108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/* Verify that ftell does not go into an infinite loop when a conversion fails
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due to insufficient space in the buffer.
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Copyright (C) 2014-2018 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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<http://www.gnu.org/licenses/>. */
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#include <wchar.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <locale.h>
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#include <errno.h>
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#include <unistd.h>
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static int do_test (void);
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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/* Arbitrary number large enough so that the target buffer during conversion is
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not large enough. */
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#define STRING_SIZE (1400)
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#define NSTRINGS (2)
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static int
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do_test (void)
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{
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FILE *fp = NULL;
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wchar_t *inputs[NSTRINGS] = {NULL};
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int ret = 1;
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if (setlocale (LC_ALL, "en_US.UTF-8") == NULL)
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{
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printf ("Cannot set en_US.UTF-8 locale.\n");
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goto out;
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}
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/* Generate input from one character, chosen because it has an odd number of
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bytes in UTF-8, making it easier to reproduce the problem:
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NAME Hiragana letter GO
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CHAR ご
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UTF-8 E38194
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UCS 3054
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MARC-8 692434 */
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wchar_t seed = L'ご';
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for (int i = 0; i < NSTRINGS; i++)
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{
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inputs[i] = malloc (STRING_SIZE * sizeof (wchar_t));
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if (inputs[i] == NULL)
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{
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printf ("Failed to allocate memory for inputs: %m\n");
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goto out;
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}
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wmemset (inputs[i], seed, STRING_SIZE - 1);
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inputs[i][STRING_SIZE - 1] = L'\0';
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}
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char *filename;
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int fd = create_temp_file ("tst-fseek-wide-partial.out", &filename);
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if (fd == -1)
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{
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printf ("create_temp_file: %m\n");
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goto out;
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}
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fp = fdopen (fd, "w+");
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if (fp == NULL)
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{
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printf ("fopen: %m\n");
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close (fd);
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goto out;
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}
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for (int i = 0; i < NSTRINGS; i++)
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{
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printf ("offset: %ld\n", ftell (fp));
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if (fputws (inputs[i], fp) == -1)
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{
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perror ("fputws");
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goto out;
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}
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}
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ret = 0;
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out:
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if (fp != NULL)
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fclose (fp);
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for (int i = 0; i < NSTRINGS; i++)
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free (inputs[i]);
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return ret;
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}
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