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scanroutines.c
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scanroutines.c
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/*
Scanning routines for different data types.
Copyright (C) 2009,2010 WANG Lu <coolwanglu(a)gmail.com>
Copyright (C) 2017 Andrea Stacchiotti <andreastacchiotti(a)gmail.com>
This file is part of libscanmem.
This library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <stdbool.h>
#include "common.h"
#include "endianness.h"
#include "scanroutines.h"
#include "value.h"
/* for convenience */
#define SCAN_ROUTINE_ARGUMENTS (const mem64_t* memory_ptr, size_t memlength, const value_t* old_value, const uservalue_t* user_value, match_flags* saveflags)
unsigned int(*sm_scan_routine) SCAN_ROUTINE_ARGUMENTS;
#define MEMORY_COMP(value, field, op) (((value)->flags & flag_##field) && (get_##field(memory_ptr) op get_##field(value)))
#define GET_FLAG(valptr, field) ((valptr)->flags & flag_##field)
#define SET_FLAG(flagsptr, field) ((*(flagsptr)) |= flag_##field)
/********************/
/* Integer specific */
/********************/
/* for MATCHANY */
#define DEFINE_INTEGER_MATCHANY_ROUTINE(DATAWIDTH) \
extern inline unsigned int scan_routine_INTEGER##DATAWIDTH##_ANY SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength >= (DATAWIDTH) / 8) { \
SET_FLAG(saveflags, s##DATAWIDTH##b); \
SET_FLAG(saveflags, u##DATAWIDTH##b); \
return (DATAWIDTH) / 8; \
} \
else { \
return 0; \
} \
}
DEFINE_INTEGER_MATCHANY_ROUTINE(8)
DEFINE_INTEGER_MATCHANY_ROUTINE(16)
DEFINE_INTEGER_MATCHANY_ROUTINE(32)
DEFINE_INTEGER_MATCHANY_ROUTINE(64)
#define DEFINE_INTEGER_MATCHUPDATE_ROUTINE(DATAWIDTH) \
extern inline unsigned int scan_routine_INTEGER##DATAWIDTH##_UPDATE SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (DATAWIDTH) / 8) \
return 0; \
int ret = 0; \
if (GET_FLAG(old_value, s##DATAWIDTH##b)) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, s##DATAWIDTH##b); \
} \
if (GET_FLAG(old_value, u##DATAWIDTH##b)) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, u##DATAWIDTH##b); \
} \
return ret; \
}
DEFINE_INTEGER_MATCHUPDATE_ROUTINE(8)
DEFINE_INTEGER_MATCHUPDATE_ROUTINE(16)
DEFINE_INTEGER_MATCHUPDATE_ROUTINE(32)
DEFINE_INTEGER_MATCHUPDATE_ROUTINE(64)
#define DEFINE_INTEGER_ROUTINE(DATAWIDTH, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, REVENDIAN, REVEND_STR) \
extern inline unsigned int scan_routine_INTEGER##DATAWIDTH##_##MATCHTYPENAME##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (DATAWIDTH) / 8) \
return 0; \
int ret = 0; \
mem64_t val; \
if (REVENDIAN) { \
val.uint##DATAWIDTH##_value = swap_bytes##DATAWIDTH(memory_ptr->uint##DATAWIDTH##_value); \
memory_ptr = &val; \
} \
if (MEMORY_COMP(VALUE_TO_COMPARE_WITH, s##DATAWIDTH##b, MATCHTYPE)) { \
SET_FLAG(saveflags, s##DATAWIDTH##b); \
ret = (DATAWIDTH) / 8; \
} \
if (MEMORY_COMP(VALUE_TO_COMPARE_WITH, u##DATAWIDTH##b, MATCHTYPE)) { \
SET_FLAG(saveflags, u##DATAWIDTH##b); \
ret = (DATAWIDTH) / 8; \
} \
return ret; \
}
#define DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES(MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH) \
