I haven't followed nor maintained the SortFunctions library, but it relied heavily on the response of that method, by means of the "spaceship operator" ( #<=>), I think that Sven later changed such operator to "threeWayCompareTo:".
I don't know whether the primitive is available now, it wasn't back then. Regards, Esteban A. Maringolo On Mon, Sep 16, 2019 at 3:52 AM ducasse <steph...@netcourrier.com> wrote: > > I see > > threeWayCompareTo: aString > "Do a three-way comparison between the receiver and anotherObject, > returning > -1 if self < anotherObject > 0 if self = anotherObject > 1 if self > anotherObject > This assumes a total order in accordance with the mathematical law of > trichotomy. > See also: http://en.wikipedia.org/wiki/Three-way_comparison"; > > ^ (self compare: self with: aString collated: AsciiOrder) - 2 > > And I thought that we got a new primitive returning -101 directly > Is it not the case? > > Stef > > > String>>compare: string1 with: string2 collated: order > > "'abc' = 'abc' asWideString >>> true" > "'abc' asWideString = 'abc' >>> true" > "(ByteArray with: 97 with: 0 with: 0 with: 0) asString ~= 'a000' > asWideString >>> true" > "('abc' sameAs: 'aBc' asWideString) >>> true" > "('aBc' asWideString sameAs: 'abc') >>> true" > "('a000' asWideString ~= (ByteArray with: 97 with: 0 with: 0 with: 0) > asString) >>> true" > "((ByteArray with: 97 with: 0 with: 0 with: 0) asString sameAs: > 'Abcd' asWideString) >>> false" > "('a000' asWideString sameAs: (ByteArray with: 97 with: 0 with: 0 > with: 0) asString) >>> false" > > (string1 isByteString and: [string2 isByteString]) ifTrue: [ > ^ ByteString compare: string1 with: string2 collated: order]. > "Primitive does not fail properly right now" > ^ String compare: string1 with: string2 collated: order > > > ByteString>>compare: string1 with: string2 collated: order > "Return 1, 2 or 3, if string1 is <, =, or > string2, with the > collating order of characters given by the order array." > > | len1 len2 c1 c2 | > <primitive: 'primitiveCompareString' module: 'MiscPrimitivePlugin'> > > <var: #string1 declareC: 'unsigned char *string1'> > <var: #string2 declareC: 'unsigned char *string2'> > <var: #order declareC: 'unsigned char *order'> > > len1 := string1 size. > len2 := string2 size. > 1 to: (len1 min: len2) do: > [:i | > c1 := order at: (string1 basicAt: i) + 1. > c2 := order at: (string2 basicAt: i) + 1. > c1 = c2 ifFalse: > [c1 < c2 ifTrue: [^ 1] ifFalse: [^ 3]]]. > len1 = len2 ifTrue: [^ 2]. > len1 < len2 ifTrue: [^ 1] ifFalse: [^ 3]. > > > >
