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date Fri, 27 Oct 2017 22:46:09 +0900
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1 -- CXB30132.AM
2 --
3 -- Grant of Unlimited Rights
4 --
5 -- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
6 -- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
7 -- unlimited rights in the software and documentation contained herein.
8 -- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
9 -- this public release, the Government intends to confer upon all
10 -- recipients unlimited rights equal to those held by the Government.
11 -- These rights include rights to use, duplicate, release or disclose the
12 -- released technical data and computer software in whole or in part, in
13 -- any manner and for any purpose whatsoever, and to have or permit others
14 -- to do so.
15 --
16 -- DISCLAIMER
17 --
18 -- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
19 -- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
20 -- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
21 -- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
22 -- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
23 -- PARTICULAR PURPOSE OF SAID MATERIAL.
24 --*
25 --
26 -- OBJECTIVE:
27 -- Check that imported, user-defined C language functions can be
28 -- called from an Ada program.
29 --
30 -- TEST DESCRIPTION:
31 -- This test checks that user-defined C language functions can be
32 -- imported and referenced from an Ada program. Two C language
33 -- functions are specified in files CXB30130.C and CXB30131.C.
34 -- These two functions are imported to this test program, using two
35 -- calls to Pragma Import. Each function is then called in this test,
36 -- and the results of the call are verified.
37 --
38 -- This test assumes that the following characters are all included
39 -- in the implementation defined type Interfaces.C.char:
40 -- ' ', 'a'..'z', and 'A'..'Z'.
41 --
42 -- APPLICABILITY CRITERIA:
43 -- This test is applicable to all implementations that provide
44 -- packages Interfaces.C and Interfaces.C.Strings. If an
45 -- implementation provides packages Interfaces.C and
46 -- Interfaces.C.Strings, this test must compile, execute, and
47 -- report "PASSED".
48 --
49 -- SPECIAL REQUIREMENTS:
50 -- The files CXB30130.C and CXB30131.C must be compiled with a C
51 -- compiler. Implementation dialects of C may require alteration of
52 -- the C program syntax (see individual C files).
53 --
54 -- Note that the compiled C code must be bound with the compiled Ada
55 -- code to create an executable image. An implementation must provide
56 -- the necessary commands to accomplish this.
57 --
58 -- Note that the C code included in CXB30130.C and CXB30131.C conforms
59 -- to ANSI-C. Modifications to these files may be required for other
60 -- C compilers. An implementation must provide the necessary
61 -- modifications to satisfy the function requirements.
62 --
63 -- TEST FILES:
64 -- The following files comprise this test:
65 --
66 -- CXB30130.C
67 -- CXB30131.C
68 -- CXB30132.AM
69 --
70 --
71 -- CHANGE HISTORY:
72 -- 13 Oct 95 SAIC Initial prerelease version.
73 -- 13 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
74 -- 26 Oct 96 SAIC Incorporated reviewer comments.
75 --
76 --!
77
78 with Report;
79 with Impdef;
80 with Interfaces.C; -- N/A => ERROR
81 with Interfaces.C.Strings; -- N/A => ERROR
82
83 procedure CXB30132 is
84 begin
85
86 Report.Test ("CXB3013", "Check that user-defined C functions can " &
87 "be imported into an Ada program");
88
89 Test_Block:
90 declare
91
92 package IC renames Interfaces.C;
93 package ICS renames Interfaces.C.Strings;
94
95 use type IC.char_array;
96 use type IC.int;
97 use type IC.short;
98 use type IC.C_float;
99 use type IC.double;
100
101 type Short_Ptr is access all IC.short;
102 type Float_Ptr is access all IC.C_float;
103 type Double_Ptr is access all IC.double;
104 subtype Char_Array_Type is IC.char_array(0..20);
105
106 TC_Default_int : IC.int := 49;
107 TC_Default_short : IC.short := 3;
108 TC_Default_float : IC.C_float := 50.0;
109 TC_Default_double : IC.double := 1209.0;
110
111 An_Int_Value : IC.int := TC_Default_int;
112 A_Short_Value : aliased IC.short := TC_Default_short;
113 A_Float_Value : aliased IC.C_float := TC_Default_float;
114 A_Double_Value : aliased IC.double := TC_Default_double;
115
116 A_Short_Int_Pointer : Short_Ptr := A_Short_Value'access;
117 A_Float_Pointer : Float_Ptr := A_Float_Value'access;
118 A_Double_Pointer : Double_Ptr := A_Double_Value'access;
119
120 Char_Array_1 : Char_Array_Type;
121 Char_Array_2 : Char_Array_Type;
122 Char_Pointer : ICS.chars_ptr;
123
124 TC_Char_Array : constant Char_Array_Type :=
125 "Look before you leap" & IC.nul;
126 TC_Return_int : IC.int := 0;
127
128 -- The Square_It function returns the square of the value The_Int
129 -- through the function name, and returns the square of the other
130 -- parameters through the parameter list (the last three parameters
131 -- are access values).
132
133 function Square_It (The_Int : in IC.int;
134 The_Short : in Short_Ptr;
135 The_Float : in Float_Ptr;
136 The_Double : in Double_Ptr) return IC.int;
137
138 -- The Combine_Strings function returns the result of the catenation
139 -- of the two string parameters through the function name.
140
141 function Combine_Strings (First_Part : in IC.char_array;
142 Second_Part : in IC.char_array)
143 return ICS.chars_ptr;
144
145
146 -- Use the user-defined C function square_it as a completion to the
147 -- function specification above.
148
149 pragma Import (Convention => C,
150 Entity => Square_It,
151 External_Name => Impdef.CXB30130_External_Name);
152
153 -- Use the user-defined C function combine_two_strings as a completion
154 -- to the function specification above.
155
156 pragma Import (C, Combine_Strings, Impdef.CXB30131_External_Name);
157
158
159 begin
160
161 -- Check that the imported version of C function CXB30130 produces
162 -- the correct results.
163
164 TC_Return_int := Square_It (The_Int => An_Int_Value,
165 The_Short => A_Short_Int_Pointer,
166 The_Float => A_Float_Pointer,
167 The_Double => A_Double_Pointer);
168
169 -- Compare the results with the expected results. Note that in the
170 -- case of the three "pointer" parameters, the objects being pointed
171 -- to have been modified as a result of the function.
172
173 if TC_Return_int /= An_Int_Value * An_Int_Value or
174 A_Short_Int_Pointer.all /= TC_Default_short * TC_Default_Short or
175 A_Short_Value /= TC_Default_short * TC_Default_Short or
176 A_Float_Pointer.all /= TC_Default_float * TC_Default_float or
177 A_Float_Value /= TC_Default_float * TC_Default_float or
178 A_Double_Pointer.all /= TC_Default_double * TC_Default_double or
179 A_Double_Value /= TC_Default_double * TC_Default_double
180 then
181 Report.Failed("Incorrect results returned from function square_it");
182 end if;
183
184
185 -- Check that two char_array values are combined by the imported
186 -- C function CXB30131.
187
188 Char_Array_1(0..12) := "Look before " & IC.nul;
189 Char_Array_2(0..8) := "you leap" & IC.nul;
190
191 Char_Pointer := Combine_Strings (Char_Array_1, Char_Array_2);
192
193 if ICS.Value(Char_Pointer) /= TC_Char_Array then
194 Report.Failed("Incorrect value returned from imported function " &
195 "combine_two_strings");
196 end if;
197
198
199 exception
200 when others => Report.Failed ("Exception raised in Test_Block");
201 end Test_Block;
202
203 Report.Result;
204
205 end CXB30132;