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72 lines
3.0 KiB
C
72 lines
3.0 KiB
C
/*
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* Copyright (c) 2015-2016, Intel Corporation
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*
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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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*
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* * Redistributions of source code must retain the above copyright notice,
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* 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 the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of Intel Corporation nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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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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*/
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#ifndef FDR_LOADVAL_H
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#define FDR_LOADVAL_H
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#include "ue2common.h"
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#include "util/unaligned.h"
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#define MAKE_LOADVAL(type, name) \
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static really_inline \
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type name(const u8 *ptr, UNUSED const u8 *lo, UNUSED const u8 *hi)
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#define NORMAL_SAFE(type) \
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do { \
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assert(ptr >= lo); \
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assert(ptr + sizeof(type) - 1 < hi); \
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} while(0)
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#define MAKE_LOOP_CE(TYPE) \
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TYPE v = 0; \
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for (TYPE i = 0; i < sizeof(TYPE); i++) { \
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if ((lo <= ptr + i) && (ptr + i < hi)) { \
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v += (TYPE)ptr[i] << (i*8); \
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} \
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} \
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return v;
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// no suffix = normal (unaligned)
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// _ce = cautious everywhere (in both directions); test against hi and lo
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MAKE_LOADVAL(u16, lv_u16) {
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NORMAL_SAFE(u16);
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return unaligned_load_u16(ptr);
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}
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MAKE_LOADVAL(u64a, lv_u64a) {
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NORMAL_SAFE(u32);
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return unaligned_load_u64a(ptr);
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}
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MAKE_LOADVAL(u16, lv_u16_ce) { MAKE_LOOP_CE(u16); }
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MAKE_LOADVAL(u64a, lv_u64a_ce) { MAKE_LOOP_CE(u64a); }
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#endif
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