├── README ├── ChangeLog ├── .gitignore ├── AUTHORS ├── NEWS ├── json.scm ├── json ├── syntax.scm ├── builder.scm └── parser.scm ├── README.org ├── COPYING.LESSER └── COPYING /README: -------------------------------------------------------------------------------- 1 | README.org -------------------------------------------------------------------------------- /ChangeLog: -------------------------------------------------------------------------------- 1 | ## The contents of this file will be generated during 'make dist' by the 2 | ## shell command: 3 | 4 | git log --summary --stat 5 | 6 | # which you can run using 'sh ChangeLog' 7 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | 2 | /autom4te.cache 3 | /build-aux/install-sh 4 | /build-aux/missing 5 | 6 | /aclocal.m4 7 | /config.log 8 | /config.status 9 | /configure 10 | /env 11 | 12 | Makefile 13 | Makefile.in 14 | *.go 15 | 16 | guile-json-* 17 | -------------------------------------------------------------------------------- /AUTHORS: -------------------------------------------------------------------------------- 1 | Aleix Conchillo Flaque is the author and current 2 | maintainer of guile-json. More details at . 3 | 4 | List of contributors (in alphabetical order): 5 | 6 | Jan Nieuwenhuizen 7 | Ian Price 8 | David Thompson 9 | Doug Woos 10 | -------------------------------------------------------------------------------- /NEWS: -------------------------------------------------------------------------------- 1 | 2 | * Version 0.5.0 (Feb 21, 2015) 3 | 4 | - Allow converting simple alists to json 5 | e.g.: (scm->json-string '((a . 1) (b . 2)))) 6 | (thanks to Jan Nieuwenhuizen) 7 | 8 | 9 | * Version 0.4.0 (Aug 17, 2014) 10 | 11 | - Add unquote-splicing support to json form. 12 | (thanks to David Thompson) 13 | 14 | 15 | * Version 0.3.1 (Jul 6, 2013) 16 | 17 | - Use pure sh script syntax in env.in. 18 | (thanks to Andrew Gaylard) 19 | 20 | 21 | * Version 0.3.0 (May 13, 2013) 22 | 23 | - Re-licensed under LGPLv3. 24 | 25 | - Use new guile.m4 macro. 26 | 27 | - Convert rationals to floats to comply with JSON spec. 28 | (closes github #3, patch from Doug Woos) 29 | 30 | 31 | * Version 0.2.0 (Apr 2, 2013) 32 | 33 | - Improve parser errors by providing an additional parser argument to 34 | the json-invalid exception. 35 | 36 | 37 | * Version 0.1.3 (Feb 10, 2013) 38 | 39 | - Automatically update pkg-list.scm version. 40 | 41 | 42 | * Version 0.1.2 (Feb 7, 2013) 43 | 44 | - Fix pretty printing. 45 | 46 | - Use (display) instead of (simple-format) when possible. 47 | 48 | 49 | * Version 0.1.1 (Feb 2, 2013) 50 | 51 | - Use (car)/(cdr) instead of (drop-right)/(last). This should be more 52 | efficient. 53 | 54 | 55 | * Version 0.1.0 (Jan 30, 2013) 56 | 57 | Initial release. 58 | -------------------------------------------------------------------------------- /json.scm: -------------------------------------------------------------------------------- 1 | ;;; (json) --- Guile JSON implementation. 2 | 3 | ;; Copyright (C) 2013 Aleix Conchillo Flaque 4 | ;; 5 | ;; This file is part of guile-json. 6 | ;; 7 | ;; guile-json is free software; you can redistribute it and/or 8 | ;; modify it under the terms of the GNU Lesser General Public 9 | ;; License as published by the Free Software Foundation; either 10 | ;; version 3 of the License, or (at your option) any later version. 11 | ;; 12 | ;; guile-json is distributed in the hope that it will be useful, 13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 | ;; Lesser General Public License for more details. 16 | ;; 17 | ;; You should have received a copy of the GNU Lesser General Public 18 | ;; License along with guile-json; if not, write to the Free Software 19 | ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 | ;; 02110-1301 USA 21 | 22 | ;;; Commentary: 23 | 24 | ;; JSON module for Guile 25 | 26 | ;;; Code: 27 | 28 | (library (json) 29 | (export json 30 | scm->json 31 | scm->json-string 32 | json->scm 33 | json-string->scm 34 | json-parser? 35 | json-parser-port) 36 | (import (json builder) 37 | (json parser) 38 | (json syntax))) 39 | 40 | ;(define-syntax re-export-modules 41 | ; (syntax-rules () 42 | ; ((_ (mod ...) ...) 