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date Fri, 27 Oct 2017 22:46:09 +0900
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1 -- CXB3010.A
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 the Procedure Free resets the parameter Item to
28 -- Null_Ptr. Check that Free has no effect if Item is Null_Ptr.
29 --
30 -- Check that the version of Function Value with a chars_ptr parameter
31 -- returning a char_array result returns the prefix of an array of
32 -- chars.
33 --
34 -- Check that the version of Function Value with a chars_ptr parameter
35 -- and a size_t parameter returning a char_array result returns
36 -- the shorter of:
37 -- 1) the first size_t number of characters, or
38 -- 2) the characters up to and including the first nul.
39 --
40 -- Check that both of the above versions of Function Value propagate
41 -- Dereference_Error if the Item parameter is Null_Ptr.
42 --
43 -- TEST DESCRIPTION:
44 -- This test validates the Procedure Free and two versions of Function
45 -- Value. A variety of char_array and char_ptr values are provided as
46 -- input, and results are compared for both length and content.
47 --
48 -- This test assumes that the following characters are all included
49 -- in the implementation defined type Interfaces.C.char:
50 -- ' ', 'a'..'z', and 'A'..'Z'.
51 --
52 -- APPLICABILITY CRITERIA:
53 -- This test is applicable to all implementations that provide
54 -- package Interfaces.C.Strings. If an implementation provides
55 -- package Interfaces.C.Strings, this test must compile, execute,
56 -- and report "PASSED".
57 --
58 --
59 -- CHANGE HISTORY:
60 -- 27 Sep 95 SAIC Initial prerelease version.
61 -- 13 May 96 SAIC Incorporated reviewer comments for ACVC 2.1.
62 -- 26 Oct 96 SAIC Incorporated reviewer comments.
63 -- 01 DEC 97 EDS Replicate line 199 at line 256, to ensure that
64 -- TC_chars_ptr has a valid pointer.
65 -- 08 JUL 99 RLB Added a test case to check that Value raises
66 -- Constraint_Error when Length = 0. (From Technical
67 -- Corrigendum 1).
68 -- 25 JAN 01 RLB Repaired previous test case to avoid raising
69 -- Constraint_Error in test case code.
70 -- 26 JAN 01 RLB Added an Ident_Int to the test case to prevent
71 -- optimization.
72
73 --!
74
75 with Report;
76 with Interfaces.C.Strings; -- N/A => ERROR
77
78 procedure CXB3010 is
79 begin
80
81 Report.Test ("CXB3010", "Check that Procedure Free and versions of " &
82 "Function Value produce correct results");
83
84 Test_Block:
85 declare
86
87 package IC renames Interfaces.C;
88 package ICS renames Interfaces.C.Strings;
89
90 use type IC.char_array;
91 use type IC.size_t;
92 use type ICS.chars_ptr;
93 use type IC.char;
94
95 Null_Char_Array_Access : constant ICS.char_array_access := null;
96
97 TC_String_1 : constant String := "Nonul";
98 TC_String_2 : constant String := "AbCdE";
99 TC_Blank_String : constant String(1..5) := (others => ' ');
100
101 -- The initialization of the following char_array objects
102 -- includes the appending of a terminating nul char, in order to
103 -- prevent the erroneous execution of Function Value.
104
105 TC_char_array : IC.char_array :=
106 IC.To_C(TC_Blank_String, True);
107 TC_char_array_1 : constant IC.char_array :=
108 IC.To_C(TC_String_1, True);
109 TC_char_array_2 : constant IC.char_array :=
110 IC.To_C(TC_String_2, True);
111 TC_Blank_char_array : constant IC.char_array :=
112 IC.To_C(TC_Blank_String, True);
113
114 -- This chars_ptr is initialized via the use of New_Chars_Array to
115 -- avoid erroneous execution of procedure Free.
116 TC_chars_ptr : ICS.chars_ptr :=
117 ICS.New_Char_Array(TC_Blank_char_array);
118
119 begin
120
121 -- Check that the Procedure Free resets the parameter Item
122 -- to Null_Ptr.
123
124 if TC_chars_ptr = ICS.Null_Ptr then
125 Report.Failed("TC_chars_ptr is currently null; it should not be " &
126 "null since it was given default initialization");
127 end if;
128
129 ICS.Free(TC_chars_ptr);
130
131 if TC_chars_ptr /= ICS.Null_Ptr then
132 Report.Failed("TC_chars_ptr was not set to Null_Ptr by " &
133 "Procedure Free");
134 end if;
135
136 -- Check that Free has no effect if Item is Null_Ptr.
137
138 begin
139 TC_chars_ptr := ICS.Null_Ptr; -- Ensure pointer is null.
140 ICS.Free(TC_chars_ptr);
141 if TC_chars_ptr /= ICS.Null_Ptr then
142 Report.Failed("TC_chars_ptr was set to a non-Null_Ptr value " &
143 "by Procedure Free. It was provided as a null " &
144 "parameter to Free, and there should have been " &
145 "no effect from a call to Procedure Free");
146 end if;
147 exception
148 when others =>
149 Report.Failed("Unexpected exception raised by Procedure Free " &
150 "when parameter Item is Null_Ptr");
151 end;
152
153
154 -- Check that the version of Function Value with a chars_ptr parameter
155 -- that returns a char_array result returns an array of chars (up to
156 -- and including the first nul).
