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b6d8a999cd
On big endian systems the test fails with:
tst-bz24153.c:88: numeric comparison failure
left: 1660944385 (0x63000001); from: ch
right: 99 (0x63); from: L'c'
tst-bz24153.c:90: numeric comparison failure
left: 1677721601 (0x64000001); from: ch
right: 100 (0x64); from: L'd'
error: 2 test failures
One 'char' ("%c") is stored to the 'wchar_t *':
ch = 0x00000001 | 0x63000000
This patch is using "%lc" as format specifier to read a wchar_t.
ChangeLog:
* libio/tst-bz24153.c (wide): Use wide char format specifier.
115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
/* Test that assigning to stdin redirects input (bug 24153).
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Copyright (C) 2019 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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/* Prevent getchar -> getc inline expansion. */
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#define __NO_INLINE__
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#pragma GCC optimize ("O0")
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#include <stdarg.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 <support/check.h>
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#include <support/temp_file.h>
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#include <support/xstdio.h>
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#include <support/xunistd.h>
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#include <wchar.h>
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static int
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call_vscanf (const char *format, ...)
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{
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va_list ap;
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va_start (ap, format);
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int ret = vscanf (format, ap);
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va_end (ap);
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return ret;
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}
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static int
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call_vwscanf (const wchar_t *format, ...)
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{
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va_list ap;
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va_start (ap, format);
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int ret = vwscanf (format, ap);
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va_end (ap);
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return ret;
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}
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static void
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narrow (const char *path)
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{
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FILE *old_stdin = stdin;
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stdin = xfopen (path, "r");
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TEST_COMPARE (getchar (), 'a');
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TEST_COMPARE (getchar_unlocked (), 'b');
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char ch = 1;
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TEST_COMPARE (scanf ("%c", &ch), 1);
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TEST_COMPARE (ch, 'c');
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TEST_COMPARE (call_vscanf ("%c", &ch), 1);
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TEST_COMPARE (ch, 'd');
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char buf[8];
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memset (buf, 'X', sizeof (buf));
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/* Legacy interface. */
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extern char *gets (char *);
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TEST_VERIFY (gets (buf) == buf);
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TEST_COMPARE_BLOB (buf, sizeof (buf), "ef\0XXXXX", sizeof (buf));
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fclose (stdin);
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stdin = old_stdin;
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}
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static void
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wide (const char *path)
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{
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FILE *old_stdin = stdin;
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stdin = xfopen (path, "r");
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TEST_COMPARE (getwchar (), L'a');
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TEST_COMPARE (getwchar_unlocked (), L'b');
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wchar_t ch = 1;
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TEST_COMPARE (wscanf (L"%lc", &ch), 1);
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TEST_COMPARE (ch, L'c');
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TEST_COMPARE (call_vwscanf (L"%lc", &ch), 1);
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TEST_COMPARE (ch, L'd');
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fclose (stdin);
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stdin = old_stdin;
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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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char *path;
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{
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int fd = create_temp_file ("tst-bz24153-", &path);
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TEST_VERIFY_EXIT (fd >= 0);
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xwrite (fd, "abcdef", strlen ("abcdef"));
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xclose (fd);
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}
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narrow (path);
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wide (path);
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free (path);
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return 0;
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}
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#include <support/test-driver.c>
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