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sugar/sugar/xml.rkt

30 lines
1.1 KiB
Racket

#lang racket/base
(require xml
racket/port
racket/contract
"define.rkt")
(provide (all-defined-out))
(define+provide+safe (xml-string->xexprs str)
(string? . -> . (values xexpr? xexpr?))
(parameterize ([current-input-port (open-input-string str)]
[permissive-xexprs #true])
(define xml-doc (read-xml))
(values (xml->xexpr (document-prolog xml-doc)) (xml->xexpr (document-element xml-doc)))))
(define+provide+safe (xexprs->xml-string prolog-xexpr root-xexpr)
(xexpr? xexpr? . -> . string?)
(with-output-to-string
(λ ()
(parameterize ([permissive-xexprs #true])
(write-xml (document (xexpr->xml prolog-xexpr) (xexpr->xml root-xexpr) null))))))
(module+ test
(require rackunit)
(require xml)
(define str "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<root>hello world</root>")
(define-values (str-prolog str-doc) (xml-string->xexprs str))
(check-equal? str-prolog (prolog (list (p-i (location 1 0 1) (location 1 38 39) 'xml "version=\"1.0\" encoding=\"utf-8\"")) #f null))
(check-equal? str-doc '(root () "hello world"))
(check-equal? (xexprs->xml-string str-prolog str-doc) str))