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1 294 jeremybenn
-- CXAA017.A
2
--
3
--                             Grant of Unlimited Rights
4
--
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--     Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
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--     F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
7
--     unlimited rights in the software and documentation contained herein.
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--     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
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--     DISCLOSED ARE AS IS.  THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
20
--     WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
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--     SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
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--     OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
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--     PARTICULAR PURPOSE OF SAID MATERIAL.
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--*
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--
26
-- OBJECTIVE:
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--      Check that Ada.Text_IO function Look_Ahead sets parameter End_Of_Line
28
--      to True if at the end of a line; otherwise check that it returns the
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--      next character from a file (without consuming it), while setting
30
--      End_Of_Line to False.
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--
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--      Check that Ada.Text_IO function Get_Immediate will return the next
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--      control or graphic character in parameter Item from the specified
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--      file.  Check that the version of Ada.Text_IO function Get_Immediate
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--      with the Available parameter will, if a character is available in the
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--      specified file, return the character in parameter Item, and set
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--      parameter Available to True.
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--
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-- TEST DESCRIPTION:
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--      This test exercises specific capabilities of two Text_IO subprograms,
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--      Look_Ahead and Get_Immediate.  A file is prepared that contains a
42
--      variety of graphic and control characters on several lines.
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--      In processing this file, a call to Look_Ahead is performed to ensure
44
--      that characters are available, then individual characters are
45
--      extracted from the current line using Get_Immediate.  The characters
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--      returned from both subprogram calls are compared with the expected
47
--      character result.  Processing on each file line continues until
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--      Look_Ahead indicates that the end of the line is next.  Separate
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--      verification is performed to ensure that all characters of each line
50
--      are processed, and that the Available and End_Of_Line parameters
51
--      of the subprograms are properly set in the appropriate instances.
52
--
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-- APPLICABILITY CRITERIA:
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--      This test is applicable to implementations capable of supporting
55
--      external Text_IO files.
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--
57
--
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-- CHANGE HISTORY:
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--      30 May 95   SAIC    Initial prerelease version.
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--      01 May 96   SAIC    Incorporated reviewer comments for ACVC 2.1.
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--      26 Feb 97   PWB.CTA Allowed for non-support of some IO operations.
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--!
63
 
64
with Ada.Text_IO;
65
package CXAA017_0 is
66
 
67
   User_Defined_Input_File : aliased Ada.Text_IO.File_Type;
68
 
69
end CXAA017_0;
70
 
71
 
72
with CXAA017_0; use CXAA017_0;
73
with Ada.Characters.Latin_1;
74
with Ada.Exceptions;
75
with Ada.Text_IO;
76
with Report;
77
 
78
procedure CXAA017 is
79
 
80
   use Ada.Characters.Latin_1;
81
   use Ada.Exceptions;
82
   use Ada.Text_IO;
83
 
84
   Non_Applicable_System : exception;
85
   No_Reset            : exception;
86
 
87
begin
88
 
89
   Report.Test ("CXAA017", "Check that Ada.Text_IO subprograms "         &
90
                           "Look_Ahead and Get_Immediate are available " &
91
                           "and produce correct results");
92
 
93
   Test_Block:
94
   declare
95
 
96
      User_Input_Ptr    : File_Access := User_Defined_Input_File'Access;
97
 
98
      UDLA_Char,          -- Acronym UDLA => "User Defined Look Ahead"
99
      UDGI_Char,          -- Acronym UDGI => "User Defined Get Immediate"
100
      TC_Char           : Character := Ada.Characters.Latin_1.NUL;
101
 
102
      UDLA_End_Of_Line,
103
      UDGI_Available    : Boolean   := False;
104
 
105
      Char_Pos          : Natural;
106
 
107
      -- This string contains five ISO 646 Control characters and six ISO 646
108
      -- Graphic characters:
109
      TC_String_1  : constant String := STX       &
110
                                        SI        &
111
                                        DC2       &
112
                                        CAN       &
113
                                        US        &
114
                                        Space     &
115
                                        Ampersand &
116
                                        Solidus   &
117
                                        'A'       &
118
                                        LC_X      &
119
                                        DEL;
120
 
121
      -- This string contains two ISO 6429 Control and six ISO 6429 Graphic
122
      -- characters:
123
      TC_String_2  : constant String := IS4                         &
124
                                        SCI                         &
125
                                        Yen_Sign                    &
126
                                        Masculine_Ordinal_Indicator &
127
                                        UC_I_Grave                  &
128
                                        Multiplication_Sign         &
129
                                        LC_C_Cedilla                &
130
                                        LC_Icelandic_Thorn;
131
 
132
      TC_Number_Of_Strings : constant := 2;
133
 
134
      type String_Access_Type    is access constant String;
135
      type String_Ptr_Array_Type is
136
        array (1..TC_Number_Of_Strings) of String_Access_Type;
137
 
138
      TC_String_Ptr_Array : String_Ptr_Array_Type :=
139
                              (new String'(TC_String_1),
140
                               new String'(TC_String_2));
141
 
