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+/*-
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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 BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+	.asciz "@(#)strcspn.s	5.1 (Berkeley) 5/15/90"
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * Span the complement of string s2 (skip characters that are not in s2).
+ * Return the number of characters in s1 that were skipped.
+ *
+ * size_t
+ * strcspn(s1, s2)
+ *	const char *s1, *s2;
+ */
+#include "DEFS.h"
+
+ENTRY(strcspn, 0)
+	subl2	$32,sp		/* make 256 bit table */
+	movc5	$0,(sp),$0,$32,(sp)
+	movq	4(ap),r1	/* r1 = s1, r2 = s2 */
+
+	/* turn on bit for each character in s2, including '\0' */
+1:
+	movzbl	(r2)+,r0
+	bbss	r0,(sp),1b
+	bneq	1b
+	movl	r1,r0		/* r0 = s (current pos in s1) */
+
+	/* look for a character that is in s2 */
+2:
+	movzbl	(r0)+,r2	/* c = *s++ */
+	bbc	r2,(sp),2b	/* loop until c is in table */
+	decl	r0		/* s-- */
+	subl2	r1,r0		/* r0 = s - s1 = count */
+	ret