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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">We are in heavy grey zone here
</span><span lang="EN-US" style="font-size:11.0pt;font-family:"Apple Color Emoji";mso-fareast-language:EN-US">😊</span><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">First, Oberon-07 does not define any character set. Whether the compiler internally uses US-ASCII, EBCDIC, ISO-5428 (Greek) is not defined by Oberon-07<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">We only know that CHR and ORD are opposite function and ORD returns an INTEGER. Oberon-07 does not define the size of an INTEGER, so we don’t know how many characters
we have. It’s up to the compiler<br>
US-ASCII: ORD(“M”) = 041H<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">EBCDIC: ORD(“M”) = 0D4H<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">ISO-5428: ORD(“M”) = 04FH<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">The only thing in Oberon-07 we know for sure: ch = CHR(ORD(ch))<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Second, what is the definition of CAP?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Does CAP() only convert (so the input is a small letter) or does it check as well?<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Let’s assume you want to program a module Strings.Cap(s). Do you write:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">i := 0; WHILE s[i] # 0X DO s[i] := CAP(s[i]); INC(i) END;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">or do you write<br>
i := 0; WHILE s[i] # 0X DO IF (“a” <= s[i]) AND (s[i] <= “z”) THEN s[i] := CAP(s[i]) END; INC(i) END;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">br<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US">Jörg<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-size:12.0pt;color:black">Von:
</span></b><span style="font-size:12.0pt;color:black">Oberon <oberon-bounces@lists.inf.ethz.ch> im Auftrag von Chris Burrows <cfbsoftware@gmail.com><br>
<b>Datum: </b>Sonntag, 7. </span><span lang="EN-US" style="font-size:12.0pt;color:black">August 2022 um 03:51<br>
<b>An: </b>ETH Oberon and related systems <oberon@lists.inf.ethz.ch><br>
<b>Betreff: </b>Re: [Oberon] Bit-fiddling: SETs and type casts in Oberon-07<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">On Sun, Aug 7, 2022 at 11:14 AM Chris Burrows <</span><a href="mailto:cfbsoftware@gmail.com"><span lang="EN-US" style="font-size:11.0pt">cfbsoftware@gmail.com</span></a><span lang="EN-US" style="font-size:11.0pt">>
wrote:<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Oops! <o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"> IF (ch >= "a") & (ch <= "z") THEN cap := CHR(ORD(ch) - 32) ELSE cap := ch END;<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt">Third time lucky? ;-)<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"> PROCEDURE CAP(ch: CHAR): CHAR;<br>
BEGIN<br>
IF (ch >= "a") & (ch <= "z") THEN ch := CHR(ORD(ch) - 32) END;<br>
RETURN ch<br>
END CAP;<o:p></o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US" style="font-size:11.0pt"> <o:p></o:p></span></p>
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