// 2003-09-08  Petur Runolfsson  <peturr02@ru.is>

// Copyright (C) 2003 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 2, 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 COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// 27.8.1.4 Overridden virtual functions

#include <fstream>
#include <locale>
#include <cstdio>
#include <testsuite_hooks.h>

// Check that basic_filebuf::seekoff handles UTF-8 when open for input.
void test01()
{
  using namespace std;
  typedef wfilebuf::pos_type pos_type;
  typedef wfilebuf::int_type int_type;

  bool test __attribute__((unused)) = true;
  const char name[] = "tmp_seekoff-1.tst";
  const int_type eof = wfilebuf::traits_type::eof();

  const char cstr[] =
    "\x1\x2\x3\x4\x5\x6\x7\x8\x9\xa\xb\xc\xd\xe\xf\x10\x11\x12\x13"
    "\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f\x20!\"#$%&"
    "'()*+,-./0123456789:;<=>?@}~\x7f\xc2\x80\xc2\x81\xc2\x82\xc2"
    "\x83\xc2\x84\xc2\x85\xc2\x86\xc2\x87\xc2\x88\xc2\x89\xc2\x8a"
    "\xc2\x8b\xc2\x8c\xc2\x8d\xc2\x8e\xc2\x8f\xc2\x90\xc2\x91\xc2"
    "\x92\xc2\x93\xc2\x94\xc2\x95\xc2\x96\xc2\x97\xc2\x98\xc2\x99"
    "\xc2\x9a\xc2\x9b\xc2\x9c\xc3\xba\xc3\xbb\xc3\xbc\xc3\xbd\xc3"
    "\xbe\xc3\xbf\xc4\x80\xc4\x81\xc4\x82\xc4\x83\xc4\x84\xc4\x85"
    "\xc4\x86\xc4\x87\xc4\x88\xc4\x89\xc4\x8a\xc4\x8b\xc4\x8c\xc4"
    "\x8d\xc4\x8e\xc4\x8f\xc4\x90\xc4\x91\xc4\x92\xc4\x93\xc4\x94"
    "\xc4\x95\xc4\x96\xc4\x97\xc4\x98\xc4\x99\xdf\xb8\xdf\xb9\xdf"
    "\xba\xdf\xbb\xdf\xbc\xdf\xbd\xdf\xbe\xdf\xbf\xe0\xa0\x80\xe0"
    "\xa0\x81\xe0\xa0\x82\xe0\xa0\x83\xe0\xa0\x84\xe0\xa0\x85\xe0"
    "\xa0\x86\xe0\xa0\x87\xe0\xa0\x88\xe0\xa0\x89\xe0\xa0\x8a\xe0"
    "\xa0\x8b\xe0\xa0\x8c\xe0\xa0\x8d\xe0\xa0\x8e\xe0\xa0\x8f\xe0"
    "\xa0\x90\xe0\xa0\x91\xe0\xa0\x92\xe0\xa0\x93\xe0\xa0\x94\xe0"
    "\xa0\x95\xe0\xa0\x96\xe0\xa0\x97\x1\x2\x4\x8\x10\x20@\xc2\x80"
    "\xc4\x80\xc8\x80\xd0\x80\xe0\xa0\x80\xe1\x80\x80\xe2\x80\x80"
    "\xe4\x80\x80\xe8\x80\x80\xf0\x90\x80\x80\xf0\xa0\x80\x80\xf1"
    "\x80\x80\x80\xf2\x80\x80\x80\xf4\x80\x80\x80\xf8\x88\x80\x80"
    "\x80\xf8\x90\x80\x80\x80\xf8\xa0\x80\x80\x80\xf9\x80\x80\x80"
    "\x80\xfa\x80\x80\x80\x80\xfc\x84\x80\x80\x80\x80\xfc\x88\x80"
    "\x80\x80\x80\xfc\x90\x80\x80\x80\x80\xfc\xa0\x80\x80\x80\x80"
    "\xfd\x80\x80\x80\x80\x80";

  const wchar_t wstr[] = {
    0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc,
    0xd, 0xe, 0xf, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
    0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, L'!',
    L'"', L'#', L'$', L'%', L'&', L'\'', L'(', L')', L'*', L'+',
    L',', L'-', L'.', L'/', L'0', L'1', L'2', L'3', L'4', L'5',
    L'6', L'7', L'8', L'9', L':', L';', L'<', L'=', L'>', L'?',
    L'@', L'}', L'~', 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85,
    0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
    0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99,
    0x9a, 0x9b, 0x9c, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, 0x100,
    0x101, 0x102, 0x103, 0x104, 0x105, 0x106, 0x107, 0x108, 0x109,
    0x10a, 0x10b, 0x10c, 0x10d, 0x10e, 0x10f, 0x110, 0x111, 0x112,
    0x113, 0x114, 0x115, 0x116, 0x117, 0x118, 0x119, 0x7f8, 0x7f9,
    0x7fa, 0x7fb, 0x7fc, 0x7fd, 0x7fe, 0x7ff, 0x800, 0x801, 0x802,
    0x803, 0x804, 0x805, 0x806, 0x807, 0x808, 0x809, 0x80a, 0x80b,
    0x80c, 0x80d, 0x80e, 0x80f, 0x810, 0x811, 0x812, 0x813, 0x814,
    0x815, 0x816, 0x817, 0x1, 0x2, 0x4, 0x8, 0x10, 0x20, L'@',
    0x80, 0x100, 0x200, 0x400, 0x800, 0x1000, 0x2000, 0x4000, 0x8000,
    0x10000, 0x20000, 0x40000, 0x80000, 0x100000, 0x200000, 0x400000,
    0x800000, 0x1000000, 0x2000000, 0x4000000, 0x8000000, 0x10000000,
    0x20000000, 0x40000000, 0x0
  };

  const size_t clen = sizeof(cstr) / sizeof(cstr[0]);
  const size_t wlen = sizeof(wstr) / sizeof(wstr[0]);

  const int loops = 2 * BUFSIZ / wlen;
  locale loc = __gnu_test::try_named_locale("se_NO.UTF-8");

  FILE* file = fopen(name, "w");
  for (int i = 0; i < loops; ++i)
    fwrite(cstr, 1, clen, file);
  fclose(file);

  wfilebuf fb;
  fb.pubimbue(loc);
  fb.open(name, ios_base::in);

  pos_type p1 = fb.pubseekoff(0, ios_base::cur);
  pos_type end = fb.pubseekoff(0, ios_base::end);
  pos_type beg = fb.pubseekoff(0, ios_base::beg);
  VERIFY( p1 == beg );

  const size_t limit = wlen * loops;
  for (size_t index = 0; index < limit; ++index)
    {
      // Call seekoff at pseudo-random intervals.
      if (index % 5 == 0 || index % 7 == 0)
	{
	  pos_type p2 = fb.pubseekoff(0, ios_base::cur);
	  VERIFY( p2 != pos_type(-1) );
	}
      int_type c1 = fb.sbumpc();
      VERIFY( c1 != eof );
      VERIFY( static_cast<wchar_t>(c1) == wstr[index % wlen] );
    }

  pos_type p3 = fb.pubseekoff(0, ios_base::cur);
  VERIFY( p3 == end );

  int_type c2 = fb.sbumpc();
  VERIFY( c2 == eof );

  fb.close();
}

int main()
{
  test01();
  return 0;
}