157
158 TC_chars_ptr := ICS.New_Char_Array(TC_char_array_1);
159 TC_char_array := ICS.Value(Item => TC_chars_ptr);
160
161 if TC_char_array /= TC_char_array_1 or
162 IC.To_Ada(TC_char_array, True) /= IC.To_Ada(TC_char_array_1)
163 then
164 Report.Failed("Incorrect result from Function Value - 1");
165 end if;
166
167 TC_chars_ptr := ICS.New_Char_Array(TC_char_array_2);
168 TC_char_array := ICS.Value(Item => TC_chars_ptr);
169
170 if TC_char_array /= TC_char_array_2 or
171 IC.To_Ada(TC_char_array, True) /= IC.To_Ada(TC_char_array_2)
172 then
173 Report.Failed("Incorrect result from Function Value - 2");
174 end if;
175
176 if ICS.Value(Item => ICS.New_String("A little longer string")) /=
177 IC.To_C("A little longer string")
178 then
179 Report.Failed("Incorrect result from Function Value - 3");
180 end if;
181
182
183 -- Check that the version of Function Value with a chars_ptr parameter
184 -- and a size_t parameter that returns a char_array result returns
185 -- the shorter of:
186 -- 1) the first size_t number of characters, or
187 -- 2) the characters up to and including the first nul.
188
189 -- Case 1: the first size_t number of characters (less than the
190 -- total length).
191
192 begin
193 TC_chars_ptr := ICS.New_Char_Array(TC_char_array_1);
194 TC_char_array(0..2) := ICS.Value(Item => TC_chars_ptr, Length => 3);
195
196 if TC_char_array(0..2) /= TC_char_array_1(0..2)
197 then
198 Report.Failed
199 ("Incorrect result from Function Value with Length " &
200 "parameter - 1");
201 end if;
202 exception
203 when others =>
204 Report.Failed("Exception raised during Case 1 evaluation");
205 end;
206
207 -- Case 2: the characters up to and including the first nul.
208
209 TC_chars_ptr := ICS.New_Char_Array(TC_char_array_2);
210
211 -- The length supplied as a parameter exceeds the total length of
212 -- TC_char_array_2. The result should be the entire TC_char_array_2
213 -- including the terminating nul.
214
215 TC_char_array := ICS.Value(Item => TC_chars_ptr, Length => 7);
216
217 if TC_char_array /= TC_char_array_2 or
218 IC.To_Ada(TC_char_array) /= IC.To_Ada(TC_char_array_2) or
219 not (IC.Is_Nul_Terminated(TC_char_array))
220 then
221 Report.Failed("Incorrect result from Function Value with Length " &
222 "parameter - 2");
223 end if;
224
225
226 -- Check that both of the above versions of Function Value propagate
227 -- Dereference_Error if the Item parameter is Null_Ptr.
228
229 declare
230
231 -- Declare a dummy function to demonstrate one way that a chars_ptr
232 -- variable could inadvertantly be set to Null_Ptr prior to a call
233 -- to Value (below).
234 function Freedom (Condition : Boolean := False;
235 Ptr : ICS.chars_ptr) return ICS.chars_ptr is
236 Pointer : ICS.chars_ptr := Ptr;
237 begin
238 if Condition then
239 ICS.Free(Pointer);
240 else
241 null; -- An activity that doesn't set the chars_ptr value to
242 -- Null_Ptr.
243 end if;
244 return Pointer;
245 end Freedom;
246
247 begin
248
249 begin
250 TC_char_array := ICS.Value(Item => Freedom(True, TC_chars_ptr));
251 Report.Failed
252 ("Function Value (without Length parameter) did not " &
253 "raise Dereference_Error when provided a null Item " &
254 "parameter input value");
255 if TC_char_array(0) = '6' then -- Defeat optimization.
256 Report.Comment("Should never be printed");
257 end if;
258 exception
259 when ICS.Dereference_Error => null; -- OK, expected exception.
260 when others =>
261 Report.Failed("Incorrect exception raised by Function Value " &
262 "with Item parameter, when the Item parameter " &
263 "is Null_Ptr");
264 end;
265
266 TC_chars_ptr := ICS.New_Char_Array(TC_char_array_2);
267 begin
268 TC_char_array := ICS.Value(Item => Freedom(True, TC_chars_ptr),
269 Length => 4);
270 Report.Failed
271 ("Function Value (with Length parameter) did not " &
272 "raise Dereference_Error when provided a null Item " &
273 "parameter input value");
274 if TC_char_array(0) = '6' then -- Defeat optimization.
275 Report.Comment("Should never be printed");
276 end if;
277 exception
278 when ICS.Dereference_Error => null; -- OK, expected exception.
279 when others =>
280 Report.Failed("Incorrect exception raised by Function Value " &
281 "with both Item and Length parameters, when " &
282 "the Item parameter is Null_Ptr");
283 end;
284 end;
285
286 -- Check that Function Value with two parameters propagates
287 -- Constraint_Error if Length is 0.
288
289 begin
290 TC_chars_ptr := ICS.New_Char_Array(TC_char_array_1);
291 declare
292 TC : IC.char_array := ICS.Value(Item => TC_chars_ptr, Length =>
293 IC.Size_T(Report.Ident_Int(0)));
294 begin
295 Report.Failed
296 ("Function Value (with Length parameter) did not " &
297 "raise Constraint_Error when Length = 0");
298 if TC'Length <= TC_char_array'Length then
299 TC_char_array(1..TC'Length) := TC; -- Block optimization of TC.
300 end if;
301 end;
302
303 Report.Failed
304 ("Function Value (with Length parameter) did not " &
305 "raise Constraint_Error when Length = 0");
306 exception
307 when Constraint_Error => null; -- OK, expected exception.
308 when others =>
309 Report.Failed("Incorrect exception raised by Function Value " &
310 "with both Item and Length parameters, when " &
311 "Length = 0");
312 end;
313
314 exception
315 when others => Report.Failed ("Exception raised in Test_Block");
316 end Test_Block;
317
318 Report.Result;
319
320 end CXB3010;