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111
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1 -- CA11010.A
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2 --
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3 -- Grant of Unlimited Rights
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4 --
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5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
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7 -- unlimited rights in the software and documentation contained herein.
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8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
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9 -- this public release, the Government intends to confer upon all
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10 -- recipients unlimited rights equal to those held by the Government.
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11 -- These rights include rights to use, duplicate, release or disclose the
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12 -- released technical data and computer software in whole or in part, in
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13 -- any manner and for any purpose whatsoever, and to have or permit others
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14 -- to do so.
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15 --
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16 -- DISCLAIMER
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17 --
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18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
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19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
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20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
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24 --*
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25 --
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26 -- OBJECTIVE:
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27 -- Check that a private child package can use entities declared in the
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28 -- private part of its parent unit.
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29 --
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30 -- TEST DESCRIPTION:
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31 -- Declare a parent package containing private types, objects,
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32 -- and functions used by the system. Declare a private child package that
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33 -- uses the parent components to provide functionality to the system.
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34 --
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35 -- Declare an array of files with default values for all
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36 -- component fields of the files (records). Check the initial state of
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37 -- a specified file for proper default values. Perform the file "creation"
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38 -- (initialization), which will modify the fields of the record object.
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39 -- Again verify the file object to determine whether the fields have been
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40 -- reset properly.
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41 --
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42 --
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43 -- CHANGE HISTORY:
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44 -- 06 Dec 94 SAIC ACVC 2.0
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45 --
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46
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47 package CA11010_0 is -- Package OS.
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48
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49 type File_Descriptor_Type is private;
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50
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51 Default_Descriptor : constant File_Descriptor_Type;
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52
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53 function Initialize_File return File_Descriptor_Type;
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54 procedure Verify_Initial_Conditions (Status : out Boolean);
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55 function Final_Conditions_Valid return Boolean;
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56
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57 private
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58
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59 type File_Descriptor_Type is new Integer;
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60 type File_Name_Type is new String (1 .. 11);
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61 type Permission_Type is (None, User, System);
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62 type File_Mode_Type is (Read_Only, Write_Only, Read_Write);
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63 type File_Status_Type is (Open, Closed);
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64
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65 Default_Descriptor : constant File_Descriptor_Type := 0;
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66 Default_Permission : constant Permission_Type := None;
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67 Default_Mode : constant File_Mode_Type := Read_Only;
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68 Default_Status : constant File_Status_Type := Closed;
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69 Default_Filename : constant File_Name_Type := " ";
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70 An_Ada_File_Name : constant File_Name_Type := "AdaFileName";
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71 Max_Files : constant File_Descriptor_Type := 100;
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72
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73 type File_Type is tagged
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74 record
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75 Descriptor : File_Descriptor_Type := Default_Descriptor;
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76 Name : File_Name_Type := Default_Filename;
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77 Acct_Access : Permission_Type := Default_Permission;
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78 Mode : File_Mode_Type := Default_Mode;
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79 Current_Status : File_Status_Type := Default_Status;
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80 end record;
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81
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82 type File_Array_Type is array (1 .. Max_Files) of File_Type;
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83
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84 File_Table : File_Array_Type;
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85 File_Counter : Integer := 0;
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86
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87 --
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88
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89 function Get_File_Name return File_Name_Type;
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90
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91 end CA11010_0; -- Package OS.
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92
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93 --=================================================================--
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94
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95 -- Subprograms that perform the actual file operations are contained in a
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96 -- private package so that they are not accessible to any client.
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97
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98 private package CA11010_0.CA11010_1 is -- Package OS.Internals
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99
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100 Private_File_Counter : Integer renames File_Counter; -- Parent priv. object.
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101
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102 function Initialize
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103 (File_Name : File_Name_Type := Get_File_Name; -- Parent priv. function.
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104 File_Mode : File_Mode_Type := Read_Write) -- Parent priv. literal.
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105 return File_Descriptor_Type; -- Parent type.
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106
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107 end CA11010_0.CA11010_1; -- Package OS.Internals
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108
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109 --=================================================================--
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110
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111 package body CA11010_0.CA11010_1 is -- Package body OS.Internals
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112
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113 function Next_Available_File return File_Descriptor_Type is
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114 begin
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115 Private_File_Counter := Private_File_Counter + 1;
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116 return (File_Descriptor_Type(File_Counter));
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117 end Next_Available_File;
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118 ----------------------------------------------------------------
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119 function Initialize
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120 (File_Name : File_Name_Type := Get_File_Name; -- Parent priv. function
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121 File_Mode : File_Mode_Type := Read_Write) -- Parent priv. literal
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122 return File_Descriptor_Type is -- Parent type
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123 Number : File_Descriptor_Type;
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124 begin
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125 Number := Next_Available_File;
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126 File_Table(Number).Descriptor := Number; -- Parent priv. object
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127 File_Table(Number).Name := File_Name; -- Default parameter value
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128 File_Table(Number).Mode := File_Mode; -- Default parameter value
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129 File_Table(Number).Acct_Access := User;
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130 File_Table(Number).Current_Status := Open;
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131 return (Number);
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132 end Initialize;
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133
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134 end CA11010_0.CA11010_1; -- Package body OS.Internals
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135
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136 --=================================================================--
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137
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138 with CA11010_0.CA11010_1; -- Private child package "withed" by
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139 -- parent body.
