libcxx/test/std/depr/depr.str.strstreams/depr.strstreambuf/depr.strstreambuf.virtuals/seekoff.pass.cpp

   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
  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 }