Landing the open source version of the FLIP server.

BUG=none
TEST=none

Review URL: http://codereview.chromium.org/463009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@33766 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 94 insertions, 0 deletions

diff --git a/net/tools/flip_server/simple_buffer.h b/net/tools/flip_server/simple_buffer.h
new file mode 100644
index 0000000..20d52748
--- /dev/null
+++ b/net/tools/flip_server/simple_buffer.h
@@ -0,0 +1,94 @@
+// Copyright (c) 2009 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.
+
+#ifndef NET_TOOLS_FLIP_SERVER_SIMPLE_BUFFER_H__
+#define NET_TOOLS_FLIP_SERVER_SIMPLE_BUFFER_H__
+
+#include <string>
+
+#include "net/tools/flip_server/buffer_interface.h"
+
+namespace gfe2 {
+
+class SimpleBuffer : public BufferInterface {
+ public:
+  SimpleBuffer();
+  explicit SimpleBuffer(int size);
+  virtual ~SimpleBuffer() {
+    delete[] storage_;
+  }
+
+  string str() const;
+
+  typedef char * iterator;
+  typedef const char * const_iterator;
+
+  iterator begin() { return storage_ + read_idx_; }
+  const_iterator begin() const { return storage_ + read_idx_; }
+
+  iterator end() { return storage_ + write_idx_; }
+  const_iterator end() const { return storage_ + write_idx_; }
+
+  // The following functions all override pure virtual functions
+  // in BufferInterface. See buffer_interface.h for a description
+  // of what they do.
+  virtual int ReadableBytes() const;
+  virtual int BufferSize() const;
+  virtual int BytesFree() const;
+
+  virtual bool Empty() const;
+  virtual bool Full() const;
+
+  virtual int Write(const char* bytes, int size);
+
+  virtual void GetWritablePtr(char **ptr, int* size) const;
+
+  virtual void GetReadablePtr(char **ptr, int* size) const;
+
+  virtual int Read(char* bytes, int size);
+
+  virtual void Clear();
+
+  // This can be an expensive operation: costing a new/delete, and copying of
+  // all existing data. Even if the existing buffer does not need to be
+  // resized, unread data may still need to be non-destructively copied to
+  // consolidate fragmented free space.
+  virtual bool Reserve(int size);
+
+  virtual void AdvanceReadablePtr(int amount_to_advance);
+
+  virtual void AdvanceWritablePtr(int amount_to_advance);
+
+  void Swap(SimpleBuffer* other) {
+    char* tmp = storage_;
+    storage_ = other->storage_;
+    other->storage_ = tmp;
+
+    int tmp_int = write_idx_;
+    write_idx_ = other->write_idx_;
+    other->write_idx_ = tmp_int;
+
+    tmp_int = read_idx_;
+    read_idx_ = other->read_idx_;
+    other->read_idx_ = tmp_int;
+
+    tmp_int = storage_size_;
+    storage_size_ = other->storage_size_;
+    other->storage_size_ = tmp_int;
+  }
+
+ protected:
+  char* storage_;
+  int write_idx_;
+  int read_idx_;
+  int storage_size_;
+
+ private:
+  //DISALLOW_COPY_AND_ASSIGN(SimpleBuffer);
+};
+
+}  // namespace gfe2
+
+#endif  // NET_TOOLS_FLIP_SERVER_SIMPLE_BUFFER_H__
+