DEFINE_INTEGER_ROUTINE(8, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(16, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(32, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(64, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, )
#define DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES_AND_ENDIANS(MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH) \
DEFINE_INTEGER_ROUTINE(8, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(16, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(32, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(64, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_INTEGER_ROUTINE(16, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 1, _REVENDIAN) \
DEFINE_INTEGER_ROUTINE(32, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 1, _REVENDIAN) \
DEFINE_INTEGER_ROUTINE(64, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 1, _REVENDIAN)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES_AND_ENDIANS(EQUALTO, ==, user_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES_AND_ENDIANS(NOTEQUALTO, !=, user_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES_AND_ENDIANS(GREATERTHAN, >, user_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES_AND_ENDIANS(LESSTHAN, <, user_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES(NOTCHANGED, ==, old_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES(CHANGED, !=, old_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES(INCREASED, >, old_value)
DEFINE_INTEGER_ROUTINE_FOR_ALL_INTEGER_TYPES(DECREASED, <, old_value)
/******************/
/* Float specific */
/******************/
/* for MATCHANY */
#define DEFINE_FLOAT_MATCHANY_ROUTINE(DATAWIDTH) \
extern inline unsigned int scan_routine_FLOAT##DATAWIDTH##_ANY SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength >= (DATAWIDTH) / 8) { \
SET_FLAG(saveflags, f##DATAWIDTH##b); \
return (DATAWIDTH) / 8; \
} \
else { \
return 0; \
} \
}
DEFINE_FLOAT_MATCHANY_ROUTINE(32)
DEFINE_FLOAT_MATCHANY_ROUTINE(64)
#define DEFINE_FLOAT_MATCHUPDATE_ROUTINE(DATAWIDTH) \
extern inline unsigned int scan_routine_FLOAT##DATAWIDTH##_UPDATE SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (DATAWIDTH) / 8) \
return 0; \
int ret = 0; \
if (GET_FLAG(old_value, f##DATAWIDTH##b)) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, f##DATAWIDTH##b); \
} \
return ret; \
}
DEFINE_FLOAT_MATCHUPDATE_ROUTINE(32)
DEFINE_FLOAT_MATCHUPDATE_ROUTINE(64)
#define DEFINE_FLOAT_ROUTINE(DATAWIDTH, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, REVENDIAN, REVEND_STR) \
extern inline unsigned int scan_routine_FLOAT##DATAWIDTH##_##MATCHTYPENAME##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (DATAWIDTH) / 8) \
return 0; \
int ret = 0; \
mem64_t val; \
if (REVENDIAN) { \
val.uint##DATAWIDTH##_value = swap_bytes##DATAWIDTH(memory_ptr->uint##DATAWIDTH##_value); \
memory_ptr = &val; \
} \
if (MEMORY_COMP(VALUE_TO_COMPARE_WITH, f##DATAWIDTH##b, MATCHTYPE)) { \
SET_FLAG(saveflags, f##DATAWIDTH##b); \
ret = (DATAWIDTH) / 8; \
} \
return ret; \
}
#define DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, REVENDIAN, REVEND_STR) \
DEFINE_FLOAT_ROUTINE(32, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, REVENDIAN, REVEND_STR) \
