File: lexHint.mll

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(****************************************************************************)
(*                           the diy toolsuite                              *)
(*                                                                          *)
(* Jade Alglave, University College London, UK.                             *)
(* Luc Maranget, INRIA Paris-Rocquencourt, France.                          *)
(*                                                                          *)
(* Copyright 2011-present Institut National de Recherche en Informatique et *)
(* en Automatique and the authors. All rights reserved.                     *)
(*                                                                          *)
(* This software is governed by the CeCILL-B license under French law and   *)
(* abiding by the rules of distribution of free software. You can use,      *)
(* modify and/ or redistribute the software under the terms of the CeCILL-B *)
(* license as circulated by CEA, CNRS and INRIA at the following URL        *)
(* "http://www.cecill.info". We also give a copy in LICENSE.txt.            *)
(****************************************************************************)

{
open Lexing
open LexMisc

let fconcat d1 d2 = match d1 with
| "." -> d2
| _ ->
    if Filename.is_relative d2 then
      Filename.concat d1 d2
    else
      d2

let do_include lex fname =
  Misc.input_protect
    (fun chan ->
      try
        let lexbuf = Lexing.from_channel chan in
        lexbuf.lex_curr_p <- { lexbuf.lex_curr_p with pos_fname=fname;};
        lex lexbuf
      with Error (msg,pos) ->
        Printf.eprintf
	"%a: Lex error %s (in %s)\n" Pos.pp_pos pos msg fname ;
      raise Misc.Exit)
    fname

}

let space = [' ''\t''\r']
let non_space = [^' ''\t''\n']
let non_space_eq = [^'='' ''\t''\n']

rule main dir get acc = parse
| "#include" space+ (non_space+ as fname) '\n'
    {
     let dir0 = Filename.dirname fname in
     let d = fconcat dir dir0 in
     let n = fconcat dir fname in
     let acc = do_include (main d get acc) n in
     incr_lineno lexbuf;
     main dir get acc lexbuf
   }
| '#' [^'\n']* '\n'
   { incr_lineno lexbuf; main dir get acc lexbuf }

| (non_space_eq+ as name) space+
  (non_space_eq+ as key) (space+|(space* '=' space*))
  ("" | (non_space_eq [^'\n']+) as v)
  '\n'
{ incr_lineno lexbuf; main dir get (get acc name key v) lexbuf }

| eof { acc }

| "" { error "lexHint" lexbuf }

{
 let read fname get acc =
   let dir = Filename.dirname fname in
   do_include (main dir get acc) fname
}