parse-starttag-pi

Description

It has become common practice to give PIs structured values. The result is a PI that looks a lot like a start tag with attributes:

<?pitarget name1="value1" name2=value2 name3="value 3">

This function parses a PI with this form and returns a list. The list contains the pitarget and each of the name/value pairs:

("pitarget" "name1" "value1" "name2" "value2" "name3" "value 3")

Author

Norman Walsh, <ndw@nwalsh.com>

Source Code

(define (parse-starttag-pi pi)
  ;; Parses a structured PI and returns a list of values
  (let* ((strippi (strip pi))
	 (spacepos (string-index strippi " ")))
    (if (< spacepos 0)
	(list strippi)
	(let* ((pitarget (substring strippi 0 spacepos))
	       (pivalues (strip (substring strippi 
					   (+ spacepos 1)
					   (string-length strippi)))))
	  (let loop ((values pivalues) (result (list pitarget)))
	    (if (string=? values "")
		result
		(loop (parse-skip-pi-attribute values)
		      (append result (parse-pi-attribute values)))))))))