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 | -- $Id$ |
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10 | |
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11 | -- The program has a few aims. |
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12 | -- 1. Test ZLib.Ada95 thick binding functionality. |
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13 | -- 2. Show the example of use main functionality of the ZLib.Ada95 binding. |
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14 | -- 3. Build this program automatically compile all ZLib.Ada95 packages under |
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15 | -- GNAT Ada95 compiler. |
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16 | |
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17 | with ZLib.Streams; |
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18 | with Ada.Streams.Stream_IO; |
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19 | with Ada.Numerics.Discrete_Random; |
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20 | |
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21 | with Ada.Text_IO; |
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22 | |
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23 | with Ada.Calendar; |
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24 | |
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25 | procedure Test is |
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26 | |
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27 | use Ada.Streams; |
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28 | use Stream_IO; |
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29 | |
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30 | ------------------------------------ |
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31 | -- Test configuration parameters -- |
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32 | ------------------------------------ |
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33 | |
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34 | File_Size : Count := 100_000; |
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35 | Continuous : constant Boolean := False; |
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36 | |
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37 | Header : constant ZLib.Header_Type := ZLib.Default; |
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38 | -- ZLib.None; |
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39 | -- ZLib.Auto; |
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40 | -- ZLib.GZip; |
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41 | -- Do not use Header other then Default in ZLib versions 1.1.4 |
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42 | -- and older. |
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43 | |
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44 | Strategy : constant ZLib.Strategy_Type := ZLib.Default_Strategy; |
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45 | Init_Random : constant := 10; |
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46 | |
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47 | -- End -- |
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48 | |
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49 | In_File_Name : constant String := "testzlib.in"; |
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50 | -- Name of the input file |
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51 | |
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52 | Z_File_Name : constant String := "testzlib.zlb"; |
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53 | -- Name of the compressed file. |
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54 | |
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55 | Out_File_Name : constant String := "testzlib.out"; |
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56 | -- Name of the decompressed file. |
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57 | |
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58 | File_In : File_Type; |
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59 | File_Out : File_Type; |
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60 | File_Back : File_Type; |
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61 | File_Z : ZLib.Streams.Stream_Type; |
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62 | |
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63 | Filter : ZLib.Filter_Type; |
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64 | |
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65 | Time_Stamp : Ada.Calendar.Time; |
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66 | |
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67 | procedure Generate_File; |
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68 | -- Generate file of spetsified size with some random data. |
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69 | -- The random data is repeatable, for the good compression. |
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70 | |
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71 | procedure Compare_Streams |
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72 | (Left, Right : in out Root_Stream_Type'Class); |
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73 | -- The procedure compearing data in 2 streams. |
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74 | -- It is for compare data before and after compression/decompression. |
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75 | |
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76 | procedure Compare_Files (Left, Right : String); |
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77 | -- Compare files. Based on the Compare_Streams. |
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78 | |
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79 | procedure Copy_Streams |
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80 | (Source, Target : in out Root_Stream_Type'Class; |
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81 | Buffer_Size : in Stream_Element_Offset := 1024); |
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82 | -- Copying data from one stream to another. It is for test stream |
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83 | -- interface of the library. |
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84 | |
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85 | procedure Data_In |
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86 | (Item : out Stream_Element_Array; |
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87 | Last : out Stream_Element_Offset); |
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88 | -- this procedure is for generic instantiation of |
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89 | -- ZLib.Generic_Translate. |
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90 | -- reading data from the File_In. |
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91 | |
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92 | procedure Data_Out (Item : in Stream_Element_Array); |
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93 | -- this procedure is for generic instantiation of |
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94 | -- ZLib.Generic_Translate. |
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95 | -- writing data to the File_Out. |
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96 | |
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97 | procedure Stamp; |
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98 | -- Store the timestamp to the local variable. |
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99 | |
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100 | procedure Print_Statistic (Msg : String; Data_Size : ZLib.Count); |
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101 | -- Print the time statistic with the message. |
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102 | |
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103 | procedure Translate is new ZLib.Generic_Translate |
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104 | (Data_In => Data_In, |
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105 | Data_Out => Data_Out); |
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106 | -- This procedure is moving data from File_In to File_Out |
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107 | -- with compression or decompression, depend on initialization of |
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108 | -- Filter parameter. |
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109 | |
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110 | ------------------- |
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111 | -- Compare_Files -- |
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112 | ------------------- |
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113 | |
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114 | procedure Compare_Files (Left, Right : String) is |
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115 | Left_File, Right_File : File_Type; |
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116 | begin |
