From 38693e1d6ca7f05d9488348ddf298488d1cc0995 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Sun, 6 Sep 2015 23:35:58 +0200
Subject: GH-1047 parse world files and integrate MCEdit with world page

---
 depends/libnbtplusplus/include/io/stream_writer.h | 122 ++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 depends/libnbtplusplus/include/io/stream_writer.h

(limited to 'depends/libnbtplusplus/include/io/stream_writer.h')

diff --git a/depends/libnbtplusplus/include/io/stream_writer.h b/depends/libnbtplusplus/include/io/stream_writer.h
new file mode 100644
index 00000000..8938b73b
--- /dev/null
+++ b/depends/libnbtplusplus/include/io/stream_writer.h
@@ -0,0 +1,122 @@
+/*
+ * libnbt++ - A library for the Minecraft Named Binary Tag format.
+ * Copyright (C) 2013, 2015  ljfa-ag
+ *
+ * This file is part of libnbt++.
+ *
+ * libnbt++ is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * libnbt++ is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with libnbt++.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef STREAM_WRITER_H_INCLUDED
+#define STREAM_WRITER_H_INCLUDED
+
+#include "tag.h"
+#include "endian_str.h"
+#include <iosfwd>
+
+#include "nbt++_export.h"
+
+namespace nbt
+{
+namespace io
+{
+
+/* Not sure if that is even needed
+///Exception that gets thrown when writing is not successful
+class output_error : public std::runtime_error
+{
+    using std::runtime_error::runtime_error;
+};*/
+
+/**
+* @brief Writes a named tag into the stream, including the tag type
+* @param key the name of the tag
+* @param t the tag
+* @param os the stream to write to
+* @param e the byte order of the written data. The Java edition
+* of Minecraft uses Big Endian, the Pocket edition uses Little Endian
+*/
+NBT___EXPORT void write_tag(const std::string& key, const tag& t, std::ostream& os, endian::endian e = endian::big);
+
+/**
+ * @brief Helper class for writing NBT tags to output streams
+ *
+ * Can be reused to write multiple tags
+ */
+class NBT___EXPORT stream_writer
+{
+public:
+    ///Maximum length of an NBT string (16 bit unsigned)
+    static constexpr size_t max_string_len = UINT16_MAX;
+    ///Maximum length of an NBT list or array (32 bit signed)
+    static constexpr uint32_t max_array_len = INT32_MAX;
+
+    /**
+     * @param os the stream to write to
+     * @param e the byte order of the written data. The Java edition
+     * of Minecraft uses Big Endian, the Pocket edition uses Little Endian
+     */
+    explicit stream_writer(std::ostream& os, endian::endian e = endian::big) noexcept:
+        os(os), endian(e)
+    {}
+
+    ///Returns the stream
+    std::ostream& get_ostr() const { return os; }
+    ///Returns the byte order
+    endian::endian get_endian() const { return endian; }
+
+    /**
+     * @brief Writes a named tag into the stream, including the tag type
+     */
+    void write_tag(const std::string& key, const tag& t);
+
+    /**
+     * @brief Writes the given tag's payload into the stream
+     */
+    void write_payload(const tag& t) { t.write_payload(*this); }
+
+    /**
+     * @brief Writes a tag type to the stream
+     */
+    void write_type(tag_type tt) { write_num(static_cast<int8_t>(tt)); }
+
+    /**
+     * @brief Writes a binary number to the stream
+     */
+    template<class T>
+    void write_num(T x);
+
+    /**
+     * @brief Writes an NBT string to the stream
+     *
+     * An NBT string consists of two bytes indicating the length, followed by
+     * the characters encoded in modified UTF-8.
+     * @throw std::length_error if the string is too long for NBT
+     */
+    void write_string(const std::string& str);
+
+private:
+    std::ostream& os;
+    const endian::endian endian;
+};
+
+template<class T>
+void stream_writer::write_num(T x)
+{
+    endian::write(os, x, endian);
+}
+
+}
+}
+
+#endif // STREAM_WRITER_H_INCLUDED
-- 
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