ref: 1adf41744cbbdfdb7c834c92bd37280650fb7b5a
dir: figlet/crc.h
/*
* crc.h - CRC calculation routine
*
* Version 1.0
*/
/*
* Copyright (c) 1995, Edward B. Hamrick
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that
*
* (i) the above copyright notice and the text in this "C" comment block
* appear in all copies of the software and related documentation, and
*
* (ii) any modifications to this source file must be sent, via e-mail
* to the copyright owner (currently hamrick@primenet.com) within
* 30 days of such modification.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL EDWARD B. HAMRICK BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
* INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
* THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This CRC algorithm is the same as that used in zip. Normally it
* should be initialized with 0xffffffff, and the final CRC stored
* should be crc ^ 0xffffffff.
*
* It implements the polynomial:
*
* x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1
*/
#ifndef __CRC_H
#define __CRC_H
#ifdef __cplusplus
extern "C" {
#endif
unsigned long CrcUpdate( /* returns updated crc */
unsigned long crc, /* starting crc */
unsigned char *buffer, /* buffer to use to update crc */
long length /* length of buffer */
);
#ifdef __cplusplus
}
#endif
#endif