1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // <strstream>
10
11 // class strstreambuf
12
13 // pos_type seekoff(off_type off, ios_base::seekdir way,
14 // ios_base::openmode which = ios_base::in | ios_base::out);
15
16 #include <strstream>
17 #include <cassert>
18
19 #include "test_macros.h"
20
main(int,char **)21 int main(int, char**)
22 {
23 {
24 char buf[] = "0123456789";
25 std::strstreambuf sb(buf, 0);
26 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
27 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
28 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
29 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
30 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
31 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
32 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
33 assert(sb.sgetc() == '3');
34 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
35 assert(sb.sgetc() == '6');
36 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
37 assert(sb.sgetc() == '7');
38 }
39 {
40 char buf[] = "0123456789";
41 std::strstreambuf sb(buf, 0, buf);
42 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
43 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
44 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
45 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
46 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
47 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
48 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
49 assert(sb.sputc('a') == 'a');
50 assert(sb.str() == std::string("012a456789"));
51 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
52 assert(sb.sputc('b') == 'b');
53 assert(sb.str() == std::string("012a456b89"));
54 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
55 assert(sb.sputc('c') == 'c');
56 assert(sb.str() == std::string("012a456c89"));
57 }
58
59 return 0;
60 }
61