source: azure_iot_hub_f767zi/trunk/asp_baseplatform/lwip/contrib-2.1.0/apps/LwipMibCompiler/LwipSnmpCodeGeneration/SnmpScalarNodeBits.cs@ 457

/*
 * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * This file is part of the lwIP TCP/IP stack.
 *
 * Author: Martin Hentschel <info@cl-soft.de>
 *
 */

using System;
using System.Text;
using CCodeGeneration;

namespace LwipSnmpCodeGeneration
{
        public class SnmpScalarNodeBits : SnmpScalarNode
        {
                private readonly uint bitCount;

                public SnmpScalarNodeBits(SnmpTreeNode parentNode, uint bitCount)
                        : base(parentNode)
                {
                        this.DataType = SnmpDataType.Bits;
                        this.bitCount = bitCount;
                }

                public override void GenerateGetMethodCode(CodeContainerBase container, string valueVarName, ref bool valueVarUsed, string retLenVarName)
                {
                        container.AddCode(String.Format(
                                "{0} = snmp_encode_bits(({1} *){2}, SNMP_MAX_VALUE_SIZE, 0 /* TODO: pass real value here */, {3});",
                                retLenVarName, 
                                LwipDefs.Vt_U8,
                                valueVarName,
                                this.bitCount));
                        
                        valueVarUsed = true;
                }

                public override void GenerateTestMethodCode(CodeContainerBase container, string valueVarName, ref bool valueVarUsed, string lenVarName, ref bool lenVarUsed, string retErrVarName)
                {
                        if (this.Restrictions.Count > 0)
                        {
                                const string bitVarName = "bits";

                                container.Declarations.Add(new VariableDeclaration(new VariableType(bitVarName, LwipDefs.Vt_U32)));

                                IfThenElse ite = new IfThenElse(String.Format(
                                        "snmp_decode_bits(({0} *){1}, {2}, &{3}) == ERR_OK",
                                        LwipDefs.Vt_U8,
                                        valueVarName,
                                        lenVarName,
                                        bitVarName));

                                valueVarUsed = true;
                                lenVarUsed = true;

                                StringBuilder innerIfCond = new StringBuilder();
                                foreach (IRestriction restriction in this.Restrictions)
                                {
                                        innerIfCond.Append(restriction.GetCheckCodeValid(bitVarName));
                                        innerIfCond.Append(" || ");
                                }

                                innerIfCond.Length -= 4;

                                IfThenElse innerIte = new IfThenElse(innerIfCond.ToString());
                                innerIte.AddCode(String.Format("{0} = {1};", retErrVarName, LwipDefs.Def_ErrorCode_Ok));
                                ite.AddElement(innerIte);
                                container.AddElement(ite);
                        }
                        else
                        {
                                base.GenerateTestMethodCode(container, valueVarName, ref valueVarUsed, lenVarName, ref lenVarUsed, retErrVarName);
                        }
                }

                public override void GenerateSetMethodCode(CodeContainerBase container, string valueVarName, ref bool valueVarUsed, string lenVarName, ref bool lenVarUsed, string retErrVarName)
                {
                        const string bitVarName = "bits";

                        container.Declarations.Add(new VariableDeclaration(new VariableType(bitVarName, LwipDefs.Vt_U32)));

                        IfThenElse ite = new IfThenElse(String.Format(
                                "snmp_decode_bits(({0} *){1}, {2}, &{3}) == ERR_OK",
                                LwipDefs.Vt_U8,
                                valueVarName,
                                lenVarName,
                                bitVarName));

                        valueVarUsed = true;
                        lenVarUsed = true;

                        ite.AddElement(new Comment(String.Format("TODO: store new value contained in '{0}' here", bitVarName), singleLine: true));

                        container.AddElement(ite);
                }
        }
}