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<!-- Weave of 'S/ct' generated by 7 -->
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< ul class = "crumbs" > < li > < a href = "../webs.html" > Source< / a > < / li > < li > < a href = "../extensions.html" > Kits< / a > < / li > < li > < a href = "index.html" > BasicInformKit< / a > < / li > < li > < b > Char Template< / b > < / li > < / ul > < p class = "purpose" > To decide whether letters are upper or lower case, and convert between the two.< / p >
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< ul class = "toc" > < li > < a href = "#SP1" > § 1. Char Is Of Case< / a > < / li > < li > < a href = "#SP2" > § 2. Char To Case< / a > < / li > < li > < a href = "#SP3" > § 3. Reversing Case< / a > < / li > < li > < a href = "#SP4" > § 4. DigitToValue< / a > < / li > < li > < a href = "#SP5" > § 5. Testing< / a > < / li > < / ul > < hr class = "tocbar" >
< p class = "inwebparagraph" > < a id = "SP1" > < / a > < b > § 1. Char Is Of Case. < / b > The following decides whether a character < code class = "display" > < span class = "extract" > c< / span > < / code > belongs to case < code class = "display" > < span class = "extract" > case< / span > < / code > , where
0 means lower case and 1 means upper. < code class = "display" > < span class = "extract" > c< / span > < / code > is interpreted according to the
character casing chart in "UnicodeData.i6t", which means, it will be
ZSCII for the Z-machine and Unicode for Glulx.
< / p >
< pre class = "display" >
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< span class = "plain" > [ < / span > < span class = "identifier" > CharIsOfCase< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > < / span > < span class = "identifier" > case< / span >
< span class = "identifier" > i< / span > < span class = "plain" > < / span > < span class = "identifier" > tab< / span > < span class = "plain" > < / span > < span class = "identifier" > min< / span > < span class = "plain" > < / span > < span class = "identifier" > max< / span > < span class = "plain" > < / span > < span class = "identifier" > len< / span > < span class = "plain" > < / span > < span class = "identifier" > par< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) < / span > < span class = "reserved" > rfalse< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > case< / span > < span class = "plain" > == < / span > < span class = "constant" > 0< / span > < span class = "plain" > ) {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > c< / span > < span class = "plain" > > = < / span > < span class = "character" > 'a'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < = < / span > < span class = "character" > 'z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > rtrue< / span > < span class = "plain" > ;< / span >
< span class = "identifier" > tab< / span > < span class = "plain" > = < / span > < span class = "identifier" > CharCasingChart0< / span > < span class = "plain" > ;< / span >
< span class = "plain" > } < / span > < span class = "reserved" > else< / span > < span class = "plain" > {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > c< / span > < span class = "plain" > > = < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < = < / span > < span class = "character" > 'Z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > rtrue< / span > < span class = "plain" > ;< / span >
< span class = "identifier" > tab< / span > < span class = "plain" > = < / span > < span class = "identifier" > CharCasingChart1< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > }< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < 128) < / span > < span class = "reserved" > rfalse< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > while< / span > < span class = "plain" > (< / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ) {< / span >
< span class = "identifier" > min< / span > < span class = "plain" > = < / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ; < / span > < span class = "identifier" > i< / span > < span class = "plain" > ++;< / span >
< span class = "identifier" > len< / span > < span class = "plain" > = < / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ; < / span > < span class = "identifier" > i< / span > < span class = "plain" > ++;< / span >
< span class = "identifier" > i< / span > < span class = "plain" > ++;< / span >
< span class = "identifier" > par< / span > < span class = "plain" > = < / span > < span class = "constant" > 0< / span > < span class = "plain" > ;< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > len< / span > < span class = "plain" > < 0) { < / span > < span class = "identifier" > par< / span > < span class = "plain" > = < / span > < span class = "constant" > 1< / span > < span class = "plain" > ; < / span > < span class = "identifier" > len< / span > < span class = "plain" > = -< / span > < span class = "identifier" > len< / span > < span class = "plain" > ; }< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < < / span > < span class = "identifier" > min< / span > < span class = "plain" > ) < / span > < span class = "reserved" > rfalse< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < < / span > < span class = "identifier" > min< / span > < span class = "plain" > +< / span > < span class = "identifier" > len< / span > < span class = "plain" > ) {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > par< / span > < span class = "plain" > ) { < / span > < span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > c< / span > < span class = "plain" > -< / span > < span class = "identifier" > min< / span > < span class = "plain" > ) % < / span > < span class = "constant" > 2< / span > < span class = "plain" > == < / span > < span class = "constant" > 0< / span > < span class = "plain" > ) < / span > < span class = "reserved" > rtrue< / span > < span class = "plain" > ; }< / span >
