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61 lines
1.7 KiB
C
61 lines
1.7 KiB
C
/* Test feature wrapper for formatted 'snprintf' output.
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Copyright (C) 2024-2025 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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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <support/next_to_fault.h>
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#define SPRINTF_BUFFER_SIZE 65536
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static struct support_next_to_fault ntf;
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#define PREPARE printf_under_test_init
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static void
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printf_under_test_init (int argc, char **argv)
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{
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ntf = support_next_to_fault_allocate (SPRINTF_BUFFER_SIZE);
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}
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static void __attribute__ ((destructor))
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printf_under_test_fini (void)
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{
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support_next_to_fault_free (&ntf);
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}
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#define printf_under_test(...) \
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({ \
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__label__ out; \
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char *str = ntf.buffer; \
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int result; \
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\
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result = snprintf (str, ntf.length, __VA_ARGS__); \
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if (result < 0) \
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{ \
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perror ("snprintf"); \
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goto out; \
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} \
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if (fwrite (str, sizeof (*str), result, stdout) != result) \
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{ \
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perror ("fwrite"); \
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result = -1; \
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} \
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out: \
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result; \
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})
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