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From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.std.c
Subject: Re: Hexadecimal Escape Sequence
Message-ID: <11960@smoke.BRL.MIL>
Date: 16 Jan 90 11:25:04 GMT
References: <1335@cybaswan.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 18

In article <1335@cybaswan.UUCP> iiitsh@cybaswan.UUCP (Steve Hosgood) writes:
>	printf("\x1bfred");	/* i.e "<ESC>fred" */
>... It seems that an infinite number of hex characters may follow the
>\x sequence, though what happens if the result fails to fit in a char is
>undefined.
>Is this what you'd call "expected behaviour"?

It's what I would expect.  Two hex digits is not always enough.

>After all, the octal escape sequence limits itself to 3 characters...

That's a deficiency in the octal escape sequence design that we were
able to remedy for the newly invented hex sequences.

>If it IS correct, how do you write "<ESC>fred" using a hex escape?

The simplest method is to use string concatenation:
	printf("\x1b""fred");