--- a/src/Pure/Tools/xml.ML Tue Aug 14 13:20:21 2007 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,181 +0,0 @@
-(* Title: Pure/Tools/xml.ML
- ID: $Id$
- Author: David Aspinall, Stefan Berghofer and Markus Wenzel
-
-Basic support for XML.
-*)
-
-signature XML =
-sig
- (* string functions *)
- val header: string
- val text: string -> string
- val text_charref: string -> string
- val cdata: string -> string
- type attributes = (string * string) list
- val attribute: string * string -> string
- val element: string -> attributes -> string list -> string
- (* tree functions *)
- datatype tree =
- Elem of string * attributes * tree list
- | Text of string
- | Output of output
- type content = tree list
- type element = string * attributes * content
- val string_of_tree: tree -> string
- val buffer_of_tree: tree -> Buffer.T
- val parse_string : string -> string option
- val parse_content: string list -> tree list * string list
- val parse_elem: string list -> tree * string list
- val parse_document: string list -> (string option * tree) * string list
- val tree_of_string: string -> tree
- val scan_comment_whspc : string list -> unit * string list
-end;
-
-structure XML: XML =
-struct
-
-(** string based representation (small scale) **)
-
-val header = "<?xml version=\"1.0\"?>\n";
-
-
-(* text and character data *)
-
-fun decode "<" = "<"
- | decode ">" = ">"
- | decode "&" = "&"
- | decode "'" = "'"
- | decode """ = "\""
- | decode c = c;
-
-fun encode "<" = "<"
- | encode ">" = ">"
- | encode "&" = "&"
- | encode "'" = "'"
- | encode "\"" = """
- | encode c = c;
-
-fun encode_charref c = "&#" ^ Int.toString (ord c) ^ ";"
-
-val text = Library.translate_string encode;
-
-val text_charref = translate_string encode_charref;
-
-val cdata = enclose "<![CDATA[" "]]>\n";
-
-
-(* elements *)
-
-fun attribute (a, x) = a ^ " = \"" ^ text x ^ "\"";
-
-fun element name atts cs =
- let val elem = space_implode " " (name :: map attribute atts) in
- if null cs then enclose "<" "/>" elem
- else enclose "<" ">" elem ^ implode cs ^ enclose "</" ">" name
- end;
-
-
-
-(** explicit XML trees **)
-
-type attributes = (string * string) list;
-
-datatype tree =
- Elem of string * attributes * tree list
- | Text of string
- | Output of output;
-
-type content = tree list;
-
-type element = string * attributes * content;
-
-fun buffer_of_tree tree =
- let
- fun string_of (Elem (name, atts, ts)) buf =
- let val buf' =
- buf |> Buffer.add "<"
- |> fold Buffer.add (separate " " (name :: map attribute atts))
- in
- if null ts then
- buf' |> Buffer.add "/>"
- else
- buf' |> Buffer.add ">"
- |> fold string_of ts
- |> Buffer.add "</" |> Buffer.add name |> Buffer.add ">"
- end
- | string_of (Text s) buf = Buffer.add (text s) buf
- | string_of (Output s) buf = Buffer.add s buf;
- in string_of tree Buffer.empty end;
-
-val string_of_tree = Buffer.content o buffer_of_tree;
-
-
-
-(** XML parsing **)
-
-fun err s (xs, _) =
- "XML parsing error: " ^ s ^ "\nfound: " ^ quote (Symbol.beginning 100 xs);
-
-val scan_whspc = Scan.many Symbol.is_blank;
-
-val scan_special = $$ "&" ^^ Symbol.scan_id ^^ $$ ";" >> decode;
-
-val parse_chars = Scan.repeat1 (Scan.unless ((* scan_whspc -- *)$$ "<")
- (scan_special || Scan.one Symbol.is_regular)) >> implode;
-
-val parse_string = Scan.read Symbol.stopper parse_chars o explode;
-
-val parse_cdata = Scan.this_string "<![CDATA[" |--
- (Scan.repeat (Scan.unless (Scan.this_string "]]>") (Scan.one Symbol.is_regular)) >>
- implode) --| Scan.this_string "]]>";
-
-val parse_att =
- Symbol.scan_id --| scan_whspc --| $$ "=" --| scan_whspc --
- (($$ "\"" || $$ "'") :|-- (fn s => (Scan.repeat (Scan.unless ($$ s)
- (scan_special || Scan.one Symbol.is_regular)) >> implode) --| $$ s));
-
-val parse_comment = Scan.this_string "<!--" --
- Scan.repeat (Scan.unless (Scan.this_string "-->") (Scan.one Symbol.is_regular)) --
- Scan.this_string "-->";
-
-val scan_comment_whspc =
- (scan_whspc >> K()) --| (Scan.repeat (parse_comment |-- (scan_whspc >> K())));
-
-val parse_pi = Scan.this_string "<?" |--
- Scan.repeat (Scan.unless (Scan.this_string "?>") (Scan.one Symbol.is_regular)) --|
- Scan.this_string "?>";
-
-fun parse_content xs =
- ((Scan.optional ((* scan_whspc |-- *) parse_chars >> (single o Text)) [] --
- (Scan.repeat ((* scan_whspc |-- *)
- ( parse_elem >> single
- || parse_cdata >> (single o Text)
- || parse_pi >> K []
- || parse_comment >> K []) --
- Scan.optional ((* scan_whspc |-- *) parse_chars >> (single o Text)) []
- >> op @) >> flat) >> op @)(* --| scan_whspc*)) xs
-
-and parse_elem xs =
- ($$ "<" |-- Symbol.scan_id --
- Scan.repeat (scan_whspc |-- parse_att) --| scan_whspc :-- (fn (s, _) =>
- !! (err "Expected > or />")
- (Scan.this_string "/>" >> K []
- || $$ ">" |-- parse_content --|
- !! (err ("Expected </" ^ s ^ ">"))
- (Scan.this_string ("</" ^ s) --| scan_whspc --| $$ ">"))) >>
- (fn ((s, atts), ts) => Elem (s, atts, ts))) xs;
-
-val parse_document =
- Scan.option (Scan.this_string "<!DOCTYPE" -- scan_whspc |--
- (Scan.repeat (Scan.unless ($$ ">")
- (Scan.one Symbol.is_regular)) >> implode) --| $$ ">" --| scan_whspc) --
- parse_elem;
-
-fun tree_of_string s =
- (case Scan.finite Symbol.stopper (Scan.error (!! (err "Malformed element")
- (scan_whspc |-- parse_elem --| scan_whspc))) (Symbol.explode s) of
- (x, []) => x
- | (_, ys) => error ("XML parsing error: Unprocessed input\n" ^ Symbol.beginning 100 ys));
-
-end;