43 | ; (begin 44 | ; (module-use! (module-public-interface (current-module)) 45 | ; (resolve-interface '(mod ...))) 46 | ; ...)))) 47 | ; 48 | ;(re-export-modules (json builder) 49 | ; (json parser) 50 | ; (json syntax))) 51 | 52 | ;;; (json) ends here 53 | -------------------------------------------------------------------------------- /json/syntax.scm: -------------------------------------------------------------------------------- 1 | ;;; (json syntax) --- Guile JSON implementation. 2 | 3 | ;; Copyright (C) 2013 Aleix Conchillo Flaque 4 | ;; 5 | ;; This file is part of guile-json. 6 | ;; 7 | ;; guile-json is free software; you can redistribute it and/or 8 | ;; modify it under the terms of the GNU Lesser General Public 9 | ;; License as published by the Free Software Foundation; either 10 | ;; version 3 of the License, or (at your option) any later version. 11 | ;; 12 | ;; guile-json is distributed in the hope that it will be useful, 13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 | ;; Lesser General Public License for more details. 16 | ;; 17 | ;; You should have received a copy of the GNU Lesser General Public 18 | ;; License along with guile-json; if not, write to the Free Software 19 | ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 | ;; 02110-1301 USA 21 | 22 | ;;; Commentary: 23 | 24 | ;; JSON module for Guile 25 | 26 | ;;; Code: 27 | 28 | (library (json syntax) 29 | (export json) 30 | (import (chezscheme)) 31 | 32 | (define (list->hash-table lst) 33 | (let loop ((table (make-hash-table)) 34 | (lst lst)) 35 | (if (not (null? lst)) 36 | (let* ([pair (car list)] 37 | [key (car pair)] 38 | [value (cdr pair)]) 39 | (hashtable-set! table key value) 40 | (loop table (cdr list))) 41 | table))) 42 | 43 | (define-syntax json 44 | (syntax-rules (unquote unquote-splicing array object) 45 | ((_ (unquote val)) 46 | val) 47 | ((_ ((unquote-splicing val) . rest)) 48 | (append val (json rest))) 49 | ((_ (array val . rest)) 50 | (cons (json val) (json rest))) 51 | ((_ (object key+val ...)) 52 | (list->hash-table 53 | (json (array key+val ...)))) 54 | ((_ (val . rest)) 55 | (cons (json val) (json rest))) 56 | ((_ val) 57 | (quote val)))) 58 | ) 59 | 60 | ;;; (json syntax) ends here 61 | -------------------------------------------------------------------------------- /README.org: -------------------------------------------------------------------------------- 1 | * chez-json 2 | 3 | fork from 4 | 5 | -------------------------------------------------------------- 6 | 7 | * guile-json 8 | 9 | guile-json is a JSON module for Guile. It supports parsing and 10 | building JSON documents according to the http://json.org 11 | specification. These are the main features: 12 | 13 | - Strictly complies to http://json.org specification. 14 | 15 | - Build JSON documents programmatically via macros. 16 | 17 | - Basic unicode support for strings. 18 | 19 | - Allows JSON pretty printing. 20 | 21 | 22 | * Installation 23 | 24 | guile-json is freely available for download under the terms of the GNU 25 | Lesser General Public License version 3 (LGPLv3+). 26 | 27 | Download the latest tarball and untar it: 28 | 29 | - [[http://download.savannah.gnu.org/releases/guile-json/guile-json-0.5.0.tar.gz][guile-json-0.5.0.tar.gz]] 30 | 31 | Then, run the typical sequence: 32 | 33 | : $ ./configure --prefix= 34 | : $ make 35 | : $ sudo make install 36 | 37 | Where should preferably be the same as your system Guile 38 | installation directory (e.g. /usr). 39 | 40 | If everything installed successfully you should be up and running: 41 | 42 | : $ guile 43 | : scheme@(guile-user)> (use-modules (json)) 44 | : scheme@(guile-user)> (scm->json (json (array 1 2 3))) 45 | : [1, 2, 3] 46 | 47 | It might be that you installed guile-json somewhere differently than 48 | your system's Guile. If so, you need to indicate Guile where to find 49 | guile-json, for example: 50 | 51 | : $ GUILE_LOAD_PATH=/usr/local/share/guile/site guile 52 | 53 | A pkg-list.scm file is also provided for users of the 54 | Guildhall/Dorodango packaging system. 