mongodb: checksum.h Source File

00001 
00003 /*    Copyright 2009 10gen Inc.
00004  *
00005  *    Licensed under the Apache License, Version 2.0 (the "License");
00006  *    you may not use this file except in compliance with the License.
00007  *    You may obtain a copy of the License at
00008  *
00009  *    http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  *    Unless required by applicable law or agreed to in writing, software
00012  *    distributed under the License is distributed on an "AS IS" BASIS,
00013  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  *    See the License for the specific language governing permissions and
00015  *    limitations under the License.
00016  */
00017 
00018 #pragma once
00019 
00020 namespace mongoutils {
00021 
00025     inline int checksum( const char* x , int size ) {
00026         int ck = 0;
00027         for ( int i=0; i<size; i++ )
00028             ck += ( (int)x[i] * ( i + 1 ) );
00029         return ck;
00030     }
00031 
00032 }