SINGLETON: json-null
+ERROR: json-error ;
+
: if-json-null ( x if-null else -- )
[ dup json-null? ]
[ [ drop ] prepose ]
[ ] tri* if ; inline
: when-json-null ( x if-null -- ) [ ] if-json-null ; inline
+
: unless-json-null ( x else -- ) [ ] swap if-json-null ; inline
"json.reader" require
! Copyright (C) 2008 Peter Burns, 2009 Philipp Winkler
! See http://factorcode.org/license.txt for BSD license.
-USING: accessors arrays assocs combinators fry hashtables io
-io.streams.string json kernel kernel.private make math
-math.parser namespaces prettyprint sequences sequences.private
-strings vectors ;
+USING: arrays assocs combinators fry hashtables io
+io.streams.string json kernel kernel.private math math.parser
+namespaces sbufs sequences sequences.private strings vectors ;
IN: json.reader
<PRIVATE
-: value ( char stream -- num char )
+: json-number ( char stream -- num char )
[ 1string ] [ "\s\t\r\n,:}]" swap stream-read-until ] bi*
[ append string>number ] dip ;
-DEFER: j-string%
+DEFER: (read-json-string)
-: j-escape% ( stream -- )
- dup stream-read1 {
+: (read-json-escape) ( stream accum -- accum )
+ { sbuf } declare
+ over stream-read1 {
{ CHAR: " [ CHAR: " ] }
{ CHAR: \\ [ CHAR: \\ ] }
{ CHAR: / [ CHAR: / ] }
{ CHAR: n [ CHAR: \n ] }
{ CHAR: r [ CHAR: \r ] }
{ CHAR: t [ CHAR: \t ] }
- { CHAR: u [ 4 over stream-read hex> ] }
+ { CHAR: u [ 4 pick stream-read hex> ] }
[ ]
- } case [ , j-string% ] [ drop ] if* ;
+ } case [ suffix! (read-json-string) ] [ json-error ] if* ;
-: j-string% ( stream -- )
- "\\\"" over stream-read-until [ % ] dip
- CHAR: \" = [ drop ] [ j-escape% ] if ;
+: (read-json-string) ( stream accum -- accum )
+ { sbuf } declare
+ "\\\"" pick stream-read-until [ append! ] dip
+ CHAR: \" = [ nip ] [ (read-json-escape) ] if ;
-: j-string ( stream -- str )
+: read-json-string ( stream -- str )
"\\\"" over stream-read-until CHAR: \" =
- [ nip ] [ [ % j-escape% ] "" make ] if ;
+ [ nip ] [ >sbuf (read-json-escape) { sbuf } declare "" like ] if ;
: second-last-unsafe ( seq -- second-last )
[ length 2 - ] [ nth-unsafe ] bi ; inline
: pop-unsafe ( seq -- elt )
[ length 1 - ] keep [ nth-unsafe ] [ shorten ] 2bi ; inline
-ERROR: json-error ;
-
: check-length ( seq n -- seq )
- [ dup length ] [ >= ] bi* [ json-error ] unless
- { vector } declare ; inline
+ [ dup length ] [ >= ] bi* [ json-error ] unless ; inline
-: v-over-push ( vec -- vec' )
- 2 check-length dup [ pop-unsafe ] [ last-unsafe ] bi
- push ;
+: v-over-push ( accum -- accum )
+ { vector } declare 2 check-length
+ dup [ pop-unsafe ] [ last-unsafe ] bi
+ { vector } declare push ;
-: v-pick-push ( vec -- vec' )
- 3 check-length dup [ pop-unsafe ] [ second-last-unsafe ] bi
- push ;
+: v-pick-push ( accum -- accum )
+ { vector } declare 3 check-length dup
+ [ pop-unsafe ] [ second-last-unsafe ] bi
+ { vector } declare push ;
-: (close) ( accum -- accum' )
- { vector } declare
- dup last V{ } = not [ v-over-push ] when ;
+: v-pop ( accum -- vector )
+ pop { vector } declare ; inline
-: (close-array) ( accum -- accum' )
+: v-close ( accum -- accum )
{ vector } declare
- (close) dup pop >array suffix! ;
+ dup last V{ } = not [ v-over-push ] when
+ { vector } declare ; inline
-: (close-hash) ( accum -- accum' )
- { vector } declare
- (close) dup dup [ pop ] bi@ 2dup min-length <hashtable>
- [ [ set-at ] curry 2each ] keep suffix! ;
+: json-open-array ( accum -- accum )
+ { vector } declare V{ } clone suffix! ;
+
+: json-open-hash ( accum -- accum )
+ { vector } declare V{ } clone suffix! V{ } clone suffix! ;
+
+: json-close-array ( accum -- accum )
+ v-close dup v-pop { } like suffix! ;
+
+: json-close-hash ( accum -- accum )
+ v-close dup dup [ v-pop ] bi@ swap H{ } zip-as suffix! ;
+
+: json-expect ( token stream -- )
+ [ dup length ] [ stream-read ] bi* = [ json-error ] unless ; inline
: scan ( stream accum char -- stream accum )
! 2dup 1string swap . . ! Great for debug...
