UninterpretedBytes.st
author claus
Fri, 25 Feb 1994 14:07:09 +0100
changeset 63 1f0cdefb013f
parent 3 24d81bf47225
child 68 59faa75185ba
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"
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 COPYRIGHT (c) 1993 by Claus Gittinger
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              All Rights Reserved
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 This software is furnished under a license and may be used
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 only in accordance with the terms of that license and with the
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 inclusion of the above copyright notice.   This software may not
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 be provided or otherwise made available to, or used by, any
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 other person.  No title to or ownership of the software is
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 hereby transferred.
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"
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ByteArray subclass:#UninterpretedBytes
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       instanceVariableNames:''
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       classVariableNames:''
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       poolDictionaries:''
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       category:'System-Support'
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!
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UninterpretedBytes comment:'
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COPYRIGHT (c) 1993 by Claus Gittinger
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              All Rights Reserved
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this class has been added for ST-80 compatibility.
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$Header: /cvs/stx/stx/libbasic/UninterpretedBytes.st,v 1.4 1994-02-25 13:06:59 claus Exp $
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'!
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!UninterpretedBytes class methodsFor:'queries'!
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isBigEndian
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    "return true, if words/shorts store the most-significant
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     byte last. I.e. true if LSB-first (vax, intel), 
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     false if MSB-first (m68k, sun)."
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%{  /* NOCONTEXT */
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    /*
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     * I dont like ifdefs - you always forget some ...
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     * therefore we look into a structure at run-time
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     */
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    union {
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        unsigned int   u_l;
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        char           u_c[sizeof(int)];
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    } u;
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    u.u_l = 0x87654321;
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    if (u.u_c[0] == 0x21) RETURN (true);
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    RETURN (false );
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%}
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    "UninterpretedBytes isBigEndian"
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! !