Mercurial > hg > CbC > CbC_gcc
annotate zlib/contrib/ada/read.adb @ 51:ae3a4bfb450b
add some files of version 4.4.3 that have been forgotten.
author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
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date | Sun, 07 Feb 2010 18:27:48 +0900 |
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rev | line source |
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51
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1 ---------------------------------------------------------------- |
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2 -- ZLib for Ada thick binding. -- |
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3 -- -- |
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4 -- Copyright (C) 2002-2003 Dmitriy Anisimkov -- |
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5 -- -- |
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6 -- Open source license information is in the zlib.ads file. -- |
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7 ---------------------------------------------------------------- |
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8 |
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9 -- $Id: read.adb,v 1.8 2004/05/31 10:53:40 vagul Exp $ |
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10 |
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11 -- Test/demo program for the generic read interface. |
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12 |
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13 with Ada.Numerics.Discrete_Random; |
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14 with Ada.Streams; |
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15 with Ada.Text_IO; |
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16 |
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17 with ZLib; |
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18 |
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19 procedure Read is |
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20 |
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21 use Ada.Streams; |
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22 |
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23 ------------------------------------ |
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24 -- Test configuration parameters -- |
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25 ------------------------------------ |
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26 |
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27 File_Size : Stream_Element_Offset := 100_000; |
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28 |
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29 Continuous : constant Boolean := False; |
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30 -- If this constant is True, the test would be repeated again and again, |
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31 -- with increment File_Size for every iteration. |
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32 |
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33 Header : constant ZLib.Header_Type := ZLib.Default; |
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34 -- Do not use Header other than Default in ZLib versions 1.1.4 and older. |
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35 |
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36 Init_Random : constant := 8; |
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37 -- We are using the same random sequence, in case of we catch bug, |
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38 -- so we would be able to reproduce it. |
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39 |
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40 -- End -- |
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41 |
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42 Pack_Size : Stream_Element_Offset; |
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43 Offset : Stream_Element_Offset; |
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44 |
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45 Filter : ZLib.Filter_Type; |
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46 |
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47 subtype Visible_Symbols |
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48 is Stream_Element range 16#20# .. 16#7E#; |
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49 |
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50 package Random_Elements is new |
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51 Ada.Numerics.Discrete_Random (Visible_Symbols); |
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52 |
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53 Gen : Random_Elements.Generator; |
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54 Period : constant Stream_Element_Offset := 200; |
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55 -- Period constant variable for random generator not to be very random. |
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56 -- Bigger period, harder random. |
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57 |
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58 Read_Buffer : Stream_Element_Array (1 .. 2048); |
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59 Read_First : Stream_Element_Offset; |
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60 Read_Last : Stream_Element_Offset; |
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61 |
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62 procedure Reset; |
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63 |
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64 procedure Read |
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65 (Item : out Stream_Element_Array; |
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66 Last : out Stream_Element_Offset); |
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67 -- this procedure is for generic instantiation of |
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68 -- ZLib.Read |
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69 -- reading data from the File_In. |
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70 |
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71 procedure Read is new ZLib.Read |
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72 (Read, |
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73 Read_Buffer, |
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74 Rest_First => Read_First, |
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75 Rest_Last => Read_Last); |
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76 |
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77 ---------- |
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78 -- Read -- |
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79 ---------- |
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80 |
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81 procedure Read |
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82 (Item : out Stream_Element_Array; |
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83 Last : out Stream_Element_Offset) is |
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84 begin |
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85 Last := Stream_Element_Offset'Min |
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86 (Item'Last, |
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87 Item'First + File_Size - Offset); |
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88 |
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89 for J in Item'First .. Last loop |
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90 if J < Item'First + Period then |
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91 Item (J) := Random_Elements.Random (Gen); |
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92 else |
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93 Item (J) := Item (J - Period); |
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94 end if; |
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95 |
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96 Offset := Offset + 1; |
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97 end loop; |
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98 end Read; |
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99 |
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100 ----------- |
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101 -- Reset -- |
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102 ----------- |
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103 |
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104 procedure Reset is |
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105 begin |
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106 Random_Elements.Reset (Gen, Init_Random); |
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107 Pack_Size := 0; |
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108 Offset := 1; |
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109 Read_First := Read_Buffer'Last + 1; |
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110 Read_Last := Read_Buffer'Last; |
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111 end Reset; |
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112 |
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113 begin |
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114 Ada.Text_IO.Put_Line ("ZLib " & ZLib.Version); |
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115 |
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116 loop |
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117 for Level in ZLib.Compression_Level'Range loop |
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118 |
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119 Ada.Text_IO.Put ("Level =" |
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120 & ZLib.Compression_Level'Image (Level)); |
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121 |
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122 -- Deflate using generic instantiation. |
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123 |
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124 ZLib.Deflate_Init |
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125 (Filter, |
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126 Level, |
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127 Header => Header); |
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128 |
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129 Reset; |
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130 |
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131 Ada.Text_IO.Put |
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132 (Stream_Element_Offset'Image (File_Size) & " ->"); |
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133 |
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134 loop |
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135 declare |
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136 Buffer : Stream_Element_Array (1 .. 1024); |
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137 Last : Stream_Element_Offset; |
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138 begin |
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139 Read (Filter, Buffer, Last); |
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140 |
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141 Pack_Size := Pack_Size + Last - Buffer'First + 1; |
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142 |
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143 exit when Last < Buffer'Last; |
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144 end; |
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145 end loop; |
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146 |
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147 Ada.Text_IO.Put_Line (Stream_Element_Offset'Image (Pack_Size)); |
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148 |
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149 ZLib.Close (Filter); |
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150 end loop; |
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151 |
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152 exit when not Continuous; |
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153 |
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154 File_Size := File_Size + 1; |
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155 end loop; |
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156 end Read; |