+ { object vector object } declare
{
- { CHAR: \" [ over j-string suffix! ] }
- { CHAR: [ [ V{ } clone suffix! ] }
+ { CHAR: \" [ over read-json-string suffix! ] }
+ { CHAR: [ [ json-open-array ] }
{ CHAR: , [ v-over-push ] }
- { CHAR: ] [ (close-array) ] }
- { CHAR: { [ 2 [ V{ } clone suffix! ] times ] }
+ { CHAR: ] [ json-close-array ] }
+ { CHAR: { [ json-open-hash ] }
{ CHAR: : [ v-pick-push ] }
- { CHAR: } [ (close-hash) ] }
+ { CHAR: } [ json-close-hash ] }
{ CHAR: \s [ ] }
{ CHAR: \t [ ] }
{ CHAR: \r [ ] }
{ CHAR: \n [ ] }
- { CHAR: t [ 3 pick stream-read drop t suffix! ] }
- { CHAR: f [ 4 pick stream-read drop f suffix! ] }
- { CHAR: n [ 3 pick stream-read drop json-null suffix! ] }
- [ pick value [ suffix! ] dip [ scan ] when* ]
+ { CHAR: t [ "rue" pick json-expect t suffix! ] }
+ { CHAR: f [ "alse" pick json-expect f suffix! ] }
+ { CHAR: n [ "ull" pick json-expect json-null suffix! ] }
+ [ pick json-number [ suffix! ] dip [ scan ] when* ]
} case ;
: stream-json-read ( stream -- objects )
- V{ } clone over '[ _ stream-read1 dup ]
- [ scan ] while drop nip ;
+ V{ } clone over '[ _ stream-read1 dup ] [ scan ] while drop nip ;
PRIVATE>
HELP: json-print
{ $values { "obj" object } }
-{ $description "Serializes the object into a JSON formatted string and outputs it to the standard output stream.
-
-By default, tuples and hashtables are serialized into Javascript-friendly JSON formatted output by converting keys containing dashes into underscores. This behaviour can be modified by setting the dynamic variable " { $strong "jsvar-encode?" } " to false." }
+{ $description "Serializes the object into a JSON formatted string and outputs it to the standard output stream."
+$nl
+"Some options can control the formatting of the result:"
+{ $table
+ { { $link json-allow-nans? } "Allow special floating-points: NaN, Infinity, -Infinity." }
+ { { $link json-friendly-keys? } "Convert - to _ in tuple slots and hashtable keys" }
+ { { $link json-coerce-keys? } "Coerce hashtable keys into strings" }
+ { { $link json-escape-slashes? } "Escape forward slashes inside strings" }
+ { { $link json-escape-unicode? } "Escape unicode values inside strings" }
+}
+}
{ $see-also >json } ;
ARTICLE: "json.writer" "JSON writer"
{ "-102" } [ -102 >json ] unit-test
{ "102.0" } [ 102.0 >json ] unit-test
{ "102.5" } [ 102.5 >json ] unit-test
+{ "0.5" } [ 1/2 >json ] unit-test
{ "[1,\"two\",3.0]" } [ { 1 "two" 3.0 } >json ] unit-test
-{ """{"US$":1.0,"EU\\u20ac\":1.5}""" } [ H{ { "US$" 1.0 } { "EU€" 1.5 } } >json ] unit-test
+{ """{"US$":1.0,"EU€":1.5}""" } [ H{ { "US$" 1.0 } { "EU€" 1.5 } } >json ] unit-test
-! Random symbols are written simply as strings
-SYMBOL: testSymbol
-{ """"testSymbol"""" } [ testSymbol >json ] unit-test
+{ """">json"""" } [ \ >json >json ] unit-test
[ { 0.5 } ] [ { 1/2 } >json json> ] unit-test
-[ "{\"b-b\":\"asdf\"}" ]
- [ f jsvar-encode? [ "asdf" "b-b" associate >json ] with-variable ] unit-test
+TUPLE: person first-name age ;
-[ "{\"b_b\":\"asdf\"}" ]
- [ t jsvar-encode? [ "asdf" "b-b" associate >json ] with-variable ] unit-test
+[ "{\"first-name\":\"David\",\"age\":32}" ]
+[
+ f json-friendly-keys?