< span class = "reserved" > else< / span > < span class = "plain" > { < / span > < span class = "reserved" > rtrue< / span > < span class = "plain" > ; }< / span >
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< span class = "plain" > }< / span >
< span class = "plain" > }< / span >
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< span class = "reserved" > rfalse< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > ];< / span >
< / pre >
< p class = "inwebparagraph" > < / p >
< p class = "inwebparagraph" > < a id = "SP2" > < / a > < b > § 2. Char To Case. < / b > And the following converts character < code class = "display" > < span class = "extract" > c< / span > < / code > to the desired case, or returns
it unchanged if it is not a letter with variant casings.
< / p >
< pre class = "display" >
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< span class = "plain" > [ < / span > < span class = "identifier" > CharToCase< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > < / span > < span class = "identifier" > case< / span >
< span class = "identifier" > i< / span > < span class = "plain" > < / span > < span class = "identifier" > tab< / span > < span class = "plain" > < / span > < span class = "identifier" > min< / span > < span class = "plain" > < / span > < span class = "identifier" > max< / span > < span class = "plain" > < / span > < span class = "identifier" > len< / span > < span class = "plain" > < / span > < span class = "identifier" > par< / span > < span class = "plain" > < / span > < span class = "identifier" > del< / span > < span class = "plain" > < / span > < span class = "identifier" > f< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > case< / span > < span class = "plain" > == < / span > < span class = "constant" > 1< / span > < span class = "plain" > ) {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > c< / span > < span class = "plain" > > = < / span > < span class = "character" > 'a'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < = < / span > < span class = "character" > 'z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > -32;< / span >
< span class = "identifier" > tab< / span > < span class = "plain" > = < / span > < span class = "identifier" > CharCasingChart0< / span > < span class = "plain" > ;< / span >
< span class = "plain" > } < / span > < span class = "reserved" > else< / span > < span class = "plain" > {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > c< / span > < span class = "plain" > > = < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < = < / span > < span class = "character" > 'Z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > +32;< / span >
< span class = "identifier" > tab< / span > < span class = "plain" > = < / span > < span class = "identifier" > CharCasingChart1< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > }< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < 128) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > while< / span > < span class = "plain" > (< / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ) {< / span >
< span class = "identifier" > min< / span > < span class = "plain" > = < / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ; < / span > < span class = "identifier" > i< / span > < span class = "plain" > ++;< / span >
< span class = "identifier" > len< / span > < span class = "plain" > = < / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ; < / span > < span class = "identifier" > i< / span > < span class = "plain" > ++;< / span >
< span class = "identifier" > del< / span > < span class = "plain" > = < / span > < span class = "identifier" > tab< / span > < span class = "plain" > --> < / span > < span class = "identifier" > i< / span > < span class = "plain" > ; < / span > < span class = "identifier" > i< / span > < span class = "plain" > ++;< / span >
< span class = "identifier" > par< / span > < span class = "plain" > = < / span > < span class = "constant" > 0< / span > < span class = "plain" > ;< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > len< / span > < span class = "plain" > < 0) { < / span > < span class = "identifier" > par< / span > < span class = "plain" > = < / span > < span class = "constant" > 1< / span > < span class = "plain" > ; < / span > < span class = "identifier" > len< / span > < span class = "plain" > = -< / span > < span class = "identifier" > len< / span > < span class = "plain" > ; }< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < < / span > < span class = "identifier" > min< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > c< / span > < span class = "plain" > < < / span > < span class = "identifier" > min< / span > < span class = "plain" > +< / span > < span class = "identifier" > len< / span > < span class = "plain" > ) {< / span >
< span class = "identifier" > f< / span > < span class = "plain" > = < / span > < span class = "reserved" > false< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > par< / span > < span class = "plain" > ) { < / span > < span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > c< / span > < span class = "plain" > -< / span > < span class = "identifier" > min< / span > < span class = "plain" > ) % < / span > < span class = "constant" > 2< / span > < span class = "plain" > == < / span > < span class = "constant" > 0< / span > < span class = "plain" > ) < / span > < span class = "identifier" > f< / span > < span class = "plain" > = < / span > < span class = "reserved" > true< / span > < span class = "plain" > ; }< / span >
