1/* Copyright (c) 2002, 2005, 2006, 2007 Reiner Patommel 2 Copyright (c) 2007 Dmitry Xmelkov 3 All rights reserved. 4 5 Redistribution and use in source and binary forms, with or without 6 modification, are permitted provided that the following conditions are met: 7 8 * Redistributions of source code must retain the above copyright 9 notice, this list of conditions and the following disclaimer. 10 * Redistributions in binary form must reproduce the above copyright 11 notice, this list of conditions and the following disclaimer in 12 the documentation and/or other materials provided with the 13 distribution. 14 * Neither the name of the copyright holders nor the names of 15 contributors may be used to endorse or promote products derived 16 from this software without specific prior written permission. 17 18 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 19 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 22 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 POSSIBILITY OF SUCH DAMAGE. */ 29 30/* $Id: strncasecmp_P.S 2503 2016-02-07 22:59:47Z joerg_wunsch $ */ 31 32/* 33 strncasecmp_P.S 34 Case insensitive compare 35 36 Contributors: 37 Created by Reiner Patommel 38*/ 39 40#if !defined(__AVR_TINY__) 41 42#if !defined(__DOXYGEN__) 43 44#include "macros.inc" 45 46#define s1_hi r25 47#define s1_lo r24 48#define s2_hi r23 49#define s2_lo r22 50#define len_hi r21 51#define len_lo r20 52 53#define tmp r22 54#define ret_hi r25 55#define ret_lo r24 56 57 ASSEMBLY_CLIB_SECTION 58 .global _U(strncasecmp_P) 59 .type _U(strncasecmp_P), @function 60_U(strncasecmp_P): 61 X_movw ZL, s2_lo 62 X_movw XL, s1_lo 63 641: subi len_lo, lo8(1) ; if (--len == -1) return 0 65 sbci len_hi, hi8(1) 66 brlo 5f 67 68 ld ret_lo, X+ ; *s1++ 69 cpi ret_lo, 'A' ; if in [A-Z] then tolower() 70 brlt 2f 71 cpi ret_lo, 'Z'+1 72 brge 2f 73 subi ret_lo, 'A'-'a' 74 752: X_lpm tmp, Z+ ; *s2++ 76 cpi tmp, 'A' ; if in [A-Z] then tolower() 77 brlt 3f 78 cpi tmp, 'Z'+1 79 brge 3f 80 subi tmp, 'A'-'a' 81 823: sub ret_lo, tmp ; compare 83 cpse tmp, __zero_reg__ ; break, if end of string 84 breq 1b 854: sbc ret_hi, ret_hi ; sign extension 86 ret 87 885: sub ret_lo, ret_lo ; length limit, return 0 89 rjmp 4b 90 91 .size _U(strncasecmp_P), . - _U(strncasecmp_P) 92 93#endif /* not __DOXYGEN__ */ 94 95#endif /* !defined(__AVR_TINY__) */ 96