move buffer to kernel. extract ISrsReader for buffer

trunk/src/kernel/srs_kernel_buffer.cpp

@@ -0,0 +1,91 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2013-2014 winlin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <srs_kernel_buffer.hpp>
+
+#include <srs_kernel_error.hpp>
+#include <srs_kernel_log.hpp>
+
+#define SOCKET_READ_SIZE 4096
+
+ISrsReader::ISrsReader()
+{
+}
+
+ISrsReader::~ISrsReader()
+{
+}
+
+SrsBuffer::SrsBuffer()
+{
+}
+
+SrsBuffer::~SrsBuffer()
+{
+}
+
+int SrsBuffer::size()
+{
+	return (int)data.size();
+}
+
+char* SrsBuffer::bytes()
+{
+	return &data.at(0);
+}
+
+void SrsBuffer::erase(int size)
+{
+	data.erase(data.begin(), data.begin() + size);
+}
+
+void SrsBuffer::append(char* bytes, int size)
+{
+	data.insert(data.end(), bytes, bytes + size);
+}
+
+int SrsBuffer::ensure_buffer_bytes(ISrsReader* skt, int required_size)
+{
+	int ret = ERROR_SUCCESS;
+
+	if (required_size < 0) {
+		ret = ERROR_SYSTEM_SIZE_NEGATIVE;
+		srs_error("size is negative. size=%d, ret=%d", required_size, ret);
+		return ret;
+	}
+
+	while (size() < required_size) {
+		char buffer[SOCKET_READ_SIZE];
+		
+		ssize_t nread;
+		if ((ret = skt->read(buffer, SOCKET_READ_SIZE, &nread)) != ERROR_SUCCESS) {
+			return ret;
+		}
+		
+		srs_assert((int)nread > 0);
+		append(buffer, (int)nread);
+	}
+	
+	return ret;
+}
+