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1 /*******************************************************************************
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2
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3 copyright: Copyright (c) 2007 Kris Bell. All rights reserved
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4
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5 license: BSD style: $(LICENSE)
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6
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7 version: Initial release: Nov 2007
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8
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9 author: Kris
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10
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11 *******************************************************************************/
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12
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13 module tango.io.stream.DataFileStream;
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14
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15 private import tango.io.FileConduit;
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16
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17 private import tango.io.stream.DataStream;
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18
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19 /*******************************************************************************
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20
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21 Composes a seekable file with buffered binary input. A seek causes
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22 the input buffer to be cleared
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23
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24 *******************************************************************************/
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25
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26 class DataFileInput : DataInput
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27 {
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28 private FileConduit conduit;
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29
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30 /***********************************************************************
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31
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32 Wrap a FileConduit instance
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33
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34 ***********************************************************************/
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35
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36 this (FileConduit file, uint buffer=uint.max)
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37 {
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38 super (conduit = file, buffer);
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39 }
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40
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41 /***********************************************************************
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42
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43 Set the file seek position to the specified offset, and
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44 clear the input buffer
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45
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46 ***********************************************************************/
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47
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48 final long seek (long offset)
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49 {
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50 host.clear;
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51 return conduit.seek (offset);
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52 }
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53
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54 /***********************************************************************
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55
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56 Return the underlying conduit
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57
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58 ***********************************************************************/
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59
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60 final FileConduit file ()
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61 {
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62 return conduit;
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63 }
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64 }
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65
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66
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67 /*******************************************************************************
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68
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69 Composes a seekable file with buffered binary output. A seek causes
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70 the output buffer to be flushed first
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71
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72 *******************************************************************************/
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73
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74 class DataFileOutput : DataOutput
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75 {
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76 private FileConduit conduit;
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77
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78 /***********************************************************************
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79
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80 Wrap a FileConduit instance
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81
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82 ***********************************************************************/
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83
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84 this (FileConduit file, uint buffer=uint.max)
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85 {
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86 super (conduit = file, buffer);
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87 }
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88
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89 /***********************************************************************
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90
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91 Set the file seek position to the specified offset, after
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92 flushing the output buffer
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93
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94 ***********************************************************************/
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95
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96 final long seek (long offset)
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97 {
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98 host.flush;
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99 return conduit.seek (offset);
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100 }
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101
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102 /***********************************************************************
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103
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104 Return the underlying conduit
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105
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106 ***********************************************************************/
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107
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108 final FileConduit file ()
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109 {
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110 return conduit;
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111 }
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112 }
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113
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114
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115 /*******************************************************************************
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116
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117 *******************************************************************************/
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118
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119 debug (UnitTest)
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120 {
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121 }
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