/
bson.ml
1131 lines (986 loc) · 39.4 KB
/
bson.ml
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(*
Copyright © 2011, 2012 MLstate
This file is part of OPA.
OPA is free software: you can redistribute it and/or modify it under the
terms of the GNU Affero General Public License, version 3, as published by
the Free Software Foundation.
OPA 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 Affero General Public License for
more details.
You should have received a copy of the GNU Affero General Public License
along with OPA. If not, see <http://www.gnu.org/licenses/>.
*)
(*#<Debugvar:MONGO_DEBUG>*)
module type S_sig =
sig
type t
val empty : t
val length : t -> int
val get : t -> int -> char
val set : t -> int -> char -> unit
val create : int -> t
val make : int -> char -> t
val copy : t -> t
val sub : t -> int -> int -> t
val fill : t -> int -> int -> char -> unit
val blit : t -> int -> t -> int -> int -> unit
val concat : t -> t list -> t
val iter : (char -> unit) -> t -> unit
val escaped : t -> t
val index : t -> char -> int
val rindex : t -> char -> int
val index_from : t -> int -> char -> int
val rindex_from : t -> int -> char -> int
val contains : t -> char -> bool
val contains_from : t -> int -> char -> bool
val rcontains_from : t -> int -> char -> bool
val uppercase : t -> t
val lowercase : t -> t
val capitalize : t -> t
val uncapitalize : t -> t
val compare : t -> t -> int
val unsafe_get : t -> int -> char
val unsafe_set : t -> int -> char -> unit
val unsafe_blit : t -> int -> t -> int -> int -> unit
val unsafe_fill : t -> int -> int -> char -> unit
val to_string : t -> string
val of_string : string -> t
val export : t -> string * int * int
val import : string * int * int -> t
val widen : t -> unit
val normalize : t -> t
val real_size : t -> int
val set_size : t -> int -> t
val rebase : t -> unit
val unsafe_sub : t -> int -> int -> t
end
module S : S_sig with type t = string =
struct
include BaseString
let empty = ""
let to_string s = s
let of_string s = s
let export s = (s,0,String.length s)
let import (str,base,len) = String.sub str base len
let widen _ = ()
let normalize s = s
let real_size s = String.length s
let set_size s _ = s
let rebase _ = ()
let unsafe_sub = String.sub
end
module type FILLBUF =
sig
type t
val get : t -> int -> char
val set : t -> int -> char -> unit
end
module FillbufF (S : FILLBUF) =
struct
let lei32 s pos i =
S.set s (pos+3) (Char.chr ((i lsr 24) land 0xff));
S.set s (pos+2) (Char.chr ((i lsr 16) land 0xff));
S.set s (pos+1) (Char.chr ((i lsr 8 ) land 0xff));
S.set s (pos+0) (Char.chr ( i land 0xff))
let bei32 s pos i =
S.set s (pos+0) (Char.chr ((i lsr 24) land 0xff));
S.set s (pos+1) (Char.chr ((i lsr 16) land 0xff));
S.set s (pos+2) (Char.chr ((i lsr 8 ) land 0xff));
S.set s (pos+3) (Char.chr ( i land 0xff))
let led s pos f =
let b = Int64.bits_of_float f in
S.set s (pos+7) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 56) 0xffL)));
S.set s (pos+6) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 48) 0xffL)));
S.set s (pos+5) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 40) 0xffL)));
S.set s (pos+4) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 32) 0xffL)));
S.set s (pos+3) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 24) 0xffL)));
S.set s (pos+2) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 16) 0xffL)));
S.set s (pos+1) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 8 ) 0xffL)));
S.set s (pos+0) (Char.chr (Int64.to_int (Int64.logand ( b ) 0xffL)))
let bed s pos f =
let b = Int64.bits_of_float f in
S.set s (pos+0) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 56) 0xffL)));
S.set s (pos+1) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 48) 0xffL)));
S.set s (pos+2) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 40) 0xffL)));
