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/* Copyright (c) 2010 Jan Waclawek
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based on libc/pmstring/memcmp_P.S which is
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Copyright (c) 2002, 2007 Marek Michalkiewicz
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Copyright (c) 2007 Dmitry Xmelkov
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and on exteded program memory routines, which are
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Copyright (c) 2006, Carlos Lamas
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in
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the documentation and/or other materials provided with the
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* Neither the name of the copyright holders nor the names of
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE. */
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/* $Id: memcmp_PF.S 2191 2010-11-05 13:45:57Z arcanum $ */
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/** \ingroup avr_pgmspace
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\fn int memcmp_PF(const void *s1, uint_farptr_t s2, size_t len)
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\brief Compare memory areas
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The memcmp_PF() function compares the first \p len bytes of the memory
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areas \p s1 and flash \p s2. The comparision is performed using unsigned
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char operations. It is an equivalent of memcmp_P() function, except
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that it is capable working on all FLASH including the exteded area
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\returns The memcmp_PF() function returns an integer less than, equal
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to, or greater than zero if the first \p len bytes of \p s1 is found,
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respectively, to be less than, to match, or be greater than the first
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\p len bytes of \p s2. */
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#if !defined(__AVR_TINY__)
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#if !defined(__DOXYGEN__)
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/* the conditional caters for pre-1.6.8 libc and standalone use */
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#ifdef ASSEMBLY_CLIB_SECTION
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.type _U(memcmp_PF), @function
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LPM_R0_ZPLUS_INIT s2_b2
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LPM_R0_ZPLUS_NEXT s2_b2
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.size _U(memcmp_PF), . - _U(memcmp_PF)
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#endif /* not __DOXYGEN__ */
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#endif /* !defined(__AVR_TINY__) */
added
removed
libc/pmstring/memcmp_PF.S
