vsscanf.c

来自「操作系统源代码」· C语言 代码 · 共 22 行

/*
 * vsscanf - read formatted output from a string
 */

#include	<stdio.h>
#include	<stdarg.h>
#include	<string.h>
#include	"loc_incl.h"

int vsscanf(const char *s, const char *format, va_list ap)
{
	FILE tmp_stream;

	tmp_stream._fd     = -1;
	tmp_stream._flags  = _IOREAD + _IONBF + _IOREADING;
	tmp_stream._buf    = (unsigned char *) s;
	tmp_stream._ptr    = (unsigned char *) s;
	tmp_stream._count  = strlen(s);

	return _doscan(&tmp_stream, format, ap);
}