! Copyright (C) 2005, 2009 Daniel Ehrenberg
! See http://factorcode.org/license.txt for BSD license.
-USING: namespaces xml.state kernel sequences accessors
-xml.char-classes xml.errors math io sbufs fry strings ascii
-circular xml.entities assocs make splitting math.parser
-locals combinators arrays ;
+USING: accessors ascii assocs combinators
+combinators.short-circuit hints io kernel math math.parser
+namespaces sbufs sequences splitting strings xml.char-classes
+xml.entities xml.errors xml.state ;
IN: xml.tokenize
-: assure-good-char ( ch -- ch )
- [
- version-1.0? over text? not get-check and
- [ disallowed-char ] when
- ] [ f ] if* ;
-
! * Basic utility words
-: record ( char -- )
- CHAR: \n =
- [ 0 get-line 1+ set-line ] [ get-column 1+ ] if
- set-column ;
-
-! (next) normalizes \r\n and \r
-: (next) ( -- char )
- get-next read1
- 2dup swap CHAR: \r = [
- CHAR: \n =
- [ nip read1 ] [ nip CHAR: \n swap ] if
- ] [ drop ] if
- set-next dup set-char assure-good-char ;
+: assure-good-char ( spot ch -- )
+ [
+ over {
+ [ version-1.0?>> over text? not ]
+ [ check>> ]
+ } 1&&
+ [
+ [ [ 1 + ] change-column drop ] dip
+ disallowed-char
+ ] [ 2drop ] if
+ ] [ drop ] if* ;
+
+HINTS: assure-good-char { spot fixnum } ;
+
+: record ( spot char -- spot )
+ over char>> [
+ CHAR: \n eq?
+ [ [ 1 + ] change-line -1 ] [ dup column>> 1 + ] if
+ >>column
+ ] [ drop ] if ;
+
+HINTS: record { spot fixnum } ;
+
+:: (next) ( spot -- spot char )
+ spot next>> :> old-next
+ spot stream>> stream-read1 :> new-next
+ old-next CHAR: \r eq? [
+ spot CHAR: \n >>char
+ new-next CHAR: \n eq?
+ [ spot stream>> stream-read1 >>next ]
+ [ new-next >>next ] if
+ ] [ spot old-next >>char new-next >>next ] if
+ spot next>> ; inline
+
+: next* ( spot -- )
+ dup char>> [ unexpected-end ] unless
+ (next) [ record ] keep assure-good-char ;
+
+HINTS: next* { spot } ;
: next ( -- )
- #! Increment spot.
- get-char [ unexpected-end ] unless (next) record ;
+ spot get next* ;
: init-parser ( -- )
- 0 1 0 f f t <spot> spot set
- read1 set-next next ;
+ 0 1 0 0 f t f <spot>
+ input-stream get >>stream
+ read1 >>next
+ spot set next ;
: with-state ( stream quot -- )
! with-input-stream implicitly creates a new scope which we use
swap [ init-parser call ] with-input-stream ; inline
-: skip-until ( quot: ( -- ? ) -- )
- get-char [
- [ call ] keep swap [ drop ] [
- next skip-until
- ] if
- ] [ drop ] if ; inline recursive
-
-: take-until ( quot -- string )
- #! Take the substring of a string starting at spot
- #! from code until the quotation given is true and
- #! advance spot to after the substring.
- 10 <sbuf> [
- '[ @ [ t ] [ get-char _ push f ] if ] skip-until
- ] keep >string ; inline
+:: (skip-until) ( ... quot: ( ... char -- ... ? ) spot -- ... )
+ spot char>> [
+ quot call [
+ spot next* quot spot (skip-until)
+ ] unless
+ ] when* ; inline recursive
+
+: skip-until ( ... quot: ( ... char -- ... ? ) -- ... )
+ spot get (skip-until) ; inline
+
+: take-until ( ... quot: ( ... char -- ... ? ) -- ... string )
+ ! Take the substring of a string starting at spot
+ ! from code until the quotation given is true and
+ ! advance spot to after the substring.
