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/* Test feature wrapper for formatted 'sprintf' output.
Copyright (C) 2024 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 <stdio.h>
#include <stdlib.h>
#include <support/next_to_fault.h>
#define SPRINTF_BUFFER_SIZE 65536
static struct support_next_to_fault ntf;
#define PREPARE printf_under_test_init
static void
printf_under_test_init (int argc, char **argv)
{
ntf = support_next_to_fault_allocate (SPRINTF_BUFFER_SIZE);
}
static void __attribute__ ((destructor))
printf_under_test_fini (void)
{
support_next_to_fault_free (&ntf);
}
#define printf_under_test(...) \
({ \
__label__ out; \
char *str = ntf.buffer; \
int result; \
\
result = sprintf (str, __VA_ARGS__); \
if (result < 0) \
{ \
perror ("sprintf"); \
goto out; \
} \
if (fwrite (str, sizeof (*str), result, stdout) != result) \
{ \
perror ("fwrite"); \
result = -1; \
} \
out: \
result; \
})
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