+ [ "David" 32 person boa >json ]
+ with-variable
+] unit-test
-TUPLE: person name age a-a ;
-[ "{\"name\":\"David-David\",\"age\":32,\"a_a\":{\"b_b\":\"asdf\"}}" ]
- [ t jsvar-encode?
- [ "David-David" 32 H{ { "b-b" "asdf" } } person boa >json ]
- with-variable ] unit-test
-[ "{\"name\":\"Alpha-Beta\",\"age\":32,\"a-a\":{\"b-b\":\"asdf\"}}" ]
- [ f jsvar-encode?
- [ "Alpha-Beta" 32 H{ { "b-b" "asdf" } } person boa >json ]
- with-variable ] unit-test
+[ "{\"first_name\":\"David\",\"age\":32}" ]
+[
+ t json-friendly-keys?
+ [ "David" 32 person boa >json ]
+ with-variable
+] unit-test
{ """{"1":2,"3":4}""" }
[ H{ { "1" 2 } { "3" 4 } } >json ] unit-test
{ """{"3.1":3}""" }
[ H{ { 3.1 3 } } >json ] unit-test
+{ """{"null":1}""" }
+[ H{ { json-null 1 } } >json ] unit-test
+
{ """{"Infinity":1}""" }
-[ H{ { 1/0. 1 } } >json ] unit-test
+[ t json-allow-nans? [ H{ { 1/0. 1 } } >json ] with-variable ] unit-test
{ """{"-Infinity":1}""" }
-[ H{ { -1/0. 1 } } >json ] unit-test
-
-{ """{"null":1}""" }
-[ H{ { json-null 1 } } >json ] unit-test
+[ t json-allow-nans? [ H{ { -1/0. 1 } } >json ] with-variable ] unit-test
{ """{"NaN":1}""" }
-[ H{ { NAN: 333 1 } } >json ] unit-test
+[ t json-allow-nans? [ H{ { NAN: 333 1 } } >json ] with-variable ] unit-test
{
"\"\\u0000\\u0001\\u0002\\u0003\\u0004\\u0005\\u0006\\u0007\\b\\t\\n\\u000b\\f\\r\\u000e\\u000f\\u0010\\u0011\\u0012\\u0013\\u0014\\u0015\\u0016\\u0017\\u0018\\u0019\\u001a\\u001b\\u001c\\u001d\\u001e\\u001f\""
! Copyright (C) 2006 Chris Double.
! See http://factorcode.org/license.txt for BSD license.
USING: accessors ascii assocs combinators fry hashtables io
-io.streams.string json kernel math math.parser mirrors
+io.streams.string json kernel locals math math.parser mirrors
namespaces sequences strings tr words ;
IN: json.writer
+SYMBOL: json-allow-nans?
+f json-allow-nans? set-global
+
+SYMBOL: json-friendly-keys?
+t json-friendly-keys? set-global
+
+SYMBOL: json-coerce-keys?
+t json-coerce-keys? set-global
+
+SYMBOL: json-escape-slashes?
+f json-escape-slashes? set-global
+
+SYMBOL: json-escape-unicode?
