initial imple of byte buffer and slice

1 files changed, 73 insertions, 0 deletions

diff --git a/src/cpp/util/byte_buffer.cc b/src/cpp/util/byte_buffer.cc
index 3846156ae3..ac2657472c 100644
--- a/src/cpp/util/byte_buffer.cc
+++ b/src/cpp/util/byte_buffer.cc
@@ -1,2 +1,75 @@
+/*
+ *
+ * Copyright 2015, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
 
 #include <grpc++/byte_buffer.h>
+
+namespace grpc {
+
+ByteBuffer::ByteBuffer(Slice* slices, size_t nslices) {
+  // TODO(yangg) maybe expose some core API to simplify this
+  std::vector<gpr_slice> c_slices(nslices);
+  for (size_t i = 0; i < nslices; i++) {
+    c_slices[i] = slices[i].slice_;
+  }
+  buffer_ = grpc_byte_buffer_create(c_slices.data(), nslices);
+}
+
+void ByteBuffer::Clear() {
+  if (buffer_) {
+    grpc_byte_buffer_destroy(buffer_);
+    buffer_ = nullptr;
+  }
+}
+
+void ByteBuffer::Dump(std::vector<Slice>* slices) {
+  slices->clear();
+  if (!buffer_) {
+    return;
+  }
+  grpc_byte_buffer_reader* reader = grpc_byte_buffer_reader_create(buffer_);
+  gpr_slice s;
+  while (grpc_byte_buffer_reader_next(reader, &s)) {
+    slices->push_back(Slice(s, Slice::STEAL_REF));
+  }
+  grpc_byte_buffer_reader_destroy(reader);
+}
+
+size_t ByteBuffer::Length() {
+  if (buffer_) {
+    return grpc_byte_buffer_length(buffer_);
+  } else {
+    return 0;
+  }
+}
+
+}  // namespace grpc