1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 2bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 3f5256e16dfc425c1d466f6308d4026d529ce9e0bHoward Hinnant// The LLVM Compiler Infrastructure 4bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 5b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// This file is dual licensed under the MIT and the University of Illinois Open 6b64f8b07c104c6cc986570ac8ee0ed16a9f23976Howard Hinnant// Source Licenses. See LICENSE.TXT for details. 7bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// 8bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant//===----------------------------------------------------------------------===// 9bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 10bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// <fstream> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// int_type pbackfail(int_type c = traits::eof()); 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// This test is not entirely portable 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <fstream> 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class CharT> 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct test_buf 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::basic_filebuf<CharT> 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_filebuf<CharT> base; 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef typename base::char_type char_type; 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef typename base::int_type int_type; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef typename base::traits_type traits_type; 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant char_type* eback() const {return base::eback();} 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant char_type* gptr() const {return base::gptr();} 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant char_type* egptr() const {return base::egptr();} 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant void gbump(int n) {base::gbump(n);} 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant virtual int_type pbackfail(int_type c = traits_type::eof()) {return base::pbackfail(c);} 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test_buf<char> f; 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.open("underflow.dat", std::ios_base::in) != 0); 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.is_open()); 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sbumpc() == '1'); 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == '2'); 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.pbackfail('a') == -1); 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test_buf<char> f; 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.open("underflow.dat", std::ios_base::in | std::ios_base::out) != 0); 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.is_open()); 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sbumpc() == '1'); 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == '2'); 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.pbackfail('a') == 'a'); 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sbumpc() == 'a'); 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == '2'); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 56256813f4e7915d64776a4edd5f4765d893b9f062Howard Hinnant} 57