S.set s (pos+3) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 32) 0xffL)));
S.set s (pos+4) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 24) 0xffL)));
S.set s (pos+5) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 16) 0xffL)));
S.set s (pos+6) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical b 8 ) 0xffL)));
S.set s (pos+7) (Char.chr (Int64.to_int (Int64.logand ( b ) 0xffL)))
let lei32l s pos i32 =
S.set s (pos+3) (Char.chr (Int32.to_int (Int32.logand (Int32.shift_right_logical i32 24) 0xffl)));
S.set s (pos+2) (Char.chr (Int32.to_int (Int32.logand (Int32.shift_right_logical i32 16) 0xffl)));
S.set s (pos+1) (Char.chr (Int32.to_int (Int32.logand (Int32.shift_right_logical i32 8 ) 0xffl)));
S.set s (pos+0) (Char.chr (Int32.to_int (Int32.logand ( i32 ) 0xffl)))
let bei32l s pos i32 =
S.set s (pos+0) (Char.chr (Int32.to_int (Int32.logand (Int32.shift_right_logical i32 24) 0xffl)));
S.set s (pos+1) (Char.chr (Int32.to_int (Int32.logand (Int32.shift_right_logical i32 16) 0xffl)));
S.set s (pos+2) (Char.chr (Int32.to_int (Int32.logand (Int32.shift_right_logical i32 8 ) 0xffl)));
S.set s (pos+3) (Char.chr (Int32.to_int (Int32.logand ( i32 ) 0xffl)))
let lei64L s pos i64 =
S.set s (pos+7) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 56) 0xffL)));
S.set s (pos+6) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 48) 0xffL)));
S.set s (pos+5) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 40) 0xffL)));
S.set s (pos+4) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 32) 0xffL)));
S.set s (pos+3) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 24) 0xffL)));
S.set s (pos+2) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 16) 0xffL)));
S.set s (pos+1) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 8 ) 0xffL)));
S.set s (pos+0) (Char.chr (Int64.to_int (Int64.logand ( i64 ) 0xffL)))
let bei64L s pos i64 =
S.set s (pos+0) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 56) 0xffL)));
S.set s (pos+1) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 48) 0xffL)));
S.set s (pos+2) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 40) 0xffL)));
S.set s (pos+3) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 32) 0xffL)));
S.set s (pos+4) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 24) 0xffL)));
S.set s (pos+5) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 16) 0xffL)));
S.set s (pos+6) (Char.chr (Int64.to_int (Int64.logand (Int64.shift_right_logical i64 8 ) 0xffL)));
S.set s (pos+7) (Char.chr (Int64.to_int (Int64.logand ( i64 ) 0xffL)))
let ldi32l s i =
(Int32.logor (Int32.logand (Int32.shift_left (Int32.of_int (Char.code (S.get (s) (i+3)))) 24) 0x00000000ff000000l)
(Int32.logor (Int32.logand (Int32.shift_left (Int32.of_int (Char.code (S.get (s) (i+2)))) 16) 0x0000000000ff0000l)
(Int32.logor (Int32.logand (Int32.shift_left (Int32.of_int (Char.code (S.get (s) (i+1)))) 8) 0x000000000000ff00l)
(Int32.logand ( (Int32.of_int (Char.code (S.get (s) (i+0)))) ) 0x00000000000000ffl))))
let bdi32l s i =
(Int32.logor (Int32.logand (Int32.shift_left (Int32.of_int (Char.code (S.get (s) (i+0)))) 24) 0x00000000ff000000l)
(Int32.logor (Int32.logand (Int32.shift_left (Int32.of_int (Char.code (S.get (s) (i+1)))) 16) 0x0000000000ff0000l)
(Int32.logor (Int32.logand (Int32.shift_left (Int32.of_int (Char.code (S.get (s) (i+2)))) 8) 0x000000000000ff00l)
(Int32.logand ( (Int32.of_int (Char.code (S.get (s) (i+3)))) ) 0x00000000000000ffl))))
let ldi32 s i = Int32.to_int(ldi32l s i)
let bdi32 s i = Int32.to_int(bdi32l s i)
let ldi64L s i =
