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98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/*
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* Copyright (c) 2015-2017, 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_CONFIRM_H
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#define FDR_CONFIRM_H
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#include "ue2common.h"
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#include "hwlm/hwlm.h"
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static really_inline
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u32 mul_hash_64(u64a lv, u64a andmsk, u64a mult, u32 nBits) {
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return ((lv & andmsk) * mult) >> (sizeof(u64a)*8 - nBits);
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}
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// data structures
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// TODO: fix this hard-coding
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#define CONF_TYPE u64a
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#define CONF_HASH_CALL mul_hash_64
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typedef enum LitInfoFlags {
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NoFlags = 0,
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Caseless = 1,
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NoRepeat = 2,
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} LitInfoFlags;
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/**
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* \brief Structure describing a literal, linked to by FDRConfirm.
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*
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* This structure is followed in memory by a variable-sized string prefix, for
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* strings that are longer than CONF_TYPE.
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*/
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struct LitInfo {
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CONF_TYPE v;
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CONF_TYPE msk;
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hwlm_group_t groups;
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u32 id; // literal ID as passed in
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u8 size;
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u8 flags; /* LitInfoFlags */
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u8 next;
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};
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#define FDRC_FLAG_NO_CONFIRM 1
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/**
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* \brief FDR confirm header.
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*
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* This structure is followed in memory by:
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*
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* -# lit index mapping (array of u32)
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* -# list of LitInfo structures
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*/
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struct FDRConfirm {
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CONF_TYPE andmsk;
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CONF_TYPE mult;
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u32 nBitsOrSoleID; // if flags is NO_CONFIRM then this is soleID
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u32 flags; // sole meaning is 'non-zero means no-confirm' (that is all)
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hwlm_group_t groups;
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u32 soleLitSize;
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u32 soleLitCmp;
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u32 soleLitMsk;
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};
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static really_inline
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const u32 *getConfirmLitIndex(const struct FDRConfirm *fdrc) {
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const u8 *base = (const u8 *)fdrc;
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const u32 *litIndex =
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(const u32 *)(base + ROUNDUP_N(sizeof(*fdrc), alignof(u32)));
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assert(ISALIGNED(litIndex));
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return litIndex;
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}
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#endif // FDR_CONFIRM_H
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