55 | 56 | 57 | * Usage 58 | 59 | guile-json provides a few procedures to parse and build a JSON 60 | document. A JSON document is transformed into or from native Guile 61 | values according to the following table: 62 | 63 | | JSON | Guile | 64 | |--------+------------| 65 | | string | string | 66 | | number | number | 67 | | object | hash-table | 68 | | array | list | 69 | | true | #t | 70 | | false | #f | 71 | | null | #nil | 72 | 73 | To start using guile-json procedures and macros you first need to load 74 | the module: 75 | 76 | : scheme@(guile-user)> (use-modules (json)) 77 | 78 | 79 | ** Procedures 80 | 81 | - (*json->scm* #:optional port) : Reads a JSON document from the given 82 | port, or from the current input port if none is given. 83 | 84 | - /port/ : is optional, it defaults to the current input port. 85 | 86 | - (*json-string->scm* str) : Reads a JSON document from the given 87 | string. 88 | 89 | - (*scm->json* native #:optional port #:key escape pretty) : Creates a 90 | JSON document from the given native Guile value. The JSON document is 91 | written into the given port, or to the current output port if non is 92 | given. 93 | 94 | - /port/ : it defaults to the current output port. 95 | - /escape/ : if true, the slash (/ solidus) character will be escaped. 96 | - /pretty/ : if true, the JSON document will be pretty printed. 97 | 98 | - (*scm->json-string* native #:key escape pretty) : Creates a JSON 99 | document from the given native Guile value into a string. 100 | 101 | - /escape/ : if true, the slash (/ solidus) character will be escaped. 102 | - /pretty/ : if true, the JSON document will be pretty printed. 103 | 104 | 105 | ** Exceptions 106 | 107 | A /json-invalid/ exception is thrown if an error is found during the 108 | JSON parsing. Since version 0.2.0, the /json-invalid/ exception has a 109 | single parser argument (see predicate and accessors below). The line or 110 | column where the error occured can be easily obtained from the parser 111 | port (calling /port-line/ or /port-column/ on the port). 112 | 113 | - (*json-parser?* parser) : Tells whether the given argument is a JSON 114 | parser record type. 115 | 116 | - (*json-parser-port* parser) : Get the port that the parser was reading 117 | from. 118 | 119 | 120 | ** Macros 121 | 122 | It is also possible to build JSON documents programmatically using the 123 | main /json/ macro (and /object/ and /array/). Here are some examples: 124 | 125 | - Build the string "hello world": 126 | 127 | : scheme@(guile-user)> (scm->json (json "hello world")) 128 | : "hello world" 129 | 130 | - Build the [1, 2, 3] array: 131 | 132 | : scheme@(guile-user)> (scm->json (json (array 1 2 3))) 133 | : [1, 2, 3] 134 | 135 | - Build the [1, 2, 3, 4] array using unquote-splicing: 136 | 137 | : scheme@(guile-user)> (define values '(2 3)) 138 | : scheme@(guile-user)> (scm->json (json (array 1 ,@values 4))) 139 | : [1, 2, 3, 4] 140 | 141 | - Build the object { "project" : "foo", "author" : "bar" }: 142 | 143 | : scheme@(guile-user)> (scm->json (json (object ("project" "foo") 144 | : ("author" "bar")))) 145 | : {"author" : "bar", "project" : "foo"} 146 | 147 | - Build the object { "values" : [ 234, 98.56 ] }: 148 | 149 | : scheme@(guile-user)> (scm->json (json (object ("values" (array 234 98.56))))) 150 | : {"values" : [234, 98.56]} 151 | 152 | - Build the object { "values" : [ 234, 98.56 ] } again, this time using 153 | a variable: 154 | 155 | : scheme@(guile-user)> (define values '(234 98.56)) 156 | : scheme@(guile-user)> (scm->json (json (object ("values" ,values)))) 157 | : {"values" : [1, 2, 3]} 158 | -------------------------------------------------------------------------------- /COPYING.LESSER: -------------------------------------------------------------------------------- 1 | GNU LESSER GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | 9 | This version of the GNU Lesser General Public License incorporates 10 | the terms and conditions of version 3 of the GNU General Public 11 | License, supplemented by the additional permissions listed below. 12 | 13 | 0. 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Revised Versions of the GNU Lesser General Public License. 145 | 146 | The Free Software Foundation may publish revised and/or new versions 147 | of the GNU Lesser General Public License from time to time. Such new 148 | versions will be similar in spirit to the present version, but may 149 | differ in detail to address new problems or concerns. 