45 lines · 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-exception6//7//===----------------------------------------------------------------------===//8 9// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_STRSTREAM10 11// <strstream>12 13// class strstreambuf14 15// pos_type seekpos(pos_type sp,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 23int main(int, char**)24{25 {26 char buf[] = "0123456789";27 std::strstreambuf sb(buf, 0);28 assert(sb.pubseekpos(3, std::ios_base::out) == -1);29 assert(sb.pubseekpos(3, std::ios_base::in | std::ios_base::out) == -1);30 assert(sb.pubseekpos(3, std::ios_base::in) == 3);31 assert(sb.sgetc() == '3');32 }33 {34 char buf[] = "0123456789";35 std::strstreambuf sb(buf, 0, buf);36 assert(sb.pubseekpos(3, std::ios_base::in) == 3);37 assert(sb.pubseekpos(3, std::ios_base::out | std::ios_base::in) == 3);38 assert(sb.pubseekpos(3, std::ios_base::out) == 3);39 assert(sb.sputc('a') == 'a');40 assert(sb.str() == std::string("012a456789"));41 }42 43 return 0;44}45