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140
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141 package body CA11010_0 is -- Package body OS
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142
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143 function Get_File_Name return File_Name_Type is
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144 begin
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145 return (An_Ada_File_Name); -- If this was a real function, the user
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146 end Get_File_Name; -- would be asked to input a name, or there
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147 -- would be some type of similar processing.
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148
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149 -- This subprogram utilizes a call to a subprogram contained in a private
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150 -- child to perform the actual processing.
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151
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152 function Initialize_File return File_Descriptor_Type is
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153 begin
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154 return (CA11010_0.CA11010_1.Initialize); -- No parameters are needed,
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155 -- since defaults have been
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156 -- provided.
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157 end Initialize_File;
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158
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159 --
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160 -- Separate subunits.
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161 --
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162
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163 procedure Verify_Initial_Conditions (Status : out Boolean) is separate;
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164
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165 function Final_Conditions_Valid return Boolean is separate;
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166
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167 end CA11010_0; -- Package body OS
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168
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169 --=================================================================--
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170
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171 separate (CA11010_0)
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172 procedure Verify_Initial_Conditions (Status : out Boolean) is
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173 begin
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174 Status := False;
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175 if (File_Table(1).Descriptor = Default_Descriptor) and then
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176 (File_Table(1).Name = Default_Filename) and then
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177 (File_Table(1).Acct_Access = Default_Permission) and then
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178 (File_Table(1).Mode = Default_Mode) and then
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179 (File_Table(1).Current_Status = Default_Status)
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180 then
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181 Status := True;
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182 end if;
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183 end Verify_Initial_Conditions;
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184
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185 --=================================================================--
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186
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187 separate (CA11010_0)
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188 function Final_Conditions_Valid return Boolean is
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189 begin
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190 if ((File_Table(1).Descriptor /= Default_Descriptor) and then
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191 (File_Table(1).Name = An_Ada_File_Name) and then
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192 (File_Table(1).Acct_Access = User) and then
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193 not ((File_Table(1).Mode = Default_Mode) or else
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194 (File_Table(1).Current_Status = Default_Status)))
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195 then
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196 return (True);
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197 else
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198 return (False);
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199 end if;
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200 end Final_Conditions_Valid;
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201
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202 --=================================================================--
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203
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204 with CA11010_0; -- with Package OS.
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205 with Report;
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206
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207 procedure CA11010 is
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208
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209 package OS renames CA11010_0;
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210
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211 Ada_File_Key : OS.File_Descriptor_Type := OS.Default_Descriptor;
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212 Initialization_Status : Boolean := False;
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213
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214 begin
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215
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216 -- This test indicates one approach to a file management operation.
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217 -- It is not intended to demonstrate full functionality, but rather
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218 -- that the use of a private child package can provide a solution
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219 -- to a user situation, that being the implementation of certain functions
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220 -- being provided in a child package, with the parent package body
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221 -- utilizing these implementations.
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222
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223 Report.Test ("CA11010", "Check that a private child package can use " &
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224 "entities declared in the private part of its " &
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225 "parent unit");
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226
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227 -- Check initial conditions of the first entry in the file table.
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228 -- These are all default values provided in the declaration of the
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229 -- type File_Type.
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230
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231 OS.Verify_Initial_Conditions (Initialization_Status);
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232
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233 if not Initialization_Status then
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234 Report.Failed ("Initial condition failure");
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235 end if;
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236
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237 -- Call the initialization function. This will result in the resetting
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238 -- of the fields associated with the first entry in the File_Table (this
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239 -- is the first/only call of Initialize_File).
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240 -- No parameters are necessary for this call, due to the default values
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241 -- provided in the private child package routine Initialize.
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242
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243 Ada_File_Key := OS.Initialize_File;
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244
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245 -- Verify that the initial conditions of the file table component have
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246 -- been properly modified by the initialization function.
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247
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248 if not OS.Final_Conditions_Valid then
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249 Report.Failed ("Initialization processing failure");
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250 end if;
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251
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252 Report.Result;
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253
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254 end CA11010;
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