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// <strstream> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class strstreambuf 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// int_type underflow(); 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <strstream> 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct test 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::strstreambuf 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::strstreambuf base; 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test(char* gnext_arg, std::streamsize n, char* pbeg_arg = 0) 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : base(gnext_arg, n, pbeg_arg) {} 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test(const char* gnext_arg, std::streamsize n) 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : base(gnext_arg, n) {} 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant base::int_type underflow() {return base::underflow();} 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant char buf[10] = "123"; 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant test sb(buf, 0, buf + 3); 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '1'); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '1'); 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.snextc() == '2'); 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '2'); 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '2'); 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.snextc() == '3'); 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '3'); 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '3'); 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.snextc() == EOF); 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == EOF); 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == EOF); 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant sb.sputc('4'); 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '4'); 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(sb.underflow() == '4'); 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 52