NetBSD/usr.bin/lex/ccl.c

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/* ccl - routines for character classes */
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/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
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* Vern Paxson.
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*
* The United States Government has rights in this work pursuant
* to contract no. DE-AC03-76SF00098 between the United States
* Department of Energy and the University of California.
*
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* Redistribution and use in source and binary forms are permitted provided
* that: (1) source distributions retain this entire copyright notice and
* comment, and (2) distributions including binaries display the following
* acknowledgement: ``This product includes software developed by the
* University of California, Berkeley and its contributors'' in the
* documentation or other materials provided with the distribution and in
* all advertising materials mentioning features or use of this software.
* Neither the name of the University nor the names of its contributors may
* be used to endorse or promote products derived from this software without
* specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* $Header: /cvsroot/src/usr.bin/lex/Attic/ccl.c,v 1.6 1995/05/05 05:35:12 jtc Exp $ */
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#include "flexdef.h"
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/* ccladd - add a single character to a ccl */
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void ccladd( cclp, ch )
int cclp;
int ch;
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{
int ind, len, newpos, i;
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check_char( ch );
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len = ccllen[cclp];
ind = cclmap[cclp];
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/* check to see if the character is already in the ccl */
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for ( i = 0; i < len; ++i )
if ( ccltbl[ind + i] == ch )
return;
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newpos = ind + len;
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if ( newpos >= current_max_ccl_tbl_size )
{
current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT;
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++num_reallocs;
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ccltbl = reallocate_Character_array( ccltbl,
current_max_ccl_tbl_size );
}
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ccllen[cclp] = len + 1;
ccltbl[newpos] = ch;
}
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/* cclinit - return an empty ccl */
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int cclinit()
{
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if ( ++lastccl >= current_maxccls )
{
current_maxccls += MAX_CCLS_INCREMENT;
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++num_reallocs;
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cclmap = reallocate_integer_array( cclmap, current_maxccls );
ccllen = reallocate_integer_array( ccllen, current_maxccls );
cclng = reallocate_integer_array( cclng, current_maxccls );
}
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if ( lastccl == 1 )
/* we're making the first ccl */
cclmap[lastccl] = 0;
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else
/* The new pointer is just past the end of the last ccl.
* Since the cclmap points to the \first/ character of a
* ccl, adding the length of the ccl to the cclmap pointer
* will produce a cursor to the first free space.
*/
cclmap[lastccl] = cclmap[lastccl - 1] + ccllen[lastccl - 1];
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ccllen[lastccl] = 0;
cclng[lastccl] = 0; /* ccl's start out life un-negated */
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return lastccl;
}
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/* cclnegate - negate the given ccl */
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void cclnegate( cclp )
int cclp;
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{
cclng[cclp] = 1;
}
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/* list_character_set - list the members of a set of characters in CCL form
*
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* Writes to the given file a character-class representation of those
* characters present in the given CCL. A character is present if it
* has a non-zero value in the cset array.
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*/
void list_character_set( file, cset )
FILE *file;
int cset[];
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{
register int i;
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putc( '[', file );
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for ( i = 0; i < csize; ++i )
{
if ( cset[i] )
{
register int start_char = i;
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putc( ' ', file );
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fputs( readable_form( i ), file );
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while ( ++i < csize && cset[i] )
;
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if ( i - 1 > start_char )
/* this was a run */
fprintf( file, "-%s", readable_form( i - 1 ) );
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putc( ' ', file );
}
}
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putc( ']', file );
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}