lookup_util.h
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- /*
- * ===========================================================================
- * PRODUCTION $Log: lookup_util.h,v $
- * PRODUCTION Revision 1000.1 2004/06/01 18:04:11 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [GCC34_MSVC7] Dev-tree R1.8
- * PRODUCTION
- * ===========================================================================
- */
- /* $Id: lookup_util.h,v 1000.1 2004/06/01 18:04:11 gouriano Exp $
- * ===========================================================================
- *
- * PUBLIC DOMAIN NOTICE
- * National Center for Biotechnology Information
- *
- * This software/database is a "United States Government Work" under the
- * terms of the United States Copyright Act. It was written as part of
- * the author's offical duties as a United States Government employee and
- * thus cannot be copyrighted. This software/database is freely available
- * to the public for use. The National Library of Medicine and the U.S.
- * Government have not placed any restriction on its use or reproduction.
- *
- * Although all reasonable efforts have been taken to ensure the accuracy
- * and reliability of the software and data, the NLM and the U.S.
- * Government do not and cannot warrant the performance or results that
- * may be obtained by using this software or data. The NLM and the U.S.
- * Government disclaim all warranties, express or implied, including
- * warranties of performance, merchantability or fitness for any particular
- * purpose.
- *
- * Please cite the author in any work or product based on this material.
- *
- * ===========================================================================
- */
- /** @file lookup_util.h
- * @todo FIXME: need description
- */
- #include <algo/blast/core/blast_def.h>
- #ifndef UTIL__H
- #define UTIL__H
- #ifdef __cplusplus
- extern "C" {
- #endif
- /** Integer exponentiation using right to left binary algorithm.
- * See knuth TAOCP vol. 2, section 4.6.3.
- *
- * @param x x
- * @param n n
- * @return x to the n-th power
- */
- Int4 iexp(Int4 x, Int4 n);
- /**
- * Integer base two logarithm.
- *
- * @param x x
- * @return lg(x)
- */
- Int4 ilog2(Int4 x);
- /** Make a bit mask with the low-order x bits set
- *
- * @param x x
- * @return the mask
- */
- Int4 makemask(Int4 x);
- /**
- * generates a de Bruijn sequence containing all substrings
- * of length n over an alphabet of size k.
- * if alphabet is not NULL, use it as a translation table
- * for the output.
- * expects that "output" has already been allocated and is at
- * least k^n in size.
- *
- * @param n the number of letters in each word
- * @param k the size of the alphabet
- * @param output the output sequence
- * @param alphabet optional translation alphabet
- */
- void debruijn(Int4 n, Int4 k, Uint1* output, Uint1* alphabet);
- #ifdef __cplusplus
- }
- #endif
- #endif /* UTIL__H */