85 lines
2.9 KiB
C
85 lines
2.9 KiB
C
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/*
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* Copyright (c) 1989 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* James A. Woods.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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char copyright[] =
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"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
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All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)locate.bigram.c 4.7 (Berkeley) 6/1/90";
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#endif /* not lint */
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/*
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* bigram < text > bigrams
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*
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* List bigrams for 'updatedb' script.
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* Use 'code' to encode a file using this output.
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*/
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#include <stdio.h>
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#include <sys/param.h> /* for MAXPATHLEN */
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char buf1[MAXPATHLEN] = " ";
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char buf2[MAXPATHLEN];
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main ( )
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{
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register char *cp;
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register char *oldpath = buf1, *path = buf2;
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while ( fgets ( path, sizeof(buf2), stdin ) != NULL ) {
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/* skip longest common prefix */
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for ( cp = path; *cp == *oldpath; cp++, oldpath++ )
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if ( *oldpath == NULL )
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break;
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/*
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* output post-residue bigrams only
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*/
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while ( *cp != NULL && *(cp + 1) != NULL ) {
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putchar ( *cp++ );
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putchar ( *cp++ );
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putchar ( '\n' );
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}
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if ( path == buf1 ) /* swap pointers */
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path = buf2, oldpath = buf1;
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else
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path = buf1, oldpath = buf2;
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}
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}
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