142
 
143
 
144
      procedure Create_New_File (The_File : in out File_Type;
145
                                 Mode     : in     File_Mode;
146
                                 Next     : in     Integer) is
147
      begin
148
         Create (The_File, Mode, Report.Legal_File_Name(Next));
149
      exception
150
         -- The following two exceptions can be raised if a system is not
151
         -- capable of supporting external Text_IO files.  The handler will
152
         -- raise a user-defined exception which will result in a
153
         -- Not_Applicable result for the test.
154
         when Use_Error | Name_Error => raise Non_Applicable_System;
155
      end Create_New_File;
156
 
157
 
158
 
159
      procedure Load_File (The_File : in out File_Type) is
160
      -- This procedure will load several strings into the file denoted
161
      -- by the input parameter.  A call to New_Line will add line/page
162
      -- termination characters, which will be available  for processing
163
      -- along with the text in the file.
164
      begin
165
         Put_Line (The_File, TC_String_Ptr_Array(1).all);
166
         New_Line (The_File, Spacing => 1);
167
         Put_Line (The_File, TC_String_Ptr_Array(2).all);
168
      end Load_File;
169
 
170
 
171
   begin
172
 
173
      -- Create user-defined text file that will serve as the appropriate
174
      -- sources of input to the procedures under test.
175
 
176
      Create_New_File (User_Defined_Input_File, Out_File, 1);
177
 
178
      -- Enter several lines of text into the new input file.
179
      -- The characters that make up these text strings will be processed
180
      -- using the procedures being exercised in this test.
181
 
182
      Load_File (User_Defined_Input_File);
183
 
184
      -- Check that Mode_Error is raised by Look_Ahead and Get_Immedidate
185
      -- if the mode of the file object is not In_File.
186
      -- Currently, the file mode is Out_File.
187
 
188
      begin
189
         Look_Ahead(User_Defined_Input_File, UDLA_Char, UDLA_End_Of_Line);
190
         Report.Failed("Mode_Error not raised by Look_Ahead");
191
         Report.Comment("This char should never be printed: " & UDLA_Char);
192
      exception
193
         when Mode_Error => null;  -- OK, expected exception.
194
         when The_Error : others =>
195
            Report.Failed ("The following exception was raised during the " &
196
                           "check that Look_Ahead raised Mode_Error when "  &
197
                           "provided a file object that is not in In_File " &
198
                           "mode: " & Exception_Name(The_Error));
199
      end;
200
 
201
      begin
202
         Get_Immediate(User_Defined_Input_File, UDGI_Char);
203
         Report.Failed("Mode_Error not raised by Get_Immediate");
204
         Report.Comment("This char should never be printed: " & UDGI_Char);
205
      exception
206
         when Mode_Error => null;  -- OK, expected exception.
207
         when The_Error : others =>
208
            Report.Failed ("The following exception was raised during the " &
209
                           "check that Get_Immediate raised Mode_Error "    &
210
                           "when provided a file object that is not in "    &
211
                           "In_File mode: " & Exception_Name(The_Error));
212
      end;
213
 
214
 
215
      -- The file will then be reset to In_File mode to properly function as
216
      -- a source of input.
217
 
218
      Reset1:
219
      begin
220
         Reset (User_Defined_Input_File, In_File);
221
      exception
222
         when Ada.Text_IO.Use_Error =>
223
            Report.Not_Applicable
224
               ( "Reset to In_File not supported for Text_IO" );
225
            raise No_Reset;
226
      end Reset1;
227
 
228
      -- Process the input file, exercising various Text_IO
229
      -- functionality, and validating the results at each step.
230
      -- Note: The designated File_Access object is used in processing
231
      --       the New_Default_Input_File in the second loop below.
232
 
233
      -- Process characters in first line of text of each file.
234
 
235
      Char_Pos := 1;
236
 
237
      -- Check that the first line is not blank.
238
 
239
      Look_Ahead(User_Defined_Input_File, UDLA_Char, UDLA_End_Of_Line);
240
 
241
      while not UDLA_End_Of_Line loop
242
 
243
         -- Use the Get_Immediate procedure on the file to get the next
244
         -- available character on the current line.
245
 
246
         Get_Immediate(User_Defined_Input_File, UDGI_Char);
247
 
248
         -- Check that the characters returned by both procedures are the
249
         -- same, and that they match the expected character from the file.
250
 
251
         if UDLA_Char /= TC_String_Ptr_Array(1).all(Char_Pos) or
252
            UDGI_Char /= TC_String_Ptr_Array(1).all(Char_Pos)
253
         then
254
            Report.Failed("Incorrect retrieval of character " &
255
                          Integer'Image(Char_Pos) & " of first string");
256
         end if;
257
 
258
         -- Increment the character position counter.
259
         Char_Pos := Char_Pos + 1;
260
 
261
         -- Check the next character on the line.  If at the end of line,
262
         -- the processing flow will exit the While loop.
263
 