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+7)))) 56) 0xff00000000000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+6)))) 48) 0x00ff000000000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+5)))) 40) 0x0000ff0000000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+4)))) 32) 0x000000ff00000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+3)))) 24) 0x00000000ff000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+2)))) 16) 0x0000000000ff0000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+1)))) 8) 0x000000000000ff00L)
(Int64.logand ( (Int64.of_int (Char.code (S.get (s) (i+0)))) ) 0x00000000000000ffL))))))))
let bdi64L s i =
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+0)))) 56) 0xff00000000000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+1)))) 48) 0x00ff000000000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+2)))) 40) 0x0000ff0000000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+3)))) 32) 0x000000ff00000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+4)))) 24) 0x00000000ff000000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+5)))) 16) 0x0000000000ff0000L)
(Int64.logor (Int64.logand (Int64.shift_left (Int64.of_int (Char.code (S.get (s) (i+6)))) 8) 0x000000000000ff00L)
(Int64.logand ( (Int64.of_int (Char.code (S.get (s) (i+7)))) ) 0x00000000000000ffL))))))))
let ldd s i = Int64.float_of_bits (ldi64L s i)
let bdd s i = Int64.float_of_bits (bdi64L s i)
end (* module FillbufF *)
module FillbufString = FillbufF(String)
let add_le_int32 b i =
if Buf.spare b <= 4 then Buf.resize b 4;
FillbufString.lei32 b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 4
let add_be_int32 b i =
if Buf.spare b <= 4 then Buf.resize b 4;
FillbufString.bei32 b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 4
let add_le_d b i =
if Buf.spare b <= 8 then Buf.resize b 8;
FillbufString.led b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 8
let add_be_d b i =
if Buf.spare b <= 8 then Buf.resize b 8;
FillbufString.bed b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 8
let add_le_int32l b i =
if Buf.spare b <= 4 then Buf.resize b 4;
FillbufString.lei32l b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 4
let add_be_int32l b i =
if Buf.spare b <= 4 then Buf.resize b 4;
FillbufString.bei32l b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 4
let add_le_int64L b i =
if Buf.spare b <= 8 then Buf.resize b 8;
FillbufString.lei64L b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 8
let add_be_int64L b i =
if Buf.spare b <= 4 then Buf.resize b 4;
FillbufString.bei64L b.Buf.str b.Buf.i i;
b.Buf.i <- b.Buf.i + 8
module St = FillbufF(S)
module SS = BaseStringSlice
let sprintf = Printf.sprintf
let fprintf = Printf.fprintf
(* Element codes *)
let el_eoo = '\x00' (* End of object? *)
let el_double = '\x01' (* double Floating point *)
let el_string = '\x02' (* string UTF-8 string *)
let el_object = '\x03' (* document Embedded document *)
let el_array = '\x04' (* document Array *)
let el_bindata = '\x05' (* binary Binary data *)
let el_undefined = '\x06' (* Undefined — Deprecated *)
let el_oid = '\x07' (* (byte*12) ObjectId *)
let el_bool = '\x08' (* "\x00" Boolean "false"
"\x01" Boolean "true" *)
let el_date = '\x09' (* int64 UTC datetime *)
let el_null = '\x0A' (* Null value *)
let el_regex = '\x0B' (* cstring cstring Regular expression *)
let el_dbref = '\x0C' (* string (byte*12) DBPointer — Deprecated *)
let el_code = '\x0D' (* string JavaScript code *)
let el_symbol = '\x0E' (* string Symbol *)
let el_codewscope = '\x0F' (* code_w_s JavaScript code w/ scope *)
let el_int = '\x10' (* int32 32-bit Integer *)
let el_timestamp = '\x11' (* int64 Timestamp *)
let el_long = '\x12' (* int64 64-bit integer *)
let el_minkey = '\xFF' (* Min key *)
let el_maxkey = '\x7F' (* Max key *)
(* Binary subtype *)
let st_bin_binary = '\x00'
let st_bin_func = '\x01'
let st_bin_binary_old = '\x02'
let st_bin_uuid = '\x03'
let st_bin_md5 = '\x05'
let st_bin_user = '\x80'
(* Types *)
type buf =
