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/* Test feature wrapper for formatted 'vsscanf' 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 <stdarg.h>
#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);
}
static int
scanf_under_test (const char *restrict fmt, ...)
{
size_t i = 0;
va_list ap;
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;
}
va_start (ap, fmt);
result = vsscanf (sscanf_buf, fmt, ap);
va_end (ap);
if (result == EOF)
result = INPUT_EOF;
out:
return result;
}
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