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117 | Open (Left_File, In_File, Left); |
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118 | Open (Right_File, In_File, Right); |
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119 | Compare_Streams (Stream (Left_File).all, Stream (Right_File).all); |
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120 | Close (Left_File); |
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121 | Close (Right_File); |
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122 | end Compare_Files; |
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123 | |
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124 | --------------------- |
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125 | -- Compare_Streams -- |
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126 | --------------------- |
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127 | |
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128 | procedure Compare_Streams |
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129 | (Left, Right : in out Ada.Streams.Root_Stream_Type'Class) |
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130 | is |
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131 | Left_Buffer, Right_Buffer : Stream_Element_Array (0 .. 16#FFF#); |
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132 | Left_Last, Right_Last : Stream_Element_Offset; |
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133 | begin |
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134 | loop |
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135 | Read (Left, Left_Buffer, Left_Last); |
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136 | Read (Right, Right_Buffer, Right_Last); |
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137 | |
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138 | if Left_Last /= Right_Last then |
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139 | Ada.Text_IO.Put_Line ("Compare error :" |
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140 | & Stream_Element_Offset'Image (Left_Last) |
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141 | & " /= " |
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142 | & Stream_Element_Offset'Image (Right_Last)); |
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143 | |
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144 | raise Constraint_Error; |
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145 | |
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146 | elsif Left_Buffer (0 .. Left_Last) |
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147 | /= Right_Buffer (0 .. Right_Last) |
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148 | then |
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149 | Ada.Text_IO.Put_Line ("ERROR: IN and OUT files is not equal."); |
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150 | raise Constraint_Error; |
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151 | |
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152 | end if; |
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153 | |
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154 | exit when Left_Last < Left_Buffer'Last; |
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155 | end loop; |
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156 | end Compare_Streams; |
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157 | |
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158 | ------------------ |
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159 | -- Copy_Streams -- |
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160 | ------------------ |
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161 | |
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162 | procedure Copy_Streams |
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163 | (Source, Target : in out Ada.Streams.Root_Stream_Type'Class; |
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164 | Buffer_Size : in Stream_Element_Offset := 1024) |
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165 | is |
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166 | Buffer : Stream_Element_Array (1 .. Buffer_Size); |
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167 | Last : Stream_Element_Offset; |
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168 | begin |
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169 | loop |
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170 | Read (Source, Buffer, Last); |
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171 | Write (Target, Buffer (1 .. Last)); |
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172 | |
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173 | exit when Last < Buffer'Last; |
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174 | end loop; |
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175 | end Copy_Streams; |
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176 | |
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177 | ------------- |
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178 | -- Data_In -- |
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179 | ------------- |
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180 | |
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181 | procedure Data_In |
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182 | (Item : out Stream_Element_Array; |
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183 | Last : out Stream_Element_Offset) is |
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184 | begin |
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185 | Read (File_In, Item, Last); |
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186 | end Data_In; |
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187 | |
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188 | -------------- |
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189 | -- Data_Out -- |
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190 | -------------- |
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191 | |
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192 | procedure Data_Out (Item : in Stream_Element_Array) is |
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193 | begin |
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194 | Write (File_Out, Item); |
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195 | end Data_Out; |
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196 | |
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197 | ------------------- |
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198 | -- Generate_File -- |
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199 | ------------------- |
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200 | |
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201 | procedure Generate_File is |
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202 | subtype Visible_Symbols is Stream_Element range 16#20# .. 16#7E#; |
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203 | |
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204 | package Random_Elements is |
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205 | new Ada.Numerics.Discrete_Random (Visible_Symbols); |
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206 | |
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207 | Gen : Random_Elements.Generator; |
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208 | Buffer : Stream_Element_Array := (1 .. 77 => 16#20#) & 10; |
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209 | |
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210 | Buffer_Count : constant Count := File_Size / Buffer'Length; |
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211 | -- Number of same buffers in the packet. |
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212 | |
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213 | Density : constant Count := 30; -- from 0 to Buffer'Length - 2; |
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214 | |
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215 | procedure Fill_Buffer (J, D : in Count); |
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216 | -- Change the part of the buffer. |
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217 | |
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218 | ----------------- |
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219 | -- Fill_Buffer -- |
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220 | ----------------- |
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221 | |
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222 | procedure Fill_Buffer (J, D : in Count) is |
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223 | begin |
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224 | for K in 0 .. D loop |
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225 | Buffer |
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226 | (Stream_Element_Offset ((J + K) mod (Buffer'Length - 1) + 1)) |
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227 | := Random_Elements.Random (Gen); |
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228 | |
