shill: Add ByteString class
This can be used to store lumps of bytes. This will be used in
IP Addresses, which will be used in routes.
BUG=chromium-os:17277
TEST=New unittest
Change-Id: Id9a635d9811997e1a734f7fd1c3d24bf37cfd807
Reviewed-on: http://gerrit.chromium.org/gerrit/4179
Reviewed-by: Darin Petkov <petkov@chromium.org>
Tested-by: Paul Stewart <pstew@chromium.org>
diff --git a/byte_string.h b/byte_string.h
new file mode 100644
index 0000000..bfba54e
--- /dev/null
+++ b/byte_string.h
@@ -0,0 +1,54 @@
+// Copyright (c) 2011 The Chromium OS 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 SHILL_BYTE_STRING_
+#define SHILL_BYTE_STRING_
+
+#include <vector>
+
+#include <base/basictypes.h>
+
+namespace shill {
+
+// Provides a holder of a string of bytes
+class ByteString {
+ public:
+ ByteString(const ByteString &b) : data_(b.data_) {}
+ explicit ByteString(size_t length) : data_(length) {}
+ ByteString(const unsigned char *data, size_t length)
+ : data_(data, data + length) {}
+
+ ByteString &operator=(const ByteString &b) {
+ data_ = b.data_;
+ return *this;
+ }
+
+ // Inserts a uint32 into a ByteString in cpu-order
+ static ByteString CreateFromCPUUInt32(uint32 val);
+ // Inserts a uint32 into a ByteString in network-order
+ static ByteString CreateFromNetUInt32(uint32 val);
+
+ unsigned char *GetData() { return data_.data(); }
+ const unsigned char *GetConstData() const { return data_.data(); }
+ size_t GetLength() const { return data_.size(); }
+
+ // Converts to a uint32 from a host-order value stored in the ByteString
+ // Returns true on success
+ bool ConvertToCPUUInt32(uint32 *val) const;
+ // Converts to a uint32 from a network-order value stored in the ByteString
+ // Returns true on success
+ bool ConvertToNetUInt32(uint32 *val) const;
+
+ bool IsZero() const;
+ bool Equals(const ByteString &b) const;
+
+ private:
+ std::vector<unsigned char> data_;
+ // NO DISALLOW_COPY_AND_ASSIGN -- we assign ByteStrings in STL hashes
+};
+
+} // namespace shill
+
+
+#endif // SHILL_BYTE_STRING_