forked from OSchip/llvm-project
143 lines
4.2 KiB
C++
143 lines
4.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <fstream>
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// int_type overflow(int_type c = traits::eof());
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// This test is not entirely portable
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#include <fstream>
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#include <cassert>
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#include "platform_support.h" // locale name macros
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template <class CharT>
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struct test_buf
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: public std::basic_filebuf<CharT>
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{
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typedef std::basic_filebuf<CharT> base;
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typedef typename base::char_type char_type;
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typedef typename base::int_type int_type;
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typedef typename base::traits_type traits_type;
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char_type* pbase() const {return base::pbase();}
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char_type* pptr() const {return base::pptr();}
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char_type* epptr() const {return base::epptr();}
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void gbump(int n) {base::gbump(n);}
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virtual int_type overflow(int_type c = traits_type::eof()) {return base::overflow(c);}
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};
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int main()
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{
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{
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test_buf<char> f;
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assert(f.open("overflow.dat", std::ios_base::out) != 0);
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assert(f.is_open());
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assert(f.pbase() == 0);
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assert(f.pptr() == 0);
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assert(f.epptr() == 0);
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assert(f.overflow('a') == 'a');
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assert(f.pbase() != 0);
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assert(f.pptr() == f.pbase());
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assert(f.epptr() - f.pbase() == 4095);
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}
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{
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test_buf<char> f;
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assert(f.open("overflow.dat", std::ios_base::in) != 0);
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assert(f.is_open());
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assert(f.sgetc() == 'a');
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}
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std::remove("overflow.dat");
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{
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test_buf<char> f;
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f.pubsetbuf(0, 0);
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assert(f.open("overflow.dat", std::ios_base::out) != 0);
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assert(f.is_open());
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assert(f.pbase() == 0);
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assert(f.pptr() == 0);
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assert(f.epptr() == 0);
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assert(f.overflow('a') == 'a');
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assert(f.pbase() == 0);
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assert(f.pptr() == 0);
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assert(f.epptr() == 0);
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}
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{
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test_buf<char> f;
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assert(f.open("overflow.dat", std::ios_base::in) != 0);
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assert(f.is_open());
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assert(f.sgetc() == 'a');
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}
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std::remove("overflow.dat");
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{
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test_buf<wchar_t> f;
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assert(f.open("overflow.dat", std::ios_base::out) != 0);
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assert(f.is_open());
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assert(f.pbase() == 0);
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assert(f.pptr() == 0);
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assert(f.epptr() == 0);
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assert(f.overflow(L'a') == L'a');
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assert(f.pbase() != 0);
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assert(f.pptr() == f.pbase());
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assert(f.epptr() - f.pbase() == 4095);
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}
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{
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test_buf<wchar_t> f;
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assert(f.open("overflow.dat", std::ios_base::in) != 0);
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assert(f.is_open());
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assert(f.sgetc() == L'a');
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}
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std::remove("overflow.dat");
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{
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test_buf<wchar_t> f;
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f.pubsetbuf(0, 0);
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assert(f.open("overflow.dat", std::ios_base::out) != 0);
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assert(f.is_open());
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assert(f.pbase() == 0);
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assert(f.pptr() == 0);
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assert(f.epptr() == 0);
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assert(f.overflow(L'a') == L'a');
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assert(f.pbase() == 0);
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assert(f.pptr() == 0);
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assert(f.epptr() == 0);
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}
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{
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test_buf<wchar_t> f;
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assert(f.open("overflow.dat", std::ios_base::in) != 0);
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assert(f.is_open());
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assert(f.sgetc() == L'a');
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}
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std::remove("overflow.dat");
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{
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test_buf<wchar_t> f;
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f.pubimbue(std::locale(LOCALE_en_US_UTF_8));
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assert(f.open("overflow.dat", std::ios_base::out) != 0);
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assert(f.sputc(0x4E51) == 0x4E51);
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assert(f.sputc(0x4E52) == 0x4E52);
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assert(f.sputc(0x4E53) == 0x4E53);
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}
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{
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test_buf<char> f;
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assert(f.open("overflow.dat", std::ios_base::in) != 0);
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assert(f.is_open());
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assert(f.sbumpc() == 0xE4);
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assert(f.sbumpc() == 0xB9);
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assert(f.sbumpc() == 0x91);
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assert(f.sbumpc() == 0xE4);
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assert(f.sbumpc() == 0xB9);
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assert(f.sbumpc() == 0x92);
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assert(f.sbumpc() == 0xE4);
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assert(f.sbumpc() == 0xB9);
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assert(f.sbumpc() == 0x93);
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assert(f.sbumpc() == -1);
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}
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std::remove("overflow.dat");
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}
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