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/*
* Copyright (c) 1995-1996 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit 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 GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Mach Operating System
* Copyright (c) 1993 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* File: sscanf.c
* Author: Alessandro Forin, Carnegie Mellon University
* Date: 3/93
*
* Parse trivially simple strings
*/
#include <stdlib.h>
#include <stdarg.h>
#include <ctype.h>
#include "doscan.h"
typedef int boolean_t;
/*
* All I need is a miracle ...
* to keep this from growing like all the other sscanf!
*/
int
_doscan(const unsigned char *fmt, va_list vp,
int (*getc)(void *getc_arg),
void (*ungetc)(int c, void *getc_arg),
void *getc_arg)
{
register int c;
boolean_t neg;
boolean_t discard;
int vals = 0;
while ((c = *fmt++) != 0) {
if (c != '%') {
if (isspace(c))
{
while (isspace(c = getc(getc_arg)));
ungetc(c, getc_arg);
continue;
}
else if (c == getc(getc_arg))
continue;
else
break; /* mismatch */
}
discard = 0;
more_fmt:
c = *fmt++;
switch (c) {
case 'd':
{
long n = 0;
c = getc(getc_arg);
neg = c == '-';
if (neg) c = getc(getc_arg);
while (c >= '0' && c <= '9') {
n = n * 10 + (c - '0');
c = getc(getc_arg);
}
ungetc(c, getc_arg);
if (neg) n = -n;
/* done, store it away */
if (!discard)
{
int *p = va_arg(vp, int *);
*p = n;
}
break;
}
case 'x':
{
long n = 0;
c = getc(getc_arg);
neg = c == '-';
if (neg) c = getc(getc_arg);
while (1)
{
if ((c >= '0') && (c <= '9'))
n = n * 16 + (c - '0');
else if ((c >= 'a') && (c <= 'f'))
n = n * 16 + (c - 'a' + 10);
else if ((c >= 'A') && (c <= 'F'))
n = n * 16 + (c - 'A' + 10);
else
break;
c = getc(getc_arg);
}
ungetc(c, getc_arg); /* retract lookahead */
if (neg) n = -n;
/* done, store it away */
if (!discard)
{
int *p = va_arg(vp, int *);
*p = n;
}
break;
}
case 's':
{
char *buf = NULL;
if (!discard)
buf = va_arg(vp, char *);
c = getc(getc_arg);
while (!isspace(c))
{
if (!discard)
*buf++ = c;
c = getc(getc_arg);
}
ungetc(c, getc_arg); /* retract lookahead */
if (!discard)
*buf = 0;
break;
}
case '*':
discard = 1;
goto more_fmt;
default:
break;
}
if (!discard)
vals++;
}
return vals;
}
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