1/* Copyright (c) 2007  Dmitry Xmelkov
2   All rights reserved.
3
4   Redistribution and use in source and binary forms, with or without
5   modification, are permitted provided that the following conditions are met:
6
7   * Redistributions of source code must retain the above copyright
8     notice, this list of conditions and the following disclaimer.
9   * Redistributions in binary form must reproduce the above copyright
10     notice, this list of conditions and the following disclaimer in
11     the documentation and/or other materials provided with the
12     distribution.
13   * Neither the name of the copyright holders nor the names of
14     contributors may be used to endorse or promote products derived
15     from this software without specific prior written permission.
16
17  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
18  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
21  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27  POSSIBILITY OF SUCH DAMAGE. */
28
29/* $Id: strpbrk_P.S 2503 2016-02-07 22:59:47Z joerg_wunsch $ */
30
31#if !defined(__AVR_TINY__)
32
33#ifndef	__DOXYGEN__
34
35#include "macros.inc"
36
37#define str_lo	r24
38#define acc_lo	r22
39
40#define ret_lo	r24
41#define ret_hi	r25
42
43/* This realization is compact, but is not very fast: an accept string
44   is not cashed.	*/
45
46	ASSEMBLY_CLIB_SECTION
47	.global _U(strpbrk_P)
48	.type   _U(strpbrk_P), @function
49
50_U(strpbrk_P):
51	X_movw	XL, str_lo
52	clr	ret_hi		; a trick to save 1 word
53  ; get next symbol from s[]
541:	ld	ret_lo, X+	; *s++
55	tst	ret_lo
56	breq	3f
57  ; check an occurance
58	X_movw	ZL, acc_lo
592:	X_lpm	r0, Z+
60	cp	r0, ret_lo
61	cpse	r0, __zero_reg__
62	brne	2b
63	brne	1b		; branch if end of accept[] is reached
64  ; OK, is found
65	sbiw	XL, 1
66	X_movw	ret_lo, XL
673:	ret
68
69	.size _U(strpbrk_P), . - _U(strpbrk_P)
70#endif	/* !__DOXYGEN__ */
71
72#endif /* !defined(__AVR_TINY__) */
73