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/* __gmp_sscanf_funs -- support for formatted input from a string.
THE FUNCTIONS IN THIS FILE ARE FOR INTERNAL USE ONLY. THEY'RE ALMOST
CERTAIN TO BE SUBJECT TO INCOMPATIBLE CHANGES OR DISAPPEAR COMPLETELY IN
FUTURE GNU MP RELEASES.
Copyright 2001-2003, 2009 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP 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 3 of the License, or (at
your option) any later version.
The GNU MP 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 MP Library. If not, see https://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdarg.h>
#include "gmp.h"
#include "gmp-impl.h"
#if 0
static int
scan (const char **sp, const char *fmt, ...)
{
va_list ap;
int ret;
va_start(ap, fmt);
ret = vsscanf(*sp, fmt, ap);
va_end(ap);
return ret;
}
#else
static int
scan (const char **sp, const char *fmt, ...)
{
va_list ap;
void *p1, *p2;
int ret;
va_start (ap, fmt);
p1 = va_arg (ap, void *);
p2 = va_arg (ap, void *);
ret = sscanf (*sp, fmt, p1, p2);
va_end (ap);
return ret;
}
#endif
static void
step (const char **sp, int n)
{
ASSERT (n >= 0);
/* shouldn't push us past the end of the string */
#if WANT_ASSERT
{
int i;
for (i = 0; i < n; i++)
ASSERT ((*sp)[i] != '\0');
}
#endif
(*sp) += n;
}
static int
get (const char **sp)
{
const char *s;
int c;
s = *sp;
c = (unsigned char) *s++;
if (c == '\0')
return EOF;
*sp = s;
return c;
}
static void
unget (int c, const char **sp)
{
const char *s;
s = *sp;
if (c == EOF)
{
ASSERT (*s == '\0');
return;
}
s--;
ASSERT ((unsigned char) *s == c);
*sp = s;
}
const struct gmp_doscan_funs_t __gmp_sscanf_funs = {
(gmp_doscan_scan_t) scan,
(gmp_doscan_step_t) step,
(gmp_doscan_get_t) get,
(gmp_doscan_unget_t) unget,
};
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