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/* Verify that ftell does not go into an infinite loop when a conversion fails
due to insufficient space in the buffer.
Copyright (C) 2014-2023 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
<https://www.gnu.org/licenses/>. */
#include <wchar.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <errno.h>
#include <unistd.h>
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
/* Arbitrary number large enough so that the target buffer during conversion is
not large enough. */
#define STRING_SIZE (1400)
#define NSTRINGS (2)
static int
do_test (void)
{
FILE *fp = NULL;
wchar_t *inputs[NSTRINGS] = {NULL};
int ret = 1;
if (setlocale (LC_ALL, "en_US.UTF-8") == NULL)
{
printf ("Cannot set en_US.UTF-8 locale.\n");
goto out;
}
/* Generate input from one character, chosen because it has an odd number of
bytes in UTF-8, making it easier to reproduce the problem:
NAME Hiragana letter GO
CHAR ご
UTF-8 E38194
UCS 3054
MARC-8 692434 */
wchar_t seed = L'ご';
for (int i = 0; i < NSTRINGS; i++)
{
inputs[i] = malloc (STRING_SIZE * sizeof (wchar_t));
if (inputs[i] == NULL)
{
printf ("Failed to allocate memory for inputs: %m\n");
goto out;
}
wmemset (inputs[i], seed, STRING_SIZE - 1);
inputs[i][STRING_SIZE - 1] = L'\0';
}
char *filename;
int fd = create_temp_file ("tst-fseek-wide-partial.out", &filename);
if (fd == -1)
{
printf ("create_temp_file: %m\n");
goto out;
}
fp = fdopen (fd, "w+");
if (fp == NULL)
{
printf ("fopen: %m\n");
close (fd);
goto out;
}
for (int i = 0; i < NSTRINGS; i++)
{
printf ("offset: %ld\n", ftell (fp));
if (fputws (inputs[i], fp) == -1)
{
perror ("fputws");
goto out;
}
}
ret = 0;
out:
if (fp != NULL)
fclose (fp);
for (int i = 0; i < NSTRINGS; i++)
free (inputs[i]);
return ret;
}
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