snappy-sinksource.cc 2.3 KB

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  1. // Copyright 2011 Google Inc. All Rights Reserved.
  2. //
  3. // Redistribution and use in source and binary forms, with or without
  4. // modification, are permitted provided that the following conditions are
  5. // met:
  6. //
  7. // * Redistributions of source code must retain the above copyright
  8. // notice, this list of conditions and the following disclaimer.
  9. // * Redistributions in binary form must reproduce the above
  10. // copyright notice, this list of conditions and the following disclaimer
  11. // in the documentation and/or other materials provided with the
  12. // distribution.
  13. // * Neither the name of Google Inc. nor the names of its
  14. // contributors may be used to endorse or promote products derived from
  15. // this software without specific prior written permission.
  16. //
  17. // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  18. // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  19. // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  20. // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  21. // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  22. // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  23. // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24. // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25. // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26. // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  27. // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28. #include <string.h>
  29. #include "snappy-sinksource.h"
  30. namespace snappy {
  31. Source::~Source() { }
  32. Sink::~Sink() { }
  33. char* Sink::GetAppendBuffer(size_t length, char* scratch) {
  34. return scratch;
  35. }
  36. ByteArraySource::~ByteArraySource() { }
  37. size_t ByteArraySource::Available() const { return left_; }
  38. const char* ByteArraySource::Peek(size_t* len) {
  39. *len = left_;
  40. return ptr_;
  41. }
  42. void ByteArraySource::Skip(size_t n) {
  43. left_ -= n;
  44. ptr_ += n;
  45. }
  46. UncheckedByteArraySink::~UncheckedByteArraySink() { }
  47. void UncheckedByteArraySink::Append(const char* data, size_t n) {
  48. // Do no copying if the caller filled in the result of GetAppendBuffer()
  49. if (data != dest_) {
  50. memcpy(dest_, data, n);
  51. }
  52. dest_ += n;
  53. }
  54. char* UncheckedByteArraySink::GetAppendBuffer(size_t len, char* scratch) {
  55. return dest_;
  56. }
  57. }