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229 | end loop; |
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230 | end Fill_Buffer; |
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231 | |
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232 | begin |
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233 | Random_Elements.Reset (Gen, Init_Random); |
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234 | |
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235 | Create (File_In, Out_File, In_File_Name); |
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236 | |
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237 | Fill_Buffer (1, Buffer'Length - 2); |
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238 | |
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239 | for J in 1 .. Buffer_Count loop |
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240 | Write (File_In, Buffer); |
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241 | |
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242 | Fill_Buffer (J, Density); |
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243 | end loop; |
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244 | |
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245 | -- fill remain size. |
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246 | |
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247 | Write |
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248 | (File_In, |
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249 | Buffer |
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250 | (1 .. Stream_Element_Offset |
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251 | (File_Size - Buffer'Length * Buffer_Count))); |
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252 | |
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253 | Flush (File_In); |
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254 | Close (File_In); |
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255 | end Generate_File; |
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256 | |
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257 | --------------------- |
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258 | -- Print_Statistic -- |
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259 | --------------------- |
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260 | |
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261 | procedure Print_Statistic (Msg : String; Data_Size : ZLib.Count) is |
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262 | use Ada.Calendar; |
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263 | use Ada.Text_IO; |
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264 | |
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265 | package Count_IO is new Integer_IO (ZLib.Count); |
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266 | |
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267 | Curr_Dur : Duration := Clock - Time_Stamp; |
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268 | begin |
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269 | Put (Msg); |
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270 | |
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271 | Set_Col (20); |
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272 | Ada.Text_IO.Put ("size ="); |
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273 | |
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274 | Count_IO.Put |
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275 | (Data_Size, |
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276 | Width => Stream_IO.Count'Image (File_Size)'Length); |
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277 | |
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278 | Put_Line (" duration =" & Duration'Image (Curr_Dur)); |
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279 | end Print_Statistic; |
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280 | |
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281 | ----------- |
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282 | -- Stamp -- |
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283 | ----------- |
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284 | |
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285 | procedure Stamp is |
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286 | begin |
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287 | Time_Stamp := Ada.Calendar.Clock; |
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288 | end Stamp; |
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289 | |
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290 | begin |
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291 | Ada.Text_IO.Put_Line ("ZLib " & ZLib.Version); |
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292 | |
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293 | loop |
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294 | Generate_File; |
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295 | |
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296 | for Level in ZLib.Compression_Level'Range loop |
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297 | |
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298 | Ada.Text_IO.Put_Line ("Level =" |
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299 | & ZLib.Compression_Level'Image (Level)); |
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300 | |
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301 | -- Test generic interface. |
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302 | Open (File_In, In_File, In_File_Name); |
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303 | Create (File_Out, Out_File, Z_File_Name); |
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304 | |
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305 | Stamp; |
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306 | |
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307 | -- Deflate using generic instantiation. |
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308 | |
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309 | ZLib.Deflate_Init |
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310 | (Filter => Filter, |
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311 | Level => Level, |
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312 | Strategy => Strategy, |
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313 | Header => Header); |
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314 | |
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315 | Translate (Filter); |
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316 | Print_Statistic ("Generic compress", ZLib.Total_Out (Filter)); |
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317 | ZLib.Close (Filter); |
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318 | |
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319 | Close (File_In); |
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320 | Close (File_Out); |
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321 | |
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322 | Open (File_In, In_File, Z_File_Name); |
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323 | Create (File_Out, Out_File, Out_File_Name); |
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324 | |
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325 | Stamp; |
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326 | |
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327 | -- Inflate using generic instantiation. |
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328 | |
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329 | ZLib.Inflate_Init (Filter, Header => Header); |
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330 | |
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331 | Translate (Filter); |
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332 | Print_Statistic ("Generic decompress", ZLib.Total_Out (Filter)); |
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333 | |
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334 | ZLib.Close (Filter); |
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335 | |
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336 | Close (File_In); |
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337 | Close (File_Out); |
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338 | |
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339 | Compare_Files (In_File_Name, Out_File_Name); |
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340 | |
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341 | -- Test stream interface. |
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342 | |
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343 | -- Compress to the back stream. |
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344 | |
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345 | Open (File_In, In_File, In_File_Name); |
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346 | Create (File_Back, Out_File, Z_File_Name); |
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347 | |
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348 | Stamp; |
