Function: xml-parse-string

xml-parse-string is a byte-compiled function defined in xml.el.gz.

Signature

(xml-parse-string)

Documentation

Parse character data at point, and return it as a string.

Leave point at the start of the next thing to parse. This function can modify the buffer by expanding entity and character references.

Source Code

;; Defined in /usr/src/emacs/lisp/xml.el.gz
(defun xml-parse-string ()
  "Parse character data at point, and return it as a string.
Leave point at the start of the next thing to parse.  This
function can modify the buffer by expanding entity and character
references."
  (let ((start (point))
	;; Keep track of the size of the rest of the buffer:
	(old-remaining-size (- (buffer-size) (point)))
	ref val)
    (while (and (not (eobp))
		(not (looking-at-p "<")))
      ;; Find the next < or & character.
      (skip-chars-forward "^<&")
      (when (eq (char-after) ?&)
	;; If we find an entity or character reference, expand it.
	(unless (looking-at xml-entity-or-char-ref-re)
	  (error "XML: (Not Well-Formed) Invalid entity reference"))
	;; For a character reference, the next entity or character
	;; reference must be after the replacement.  [4.6] "Numerical
	;; character references are expanded immediately when
	;; recognized and MUST be treated as character data."
	(if (setq ref (match-string 2))
	    (progn  ; Numeric char reference
	      (setq val (save-match-data
                          (string-to-number
                           ref (if (match-string 1) 16))))
	      (and (null val)
		   xml-validating-parser
		   (error "XML: (Validity) Invalid character reference `%s'"
			  (match-string 0)))
	      (replace-match (if val (string val) xml-undefined-entity) t t))
	  ;; For an entity reference, search again from the start of
	  ;; the replaced text, since the replacement can contain
	  ;; entity or character references, or markup.
	  (setq ref (match-string 3)
		val (assoc ref xml-entity-alist))
	  (and (null val)
	       xml-validating-parser
	       (error "XML: (Validity) Undefined entity `%s'" ref))
	  (replace-match (or (cdr val) xml-undefined-entity) t t)
	  (goto-char (match-beginning 0)))
	;; Check for XML bombs.
	(and xml-entity-expansion-limit
	     (> (- (buffer-size) (point))
		(+ old-remaining-size xml-entity-expansion-limit))
	     (error "XML: Entity reference expansion \
surpassed `xml-entity-expansion-limit'"))))
    ;; [2.11] Clean up line breaks.
    (let ((end-marker (point-marker)))
      (goto-char start)
      (while (re-search-forward "\r\n?" end-marker t)
	(replace-match "\n" t t))
      (goto-char end-marker)
      (buffer-substring start (point)))))