Merge branch 'master' of github.com:msgpack/msgpack

1 files changed, 142 insertions, 0 deletions

diff --git a/cpp/src/msgpack/vrefbuffer.h b/cpp/src/msgpack/vrefbuffer.h
new file mode 100644
index 0000000..0643927
--- /dev/null
+++ b/cpp/src/msgpack/vrefbuffer.h
@@ -0,0 +1,142 @@
+/*
+ * MessagePack for C zero-copy buffer implementation
+ *
+ * Copyright (C) 2008-2009 FURUHASHI Sadayuki
+ *
+ *    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_VREFBUFFER_H__
+#define MSGPACK_VREFBUFFER_H__
+
+#include "zone.h"
+#include <stdlib.h>
+
+#ifndef _WIN32
+#include <sys/uio.h>
+#else
+struct iovec {
+	void  *iov_base;
+	size_t iov_len;
+};
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
+/**
+ * @defgroup msgpack_vrefbuffer Vectored Referencing buffer
+ * @ingroup msgpack_buffer
+ * @{
+ */
+
+struct msgpack_vrefbuffer_chunk;
+typedef struct msgpack_vrefbuffer_chunk msgpack_vrefbuffer_chunk;
+
+typedef struct msgpack_vrefbuffer_inner_buffer {
+	size_t free;
+	char*  ptr;
+	msgpack_vrefbuffer_chunk* head;
+} msgpack_vrefbuffer_inner_buffer;
+
+typedef struct msgpack_vrefbuffer {
+	struct iovec* tail;
+	struct iovec* end;
+	struct iovec* array;
+
+	size_t chunk_size;
+	size_t ref_size;
+
+	msgpack_vrefbuffer_inner_buffer inner_buffer;
+} msgpack_vrefbuffer;
+
+
+#ifndef MSGPACK_VREFBUFFER_REF_SIZE
+#define MSGPACK_VREFBUFFER_REF_SIZE 32
+#endif
+
+#ifndef MSGPACK_VREFBUFFER_CHUNK_SIZE
+#define MSGPACK_VREFBUFFER_CHUNK_SIZE 8192
+#endif
+
+bool msgpack_vrefbuffer_init(msgpack_vrefbuffer* vbuf,
+		size_t ref_size, size_t chunk_size);
+void msgpack_vrefbuffer_destroy(msgpack_vrefbuffer* vbuf);
+
+static inline msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size);
+static inline void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf);
+
+static inline int msgpack_vrefbuffer_write(void* data, const char* buf, unsigned int len);
+
+static inline const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref);
+static inline size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref);
+
+int msgpack_vrefbuffer_append_copy(msgpack_vrefbuffer* vbuf,
+		const char* buf, unsigned int len);
+
+int msgpack_vrefbuffer_append_ref(msgpack_vrefbuffer* vbuf,
+		const char* buf, unsigned int len);
+
+int msgpack_vrefbuffer_migrate(msgpack_vrefbuffer* vbuf, msgpack_vrefbuffer* to);
+
+void msgpack_vrefbuffer_clear(msgpack_vrefbuffer* vref);
+
+/** @} */
+
+
+msgpack_vrefbuffer* msgpack_vrefbuffer_new(size_t ref_size, size_t chunk_size)
+{
+	msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)malloc(sizeof(msgpack_vrefbuffer));
+	if(!msgpack_vrefbuffer_init(vbuf, ref_size, chunk_size)) {
+		free(vbuf);
+		return NULL;
+	}
+	return vbuf;
+}
+
+void msgpack_vrefbuffer_free(msgpack_vrefbuffer* vbuf)
+{
+	if(vbuf == NULL) { return; }
+	msgpack_vrefbuffer_destroy(vbuf);
+	free(vbuf);
+}
+
+int msgpack_vrefbuffer_write(void* data, const char* buf, unsigned int len)
+{
+	msgpack_vrefbuffer* vbuf = (msgpack_vrefbuffer*)data;
+
+	if(len < vbuf->ref_size) {
+		return msgpack_vrefbuffer_append_copy(vbuf, buf, len);
+	} else {
+		return msgpack_vrefbuffer_append_ref(vbuf, buf, len);
+	}
+}
+
+const struct iovec* msgpack_vrefbuffer_vec(const msgpack_vrefbuffer* vref)
+{
+	return vref->array;
+}
+
+size_t msgpack_vrefbuffer_veclen(const msgpack_vrefbuffer* vref)
+{
+	return vref->tail - vref->array;
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* msgpack/vrefbuffer.h */
+