145 lines
4.4 KiB
C
145 lines
4.4 KiB
C
/*
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* Copyright (c) 2010, Swedish Institute of Computer Science
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* All rights reserved.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. 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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* 3. Neither the name of the Institute 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 INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* 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 INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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*/
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/**
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* \file
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* Definitions and declarations for the Propositional Logic Engine.
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* \author
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* Nicolas Tsiftes <nvt@sics.se>
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*/
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#ifndef LVM_H
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#define LVM_H
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#include <stdlib.h>
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#include "db-options.h"
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enum lvm_status {
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LVM_FALSE = 0,
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LVM_TRUE = 1,
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LVM_INVALID_IDENTIFIER = 2,
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LVM_SEMANTIC_ERROR = 3,
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LVM_MATH_ERROR = 4,
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LVM_STACK_OVERFLOW = 5,
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LVM_TYPE_ERROR = 6,
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LVM_VARIABLE_LIMIT_REACHED = 7,
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LVM_EXECUTION_ERROR = 8,
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LVM_DERIVATION_ERROR = 9
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};
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typedef enum lvm_status lvm_status_t;
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#define LVM_ERROR(x) (x >= 2)
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typedef int lvm_ip_t;
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struct lvm_instance {
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unsigned char *code;
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lvm_ip_t size;
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lvm_ip_t end;
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lvm_ip_t ip;
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unsigned error;
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};
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typedef struct lvm_instance lvm_instance_t;
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enum node_type {
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LVM_ARITH_OP = 0x10,
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LVM_OPERAND = 0x20,
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LVM_CMP_OP = 0x40,
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LVM_CONNECTIVE = 0x80
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};
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typedef enum node_type node_type_t;
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enum operator {
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LVM_ADD = LVM_ARITH_OP | 1,
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LVM_SUB = LVM_ARITH_OP | 2,
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LVM_MUL = LVM_ARITH_OP | 3,
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LVM_DIV = LVM_ARITH_OP | 4,
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LVM_EQ = LVM_CMP_OP | 1,
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LVM_NEQ = LVM_CMP_OP | 2,
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LVM_GE = LVM_CMP_OP | 3,
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LVM_GEQ = LVM_CMP_OP | 4,
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LVM_LE = LVM_CMP_OP | 5,
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LVM_LEQ = LVM_CMP_OP | 6,
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LVM_AND = LVM_CONNECTIVE | 1,
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LVM_OR = LVM_CONNECTIVE | 2,
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LVM_NOT = LVM_CONNECTIVE | 3
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};
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typedef enum operator operator_t;
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enum operand_type {
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LVM_VARIABLE,
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LVM_FLOAT,
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LVM_LONG
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};
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typedef enum operand_type operand_type_t;
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typedef unsigned char variable_id_t;
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typedef union {
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long l;
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#if LVM_USE_FLOATS
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float f;
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#endif
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variable_id_t id;
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} operand_value_t;
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struct operand {
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operand_type_t type;
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operand_value_t value;
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};
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typedef struct operand operand_t;
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void lvm_reset(lvm_instance_t *p, unsigned char *code, lvm_ip_t size);
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void lvm_clone(lvm_instance_t *dst, lvm_instance_t *src);
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lvm_status_t lvm_derive(lvm_instance_t *p);
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lvm_status_t lvm_get_derived_range(lvm_instance_t *p, char *name,
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operand_value_t *min,
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operand_value_t *max);
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void lvm_print_derivations(lvm_instance_t *p);
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lvm_status_t lvm_execute(lvm_instance_t *p);
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lvm_status_t lvm_register_variable(char *name, operand_type_t type);
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lvm_status_t lvm_set_variable_value(char *name, operand_value_t value);
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void lvm_print_code(lvm_instance_t *p);
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lvm_ip_t lvm_jump_to_operand(lvm_instance_t *p);
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lvm_ip_t lvm_shift_for_operator(lvm_instance_t *p, lvm_ip_t end);
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lvm_ip_t lvm_get_end(lvm_instance_t *p);
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lvm_ip_t lvm_set_end(lvm_instance_t *p, lvm_ip_t end);
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lvm_status_t lvm_set_op(lvm_instance_t *p, operator_t op);
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lvm_status_t lvm_set_relation(lvm_instance_t *p, operator_t op);
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lvm_status_t lvm_set_operand(lvm_instance_t *p, operand_t *op);
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lvm_status_t lvm_set_long(lvm_instance_t *p, long l);
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lvm_status_t lvm_set_variable(lvm_instance_t *p, char *name);
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#endif /* LVM_H */
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