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add lfsr.h

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Michael Graff 1999-12-15 01:49:07 +00:00
parent 4534478a8b
commit cb5f37d93b
2 changed files with 50 additions and 1 deletions
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2
lib/isc/include/isc/Makefile.in
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@ -21,7 +21,7 @@ top_srcdir = @top_srcdir@
HEADERS = assertions.h base64.h boolean.h buffer.h bufferlist.h \
commandline.h error.h event.h eventclass.h \
heap.h int.h interfaceiter.h lang.h lex.h lib.h \
heap.h int.h interfaceiter.h lang.h lex.h lfsr.h lib.h \
list.h magic.h mem.h msgcat.h mutexblock.h netaddr.h \
print.h random.h rbtgen.h region.h result.h \
resultclass.h rwlock.h serial.h sockaddr.h socket.h str.h \

49
lib/isc/include/isc/lfsr.h Normal file
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@ -0,0 +1,49 @@
/*
* Copyright (C) 1999 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
* SOFTWARE.
*/
#ifndef ISC_LFSR_H
#define ISC_LFSR_H 1
#include <isc/types.h>
/*
* The members of this structure can be used by the application, but care
* needs to be taken to not change state once the lfsr is in operation.
*/
typedef struct {
isc_uint32_t state; /* previous state */
isc_uint32_t bits; /* length */
isc_uint32_t tap; /* bit taps */
} isc_lfsr_t;
/*
* This structure contains some standard LFSR values that can be used.
* One can use the isc_lfsr_findlfsr() to search for one with at least
* a certain number of bits.
*/
extern isc_lfsr_t isc_lfsr_standard[];
ISC_LANG_BEGINDECLS
isc_uint32_t isc_lfsr_generate(isc_lfsr_t *lfsr);
isc_uint32_t isc_lfsr_skipgenerate(isc_lfsr_t *lfsr, unsigned int skip);
isc_uint32_t isc_lfsr_lfsrskipgenerate(isc_lfsr_t *lfsr1, isc_lfsr_t *lfsr2,
unsigned int skipbits);
ISC_LANG_ENDDECLS
#endif /* ISC_LFSR_H */