{ buf: Buf.buf;
mutable stack : int list;
mutable finished : bool;
}
(* Object identifiers *)
module Oid =
struct
let from_string str =
let oid = S.create 12 in
for i = 0 to 11 do
oid.[i] <- Char.chr (Charf.c2h str.[i*2] str.[i*2+1]);
done;
oid
let to_string oid =
let hex = [|'0';'1';'2';'3';'4';'5';'6';'7';'8';'9';'a';'b';'c';'d';'e';'f'|] in
let str = S.create 24 in
for i = 0 to 11 do
str.[2*i] <- hex.(((Char.code oid.[i]) land 0xf0) lsr 4);
str.[2*i+1] <- hex.((Char.code oid.[i]) land 0x0f);
done;
str
let counter = ref 0
let gen () =
let s = S.create 12 in
St.bei32 s 0 (int_of_float (Time.in_seconds(Time.now())));
St.lei32l s 4 (Random.int32 Int32.max_int);
St.bei32 s 8 (incr counter; !counter);
s
let generated_time oid =
Time.seconds_float (Int32.to_float (St.bdi32l oid 0))
end (* module Oid *)
module Append =
struct
let init ?(hint=100) () : buf =
if hint < 5 then raise (Failure "init: ridiculous hint value");
let b = { buf=Buf.create hint; stack=[]; finished=false; } in
b.buf.Buf.i <- 4;
b
let empty =
let b = { buf = Buf.of_string "\x05\x00\x00\x00\x00";
stack = [];
finished = true;
} in
b.buf.Buf.i <- 4;
b
let size b =
if not b.finished
then 0
else St.ldi32 b.buf.Buf.str 0
let estart b _type name =
Buf.add_char b.buf _type;
Buf.add_string b.buf name;
Buf.add_char b.buf '\x00'
let int b name i =
estart b el_int name;
add_le_int32l b.buf i
let long b name l =
estart b el_long name;
add_le_int64L b.buf l
let double b name d =
estart b el_double name;
add_le_d b.buf d
let bool b name _b =
estart b el_bool name;
Buf.add_char b.buf (if _b then '\x01' else '\x00')
let null b name =
estart b el_null name
let minkey b name =
estart b el_minkey name
let maxkey b name =
estart b el_maxkey name
let undefined b name =
estart b el_undefined name
let string_base b name value len _type =
estart b _type name;
add_le_int32 b.buf (len+1);
Buf.append b.buf value len;
Buf.add_char b.buf '\x00'
let string b name value =
string_base b name value (S.length value) el_string
let symbol b name value =
string_base b name value (S.length value) el_symbol
let code b name value =
string_base b name value (S.length value) el_code
let string_n b name value len =
string_base b name value len el_string
let symbol_n b name value len =
string_base b name value len el_symbol
let code_n b name value len =
string_base b name value len el_code
let code_w_scope_n b name code len scope =
let slen = len + 1 in
let ssize = size scope in
let size = slen + ssize + 8 in
estart b el_codewscope name;
add_le_int32 b.buf size;
add_le_int32 b.buf slen;
Buf.append b.buf code len;
Buf.add_char b.buf '\x00';
Buf.append b.buf scope.buf.Buf.str ssize
let start_codewscope b name code =
let len = S.length code in
estart b el_codewscope name;
b.stack <- b.buf.Buf.i :: b.stack;
add_le_int32 b.buf 0;
add_le_int32 b.buf (len+1);
Buf.append b.buf code len;
Buf.add_char b.buf '\x00';
b.stack <- b.buf.Buf.i :: b.stack;
add_le_int32 b.buf 0
let finish_codewscope b code =
Buf.add_char b.buf '\x00';
let len = S.length code in
let start = List.hd b.stack in
b.stack <- List.tl b.stack;
let ssize = b.buf.Buf.i - start in
St.lei32 b.buf.Buf.str start ssize;
let size = len + ssize + 9 in
let start = List.hd b.stack in
b.stack <- List.tl b.stack;
St.lei32 b.buf.Buf.str start size
let code_w_scope b name code scope =
code_w_scope_n b name code (S.length code) scope
let binary b name _type str len =
if _type = st_bin_binary_old
then (estart b el_bindata name;
add_le_int32 b.buf (len+4);
Buf.add_char b.buf _type;
add_le_int32 b.buf len;
Buf.append b.buf str len)
else (estart b el_bindata name;
add_le_int32 b.buf len;
Buf.add_char b.buf _type;
Buf.append b.buf str len)
let oid b name oid =
estart b el_oid name;
Buf.append b.buf oid 12
let new_oid b name =
oid b name (Oid.gen ())
