146 lines
4.2 KiB
OCaml
146 lines
4.2 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Objective Caml *)
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(* *)
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(* Luc Maranget, projet Moscova, *)
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(* INRIA Rocquencourt *)
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(* *)
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(* Copyright 2002 Institut National de Recherche en Informatique et *)
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(* en Automatique. All rights reserved. This file is distributed *)
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(* under the terms of the Q Public License version 1.0. *)
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(* *)
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(***********************************************************************)
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open Printf
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open Syntax
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open Lexgen
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(* To copy the ML code fragments *)
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type line_tracker = {
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file : string;
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oc : out_channel;
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ic : in_channel;
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mutable cur_line : int;
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};;
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let open_tracker file oc = {
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file = file;
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oc = oc;
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ic = open_in_bin file;
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cur_line = 1;
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};;
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let close_tracker tr = close_in_noerr tr.ic;;
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let update_tracker tr =
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fprintf tr.oc "\n";
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flush tr.oc;
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let cr_seen = ref false in
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try while true do
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match input_char tr.ic with
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| '\010' when not !cr_seen -> tr.cur_line <- tr.cur_line + 1;
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| '\013' -> cr_seen := true; tr.cur_line <- tr.cur_line + 1;
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| _ -> cr_seen := false;
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done with End_of_file ->
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fprintf tr.oc "# %d \"%s\"\n" (tr.cur_line+1) tr.file;
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;;
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let copy_buffer = String.create 1024
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let copy_chars_unix ic oc start stop =
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let n = ref (stop - start) in
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while !n > 0 do
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let m = input ic copy_buffer 0 (min !n 1024) in
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output oc copy_buffer 0 m;
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n := !n - m
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done
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let copy_chars_win32 ic oc start stop =
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for i = start to stop - 1 do
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let c = input_char ic in
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if c <> '\r' then output_char oc c
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done
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let copy_chars =
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match Sys.os_type with
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"Win32" | "Cygwin" -> copy_chars_win32
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| _ -> copy_chars_unix
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let copy_chunk sourcefile ic oc trl loc =
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if loc.start_pos < loc.end_pos then begin
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fprintf oc "# %d \"%s\"\n" loc.start_line sourcefile;
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for i = 1 to loc.start_col do output_char oc ' ' done;
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seek_in ic loc.start_pos;
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copy_chars ic oc loc.start_pos loc.end_pos;
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update_tracker trl;
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end
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(* Various memory actions *)
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let output_mem_access oc i = fprintf oc "lexbuf.Lexing.lex_mem.(%d)" i
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let output_memory_actions pref oc = function
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| [] -> ()
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| mvs ->
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output_string oc "(* " ;
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fprintf oc "L=%d " (List.length mvs) ;
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List.iter
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(fun mv -> match mv with
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| Copy (tgt, src) ->
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fprintf oc "[%d] <- [%d] ;" tgt src
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| Set tgt ->
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fprintf oc "[%d] <- p ; " tgt)
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mvs ;
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output_string oc " *)\n" ;
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List.iter
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(fun mv -> match mv with
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| Copy (tgt, src) ->
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fprintf oc
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"%s%a <- %a ;\n"
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pref output_mem_access tgt output_mem_access src
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| Set tgt ->
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fprintf oc "%s%a <- lexbuf.Lexing.lex_curr_pos ;\n"
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pref output_mem_access tgt)
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mvs
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let output_base_mem oc = function
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| Mem i -> output_mem_access oc i
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| Start -> fprintf oc "lexbuf.Lexing.lex_start_pos"
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| End -> fprintf oc "lexbuf.Lexing.lex_curr_pos"
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let output_tag_access oc = function
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| Sum (a,0) ->
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output_base_mem oc a
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| Sum (a,i) ->
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fprintf oc "(%a + %d)" output_base_mem a i
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let output_env oc env =
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let pref = ref "let" in
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match env with
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| [] -> ()
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| _ ->
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List.iter
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(fun (x,v) ->
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begin match v with
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| Ident_string (o,nstart,nend) ->
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fprintf oc
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"\n %s %s = Lexing.sub_lexeme%s lexbuf %a %a"
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!pref x (if o then "_opt" else "")
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output_tag_access nstart output_tag_access nend
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| Ident_char (o,nstart) ->
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fprintf oc
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"\n %s %s = Lexing.sub_lexeme_char%s lexbuf %a"
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!pref x (if o then "_opt" else "")
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output_tag_access nstart
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end ;
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pref := "and")
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env ;
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fprintf oc " in\n"
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(* Output the user arguments *)
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let output_args oc args =
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List.iter (fun x -> (output_string oc x; output_char oc ' ')) args
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