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6b7deda8 | 1 | // 2001-05-21 Benjamin Kosnik <bkoz@redhat.com> |
2 | ||
f1717362 | 3 | // Copyright (C) 2001-2016 Free Software Foundation, Inc. |
6b7deda8 | 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 | |
6bc9506f | 8 | // Free Software Foundation; either version 3, or (at your option) |
6b7deda8 | 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 | |
6bc9506f | 17 | // with this library; see the file COPYING3. If not see |
18 | // <http://www.gnu.org/licenses/>. | |
6b7deda8 | 19 | |
20 | // 27.8.1.4 Overridden virtual functions | |
21 | ||
b14642ed | 22 | // { dg-require-fileio "" } |
23 | ||
6b7deda8 | 24 | #include <fstream> |
25 | #include <testsuite_hooks.h> | |
26 | #include <testsuite_io.h> | |
27 | ||
28 | // @require@ %-*.tst %-*.txt | |
29 | // @diff@ %-*.tst %*.txt | |
30 | ||
31 | const char name_01[] = "tmp_sputbackc_2io.tst"; // empty file, need to create | |
32 | ||
33 | void test01() | |
34 | { | |
35 | using namespace std; | |
56dcf3cc | 36 | using namespace __gnu_test; |
6b7deda8 | 37 | |
38 | typedef filebuf::int_type int_type; | |
39 | typedef filebuf::traits_type traits_type; | |
40 | typedef size_t size_type; | |
41 | ||
f8ef786c | 42 | bool test __attribute__((unused)) = true; |
6b7deda8 | 43 | streamsize strmsz_1, strmsz_2; |
44 | int_type c1, c2, c3; | |
45 | ||
46 | // int_type sputbackc(char_type c) | |
47 | // if in_cur not avail || ! traits::eq(c, gptr() [-1]), return pbfail | |
48 | // otherwise decrements in_cur and returns *gptr() | |
49 | ||
50 | // in | out | |
51 | { | |
52 | constraint_filebuf fb_01; | |
53 | fb_01.pubsetbuf(0, 0); | |
54 | fb_01.open(name_01, ios_base::out | ios_base::in | ios_base::trunc); | |
55 | VERIFY( fb_01.unbuffered() ); | |
56 | strmsz_1 = fb_01.sputn("racadabras", 10);//"abracadabras or what?" | |
57 | strmsz_2 = fb_01.sputn(", i wanna reach out and", 10); | |
9fe93909 | 58 | fb_01.pubseekoff(0, std::ios_base::cur); |
6b7deda8 | 59 | c1 = fb_01.sgetc(); // -1 |
60 | c2 = fb_01.sputbackc('z'); | |
61 | strmsz_2 = fb_01.in_avail(); | |
62 | c3 = fb_01.sgetc(); | |
63 | VERIFY( c3 == c2 ); | |
64 | VERIFY( c1 != c3 ); | |
65 | VERIFY( 1 == strmsz_2 ); | |
66 | //test for _in_cur == _in_beg | |
67 | // fb_01._M_out_beg = "bd23456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZracada" etc | |
9fe93909 | 68 | fb_01.pubseekoff(10, std::ios_base::beg); |
6b7deda8 | 69 | fb_01.sputc('m'); |
9fe93909 | 70 | fb_01.pubseekoff(0, std::ios_base::cur); |
6b7deda8 | 71 | strmsz_1 = fb_01.in_avail(); |
72 | c1 = fb_01.sgetc(); | |
73 | fb_01.snextc(); | |
74 | c2 = fb_01.sputbackc('z'); | |
75 | strmsz_2 = fb_01.in_avail(); | |
76 | c3 = fb_01.sgetc(); | |
77 | VERIFY( c1 != c2 ); | |
78 | VERIFY( c3 == c2 ); | |
79 | VERIFY( c1 != c3 ); | |
80 | VERIFY( c2 == 'z' ); | |
81 | // test for replacing char with identical one | |
82 | fb_01.snextc(); | |
9fe93909 | 83 | fb_01.pubseekoff(0, std::ios_base::cur); |
6b7deda8 | 84 | fb_01.sputc('u'); |
85 | fb_01.sputc('v'); | |
86 | fb_01.sputc('a'); | |
9fe93909 | 87 | fb_01.pubseekoff(0, std::ios_base::end); |
6b7deda8 | 88 | strmsz_1 = fb_01.in_avail(); |
89 | c2 = fb_01.sputbackc('a'); | |
90 | strmsz_2 = fb_01.in_avail(); | |
91 | c3 = fb_01.sgetc(); | |
92 | VERIFY( c3 == c2 ); | |
9fe93909 | 93 | VERIFY( strmsz_1 + 1 == strmsz_2 ); |
6b7deda8 | 94 | VERIFY( fb_01.unbuffered() ); |
95 | } | |
96 | } | |
97 | ||
f8ef786c | 98 | int main() |
6b7deda8 | 99 | { |
100 | test01(); | |
101 | return 0; | |
102 | } |