150 | 151 | Each version is given a distinguishing version number. If the 152 | Library as you received it specifies that a certain numbered version 153 | of the GNU Lesser General Public License "or any later version" 154 | applies to it, you have the option of following the terms and 155 | conditions either of that published version or of any later version 156 | published by the Free Software Foundation. If the Library as you 157 | received it does not specify a version number of the GNU Lesser 158 | General Public License, you may choose any version of the GNU Lesser 159 | General Public License ever published by the Free Software Foundation. 160 | 161 | If the Library as you received it specifies that a proxy can decide 162 | whether future versions of the GNU Lesser General Public License shall 163 | apply, that proxy's public statement of acceptance of any version is 164 | permanent authorization for you to choose that version for the 165 | Library. 166 | -------------------------------------------------------------------------------- /json/builder.scm: -------------------------------------------------------------------------------- 1 | ;;; (json builder) --- Guile JSON implementation. 2 | 3 | ;; Copyright (C) 2013 Aleix Conchillo Flaque 4 | ;; Copyright (C) 2015,2016 Jan Nieuwenhuizen 5 | ;; 6 | ;; This file is part of guile-json. 7 | ;; 8 | ;; guile-json is free software; you can redistribute it and/or 9 | ;; modify it under the terms of the GNU Lesser General Public 10 | ;; License as published by the Free Software Foundation; either 11 | ;; version 3 of the License, or (at your option) any later version. 12 | ;; 13 | ;; guile-json is distributed in the hope that it will be useful, 14 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 15 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 | ;; Lesser General Public License for more details. 17 | ;; 18 | ;; You should have received a copy of the GNU Lesser General Public 19 | ;; License along with guile-json; if not, write to the Free Software 20 | ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 | ;; 02110-1301 USA 22 | 23 | ;;; Commentary: 24 | 25 | ;; JSON module for Guile 26 | 27 | ;;; Code: 28 | 29 | (library (json builder) 30 | (export scm->json 31 | scm->json-string) 32 | (import (chezscheme)) 33 | 34 | ;; 35 | ;; String builder helpers 36 | ;; 37 | 38 | (define (unicode->string unicode) 39 | (format #f "\\u~4,'0x" unicode)) 40 | 41 | (define (char->unicode-string c) 42 | (let ((unicode (char->integer c))) 43 | (if (< unicode 32) 44 | (unicode->string unicode) 45 | (string c)))) 46 | 47 | (define (u8v-2->unicode bv) 48 | (let ((bv0 (bytevector-u8-ref bv 0)) 49 | (bv1 (bytevector-u8-ref bv 1))) 50 | (+ (ash (logand bv0 #b00011111) 6) 51 | (logand bv1 #b00111111)))) 52 | 53 | (define (u8v-3->unicode bv) 54 | (let ((bv0 (bytevector-u8-ref bv 0)) 55 | (bv1 (bytevector-u8-ref bv 1)) 56 | (bv2 (bytevector-u8-ref bv 2))) 57 | (+ (ash (logand bv0 #b00001111) 12) 58 | (ash (logand bv1 #b00111111) 6) 59 | (logand bv2 #b00111111)))) 60 | 61 | (define (build-char-string c) 62 | (let* ((bv (string->utf8 (string c))) 63 | (len (bytevector-length bv))) 64 | (cond 65 | ;; A single byte UTF-8 66 | ((eq? len 1) (char->unicode-string c)) 67 | ;; If we have a 2 or 3 byte UTF-8 we need to output it as \uHHHH 68 | ((or (eq? len 2) (eq? len 3)) 69 | (let ((unicode (if (eq? len 2) 70 | (u8v-2->unicode bv) 71 | (u8v-3->unicode bv)))) 72 | (unicode->string unicode))) 73 | ;; Anything else should wrong, hopefully. 