88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
/* __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, 2002 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 2.1 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; see the file COPYING.LIB. If not, write to
|
|
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, USA. */
|
|
|
|
#include <stdio.h>
|
|
#include "gmp.h"
|
|
#include "gmp-impl.h"
|
|
|
|
|
|
static int
|
|
scan (const char **sp, const char *fmt, void *p1, void *p2)
|
|
{
|
|
return sscanf (*sp, fmt, p1, p2);
|
|
}
|
|
|
|
static void
|
|
step (const char **sp, int n)
|
|
{
|
|
ASSERT (n >= 0);
|
|
|
|
/* shouldn't push us past the 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,
|
|
};
|