sscanf.c

来自「基于4个mips核的noc设计」· C语言 代码 · 共 52 行

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "local.h"
#include "shared_libc.h"

/* ARGSUSED */
static
int
eofread(void *cookie, char *buf, int len)
{
	return 0;
}

int
sscanf(const char *s, const char *format, ...)
{
	int ret;
	va_list ap;
	FILE f;

	f._flags = __SRD;
	f._bf._base = f._p = (unsigned char *)s;
	f._bf._size = f._r = strlen(s);
	f._read = eofread;
	f._ub._base = NULL;
	f._lb._base = NULL;
	va_start(ap, format);
        EXCL_START(&stdin->_file_lock);
	ret = __svfscanf(&f, format, ap);
        EXCL_END(&stdin->_file_lock);
	va_end(ap);
	return ret;
}