let regex b name pattern opts =
let plen = S.length pattern in
let olen = S.length opts in
estart b el_regex name;
Buf.append b.buf pattern plen;
Buf.add_char b.buf '\x00';
Buf.append b.buf opts olen;
Buf.add_char b.buf '\x00'
let bson b name bson =
let bsize = size bson in
estart b el_object name;
Buf.append b.buf bson.buf.Buf.str bsize
let timestamp b name (i,t) =
estart b el_timestamp name;
add_le_int32l b.buf i;
add_le_int32l b.buf t
let date b name millis =
estart b el_date name;
add_le_int64L b.buf millis
let time_t b name t =
date b name (Int64.of_int (Time.in_milliseconds t))
let start_object b name =
estart b el_object name;
b.stack <- b.buf.Buf.i :: b.stack;
add_le_int32 b.buf 0
let start_array b name =
estart b el_array name;
b.stack <- b.buf.Buf.i :: b.stack;
add_le_int32 b.buf 0
let finish_object b =
Buf.add_char b.buf '\x00';
let start = List.hd b.stack in
b.stack <- List.tl b.stack;
St.lei32 b.buf.Buf.str start (b.buf.Buf.i - start)
let finish_array b =
finish_object b
let finish b =
if not b.finished
then (Buf.add_char b.buf '\x00';
St.lei32 b.buf.Buf.str 0 b.buf.Buf.i;
b.finished <- true)
let get b =
if not b.finished then raise (Failure "get: not finished");
S.sub b.buf.Buf.str 0 b.buf.Buf.i
end (* module Append *)
module type Iterator_sig =
sig
module S : S_sig
type iter = { ibuf : S.t; mutable pos : int; mutable first : bool; }
val init : buf -> iter
val from_buffer : S.t -> iter
val iterator_type : iter -> char
val key : iter -> string
val value : iter -> int
val int_raw : iter -> int32
val long_raw : iter -> int64
val double_raw : iter -> float
val bool_raw : iter -> bool
val oid : iter -> string
val string : ?offset:int -> iter -> string
val symbol : ?offset:int -> iter -> string
val cstring : ?offset:int -> iter -> string
val string_len : iter -> int
val int : iter -> int32
val long : iter -> int64
val double : iter -> float
val timestamp : iter -> int32 * int32
val bool : iter -> bool
val code : iter -> string
val code_scope : iter -> buf
val date : iter -> int64
val time_t : iter -> Time.t
val bin_type : iter -> char
val bin_len : iter -> int
val bin_data : iter -> string
val regex : iter -> string
val regex_opts : iter -> string
val subobject : iter -> buf
val subiterator : iter -> iter
val next : iter -> char
val find : buf -> string -> iter * char
end
module IteratorF(S : S_sig) : Iterator_sig with module S = S =
struct
module S = S
module St = FillbufF(S)
type iter =
{ ibuf : S.t;
mutable pos : int;
mutable first : bool;
}
let init b =
{ ibuf = S.of_string b.buf.Buf.str;
pos = 4;
first = true;
}
let from_buffer buffer =
{ ibuf = buffer;
pos = 4;
first = true;
}
let iterator_type i = S.get i.ibuf i.pos
let key i =
try
let ks = i.pos + 1 in
S.to_string (S.sub i.ibuf ks ((S.index_from i.ibuf ks '\x00') - ks))
with Not_found -> ""
let value i =
try (S.index_from i.ibuf (i.pos+1) '\x00') + 1
with Not_found -> S.length i.ibuf
let int_raw i =
St.ldi32l i.ibuf (value i)
let long_raw i =
St.ldi64L i.ibuf (value i)
let double_raw i =
St.ldd i.ibuf (value i)
let bool_raw i =
match S.get i.ibuf (value i) with
| '\x00' -> false
| '\x01' -> true
| c -> raise (Failure (sprintf "iterator_bool_raw: Unknown code %02x" (Char.code c)))
let oid i =
S.to_string (S.sub i.ibuf (value i) 12)
let string ?(offset=4) i =
let v = value i in
S.to_string (S.sub i.ibuf (v+offset) ((St.ldi32 i.ibuf v)-1))
let symbol = string
let bslen s i =
try (S.index_from s i '\x00') + 1 - i
with Not_found -> S.length s - i
let cstring ?(offset=0) i =
let v = value i in
S.to_string (S.sub i.ibuf (v+offset) ((bslen i.ibuf (v+offset))-1))
let string_len i =
Int32.to_int(int_raw i) - 1
let int i =
match S.get i.ibuf (i.pos) with
| c when c = el_int -> int_raw i
| c when c = el_long -> Int64.to_int32 (long_raw i)
| c when c = el_double -> Int32.of_float (double_raw i)
