]>
git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/27_io/basic_filebuf/sgetn/char/2-io.cc
1 // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com>
3 // Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 2, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING. If not, write to the Free
18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
21 // 27.8.1.4 Overridden virtual functions
24 #include <testsuite_hooks.h>
25 #include <testsuite_io.h>
27 // @require@ %-*.tst %-*.txt
28 // @diff@ %-*.tst %*.txt
30 const char name_01
[] = "sgetn.txt"; // file with data in it
31 const char name_03
[] = "tmp_sgetn_2io.tst"; // empty file, need to create
33 // Test overloaded virtual functions.
37 using namespace __gnu_test
;
38 typedef filebuf::int_type int_type
;
39 typedef filebuf::traits_type traits_type
;
43 streamsize strmsz_1
, strmsz_2
, strmsz_3
;
44 int i
= 0, j
= 0, k
= 0;
45 char carray1
[13] = "";
46 char carray2
[8192] = "";
47 int_type c1
, c2
, c3
, c4
;
49 // streamsize sgetn(char_type *s, streamsize n)
50 // streamsize xsgetn(char_type *s, streamsize n)
51 // assign up to n chars to s from input sequence, indexing in_cur as
52 // approp and returning the number of chars assigned
56 constraint_filebuf fb_03
;
57 fb_03
.pubsetbuf(0, 0);
58 fb_03
.open(name_03
, ios_base::out
| ios_base::in
| ios_base::trunc
);
59 VERIFY( fb_03
.unbuffered() );
60 strmsz_1
= fb_03
.sgetn(carray1
, 10);
61 VERIFY( strmsz_1
== 0 );
62 VERIFY( fb_03
.unbuffered() );
67 constraint_filebuf fb_01
;
68 fb_01
.pubsetbuf(0, 0);
69 fb_01
.open(name_01
, ios_base::in
| ios_base::out
);
70 VERIFY( fb_01
.unbuffered() );
71 strmsz_1
= fb_01
.in_avail();
72 strmsz_2
= fb_01
.sgetn(carray1
, 10);
73 VERIFY( strmsz_2
== 10 );
74 strmsz_2
= fb_01
.in_avail();
75 VERIFY( strmsz_1
> strmsz_2
);
78 strmsz_1
= fb_01
.in_avail();
79 strmsz_2
= fb_01
.sgetn(carray2
, 8181 + 5);
80 VERIFY( 8181 == strmsz_2
- 5 );
81 c4
= fb_01
.sgetc(); // buffer should have underflowed from above.
83 strmsz_1
= fb_01
.in_avail();
84 VERIFY( strmsz_1
> 0 );
85 strmsz_2
= fb_01
.sgetn(carray2
, 65 + 5);
86 VERIFY( 65 == strmsz_2
); //at the end of the actual file
87 VERIFY( fb_01
.unbuffered() );