleTag.hpp

@@ -46,6 +46,16 @@ public:
 	virtual Type getType() const {
 		return Type::Double;
 	}
+
+	virtual void print(std::ostream& os, const std::string &) const {
+		union {
+			uint64_t i;
+			double d;
+		};
+
+		i = Buffer::parse64(ptr);
+		os << d;
+	}
 };
 
 }

src/NBT/EndTag.hpp

@@ -42,6 +42,9 @@ public:
 	virtual Type getType() const {
 		return Type::End;
 	}
+
+	virtual void print(std::ostream&, const std::string &) const {
+	}
 };
 
 }

src/NBT/FloatTag.hpp

@@ -46,6 +46,16 @@ public:
 	virtual Type getType() const {
 		return Type::Float;
 	}
+
+	virtual void print(std::ostream& os, const std::string &) const {
+		union {
+			uint32_t i;
+			float f;
+		};
+
+		i = Buffer::parse32(ptr);
+		os << f;
+	}
 };
 
 }

src/NBT/IntArrayTag.hpp

@@ -50,6 +50,24 @@ public:
 	virtual Type getType() const {
 		return Type::IntArray;
 	}
+
+	virtual void print(std::ostream& os, const std::string &indent) const {
+		os << "(" << len << ") [" << std::endl;
+
+		std::string inner = indent + "  ";
+
+		for (size_t i = 0; i < len; i++) {
+			uint32_t v = Buffer::parse32(&ptr[4*i]);
+
+			os << inner
+			   << v << " / "
+			   << (int32_t)v << " / "
+			   << std::hex << "0x" << v << std::dec
+			   << std::endl;
+		}
+
+		os << indent << "]";
+	}
 };
 
 }

src/NBT/IntTag.hpp

@@ -47,6 +47,12 @@ public:
 		return Type::Int;
 	}
 
+	virtual void print(std::ostream& os, const std::string &) const {
+		os << getValue() << " / "
+		   << (int32_t)getValue() << " / "
+		   << std::hex << "0x" << getValue() << std::dec;
+	}
+
 	uint32_t getValue() const {
 		return Buffer::parse32(ptr);
 	}

src/NBT/ListTag.hpp

@@ -65,6 +65,20 @@ public:
 	virtual Type getSubtype() const {
 		return type;
 	}
+
+	virtual void print(std::ostream& os, const std::string &indent) const {
+		os << getSubtype() << " [" << std::endl;
+
+		std::string inner = indent + "  ";
+
+		for (const auto &item : *this) {
+			os << inner;
+			item->print(os, inner);
+			os << std::endl;
+		}
+
+		os << indent << "]";
+	}
 };
 
 }

src/NBT/LongTag.hpp

@@ -47,6 +47,12 @@ public:
 		return Type::Long;
 	}
 
+	virtual void print(std::ostream& os, const std::string &) const {
+		os << getValue() << " / "
+		   << (int64_t)getValue() << " / "
+		   << std::hex << "0x" << getValue() << std::dec;
+	}
+
 	uint64_t getValue() const {
 		return Buffer::parse64(ptr);
 	}

src/NBT/ShortTag.hpp

@@ -47,6 +47,12 @@ public:
 		return Type::Short;
 	}
 
+	virtual void print(std::ostream& os, const std::string &) const {
+		os << getValue() << " / "
+		   << (int16_t)getValue() << " / "
+		   << std::hex << "0x" << getValue() << std::dec;
+	}
+
 	uint16_t getValue() const {
 		return Buffer::parse16(ptr);
 	}

src/NBT/StringTag.hpp

@@ -48,6 +48,10 @@ public:
 	virtual Type getType() const {
 		return Type::String;
 	}
+
+	virtual void print(std::ostream& os, const std::string &) const {
+		os << "\"" << std::string(reinterpret_cast<const char *>(ptr), len) << "\"";
+	}
 };
 
 }

src/NBT/Tag.hpp

@@ -60,11 +60,18 @@ public:
 	static std::pair<std::string, std::shared_ptr<const Tag>> readNamedTag(Buffer *buffer);
 
 	virtual Type getType() const = 0;
+	virtual void print(std::ostream& os, const std::string &indent) const = 0;
 
 	virtual ~Tag() {}
 };
 
 std::ostream& operator<<(std::ostream& os, Tag::Type type);
 
+static inline std::ostream& operator<<(std::ostream& os, const Tag &tag) {
+	os << tag.getType() << " ";
+	tag.print(os, "");
+	return os;
+}
+
 }
 }