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|
(******************************************************************************)
(* *)
(* PROJECT HELM *)
(* *)
(* A tactic to print Coq objects in XML *)
(* *)
(* Claudio Sacerdoti Coen <sacerdot@cs.unibo.it> *)
(* 18/10/2000 *)
(* *)
(* This module defines a pretty-printer and the stream of commands to the pp *)
(* *)
(******************************************************************************)
(* the type token for XML cdata, empty elements and not-empty elements *)
(* Usage: *)
(* Str cdata *)
(* Empty (element_name, [attrname1, value1 ; ... ; attrnamen, valuen] *)
(* NEmpty (element_name, [attrname1, value2 ; ... ; attrnamen, valuen], *)
(* content *)
type token = Str of string
| Empty of string * (string * string) list
| NEmpty of string * (string * string) list * token Stream.t
;;
(* currified versions of the constructors make the code more readable *)
let xml_empty name attrs = [< 'Empty(name,attrs) >]
let xml_nempty name attrs content = [< 'NEmpty(name,attrs,content) >]
let xml_cdata str = [< 'Str str >]
(* Usage: *)
(* pp tokens None pretty prints the output on stdout *)
(* pp tokens (Some filename) pretty prints the output on the file filename *)
let pp strm fn =
let channel = ref stdout in
let rec pp_r m =
parser
[< 'Str a ; s >] ->
print_spaces m ;
fprint_string (a ^ "\n") ;
pp_r m s
| [< 'Empty(n,l) ; s >] ->
print_spaces m ;
fprint_string ("<" ^ n) ;
List.iter (function (n,v) -> fprint_string (" " ^ n ^ "=\"" ^ v ^ "\"")) l;
fprint_string "/>\n" ;
pp_r m s
| [< 'NEmpty(n,l,c) ; s >] ->
print_spaces m ;
fprint_string ("<" ^ n) ;
List.iter (function (n,v) -> fprint_string (" " ^ n ^ "=\"" ^ v ^ "\"")) l;
fprint_string ">\n" ;
pp_r (m+1) c ;
print_spaces m ;
fprint_string ("</" ^ n ^ ">\n") ;
pp_r m s
| [< >] -> ()
and print_spaces m =
for i = 1 to m do fprint_string " " done
and fprint_string str =
output_string !channel str
in
match fn with
Some filename ->
let filename = filename ^ ".xml" in
channel := open_out filename ;
pp_r 0 strm ;
close_out !channel ;
print_string ("\nWriting on file \"" ^ filename ^ "\" was succesfull\n");
flush stdout
| None ->
pp_r 0 strm
;;
|