DEFINE_FLOAT_ROUTINE(64, MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, REVENDIAN, REVEND_STR)
#define DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES_AND_ENDIANS(MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH) \
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 0, ) \
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(MATCHTYPENAME, MATCHTYPE, VALUE_TO_COMPARE_WITH, 1, _REVENDIAN)
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES_AND_ENDIANS(EQUALTO, ==, user_value)
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES_AND_ENDIANS(NOTEQUALTO, !=, user_value)
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES_AND_ENDIANS(GREATERTHAN, >, user_value)
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES_AND_ENDIANS(LESSTHAN, <, user_value)
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(NOTCHANGED, ==, old_value, 0, )
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(CHANGED, !=, old_value, 0, )
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(INCREASED, >, old_value, 0, )
DEFINE_FLOAT_ROUTINE_FOR_ALL_FLOAT_TYPES(DECREASED, <, old_value, 0, )
/********************/
/* Special routines */
/********************/
/*---------------------------------*/
/* for INCREASEDBY and DECREASEDBY */
/*---------------------------------*/
#define DEFINE_INTEGER_OPERATIONBY_ROUTINE(DATAWIDTH, NAME, OP) \
extern inline unsigned int scan_routine_INTEGER##DATAWIDTH##_##NAME SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (DATAWIDTH) / 8) \
return 0; \
int ret = 0; \
if ((GET_FLAG(old_value, s##DATAWIDTH##b)) && (GET_FLAG(user_value, s##DATAWIDTH##b)) && (get_s##DATAWIDTH##b(memory_ptr) == get_s##DATAWIDTH##b(old_value) OP get_s##DATAWIDTH##b(user_value))) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, s##DATAWIDTH##b); \
} \
if ((GET_FLAG(old_value, u##DATAWIDTH##b)) && (GET_FLAG(user_value, u##DATAWIDTH##b)) && (get_u##DATAWIDTH##b(memory_ptr) == get_u##DATAWIDTH##b(old_value) OP get_u##DATAWIDTH##b(user_value))) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, u##DATAWIDTH##b); \
} \
return ret; \
}
#define DEFINE_INTEGER_INCREASEDBY_DECREASEDBY_ROUTINE(DATAWIDTH) \
DEFINE_INTEGER_OPERATIONBY_ROUTINE(DATAWIDTH, INCREASEDBY, +) \
DEFINE_INTEGER_OPERATIONBY_ROUTINE(DATAWIDTH, DECREASEDBY, -)
DEFINE_INTEGER_INCREASEDBY_DECREASEDBY_ROUTINE(8)
DEFINE_INTEGER_INCREASEDBY_DECREASEDBY_ROUTINE(16)
DEFINE_INTEGER_INCREASEDBY_DECREASEDBY_ROUTINE(32)
DEFINE_INTEGER_INCREASEDBY_DECREASEDBY_ROUTINE(64)
#define DEFINE_FLOAT_OPERATIONBY_ROUTINE(DATAWIDTH, NAME, OP) \
extern inline unsigned int scan_routine_FLOAT##DATAWIDTH##_##NAME SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (DATAWIDTH) / 8) \
return 0; \
int ret = 0; \
if ((GET_FLAG(old_value, f##DATAWIDTH##b)) && (GET_FLAG(user_value, f##DATAWIDTH##b)) && (get_f##DATAWIDTH##b(memory_ptr) == get_f##DATAWIDTH##b(old_value) OP get_f##DATAWIDTH##b(user_value))) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, f##DATAWIDTH##b); \
} \
return ret; \
}
#define DEFINE_FLOAT_INCREASEDBY_DECREASEDBY_ROUTINE(DATAWIDTH) \
DEFINE_FLOAT_OPERATIONBY_ROUTINE(DATAWIDTH, INCREASEDBY, +) \
