| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // In macosx10.9 to macosx10.14, streams are provided in the dylib AND they |
| // have a bug in how they handle null-termination in case of errors (see D40677). |
| // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12|13|14}} |
| |
| // <istream> |
| |
| // basic_istream<charT,traits>& getline(char_type* s, streamsize n); |
| |
| #include <istream> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| |
| template <class CharT> |
| struct testbuf |
| : public std::basic_streambuf<CharT> |
| { |
| typedef std::basic_string<CharT> string_type; |
| typedef std::basic_streambuf<CharT> base; |
| private: |
| string_type str_; |
| public: |
| |
| testbuf() {} |
| testbuf(const string_type& str) |
| : str_(str) |
| { |
| base::setg(const_cast<CharT*>(str_.data()), |
| const_cast<CharT*>(str_.data()), |
| const_cast<CharT*>(str_.data()) + str_.size()); |
| } |
| |
| CharT* eback() const {return base::eback();} |
| CharT* gptr() const {return base::gptr();} |
| CharT* egptr() const {return base::egptr();} |
| }; |
| |
| int main(int, char**) |
| { |
| { |
| testbuf<char> sb(" \n \n "); |
| std::istream is(&sb); |
| char s[5]; |
| is.getline(s, 5); |
| assert(!is.eof()); |
| assert(!is.fail()); |
| assert(std::string(s) == " "); |
| assert(is.gcount() == 3); |
| is.getline(s, 5); |
| assert(!is.eof()); |
| assert(!is.fail()); |
| assert(std::string(s) == " "); |
| assert(is.gcount() == 5); |
| is.getline(s, 5); |
| assert( is.eof()); |
| assert(!is.fail()); |
| assert(std::string(s) == " "); |
| assert(is.gcount() == 1); |
| // Check that even in error case the buffer is properly 0-terminated. |
| is.getline(s, 5); |
| assert( is.eof()); |
| assert( is.fail()); |
| assert(std::string(s) == ""); |
| assert(is.gcount() == 0); |
| } |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| { |
| testbuf<wchar_t> sb(L" \n \n "); |
| std::wistream is(&sb); |
| wchar_t s[5]; |
| is.getline(s, 5); |
| assert(!is.eof()); |
| assert(!is.fail()); |
| assert(std::wstring(s) == L" "); |
| assert(is.gcount() == 3); |
| is.getline(s, 5); |
| assert(!is.eof()); |
| assert(!is.fail()); |
| assert(std::wstring(s) == L" "); |
| assert(is.gcount() == 5); |
| is.getline(s, 5); |
| assert( is.eof()); |
| assert(!is.fail()); |
| assert(std::wstring(s) == L" "); |
| assert(is.gcount() == 1); |
| // Check that even in error case the buffer is properly 0-terminated. |
| is.getline(s, 5); |
| assert( is.eof()); |
| assert( is.fail()); |
| assert(std::wstring(s) == L""); |
| assert(is.gcount() == 0); |
| } |
| #endif |
| #ifndef TEST_HAS_NO_EXCEPTIONS |
| { |
| testbuf<char> sb(" "); |
| std::basic_istream<char> is(&sb); |
| char s[5] = "test"; |
| is.exceptions(std::ios_base::eofbit); |
| bool threw = false; |
| try { |
| is.getline(s, 5); |
| } catch (std::ios_base::failure&) { |
| threw = true; |
| } |
| assert(!is.bad()); |
| assert( is.eof()); |
| assert(!is.fail()); |
| assert(threw); |
| assert(std::basic_string<char>(s) == " "); |
| assert(is.gcount() == 1); |
| } |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| { |
| testbuf<wchar_t> sb(L" "); |
| std::basic_istream<wchar_t> is(&sb); |
| wchar_t s[5] = L"test"; |
| is.exceptions(std::ios_base::eofbit); |
| bool threw = false; |
| try { |
| is.getline(s, 5); |
| } catch (std::ios_base::failure&) { |
| threw = true; |
| } |
| assert(!is.bad()); |
| assert( is.eof()); |
| assert(!is.fail()); |
| assert(threw); |
| assert(std::basic_string<wchar_t>(s) == L" "); |
| assert(is.gcount() == 1); |
| } |
| #endif |
| |
| { |
| testbuf<char> sb; |
| std::basic_istream<char> is(&sb); |
| char s[5] = "test"; |
| is.exceptions(std::ios_base::eofbit); |
| bool threw = false; |
| try { |
| is.getline(s, 5); |
| } catch (std::ios_base::failure&) { |
| threw = true; |
| } |
| assert(!is.bad()); |
| assert( is.eof()); |
| assert( is.fail()); |
| assert(threw); |
| assert(std::basic_string<char>(s) == ""); |
| assert(is.gcount() == 0); |
| } |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| { |
| testbuf<wchar_t> sb; |
| std::basic_istream<wchar_t> is(&sb); |
| wchar_t s[5] = L"test"; |
| is.exceptions(std::ios_base::eofbit); |
| bool threw = false; |
| try { |
| is.getline(s, 5); |
| } catch (std::ios_base::failure&) { |
| threw = true; |
| } |
| assert(!is.bad()); |
| assert( is.eof()); |
| assert( is.fail()); |
| assert(threw); |
| assert(std::basic_string<wchar_t>(s) == L""); |
| assert(is.gcount() == 0); |
| } |
| #endif |
| #endif // TEST_HAS_NO_EXCEPTIONS |
| |
| return 0; |
| } |