264
         Look_Ahead(User_Defined_Input_File, UDLA_Char, UDLA_End_Of_Line);
265
 
266
      end loop;
267
 
268
      -- Check to ensure that the "end of line" results returned from the
269
      -- Look_Ahead procedure (used to exit the above While loop) corresponds
270
      -- with the result of Function End_Of_Line.
271
 
272
      if not End_Of_Line(User_Defined_Input_File)
273
      then
274
         Report.Failed("Result of procedure Look_Ahead that indicated "    &
275
                       "being at the end of the line does not correspond " &
276
                       "with the result of function End_Of_Line");
277
      end if;
278
 
279
      -- Check that all characters in the string were processed.
280
 
281
      if Char_Pos-1 /= TC_String_1'Length then
282
         Report.Failed("Not all of the characters on the first line " &
283
                       "were processed");
284
      end if;
285
 
286
 
287
      -- Call procedure Skip_Line to advance beyond the end of the first line.
288
 
289
      Skip_Line(User_Defined_Input_File);
290
 
291
 
292
      -- Process the second line in the file (a blank line).
293
 
294
      Look_Ahead(User_Input_Ptr.all, UDLA_Char, UDLA_End_Of_Line);
295
 
296
      if not UDLA_End_Of_Line then
297
         Report.Failed("Incorrect end of line determination from procedure " &
298
                       "Look_Ahead when processing a blank line");
299
      end if;
300
 
301
      -- Call procedure Skip_Line to advance beyond the end of the second line.
302
 
303
      Skip_Line(User_Input_Ptr.all);
304
 
305
 
306
      -- Process characters in the third line of the file (second line
307
      -- of text)
308
      -- Note: The version of Get_Immediate used in processing this line has
309
      --       the Boolean parameter Available.
310
 
311
      Char_Pos := 1;
312
 
313
      -- Check whether the line is blank (i.e., at end of line, page, or file).
314
 
315
      Look_Ahead(User_Input_Ptr.all, UDLA_Char, UDLA_End_Of_Line);
316
 
317
      while not UDLA_End_Of_Line loop
318
 
319
         -- Use the Get_Immediate procedure on the file to get access to the
320
         -- next character on the current line.
321
 
322
         Get_Immediate(User_Input_Ptr.all, UDGI_Char, UDGI_Available);
323
 
324
         -- Check that the Available parameter of Get_Immediate was set
325
         -- to indicate that a character was available in the file.
326
         -- Check that the characters returned by both procedures are the
327
         -- same, and they all match the expected character from the file.
328
 
329
         if not UDGI_Available                                or
330
            UDLA_Char /= TC_String_Ptr_Array(2).all(Char_Pos) or
331
            UDGI_Char /= TC_String_Ptr_Array(2).all(Char_Pos)
332
         then
333
            Report.Failed("Incorrect retrieval of character " &
334
                          Integer'Image(Char_Pos) & " of second string");
335
         end if;
336
 
337
         -- Increment the character position counter.
338
 
339
         Char_Pos := Char_Pos + 1;
340
 
341
         -- Check the next character on the line.  If at the end of line,
342
         -- the processing flow will exit the While loop.
343
 
344
         Look_Ahead(User_Input_Ptr.all, UDLA_Char, UDLA_End_Of_Line);
345
 
346
      end loop;
347
 
348
      -- Check to ensure that the "end of line" results returned from the
349
      -- Look_Ahead procedure (used to exit the above While loop) corresponds
350
      -- with the result of Function End_Of_Line.
351
 
352
      if not End_Of_Line(User_Defined_Input_File)
353
      then
354
         Report.Failed("Result of procedure Look_Ahead that indicated "    &
355
                       "being at the end of the line does not correspond " &
356
                       "with the result of function End_Of_Line");
357
      end if;
358
 
359
      -- Check that all characters in the second string were processed.
360
 
361
      if Char_Pos-1 /= TC_String_2'Length then
362
         Report.Failed("Not all of the characters on the second line " &
363
                       "were processed");
364
      end if;
365
 
366
 
367
      Deletion:
368
      begin
369
         -- Delete the user defined file.
370
 
371
         if Is_Open(User_Defined_Input_File) then
372
            Delete(User_Defined_Input_File);
373
         else
374
            Open(User_Defined_Input_File, Out_File, Report.Legal_File_Name(1));
375
            Delete(User_Defined_Input_File);
376
         end if;
377
      exception
378
         when others =>
379
            Report.Failed
380
               ( "Delete not properly implemented for Text_IO" );
381
      end Deletion;
382
 
383
 
384
   exception
385
 
386
      when No_Reset =>
387
         null;
388
 
389
      when Non_Applicable_System =>
390
         Report.Not_Applicable("System not capable of supporting external " &
391
                               "text files -- Name_Error/Use_Error raised " &
392
                               "during text file creation");
393
      when The_Error : others =>
394
         Report.Failed ("The following exception was raised in the " &
395
                        "Test_Block: " & Exception_Name(The_Error));
396
   end Test_Block;
397
 
398
   Report.Result;
399
 
400
end CXAA017;

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