74 | (else (error 'json-invalid "json invalid"))))) 75 | 76 | ;; 77 | ;; Object builder functions 78 | ;; 79 | 80 | (define (build-object-pair p port escape pretty level) 81 | (display (indent-string pretty level) port) 82 | (json-build-string (car p) port escape) 83 | (display " : " port) 84 | (json-build (cdr p) port escape pretty level)) 85 | 86 | (define (build-newline port pretty) 87 | (cond (pretty (newline port)))) 88 | 89 | (define (indent-string pretty level) 90 | ;(if pretty (format #f "~v_" (* 4 level)) "")) 91 | ; fix for chez: 92 | (if pretty (format #f "~vA" (* 4 level) "") "")) 93 | 94 | ;; 95 | ;; Main builder functions 96 | ;; 97 | 98 | (define (json-build-null port) 99 | (display "null" port)) 100 | 101 | (define (json-build-boolean scm port) 102 | (display (if scm "true" "false") port)) 103 | 104 | (define (json-build-number scm port) 105 | (if (and (rational? scm) (not (integer? scm))) 106 | (display (number->string (exact->inexact scm)) port) 107 | (display (number->string scm) port))) 108 | 109 | (define (->string x) 110 | (cond ((char? x) (make-string 1 x)) 111 | ((number? x) (number->string x)) 112 | ((symbol? x) (symbol->string x)) 113 | (else x))) 114 | 115 | ;(define (atom? x) 116 | ; (or (char? x) (number? x) (string? x) (symbol? x))) 117 | 118 | (define (json-alist? x) 119 | (and (pair? x) 120 | (let loop ((x x)) 121 | (or (null? x) 122 | (null? (car x)) 123 | (and (pair? (car x)) (atom? (caar x)) 124 | (loop (cdr x))))))) 125 | 126 | (define (json-build-string scm port escape) 127 | (display "\"" port) 128 | (display 129 | (list->string 130 | (fold-right append '() 131 | (map 132 | (lambda (c) 133 | (case c 134 | ((#\" #\\) `(#\\ ,c)) 135 | ((#\backspace) '(#\\ #\b)) 136 | ((#\page) '(#\\ #\f)) 137 | ((#\newline) '(#\\ #\n)) 138 | ((#\return) '(#\\ #\r)) 139 | ((#\tab) '(#\\ #\t)) 140 | ((#\/) (if escape `(#\\ ,c) (list c))) 141 | (else (string->list (build-char-string c))))) 142 | (string->list (->string scm))))) 143 | port) 144 | (display "\"" port)) 145 | 146 | (define (json-build-array scm port escape pretty level) 147 | (display "[" port) 148 | (unless (null? scm) 149 | (json-build (car scm) port escape pretty (+ level 1)) 150 | (for-each (lambda (v) 151 | (display ", " port) 152 | (json-build v port escape pretty (+ level 1))) 153 | (cdr scm))) 154 | (display "]" port)) 155 | 156 | (define (json-build-object scm port escape pretty level) 157 | (build-newline port pretty) 158 | (format port "~A{" (indent-string pretty level)) 159 | (build-newline port pretty) 160 | (let ((pairs scm)) 161 | (unless (null? pairs) 162 | (build-object-pair (car pairs) port escape pretty (+ level 1)) 163 | (for-each (lambda (p) 164 | (display "," port) 165 | (build-newline port pretty) 166 | (build-object-pair p port escape pretty (+ level 1))) 167 | (cdr pairs)))) 168 | (build-newline port pretty) 169 | (format port "~A}" (indent-string pretty level))) 170 | 171 | (define (hash-table->list hash-table) 172 | (hash-table-map hash-table (lambda (k v) 173 | (cons k v)))) 174 | 175 | (define (json-build scm port escape pretty level) 176 | (cond 177 | ((null? scm) (json-build-null port)) 178 | ((boolean? scm) (json-build-boolean scm port)) 179 | ((number? scm) (json-build-number scm port)) 180 | ((symbol? scm) (json-build-string (symbol->string scm) port escape)) 181 | ((string? scm) (json-build-string scm port escape)) 182 | ((json-alist? scm) (json-build-object scm port escape pretty level)) 183 | ((list? scm) (json-build-array scm port escape pretty level)) 184 | ((hash-table? scm) 185 | (json-build-object (hash-table->list scm) port escape pretty level)) 186 | (else (error 'json-invalid "json invalid")))) 187 | 188 | ;; 189 | ;; Public procedures 190 | ;; 191 | 192 | ;(define* (scm->json scm 193 | ; #:optional (port (current-output-port)) 194 | ; #:key (escape #f) (pretty #f)) 195 | ; "Creates a JSON document from native. The argument @var{scm} contains 196 | ; the native value of the JSON document. Takes one optional argument, 197 | ; @var{port}, which defaults to the current output port where the JSON 198 | ; document will be written." 199 | ; (json-build scm port escape pretty 0)) 200 | 201 | (define scm->json 202 | (case-lambda 203 | [(scm) (scm->json scm (current-output-port))] 204 | [(scm port) (scm->json scm port #f #f)] 205 | [(scm port escape pretty) (json-build scm port escape pretty 0)])) 206 | 207 | ;(define* (scm->json-string scm #:key (escape #f) (pretty #f)) 208 | ; "Creates a JSON document from native into a string. The argument 209 | ; @var{scm} contains the native value of the JSON document." 