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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | +using System.Linq; |
| 4 | +using System.Text; |
| 5 | + |
| 6 | +namespace Npgsql.BackendMessages |
| 7 | +{ |
| 8 | + abstract class CopyResponseMessageBase : IBackendMessage |
| 9 | + { |
| 10 | + public abstract BackendMessageCode Code { get; } |
| 11 | + |
| 12 | + internal bool IsBinary { get; private set; } |
| 13 | + internal short NumColumns { get; private set; } |
| 14 | + internal List<FormatCode> ColumnFormatCodes { get; private set; } |
| 15 | + |
| 16 | + internal CopyResponseMessageBase() |
| 17 | + { |
| 18 | + ColumnFormatCodes = new List<FormatCode>(); |
| 19 | + } |
| 20 | + |
| 21 | + internal void Load(NpgsqlBuffer buf) |
| 22 | + { |
| 23 | + ColumnFormatCodes.Clear(); |
| 24 | + |
| 25 | + var binaryIndicator = buf.ReadByte(); |
| 26 | + switch (binaryIndicator) { |
| 27 | + case 0: |
| 28 | + IsBinary = false; |
| 29 | + break; |
| 30 | + case 1: |
| 31 | + IsBinary = true; |
| 32 | + break; |
| 33 | + default: |
| 34 | + throw new Exception("Invalid binary indicator in CopyInResponse message: " + binaryIndicator); |
| 35 | + } |
| 36 | + |
| 37 | + NumColumns = buf.ReadInt16(); |
| 38 | + for (var i = 0; i < NumColumns; i++) |
| 39 | + ColumnFormatCodes.Add((FormatCode)buf.ReadInt16()); |
| 40 | + } |
| 41 | + } |
| 42 | + |
| 43 | + class CopyInResponseMessage : CopyResponseMessageBase |
| 44 | + { |
| 45 | + public override BackendMessageCode Code { get { return BackendMessageCode.CopyInResponse; } } |
| 46 | + |
| 47 | + internal new CopyInResponseMessage Load(NpgsqlBuffer buf) |
| 48 | + { |
| 49 | + base.Load(buf); |
| 50 | + return this; |
| 51 | + } |
| 52 | + } |
| 53 | + |
| 54 | + class CopyOutResponseMessage : CopyResponseMessageBase |
| 55 | + { |
| 56 | + public override BackendMessageCode Code { get { return BackendMessageCode.CopyOutResponse; } } |
| 57 | + |
| 58 | + internal new CopyOutResponseMessage Load(NpgsqlBuffer buf) |
| 59 | + { |
| 60 | + base.Load(buf); |
| 61 | + return this; |
| 62 | + } |
| 63 | + } |
| 64 | + |
| 65 | + class CopyBothResponseMessage : CopyResponseMessageBase |
| 66 | + { |
| 67 | + public override BackendMessageCode Code { get { return BackendMessageCode.CopyBothResponse; } } |
| 68 | + |
| 69 | + internal new CopyBothResponseMessage Load(NpgsqlBuffer buf) |
| 70 | + { |
| 71 | + base.Load(buf); |
| 72 | + return this; |
| 73 | + } |
| 74 | + } |
| 75 | + |
| 76 | + /// <summary> |
| 77 | + /// Note that this message doesn't actually contain the data, but only the length. Data is processed |
| 78 | + /// directly from the connector's buffer. |
| 79 | + /// </summary> |
| 80 | + class CopyDataMessage : IBackendMessage |
| 81 | + { |
| 82 | + public BackendMessageCode Code { get { return BackendMessageCode.CopyData; } } |
| 83 | + |
| 84 | + public int Length { get; private set; } |
| 85 | + |
| 86 | + internal CopyDataMessage Load(int len) |
| 87 | + { |
| 88 | + Length = len; |
| 89 | + return this; |
| 90 | + } |
| 91 | + } |
| 92 | + |
| 93 | + /// <remarks> |
| 94 | + /// Note: This message is both a frontend and a backend message |
| 95 | + /// </remarks> |
| 96 | + class CopyDoneMessage : SimpleFrontendMessage, IBackendMessage |
| 97 | + { |
| 98 | + public BackendMessageCode Code { get { return BackendMessageCode.CopyDone; } } |
| 99 | + internal static readonly CopyDoneMessage Instance = new CopyDoneMessage(); |
| 100 | + CopyDoneMessage() { } |
| 101 | + |
| 102 | + internal override int Length { get { return 5; } } |
| 103 | + |
| 104 | + internal override void Write(NpgsqlBuffer buf) |
| 105 | + { |
| 106 | + buf.WriteByte((byte)BackendMessageCode.CopyDone); |
| 107 | + buf.WriteInt32(4); |
| 108 | + } |
| 109 | + } |
| 110 | +} |
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