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- /* ccl - routines for character classes */
-
- /*
- * Copyright (c) 1987, the University of California
- *
- * 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.
- *
- * This program may be redistributed. Enhancements and derivative works
- * may be created provided the new works, if made available to the general
- * public, are made available for use by anyone.
- */
-
- #include "flexdef.h"
-
- /* ccladd - add a single character to a ccl
- *
- * synopsis
- * int cclp;
- * char ch;
- * ccladd( cclp, ch );
- */
-
- ccladd( cclp, ch )
- int cclp;
- char ch;
-
- {
- int ind, len, newpos, i;
-
- len = ccllen[cclp];
- ind = cclmap[cclp];
-
- /* check to see if the character is already in the ccl */
-
- for ( i = 0; i < len; ++i )
- if ( ccltbl[ind + i] == ch )
- return;
-
- newpos = ind + len;
-
- if ( newpos >= current_max_ccl_tbl_size )
- {
- current_max_ccl_tbl_size += MAX_CCL_TBL_SIZE_INCREMENT;
-
- ++num_reallocs;
-
- ccltbl = reallocate_character_array( ccltbl, current_max_ccl_tbl_size );
- }
-
- ccllen[cclp] = len + 1;
- ccltbl[newpos] = ch;
- }
-
-
- /* cclinit - make an empty ccl
- *
- * synopsis
- * int cclinit();
- * new_ccl = cclinit();
- */
-
- int cclinit()
-
- {
- if ( ++lastccl >= current_maxccls )
- {
- current_maxccls += MAXCCLS_INCREMENT;
-
- ++num_reallocs;
-
- cclmap = reallocate_integer_array( cclmap, current_maxccls );
- ccllen = reallocate_integer_array( ccllen, current_maxccls );
- cclng = reallocate_integer_array( cclng, current_maxccls );
- }
-
- if ( lastccl == 1 )
- /* we're making the first ccl */
- cclmap[lastccl] = 0;
-
- 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];
-
- ccllen[lastccl] = 0;
- cclng[lastccl] = 0; /* ccl's start out life un-negated */
-
- return ( lastccl );
- }
-
-
- /* cclnegate - negate a ccl
- *
- * synopsis
- * int cclp;
- * cclnegate( ccl );
- */
-
- cclnegate( cclp )
- int cclp;
-
- {
- cclng[cclp] = 1;
- }
-