+f json-escape-unicode? set-global
+
#! Writes the object out to a stream in JSON format
GENERIC# stream-json-print 1 ( obj stream -- )
CHAR: " over stream-write1 swap [
{
{ CHAR: " [ "\\\"" over stream-write ] }
- { CHAR: \\ [ "\\\\" over stream-write ] }
- { CHAR: / [ "\\/" over stream-write ] }
+ { CHAR: \\ [ "\\\\" over stream-write ] }
+ { CHAR: / [
+ json-escape-slashes? get
+ [ "\\/" over stream-write ]
+ [ CHAR: / over stream-write1 ] if
+ ] }
{ CHAR: \b [ "\\b" over stream-write ] }
{ CHAR: \f [ "\\f" over stream-write ] }
{ CHAR: \n [ "\\n" over stream-write ] }
{ CHAR: \r [ "\\r" over stream-write ] }
{ CHAR: \s [ "\\s" over stream-write ] }
{ CHAR: \t [ "\\t" over stream-write ] }
+ { 0x2028 [ "\\u2028" over stream-write ] }
+ { 0x2029 [ "\\u2029" over stream-write ] }
[
- dup printable?
- [ over stream-write1 ]
- [
+ {
+ { [ dup printable? ] [ f ] }
+ { [ dup control? ] [ t ] }
+ [ json-escape-unicode? get ]
+ } cond [
+ dup 0xffff > [ json-error ] when
"\\u" pick stream-write
>hex 4 CHAR: 0 pad-head
over stream-write
+ ] [
+ over stream-write1
] if
]
} case
[ number>string ] [ stream-write ] bi* ;
: float>json ( float -- string )
- {
- { [ dup fp-nan? ] [ drop "NaN" ] }
- { [ dup 1/0. = ] [ drop "Infinity" ] }
- { [ dup -1/0. = ] [ drop "-Infinity" ] }
- [ number>string ]
- } cond ;
+ dup fp-special? [
+ json-allow-nans? get [ json-error ] unless
+ {
+ { [ dup fp-nan? ] [ drop "NaN" ] }
+ { [ dup 1/0. = ] [ drop "Infinity" ] }
+ { [ dup -1/0. = ] [ drop "-Infinity" ] }
+ } cond
+ ] [
+ number>string
+ ] if ;
M: float stream-json-print
[ float>json ] [ stream-write ] bi* ;
[ >float number>string ] [ stream-write ] bi* ;
M: sequence stream-json-print
- CHAR: [ over stream-write1 swap [
- over '[ CHAR: , _ stream-write1 ]
- pick '[ _ stream-json-print ] interleave
- ] unless-empty CHAR: ] swap stream-write1 ;
-
-SYMBOL: jsvar-encode?
-t jsvar-encode? set-global
-TR: jsvar-encode "-" "_" ;
-
-GENERIC: >js-key ( obj -- str )
-M: boolean >js-key "true" "false" ? ;
-M: string >js-key jsvar-encode ;
-M: number >js-key number>string ;
-M: float >js-key float>json ;
-M: json-null >js-key drop "null" ;
+ CHAR: [ over stream-write1 swap
+ over '[ CHAR: , _ stream-write1 ]
+ pick '[ _ stream-json-print ] interleave
+ CHAR: ] swap stream-write1 ;
<PRIVATE
-: json-print-assoc ( assoc stream -- )
- CHAR: { over stream-write1 swap >alist [
- jsvar-encode? get [
- over '[ CHAR: , _ stream-write1 ]
- pick dup '[
- first2
- [ >js-key _ stream-json-print ]
- [ _ CHAR: : over stream-write1 stream-json-print ]
- bi*
- ] interleave
+TR: json-friendly "-" "_" ;
+
+GENERIC: json-key ( obj -- str )
+M: f json-key drop "false" ;
+M: t json-key drop "true" ;
+M: json-null json-key drop "null" ;
+M: integer json-key number>string ;
+M: float json-key float>json ;
+M: real json-key >float number>string ;
+
+:: json-print-assoc ( obj stream -- )
+ CHAR: { stream stream-write1 obj >alist
+ [ CHAR: , stream stream-write1 ]
+ json-friendly-keys? get
+ json-coerce-keys? get '[
+ first2 [
+ dup string?
+ [ _ [ json-friendly ] when ]
+ [ _ [ json-key ] when ] if
+ stream stream-json-print
] [
- over '[ CHAR: , _ stream-write1 ]
- pick dup '[
- first2
- [ _ stream-json-print ]
- [ _ CHAR: : over stream-write1 stream-json-print ]
- bi*
- ] interleave
- ] if
- ] unless-empty CHAR: } swap stream-write1 ;
+ CHAR: : stream stream-write1
+ stream stream-json-print
+ ] bi*
+ ] interleave
+ CHAR: } stream stream-write1 ;
PRIVATE>
projects / factor.git / commitdiff