Add C/C++ FILE* buffer adaptor.

* add function msgpack_fbuffer_write();
* add class msgpack::fbuffer;
* add tests buffer.fbuffer and buffer.fbuffer_c .

src/msgpack/fbuffer.h

@@ -0,0 +1,47 @@
+/*
+ * MessagePack for C FILE* buffer adaptor
+ *
+ * Copyright (C) 2013 Vladimir Volodko
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+#ifndef MSGPACK_FBUFFER_H__
+#define MSGPACK_FBUFFER_H__
+
+#include <stdio.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * @defgroup msgpack_fbuffer FILE* buffer
+ * @ingroup msgpack_buffer
+ * @{
+ */
+
+static inline int msgpack_fbuffer_write(void* data, const char* buf, unsigned int len)
+{
+	return (1 == fwrite(buf, len, 1, (FILE *)data)) ? 0 : -1;
+}
+
+/** @} */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* msgpack/fbuffer.h */
+

src/msgpack/fbuffer.hpp

@@ -0,0 +1,56 @@
+//
+// MessagePack for C++ FILE* buffer adaptor
+//
+// Copyright (C) 2013 Vladimir Volodko
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//
+#ifndef MSGPACK_FBUFFER_HPP__
+#define MSGPACK_FBUFFER_HPP__
+
+#include <cstdio>
+#include <stdexcept>
+
+namespace msgpack {
+
+
+class fbuffer {
+public:
+	fbuffer(FILE* file) : m_file(file) { }
+
+public:
+	void write(const char* buf, unsigned int len)
+	{
+		if (1 != fwrite(buf, len, 1, m_file)) {
+			throw std::runtime_error("fwrite() failed");
+		}
+	}
+
+	FILE* file() const
+	{
+		return m_file;
+	}
+
+private:
+	fbuffer(const fbuffer&);
+	fbuffer& operator= (const fbuffer&);
+
+private:
+	FILE* m_file;
+};
+
+
+}  // namespace msgpack
+
+#endif /* msgpack/fbuffer.hpp */
+

test/buffer.cc

@@ -1,4 +1,6 @@
 #include <msgpack.hpp>
+#include <msgpack/fbuffer.hpp>
+#include <msgpack/fbuffer.h>
 #include <msgpack/zbuffer.hpp>
 #include <gtest/gtest.h>
 #include <string.h>
@@ -70,3 +72,47 @@ TEST(buffer, zbuffer)
 	zbuf.flush();
 }
 
+
+TEST(buffer, fbuffer)
+{
+	FILE* file = tmpfile();
+	EXPECT_TRUE( file != NULL );
+
+	msgpack::fbuffer fbuf(file);
+	EXPECT_EQ(file, fbuf.file());
+
+	fbuf.write("a", 1);
+	fbuf.write("a", 1);
+	fbuf.write("a", 1);
+
+	fflush(file);
+	rewind(file);
+	for (size_t i=0; i < 3; ++i) {
+		int ch = fgetc(file);
+		EXPECT_TRUE(ch != EOF);
+		EXPECT_EQ('a', static_cast<char>(ch));
+	}
+	EXPECT_EQ(EOF, fgetc(file));
+}
+
+
+TEST(buffer, fbuffer_c)
+{
+	FILE* file = tmpfile();
+	void* fbuf = (void*)file;
+
+	EXPECT_TRUE( file != NULL );
+	EXPECT_EQ(0, msgpack_fbuffer_write(fbuf, "a", 1));
+	EXPECT_EQ(0, msgpack_fbuffer_write(fbuf, "a", 1));
+	EXPECT_EQ(0, msgpack_fbuffer_write(fbuf, "a", 1));
+
+	fflush(file);
+	rewind(file);
+	for (size_t i=0; i < 3; ++i) {
+		int ch = fgetc(file);
+		EXPECT_TRUE(ch != EOF);
+		EXPECT_EQ('a', (char) ch);
+	}
+	EXPECT_EQ(EOF, fgetc(file));
+}
+