ocaml/typing/primitive.ml

59 lines
2.5 KiB
OCaml

(***********************************************************************)
(* *)
(* Objective Caml *)
(* *)
(* Xavier Leroy, projet Cristal, INRIA Rocquencourt *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* Automatique. Distributed only by permission. *)
(* *)
(***********************************************************************)
(* $Id$ *)
(* Description of primitive functions *)
open Misc
open Format
type description =
{ prim_name: string; (* Name of primitive or C function *)
prim_arity: int; (* Number of arguments *)
prim_alloc: bool; (* Does it allocates or raise? *)
prim_native_name: string; (* Name of C function for the nat. code gen. *)
prim_native_float: bool } (* Does the above operate on unboxed floats? *)
let parse_declaration arity decl =
match decl with
name :: "noalloc" :: name2 :: "float" :: _ ->
{prim_name = name; prim_arity = arity; prim_alloc = false;
prim_native_name = name2; prim_native_float = true}
| name :: "noalloc" :: name2 :: _ ->
{prim_name = name; prim_arity = arity; prim_alloc = false;
prim_native_name = name2; prim_native_float = false}
| name :: name2 :: "float" :: _ ->
{prim_name = name; prim_arity = arity; prim_alloc = true;
prim_native_name = name2; prim_native_float = true}
| name :: "noalloc" :: _ ->
{prim_name = name; prim_arity = arity; prim_alloc = false;
prim_native_name = ""; prim_native_float = false}
| name :: name2 :: _ ->
{prim_name = name; prim_arity = arity; prim_alloc = true;
prim_native_name = name2; prim_native_float = false}
| name :: _ ->
{prim_name = name; prim_arity = arity; prim_alloc = true;
prim_native_name = ""; prim_native_float = false}
| [] ->
fatal_error "Primitive.parse_declaration"
let print_quoted s = print_char '"'; print_string s; print_char '"'
let print_description p =
print_quoted p.prim_name;
if not p.prim_alloc then
(print_space(); print_quoted "noalloc");
if p.prim_native_name <> "" then
(print_space(); print_quoted p.prim_native_name);
if p.prim_native_float then
(print_space(); print_quoted "float")