lvm2/lib/misc/lvm-string.h

/*
 * Copyright (C) 2001 Sistina Software (UK) Limited.
 *
 * This file is released under the LGPL.
 */

#ifndef _LVM_STRING_H
#define _LVM_STRING_H

#include <stdio.h>
#include <stdarg.h>

/*
 * On error, up to glibc 2.0.6, snprintf returned -1 if buffer was too small;
 * From glibc 2.1 it returns number of chars (excl. trailing null) that would 
 * have been written had there been room.
 *
 * lvm_snprintf reverts to the old behaviour.
 */
static inline int lvm_snprintf(char *buf, size_t bufsize, 
			       const char *format, ...)
{
	int n;
	va_list ap;

	va_start(ap, format);
	n = vsnprintf(buf, bufsize, format, ap);
	va_end(ap);

	if (n < 0 || (n > bufsize - 1))
		return -1;

	return n;
}

#endif