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annotate orange/serialization/archives/Archive.d @ 20:9a575087b961

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Added support for slices. Strings and arrays are now treated as references.
author Jacob Carlborg <doob@me.com>
date Mon, 04 Oct 2010 18:27:21 +0200
parents 3d42ea434d46
children 55f0a9d5df8d
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1 /**
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2 * Copyright: Copyright (c) 2010 Jacob Carlborg.
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3 * Authors: Jacob Carlborg
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4 * Version: Initial created: Feb 6, 2010
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5 * License: $(LINK2 http://www.boost.org/LICENSE_1_0.txt, Boost Software License 1.0)
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6 */
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7 module orange.serialization.archives.Archive;
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8
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9 version (Tango)
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10 import tango.util.Convert;
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12 else
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13 {
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14 import std.conv;
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15 alias ConvError ConversionException;
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16 }
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18 import orange.serialization.archives.ArchiveException;
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19
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20 struct Slice
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21 {
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22 size_t length;
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23 void* ptr;
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24
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25 static Slice opCall (T) (T[] value)
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26 {
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27 Slice slice;
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28 slice.length = value.length;
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29 slice.ptr = value.ptr;
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30
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31 return slice;
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32 }
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33 }
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35 interface IArchive
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36 {
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37 void beginArchiving ();
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38 void reset ();
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39 }
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40
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41 abstract class Archive (U) : IArchive
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42 {
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43 version (Tango) alias U[] DataType;
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44 else mixin ("alias immutable(U)[] DataType;");
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45
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46 alias void delegate (ArchiveException exception, DataType[] data) ErrorCallback;
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47
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48 ErrorCallback errorCallback;
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49
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50 abstract void beginArchiving ();
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51 abstract void beginUnarchiving (DataType data);
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52 abstract DataType data ();
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53 abstract void reset ();
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54
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55 protected DataType toDataType (T) (T value)
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56 {
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57 try
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58 return to!(DataType)(value);
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59
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60 catch (ConversionException e)
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61 throw new ArchiveException(e);
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62 }
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63
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64 protected T fromDataType (T) (DataType value)
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65 {
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66 try
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67 return to!(T)(value);
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68
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69 catch (ConversionException e)
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70 throw new ArchiveException(e);
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71 }
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72
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73 protected bool isSliceOf (T, U = T) (T[] a, U[] b)
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74 {
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75 void* aPtr = a.ptr;
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76 void* bPtr = b.ptr;
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78 return aPtr >= bPtr && aPtr + a.length * T.sizeof <= bPtr + b.length * U.sizeof;
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79 }
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80 }