1/* 2 AVR LIBC 3 strlcpy_P() 4 5 Copyright (c) 2003, 2005, 2006, 2007 Eric B. Weddington 6 Copyright (c) 2009 Dmitry Xmelkov 7 All rights reserved. 8 9 Redistribution and use in source and binary forms, with or without 10 modification, are permitted provided that the following conditions are met: 11 12 * Redistributions of source code must retain the above copyright 13 notice, this list of conditions and the following disclaimer. 14 * Redistributions in binary form must reproduce the above copyright 15 notice, this list of conditions and the following disclaimer in 16 the documentation and/or other materials provided with the 17 distribution. 18 * Neither the name of the copyright holders nor the names of 19 contributors may be used to endorse or promote products derived 20 from this software without specific prior written permission. 21 22 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 23 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 26 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 27 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 28 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 29 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 30 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 31 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 32 POSSIBILITY OF SUCH DAMAGE. 33 34*/ 35 36/* $Id: strlcpy_P.S 2503 2016-02-07 22:59:47Z joerg_wunsch $ */ 37 38#if !defined(__AVR_TINY__) 39 40#if !defined(__DOXYGEN__) 41 42#include "asmdef.h" 43 44#define dst_lo r24 45#define src_hi r23 46#define src_lo r22 47#define siz_hi r21 48#define siz_lo r20 49#define rslt_lo r24 50 51 52ENTRY strlcpy_P 53 X_movw XL, dst_lo ; X = dst 54 X_movw ZL, src_lo ; Z = src 55 56 ; copy loop 571: subi siz_lo, lo8(1) 58 sbci siz_hi, hi8(1) 59 brcs 4f ; is possible with siz == 0 60 breq 3f ; --> siz chars copied 61 X_lpm __tmp_reg__, Z+ 62 st X+, __tmp_reg__ 63 tst __tmp_reg__ 64 brne 1b 65 66 ; calculate result (Z - 1 - src) and return 672: sub ZL, src_lo 68 sbc ZH, src_hi 69 sbiw ZL, 1 70 X_movw rslt_lo, ZL 71 ret 72 73 ; terminate dst 743: st X, __zero_reg__ 75 76 ; find src end 774: X_lpm __tmp_reg__, Z+ 78 tst __tmp_reg__ 79 brne 4b 80 rjmp 2b 81 82ENDFUNC 83 84#endif /* not __DOXYGEN__ */ 85 86#endif /* !defined(__AVR_TINY__) */ 87