]>
Commit | Line | Data |
---|---|---|
1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> | |
2 | ||
3 | // Copyright (C) 2001-2020 Free Software Foundation, Inc. | |
4 | // | |
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 3, or (at your option) | |
9 | // any later version. | |
10 | ||
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. | |
15 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING3. If not see | |
18 | // <http://www.gnu.org/licenses/>. | |
19 | ||
20 | // The ARM simulator does not provide support for "fstat", which | |
21 | // causes "in_avail" to return an incorrect value. | |
22 | // { dg-do run { xfail arm*-*-elf arm*-*-eabi } } | |
23 | ||
24 | // 27.8.1.4 Overridden virtual functions | |
25 | ||
26 | // { dg-require-fileio "" } | |
27 | // { dg-require-binary-io "" } | |
28 | ||
29 | #include <fstream> | |
30 | #include <testsuite_hooks.h> | |
31 | #include <testsuite_io.h> | |
32 | ||
33 | // @require@ %-*.tst %-*.txt | |
34 | // @diff@ %-*.tst %*.txt | |
35 | ||
36 | const char name_01[] = "sgetn.txt"; // file with data in it | |
37 | ||
38 | // Test overloaded virtual functions. | |
39 | void test05() | |
40 | { | |
41 | using namespace std; | |
42 | using namespace __gnu_test; | |
43 | typedef filebuf::int_type int_type; | |
44 | typedef filebuf::traits_type traits_type; | |
45 | ||
46 | streamsize strmsz_1, strmsz_2; | |
47 | char carray1[13] = ""; | |
48 | char carray2[8192] = ""; | |
49 | char buffer[8192] = ""; | |
50 | int_type c1, c4; | |
51 | ||
52 | // streamsize sgetn(char_type *s, streamsize n) | |
53 | // streamsize xsgetn(char_type *s, streamsize n) | |
54 | // assign up to n chars to s from input sequence, indexing in_cur as | |
55 | // approp and returning the number of chars assigned | |
56 | ||
57 | // in | |
58 | { | |
59 | constraint_filebuf fb_01; | |
60 | // Need this since BUFSIZ is only guaranteed >= 255 and we want | |
61 | // to trigger the same underflow situation everywhere. | |
62 | fb_01.pubsetbuf(buffer, 8192); | |
63 | fb_01.open(name_01, ios_base::in); | |
64 | VERIFY( !fb_01.write_position() ); | |
65 | strmsz_1 = fb_01.in_avail(); // 8261 | |
66 | strmsz_2 = fb_01.sgetn(carray1, 10); | |
67 | VERIFY( strmsz_2 == 10 ); | |
68 | strmsz_2 = fb_01.in_avail(); | |
69 | VERIFY( strmsz_1 > strmsz_2 ); | |
70 | c1 = fb_01.sgetc(); | |
71 | VERIFY( c1 == 'b' ); | |
72 | strmsz_1 = fb_01.in_avail(); | |
73 | strmsz_2 = fb_01.sgetn(carray2, strmsz_1 + 5); | |
74 | VERIFY( strmsz_1 == strmsz_2 - 5 ); | |
75 | c4 = fb_01.sgetc(); // buffer should have underflowed from above. | |
76 | VERIFY( c4 == 'e' ); | |
77 | strmsz_1 = fb_01.in_avail(); | |
78 | VERIFY( strmsz_1 > 0 ); | |
79 | strmsz_2 = fb_01.sgetn(carray2, strmsz_1 + 5); | |
80 | VERIFY( strmsz_1 == strmsz_2 ); //at the end of the actual file | |
81 | VERIFY( !fb_01.write_position() ); | |
82 | VERIFY( !fb_01.read_position() ); | |
83 | } | |
84 | } | |
85 | ||
86 | int main() | |
87 | { | |
88 | test05(); | |
89 | return 0; | |
90 | } |