210 | ; (call-with-output-string 211 | ; (lambda (p) 212 | ; (scm->json scm p #:escape escape #:pretty pretty)))) 213 | 214 | (define scm->json-string 215 | (case-lambda 216 | [(scm) (scm->json-string scm #f #f)] 217 | [(scm escape pretty) (call-with-string-output-port 218 | (lambda (p) 219 | (scm->json scm p escape pretty)))])) 220 | ) 221 | ;;; (json builder) ends here 222 | -------------------------------------------------------------------------------- /json/parser.scm: -------------------------------------------------------------------------------- 1 | ;;; (json parser) --- Guile JSON implementation. 2 | 3 | ;; Copyright (C) 2013 Aleix Conchillo Flaque 4 | ;; 5 | ;; This file is part of guile-json. 6 | ;; 7 | ;; guile-json is free software; you can redistribute it and/or 8 | ;; modify it under the terms of the GNU Lesser General Public 9 | ;; License as published by the Free Software Foundation; either 10 | ;; version 3 of the License, or (at your option) any later version. 11 | ;; 12 | ;; guile-json is distributed in the hope that it will be useful, 13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of 14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 | ;; Lesser General Public License for more details. 16 | ;; 17 | ;; You should have received a copy of the GNU Lesser General Public 18 | ;; License along with guile-json; if not, write to the Free Software 19 | ;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 20 | ;; 02110-1301 USA 21 | 22 | ;;; Commentary: 23 | 24 | ;; JSON module for Guile 25 | 26 | ;;; Code: 27 | 28 | #!chezscheme 29 | (library (json parser) 30 | (export json->scm 31 | json-string->scm 32 | json-parser? 33 | json-parser-port) 34 | (import (chezscheme)) 35 | ;(ice-9 rdelim) 36 | 37 | ;; 38 | ;; Parser record and read helpers 39 | ;; 40 | 41 | ;(define-record-type json-parser 42 | ; (make-json-parser port) 43 | ; json-parser? 44 | ; (port json-parser-port)) 45 | 46 | (define-structure (json-parser port)) 47 | 48 | (define (parser-peek-char parser) 49 | (peek-char (json-parser-port parser))) 50 | 51 | (define (parser-read-char parser) 52 | (read-char (json-parser-port parser))) 53 | 54 | ;(define (parser-read-delimited parser delim handle-delim) 55 | ; (let ((port (json-parser-port parser))) 56 | ; (read-delimited delim port handle-delim))) 57 | 58 | ;; 59 | ;; Number parsing helpers 60 | ;; 61 | 62 | ;; Read + or -. . If something different is found, return empty string. 63 | (define (read-sign parser) 64 | (let loop ((c (parser-peek-char parser)) (s "")) 65 | (case c 66 | ((#\+ #\-) 67 | (let ((ch (parser-read-char parser))) 68 | (string-append s (string ch)))) 69 | (else s)))) 70 | 71 | ;; Read digits [0..9]. If something different is found, return empty 72 | ;; string. 73 | (define (read-digits parser) 74 | (let loop ((c (parser-peek-char parser)) (s "")) 75 | (case c 76 | ((#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9) 77 | (let ((ch (parser-read-char parser))) 78 | (loop (parser-peek-char parser) 79 | (string-append s (string ch))))) 80 | (else s)))) 81 | 82 | (define (string-null? str) 83 | (string=? str "")) 84 | 85 | (define (read-exp-part parser) 86 | (let ((c (parser-peek-char parser)) (s "")) 87 | (case c 88 | ;; Stop parsing if whitespace found. 89 | ((#\tab #\vtab #\newline #\return #\space) s) 90 | ;; We might be in an array or object, so stop here too. 91 | ((#\, #\] #\}) s) 92 | ;; We might have the exponential part 93 | ((#\e #\E) 94 | (let* ((ch (parser-read-char parser)) ; current char 95 | (sign (read-sign parser)) 96 | (digits (read-digits parser))) 97 | ;; If we don't have sign or digits, we have an invalid 98 | ;; number. 99 | (if (not (and (string-null? sign) 100 | (string-null? digits))) 101 | (string-append s (string ch) sign digits) 102 | #f))) 103 | ;; If we have a character different than e or E, we have an 104 | ;; invalid number. 105 | (else #f)))) 106 | 107 | (define (read-real-part parser) 108 | (let ((c (parser-peek-char parser)) (s "")) 109 | (case c 110 | ;; Stop parsing if whitespace found. 111 | ((#\tab #\vtab #\newline #\return #\space) s) 112 | ;; We might be in an array or object, so stop here too. 113 | ((#\, #\] #\}) s) 114 | ;; If we read . we might have a real number 115 | ((#\.) 116 | (let* ((ch (parser-read-char parser)) 117 | (digits (read-digits parser))) 118 | ;; If we have digits, try to read the exponential part, 119 | ;; otherwise we have an invalid number. 