URL
https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
Subversion Repositories openrisc_2011-10-31
[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [libstdc++-v3/] [testsuite/] [27_io/] [basic_filebuf/] [seekoff/] [wchar_t/] [9875_seekoff.cc] - Rev 565
Compare with Previous | Blame | View Log
// Copyright (C) 2003, 2009 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library is free // software; you can redistribute it and/or modify it under the // terms of the GNU General Public License as published by the // Free Software Foundation; either version 3, or (at your option) // any later version. // This library is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. // 27.8.1.4 Overridden virtual functions // { dg-xfail-run-if "not supported on OR32 newlib" { or32-*-elf } } #include <fstream> #include <locale> #include <algorithm> #include <cstring> #include <testsuite_hooks.h> class Cvt : public std::codecvt<wchar_t, char, mbstate_t> { protected: virtual std::codecvt_base::result do_out(std::mbstate_t&, const wchar_t* from, const wchar_t* from_end, const wchar_t*& from_next, char* to, char* to_end, char*& to_next) const { std::size_t from_len = from_end - from; std::size_t to_len = (to_end - to) / sizeof(wchar_t); std::size_t len = std::min(from_len, to_len); std::memcpy(to, from, len * sizeof(wchar_t)); from_next = from + len; to_next = to + len * sizeof(wchar_t); return from_next == from_end ? std::codecvt_base::ok : std::codecvt_base::partial; } virtual std::codecvt_base::result do_in(std::mbstate_t&, const char* from, const char* from_end, const char*& from_next, wchar_t* to, wchar_t* to_end, wchar_t*& to_next) const { std::size_t from_len = (from_end - from) / sizeof(wchar_t); std::size_t to_len = to_end - to; std::size_t len = std::min(from_len, to_len); std::memcpy(to, from, len * sizeof(wchar_t)); from_next = from + len * sizeof(wchar_t); to_next = to + len; return from_next == from_end ? std::codecvt_base::ok : std::codecvt_base::partial; } virtual std::codecvt_base::result do_unshift(std::mbstate_t&, char*, char*, char*&) const { return std::codecvt_base::noconv; } virtual int do_encoding() const throw() { return sizeof(wchar_t); } virtual bool do_always_noconv() const throw() { return false; } virtual int do_length(std::mbstate_t&, const char* from, const char* end, std::size_t max) { std::size_t len = (end - from) / sizeof(wchar_t); return std::min(len, max) * sizeof(wchar_t); } virtual int do_max_length() const throw() { return sizeof(wchar_t); } }; void test01() { using namespace std; bool test __attribute__((unused)) = true; // seekoff wfilebuf fb; fb.pubimbue(locale(locale::classic(), new Cvt)); fb.open("tmp_9875_seekoff", ios_base::out | ios_base::in | ios_base::trunc); fb.sputn(L"0123456789", 10); fb.pubseekoff(-3, ios_base::cur); VERIFY( fb.sgetc() == L'7' ); fb.pubseekoff(-3, ios_base::cur); VERIFY( fb.sgetc() == L'4' ); fb.close(); } int main() { test01(); return 0; }