< span class = "reserved" > else< / span > < span class = "plain" > { < / span > < span class = "identifier" > f< / span > < span class = "plain" > = < / span > < span class = "reserved" > true< / span > < span class = "plain" > ; }< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > f< / span > < span class = "plain" > ) {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > del< / span > < span class = "plain" > == < / span > < span class = "identifier" > UNIC_NCT< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > +< / span > < span class = "identifier" > del< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > }< / span >
< span class = "plain" > }< / span >
< span class = "plain" > }< / span >
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< span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > ];< / span >
< / pre >
< p class = "inwebparagraph" > < / p >
< p class = "inwebparagraph" > < a id = "SP3" > < / a > < b > § 3. Reversing Case. < / b > It's convenient to provide this relatively fast routine to reverse the
case of a letter since this is an operation used frequently in regular
expression matching (see "RegExp.i6t").
< / p >
< pre class = "display" >
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< span class = "plain" > #< / span > < span class = "identifier" > IFDEF< / span > < span class = "plain" > < / span > < span class = "identifier" > TARGET_ZCODE< / span > < span class = "plain" > ;< / span >
< span class = "plain" > [ < / span > < span class = "identifier" > TEXT_TY_RevCase< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "character" > 'a'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "character" > 'z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -< / span > < span class = "character" > 'a'< / span > < span class = "plain" > +< / span > < span class = "character" > 'A'< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "character" > 'Z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -< / span > < span class = "character" > 'A'< / span > < span class = "plain" > +< / span > < span class = "character" > 'a'< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < 128) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 155< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 157< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +3; < / span > < span class = "comment" > a, o, u umlaut in ZSCII< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 158< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 160< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -3; < / span > < span class = "comment" > A, O, U umlaut< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 164< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 165< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +3; < / span > < span class = "comment" > e, i umlaut< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 167< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 168< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -3; < / span > < span class = "comment" > E, I umlaut< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 169< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 174< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +6; < / span > < span class = "comment" > a, e, i, o, u, y acute< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 175< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 180< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -6; < / span > < span class = "comment" > A, E, I, O, U, Y acute< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 181< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 185< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +5; < / span > < span class = "comment" > a, e, i, o, u grave< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 186< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 190< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -5; < / span > < span class = "comment" > A, E, I, O, U grave< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 191< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 195< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +5; < / span > < span class = "comment" > a, e, i, o, u circumflex< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 196< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 200< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -5; < / span > < span class = "comment" > A, E, I, O, U circumflex< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 201< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 202< / span > < span class = "plain" > ; < / span > < span class = "comment" > a circle< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 202< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 201< / span > < span class = "plain" > ; < / span > < span class = "comment" > A circle< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 203< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 204< / span > < span class = "plain" > ; < / span > < span class = "comment" > o slash< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 204< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 203< / span > < span class = "plain" > ; < / span > < span class = "comment" > O slash< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 205< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 207< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +3; < / span > < span class = "comment" > a, n, o tilde< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "constant" > 208< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "constant" > 210< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -3; < / span > < span class = "comment" > A, N, O tilde< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 211< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 212< / span > < span class = "plain" > ; < / span > < span class = "comment" > ae ligature< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 212< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 211< / span > < span class = "plain" > ; < / span > < span class = "comment" > AE ligature< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 213< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 214< / span > < span class = "plain" > ; < / span > < span class = "comment" > c cedilla< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 214< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 213< / span > < span class = "plain" > ; < / span > < span class = "comment" > C cedilla< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 215< / span > < span class = "plain" > < / span > < span class = "reserved" > or< / span > < span class = "plain" > < / span > < span class = "constant" > 216< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > +2; < / span > < span class = "comment" > thorn, eth< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 217< / span > < span class = "plain" > < / span > < span class = "reserved" > or< / span > < span class = "plain" > < / span > < span class = "constant" > 218< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -2; < / span > < span class = "comment" > Thorn, Eth< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 220< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 221< / span > < span class = "plain" > ; < / span > < span class = "comment" > oe ligature< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > == < / span > < span class = "constant" > 221< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "constant" > 220< / span > < span class = "plain" > ; < / span > < span class = "comment" > OE ligature< / span >
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< span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > ];< / span >
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< span class = "plain" > #< / span > < span class = "identifier" > IFNOT< / span > < span class = "plain" > ;< / span >
< span class = "plain" > [ < / span > < span class = "identifier" > TEXT_TY_RevCase< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "character" > 'a'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "character" > 'z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -< / span > < span class = "character" > 'a'< / span > < span class = "plain" > +< / span > < span class = "character" > 'A'< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > ch< / span > < span class = "plain" > > = < / span > < span class = "character" > 'A'< / span > < span class = "plain" > ) & & (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < = < / span > < span class = "character" > 'Z'< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > -< / span > < span class = "character" > 'A'< / span > < span class = "plain" > +< / span > < span class = "character" > 'a'< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > < 128) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > CharIsOfCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > , < / span > < span class = "constant" > 0< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > CharToCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > , < / span > < span class = "constant" > 1< / span > < span class = "plain" > );< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > CharIsOfCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > , < / span > < span class = "constant" > 1< / span > < span class = "plain" > )) < / span > < span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > CharToCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > ch< / span > < span class = "plain" > , < / span > < span class = "constant" > 0< / span > < span class = "plain" > );< / span >
< span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > ch< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > ];< / span >
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< span class = "plain" > #< / span > < span class = "identifier" > ENDIF< / span > < span class = "plain" > ;< / span >
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< / pre >
< p class = "inwebparagraph" > < / p >
< p class = "inwebparagraph" > < a id = "SP4" > < / a > < b > § 4. DigitToValue. < / b > This takes a ZSCII or Unicode character code and returns its value as a digit,
or returns -1 if it isn't a digit.
< / p >
< pre class = "display" >
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< span class = "plain" > [ < / span > < span class = "identifier" > DigitToValue< / span > < span class = "plain" > < / span > < span class = "identifier" > c< / span > < span class = "plain" > < / span > < span class = "identifier" > n< / span > < span class = "plain" > ;< / span >
< span class = "identifier" > n< / span > < span class = "plain" > = < / span > < span class = "identifier" > c< / span > < span class = "plain" > -< / span > < span class = "character" > '0'< / span > < span class = "plain" > ;< / span >
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< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > n< / span > < span class = "plain" > < 0) || (< / span > < span class = "identifier" > n< / span > < span class = "plain" > > 9)) < / span > < span class = "reserved" > return< / span > < span class = "plain" > -1;< / span >
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< span class = "reserved" > return< / span > < span class = "plain" > < / span > < span class = "identifier" > n< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > ];< / span >
< / pre >
< p class = "inwebparagraph" > < / p >
< p class = "inwebparagraph" > < a id = "SP5" > < / a > < b > § 5. Testing. < / b > Not actually used: simply for testing the tables.
