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/* Test feature wrapper for formatted 'sscanf' input.
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 <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <support/support.h>
static char *sscanf_buf;
static size_t sscanf_buf_size;
static void __attribute__ ((destructor))
scanf_under_test_fini (void)
{
free (sscanf_buf);
}
#define scanf_under_test(...) \
({ \
__label__ out; \
size_t i = 0; \
int result; \
int ch; \
\
do \
{ \
ch = read_input (); \
if (ch < 0) \
{ \
result = ch; \
goto out; \
} \
if (i == sscanf_buf_size) \
{ \
sscanf_buf_size += SIZE_CHUNK; \
/* Add an extra byte for the terminating null character. */ \
sscanf_buf = xrealloc (sscanf_buf, sscanf_buf_size + 1); \
} \
sscanf_buf[i++] = ch; \
} \
while (ch != ':'); \
sscanf_buf[i++] = '\0'; \
\
ch = ungetc (ch, stdin); \
if (ch == EOF) \
{ \
result = INPUT_ERROR; \
goto out; \
} \
\
result = sscanf (sscanf_buf, __VA_ARGS__); \
if (result == EOF) \
result = INPUT_EOF; \
\
out: \
result; \
})
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