vsprintf.c

来自「minix操作系统最新版本（3.1.1）的源代码」· C语言 代码 · 共 35 行

/*
 * vsprintf - print formatted output without ellipsis on an array
 */
/* $Header: /cvsup/minix/src/lib/stdio/vsprintf.c,v 1.1.1.1 2005/04/21 14:56:36 beng Exp $ */

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

int
vsnprintf(char *s, size_t n, const char *format, va_list arg)
{
	int retval;
	FILE tmp_stream;

	tmp_stream._fd     = -1;
	tmp_stream._flags  = _IOWRITE + _IONBF + _IOWRITING;
	tmp_stream._buf    = (unsigned char *) s;
	tmp_stream._ptr    = (unsigned char *) s;
	tmp_stream._count  = n-1;

	retval = _doprnt(format, arg, &tmp_stream);
	tmp_stream._count  = 1;
	putc('\0',&tmp_stream);

	return retval;
}

int
vsprintf(char *s, const char *format, va_list arg)
{
	return vsnprintf(s, INT_MAX, format, arg);
}