170 lines
3.5 KiB
C
170 lines
3.5 KiB
C
/* Verify that fseek/ftell combination works for wide chars.
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Copyright (C) 2012-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <locale.h>
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#include <errno.h>
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#include <wchar.h>
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#include <unistd.h>
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#include <string.h>
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#include <support/temp_file.h>
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static int
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do_seek_end (FILE *fp)
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{
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long save;
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if (fputws (L"abc\n", fp) == -1)
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{
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printf ("do_seek_end: fputws: %s\n", strerror (errno));
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return 1;
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}
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save = ftell (fp);
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rewind (fp);
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if (fseek (fp, 0, SEEK_END) == -1)
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{
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printf ("do_seek_end: fseek: %s\n", strerror (errno));
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return 1;
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}
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if (save != ftell (fp))
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{
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printf ("save = %ld, ftell = %ld\n", save, ftell (fp));
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return 1;
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}
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return 0;
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}
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int
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do_seek_set (FILE *fp)
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{
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long save1, save2;
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if (fputws (L"ゅう\n", fp) == -1)
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{
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printf ("seek_set: fputws(1): %s\n", strerror (errno));
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return 1;
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}
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save1 = ftell (fp);
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if (fputws (L"ゅう\n", fp) == -1)
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{
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printf ("seek_set: fputws(2): %s\n", strerror (errno));
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return 1;
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}
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save2 = ftell (fp);
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if (fputws (L"ゅう\n", fp) == -1)
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{
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printf ("seek_set: fputws(3): %s\n", strerror (errno));
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return 1;
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}
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if (fseek (fp, save1, SEEK_SET) == -1)
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{
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printf ("seek_set: fseek(1): %s\n", strerror (errno));
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return 1;
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}
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if (save1 != ftell (fp))
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{
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printf ("save1 = %ld, ftell = %ld\n", save1, ftell (fp));
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return 1;
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}
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if (fseek (fp, save2, SEEK_SET) == -1)
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{
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printf ("seek_set: fseek(2): %s\n", strerror (errno));
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return 1;
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}
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if (save2 != ftell (fp))
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{
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printf ("save2 = %ld, ftell = %ld\n", save2, ftell (fp));
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return 1;
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}
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return 0;
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}
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static int
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do_test (void)
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{
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if (setlocale (LC_ALL, "ja_JP.UTF-8") == NULL)
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{
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printf ("Cannot set ja_JP.UTF-8 locale.\n");
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exit (1);
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}
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/* Retain messages in English. */
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if (setlocale (LC_MESSAGES, "en_US.ISO-8859-1") == NULL)
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{
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printf ("Cannot set LC_MESSAGES to en_US.ISO-8859-1 locale.\n");
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exit (1);
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}
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int ret = 0;
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char *filename;
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int fd = create_temp_file ("tst-fseek.out", &filename);
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if (fd == -1)
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return 1;
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FILE *fp = fdopen (fd, "w+");
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if (fp == NULL)
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{
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printf ("seek_set: fopen: %s\n", strerror (errno));
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close (fd);
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return 1;
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}
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if (do_seek_set (fp))
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{
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printf ("SEEK_SET test failed\n");
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ret = 1;
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}
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/* Reopen the file. */
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fclose (fp);
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fp = fopen (filename, "w+");
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if (fp == NULL)
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{
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printf ("seek_end: fopen: %s\n", strerror (errno));
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return 1;
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}
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if (do_seek_end (fp))
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{
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printf ("SEEK_END test failed\n");
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ret = 1;
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}
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fclose (fp);
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return ret;
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}
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#include <support/test-driver.c>
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