Merge branch 'json' of git://github.com/rictic/factor
Slava Pestov
commit
fbf26ca0eb
basis/json
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@ -1 +1,2 @@
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Chris Double
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Peter Burns
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@ -1,4 +1,4 @@
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USING: arrays json.reader kernel multiline strings tools.test ;
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USING: arrays json.reader kernel multiline strings tools.test hashtables ;
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IN: json.reader.tests
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{ f } [ "false" json> ] unit-test
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@ -8,21 +8,35 @@ IN: json.reader.tests
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{ 102 } [ "102" json> ] unit-test
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{ -102 } [ "-102" json> ] unit-test
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{ 102 } [ "+102" json> ] unit-test
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{ 1000.0 } [ "1.0e3" json> ] unit-test
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{ 1000.0 } [ "10e2" json> ] unit-test
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{ 102.0 } [ "102.0" json> ] unit-test
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{ 102.5 } [ "102.5" json> ] unit-test
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{ 102.5 } [ "102.50" json> ] unit-test
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{ -10250.0 } [ "-102.5e2" json> ] unit-test
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{ -10250.0 } [ "-102.5E+2" json> ] unit-test
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{ 10+1/4 } [ "1025e-2" json> ] unit-test
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{ 10.25 } [ "1025e-2" json> ] unit-test
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{ 0.125 } [ "0.125" json> ] unit-test
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{ -0.125 } [ "-0.125" json> ] unit-test
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! not widely supported by javascript, but allowed in the grammar, and a nice
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! feature to get
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{ -0.0 } [ "-0.0" json> ] unit-test
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{ " fuzzy pickles " } [ <" " fuzzy pickles " "> json> ] unit-test
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{ "while 1:\n\tpass" } [ <" "while 1:\n\tpass" "> json> ] unit-test
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! unicode is allowed in json
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{ "ß∂¬ƒ˚∆" } [ <" "ß∂¬ƒ˚∆""> json> ] unit-test
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{ 8 9 10 12 13 34 47 92 } >string 1array [ <" "\b\t\n\f\r\"\/\\" "> json> ] unit-test
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{ HEX: abcd } >string 1array [ <" "\uaBCd" "> json> ] unit-test
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{ { } } [ "[]" json> ] unit-test
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{ { 1 "two" 3.0 } } [ <" [1, "two", 3.0] "> json> ] unit-test
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{ H{ } } [ "{}" json> ] unit-test
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! the returned hashtable should be different every time
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{ H{ } } [ "key" "value" "{}" json> ?set-at "{}" json> nip ] unit-test
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{ H{ { "US$" 1.0 } { "EU€" 1.5 } } } [ <" { "US$":1.00, "EU\u20AC":1.50 } "> json> ] unit-test
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{ H{
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{ "fib" { 1 1 2 3 5 8 H{ { "etc" "etc" } } } }
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@ -40,4 +54,3 @@ IN: json.reader.tests
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{ 0 } [ " 0" json> ] unit-test
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{ 0 } [ "0 " json> ] unit-test
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{ 0 } [ " 0 " json> ] unit-test
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@ -1,180 +1,57 @@
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! Copyright (C) 2006 Chris Double.
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! Copyright (C) 2008 Peter Burns.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel parser-combinators namespaces make sequences promises strings
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assocs math math.parser math.vectors math.functions math.order
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lists hashtables ascii accessors ;
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USING: kernel peg peg.ebnf math.parser math.private strings math math.functions sequences
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arrays vectors hashtables assocs prettyprint ;
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IN: json.reader
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SINGLETON: json-null
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: grammar-list>vector ( seq -- vec ) first2 values swap prefix ;
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! Grammar for JSON from RFC 4627
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EBNF: json>
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SYMBOL: json-null
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ws = (" " | "\r" | "\t" | "\n")*
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: [<&>] ( quot -- quot )
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{ } make unclip [ <&> ] reduce ;
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true = "true" => [[ t ]]
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false = "false" => [[ f ]]
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null = "null" => [[ json-null ]]
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: [<|>] ( quot -- quot )
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{ } make unclip [ <|> ] reduce ;
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hex = [0-9a-fA-F]
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char = '\\"' [[ CHAR: " ]]
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| "\\\\" [[ CHAR: \ ]]
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| "\\/" [[ CHAR: / ]]
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| "\\b" [[ 8 ]]
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| "\\f" [[ 12 ]]
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| "\\n" [[ CHAR: \n ]]
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| "\\r" [[ CHAR: \r ]]
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| "\\t" [[ CHAR: \t ]]
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| "\\u" (hex hex hex hex) [[ hex> ]] => [[ second ]]
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| [^"\]
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string = '"' char*:cs '"' => [[ cs >string ]]
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LAZY: 'ws' ( -- parser )
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" " token
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"\n" token <|>
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"\r" token <|>
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"\t" token <|> <*> ;
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sign = ("-" | "+")? => [[ "-" = "-" "" ? ]]
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digits = [0-9]+ => [[ >string ]]
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decimal = "." digits => [[ concat ]]
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exp = ("e" | "E") sign digits => [[ concat ]]
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number = sign digits decimal? exp? => [[ dup concat swap fourth [ string>float ] [ string>number ] if ]]
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LAZY: spaced ( parser -- parser )
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'ws' swap &> 'ws' <& ;
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elements = value ("," value)* => [[ grammar-list>vector ]]
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array = "[" elements?:arr "]" => [[ arr >array ]]
