Line data    Source code

       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             : 
      29             : #include <string.h>
      30             : 
      31             : #include "snappy-sinksource.h"
      32             : 
      33             : namespace snappy {
      34             : 
      35           0 : Source::~Source() { }
      36             : 
      37           0 : Sink::~Sink() { }
      38             : 
      39           0 : char* Sink::GetAppendBuffer(size_t length, char* scratch) {
      40           0 :   return scratch;
      41             : }
      42             : 
      43           0 : char* Sink::GetAppendBufferVariable(
      44             :       size_t min_size, size_t desired_size_hint, char* scratch,
      45             :       size_t scratch_size, size_t* allocated_size) {
      46           0 :   *allocated_size = scratch_size;
      47           0 :   return scratch;
      48             : }
      49             : 
      50           0 : void Sink::AppendAndTakeOwnership(
      51             :     char* bytes, size_t n,
      52             :     void (*deleter)(void*, const char*, size_t),
      53             :     void *deleter_arg) {
      54           0 :   Append(bytes, n);
      55           0 :   (*deleter)(deleter_arg, bytes, n);
      56           0 : }
      57             : 
      58           0 : ByteArraySource::~ByteArraySource() { }
      59             : 
      60           0 : size_t ByteArraySource::Available() const { return left_; }
      61             : 
      62           0 : const char* ByteArraySource::Peek(size_t* len) {
      63           0 :   *len = left_;
      64           0 :   return ptr_;
      65             : }
      66             : 
      67           0 : void ByteArraySource::Skip(size_t n) {
      68           0 :   left_ -= n;
      69           0 :   ptr_ += n;
      70           0 : }
      71             : 
      72           0 : UncheckedByteArraySink::~UncheckedByteArraySink() { }
      73             : 
      74           0 : void UncheckedByteArraySink::Append(const char* data, size_t n) {
      75             :   // Do no copying if the caller filled in the result of GetAppendBuffer()
      76           0 :   if (data != dest_) {
      77           0 :     memcpy(dest_, data, n);
      78             :   }
      79           0 :   dest_ += n;
      80           0 : }
      81             : 
      82           0 : char* UncheckedByteArraySink::GetAppendBuffer(size_t len, char* scratch) {
      83           0 :   return dest_;
      84             : }
      85             : 
      86           0 : void UncheckedByteArraySink::AppendAndTakeOwnership(
      87             :     char* data, size_t n,
      88             :     void (*deleter)(void*, const char*, size_t),
      89             :     void *deleter_arg) {
      90           0 :   if (data != dest_) {
      91           0 :     memcpy(dest_, data, n);
      92           0 :     (*deleter)(deleter_arg, data, n);
      93             :   }
      94           0 :   dest_ += n;
      95           0 : }
      96             : 
      97           0 : char* UncheckedByteArraySink::GetAppendBufferVariable(
      98             :       size_t min_size, size_t desired_size_hint, char* scratch,
      99             :       size_t scratch_size, size_t* allocated_size) {
     100           0 :   *allocated_size = desired_size_hint;
     101           0 :   return dest_;
     102             : }
     103             : 
     104             : }  // namespace snappy