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111
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1 -- CA11011.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 the parent unit 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 and objects
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32 -- used by the system. Declare a public child package that
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33 -- provides a visible interface to the system functionality.
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34 -- Declare a private grandchild package that uses the visible grandparent
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35 -- components to provide the actual functionality to the system.
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36 --
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37 -- The public child (parent of the private grandchild) uses the
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38 -- functionality of its private child (grandchild package) to provide
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39 -- the visible interface to operations of the system.
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40 --
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41 -- The test itself will utilize the visible interface provided in the
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42 -- public child package to demonstrate a possible solution to file
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43 -- management.
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44 --
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45 --
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46 -- CHANGE HISTORY:
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47 -- 06 Dec 94 SAIC ACVC 2.0
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48 --
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49 --!
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50
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51 package CA11011_0 is -- Package OS.
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52
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53 type File_Descriptor_Type is private;
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54
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55 Default_Descriptor : constant File_Descriptor_Type;
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56 First_File : constant File_Descriptor_Type;
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57
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58 procedure Verify_Initial_Conditions (Key : in File_Descriptor_Type;
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59 Status : out Boolean);
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60
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61 function Final_Conditions_Valid (Key : File_Descriptor_Type)
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62 return Boolean;
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63
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64
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65 private
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66
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67 type File_Descriptor_Type is new Integer;
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68 type File_Name_Type is new String (1 .. 11);
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69 type Permission_Type is (None, User, System);
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70 type File_Mode_Type is (Read_Only, Write_Only, Read_Write);
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71 type File_Status_Type is (Open, Closed);
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72
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73 Default_Descriptor : constant File_Descriptor_Type := 0;
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74 First_File : constant File_Descriptor_Type := 1;
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75 Default_Permission : constant Permission_Type := None;
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76 Default_Mode : constant File_Mode_Type := Read_Only;
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77 Default_Status : constant File_Status_Type := Closed;
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78 Default_Filename : constant File_Name_Type := " ";
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79
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80 Init_Permission : constant Permission_Type := User;
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81 Init_Mode : constant File_Mode_Type := Read_Write;
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82 Init_Status : constant File_Status_Type := Open;
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83 An_Ada_File_Name : constant File_Name_Type := "AdaFileName";
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84
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85 Max_Files : constant File_Descriptor_Type := 10;
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86
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87 type File_Type is tagged
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88 record
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89 Descriptor : File_Descriptor_Type := Default_Descriptor;
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90 Name : File_Name_Type := Default_Filename;
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91 Acct_Access : Permission_Type := Default_Permission;
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92 Mode : File_Mode_Type := Default_Mode;
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93 Current_Status : File_Status_Type := Default_Status;
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94 end record;
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95
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96 type File_Array_Type is array (1 .. Max_Files) of File_Type;
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97
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98 File_Table : File_Array_Type;
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99 File_Counter : Integer := 0;
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100
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101 --
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102
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103 function Get_File_Name return File_Name_Type;
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104
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105 end CA11011_0; -- Package OS.
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106
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107 --=================================================================--
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108
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109 package body CA11011_0 is -- Package body OS.
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110
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111 function Get_File_Name return File_Name_Type is
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112 begin
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113 return (An_Ada_File_Name);
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114 end Get_File_Name;
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115 ---------------------------------------------------------------------
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116 procedure Verify_Initial_Conditions (Key : in File_Descriptor_Type;
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117 Status : out Boolean) is
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118 begin
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119 Status := False;
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120 if (File_Table(Key).Descriptor = Default_Descriptor) and then
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121 (File_Table(Key).Name = Default_Filename) and then
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122 (File_Table(Key).Acct_Access = Default_Permission) and then
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123 (File_Table(Key).Mode = Default_Mode) and then
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124 (File_Table(Key).Current_Status = Default_Status)
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125 then
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126 Status := True;
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127 end if;
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128 end Verify_Initial_Conditions;
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129 ---------------------------------------------------------------------
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130 function Final_Conditions_Valid (Key : File_Descriptor_Type)
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131 return Boolean is
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132 begin
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133 if ((File_Table(Key).Descriptor = First_File) and then
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134 (File_Table(Key).Name = An_Ada_File_Name) and then
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135 (File_Table(Key).Acct_Access = Init_Permission) and then
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136 not ((File_Table(Key).Mode = Default_Mode) or else
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137 (File_Table(Key).Current_Status = Default_Status)))
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138 then
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139 return (True);
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140 else
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141 return (False);
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142 end if;
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143 end Final_Conditions_Valid;
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144
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145 end CA11011_0; -- Package body OS.
