1 files changed, 111 insertions, 0 deletions
diff --git a/src/cpp/util/byte_buffer_cc.cc b/src/cpp/util/byte_buffer_cc.cc
new file mode 100644
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+++ b/src/cpp/util/byte_buffer_cc.cc
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+/*
+ *
+ * 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++/support/byte_buffer.h>
+#include <grpc/byte_buffer_reader.h>
+
+namespace grpc {
+
+ByteBuffer::ByteBuffer(const Slice* slices, size_t nslices) {
+  // The following assertions check that the representation of a grpc::Slice is
+  // identical to that of a gpr_slice:  it has a gpr_slice field, and nothing
+  // else.
+  static_assert(std::is_same<decltype(slices[0].slice_), gpr_slice>::value,
+                "Slice must have same representation as gpr_slice");
+  static_assert(sizeof(Slice) == sizeof(gpr_slice),
+                "Slice must have same representation as gpr_slice");
+  // The const_cast is legal if grpc_raw_byte_buffer_create() does no more
+  // than its advertised side effect of increasing the reference count of the
+  // slices it processes, and such an increase does not affect the semantics
+  // seen by the caller of this constructor.
+  buffer_ = grpc_raw_byte_buffer_create(
+      reinterpret_cast<gpr_slice*>(const_cast<Slice*>(slices)), nslices);
+}
+
+ByteBuffer::~ByteBuffer() {
+  if (buffer_) {
+    grpc_byte_buffer_destroy(buffer_);
+  }
+}
+
+void ByteBuffer::Clear() {
+  if (buffer_) {
+    grpc_byte_buffer_destroy(buffer_);
+    buffer_ = nullptr;
+  }
+}
+
+Status ByteBuffer::Dump(std::vector<Slice>* slices) const {
+  slices->clear();
+  if (!buffer_) {
+    return Status(StatusCode::FAILED_PRECONDITION, "Buffer not initialized");
+  }
+  grpc_byte_buffer_reader reader;
+  if (!grpc_byte_buffer_reader_init(&reader, buffer_)) {
+    return Status(StatusCode::INTERNAL,
+                  "Couldn't initialize byte buffer reader");
+  }
+  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);
+  return Status::OK;
+}
+
+size_t ByteBuffer::Length() const {
+  if (buffer_) {
+    return grpc_byte_buffer_length(buffer_);
+  } else {
+    return 0;
+  }
+}
+
+ByteBuffer::ByteBuffer(const ByteBuffer& buf)
+    : buffer_(grpc_byte_buffer_copy(buf.buffer_)) {}
+
+ByteBuffer& ByteBuffer::operator=(const ByteBuffer& buf) {
+  Clear();  // first remove existing data
+  if (buf.buffer_) {
+    buffer_ = grpc_byte_buffer_copy(buf.buffer_);  // then copy
+  }
+  return *this;
+}
+
+void ByteBuffer::Swap(ByteBuffer* other) {
+  grpc_byte_buffer* tmp = other->buffer_;
+  other->buffer_ = buffer_;
+  buffer_ = tmp;
+}
+
+}  // namespace grpc