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From: lum@osu-eddie.UUCP (Lum Johnson)
Newsgroups: net.lang.c
Subject: Re: C programming hint
Message-ID: <475@osu-eddie.UUCP>
Date: Fri, 19-Jul-85 11:18:43 EDT
Article-I.D.: osu-eddi.475
Posted: Fri Jul 19 11:18:43 1985
Date-Received: Sun, 21-Jul-85 23:07:10 EDT
References: <899@teddy.UUCP> <2412@sun.uucp> <913@teddy.UUCP>
Reply-To: lum@osu-eddie.UUCP (Lum Johnson)
Distribution: net
Organization: Ohio State Univ., CIS Dept., Cols, Oh.
Lines: 21

In article <913@teddy.UUCP> kps@teddy.UUCP writes:
>
>	char blanks[SIZE];
>	blanks[0] = ' ';
>	strncpy(blanks + 1, blanks, SIZE - 1);	/* initialize entire array */
>
> ... I've been bludgeoned to death with the fact that my method is
> implementation dependent and that it won't work all the time.

This actually works in assembly language for the PDP-10.

	movei t1," "		; put <SPACE> in reg
	movem t1,blanks		; deposit char in buffer
	move t1,[blanks,,blanks+1] ; control register for blt
	blt t1,blanks+size	; propagate char over buffer

The BLT iterates the copy-previous-char operation (specified in t1),
incrementing both halves of the control register (t1) until
blanks+size is reached.

Lum Johnson ..!cbosgd!osu-eddie!lum or lum@osu-eddie.uucp