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https://github.com/VectorCamp/vectorscan.git
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120 lines
3.4 KiB
C
120 lines
3.4 KiB
C
/*
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* Copyright (c) 2015, 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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/** \file
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* \brief Runtime code for hs_database manipulation.
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*/
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#ifndef DATABASE_H_D467FD6F343DDE
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#define DATABASE_H_D467FD6F343DDE
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#include "hs_compile.h" // for HS_MODE_ flags
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#include "hs_version.h"
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#include "ue2common.h"
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#define HS_DB_VERSION HS_VERSION_32BIT
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#define HS_DB_MAGIC (0xdbdbdbdbU)
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// Values in here cannot (easily) change - add new ones!
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// CPU type is the low 6 bits (we can't need more than 64, surely!)
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#define HS_PLATFORM_INTEL 1
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#define HS_PLATFORM_CPU_MASK 0x3F
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#define HS_PLATFORM_NOAVX2 (4<<13)
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/** \brief Platform features bitmask. */
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typedef u64a platform_t;
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static UNUSED
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const platform_t hs_current_platform = {
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#if !defined(__AVX2__)
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HS_PLATFORM_NOAVX2 |
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#endif
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0,
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};
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static UNUSED
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const platform_t hs_current_platform_no_avx2 = {
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HS_PLATFORM_NOAVX2 |
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0,
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};
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/*
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* a header to enclose the actual bytecode - useful for keeping info about the
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* compiled data.
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*/
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struct hs_database {
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u32 magic;
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u32 version;
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u32 length;
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u64a platform;
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u32 crc32;
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u32 reserved0;
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u32 reserved1;
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u32 bytecode; // offset relative to db start
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u32 padding[16];
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char bytes[];
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};
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static really_inline
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const void *hs_get_bytecode(const struct hs_database *db) {
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return ((const char *)db + db->bytecode);
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}
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/**
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* Cheap database sanity checks used in block mode scan calls and streaming
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* mode open calls.
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*/
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static really_inline
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hs_error_t validDatabase(const hs_database_t *db) {
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if (!db || db->magic != HS_DB_MAGIC) {
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return HS_INVALID;
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}
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if (db->version != HS_DB_VERSION) {
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return HS_DB_VERSION_ERROR;
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}
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return HS_SUCCESS;
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}
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hs_error_t dbIsValid(const struct hs_database *db);
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struct hs_database *dbCreate(const char *bytecode, size_t len, u64a platform);
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif /* DATABASE_H_D467FD6F343DDE */
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