mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-27 12:15:39 +03:00
0807a262de
A late change in C23, the resolution to CD2 comment GB-108, specified that <inttypes.h> macros such as PRId8 expand to formats such that, when an argument is passed in the promoted type that isn't representable in the original type such as int8_t corresponding to the format, it gets converted to that type before printing. (Previously, the proper handling of such arguments was unclear; the case of direct use of formats such as %hhd was clarified earlier in C23 development, and had been fixed in glibc in 2006.) Implement the change to use formats such as "hhd" for the affected macros, with associated tests. Tested for x86_64 and x86.
94 lines
3.6 KiB
C
94 lines
3.6 KiB
C
/* Test printf PRI* macro narrowing arguments.
|
|
Copyright (C) 2025 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 <inttypes.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include <libc-diag.h>
|
|
#include <support/check.h>
|
|
|
|
#define CHECK_PRINTF(EXPECTED, FMT, ...) \
|
|
do \
|
|
{ \
|
|
int ret = snprintf (buf, sizeof buf, FMT, \
|
|
__VA_ARGS__); \
|
|
TEST_COMPARE_STRING (buf, EXPECTED); \
|
|
TEST_COMPARE (ret, strlen (EXPECTED)); \
|
|
} \
|
|
while (0)
|
|
|
|
_Static_assert (INT_FAST8_WIDTH == 8, "width of int_fast8_t");
|
|
_Static_assert (UINT_FAST8_WIDTH == 8, "width of uint_fast8_t");
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
char buf[1024];
|
|
CHECK_PRINTF ("-121", "%" PRId8, 1234567);
|
|
CHECK_PRINTF ("-121", "%" PRIdLEAST8, 1234567);
|
|
CHECK_PRINTF ("-121", "%" PRIdFAST8, 1234567);
|
|
CHECK_PRINTF ("-10617", "%" PRId16, 1234567);
|
|
CHECK_PRINTF ("-10617", "%" PRIdLEAST16, 1234567);
|
|
CHECK_PRINTF ("-121", "%" PRIi8, 1234567);
|
|
CHECK_PRINTF ("-121", "%" PRIiLEAST8, 1234567);
|
|
CHECK_PRINTF ("-121", "%" PRIiFAST8, 1234567);
|
|
CHECK_PRINTF ("-10617", "%" PRIi16, 1234567);
|
|
CHECK_PRINTF ("-10617", "%" PRIiLEAST16, 1234567);
|
|
CHECK_PRINTF ("207", "%" PRIo8, 1234567);
|
|
CHECK_PRINTF ("207", "%" PRIoLEAST8, 1234567);
|
|
CHECK_PRINTF ("207", "%" PRIoFAST8, 1234567);
|
|
CHECK_PRINTF ("153207", "%" PRIo16, 1234567);
|
|
CHECK_PRINTF ("153207", "%" PRIoLEAST16, 1234567);
|
|
CHECK_PRINTF ("135", "%" PRIu8, 1234567);
|
|
CHECK_PRINTF ("135", "%" PRIuLEAST8, 1234567);
|
|
CHECK_PRINTF ("135", "%" PRIuFAST8, 1234567);
|
|
CHECK_PRINTF ("54919", "%" PRIu16, 1234567);
|
|
CHECK_PRINTF ("54919", "%" PRIuLEAST16, 1234567);
|
|
CHECK_PRINTF ("87", "%" PRIx8, 1234567);
|
|
CHECK_PRINTF ("87", "%" PRIxLEAST8, 1234567);
|
|
CHECK_PRINTF ("87", "%" PRIxFAST8, 1234567);
|
|
CHECK_PRINTF ("d687", "%" PRIx16, 1234567);
|
|
CHECK_PRINTF ("d687", "%" PRIxLEAST16, 1234567);
|
|
CHECK_PRINTF ("87", "%" PRIX8, 1234567);
|
|
CHECK_PRINTF ("87", "%" PRIXLEAST8, 1234567);
|
|
CHECK_PRINTF ("87", "%" PRIXFAST8, 1234567);
|
|
CHECK_PRINTF ("D687", "%" PRIX16, 1234567);
|
|
CHECK_PRINTF ("D687", "%" PRIXLEAST16, 1234567);
|
|
/* GCC does not know the %b or %B formats before GCC 12. */
|
|
DIAG_PUSH_NEEDS_COMMENT;
|
|
#if !__GNUC_PREREQ (12, 0)
|
|
DIAG_IGNORE_NEEDS_COMMENT (11, "-Wformat");
|
|
DIAG_IGNORE_NEEDS_COMMENT (11, "-Wformat-extra-args");
|
|
#endif
|
|
CHECK_PRINTF ("10000111", "%" PRIb8, 1234567);
|
|
CHECK_PRINTF ("10000111", "%" PRIbLEAST8, 1234567);
|
|
CHECK_PRINTF ("10000111", "%" PRIbFAST8, 1234567);
|
|
CHECK_PRINTF ("1101011010000111", "%" PRIb16, 1234567);
|
|
CHECK_PRINTF ("1101011010000111", "%" PRIbLEAST16, 1234567);
|
|
CHECK_PRINTF ("10000111", "%" PRIB8, 1234567);
|
|
CHECK_PRINTF ("10000111", "%" PRIBLEAST8, 1234567);
|
|
CHECK_PRINTF ("10000111", "%" PRIBFAST8, 1234567);
|
|
CHECK_PRINTF ("1101011010000111", "%" PRIB16, 1234567);
|
|
CHECK_PRINTF ("1101011010000111", "%" PRIBLEAST16, 1234567);
|
|
DIAG_POP_NEEDS_COMMENT;
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|