DEFINE_FLOAT_OPERATIONBY_ROUTINE(DATAWIDTH, DECREASEDBY, -)
DEFINE_FLOAT_INCREASEDBY_DECREASEDBY_ROUTINE(32)
DEFINE_FLOAT_INCREASEDBY_DECREASEDBY_ROUTINE(64)
/*-----------*/
/* for RANGE */
/*-----------*/
#define DEFINE_INTEGER_RANGE_ROUTINE(DATAWIDTH, REVENDIAN, REVEND_STR) \
extern inline unsigned int scan_routine_INTEGER##DATAWIDTH##_RANGE##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
int ret = 0; \
mem64_t val; \
if (REVENDIAN) { \
val.uint##DATAWIDTH##_value = swap_bytes##DATAWIDTH(memory_ptr->uint##DATAWIDTH##_value); \
memory_ptr = &val; \
} \
if ((memlength >= (DATAWIDTH) / 8) \
&& (user_value[0].flags & flag_s##DATAWIDTH##b) \
&& (get_s##DATAWIDTH##b(memory_ptr) >= get_s##DATAWIDTH##b(&user_value[0])) \
&& (get_s##DATAWIDTH##b(memory_ptr) <= get_s##DATAWIDTH##b(&user_value[1]))) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, s##DATAWIDTH##b); \
} \
if ((memlength >= (DATAWIDTH) / 8) \
&& (user_value[0].flags & flag_u##DATAWIDTH##b) \
&& (get_u##DATAWIDTH##b(memory_ptr) >= get_u##DATAWIDTH##b(&user_value[0])) \
&& (get_u##DATAWIDTH##b(memory_ptr) <= get_u##DATAWIDTH##b(&user_value[1]))) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, u##DATAWIDTH##b); \
} \
return ret; \
}
DEFINE_INTEGER_RANGE_ROUTINE(8, 0, )
DEFINE_INTEGER_RANGE_ROUTINE(16, 0, )
DEFINE_INTEGER_RANGE_ROUTINE(16, 1, _REVENDIAN)
DEFINE_INTEGER_RANGE_ROUTINE(32, 0, )
DEFINE_INTEGER_RANGE_ROUTINE(32, 1, _REVENDIAN)
DEFINE_INTEGER_RANGE_ROUTINE(64, 0, )
DEFINE_INTEGER_RANGE_ROUTINE(64, 1, _REVENDIAN)
#define DEFINE_FLOAT_RANGE_ROUTINE(DATAWIDTH, REVENDIAN, REVEND_STR) \
extern inline unsigned int scan_routine_FLOAT##DATAWIDTH##_RANGE##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
int ret = 0; \
mem64_t val; \
if (REVENDIAN) { \
val.uint##DATAWIDTH##_value = swap_bytes##DATAWIDTH(memory_ptr->uint##DATAWIDTH##_value); \
memory_ptr = &val; \
} \
if ((memlength >= (DATAWIDTH) / 8) \
&& (user_value[0].flags & flag_f##DATAWIDTH##b) \
&& (get_f##DATAWIDTH##b(memory_ptr) >= get_f##DATAWIDTH##b(&user_value[0])) \
&& (get_f##DATAWIDTH##b(memory_ptr) <= get_f##DATAWIDTH##b(&user_value[1]))) { \
ret = (DATAWIDTH) / 8; \
SET_FLAG(saveflags, f##DATAWIDTH##b); \
} \
return ret; \
}
DEFINE_FLOAT_RANGE_ROUTINE(32, 0, )
DEFINE_FLOAT_RANGE_ROUTINE(32, 1, _REVENDIAN)
DEFINE_FLOAT_RANGE_ROUTINE(64, 0, )
DEFINE_FLOAT_RANGE_ROUTINE(64, 1, _REVENDIAN)
/*------------------------*/
/* Any-xxx types specific */
/*------------------------*/
/* this is for anynumber, anyinteger, anyfloat */
#define DEFINE_ANYTYPE_ROUTINE(MATCHTYPENAME, REVEND_STR) \
extern inline unsigned int scan_routine_ANYINTEGER_##MATCHTYPENAME##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
int ret = scan_routine_INTEGER8_##MATCHTYPENAME(memory_ptr, memlength, old_value, user_value, saveflags); \
int tmp_ret; \
if ((tmp_ret = scan_routine_INTEGER16_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags)) > ret) { \
ret = tmp_ret; \
} \
if ((tmp_ret = scan_routine_INTEGER32_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags)) > ret) { \
ret = tmp_ret; \
} \
if ((tmp_ret = scan_routine_INTEGER64_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags)) > ret) { \