| _ -> 0l
let long i =
match S.get i.ibuf (i.pos) with
| c when c = el_int -> Int64.of_int32(int_raw i)
| c when c = el_long -> long_raw i
| c when c = el_double -> Int64.of_float (double_raw i)
| _ -> 0L
let double i =
match S.get i.ibuf (i.pos) with
| c when c = el_int -> Int32.to_float (int_raw i)
| c when c = el_long -> Int64.to_float (long_raw i)
| c when c = el_double -> double_raw i
| _ -> 0.0
let timestamp i =
let v = value i in
(St.ldi32l i.ibuf v, St.ldi32l i.ibuf (v+4))
let bool i =
match S.get i.ibuf (i.pos) with
| c when c = el_bool -> bool_raw i
| c when c = el_int -> int_raw i <> 0l
| c when c = el_long -> long_raw i <> 0L
| c when c = el_double -> double_raw i <> 0.0
| c when c = el_eoo || c = el_null -> false
| _ -> true
let code i =
match S.get i.ibuf i.pos with
| c when c = el_string || c = el_code -> string ~offset:4 i
| c when c = el_codewscope ->
let v = value i in
S.to_string (S.sub i.ibuf (v+8) ((St.ldi32 i.ibuf (v+4))-1))
| _ -> ""
let code_scope i =
match S.get i.ibuf i.pos with
| c when c = el_codewscope ->
let v = value i in
let code_len = St.ldi32 i.ibuf (v+4) in
let scope_len = St.ldi32 i.ibuf (v+8+code_len) in
let b = { buf = Buf.of_string (S.to_string (S.sub i.ibuf (v+8+code_len) scope_len));
stack = [];
finished = true;
} in
b.buf.Buf.i <- 4;
b
| _ -> Append.empty
let date i =
long_raw i
let time_t i =
Time.milliseconds (Int64.to_int (date i))
let bin_type i =
S.get i.ibuf (value i + 4)
let bin_len i =
if bin_type i = st_bin_binary_old
then Int32.to_int(int_raw i) - 4
else Int32.to_int(int_raw i)
let bin_data i =
let v = value i in
let offset = if bin_type i = st_bin_binary_old then 9 else 5 in
S.to_string (S.sub i.ibuf (v+offset) (bin_len i))
let regex i =
cstring i
let regex_opts i =
let v = value i in
let offset = bslen i.ibuf v in
S.to_string (S.sub i.ibuf (v+offset) ((bslen i.ibuf (v+offset))-1))
let subobject i =
let v = value i in
let len = St.ldi32 i.ibuf v in
let b = { buf = Buf.of_string (S.to_string (S.sub i.ibuf v len));
stack = [];
finished = true;
} in
b.buf.Buf.i <- 4;
b
let subiterator i =
{ ibuf = i.ibuf;
pos = value i + 4;
first = true;
}
let next i =
if i.first || S.get i.ibuf i.pos = el_eoo
then (i.first <- false; S.get i.ibuf i.pos)
else
let ds =
match S.get i.ibuf i.pos with
| c when c = el_undefined || c = el_null || c = el_minkey || c = el_maxkey ->
0
| c when c = el_bool ->
1
| c when c = el_int ->
4
| c when c = el_long || c = el_double || c = el_timestamp || c = el_date ->
8
| c when c = el_oid ->
12
| c when c = el_string || c = el_symbol || c = el_code ->
4 + Int32.to_int(int_raw i)
| c when c = el_bindata ->
5 + Int32.to_int(int_raw i)
| c when c = el_object || c = el_array || c = el_codewscope ->
Int32.to_int(int_raw i)
| c when c = el_dbref ->
16 + Int32.to_int(int_raw i)
| c when c = el_regex ->
let s = value i in
let p = (S.index_from i.ibuf s '\x00') + 1 in
let p = (S.index_from i.ibuf p '\x00') + 1 in
p-s
| c -> raise (Failure (sprintf "next: Unknown code %02x" (Char.code c)))
in
i.pos <- i.pos + (1 + (bslen i.ibuf (i.pos+1)) + ds);
S.get i.ibuf i.pos
let find obj name =
let i = init obj in
let rec aux () =
let c = next i in
if c = el_eoo
then i, el_eoo
else
if name = key i
then i, c
else aux ()
in
aux ()
end (* module Iterator *)
module Iterator : Iterator_sig with module S = S = IteratorF(S)
module IteratorSS : Iterator_sig with module S = SS = IteratorF(SS)
(* Module dependencies, we need Iterator, even though it's an Append function *)
(*
module Element =
struct
let element b name_opt elem =
let next = { Iterator.ibuf = elem.Iterator.ibuf; pos = elem.Iterator.pos; first = elem.Iterator.first } in
ignore (Iterator.next next);
let size = next.Iterator.pos - elem.Iterator.pos in
match name_opt with
| Some name ->
