1 | /*
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2 | * Copyright (c) 2001-2004 Swedish Institute of Computer Science.
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3 | * All rights reserved.
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4 | *
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5 | * Redistribution and use in source and binary forms, with or without modification,
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6 | * are permitted provided that the following conditions are met:
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7 | *
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8 | * 1. Redistributions of source code must retain the above copyright notice,
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9 | * this list of conditions and the following disclaimer.
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10 | * 2. Redistributions in binary form must reproduce the above copyright notice,
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11 | * this list of conditions and the following disclaimer in the documentation
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12 | * and/or other materials provided with the distribution.
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13 | * 3. The name of the author may not be used to endorse or promote products
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14 | * derived from this software without specific prior written permission.
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15 | *
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16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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17 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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18 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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19 | * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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20 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
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21 | * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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22 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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23 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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24 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
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25 | * OF SUCH DAMAGE.
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26 | *
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27 | * This file is part of the lwIP TCP/IP stack.
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28 | *
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29 | * Author: Martin Hentschel <info@cl-soft.de>
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30 | *
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31 | */
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32 |
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33 | using System;
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34 | using System.Text;
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35 | using CCodeGeneration;
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36 |
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37 | namespace LwipSnmpCodeGeneration
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38 | {
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39 | public class SnmpScalarNodeBits : SnmpScalarNode
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40 | {
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41 | private readonly uint bitCount;
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42 |
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43 | public SnmpScalarNodeBits(SnmpTreeNode parentNode, uint bitCount)
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44 | : base(parentNode)
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45 | {
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46 | this.DataType = SnmpDataType.Bits;
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47 | this.bitCount = bitCount;
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48 | }
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49 |
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50 | public override void GenerateGetMethodCode(CodeContainerBase container, string valueVarName, ref bool valueVarUsed, string retLenVarName)
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51 | {
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52 | container.AddCode(String.Format(
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53 | "{0} = snmp_encode_bits(({1} *){2}, SNMP_MAX_VALUE_SIZE, 0 /* TODO: pass real value here */, {3});",
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54 | retLenVarName,
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55 | LwipDefs.Vt_U8,
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56 | valueVarName,
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57 | this.bitCount));
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58 |
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59 | valueVarUsed = true;
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60 | }
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61 |
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62 | public override void GenerateTestMethodCode(CodeContainerBase container, string valueVarName, ref bool valueVarUsed, string lenVarName, ref bool lenVarUsed, string retErrVarName)
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63 | {
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64 | if (this.Restrictions.Count > 0)
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65 | {
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66 | const string bitVarName = "bits";
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67 |
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68 | container.Declarations.Add(new VariableDeclaration(new VariableType(bitVarName, LwipDefs.Vt_U32)));
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69 |
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70 | IfThenElse ite = new IfThenElse(String.Format(
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71 | "snmp_decode_bits(({0} *){1}, {2}, &{3}) == ERR_OK",
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72 | LwipDefs.Vt_U8,
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73 | valueVarName,
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74 | lenVarName,
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75 | bitVarName));
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76 |
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77 | valueVarUsed = true;
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78 | lenVarUsed = true;
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79 |
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80 | StringBuilder innerIfCond = new StringBuilder();
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81 | foreach (IRestriction restriction in this.Restrictions)
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82 | {
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83 | innerIfCond.Append(restriction.GetCheckCodeValid(bitVarName));
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84 | innerIfCond.Append(" || ");
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85 | }
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86 |
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87 | innerIfCond.Length -= 4;
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88 |
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89 | IfThenElse innerIte = new IfThenElse(innerIfCond.ToString());
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90 | innerIte.AddCode(String.Format("{0} = {1};", retErrVarName, LwipDefs.Def_ErrorCode_Ok));
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91 | ite.AddElement(innerIte);
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92 | container.AddElement(ite);
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93 | }
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94 | else
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95 | {
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96 | base.GenerateTestMethodCode(container, valueVarName, ref valueVarUsed, lenVarName, ref lenVarUsed, retErrVarName);
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97 | }
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98 | }
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99 |
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100 | public override void GenerateSetMethodCode(CodeContainerBase container, string valueVarName, ref bool valueVarUsed, string lenVarName, ref bool lenVarUsed, string retErrVarName)
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101 | {
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102 | const string bitVarName = "bits";
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103 |
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104 | container.Declarations.Add(new VariableDeclaration(new VariableType(bitVarName, LwipDefs.Vt_U32)));
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105 |
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106 | IfThenElse ite = new IfThenElse(String.Format(
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107 | "snmp_decode_bits(({0} *){1}, {2}, &{3}) == ERR_OK",
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108 | LwipDefs.Vt_U8,
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109 | valueVarName,
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110 | lenVarName,
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111 | bitVarName));
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112 |
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113 | valueVarUsed = true;
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114 | lenVarUsed = true;
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115 |
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116 | ite.AddElement(new Comment(String.Format("TODO: store new value contained in '{0}' here", bitVarName), singleLine: true));
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117 |
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118 | container.AddElement(ite);
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119 | }
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120 | }
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121 | }
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