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349 | |
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350 | ZLib.Streams.Create |
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351 | (Stream => File_Z, |
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352 | Mode => ZLib.Streams.Out_Stream, |
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353 | Back => ZLib.Streams.Stream_Access |
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354 | (Stream (File_Back)), |
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355 | Back_Compressed => True, |
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356 | Level => Level, |
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357 | Strategy => Strategy, |
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358 | Header => Header); |
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359 | |
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360 | Copy_Streams |
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361 | (Source => Stream (File_In).all, |
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362 | Target => File_Z); |
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363 | |
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364 | -- Flushing internal buffers to the back stream. |
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365 | |
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366 | ZLib.Streams.Flush (File_Z, ZLib.Finish); |
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367 | |
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368 | Print_Statistic ("Write compress", |
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369 | ZLib.Streams.Write_Total_Out (File_Z)); |
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370 | |
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371 | ZLib.Streams.Close (File_Z); |
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372 | |
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373 | Close (File_In); |
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374 | Close (File_Back); |
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375 | |
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376 | -- Compare reading from original file and from |
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377 | -- decompression stream. |
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378 | |
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379 | Open (File_In, In_File, In_File_Name); |
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380 | Open (File_Back, In_File, Z_File_Name); |
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381 | |
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382 | ZLib.Streams.Create |
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383 | (Stream => File_Z, |
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384 | Mode => ZLib.Streams.In_Stream, |
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385 | Back => ZLib.Streams.Stream_Access |
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386 | (Stream (File_Back)), |
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387 | Back_Compressed => True, |
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388 | Header => Header); |
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389 | |
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390 | Stamp; |
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391 | Compare_Streams (Stream (File_In).all, File_Z); |
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392 | |
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393 | Print_Statistic ("Read decompress", |
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394 | ZLib.Streams.Read_Total_Out (File_Z)); |
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395 | |
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396 | ZLib.Streams.Close (File_Z); |
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397 | Close (File_In); |
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398 | Close (File_Back); |
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399 | |
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400 | -- Compress by reading from compression stream. |
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401 | |
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402 | Open (File_Back, In_File, In_File_Name); |
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403 | Create (File_Out, Out_File, Z_File_Name); |
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404 | |
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405 | ZLib.Streams.Create |
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406 | (Stream => File_Z, |
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407 | Mode => ZLib.Streams.In_Stream, |
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408 | Back => ZLib.Streams.Stream_Access |
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409 | (Stream (File_Back)), |
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410 | Back_Compressed => False, |
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411 | Level => Level, |
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412 | Strategy => Strategy, |
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413 | Header => Header); |
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414 | |
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415 | Stamp; |
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416 | Copy_Streams |
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417 | (Source => File_Z, |
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418 | Target => Stream (File_Out).all); |
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419 | |
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420 | Print_Statistic ("Read compress", |
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421 | ZLib.Streams.Read_Total_Out (File_Z)); |
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422 | |
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423 | ZLib.Streams.Close (File_Z); |
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424 | |
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425 | Close (File_Out); |
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426 | Close (File_Back); |
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427 | |
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428 | -- Decompress to decompression stream. |
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429 | |
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430 | Open (File_In, In_File, Z_File_Name); |
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431 | Create (File_Back, Out_File, Out_File_Name); |
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432 | |
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433 | ZLib.Streams.Create |
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434 | (Stream => File_Z, |
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435 | Mode => ZLib.Streams.Out_Stream, |
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436 | Back => ZLib.Streams.Stream_Access |
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437 | (Stream (File_Back)), |
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438 | Back_Compressed => False, |
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439 | Header => Header); |
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440 | |
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441 | Stamp; |
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442 | |
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443 | Copy_Streams |
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444 | (Source => Stream (File_In).all, |
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445 | Target => File_Z); |
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446 | |
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447 | Print_Statistic ("Write decompress", |
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448 | ZLib.Streams.Write_Total_Out (File_Z)); |
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449 | |
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450 | ZLib.Streams.Close (File_Z); |
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451 | Close (File_In); |
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452 | Close (File_Back); |
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453 | |
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454 | Compare_Files (In_File_Name, Out_File_Name); |
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455 | end loop; |
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456 | |
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457 | Ada.Text_IO.Put_Line (Count'Image (File_Size) & " Ok."); |
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458 | |
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459 | exit when not Continuous; |
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460 | |
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461 | File_Size := File_Size + 1; |
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462 | end loop; |
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463 | end Test; |
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