ret = tmp_ret; \
} \
return ret; \
} \
extern inline unsigned int scan_routine_ANYFLOAT_##MATCHTYPENAME##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
int ret = scan_routine_FLOAT32_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags); \
int tmp_ret; \
if ((tmp_ret = scan_routine_FLOAT64_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags)) > ret) { \
ret = tmp_ret; \
} \
return ret; \
} \
extern inline unsigned int scan_routine_ANYNUMBER_##MATCHTYPENAME##REVEND_STR SCAN_ROUTINE_ARGUMENTS \
{ \
int ret1 = scan_routine_ANYINTEGER_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags); \
int ret2 = scan_routine_ANYFLOAT_##MATCHTYPENAME##REVEND_STR(memory_ptr, memlength, old_value, user_value, saveflags); \
return (ret1 > ret2 ? ret1 : ret2); \
}
DEFINE_ANYTYPE_ROUTINE(ANY, )
DEFINE_ANYTYPE_ROUTINE(UPDATE, )
DEFINE_ANYTYPE_ROUTINE(EQUALTO, )
DEFINE_ANYTYPE_ROUTINE(NOTEQUALTO, )
DEFINE_ANYTYPE_ROUTINE(CHANGED, )
DEFINE_ANYTYPE_ROUTINE(NOTCHANGED, )
DEFINE_ANYTYPE_ROUTINE(INCREASED, )
DEFINE_ANYTYPE_ROUTINE(DECREASED, )
DEFINE_ANYTYPE_ROUTINE(GREATERTHAN, )
DEFINE_ANYTYPE_ROUTINE(LESSTHAN, )
DEFINE_ANYTYPE_ROUTINE(INCREASEDBY, )
DEFINE_ANYTYPE_ROUTINE(DECREASEDBY, )
DEFINE_ANYTYPE_ROUTINE(RANGE, )
DEFINE_ANYTYPE_ROUTINE(EQUALTO, _REVENDIAN)
DEFINE_ANYTYPE_ROUTINE(NOTEQUALTO, _REVENDIAN)
DEFINE_ANYTYPE_ROUTINE(GREATERTHAN, _REVENDIAN)
DEFINE_ANYTYPE_ROUTINE(LESSTHAN, _REVENDIAN)
DEFINE_ANYTYPE_ROUTINE(RANGE, _REVENDIAN)
/*----------------------------------------*/
/* for generic VLT (Variable Length Type) */
/*----------------------------------------*/
extern inline unsigned int scan_routine_VLT_ANY SCAN_ROUTINE_ARGUMENTS
{
return *saveflags = MIN(memlength, (uint16_t)(-1));
}
extern inline unsigned int scan_routine_VLT_UPDATE SCAN_ROUTINE_ARGUMENTS
{
/* memlength here is already MIN(memlength, old_value->flags.length) */
return *saveflags = memlength;
}
/*---------------*/
/* for BYTEARRAY */
/*---------------*/
/* Used only for length>8 */
extern inline unsigned int scan_routine_BYTEARRAY_EQUALTO SCAN_ROUTINE_ARGUMENTS
{
const uint8_t* bytes_array = user_value->bytearray_value;
const wildcard_t* wildcards_array = user_value->wildcard_value;
unsigned int length = user_value->flags;
if (memlength < length || *((uint64_t*)bytes_array) != (memory_ptr->uint64_value & *((uint64_t*)wildcards_array))) {
/* not matched */
return 0;
}
unsigned int i, j;
for (i = sizeof(uint64_t); i + sizeof(uint64_t) <= length; i += sizeof(uint64_t)) {
if (*((uint64_t*)(bytes_array + i)) != (((mem64_t*)(memory_ptr->bytes + i))->uint64_value & *((uint64_t*)(wildcards_array + i)))) {
/* not matched */
return 0;
}
}
/* match bytes left */
if (i < length) {
for (j = 0; j < length - i; ++j) {
if ((bytes_array + i)[j] != (((mem64_t*)(memory_ptr->bytes + i))->bytes[j] & (wildcards_array + i)[j])) {
/* not matched */
return 0;
}
}
}
/* matched */
*saveflags = length;
return length;
}
/* optimized routines for small lengths
careful: WIDTH = 8*LENGTH */
#define DEFINE_BYTEARRAY_POW2_EQUALTO_ROUTINE(WIDTH) \
