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 12256813f4e7915d64776a4edd5f4765d893b9f062Howard Hinnant// pos_type seekoff(off_type off, ios_base::seekdir way, 13bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// ios_base::openmode which = ios_base::in | ios_base::out); 14256813f4e7915d64776a4edd5f4765d893b9f062Howard Hinnant// pos_type seekpos(pos_type sp, 15bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// ios_base::openmode which = ios_base::in | ios_base::out); 16bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 17bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant// This test is not entirely portable 18bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 19bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <fstream> 20bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#include <cassert> 21bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant 22bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnantint main() 23bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant{ 24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant char buf[10]; 26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::filebuf::pos_type pos_type; 27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::filebuf f; 28bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.pubsetbuf(buf, sizeof(buf)); 29bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.open("seekoff.dat", std::ios_base::in | std::ios_base::out 30bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant | std::ios_base::trunc) != 0); 31bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.is_open()); 32bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.sputn("abcdefghijklmnopqrstuvwxyz", 26); 33bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(buf[0] == 'v'); 34bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant pos_type p = f.pubseekoff(-15, std::ios_base::cur); 35bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(p == 11); 36bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == 'l'); 37bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.pubseekoff(0, std::ios_base::beg); 38bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == 'a'); 39bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.pubseekoff(-1, std::ios_base::end); 40bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == 'z'); 41bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.pubseekpos(p) == p); 42bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == 'l'); 43bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 44bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::remove("seekoff.dat"); 45bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant { 46bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant wchar_t buf[10]; 47bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant typedef std::filebuf::pos_type pos_type; 48bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::wfilebuf f; 49bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.pubsetbuf(buf, sizeof(buf)/sizeof(buf[0])); 50bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.open("seekoff.dat", std::ios_base::in | std::ios_base::out 51bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant | std::ios_base::trunc) != 0); 52bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.is_open()); 53bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.sputn(L"abcdefghijklmnopqrstuvwxyz", 26); 54bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(buf[0] == L'v'); 55bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant pos_type p = f.pubseekoff(-15, std::ios_base::cur); 56bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(p == 11); 57bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == L'l'); 58bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.pubseekoff(0, std::ios_base::beg); 59bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == L'a'); 60bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant f.pubseekoff(-1, std::ios_base::end); 61bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == L'z'); 62bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.pubseekpos(p) == p); 63bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant assert(f.sgetc() == L'l'); 64bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant } 65bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant std::remove("seekoff.dat"); 66bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant} 67