xrootd
XrdCksCalccrc32.hh
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1 #ifndef __XRDCKSCALCCRC32_HH__
2 #define __XRDCKSCALCCRC32_HH__
3 /******************************************************************************/
4 /* */
5 /* X r d C k s C a l c c r c 3 2 . h h */
6 /* */
7 /* (c) 2011 by the Board of Trustees of the Leland Stanford, Jr., University */
8 /* All Rights Reserved */
9 /* Produced by Andrew Hanushevsky for Stanford University under contract */
10 /* DE-AC02-76-SFO0515 with the Department of Energy */
11 /* */
12 /* This file is part of the XRootD software suite. */
13 /* */
14 /* XRootD is free software: you can redistribute it and/or modify it under */
15 /* the terms of the GNU Lesser General Public License as published by the */
16 /* Free Software Foundation, either version 3 of the License, or (at your */
17 /* option) any later version. */
18 /* */
19 /* XRootD is distributed in the hope that it will be useful, but WITHOUT */
20 /* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or */
21 /* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public */
22 /* License for more details. */
23 /* */
24 /* You should have received a copy of the GNU Lesser General Public License */
25 /* along with XRootD in a file called COPYING.LESSER (LGPL license) and file */
26 /* COPYING (GPL license). If not, see <http://www.gnu.org/licenses/>. */
27 /* */
28 /* The copyright holder's institutional names and contributor's names may not */
29 /* be used to endorse or promote products derived from this software without */
30 /* specific prior written permission of the institution or contributor. */
31 /******************************************************************************/
32 
33 #include <string.h>
34 #include <sys/types.h>
35 #include <netinet/in.h>
36 #include <inttypes.h>
37 
38 #include "XrdCks/XrdCksCalc.hh"
39 #include "XrdSys/XrdSysPlatform.hh"
40 
42 {
43 public:
44 
45 char *Final() {char buff[sizeof(long long)];
46  long long tLcs = TotLen;
47  int i = 0;
48  if (tLcs)
49  {while(tLcs) {buff[i++] = tLcs & 0xff ; tLcs >>= 8;}
50  Update(buff, i);
51  }
53 #ifndef Xrd_Big_Endian
54  TheResult = htonl(TheResult);
55 #endif
56  return (char *)&TheResult;
57  }
58 
59 void Init() {C32Result = CRC32_XINIT; TotLen = 0;}
60 
62 
63 void Update(const char *Buff, int BLen);
64 
65 const char *Type(int &csSz) {csSz = sizeof(TheResult); return "crc32";}
66 
68 virtual ~XrdCksCalccrc32() {}
69 
70 private:
71 static const unsigned int CRC32_XINIT = 0;
72 static const unsigned int CRC32_XOROT = 0xffffffff;
73 static unsigned int crctable[256];
74  unsigned int C32Result;
75  unsigned int TheResult;
76  long long TotLen;
77 };
78 #endif
static const unsigned int CRC32_XINIT
Definition: XrdCksCalccrc32.hh:71
virtual ~XrdCksCalccrc32()
Definition: XrdCksCalccrc32.hh:68
unsigned int C32Result
Definition: XrdCksCalccrc32.hh:74
static const unsigned int CRC32_XOROT
Definition: XrdCksCalccrc32.hh:72
Definition: XrdCksCalc.hh:39
const char * Type(int &csSz)
Definition: XrdCksCalccrc32.hh:65
unsigned int TheResult
Definition: XrdCksCalccrc32.hh:75
XrdCksCalc * New()
Definition: XrdCksCalccrc32.hh:61
void Init()
Definition: XrdCksCalccrc32.hh:59
void Update(const char *Buff, int BLen)
XrdCksCalccrc32()
Definition: XrdCksCalccrc32.hh:67
static unsigned int crctable[256]
Definition: XrdCksCalccrc32.hh:73
char * Final()
Definition: XrdCksCalccrc32.hh:45
long long TotLen
Definition: XrdCksCalccrc32.hh:76
Definition: XrdCksCalccrc32.hh:41