extern inline unsigned int scan_routine_BYTEARRAY##WIDTH##_EQUALTO SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength >= (WIDTH) / 8 && ((get_u##WIDTH##b(memory_ptr) & *(uint##WIDTH##_t*)user_value->wildcard_value) == *(uint##WIDTH##_t*)(user_value->bytearray_value))) { \
/* matched */ \
*saveflags = (WIDTH) / 8; \
return (WIDTH) / 8; \
} \
else { \
/* not matched */ \
return 0; \
} \
}
DEFINE_BYTEARRAY_POW2_EQUALTO_ROUTINE(8)
DEFINE_BYTEARRAY_POW2_EQUALTO_ROUTINE(16)
DEFINE_BYTEARRAY_POW2_EQUALTO_ROUTINE(32)
DEFINE_BYTEARRAY_POW2_EQUALTO_ROUTINE(64)
#define DEFINE_BYTEARRAY_SMALLOOP_EQUALTO_ROUTINE(WIDTH) \
extern inline unsigned int scan_routine_BYTEARRAY##WIDTH##_EQUALTO SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (WIDTH) / 8) { \
/* new_value is not actually a valid bytearray */ \
return 0; \
} \
const uint8_t* bytes_array = user_value->bytearray_value; \
const wildcard_t* wildcards_array = user_value->wildcard_value; \
int i; \
for (i = 0; i < (WIDTH) / 8; ++i) { \
if (bytes_array[i] != (memory_ptr->bytes[i] & wildcards_array[i])) { \
/* not matched */ \
return 0; \
} \
} \
/* matched */ \
*saveflags = (WIDTH) / 8; \
return (WIDTH) / 8; \
}
DEFINE_BYTEARRAY_SMALLOOP_EQUALTO_ROUTINE(24)
DEFINE_BYTEARRAY_SMALLOOP_EQUALTO_ROUTINE(40)
DEFINE_BYTEARRAY_SMALLOOP_EQUALTO_ROUTINE(48)
DEFINE_BYTEARRAY_SMALLOOP_EQUALTO_ROUTINE(56)
/*------------*/
/* for STRING */
/*------------*/
/* Used only for length>8 */
extern inline unsigned int scan_routine_STRING_EQUALTO SCAN_ROUTINE_ARGUMENTS
{
const char* scan_string = user_value->string_value;
unsigned int length = user_value->flags;
if (memlength < length || memory_ptr->int64_value != *((int64_t*)scan_string)) {
/* not matched */
return 0;
}
unsigned int i, j;
for (i = sizeof(int64_t); i + sizeof(int64_t) <= length; i += sizeof(int64_t)) {
if (((mem64_t*)(memory_ptr->chars + i))->int64_value != *((int64_t*)(scan_string + i))) {
/* not matched */
return 0;
}
}
/* match bytes left */
if (i < length) {
for (j = 0; j < length - i; ++j) {
if (((mem64_t*)(memory_ptr->chars + i))->chars[j] != (scan_string + i)[j]) {
/* not matched */
return 0;
}
}
}
/* matched */
*saveflags = length;
return length;
}
/* optimized routines for small strings
careful: WIDTH = 8*LENGTH */
#define DEFINE_STRING_POW2_EQUALTO_ROUTINE(WIDTH) \
extern inline unsigned int scan_routine_STRING##WIDTH##_EQUALTO SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength >= (WIDTH) / 8 && (get_s##WIDTH##b(memory_ptr) == *(int##WIDTH##_t*)(user_value->string_value))) { \
/* matched */ \
*saveflags = (WIDTH) / 8; \
return (WIDTH) / 8; \
} \
else { \
/* not matched */ \
return 0; \
} \
}
DEFINE_STRING_POW2_EQUALTO_ROUTINE(8)
DEFINE_STRING_POW2_EQUALTO_ROUTINE(16)
DEFINE_STRING_POW2_EQUALTO_ROUTINE(32)
DEFINE_STRING_POW2_EQUALTO_ROUTINE(64)
#define DEFINE_STRING_SMALLOOP_EQUALTO_ROUTINE(WIDTH) \
extern inline unsigned int scan_routine_STRING##WIDTH##_EQUALTO SCAN_ROUTINE_ARGUMENTS \
{ \
if (memlength < (WIDTH) / 8) { \
/* new_value is not actually a valid string */ \
return 0; \
} \
const char* scan_string = user_value->string_value; \
int i; \
for (i = 0; i < (WIDTH) / 8; ++i) { \
if (memory_ptr->chars[i] != scan_string[i]) { \
/* not matched */ \
return 0; \
