1 files changed, 149 insertions, 0 deletions
diff --git a/usr.bin/lex/ccl.c b/usr.bin/lex/ccl.c
new file mode 100644
index 00000000000..1622abe6d46
--- /dev/null
+++ b/usr.bin/lex/ccl.c
@@ -0,0 +1,149 @@
+/* ccl - routines for character classes */
+
+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Vern Paxson.
+ * 
+ * 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.
+ *
+ * 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.
+ */
+
+/* $Header: /cvs/OpenBSD/src/usr.bin/lex/ccl.c,v 1.1 1995/10/18 08:45:29 deraadt Exp $ */
+
+#include "flexdef.h"
+
+/* ccladd - add a single character to a ccl */
+
+void ccladd( cclp, ch )
+int cclp;
+int ch;
+	{
+	int ind, len, newpos, i;
+
+	check_char( ch );
+
+	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 - return an empty ccl */
+
+int cclinit()
+	{
+	if ( ++lastccl >= current_maxccls )
+		{
+		current_maxccls += MAX_CCLS_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 the given ccl */
+
+void cclnegate( cclp )
+int cclp;
+	{
+	cclng[cclp] = 1;
+	}
+
+
+/* list_character_set - list the members of a set of characters in CCL form
+ *
+ * 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.
+ */
+
+void list_character_set( file, cset )
+FILE *file;
+int cset[];
+	{
+	register int i;
+
+	putc( '[', file );
+
+	for ( i = 0; i < csize; ++i )
+		{
+		if ( cset[i] )
+			{
+			register int start_char = i;
+
+			putc( ' ', file );
+
+			fputs( readable_form( i ), file );
+
+			while ( ++i < csize && cset[i] )
+				;
+
+			if ( i - 1 > start_char )
+				/* this was a run */
+				fprintf( file, "-%s", readable_form( i - 1 ) );
+
+			putc( ' ', file );
+			}
+		}
+
+	putc( ']', file );
+	}