From a6a2a6281218688de7a74a9cd2a426aad3fe2da2 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Sun, 1 Feb 2015 01:38:20 +0100
Subject: More convenient tag access

---
 src/NBT/CompoundTag.hpp | 22 +++++++++++++++---
 src/NBT/ListTag.hpp     |  2 +-
 src/NBT/StringTag.hpp   |  4 ++++
 src/NBT/Tag.cpp         | 61 +++++++++++++++++++++++++++++++++++++++++++++++--
 src/NBT/Tag.hpp         |  7 ++++--
 5 files changed, 88 insertions(+), 8 deletions(-)

(limited to 'src/NBT')

diff --git a/src/NBT/CompoundTag.hpp b/src/NBT/CompoundTag.hpp
index 99bbd94..18de1c6 100644
--- a/src/NBT/CompoundTag.hpp
+++ b/src/NBT/CompoundTag.hpp
@@ -39,15 +39,15 @@ class CompoundTag : public Tag {
 private:
 	friend class Tag;
 
-	std::unordered_map<std::string, std::shared_ptr<Tag>> value;
+	std::unordered_map<std::string, std::shared_ptr<const Tag>> values;
 
 	CompoundTag(Buffer *buffer) {
 		while (true) {
-			std::pair<std::string, std::shared_ptr<Tag>> v = Tag::readNamedTag(buffer);
+			std::pair<std::string, std::shared_ptr<const Tag>> v = Tag::readNamedTag(buffer);
 			if (v.second->getType() == Type::End)
 				break;
 
-			value.insert(std::move(v));
+			values.insert(std::move(v));
 		}
 	}
 
@@ -55,6 +55,22 @@ public:
 	virtual Type getType() const {
 		return Type::Compound;
 	}
+
+	const std::unordered_map<std::string, std::shared_ptr<const Tag>> & getValues() const {
+		return values;
+	}
+
+	const std::shared_ptr<const Tag> & get(const std::string &key) const {
+		return values.at(key);
+	}
+
+	template<typename... Args> const std::shared_ptr<const Tag> & get(const std::string &key, const Args &...args) const {
+		std::shared_ptr<const CompoundTag> tag = std::dynamic_pointer_cast<const CompoundTag>(get(key));
+		if (!tag)
+			return std::shared_ptr<Tag>(nullptr);
+
+		tag->get(args...);
+	}
 };
 
 }
diff --git a/src/NBT/ListTag.hpp b/src/NBT/ListTag.hpp
index 6404065..67ba619 100644
--- a/src/NBT/ListTag.hpp
+++ b/src/NBT/ListTag.hpp
@@ -38,7 +38,7 @@ class ListTag : public Tag {
 private:
 	friend class Tag;
 
-	std::vector<std::shared_ptr<Tag>> value;
+	std::vector<std::shared_ptr<const Tag>> value;
 
 
 	ListTag(Buffer *buffer) {
diff --git a/src/NBT/StringTag.hpp b/src/NBT/StringTag.hpp
index a120183..0144081 100644
--- a/src/NBT/StringTag.hpp
+++ b/src/NBT/StringTag.hpp
@@ -49,6 +49,10 @@ public:
 	virtual Type getType() const {
 		return Type::String;
 	}
+
+	const std::string & getValue() const {
+		return value;
+	}
 };
 
 }
diff --git a/src/NBT/Tag.cpp b/src/NBT/Tag.cpp
index fddfc4e..a2d57e3 100644
--- a/src/NBT/Tag.cpp
+++ b/src/NBT/Tag.cpp
@@ -46,7 +46,7 @@
 namespace MinedMap {
 namespace NBT {
 
-std::shared_ptr<Tag> Tag::readTag(Type type, Buffer *buffer) {
+std::shared_ptr<const Tag> Tag::readTag(Type type, Buffer *buffer) {
 	switch (type) {
 	case Type::End:
 		return std::shared_ptr<EndTag>(new EndTag());
@@ -89,7 +89,7 @@ std::shared_ptr<Tag> Tag::readTag(Type type, Buffer *buffer) {
 	}
 }
 
-std::pair<std::string, std::shared_ptr<Tag>> Tag::readNamedTag(Buffer *buffer) {
+std::pair<std::string, std::shared_ptr<const Tag>> Tag::readNamedTag(Buffer *buffer) {
 	Type type = static_cast<Type>(buffer->get());
 	if (type == Type::End)
 		return std::make_pair("", std::shared_ptr<EndTag>(new EndTag()));
@@ -101,5 +101,62 @@ std::pair<std::string, std::shared_ptr<Tag>> Tag::readNamedTag(Buffer *buffer) {
 	return std::make_pair(name, readTag(type, buffer));
 }
 
+std::ostream& operator<<(std::ostream& os, Tag::Type type) {
+	switch (type) {
+	case Tag::Type::End:
+		os << "End";
+		break;
+
+	case Tag::Type::Byte:
+		os << "Byte";
+		break;
+
+	case Tag::Type::Short:
+		os << "Short";
+		break;
+
+	case Tag::Type::Int:
+		os << "Int";
+		break;
+
+	case Tag::Type::Long:
+		os << "Long";
+		break;
+
+	case Tag::Type::Float:
+		os << "Float";
+		break;
+
+	case Tag::Type::Double:
+		os << "Double";
+		break;
+
+	case Tag::Type::ByteArray:
+		os << "ByteArray";
+		break;
+
+	case Tag::Type::String:
+		os << "String";
+		break;
+
+	case Tag::Type::List:
+		os << "List";
+		break;
+
+	case Tag::Type::Compound:
+		os << "Compound";
+		break;
+
+	case Tag::Type::IntArray:
+		os << "IntArray";
+		break;
+
+	default:
+		os.setstate(std::ios_base::failbit);
+	}
+
+	return os;
+}
+
 }
 }
diff --git a/src/NBT/Tag.hpp b/src/NBT/Tag.hpp
index 0d25299..077c508 100644
--- a/src/NBT/Tag.hpp
+++ b/src/NBT/Tag.hpp
@@ -28,6 +28,7 @@
 
 #include <cstdint>
 #include <memory>
+#include <ostream>
 
 #include "../Buffer.hpp"
 
@@ -52,14 +53,16 @@ public:
 		IntArray = 11,
 	};
 
-	static std::shared_ptr<Tag> readTag(Type type, Buffer *buffer);
+	static std::shared_ptr<const Tag> readTag(Type type, Buffer *buffer);
 
-	static std::pair<std::string, std::shared_ptr<Tag>> readNamedTag(Buffer *buffer);
+	static std::pair<std::string, std::shared_ptr<const Tag>> readNamedTag(Buffer *buffer);
 
 	virtual Type getType() const = 0;
 
 	virtual ~Tag() {}
 };
 
+std::ostream& operator<<(std::ostream& os, Tag::Type type);
+
 }
 }
-- 
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