1 /* ccl - routines for character classes */
4 * Copyright (c) 1990 The Regents of the University of California.
7 * This code is derived from software contributed to Berkeley by
10 * The United States Government has rights in this work pursuant
11 * to contract no. DE-AC03-76SF00098 between the United States
12 * Department of Energy and the University of California.
14 * Redistribution and use in source and binary forms are permitted provided
15 * that: (1) source distributions retain this entire copyright notice and
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17 * acknowledgement: ``This product includes software developed by the
18 * University of California, Berkeley and its contributors'' in the
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21 * Neither the name of the University nor the names of its contributors may
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23 * specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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29 /* $Header: /home/daffy/u0/vern/flex/RCS/ccl.c,v 2.9 93/09/16 20:32:14 vern Exp $ */
30 /* $FreeBSD: src/usr.bin/lex/ccl.c,v 1.5 1999/10/27 07:56:43 obrien Exp $ */
31 /* $DragonFly: src/usr.bin/lex/ccl.c,v 1.4 2005/08/04 17:31:22 drhodus Exp $ */
35 /* ccladd - add a single character to a ccl */
37 void ccladd(int cclp, int ch)
39 int ind, len, newpos, i;
46 /* check to see if the character is already in the ccl */
48 for ( i = 0; i < len; ++i )
49 if ( ccltbl[ind + i] == ch )
54 if ( newpos >= current_max_ccl_tbl_size )
56 current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT;
60 ccltbl = reallocate_Character_array( ccltbl,
61 current_max_ccl_tbl_size );
64 ccllen[cclp] = len + 1;
69 /* cclinit - return an empty ccl */
73 if ( ++lastccl >= current_maxccls )
75 current_maxccls += MAX_CCLS_INCREMENT;
79 cclmap = reallocate_integer_array( cclmap, current_maxccls );
80 ccllen = reallocate_integer_array( ccllen, current_maxccls );
81 cclng = reallocate_integer_array( cclng, current_maxccls );
85 /* we're making the first ccl */
89 /* The new pointer is just past the end of the last ccl.
90 * Since the cclmap points to the \first/ character of a
91 * ccl, adding the length of the ccl to the cclmap pointer
92 * will produce a cursor to the first free space.
94 cclmap[lastccl] = cclmap[lastccl - 1] + ccllen[lastccl - 1];
97 cclng[lastccl] = 0; /* ccl's start out life un-negated */
103 /* cclnegate - negate the given ccl */
105 void cclnegate(int cclp)
111 /* list_character_set - list the members of a set of characters in CCL form
113 * Writes to the given file a character-class representation of those
114 * characters present in the given CCL. A character is present if it
115 * has a non-zero value in the cset array.
118 void list_character_set(FILE *file, int *cset)
124 for ( i = 0; i < csize; ++i )
132 fputs( readable_form( i ), file );
134 while ( ++i < csize && cset[i] )
137 if ( i - 1 > start_char )
139 fprintf( file, "-%s", readable_form( i - 1 ) );