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/*
* Copyright (c) 2018, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Intel Corporation nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/** \file
* \brief Chimera: database construction, etc.
*/
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "allocator.h"
#include "database.h"
#include "hs.h"
#include "ch.h"
#include "hs_internal.h"
#include "ch_common.h"
#include "ch_alloc.h"
#include "ch_database.h"
#include "ch_internal.h"
static really_inline
int db_correctly_aligned(const void *db) {
return ISALIGNED_N(db, alignof(unsigned long long));
}
HS_PUBLIC_API
ch_error_t HS_CDECL ch_free_database(ch_database_t *hydb) {
if (hydb && hydb->magic != CH_DB_MAGIC) {
return CH_INVALID;
}
ch_database_free(hydb);
return CH_SUCCESS;
}
HS_PUBLIC_API
ch_error_t HS_CDECL ch_database_size(const ch_database_t *hydb, size_t *size) {
if (!size) {
return CH_INVALID;
}
ch_error_t ret = hydbIsValid(hydb);
if (unlikely(ret != CH_SUCCESS)) {
return ret;
}
*size = sizeof(struct ch_database) + hydb->length;
return CH_SUCCESS;
}
/** \brief Identifier prepended to database info. */
static const char CHIMERA_IDENT[] = "Chimera ";
HS_PUBLIC_API
ch_error_t HS_CDECL ch_database_info(const ch_database_t *hydb, char **info) {
if (!info) {
return CH_INVALID;
}
*info = NULL;
if (!hydb || !db_correctly_aligned(hydb) || hydb->magic != CH_DB_MAGIC) {
return HS_INVALID;
}
const struct ch_bytecode *bytecode = ch_get_bytecode(hydb);
char noMulti = (bytecode->flags & CHIMERA_FLAG_NO_MULTIMATCH);
if (noMulti) {
size_t len = strlen(CHIMERA_IDENT);
*info = ch_misc_alloc(len + 1);
if (!(*info)) {
return CH_INVALID;
}
memcpy((*info), CHIMERA_IDENT, len);
(*info)[len] = '\0';
return CH_SUCCESS;
}
char *hsinfo = NULL;
hs_error_t ret = hs_database_info(getHyperscanDatabase(bytecode), &hsinfo);
if (ret != HS_SUCCESS) {
assert(!hsinfo);
return ret;
}
size_t hybridlen = strlen(CHIMERA_IDENT);
size_t hslen = strlen(hsinfo);
*info = ch_misc_alloc(hybridlen + hslen + 1);
if (!(*info)) {
ch_misc_free(hsinfo);
return CH_INVALID;
}
memcpy((*info), CHIMERA_IDENT, hybridlen);
memcpy((*info) + hybridlen, hsinfo, hslen);
(*info)[hybridlen + hslen] = '\0';
ch_misc_free(hsinfo);
return CH_SUCCESS;
}
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