} \
} \
/* matched */ \
*saveflags = (WIDTH) / 8; \
return (WIDTH) / 8; \
}
DEFINE_STRING_SMALLOOP_EQUALTO_ROUTINE(24)
DEFINE_STRING_SMALLOOP_EQUALTO_ROUTINE(40)
DEFINE_STRING_SMALLOOP_EQUALTO_ROUTINE(48)
DEFINE_STRING_SMALLOOP_EQUALTO_ROUTINE(56)
/***************************************************************/
/* choose a routine according to scan_data_type and match_type */
/***************************************************************/
#define CHOOSE_ROUTINE(SCANDATATYPE, ROUTINEDATATYPENAME, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
if ((dt == SCANDATATYPE) && (mt == SCANMATCHTYPE)) { \
return &scan_routine_##ROUTINEDATATYPENAME##_##ROUTINEMATCHTYPENAME; \
}
#define CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(SCANDATATYPE, ROUTINEDATATYPENAME, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
if ((dt == SCANDATATYPE) && (mt == SCANMATCHTYPE)) { \
if (reverse_endianness) { \
return &scan_routine_##ROUTINEDATATYPENAME##_##ROUTINEMATCHTYPENAME##_REVENDIAN; \
} \
else { \
return &scan_routine_##ROUTINEDATATYPENAME##_##ROUTINEMATCHTYPENAME; \
} \
}
#define CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(INTEGER8, INTEGER8, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(INTEGER16, INTEGER16, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(INTEGER32, INTEGER32, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(INTEGER64, INTEGER64, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(FLOAT32, FLOAT32, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(FLOAT64, FLOAT64, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(ANYINTEGER, ANYINTEGER, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(ANYFLOAT, ANYFLOAT, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(ANYNUMBER, ANYNUMBER, SCANMATCHTYPE, ROUTINEMATCHTYPENAME)
#define CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES_AND_ENDIANS(SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE(INTEGER8, INTEGER8, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(INTEGER16, INTEGER16, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(INTEGER32, INTEGER32, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(INTEGER64, INTEGER64, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(FLOAT32, FLOAT32, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(FLOAT64, FLOAT64, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(ANYINTEGER, ANYINTEGER, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(ANYFLOAT, ANYFLOAT, SCANMATCHTYPE, ROUTINEMATCHTYPENAME) \
CHOOSE_ROUTINE_FOR_BOTH_ENDIANS(ANYNUMBER, ANYNUMBER, SCANMATCHTYPE, ROUTINEMATCHTYPENAME)
#define SELECTION_CASE(ROUTINEDATATYPENAME, WIDTH, ROUTINEMATCHTYPENAME) \
case (WIDTH): \
return &scan_routine_##ROUTINEDATATYPENAME##WIDTH##_##ROUTINEMATCHTYPENAME; \
break;
#define CHOOSE_ROUTINE_VLT(SCANDATATYPE, ROUTINEDATATYPENAME, SCANMATCHTYPE, ROUTINEMATCHTYPENAME, WIDTH) \
if ((dt == SCANDATATYPE) && (mt == SCANMATCHTYPE)) { \
switch (WIDTH) { \
case 0: \
assert(false); \
break; \