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LAZY: 'begin-array' ( -- parser )
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"[" token spaced ;
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pair = ws string:key ws ":" value:val => [[ { key val } ]]
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members = pair ("," pair)* => [[ grammar-list>vector ]]
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object = "{" members?:hash "}" => [[ hash >hashtable ]]
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LAZY: 'begin-object' ( -- parser )
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"{" token spaced ;
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val = true
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| false
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| null
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| string
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| number
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| array
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| object
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LAZY: 'end-array' ( -- parser )
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"]" token spaced ;
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value = ws val:v ws => [[ v ]]
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LAZY: 'end-object' ( -- parser )
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"}" token spaced ;
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LAZY: 'name-separator' ( -- parser )
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":" token spaced ;
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LAZY: 'value-separator' ( -- parser )
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"," token spaced ;
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LAZY: 'false' ( -- parser )
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"false" token [ drop f ] <@ ;
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LAZY: 'null' ( -- parser )
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"null" token [ drop json-null ] <@ ;
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LAZY: 'true' ( -- parser )
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"true" token [ drop t ] <@ ;
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LAZY: 'quot' ( -- parser )
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"\"" token ;
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LAZY: 'hex-digit' ( -- parser )
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[ digit> ] satisfy [ digit> ] <@ ;
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: hex-digits>ch ( digits -- ch )
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0 [ swap 16 * + ] reduce ;
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LAZY: 'string-char' ( -- parser )
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[ quotable? ] satisfy
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"\\b" token [ drop 8 ] <@ <|>
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"\\t" token [ drop CHAR: \t ] <@ <|>
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"\\n" token [ drop CHAR: \n ] <@ <|>
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"\\f" token [ drop 12 ] <@ <|>
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"\\r" token [ drop CHAR: \r ] <@ <|>
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"\\\"" token [ drop CHAR: " ] <@ <|>
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"\\/" token [ drop CHAR: / ] <@ <|>
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"\\\\" token [ drop CHAR: \\ ] <@ <|>
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"\\u" token 'hex-digit' 4 exactly-n &>
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[ hex-digits>ch ] <@ <|> ;
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LAZY: 'string' ( -- parser )
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'quot'
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'string-char' <*> &>
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'quot' <& [ >string ] <@ ;
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DEFER: 'value'
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LAZY: 'member' ( -- parser )
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'string'
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'name-separator' <&
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'value' <&> ;
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USE: prettyprint
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LAZY: 'object' ( -- parser )
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'begin-object'
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'member' 'value-separator' list-of &>
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'end-object' <& [ >hashtable ] <@ ;
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LAZY: 'array' ( -- parser )
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'begin-array'
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'value' 'value-separator' list-of &>
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'end-array' <& ;
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LAZY: 'minus' ( -- parser )
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"-" token ;
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LAZY: 'plus' ( -- parser )
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"+" token ;
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LAZY: 'sign' ( -- parser )
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'minus' 'plus' <|> ;
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LAZY: 'zero' ( -- parser )
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"0" token [ drop 0 ] <@ ;
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LAZY: 'decimal-point' ( -- parser )
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"." token ;
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LAZY: 'digit1-9' ( -- parser )
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[
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dup integer? [
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CHAR: 1 CHAR: 9 between?
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] [
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drop f
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] if
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] satisfy [ digit> ] <@ ;
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LAZY: 'digit0-9' ( -- parser )
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[ digit? ] satisfy [ digit> ] <@ ;
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: decimal>integer ( seq -- num ) 10 digits>integer ;
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LAZY: 'int' ( -- parser )
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'zero'
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'digit1-9' 'digit0-9' <*> <&:> [ decimal>integer ] <@ <|> ;
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LAZY: 'e' ( -- parser )
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"e" token "E" token <|> ;
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: sign-number ( pair -- number )
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#! Pair is { minus? num }
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#! Convert the json number value to a factor number
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dup second swap first [ first "-" = [ -1 * ] when ] when* ;
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LAZY: 'exp' ( -- parser )
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'e'
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'sign' <?> &>
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'digit0-9' <+> [ decimal>integer ] <@ <&> [ sign-number ] <@ ;
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: sequence>frac ( seq -- num )
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#! { 1 2 3 } => 0.123
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reverse 0 [ swap 10 / + ] reduce 10 / >float ;
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LAZY: 'frac' ( -- parser )
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'decimal-point' 'digit0-9' <+> &> [ sequence>frac ] <@ ;
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: raise-to-power ( pair -- num )
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#! Pair is { num exp }.