let data_size = size - S.length (Iterator.key elem) - 2 in
Append.estart b (S.get elem.Iterator.ibuf 0) name data_size;
Append.append b ~offset:(Iterator.value elem) name data_size
| None ->
Append.append b (S.to_string elem.Iterator.ibuf) size
end (* module Element *)
*)
module Print =
struct
let rec print b =
print_raw b.buf.Buf.str 0 0
and print_raw str i depth =
let i = { Iterator.ibuf = S.of_string str; pos = i+4; first = true; } in
let rec aux () =
ignore (Iterator.next i);
let t = Iterator.iterator_type i in
if t <> el_eoo
then
let key = Iterator.key i in
Printf.printf "%s" (S.make depth '\t');
Printf.printf "%s : %02x \t" key (Char.code t);
(match t with
| c when c = el_double -> Printf.printf "%f" (Iterator.double i)
| c when c = el_string -> Printf.printf "%s" (Iterator.string i)
| c when c = el_symbol -> Printf.printf "SYMBOL: %s" (Iterator.string i)
| c when c = el_oid -> Printf.printf "%s" (Oid.to_string (Iterator.oid i))
| c when c = el_bool -> Printf.printf "%b" (Iterator.bool i)
| c when c = el_date -> Printf.printf "%Ld" (Iterator.date i)
| c when c = el_bindata -> Printf.printf "el_bindata"
| c when c = el_undefined -> Printf.printf "el_undefined"
| c when c = el_null -> Printf.printf "el_null"
| c when c = el_minkey -> Printf.printf "el_minkey"
| c when c = el_maxkey -> Printf.printf "el_maxkey"
| c when c = el_regex -> Printf.printf "el_regex: %s" (Iterator.regex i)
| c when c = el_code -> Printf.printf "el_code: %s" (Iterator.code i)
| c when c = el_codewscope ->
Printf.printf "el_code_w_scope: %s" (Iterator.code i);
let scope = Iterator.code_scope i in
Printf.printf "\n\t SCOPE: ";
print scope
| c when c = el_int -> Printf.printf "%ld" (Iterator.int i)
| c when c = el_long -> Printf.printf "%Ld" (Iterator.long i)
| c when c = el_timestamp ->
let (i,t) = Iterator.timestamp i in
Printf.printf "i: %ld, t: %ld" i t
| c when c = el_object || c = el_array ->
Printf.printf "\n";
print_raw i.Iterator.ibuf (Iterator.value i) (depth + 1)
| _ ->
Printf.eprintf "can't print type : %d\n%!" (Char.code t));
Printf.printf "\n";
aux ()
in
aux ()
let rec to_pretty b =
to_pretty_raw b.buf.Buf.str 0
and to_pretty_raw str i =
let i = { Iterator.ibuf = S.of_string str; pos = i+4; first = true; } in
let rec aux str =
ignore (Iterator.next i);
let t = Iterator.iterator_type i in
if t <> el_eoo
then
aux (str^(if str <> "" then ", " else "")^
(Iterator.key i)^" : "^
(match t with
| c when c = el_double -> Printf.sprintf "%f" (Iterator.double i)
| c when c = el_string -> Printf.sprintf "\"%s\"" (Iterator.string i)
| c when c = el_symbol -> Printf.sprintf "SYMBOL(%s)" (Iterator.string i)
| c when c = el_oid -> Printf.sprintf "ObjectId(\"%s\")" (Oid.to_string (Iterator.oid i))
| c when c = el_bool -> Printf.sprintf "%b" (Iterator.bool i)
| c when c = el_date -> Printf.sprintf "DATE(%Ld)" (Iterator.date i)
| c when c = el_bindata -> Printf.sprintf "BINARY"
| c when c = el_undefined -> Printf.sprintf "UNDEFINED"
| c when c = el_null -> Printf.sprintf "null"
| c when c = el_minkey -> Printf.sprintf "minkey"
| c when c = el_maxkey -> Printf.sprintf "maxkey"
| c when c = el_regex -> Printf.sprintf "REGEX(%s)" (Iterator.regex i)
| c when c = el_code -> Printf.sprintf "CODE(%s)" (Iterator.code i)
| c when c = el_codewscope ->
Printf.sprintf "CODE_W_SCOPE({code=\"%s\", scope=%s})" (Iterator.code i) (to_pretty (Iterator.code_scope i))
| c when c = el_int -> Printf.sprintf "%ld" (Iterator.int i)
| c when c = el_long -> Printf.sprintf "%Ld" (Iterator.long i)
| c when c = el_timestamp ->
let (i,t) = Iterator.timestamp i in
Printf.sprintf "{i: %ld, t: %ld}" i t
| c when c = el_object -> to_pretty_raw i.Iterator.ibuf (Iterator.value i)
| c when c = el_array -> "["^(to_pretty_raw i.Iterator.ibuf (Iterator.value i))^"]"
| _ -> Printf.sprintf "<unknown code>:%d" (Char.code t)))