SELECTION_CASE(ROUTINEDATATYPENAME, 8, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 16, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 24, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 32, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 40, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 48, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 56, ROUTINEMATCHTYPENAME) \
SELECTION_CASE(ROUTINEDATATYPENAME, 64, ROUTINEMATCHTYPENAME) \
default: \
return &scan_routine_##ROUTINEDATATYPENAME##_##ROUTINEMATCHTYPENAME; \
break; \
} \
}
scan_routine_t sm_get_scanroutine(scan_data_type_t dt, scan_match_type_t mt, match_flags uflags, bool reverse_endianness)
{
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHANY, ANY)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHUPDATE, UPDATE)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES_AND_ENDIANS(MATCHEQUALTO, EQUALTO)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES_AND_ENDIANS(MATCHNOTEQUALTO, NOTEQUALTO)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES_AND_ENDIANS(MATCHGREATERTHAN, GREATERTHAN)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES_AND_ENDIANS(MATCHLESSTHAN, LESSTHAN)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHCHANGED, CHANGED)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHNOTCHANGED, NOTCHANGED)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHINCREASED, INCREASED)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHDECREASED, DECREASED)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHINCREASEDBY, INCREASEDBY)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES(MATCHDECREASEDBY, DECREASEDBY)
CHOOSE_ROUTINE_FOR_ALL_NUMBER_TYPES_AND_ENDIANS(MATCHRANGE, RANGE)
CHOOSE_ROUTINE(BYTEARRAY, VLT, MATCHANY, ANY)
CHOOSE_ROUTINE(BYTEARRAY, VLT, MATCHUPDATE, UPDATE)
CHOOSE_ROUTINE_VLT(BYTEARRAY, BYTEARRAY, MATCHEQUALTO, EQUALTO, uflags * 8)
CHOOSE_ROUTINE(STRING, VLT, MATCHANY, ANY)
CHOOSE_ROUTINE(STRING, VLT, MATCHUPDATE, UPDATE)
CHOOSE_ROUTINE_VLT(STRING, STRING, MATCHEQUALTO, EQUALTO, uflags * 8)
return NULL;
}
/* Possible flags per scan data type: if an incoming uservalue has none of the
* listed flags we're sure it's not going to be matched by the scan,
* so we reject it without even trying */
static match_flags possible_flags_for_scan_data_type[] = {
[ANYNUMBER] = flags_all,
[ANYINTEGER] = flags_integer,
[ANYFLOAT] = flags_float,
[INTEGER8] = flags_i8b,
[INTEGER16] = flags_i16b,
[INTEGER32] = flags_i32b,
[INTEGER64] = flags_i64b,
[FLOAT32] = flag_f32b,
[FLOAT64] = flag_f64b,
[BYTEARRAY] = flags_max,
[STRING] = flags_max
};
bool sm_choose_scanroutine(scan_data_type_t dt, scan_match_type_t mt, const uservalue_t* uval, bool reverse_endianness)
{
match_flags uflags = uval ? uval->flags : flags_empty;
/* Check scans that need an uservalue */
if (mt == MATCHEQUALTO || mt == MATCHNOTEQUALTO || mt == MATCHGREATERTHAN || mt == MATCHLESSTHAN || mt == MATCHRANGE || mt == MATCHINCREASEDBY || mt == MATCHDECREASEDBY) {
match_flags possible_flags = possible_flags_for_scan_data_type[dt];
if ((possible_flags & uflags) == flags_empty) {
/* There's no possibility to have a match, just abort */
sm_scan_routine = NULL;
return false;
}
}
sm_scan_routine = sm_get_scanroutine(dt, mt, uflags, reverse_endianness);
return (sm_scan_routine != NULL);
}