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146
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147 --=================================================================--
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148
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149 package CA11011_0.CA11011_1 is -- Package OS.File_Manager
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150
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151 procedure Create_File (File_Key : in File_Descriptor_Type);
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152
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153 end CA11011_0.CA11011_1; -- Package OS.File_Manager
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154
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155 --=================================================================--
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156
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157 -- The Subprogram that performs the actual file operations is contained in a
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158 -- private package so that it is not accessible to any client.
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159 -- Default parameters are used in most cases in the subprogram calls, since
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160 -- the caller does not have visibility to these private types.
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161
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162 -- Package OS.File_Manager.Internals
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163 private package CA11011_0.CA11011_1.CA11011_2 is
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164
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165 Private_File_Counter : Integer renames File_Counter; -- Grandparent
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166 -- object.
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167 procedure Create
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168 (Key : in File_Descriptor_Type;
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169 File_Name : in File_Name_Type := Get_File_Name; -- Grandparent
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170 -- prvt type,
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171 -- prvt functn.
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172 File_Mode : in File_Mode_Type := Init_Mode; -- Grandparent
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173 -- prvt type,
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174 -- prvt const.
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175 File_Access : in Permission_Type := Init_Permission; -- Grandparent
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176 -- prvt type,
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177 -- prvt const.
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178 File_Status : in File_Status_Type := Init_Status); -- Grandparent
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179 -- prvt type,
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180 -- prvt const.
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181
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182 end CA11011_0.CA11011_1.CA11011_2; -- Package OS.File_Manager.Internals
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183
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184 --=================================================================--
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185
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186 -- Package Body OS.File_Manager.Internals
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187 package body CA11011_0.CA11011_1.CA11011_2 is
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188
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189 procedure Create
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190 (Key : in File_Descriptor_Type;
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191 File_Name : in File_Name_Type := Get_File_Name;
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192 File_Mode : in File_Mode_Type := Init_Mode;
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193 File_Access : in Permission_Type := Init_Permission;
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194 File_Status : in File_Status_Type := Init_Status) is
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195 begin
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196 Private_File_Counter := Private_File_Counter + 1;
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197 File_Table(Key).Descriptor := Key; -- Grandparent object.
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198 File_Table(Key).Name := File_Name;
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199 File_Table(Key).Mode := File_Mode;
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200 File_Table(Key).Acct_Access := File_Access;
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201 File_Table(Key).Current_Status := File_Status;
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202 end Create;
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203
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204 end CA11011_0.CA11011_1.CA11011_2; -- Package body OS.File_Manager.Internals
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205
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206 --=================================================================--
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207
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208 with CA11011_0.CA11011_1.CA11011_2; -- with Child OS.File_Manager.Internals
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209
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210 package body CA11011_0.CA11011_1 is -- Package body OS.File_Manager
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211
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212 package Internal renames CA11011_0.CA11011_1.CA11011_2;
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213
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214 -- This subprogram utilizes a call to a subprogram contained in a private
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215 -- child to perform the actual processing.
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216
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217 procedure Create_File (File_Key : in File_Descriptor_Type) is
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218 begin
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219 Internal.Create (Key => File_Key); -- Other parameters are defaults,
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220 -- since they are of private types
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221 -- from the parent package.
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222 -- File_Descriptor_Type is private,
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223 -- but declared in visible part of
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224 -- parent spec.
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225 end Create_File;
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226
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227 end CA11011_0.CA11011_1; -- Package body OS.File_Manager
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228
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229 --=================================================================--
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230
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231 with CA11011_0.CA11011_1; -- with public Child Package OS.File_Manager
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232 with Report;
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233
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234 procedure CA11011 is
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235
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236 package OS renames CA11011_0;
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237 package File_Manager renames CA11011_0.CA11011_1;
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238
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239 Data_Base_File_Key : OS.File_Descriptor_Type := OS.First_File;
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240 TC_Status : Boolean := False;
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241
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242 begin
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243
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244 -- This test indicates one approach to file management operations.
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245 -- It is not intended to demonstrate full functionality, but rather
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246 -- that the use of a private child package can provide a solution
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247 -- to a typical user situation.
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248
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249 Report.Test ("CA11011", "Check that a private child package can use " &
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250 "entities declared in the private part of the " &
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251 "parent unit of its parent unit");
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252
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253 OS.Verify_Initial_Conditions (Data_Base_File_Key, TC_Status);
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254
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255 if not TC_Status then
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256 Report.Failed ("Initial condition failure");
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257 end if;
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258
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259 -- Perform file initializations.
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260
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261 File_Manager.Create_File (File_Key => Data_Base_File_Key);
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262
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263 TC_Status := OS.Final_Conditions_Valid (Data_Base_File_Key);
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264
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265 if not TC_Status then
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266 Report.Failed ("Bad status return from Create_File");
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267 end if;
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268
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269 Report.Result;
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270
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271 end CA11011;
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