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fstream.tcc (basic_filebuf::seekoff): Use codecvt::length to handle variable-width stateless encodings correctly.

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2003-09-10  Petur Runolfsson  <peturr02@ru.is>

	* include/bits/fstream.tcc (basic_filebuf::seekoff):
	Use codecvt::length to handle variable-width stateless encodings
	correctly.
	* testsuite/27_io/basic_filebuf/seekoff/wchar_t/1.cc: New test.
	* testsuite/27_io/basic_filebuf/seekoff/wchar_t/2.cc: New test.

From-SVN: r71271
This commit is contained in:
Petur Runolfsson 2003-09-10 13:43:15 +00:00 committed by Benjamin Kosnik
parent 1c8b4e29cc
commit 8c8dec01e2
4 changed files with 249 additions and 3 deletions
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8
libstdc++-v3/ChangeLog
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@ -1,3 +1,11 @@
2003-09-10 Petur Runolfsson <peturr02@ru.is>
* include/bits/fstream.tcc (basic_filebuf::seekoff):
Use codecvt::length to handle variable-width stateless encodings
correctly.
* testsuite/27_io/basic_filebuf/seekoff/wchar_t/1.cc: New test.
* testsuite/27_io/basic_filebuf/seekoff/wchar_t/2.cc: New test.
2003-09-10 Alan Modra <amodra@bigpond.net.au>
* config/io/basic_file_stdio.cc (_M_open_mode): Assign __p_mode

19
libstdc++-v3/include/bits/fstream.tcc
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@ -593,7 +593,7 @@ namespace std
// Ditch any pback buffers to avoid confusion.
_M_destroy_pback();
off_type __computed_off = __off;
off_type __computed_off = __off * __width;
if (this->pbase() < this->pptr())
{
// Part one: update the output sequence.
@ -603,13 +603,26 @@ namespace std
_M_output_unshift();
}
else if (_M_reading && __way == ios_base::cur)
__computed_off += this->gptr() - this->egptr();
{
if (_M_codecvt->always_noconv())
__computed_off += this->gptr() - this->egptr();
else
{
// Calculate offset from _M_ext_buf that corresponds
// to gptr().
const int __gptr_off =
_M_codecvt->length(_M_state_cur, _M_ext_buf, _M_ext_next,
this->gptr() - this->eback());
__computed_off += _M_ext_buf + __gptr_off - _M_ext_end;
}
}
// Returns pos_type(off_type(-1)) in case of failure.
__ret = _M_file.seekoff(__computed_off * __width, __way, __mode);
__ret = _M_file.seekoff(__computed_off, __way, __mode);
_M_reading = false;
_M_writing = false;
_M_ext_next = _M_ext_end = _M_ext_buf;
_M_set_buffer(-1);
}
_M_last_overflowed = false;

136
libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/1.cc Normal file
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@ -0,0 +1,136 @@
// 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 = 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( 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;
}

89
libstdc++-v3/testsuite/27_io/basic_filebuf/seekoff/wchar_t/2.cc Normal file
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@ -0,0 +1,89 @@
// 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 and
// output.
void test02()
{
using namespace std;
typedef wfilebuf::int_type int_type;
bool test = true;
const char name[] = "tmp_seekoff-2.tst";
locale loc = __gnu_test::try_named_locale("se_NO.UTF-8");
const size_t size = 10;
wchar_t buf[size];
streamsize n;
wfilebuf fb;
fb.pubimbue(loc);
fb.open(name, ios_base::in | ios_base::out | ios_base::trunc);
n = fb.sputn(L"\xa0st", 3);
VERIFY( n == 3 );
fb.pubseekoff(0, ios_base::beg);
n = fb.sgetn(buf, 2);
VERIFY( n == 2 );
VERIFY( !wmemcmp(buf, L"\xa0s", 2) );
fb.pubseekoff(0, ios_base::cur);
n = fb.sputn(L"\xb2R", 2);
VERIFY( n == 2 );
fb.pubseekoff(0, ios_base::beg);
n = fb.sgetn(buf, size);
VERIFY( n == 4 );
VERIFY( !wmemcmp(buf, L"\xa0s\xb2R", 4) );
fb.pubseekoff(0, ios_base::beg);
n = fb.sputn(L"\x90m\x92n\x94", 5);
VERIFY( n == 5 );
fb.pubseekoff(0, ios_base::beg);
n = fb.sgetn(buf, 2);
VERIFY( n == 2 );
VERIFY( !wmemcmp(buf, L"\x90m", 2) );
fb.pubseekoff(0, ios_base::end);
n = fb.sputn(L"I\xbfJ", 3);
VERIFY( n == 3 );
fb.pubseekoff(0, ios_base::beg);
n = fb.sgetn(buf, size);
VERIFY( n == 8 );
VERIFY( !wmemcmp(buf, L"\x90m\x92n\x94I\xbfJ", 8) );
fb.close();
}
int main()
{
test02();
return 0;
}