snprintf.c

网络时间协议NTP 源码 版本v4.2.0b 该源码用于linux平台下

#include <config.h>

#if !HAVE_SNPRINTF
#include <sys/types.h>

#ifdef __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <stdio.h>

#include "l_stdlib.h"

#ifdef __STDC__
int snprintf(char *str, size_t n, const char *fmt, ...)
#else
int snprintf(str, n, fmt, va_alist)
	char *str;
	size_t n;
	const char *fmt;
	va_dcl
#endif
{
	va_list ap;
	int rval;
#ifdef VSPRINTF_CHARSTAR
	char *rp;
#endif
#ifdef __STDC__
	va_start(ap, fmt);
#else
	va_start(ap);
#endif
#ifdef VSPRINTF_CHARSTAR
	rp = vsprintf(str, fmt, ap);
	va_end(ap);
	return (strlen(rp));
#else
	rval = vsprintf(str, fmt, ap);
	va_end(ap);
	return (rval);
#endif
}

int
vsnprintf(
	char *str,
	size_t n,
	const char *fmt,
	va_list ap
	)
{
#ifdef VSPRINTF_CHARSTAR
	return (strlen(vsprintf(str, fmt, ap)));
#else
	return (vsprintf(str, fmt, ap));
#endif
}
#else
int snprintf_bs;
#endif