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// <ostream> 11bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 12bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// template <class charT, class traits = char_traits<charT> > 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// class basic_ostream; 14bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// basic_ostream<charT,traits>& seekp(off_type off, ios_base::seekdir dir); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <ostream> 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint seekoff_called = 0; 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnanttemplate <class CharT> 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantstruct testbuf 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant : public std::basic_streambuf<CharT> 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::basic_streambuf<CharT> base; 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf() {} 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantprotected: 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 31256813f4e7915d64776a4edd5f4765d893b9f062Howard Hinnant typename base::pos_type 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant seekoff(typename base::off_type off, std::ios_base::seekdir way, 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ios_base::openmode which) 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant ++seekoff_called; 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(way == std::ios_base::beg); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(which == std::ios_base::out); 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant return off; 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant}; 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 451224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow seekoff_called = 0; 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream os((std::streambuf*)0); 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(&os.seekp(5, std::ios_base::beg) == &os); 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(seekoff_called == 0); 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 511224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow seekoff_called = 0; 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant testbuf<char> sb; 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::ostream os(&sb); 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(&os.seekp(10, std::ios_base::beg) == &os); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(seekoff_called == 1); 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(os.good()); 57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(&os.seekp(-1, std::ios_base::beg) == &os); 58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(seekoff_called == 2); 5976a8670ce4404429a36ea8672590da79172528c8Marshall Clow assert(os.fail()); 60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 61b7fd0be37076c8fe5a26a5850580426bcd4c0740Eric Fiselier { // See https://bugs.llvm.org/show_bug.cgi?id=21361 621224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow seekoff_called = 0; 631224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow testbuf<char> sb; 641224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow std::ostream os(&sb); 651224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow os.setstate(std::ios_base::eofbit); 661224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow assert(&os.seekp(10, std::ios_base::beg) == &os); 671224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow assert(seekoff_called == 1); 681224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow assert(os.rdstate() == std::ios_base::eofbit); 691224e8972b770cb1ec35d7acb27ec43556969d12Marshall Clow } 70bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 71