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 // ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM
10
11 // <strstream>
12
13 // class strstreambuf
14
15 // pos_type seekoff(off_type off, ios_base::seekdir way,
16 // ios_base::openmode which = ios_base::in | ios_base::out);
17
18 #include <strstream>
19 #include <cassert>
20
21 #include "test_macros.h"
22
main(int,char **)23 int main(int, char**)
24 {
25 {
26 char buf[] = "0123456789";
27 std::strstreambuf sb(buf, 0);
28 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == -1);
29 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == -1);
30 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == -1);
31 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in | std::ios_base::out) == -1);
32 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in | std::ios_base::out) == -1);
33 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in | std::ios_base::out) == -1);
34 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
35 assert(sb.sgetc() == '3');
36 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
37 assert(sb.sgetc() == '6');
38 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
39 assert(sb.sgetc() == '7');
40 }
41 {
42 char buf[] = "0123456789";
43 std::strstreambuf sb(buf, 0, buf);
44 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::in) == 3);
45 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::in) == 6);
46 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::in) == 7);
47 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out | std::ios_base::in) == 3);
48 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out | std::ios_base::in) == -1);
49 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out | std::ios_base::in) == 7);
50 assert(sb.pubseekoff(3, std::ios_base::beg, std::ios_base::out) == 3);
51 assert(sb.sputc('a') == 'a');
52 assert(sb.str() == std::string("012a456789"));
53 assert(sb.pubseekoff(3, std::ios_base::cur, std::ios_base::out) == 7);
54 assert(sb.sputc('b') == 'b');
55 assert(sb.str() == std::string("012a456b89"));
56 assert(sb.pubseekoff(-3, std::ios_base::end, std::ios_base::out) == 7);
57 assert(sb.sputc('c') == 'c');
58 assert(sb.str() == std::string("012a456c89"));
59 }
60
61 return 0;
62 }
63