< / p >
< pre class = "display" >
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< span class = "plain" > [ < / span > < span class = "identifier" > CharTestCases< / span > < span class = "plain" > < / span > < span class = "identifier" > case< / span > < span class = "plain" > < / span > < span class = "identifier" > i< / span > < span class = "plain" > < / span > < span class = "identifier" > j< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > for< / span > < span class = "plain" > (< / span > < span class = "identifier" > i< / span > < span class = "plain" > =32: < / span > < span class = "identifier" > i< / span > < span class = "plain" > < < / span > < span class = "constant" > $E0< / span > < span class = "plain" > : < / span > < span class = "identifier" > i< / span > < span class = "plain" > ++) {< / span >
< span class = "reserved" > if< / span > < span class = "plain" > ((< / span > < span class = "identifier" > i< / span > < span class = "plain" > > =127) & & (< / span > < span class = "identifier" > i< / span > < span class = "plain" > < 155)) < / span > < span class = "reserved" > continue< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > print< / span > < span class = "plain" > < / span > < span class = "identifier" > i< / span > < span class = "plain" > , < / span > < span class = "string" > " - "< / span > < span class = "plain" > , (< / span > < span class = "identifier" > char< / span > < span class = "plain" > ) < / span > < span class = "identifier" > i< / span > < span class = "plain" > , < / span > < span class = "string" > " -"< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > CharIsOfCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > i< / span > < span class = "plain" > , < / span > < span class = "constant" > 0< / span > < span class = "plain" > )) < / span > < span class = "reserved" > print< / span > < span class = "plain" > < / span > < span class = "string" > " lower"< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > CharIsOfCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > i< / span > < span class = "plain" > , < / span > < span class = "constant" > 1< / span > < span class = "plain" > )) < / span > < span class = "reserved" > print< / span > < span class = "plain" > < / span > < span class = "string" > " upper"< / span > < span class = "plain" > ;< / span >
< span class = "identifier" > j< / span > < span class = "plain" > = < / span > < span class = "identifier" > CharToCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > i< / span > < span class = "plain" > , < / span > < span class = "constant" > 0< / span > < span class = "plain" > ); < / span > < span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > j< / span > < span class = "plain" > ~= < / span > < span class = "identifier" > i< / span > < span class = "plain" > ) < / span > < span class = "reserved" > print< / span > < span class = "plain" > < / span > < span class = "string" > " tolower: "< / span > < span class = "plain" > , (< / span > < span class = "identifier" > char< / span > < span class = "plain" > ) < / span > < span class = "identifier" > j< / span > < span class = "plain" > ;< / span >
< span class = "identifier" > j< / span > < span class = "plain" > = < / span > < span class = "identifier" > CharToCase< / span > < span class = "plain" > (< / span > < span class = "identifier" > i< / span > < span class = "plain" > , < / span > < span class = "constant" > 1< / span > < span class = "plain" > ); < / span > < span class = "reserved" > if< / span > < span class = "plain" > (< / span > < span class = "identifier" > j< / span > < span class = "plain" > ~= < / span > < span class = "identifier" > i< / span > < span class = "plain" > ) < / span > < span class = "reserved" > print< / span > < span class = "plain" > < / span > < span class = "string" > " toupper: "< / span > < span class = "plain" > , (< / span > < span class = "identifier" > char< / span > < span class = "plain" > ) < / span > < span class = "identifier" > j< / span > < span class = "plain" > ;< / span >
< span class = "reserved" > print< / span > < span class = "plain" > < / span > < span class = "string" > "^"< / span > < span class = "plain" > ;< / span >
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< span class = "plain" > }< / span >
< span class = "plain" > ];< / span >
< / pre >
< p class = "inwebparagraph" > < / p >
< hr class = "tocbar" >
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