111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert//===----------------------------------------------------------------------===// 211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// 311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// The LLVM Compiler Infrastructure 411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// 511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// This file is dual licensed under the MIT and the University of Illinois Open 611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// Source Licenses. See LICENSE.TXT for details. 711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// 811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert//===----------------------------------------------------------------------===// 911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// <ostream> 1111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// template <class charT, class traits = char_traits<charT> > 1311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// class basic_ostream; 1411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert// basic_ostream<charT,traits>& seekp(pos_type pos); 1611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 1711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <ostream> 1811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert#include <cassert> 1911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2011cd02dfb91661c65134cac258cf5924270e9d2Dan Albertint seekpos_called = 0; 2111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2211cd02dfb91661c65134cac258cf5924270e9d2Dan Alberttemplate <class CharT> 2311cd02dfb91661c65134cac258cf5924270e9d2Dan Albertstruct testbuf 2411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert : public std::basic_streambuf<CharT> 2511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert{ 2611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert typedef std::basic_streambuf<CharT> base; 2711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert testbuf() {} 2811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 2911cd02dfb91661c65134cac258cf5924270e9d2Dan Albertprotected: 3011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 3111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert typename base::pos_type 3211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert seekpos(typename base::pos_type sp, std::ios_base::openmode which) 3311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert { 3411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert ++seekpos_called; 3511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(which == std::ios_base::out); 3611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert return sp; 3711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert } 3811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert}; 3911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert 4011cd02dfb91661c65134cac258cf5924270e9d2Dan Albertint main() 4111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert{ 4211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert { 4311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert std::ostream os((std::streambuf*)0); 4411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(&os.seekp(5) == &os); 4511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(seekpos_called == 0); 4611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert } 4711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert { 4811cd02dfb91661c65134cac258cf5924270e9d2Dan Albert testbuf<char> sb; 4911cd02dfb91661c65134cac258cf5924270e9d2Dan Albert std::ostream os(&sb); 5011cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(&os.seekp(10) == &os); 5111cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(seekpos_called == 1); 5211cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(os.good()); 5311cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(&os.seekp(-1) == &os); 5411cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(seekpos_called == 2); 5511cd02dfb91661c65134cac258cf5924270e9d2Dan Albert assert(os.fail()); 5611cd02dfb91661c65134cac258cf5924270e9d2Dan Albert } 5711cd02dfb91661c65134cac258cf5924270e9d2Dan Albert} 58