+ 10 <sbuf> [
+ '[ _ keep over [ drop ] [ _ push ] if ] skip-until
+ ] keep "" like ; inline
: take-to ( seq -- string )
- '[ get-char _ member? ] take-until ;
+ '[ _ member? ] take-until ; inline
: pass-blank ( -- )
- #! Advance code past any whitespace, including newlines
- [ get-char blank? not ] skip-until ;
+ ! Advance code past any whitespace, including newlines
+ [ blank? not ] skip-until ;
+
+: next-matching ( pos ch str -- pos' )
+ overd nth eq? [ 1 + ] [ drop 0 ] if ; inline
-: string-matches? ( string circular -- ? )
- get-char over push-circular
- sequence= ;
+: string-matcher ( str -- quot: ( pos char -- pos ? ) )
+ dup length 1 - '[ _ next-matching dup _ > ] ; inline
+
+:: (take-string) ( match spot -- sbuf matched? )
+ 10 <sbuf> f [
+ spot char>> [
+ nip over push
+ spot next*
+ dup match tail? dup not
+ ] [ f ] if*
+ ] loop ; inline
: take-string ( match -- string )
- dup length <circular-string>
- [ 2dup string-matches? ] take-until nip
- dup length rot length 1- - head
- get-char [ missing-close ] unless next ;
+ [ spot get (take-string) [ missing-close ] unless ]
+ [ dupd [ length ] bi@ - over shorten "" like ] bi ;
: expect ( string -- )
- dup [ get-char next ] replicate 2dup =
- [ 2drop ] [ expected ] if ;
+ dup length spot get '[ _ [ char>> ] keep next* ] "" replicate-as
+ 2dup = [ 2drop ] [ expected ] if ;
! Suddenly XML-specific
-: parse-named-entity ( string -- )
- dup entities at [ , ] [
+: parse-named-entity ( accum string -- )
+ dup entities at [ swap push ] [
dup extra-entities get at
- [ % ] [ no-entity ] ?if
+ [ swap push-all ] [ no-entity ] ?if
] ?if ;
: take-; ( -- string )
next ";" take-to next ;
-: parse-entity ( -- )
+: parse-entity ( accum -- )
take-; "#" ?head [
- "x" ?head 16 10 ? base> ,
+ "x" ?head 16 10 ? base> swap push
] [ parse-named-entity ] if ;
-: parse-pe ( -- )
+: parse-pe ( accum -- )
take-; dup pe-table get at
- [ % ] [ no-entity ] ?if ;
+ [ swap push-all ] [ no-entity ] ?if ;
-:: (parse-char) ( quot: ( ch -- ? ) -- )
- get-char :> char
+:: (parse-char) ( quot: ( ch -- ? ) accum spot -- )
+ spot char>> :> char
{
{ [ char not ] [ ] }
- { [ char quot call ] [ next ] }
- { [ char CHAR: & = ] [ parse-entity quot (parse-char) ] }
- { [ in-dtd? get char CHAR: % = and ] [ parse-pe quot (parse-char) ] }
- [ char , next quot (parse-char) ]
+ { [ char quot call ] [ spot next* ] }
+ { [ char CHAR: & eq? ] [
+ accum parse-entity
+ quot accum spot (parse-char)
+ ] }
+ { [ char CHAR: % eq? [ in-dtd? get ] [ f ] if ] [
+ accum parse-pe
+ quot accum spot (parse-char)
+ ] }
+ [
+ char accum push
+ spot next*
+ quot accum spot (parse-char)
+ ]
} cond ; inline recursive
: parse-char ( quot: ( ch -- ? ) -- seq )
- [ (parse-char) ] "" make ; inline
+ 512 <sbuf> [ spot get (parse-char) ] keep "" like ; inline
-: assure-no-]]> ( circular -- )
- "]]>" sequence= [ text-w/]]> ] when ;
+: assure-no-]]> ( pos char -- pos' )
+ "]]>" next-matching dup 2 > [ text-w/]]> ] when ; inline
:: parse-text ( -- string )
- 3 f <array> <circular> :> circ
- depth get zero? :> no-text [| char |
- char circ push-circular
- circ assure-no-]]>
- no-text [ char blank? char CHAR: < = or [
- char 1string t pre/post-content
- ] unless ] when
- char CHAR: < =
+ depth get zero? :> no-text
+ 0 :> pos!
+ [| char |
+ pos char assure-no-]]> pos!
+ no-text [
+ char blank? char CHAR: < eq? or [
+ char 1string t pre/post-content
+ ] unless
+ ] when
+ char CHAR: < eq?
] parse-char ;
: close ( -- )
pass-blank ">" expect ;
: normalize-quote ( str -- str )
- [ dup "\t\r\n" member? [ drop CHAR: \s ] when ] map ;
+ [ dup "\t\r\n" member? [ drop CHAR: \s ] when ] map! ;
: (parse-quote) ( <-disallowed? ch -- string )
swap '[
- dup _ = [ drop t ]
- [ CHAR: < = _ and [ attr-w/< ] [ f ] if ] if
+ dup _ eq? [ drop t ]
+ [ CHAR: < eq? _ and [ attr-w/< ] [ f ] if ] if
] parse-char normalize-quote get-char
[ unclosed-quote ] unless ; inline
: parse-quote ( -- seq )
f parse-quote* ;
-
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