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glibc/libio/tst-fseek.c
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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" |