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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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 $ */
34 /* ccladd - add a single character to a ccl */
36 void ccladd( cclp, ch )
40 int ind, len, newpos, i;
47 /* check to see if the character is already in the ccl */
49 for ( i = 0; i < len; ++i )
50 if ( ccltbl[ind + i] == ch )
55 if ( newpos >= current_max_ccl_tbl_size )
57 current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT;
61 ccltbl = reallocate_Character_array( ccltbl,
62 current_max_ccl_tbl_size );
65 ccllen[cclp] = len + 1;
70 /* cclinit - return an empty ccl */
74 if ( ++lastccl >= current_maxccls )
76 current_maxccls += MAX_CCLS_INCREMENT;
80 cclmap = reallocate_integer_array( cclmap, current_maxccls );
81 ccllen = reallocate_integer_array( ccllen, current_maxccls );
82 cclng = reallocate_integer_array( cclng, current_maxccls );
86 /* we're making the first ccl */
90 /* The new pointer is just past the end of the last ccl.
91 * Since the cclmap points to the \first/ character of a
92 * ccl, adding the length of the ccl to the cclmap pointer
93 * will produce a cursor to the first free space.
95 cclmap[lastccl] = cclmap[lastccl - 1] + ccllen[lastccl - 1];
98 cclng[lastccl] = 0; /* ccl's start out life un-negated */
104 /* cclnegate - negate the given ccl */
106 void cclnegate( cclp )
113 /* list_character_set - list the members of a set of characters in CCL form
115 * Writes to the given file a character-class representation of those
116 * characters present in the given CCL. A character is present if it
117 * has a non-zero value in the cset array.
120 void list_character_set( file, cset )
128 for ( i = 0; i < csize; ++i )
132 register int start_char = i;
136 fputs( readable_form( i ), file );
138 while ( ++i < csize && cset[i] )
141 if ( i - 1 > start_char )
143 fprintf( file, "-%s", readable_form( i - 1 ) );