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#lang racket/base
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(require xml racket/port racket/contract "define.rkt")
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(provide (all-defined-out))
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(define+provide+safe (xml-string->xexprs str)
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(string? . -> . (values xexpr? xexpr?))
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(define xml-doc (with-input-from-string str
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(λ () (permissive-xexprs #t) (read-xml))))
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(values (xml->xexpr (document-prolog xml-doc)) (xml->xexpr (document-element xml-doc))))
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(define+provide+safe (xexprs->xml-string prolog-xexpr root-xexpr)
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(xexpr? xexpr? . -> . string?)
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(with-output-to-string (λ () (write-xml (document (xexpr->xml prolog-xexpr) (xexpr->xml root-xexpr) null)))))
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(module+ test
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(require rackunit)
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(require xml)
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(define str "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n<root>hello world</root>")
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(define-values (str-prolog str-doc) (xml-string->xexprs str))
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(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))
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(check-equal? str-doc '(root () "hello world"))
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(check-equal? (xexprs->xml-string str-prolog str-doc) str))
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