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Unified Diff: net/quic/quic_data_writer.cc

Issue 11125002: Add QuicFramer and friends. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Remove logging Created 8 years, 2 months ago
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Index: net/quic/quic_data_writer.cc
diff --git a/net/quic/quic_data_writer.cc b/net/quic/quic_data_writer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4640ea16cbecb14e57a6f71284746ee239d6e4ea
--- /dev/null
+++ b/net/quic/quic_data_writer.cc
@@ -0,0 +1,69 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/quic/quic_data_writer.h"
+
+#include <algorithm>
+#include <limits>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "net/quic/quic_protocol.h"
+
+using std::numeric_limits;
+
+namespace net {
+
+QuicDataWriter::QuicDataWriter(size_t size)
+ : buffer_(new char[size]),
+ capacity_(size),
+ length_(0) {
+}
+
+QuicDataWriter::~QuicDataWriter() {
+ delete[] buffer_;
+}
+
+char* QuicDataWriter::BeginWrite(size_t length) {
+ if (length_ + length > capacity_) {
jar (doing other things) 2012/10/16 19:24:01 nit: To avoid integer overflow confusion, I think
Ryan Hamilton 2012/10/16 19:43:23 Ah, I see. I didn't realize that was why you wrot
+ return NULL;
+ }
+
+#ifdef ARCH_CPU_64_BITS
+ DCHECK_LE(length, numeric_limits<uint32>::max());
+#endif
+
+ return buffer_ + length_;
+}
+
+bool QuicDataWriter::AdvancePointer(uint32 len) {
+ if (!BeginWrite(len)) {
+ return false;
+ }
+ length_ += len;
+ return true;
+}
+
+bool QuicDataWriter::WriteBytes(const void* data, uint32 data_len) {
+ char* dest = BeginWrite(data_len);
+ if (!dest) {
+ return false;
+ }
+
+ memcpy(dest, data, data_len);
+
+ length_ += data_len;
+ return true;
+}
+
+void QuicDataWriter::WriteUint64ToBuffer(uint64 value, char* buffer) {
+ memcpy(buffer, &value, sizeof(value));
+}
+
+void QuicDataWriter::WriteUint128ToBuffer(uint128 value, char* buffer) {
+ WriteUint64ToBuffer(value.lo, buffer);
+ WriteUint64ToBuffer(value.hi, buffer + sizeof(value.lo));
+}
+
+} // namespace net
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