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
16 * comment, and (2) distributions including binaries display the following
17 * acknowledgement: ``This product includes software developed by the
18 * University of California, Berkeley and its contributors'' in the
19 * documentation or other materials provided with the distribution and in
20 * all advertising materials mentioning features or use of this software.
21 * Neither the name of the University nor the names of its contributors may
22 * be used to endorse or promote products derived from this software without
23 * specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
25 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
31 "@(#) $Id: ccl.c,v 1.2 1994/06/24 10:56:38 ceriel Exp $ (LBL)";
36 /* ccladd - add a single character to a ccl
44 void ccladd( cclp, ch )
49 int ind, len, newpos, i;
54 /* check to see if the character is already in the ccl */
56 for ( i = 0; i < len; ++i )
57 if ( ccltbl[ind + i] == ch )
62 if ( newpos >= current_max_ccl_tbl_size )
64 current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT;
68 ccltbl = reallocate_character_array( ccltbl, current_max_ccl_tbl_size );
71 ccllen[cclp] = len + 1;
76 /* cclinit - make an empty ccl
80 * new_ccl = cclinit();
86 if ( ++lastccl >= current_maxccls )
88 current_maxccls += MAX_CCLS_INCREMENT;
92 cclmap = reallocate_integer_array( cclmap, current_maxccls );
93 ccllen = reallocate_integer_array( ccllen, current_maxccls );
94 cclng = reallocate_integer_array( cclng, current_maxccls );
98 /* we're making the first ccl */
102 /* the new pointer is just past the end of the last ccl. Since
103 * the cclmap points to the \first/ character of a ccl, adding the
104 * length of the ccl to the cclmap pointer will produce a cursor
105 * to the first free space
107 cclmap[lastccl] = cclmap[lastccl - 1] + ccllen[lastccl - 1];
110 cclng[lastccl] = 0; /* ccl's start out life un-negated */
116 /* cclnegate - negate a ccl
123 void cclnegate( cclp )
131 /* list_character_set - list the members of a set of characters in CCL form
136 * list_character_set( cset );
138 * writes to the given file a character-class representation of those
139 * characters present in the given set. A character is present if it
140 * has a non-zero value in the set array.
143 void list_character_set( file, cset )
149 char *readable_form();
153 for ( i = 0; i < csize; ++i )
157 register int start_char = i;
161 fputs( readable_form( i ), file );
163 while ( ++i < csize && cset[i] )
166 if ( i - 1 > start_char )
168 fprintf( file, "-%s", readable_form( i - 1 ) );