1 | using System;
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2 | using System.Collections.Generic;
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3 |
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4 | namespace Lextm.SharpSnmpLib.Mib
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5 | {
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6 | public class ValueMap : Dictionary<Int64, string>
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7 | {
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8 | public ValueMap()
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9 | {
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10 | }
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11 |
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12 | /// <summary>
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13 | /// Returns the values of the map as continous range. At best as one range.
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14 | /// </summary>
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15 | /// <returns></returns>
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16 | public ValueRanges GetContinousRanges()
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17 | {
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18 | ValueRanges result = new ValueRanges();
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19 |
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20 | if (this.Count > 0)
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21 | {
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22 | List<Int64> values = new List<long>(this.Keys);
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23 | values.Sort();
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24 |
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25 | Int64 last = values[0];
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26 | Int64 offset = values[0];
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27 | for (int i=1; i<values.Count; i++)
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28 | {
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29 | if (values[i] != last + 1)
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30 | {
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31 | if (last == offset)
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32 | {
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33 | result.Add(new ValueRange(offset, null));
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34 | }
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35 | else
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36 | {
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37 | result.Add(new ValueRange(offset, last));
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38 | }
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39 |
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40 | offset = values[i];
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41 | }
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42 |
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43 | last = values[i];
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44 | }
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45 |
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46 | if (last == offset)
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47 | {
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48 | result.Add(new ValueRange(offset, null));
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49 | }
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50 | else
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51 | {
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52 | result.Add(new ValueRange(offset, last));
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53 | }
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54 | }
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55 |
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56 | return result;
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57 | }
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58 |
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59 | /// <summary>
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60 | /// Gets the highest value contained in this value map.
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61 | /// </summary>
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62 | /// <returns></returns>
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63 | public Int64 GetHighestValue()
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64 | {
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65 | Int64 result = 0;
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66 |
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67 | foreach (Int64 value in this.Keys)
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68 | {
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69 | if (value > result)
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70 | {
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71 | result = value;
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72 | }
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73 | }
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74 |
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75 | return result;
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76 | }
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77 |
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78 | /// <summary>
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79 | /// Interprets the single values as bit positions and creates a mask of it.
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80 | /// </summary>
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81 | /// <returns></returns>
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82 | public UInt32 GetBitMask()
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83 | {
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84 | UInt32 result = 0;
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85 |
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86 | foreach (Int64 key in this.Keys)
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87 | {
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88 | if (key < 0)
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89 | {
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90 | throw new NotSupportedException("Negative numbers are not allowed for Bits!");
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91 | }
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92 | if (key > 31)
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93 | {
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94 | throw new NotSupportedException("Bits with more than 32 bits are not supported!");
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95 | }
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96 |
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97 | result |= (UInt32)(1 << (int)key);
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98 | }
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99 |
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100 | return result;
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101 | }
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102 | }
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103 | }
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