else str
in
"{ "^aux ""^" }"
end (* module Print *)
(*
(* Test code *)
let hex s =
let len = S.length s in
let hs = S.create (len * 3) in
let pos = ref 0 in
for i = 0 to len - 1 do
let code = Char.code s.[i] in
let ss =
if code >= 32 && code < 127
then Printf.sprintf " %c " s.[i]
else Printf.sprintf "%02x " code
in
S.blit ss 0 hs !pos 3;
pos := !pos + 3
done;
S.sub hs 0 !pos;;
let dump ?(base=10) s =
let bb = Buffer.create 1024 in
let bh = Buffer.create 1024 in
let ba = Buffer.create 1024 in
let len = S.length s in
let m, n = len / base, len mod base in
for i = 0 to m do
let row = i * base in
for j = 0 to (if i = m then n-1 else base-1) do
let idx = i * base + j in
let code = Char.code s.[idx] in
Printf.bprintf bh "%02x " code;
Printf.bprintf ba "%c" (if code >= 32 && code < 127 then s.[idx] else '.');
if j = base-1 || (i = m && j = n-1)
then
(if base = 10
then Printf.bprintf bb "%04d %-30s %-10s\n" row (Buffer.contents bh) (Buffer.contents ba)
else Printf.bprintf bb "%04x %-48s %-10s\n" row (Buffer.contents bh) (Buffer.contents ba);
Buffer.clear bh; Buffer.clear ba)
done
done;
Buffer.contents bb;;
let b1 = Append.init ();;
let () = Append.new_oid b1 "_id";;
let () = Append.string b1 "name" "Joe";;
let () = Append.int b1 "age" (-1l);;
let () = Append.finish b1;;
let s1 = hex (Append.get b1);;
let () = print_string (dump (Append.get b1));;
let fi1, fc1 = Iterator.find b1 "name";;
let fv1 = Iterator.string fi1;;
let fv1l = Iterator.string_len fi1;;
let fi2, fc2 = Iterator.find b1 "age";;
let fv2 = Iterator.int fi2;;
let fv2d = Iterator.double fi2;;
let fv2b = Iterator.bool fi2;;
let good1 = (fc1,fv1,fv1l,fc2,fv2,fv2d,fv2b)
= ('\002', "Joe", 3, '\016', (-1l), -1.0, true);;
let i = Iterator.init b1;;
let c1 = Iterator.next i;;
let k1 = Iterator.key i;;
let v1 = Iterator.oid i;;
let c2 = Iterator.next i;;
let k2 = Iterator.key i;;
let v2 = Iterator.string i;;
let c3 = Iterator.next i;;
let k3 = Iterator.key i;;
let v3 = Iterator.int i;;
let good2 = (c1,k1,c2,k2,v2,c3,k3,v3)
= ('\007', "_id",
'\002', "name", "Joe",
'\016', "age", -1l);;
let b2 = Append.init ();;
let () = Append.string b2 "hello" "world";;
let () = Append.finish b2;;
let s2 = hex (Append.get b2);;
(* {"BSON": ["awesome", 5.05, 1986]} *)
let b3 = Append.init ();;
let () = Append.start_array b3 "BSON";;
let () = Append.string b3 "0" "awesome";;
let () = Append.double b3 "1" 5.05;;
let () = Append.int b3 "2" 1986;;
let () = Append.finish_array b3;;
let () = Append.finish b3;;
let s3 = hex (Append.get b3);;
let b4 = Append.init ~hint:1024 ();;
let () = Append.start_array b4 "Test";;
let () = Append.int b4 "int" 12345678;;
let () = Append.long b4 "long" 123456789012345;;
let () = Append.double b4 "double" 1234.5678;;
let () = Append.bool b4 "boolt" true;;
let () = Append.bool b4 "boolf" false;;
let () = Append.string b4 "string" "test";;
let () = Append.symbol b4 "symbol" "test";;
let () = Append.code b4 "code" "test";;
let scope = Append.init ();;
let () = Append.string scope "scope" "<--scope-->";;
let () = Append.finish scope;;
let () = Append.code_w_scope b4 "code" "test" scope;;
let () = Append.binary b4 "binary" st_bin_binary "test" 4;;
let () = Append.binary b4 "binary" st_bin_binary_old "test_old" 8;;
let () = Append.regex b4 "regex" "regex_pat" "regex_opts";;
let bson = Append.init ();;
let () = Append.string bson "bson" "bson_text";;
let () = Append.finish bson;;
let () = Append.bson b4 "bson" bson;;
let () = Append.timestamp b4 "timestamp" (1234l,123456789l);;
let () = Append.date b4 "date" 123456789;;
let () = Append.time_t b4 "time_t" (Time.seconds 1234);;
let () = Append.finish_array b4;;
let () = Append.finish b4;;
let s4 = hex (Append.get b4);;
let s4s = Append.size b4;;
let () = Print.print b4;;
let i4 = Iterator.init b4;;