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1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
99dee823 | 3 | // Copyright (C) 2001-2021 Free Software Foundation, Inc. |
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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 | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
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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 | |
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17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
46c4e5d6 | 19 | |
517da0ce MM |
20 | // The ARM simulator does not provide support for "fstat", which |
21 | // causes "in_avail" to return an incorrect value. | |
049930c8 | 22 | // { dg-do run { xfail arm*-*-elf arm*-*-eabi } } |
517da0ce | 23 | |
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24 | // 27.8.1.4 Overridden virtual functions |
25 | ||
0c20e4ec | 26 | // { dg-require-fileio "" } |
f16fd827 | 27 | // { dg-require-binary-io "" } |
0c20e4ec | 28 | |
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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 | const char name_03[] = "tmp_sgetn_2io.tst"; // empty file, need to create | |
38 | ||
39 | // Test overloaded virtual functions. | |
40 | void test05() | |
41 | { | |
42 | using namespace std; | |
aecf642c | 43 | using namespace __gnu_test; |
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44 | typedef filebuf::int_type int_type; |
45 | typedef filebuf::traits_type traits_type; | |
46 | ||
11f10e6b | 47 | streamsize strmsz_1, strmsz_2; |
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48 | char carray1[13] = ""; |
49 | char carray2[8192] = ""; | |
11f10e6b | 50 | int_type c1, c4; |
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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 | out 1 | |
58 | { | |
59 | constraint_filebuf fb_03; | |
60 | fb_03.pubsetbuf(0, 0); | |
61 | fb_03.open(name_03, ios_base::out | ios_base::in | ios_base::trunc); | |
62 | VERIFY( fb_03.unbuffered() ); | |
63 | strmsz_1 = fb_03.sgetn(carray1, 10); | |
64 | VERIFY( strmsz_1 == 0 ); | |
65 | VERIFY( fb_03.unbuffered() ); | |
66 | } | |
67 | ||
68 | // in | out 2 | |
69 | { | |
70 | constraint_filebuf fb_01; | |
71 | fb_01.pubsetbuf(0, 0); | |
72 | fb_01.open(name_01, ios_base::in | ios_base::out); | |
73 | VERIFY( fb_01.unbuffered() ); | |
74 | strmsz_1 = fb_01.in_avail(); | |
75 | strmsz_2 = fb_01.sgetn(carray1, 10); | |
76 | VERIFY( strmsz_2 == 10 ); | |
77 | strmsz_2 = fb_01.in_avail(); | |
78 | VERIFY( strmsz_1 > strmsz_2 ); | |
79 | c1 = fb_01.sgetc(); | |
80 | VERIFY( c1 == 'b' ); | |
81 | strmsz_1 = fb_01.in_avail(); | |
82 | strmsz_2 = fb_01.sgetn(carray2, 8181 + 5); | |
83 | VERIFY( 8181 == strmsz_2 - 5 ); | |
84 | c4 = fb_01.sgetc(); // buffer should have underflowed from above. | |
5d2a0db5 | 85 | VERIFY( c4 == 'e' ); |
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86 | strmsz_1 = fb_01.in_avail(); |
87 | VERIFY( strmsz_1 > 0 ); | |
88 | strmsz_2 = fb_01.sgetn(carray2, 65 + 5); | |
5d2a0db5 | 89 | VERIFY( 70 == strmsz_2 ); //at the end of the actual file |
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90 | VERIFY( fb_01.unbuffered() ); |
91 | } | |
92 | } | |
93 | ||
11f10e6b | 94 | int main() |
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95 | { |
96 | test05(); | |
97 | return 0; | |
98 | } |