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#! Multiply 'num' by 10^exp
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dup second dup [ 10 swap first ^ swap first * ] [ drop first ] if ;
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LAZY: 'number' ( -- parser )
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'sign' <?>
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[ 'int' , 'frac' 0 succeed <|> , ] [<&>] [ sum ] <@
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'exp' <?> <&> [ raise-to-power ] <@ <&> [ sign-number ] <@ ;
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LAZY: 'value' ( -- parser )
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[
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'false' ,
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'null' ,
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'true' ,
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'string' ,
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'object' ,
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'array' ,
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'number' ,
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] [<|>] spaced ;
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ERROR: could-not-parse-json ;
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: json> ( string -- object )
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#! Parse a json formatted string to a factor object
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'value' parse dup nil? [
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could-not-parse-json
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] [
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car parsed>>
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] if ;
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;EBNF
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@ -0,0 +1,18 @@
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USING: json.writer tools.test multiline json.reader ;
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IN: json.writer.tests
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{ "false" } [ f >json ] unit-test
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{ "true" } [ t >json ] unit-test
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{ "null" } [ json-null >json ] unit-test
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{ "0" } [ 0 >json ] unit-test
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{ "102" } [ 102 >json ] unit-test
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{ "-102" } [ -102 >json ] unit-test
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{ "102.0" } [ 102.0 >json ] unit-test
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{ "102.5" } [ 102.5 >json ] unit-test
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{ "[1,\"two\",3.0]" } [ { 1 "two" 3.0 } >json ] unit-test
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{ <" {"US$":1.0,"EU€":1.5}"> } [ H{ { "US$" 1.0 } { "EU€" 1.5 } } >json ] unit-test
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! Random symbols are written simply as strings
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SYMBOL: testSymbol
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{ <" "testSymbol""> } [ testSymbol >json ] unit-test
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@ -2,43 +2,49 @@
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel io.streams.string io strings splitting sequences
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math math.parser assocs classes words namespaces make
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prettyprint hashtables mirrors tr ;
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prettyprint hashtables mirrors tr json.reader ;
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IN: json.writer
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#! Writes the object out to a stream in JSON format
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GENERIC: json-print ( obj -- )
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: >json ( obj -- string )
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#! Returns a string representing the factor object in JSON format
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[ json-print ] with-string-writer ;
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#! Returns a string representing the factor object in JSON format
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[ json-print ] with-string-writer ;
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M: f json-print ( f -- )
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drop "false" write ;
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drop "false" write ;
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M: t json-print ( t -- )
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drop "true" write ;
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M: json-null json-print ( null -- )
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drop "null" write ;
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M: string json-print ( obj -- )
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CHAR: " write1 "\"" split "\\\"" join CHAR: \r swap remove "\n" split "\\r\\n" join write CHAR: " write1 ;
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CHAR: " write1 "\"" split "\\\"" join CHAR: \r swap remove "\n" split "\\r\\n" join write CHAR: " write1 ;
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M: number json-print ( num -- )
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number>string write ;
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number>string write ;
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M: sequence json-print ( array -- )
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CHAR: [ write1 [ >json ] map "," join write CHAR: ] write1 ;
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CHAR: [ write1 [ >json ] map "," join write CHAR: ] write1 ;
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TR: jsvar-encode "-" "_" ;
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: tuple>fields ( object -- seq )
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<mirror> [
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[ swap jsvar-encode >json % " : " % >json % ] "" make
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] { } assoc>map ;
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<mirror> [
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[ swap jsvar-encode >json % " : " % >json % ] "" make
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] { } assoc>map ;
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M: tuple json-print ( tuple -- )
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CHAR: { write1 tuple>fields "," join write CHAR: } write1 ;
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CHAR: { write1 tuple>fields "," join write CHAR: } write1 ;
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M: hashtable json-print ( hashtable -- )
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CHAR: { write1
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[ [ swap jsvar-encode >json % CHAR: : , >json % ] "" make ]
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{ } assoc>map "," join write
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CHAR: } write1 ;
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CHAR: { write1
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[ [ swap jsvar-encode >json % CHAR: : , >json % ] "" make ]
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{ } assoc>map "," join write
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CHAR: } write1 ;
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||||
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M: object json-print ( object -- )
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unparse json-print ;
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|
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Loading…
Reference in New Issue