c binding: add msgpack_sbuffer

git-svn-id: file:///Users/frsyuki/project/msgpack-git/svn/x@98 5a5092ae-2292-43ba-b2d5-dcab9c1a2731

1 files changed, 68 insertions, 0 deletions

diff --git a/c/sbuffer.h b/c/sbuffer.h
new file mode 100644
index 0000000..3694dbd
--- /dev/null
+++ b/c/sbuffer.h
@@ -0,0 +1,68 @@
+/*
+ * MessagePack for C simple 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_SBUFFER_H__
+#define MSGPACK_SBUFFER_H__
+
+#include <stdlib.h>
+#include <string.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct {
+	char* ptr;
+	size_t size;
+	size_t capacity;
+} msgpack_sbuffer;
+
+static inline void msgpack_sbuffer_init(msgpack_sbuffer* sbuf)
+{
+	memset(sbuf, 0, sizeof(msgpack_sbuffer));
+}
+
+static inline void msgpack_sbuffer_destroy(msgpack_sbuffer* sbuf)
+{
+	free(sbuf->ptr);
+}
+
+static inline int msgpack_sbuffer_write(void* data, const char* buf, unsigned int len)
+{
+	msgpack_sbuffer* sbuf = (msgpack_sbuffer*)data;
+	if(sbuf->capacity - sbuf->size < len) {
+		size_t nsize = (sbuf->capacity ? sbuf->capacity*2 : 2048);
+		while(nsize < sbuf->size + len) { nsize *= 2; }
+
+		void* tmp = realloc(sbuf->ptr, nsize);
+		if(!tmp) { return -1; }
+
+		sbuf->ptr = (char*)tmp;
+		sbuf->capacity = nsize;
+	}
+	memcpy(sbuf->ptr + sbuf->size, buf, len);
+	sbuf->size += len;
+	return 0;
+}
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* msgpack/sbuffer.h */
+