Ultrix-3.1/src/libc/sysV/toupper.c

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/**********************************************************************
 *   Copyright (c) Digital Equipment Corporation 1984, 1985, 1986.    *
 *   All Rights Reserved. 					      *
 *   Reference "/usr/src/COPYRIGHT" for applicable restrictions.      *
 **********************************************************************/

/*	SCCSID: @(#)toupper.c	3.0	4/22/86	*/
/*	(System 5)	1.2	*/
/*	3.0 SID #	1.2	*/
/*LINTLIBRARY*/
/*
 * If arg is lower-case, return upper-case, otherwise return arg.
 */

int
toupper(c)
register int c;
{
	if(c >= 'a' && c <= 'z')
		c += 'A' - 'a';
	return(c);
}