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|
(* File: common.ml
Copyright (C) 2007-
Jane Street Holding, LLC
Author: Markus Mottl
email: mmottl\@janestreet.com
WWW: http://www.janestreet.com/ocaml
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
(* Common: common definitions used by binary protocol converters *)
open Printf
open Bigarray
type pos = int
(* Errors and exceptions *)
exception Buffer_short
exception No_variant_match
module ReadError = struct
(* Order of variants matters. It must jibe with read_stubs.c. *)
type t =
| Neg_int8
| Int_code
| Int_overflow
| Nat0_code
| Nat0_overflow
| Int32_code
| Int64_code
| Nativeint_code
| Unit_code
| Bool_code
| Option_code
| String_too_long
| Variant_tag
| Array_too_long
| Hashtbl_too_long
| Sum_tag of string
| Variant of string
| Poly_rec_bound of string
| Variant_wrong_type of string
| Silly_type of string
| Empty_type of string
let to_string = function
| Neg_int8 -> "Neg_int8"
| Int_code -> "Int_code"
| Int_overflow -> "Int_overflow"
| Nat0_code -> "Nat0_code"
| Nat0_overflow -> "Nat0_overflow"
| Int32_code -> "Int32_code"
| Int64_code -> "Int64_code"
| Nativeint_code -> "Nativeint_code"
| Unit_code -> "Unit_code"
| Bool_code -> "Bool_code"
| Option_code -> "Option_code"
| String_too_long -> "String_too_long"
| Variant_tag -> "Variant_tag"
| Array_too_long -> "Array_too_long"
| Hashtbl_too_long -> "Hashtbl_too_long"
| Sum_tag loc -> "Sum_tag / " ^ loc
| Variant loc -> "Variant / " ^ loc
| Poly_rec_bound loc -> "Poly_rec_bound / " ^ loc
| Variant_wrong_type loc -> "Variant_wrong_type / " ^ loc
| Silly_type loc -> "Silly_type / " ^ loc
| Empty_type loc -> "Empty_type / " ^ loc
end
exception Read_error of ReadError.t * pos
exception Read_exc of exn * pos
exception Poly_rec_write of string
exception Empty_type of string
let raise_read_error err pos = raise (Read_error (err, pos))
let raise_read_exc exc pos = raise (Read_exc (exc, pos))
let raise_concurrent_modification loc =
failwith (loc ^ ": concurrent modification")
let array_bound_error () = invalid_arg "index out of bounds"
(* Buffers *)
type pos_ref = pos ref
type buf = (char, int8_unsigned_elt, c_layout) Array1.t
let create_buf n = Array1.create Bigarray.char c_layout n
let check_pos (buf : buf) pos =
if pos >= Array1.dim buf then raise Buffer_short
let safe_get_pos buf pos_ref =
let pos = !pos_ref in
check_pos buf pos;
pos
let check_next (buf : buf) next =
if next > Array1.dim buf then raise Buffer_short
let get_opt_pos ~loc ~var = function
| Some pos ->
if pos < 0 then
invalid_arg (sprintf "Bin_prot.Common.%s: %s < 0" loc var);
pos
| None -> 0
external unsafe_blit_buf :
src_pos : int -> src : buf -> dst_pos : int -> dst : buf -> len : int -> unit
= "bin_prot_blit_buf_stub"
let blit_buf ?src_pos ~src ?dst_pos ~dst len =
let loc = "blit_buf" in
let src_pos = get_opt_pos ~loc ~var:"src_pos" src_pos in
let dst_pos = get_opt_pos ~loc ~var:"dst_pos" dst_pos in
if len < 0 then invalid_arg "Bin_prot.Common.blit_buf: len < 0"
else if len = 0 then (
if src_pos > Array1.dim src then
invalid_arg "Bin_prot.Common.blit_buf: src_pos > src_len";
if dst_pos > Array1.dim dst then
invalid_arg "Bin_prot.Common.blit_buf: dst_pos > dst_len")
else (
if src_pos + len > Array1.dim src then
invalid_arg "Bin_prot.Common.blit_buf: src_pos + len > src_len"
else if dst_pos + len > Array1.dim dst then
invalid_arg "Bin_prot.Common.blit_buf: dst_pos + len > dst_len"
else unsafe_blit_buf ~src_pos ~src ~dst_pos ~dst ~len)
external unsafe_blit_string_buf :
src_pos : int -> string -> dst_pos : int -> buf -> len : int -> unit
= "bin_prot_blit_string_buf_stub" "noalloc"
let blit_string_buf ?src_pos str ?dst_pos buf ~len =
let loc = "blit_string_buf" in
let src_pos = get_opt_pos ~loc ~var:"src_pos" src_pos in
let dst_pos = get_opt_pos ~loc ~var:"dst_pos" dst_pos in
if len < 0 then invalid_arg "Bin_prot.Common.blit_string_buf: len < 0"
else if len = 0 then (
if src_pos > String.length str then
invalid_arg "Bin_prot.Common.blit_string_buf: src_pos > str_len";
if dst_pos > Array1.dim buf then
invalid_arg "Bin_prot.Common.blit_string_buf: src_pos > buf")
else (
if src_pos + len > String.length str then
invalid_arg "Bin_prot.Common.blit_string_buf: src_pos + len > str_len"
else if dst_pos + len > Array1.dim buf then
invalid_arg "Bin_prot.Common.blit_string_buf: src_pos + len > buf"
else unsafe_blit_string_buf ~src_pos str ~dst_pos buf ~len)
external unsafe_blit_buf_string :
src_pos : int -> buf -> dst_pos : int -> string -> len : int -> unit
= "bin_prot_blit_buf_string_stub" "noalloc"
let blit_buf_string ?src_pos buf ?dst_pos str ~len =
let loc = "blit_buf_string" in
let src_pos = get_opt_pos ~loc ~var:"src_pos" src_pos in
let dst_pos = get_opt_pos ~loc ~var:"dst_pos" dst_pos in
if len < 0 then invalid_arg "Bin_prot.Common.blit_buf_string: len < 0"
else if len = 0 then (
if src_pos > Array1.dim buf then
invalid_arg "Bin_prot.Common.blit_buf_string: src_pos > buf_len";
if dst_pos > String.length str then
invalid_arg "Bin_prot.Common.blit_buf_string: src_pos > str_len")
else (
if src_pos + len > Array1.dim buf then
invalid_arg "Bin_prot.Common.blit_buf_string: src_pos + len > buf_len"
else if dst_pos + len > String.length str then
invalid_arg "Bin_prot.Common.blit_buf_string: src_pos + len > str_len"
else unsafe_blit_buf_string ~src_pos buf ~dst_pos str ~len)
(* Miscellaneous *)
let rec copy_htbl_list htbl = function
| [] -> htbl
| (k, v) :: rest -> Hashtbl.add htbl k v; copy_htbl_list htbl rest
external variant_of_int : int -> [> ] = "%identity"
(* Bigarrays *)
type vec32 = (float, float32_elt, fortran_layout) Array1.t
type vec64 = (float, float64_elt, fortran_layout) Array1.t
type vec = vec64
type mat32 = (float, float32_elt, fortran_layout) Array2.t
type mat64 = (float, float64_elt, fortran_layout) Array2.t
type mat = mat64
(* Initialisation *)
external init : unit -> unit = "bin_prot_common_init_stub"
let () =
Callback.register_exception "Bin_prot.Common.Buffer_short" Buffer_short;
init ()
|
