Re: Which characters are legal in a string?

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From: Chris Flatters
Date: Tue, 27 Oct 1992 17:05

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In article 1cibc0INNpjq@darkstar.UCSC.EDU, sla@umbra.ucsc.edu (Steve Allen) writes:
>I am looking through the NOST 100-0.3b standard document trying to be
>very sure about one point:
>
>    Section 5.3.2.1 specifies that a "character string shall be composed
>    only of ASCII text."
>
>    Section 6.1 specifies that characters shall be 7-bit ASCII
>
>These specifications do not preclude the existence of unprintable characters
>(ASCII 0 through 31 and 127) in a character string.  Is it intended that
>unprintable characters be legal?  Are there FITS readers which will be
>confounded by unprintables?

Many C and C++ based readers will have problems with ASCII 0 in character
strings.  Many FORTRAN readers will also have problems on Unix systems (the
Fortran RTL often uses C standard library functions that attach a special
meaning to character zero).

	Chris Flatters
	cflatter@nrao.edu

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From: cflatter@nrao.edu (Chris Flatters)
Subject: Re: Which characters are legal in a string?
Message-ID: <1992Oct27.170501.2980@nrao.edu>
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Date: Tue, 27 Oct 1992 17:05:01 GMT
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