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122 lines
3.7 KiB
C++
122 lines
3.7 KiB
C++
// Copyright 2011 Google Inc. All Rights Reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stddef.h>
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#include <cstring>
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#include "snappy-sinksource.h"
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namespace snappy {
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Source::~Source() = default;
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Sink::~Sink() = default;
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char* Sink::GetAppendBuffer(size_t length, char* scratch) {
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// TODO: Switch to [[maybe_unused]] when we can assume C++17.
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(void)length;
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return scratch;
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}
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char* Sink::GetAppendBufferVariable(
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size_t min_size, size_t desired_size_hint, char* scratch,
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size_t scratch_size, size_t* allocated_size) {
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// TODO: Switch to [[maybe_unused]] when we can assume C++17.
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(void)min_size;
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(void)desired_size_hint;
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*allocated_size = scratch_size;
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return scratch;
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}
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void Sink::AppendAndTakeOwnership(
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char* bytes, size_t n,
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void (*deleter)(void*, const char*, size_t),
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void *deleter_arg) {
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Append(bytes, n);
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(*deleter)(deleter_arg, bytes, n);
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}
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ByteArraySource::~ByteArraySource() = default;
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size_t ByteArraySource::Available() const { return left_; }
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const char* ByteArraySource::Peek(size_t* len) {
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*len = left_;
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return ptr_;
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}
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void ByteArraySource::Skip(size_t n) {
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left_ -= n;
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ptr_ += n;
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}
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UncheckedByteArraySink::~UncheckedByteArraySink() { }
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void UncheckedByteArraySink::Append(const char* data, size_t n) {
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// Do no copying if the caller filled in the result of GetAppendBuffer()
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if (data != dest_) {
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std::memcpy(dest_, data, n);
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}
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dest_ += n;
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}
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char* UncheckedByteArraySink::GetAppendBuffer(size_t len, char* scratch) {
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// TODO: Switch to [[maybe_unused]] when we can assume C++17.
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(void)len;
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(void)scratch;
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return dest_;
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}
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void UncheckedByteArraySink::AppendAndTakeOwnership(
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char* bytes, size_t n,
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void (*deleter)(void*, const char*, size_t),
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void *deleter_arg) {
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if (bytes != dest_) {
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std::memcpy(dest_, bytes, n);
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(*deleter)(deleter_arg, bytes, n);
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}
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dest_ += n;
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}
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char* UncheckedByteArraySink::GetAppendBufferVariable(
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size_t min_size, size_t desired_size_hint, char* scratch,
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size_t scratch_size, size_t* allocated_size) {
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// TODO: Switch to [[maybe_unused]] when we can assume C++17.
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(void)min_size;
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(void)scratch;
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(void)scratch_size;
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*allocated_size = desired_size_hint;
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return dest_;
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}
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} // namespace snappy
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