1 // Copyright 2008 Google Inc. 2 // Author: Lincoln Smith 3 // 4 // Licensed under the Apache License, Version 2.0 (the "License"); 5 // you may not use this file except in compliance with the License. 6 // You may obtain a copy of the License at 7 // 8 // http://www.apache.org/licenses/LICENSE-2.0 9 // 10 // Unless required by applicable law or agreed to in writing, software 11 // distributed under the License is distributed on an "AS IS" BASIS, 12 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 // See the License for the specific language governing permissions and 14 // limitations under the License. 15 // 16 // A wrapper for the adler32() function from zlib. This can be replaced 17 // with another checksum implementation if desired. 18 19 #ifndef OPEN_VCDIFF_CHECKSUM_H_ 20 #define OPEN_VCDIFF_CHECKSUM_H_ 21 22 #include <config.h> 23 #include "zlib.h" 24 25 namespace open_vcdiff { 26 27 typedef uLong VCDChecksum; 28 29 const VCDChecksum kNoPartialChecksum = 0; 30 31 inline VCDChecksum ComputeAdler32(const char* buffer, 32 size_t size) { 33 return adler32(kNoPartialChecksum, 34 reinterpret_cast<const Bytef*>(buffer), 35 static_cast<uInt>(size)); 36 } 37 38 inline VCDChecksum UpdateAdler32(VCDChecksum partial_checksum, 39 const char* buffer, 40 size_t size) { 41 return adler32(partial_checksum, 42 reinterpret_cast<const Bytef*>(buffer), 43 static_cast<uInt>(size)); 44 } 45 46 } // namespace open_vcdiff 47 48 #endif // OPEN_VCDIFF_CHECKSUM_H_ 49