120 | (cond 121 | ((not (string-null? digits)) 122 | (let ((exp (read-exp-part parser))) 123 | (cond 124 | (exp (string-append s (string ch) digits exp)) 125 | (else #f)))) 126 | (else #f)))) 127 | ;; If we have a character different than . we might continue 128 | ;; processing. 129 | (else #f)))) 130 | 131 | (define (read-number parser) 132 | (let loop ((c (parser-peek-char parser)) (s "")) 133 | (case c 134 | ;; Stop parsing if whitespace found. 135 | ((#\tab #\vtab #\newline #\return #\space) s) 136 | ;; We might be in an array or object, so stop here too. 137 | ((#\, #\] #\}) s) 138 | ((#\-) 139 | (let ((ch (parser-read-char parser))) 140 | (loop (parser-peek-char parser) 141 | (string-append s (string ch))))) 142 | ((#\0) 143 | (let* ((ch (parser-read-char parser)) 144 | (tail (or (read-real-part parser) 145 | (error 'json-invalid "json invalid" parser)))) 146 | (string-append s 147 | (string ch) 148 | tail))) 149 | ((#\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9) 150 | (let* ((ch (parser-read-char parser)) 151 | (digit (read-digits parser)) 152 | (tail (or (read-real-part parser) 153 | (read-exp-part parser) 154 | (error 'json-invalid "json invalid" parser)))) 155 | (string-append s 156 | (string ch) 157 | digit 158 | tail))) 159 | (else (error 'json-invalid "json invalid" parser))))) 160 | 161 | ;; 162 | ;; Object parsing helpers 163 | ;; 164 | 165 | (define (read-pair parser) 166 | ;; Read string key 167 | (let ((key (json-read-string parser))) 168 | (let loop ((c (parser-peek-char parser))) 169 | (case c 170 | ;; Skip whitespaces 171 | ((#\tab #\vtab #\newline #\return #\space) 172 | (parser-read-char parser) 173 | (loop (parser-peek-char parser))) 174 | ;; Skip colon and read value 175 | ((#\:) 176 | (parser-read-char parser) 177 | (cons key (json-read parser))) 178 | ;; invalid object 179 | (else (error 'json-invalid "json invalid" parser)))))) 180 | 181 | (define (read-object parser) 182 | (let loop ((c (parser-peek-char parser)) 183 | (pairs (make-hashtable equal-hash equal?))) 184 | (case c 185 | ;; Skip whitespaces 186 | ((#\tab #\vtab #\newline #\return #\space) 187 | (parser-read-char parser) 188 | (loop (parser-peek-char parser) pairs)) 189 | ;; end of object 190 | ((#\}) 191 | (parser-read-char parser) 192 | pairs) 193 | ;; Read one pair and continue 194 | ((#\") 195 | (let ((pair (read-pair parser))) 196 | (hashtable-set! pairs (car pair) (cdr pair)) 197 | (loop (parser-peek-char parser) pairs))) 198 | ;; Skip comma and read more pairs 199 | ((#\,) 200 | (parser-read-char parser) 201 | (loop (parser-peek-char parser) pairs)) 202 | ;; invalid object 203 | (else (error 'json-invalid "json invalid" parser))))) 204 | 205 | ;; 206 | ;; Array parsing helpers 207 | ;; 208 | 209 | (define (read-array parser) 210 | (let loop ((c (parser-peek-char parser)) (values '())) 211 | (case c 212 | ;; Skip whitespace and comma 213 | ((#\tab #\vtab #\newline #\return #\space #\,) 214 | (parser-read-char parser) 215 | (loop (parser-peek-char parser) values)) 216 | ;; end of array 217 | ((#\]) 218 | (parser-read-char parser) 219 | values) 220 | ;; this can be any json object 221 | (else 222 | (let ((value (json-read parser))) 223 | (loop (parser-peek-char parser) 224 | (append values (list value)))))))) 225 | 226 | ;; 227 | ;; String parsing helpers 228 | ;; 229 | 230 | (define (expect parser expected) 231 | (let ((ch (parser-read-char parser))) 232 | (if (not (char=? ch expected)) 233 | (error 'json-invalid "json invalid" parser) 234 | ch))) 235 | 236 | (define (expect-string parser expected) 237 | (for-all (lambda (ch) (expect parser ch)) 238 | (string->list expected))) 239 | 240 | (define (read-hex-digit parser) 241 | (let ((c (parser-read-char parser))) 242 | (case c 243 | ((#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 244 | #\A #\B #\C #\D #\E #\F #\a #\b #\c #\d #\e #\f) c) 245 | (else (error 'json-invalid "json invalid" parser))))) 246 | 247 | (define (read-control-char parser) 248 | (let ((c (parser-read-char parser))) 249 | (case c 250 | ((#\" #\\ #\/) (string c)) 251 | ((#\b) (string #\backspace)) 252 | ((#\f) (string #\page)) 253 | ((#\n) (string #\newline)) 254 | ((#\r) (string #\return)) 255 | ((#\t) (string #\tab)) 256 | ((#\u) 257 | (let* ((utf1 (format "~a~a" 258 | (read-hex-digit parser) 259 | (read-hex-digit parser))) 260 | (utf2 (format "~a~a" 261 | (read-hex-digit parser) 262 | (read-hex-digit parser))) 263 | (vu8 (list (string->number utf1 16) 264 | (string->number utf2 16))) 265 | (utf (u8-list->bytevector vu8))) 266 | (utf16->string utf 'big))) 267 | (else #f)))) 268 | 269 | (define (read-until-quote-or-slash parser) 270 | (let ([port (json-parser-port parser)]) 271 | (let loop ([buf '()] [c (read-char port)]) 272 | (case c 273 | [(#\" #\\ #!eof) (cons (list->string (reverse! buf)) c)] 274 | (else (loop (cons c buf) (read-char port))))))) 275 | 276 | (define (read-string parser) 277 | ;; Read characters until \ or " are found. 278 | (let loop ((result "") 279 | ;(current (parser-read-delimited parser "\\\"" 'split)) 280 | (current (read-until-quote-or-slash parser))) 281 | (case (cdr current) 282 | ((#\") 283 | (string-append result (car current))) 284 | ((#\\) 285 | (let ((ch (read-control-char parser))) 286 | (if ch 287 | (loop (string-append result (car current) ch) 288 | ;(parser-read-delimited parser "\\\"" 'split) 289 | (read-until-quote-or-slash parser)) 290 | (error 'json-invalid "json invalid" parser)))) 291 | (else 292 | (error 'json-invalid "json invalid" parser))))) 293 | 294 | ;; 295 | ;; Main parser functions 296 | ;; 297 | 298 | (define-syntax json-read-delimited 299 | (syntax-rules () 300 | ((json-read-delimited parser delim read-func) 301 | (let loop ((c (parser-read-char parser))) 302 | (case c 303 | ;; skip whitespace 304 | ((#\tab #\vtab #\newline #\return #\space) (loop (parser-peek-char parser))) 305 | ;; read contents 306 | ((delim) (read-func parser)) 307 | (else (error 'json-invalid "json invalid" parser))))))) 308 | 309 | (define (json-read-true parser) 310 | (expect-string parser "true") 311 | #t) 312 | 313 | (define (json-read-false parser) 314 | (expect-string parser "false") 315 | #f) 316 | 317 | (define (json-read-null parser) 318 | (expect-string parser "null") 319 | '()) 320 | 321 | (define (json-read-object parser) 322 | (json-read-delimited parser #\{ read-object)) 323 | 324 | (define (json-read-array parser) 325 | (json-read-delimited parser #\[ read-array)) 326 | 327 | (define (json-read-string parser) 328 | (json-read-delimited parser #\" read-string)) 329 | 330 | (define (json-read-number parser) 331 | (string->number (read-number parser))) 332 | 333 | (define (json-read parser) 334 | (let loop ((c (parser-peek-char parser))) 335 | (cond 336 | ;;If we reach the end we might have an incomplete document 337 | ((eof-object? c) (error 'json-invalid "json invalid" parser)) 338 | (else 339 | (case c 340 | ;; skip whitespaces 341 | ((#\tab #\vtab #\newline #\return #\space) 342 | (parser-read-char parser) 343 | (loop (parser-peek-char parser))) 344 | ;; read json values 345 | ((#\t) (json-read-true parser)) 346 | ((#\f) (json-read-false parser)) 347 | ((#\n) (json-read-null parser)) 348 | ((#\{) (json-read-object parser)) 349 | ((#\[) (json-read-array parser)) 350 | ((#\") (json-read-string parser)) 351 | ;; anything else should be a number 352 | (else (json-read-number parser))))))) 353 | 354 | ;; 355 | ;; Public procedures 356 | ;; 357 | 358 | ;(define* (json->scm #:optional (port (current-input-port))) 359 | ; "Parse a JSON document into native. Takes one optional argument, 360 | ; @var{port}, which defaults to the current input port from where the JSON 361 | ; document is read." 362 | ; (json-read (make-json-parser port))) 363 | 364 | (define json->scm 365 | (case-lambda 366 | [() (json->scm (current-input-port))] 367 | [(port) (json-read (make-json-parser port))])) 368 | 369 | ;(define* (json-string->scm str) 370 | ; "Parse a JSON document into native. Takes a string argument, 371 | ; @var{str}, that contains the JSON document." 372 | ; (call-with-input-string str (lambda (p) (json->scm p)))) 373 | 374 | (define (json-string->scm str) 375 | (json->scm (open-input-string str)))) 376 | 377 | ;;; (json parser) ends here 378 | -------------------------------------------------------------------------------- /COPYING: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------