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|
(**************************************************************************)
(* *)
(* The Why platform for program certification *)
(* Copyright (C) 2002-2008 *)
(* Romain BARDOU *)
(* Jean-Franois COUCHOT *)
(* Mehdi DOGGUY *)
(* Jean-Christophe FILLITRE *)
(* Thierry HUBERT *)
(* Claude MARCH *)
(* Yannick MOY *)
(* Christine PAULIN *)
(* Yann RGIS-GIANAS *)
(* Nicolas ROUSSET *)
(* Xavier URBAIN *)
(* *)
(* This software is free software; you can redistribute it and/or *)
(* modify it under the terms of the GNU General Public *)
(* License version 2, as published by the Free Software Foundation. *)
(* *)
(* This software is distributed in the hope that it will be useful, *)
(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *)
(* *)
(* See the GNU General Public License version 2 for more details *)
(* (enclosed in the file GPL). *)
(* *)
(**************************************************************************)
(*i $Id: ctypes.ml,v 1.26 2008/02/05 12:10:47 marche Exp $ i*)
open Format
open Coptions
open Lib
type storage_class = No_storage | Extern | Auto | Static | Register
type sign = Signed | Unsigned
type cinteger =
| Char | Short | Int | Long | LongLong | Bitfield of int64
| ExactInt
type cfloat = Float | Double | LongDouble | Real
type valid = Valid of int64 * int64 | Not_valid
type ctype_node =
| Tvoid
| Tint of (sign * cinteger)
| Tfloat of cfloat
| Tvar of string
| Tarray of valid * ctype * int64 option
| Tpointer of valid * ctype
| Tstruct of string
| Tunion of string
| Tenum of string
| Tfun of ctype list * ctype
and ctype = {
ctype_node : ctype_node;
ctype_storage : storage_class;
ctype_const : bool;
ctype_volatile : bool;
ctype_ghost : bool;
}
let noattr tyn = { ctype_node = tyn;
ctype_storage = No_storage;
ctype_const = false;
ctype_volatile = false;
ctype_ghost = false;
}
let c_void = noattr Tvoid
let c_int = noattr (Tint (Signed, Int))
let c_exact_int = noattr (Tint (Signed, ExactInt))
let c_char = noattr (Tint (Unsigned, Char))
let c_float fk = noattr (Tfloat fk)
let c_string valid = noattr (Tpointer(valid, c_char))
let c_array valid ty = noattr (Tarray (valid,ty,None))
let c_array_size valid ty n = noattr (Tarray (valid,ty,Some n))
let c_pointer valid ty = noattr (Tpointer(valid, ty))
let c_void_star valid = c_pointer valid c_void
let c_real = noattr (Tfloat Real)
let c_addr = noattr (Tvar "addr")
let stack = ref [ref Sset.empty]
let add s = match !stack with
| m :: _ ->
if debug then eprintf "Ctypes.add %s@." s;
m := Sset.add s !m
| [] -> assert false
let _ = add "__builtin_va_list"
let remove s = match !stack with
| m :: _ ->
if debug then eprintf "Ctypes.remove %s@." s;
m := Sset.remove s !m
| [] -> assert false
let mem s = match !stack with
| m :: _ -> Sset.mem s !m
| [] -> assert false
let push () = match !stack with
| (m :: _) as s -> stack := ref !m :: s
| [] -> assert false
let pop () = match !stack with
| _ :: s -> stack := s
| [] -> assert false
let rec ctype fmt ty =
(if ty.ctype_ghost then fprintf fmt "ghost "else ());
(if ty.ctype_const then fprintf fmt "const "else ());
ctype_node fmt ty.ctype_node
and ctype_node fmt = function
| Tvoid -> fprintf fmt "void"
| Tint _ -> fprintf fmt "int"
| Tfloat _ -> fprintf fmt "float"
| Tvar s -> fprintf fmt "%s" s
| Tarray (_,ty, None) -> fprintf fmt "%a[]" ctype ty
| Tarray (_,ty, Some n) -> fprintf fmt "%a[%Ld]" ctype ty n
| Tpointer (_,ty) -> fprintf fmt "%a*" ctype ty
| Tstruct s -> fprintf fmt "struct %s" s
| Tunion s -> fprintf fmt "union %s" s
| Tenum s -> fprintf fmt "enum %s" s
| Tfun _ -> fprintf fmt "<fun>"
let is_pointer ty =
match ty.ctype_node with
| Tarray _ | Tpointer _ -> true
| _ -> false
|
