Annotation of libelwix/inc/elwix/acrc.h, revision 1.1.1.1
1.1 misho 1: /*************************************************************************
2: * (C) 2013 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
3: * by Michael Pounov <misho@elwix.org>
4: *
5: * $Author: misho $
6: * $Id: global.h,v 1.13 2012/08/29 13:51:29 misho Exp $
7: *
8: **************************************************************************
9: The ELWIX and AITNET software is distributed under the following
10: terms:
11:
12: All of the documentation and software included in the ELWIX and AITNET
13: Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
14:
15: Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013
16: by Michael Pounov <misho@elwix.org>. All rights reserved.
17:
18: Redistribution and use in source and binary forms, with or without
19: modification, are permitted provided that the following conditions
20: are met:
21: 1. Redistributions of source code must retain the above copyright
22: notice, this list of conditions and the following disclaimer.
23: 2. Redistributions in binary form must reproduce the above copyright
24: notice, this list of conditions and the following disclaimer in the
25: documentation and/or other materials provided with the distribution.
26: 3. All advertising materials mentioning features or use of this software
27: must display the following acknowledgement:
28: This product includes software developed by Michael Pounov <misho@elwix.org>
29: ELWIX - Embedded LightWeight unIX and its contributors.
30: 4. Neither the name of AITNET nor the names of its contributors
31: may be used to endorse or promote products derived from this software
32: without specific prior written permission.
33:
34: THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
35: ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
36: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
37: ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
38: FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
39: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
40: OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
41: HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
42: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
43: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44: SUCH DAMAGE.
45: */
46: #ifndef __ACRC_H
47: #define __ACRC_H
48:
49:
50: #define REVOPTS_REVERTBYTE 1
51: #define REVOPTS_REVERTCRC 2
52:
53:
54: struct tagCRCPoly {
55: u_char poly_bits;
56: u_int poly_num;
57: char poly_name[19];
58: }; /* size 24bytes */
59: typedef struct tagCRCPoly crcPoly_t;
60:
61:
62: /*
63: * crcReflect() - Reflect all bits of number
64: *
65: * @crcNum = Number for reflection
66: * @crcBits = Number width bits
67: * return: -1 error, !=-1 reflecting number
68: */
69: inline unsigned int crcReflect(unsigned int crcNum, unsigned char crcBits);
70: /*
71: * crcCalc() - Generic CRC calculation function for many sub variants of CRC algorithms
72: *
73: * @psBuf = Data for calculation
74: * @bufLen = Length of data
75: * @crcBits = CRC algorithm bits (1, 4, 5, 6, 7, 8, 10, 11, 12, 15, 16, 24, 30, 32)
76: * @RevOpts = Options for computation (REVOPTS_REVERTBYTE, REVOPTS_REVERTCRC)
77: * @initCRC = Initial CRC value
78: * @xorCRC = Last xor CRC value
79: * return: -1 error, !=-1 CRC checksum
80: */
81: inline unsigned int crcCalc(unsigned char * __restrict psBuf, unsigned int bufLen,
82: unsigned char crcBits, unsigned char RevOpts,
83: unsigned int initCRC, unsigned int xorCRC);
84:
85: /*
86: * crcIP() - Checksum in IP communication
87: *
88: * @buf = Data for calculation
89: * @bufLen = Length of data
90: * return: -1 error, !=-1 Checksum
91: */
92: inline unsigned short crcIP(unsigned char * __restrict buf, int bufLen);
93: /*
94: * crcFletcher16() - Fletcher-16 Checksum computing
95: *
96: * @nBuf = Data for calculation
97: * @bufLen = Length of data
98: * return: -1 error, !=-1 Checksum
99: */
100: inline unsigned short crcFletcher16(unsigned short * __restrict nBuf, int bufLen);
101: /*
102: * crcFletcher() - Fletcher-32 Checksum computing
103: *
104: * @nBuf = Data for calculation
105: * @bufLen = Length of data
106: * return: -1 error, !=-1 Checksum
107: */
108: inline unsigned int crcFletcher(unsigned short * __restrict nBuf, int bufLen);
109: /*
110: * crcAdler() - crcAdler-32 Checksum computing
111: *
112: * @psBuf = Data for calculation
113: * @bufLen = Length of data
114: * return: -1 error, !=-1 Checksum
115: */
116: inline unsigned int crcAdler(unsigned char * __restrict psBuf, int bufLen);
117:
118: /*
119: * crcEther() - Checksum in Ethernet communication
120: *
121: * @psBuf = Data for calculation
122: * @bufLen = Length of data
123: * return: -1 error, !=-1 Checksum
124: */
125: #define crcEther(psBuf, bufLen) crcCalc((psBuf), (bufLen), 32, 3, 0xFFFFFFFF, 0xFFFFFFFF)
126:
127:
128: /*
129: * crcPelco() - Calculate Pelco D/P CRC
130: *
131: * @ver = Pelco protocol version (Dd | Pp)
132: * @pkt = Packet for calculate crc
133: * return: crc for packet, if is 0 check and crc_GetErrno() == 1
134: Pelco protocol not supported
135: */
136: inline unsigned char crcPelco(unsigned char ver, unsigned char *pkt);
137:
138:
139: /*
140: * hash_varchar() - Compute index hash by variable length string
141: *
142: * @csStr = Input data buffer
143: * @nStrLen = Length of data buffer
144: * @nVer = Version of algorythm; 0 - original, 1 - AITNET variant
145: * return: Hash value
146: */
147: inline unsigned int hash_varchar(const char *csStr, int nStrLen, int nVer);
148: /*
149: * hash_bernstein() - Compute index hash by Bernstein
150: *
151: * @csStr = Input data buffer
152: * @nStrLen = Length of data buffer
153: * @nVer = Version of algorythm; 0 - Bernstein, 1 - DJBX33A variant
154: * return: Hash value
155: */
156: inline unsigned int hash_bernstein(const char *csStr, int nStrLen, int nVer);
157: /*
158: * hash_jenkins() - Compute index hash by Jenkins (one-at-a-time)
159: *
160: * @csStr = Input data buffer
161: * @nStrLen = Length of data buffer
162: * return: Hash value
163: */
164: inline unsigned int hash_jenkins(const char *csStr, int nStrLen);
165: /*
166: * hash_jenkins32() - Fast Jenkins hash function
167: *
168: * @buf = Input buffer
169: * @len = Length of buffer
170: * @prevhash = Previous hash, if participate in continuing hash
171: * return: Hash value
172: */
173: unsigned int hash_jenkins32(const unsigned int *buf, int len, unsigned int prevhash);
174: /*
175: * hash_reddragon() - Compute index hash by Red Dragon
176: *
177: * @csStr = Input data buffer
178: * @nStrLen = Length of data buffer
179: * return: Hash value
180: */
181: inline unsigned int hash_reddragon(const char *csStr, int nStrLen);
182: /*
183: * hash_fnv1() - Compute index hash by FNV-1
184: *
185: * @csStr = Input data buffer
186: * @nStrLen = Length of data buffer
187: * @nVer = Version of algorythm; 0 - FNV-1, 1 - FNV-1a (best avalanche)
188: * return: Hash value
189: */
190: inline unsigned int hash_fnv1(const char *csStr, int nStrLen, int nVer);
191:
192: /*
193: * hash_fnv() - Compute index hash by FNV-1a
194: *
195: * @csStr = Input data buffer
196: * @nStrLen = Length of data buffer
197: * return: Hash value
198: */
199: #define hash_fnv(str, len) hash_fnv1((str), (len), 1)
200:
201:
202: #endif
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