// Copyright 2011 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 <string.h> #include "snappy-sinksource.h" namespace snappy { Source::~Source() { } Sink::~Sink() { } char* Sink::GetAppendBuffer(size_t length, char* scratch) { return scratch; } char* Sink::GetAppendBufferVariable( size_t min_size, size_t desired_size_hint, char* scratch, size_t scratch_size, size_t* allocated_size) { *allocated_size = scratch_size; return scratch; } void Sink::AppendAndTakeOwnership( char* bytes, size_t n, void (*deleter)(void*, const char*, size_t), void *deleter_arg) { Append(bytes, n); (*deleter)(deleter_arg, bytes, n); } ByteArraySource::~ByteArraySource() { } size_t ByteArraySource::Available() const { return left_; } const char* ByteArraySource::Peek(size_t* len) { *len = left_; return ptr_; } void ByteArraySource::Skip(size_t n) { left_ -= n; ptr_ += n; } UncheckedByteArraySink::~UncheckedByteArraySink() { } void UncheckedByteArraySink::Append(const char* data, size_t n) { // Do no copying if the caller filled in the result of GetAppendBuffer() if (data != dest_) { memcpy(dest_, data, n); } dest_ += n; } char* UncheckedByteArraySink::GetAppendBuffer(size_t len, char* scratch) { return dest_; } void UncheckedByteArraySink::AppendAndTakeOwnership( char* data, size_t n, void (*deleter)(void*, const char*, size_t), void *deleter_arg) { if (data != dest_) { memcpy(dest_, data, n); (*deleter)(deleter_arg, data, n); } dest_ += n; } char* UncheckedByteArraySink::GetAppendBufferVariable( size_t min_size, size_t desired_size_hint, char* scratch, size_t scratch_size, size_t* allocated_size) { *allocated_size = desired_size_hint; return dest_; } } // namespace snappy