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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_ = this->buffer_;
this->buffer_ = tmp;
}
} // namespace grpc
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