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/* Verify that fseek/ftell combination works for wide chars.
Copyright (C) 2012-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include <stdlib.h>
#include <locale.h>
#include <errno.h>
#include <wchar.h>
#include <unistd.h>
#include <string.h>
/* Defined in test-skeleton.c. */
static int create_temp_file (const char *base, char **filename);
static int
do_seek_end (FILE *fp)
{
long save;
if (fputws (L"abc\n", fp) == -1)
{
printf ("do_seek_end: fputws: %s\n", strerror (errno));
return 1;
}
save = ftell (fp);
rewind (fp);
if (fseek (fp, 0, SEEK_END) == -1)
{
printf ("do_seek_end: fseek: %s\n", strerror (errno));
return 1;
}
if (save != ftell (fp))
{
printf ("save = %ld, ftell = %ld\n", save, ftell (fp));
return 1;
}
return 0;
}
int
do_seek_set (FILE *fp)
{
long save1, save2;
if (fputws (L"ゅう\n", fp) == -1)
{
printf ("seek_set: fputws(1): %s\n", strerror (errno));
return 1;
}
save1 = ftell (fp);
if (fputws (L"ゅう\n", fp) == -1)
{
printf ("seek_set: fputws(2): %s\n", strerror (errno));
return 1;
}
save2 = ftell (fp);
if (fputws (L"ゅう\n", fp) == -1)
{
printf ("seek_set: fputws(3): %s\n", strerror (errno));
return 1;
}
if (fseek (fp, save1, SEEK_SET) == -1)
{
printf ("seek_set: fseek(1): %s\n", strerror (errno));
return 1;
}
if (save1 != ftell (fp))
{
printf ("save1 = %ld, ftell = %ld\n", save1, ftell (fp));
return 1;
}
if (fseek (fp, save2, SEEK_SET) == -1)
{
printf ("seek_set: fseek(2): %s\n", strerror (errno));
return 1;
}
if (save2 != ftell (fp))
{
printf ("save2 = %ld, ftell = %ld\n", save2, ftell (fp));
return 1;
}
return 0;
}
static int
do_test (void)
{
if (setlocale (LC_ALL, "ja_JP.UTF-8") == NULL)
{
printf ("Cannot set ja_JP.UTF-8 locale.\n");
exit (1);
}
/* Retain messages in English. */
if (setlocale (LC_MESSAGES, "en_US.ISO-8859-1") == NULL)
{
printf ("Cannot set LC_MESSAGES to en_US.ISO-8859-1 locale.\n");
exit (1);
}
int ret = 0;
char *filename;
int fd = create_temp_file ("tst-fseek.out", &filename);
if (fd == -1)
return 1;
FILE *fp = fdopen (fd, "w+");
if (fp == NULL)
{
printf ("seek_set: fopen: %s\n", strerror (errno));
close (fd);
return 1;
}
if (do_seek_set (fp))
{
printf ("SEEK_SET test failed\n");
ret = 1;
}
/* Reopen the file. */
fclose (fp);
fp = fopen (filename, "w+");
if (fp == NULL)
{
printf ("seek_end: fopen: %s\n", strerror (errno));
return 1;
}
if (do_seek_end (fp))
{
printf ("SEEK_END test failed\n");
ret = 1;
}
fclose (fp);
return ret;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
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