63 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 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 23int 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