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;; Wasm_of_ocaml runtime support
;; http://www.ocsigen.org/js_of_ocaml/
;;
;; This program 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, with linking exception;
;; either version 2.1 of the License, or (at your option) any later version.
;;
;; This program 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 program; if not, write to the Free Software
;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
(module
(import "fail" "caml_is_special_exception"
(func $caml_is_special_exception (param (ref eq)) (result i32)))
(import "ints" "caml_format_int"
(func $caml_format_int
(param (ref eq)) (param (ref eq)) (result (ref eq))))
(type $block (array (mut (ref eq))))
(type $bytes (array (mut i8)))
(type $buffer
(struct
(field (mut i32))
(field (ref $bytes))))
(func $add_char (param $buf (ref $buffer)) (param $c i32)
(local $pos i32)
(local $data (ref $bytes))
(local.set $pos (struct.get $buffer 0 (local.get $buf)))
(local.set $data (struct.get $buffer 1 (local.get $buf)))
(if (i32.lt_u (local.get $pos) (array.len (local.get $data)))
(then
(array.set $bytes (local.get $data) (local.get $pos) (local.get $c))
(struct.set $buffer 0 (local.get $buf)
(i32.add (local.get $pos) (i32.const 1))))))
(func $add_string (param $buf (ref $buffer)) (param $v (ref eq))
(local $pos i32) (local $len i32)
(local $data (ref $bytes))
(local $s (ref $bytes))
(local.set $pos (struct.get $buffer 0 (local.get $buf)))
(local.set $data (struct.get $buffer 1 (local.get $buf)))
(local.set $s (ref.cast (ref $bytes) (local.get $v)))
(local.set $len (array.len (local.get $s)))
(if (i32.gt_u (i32.add (local.get $pos) (local.get $len))
(array.len (local.get $data)))
(then
(local.set $len
(i32.sub (array.len (local.get $data)) (local.get $pos)))))
(array.copy $bytes $bytes
(local.get $data) (local.get $pos)
(local.get $s) (i32.const 0)
(local.get $len))
(struct.set $buffer 0 (local.get $buf)
(i32.add (local.get $pos) (local.get $len))))
(func (export "caml_format_exception") (param (ref eq)) (result (ref eq))
(local $exn (ref $block))
(local $buf (ref $buffer))
(local $v (ref eq))
(local $bucket (ref $block))
(local $i i32) (local $len i32)
(local $s (ref $bytes))
(local.set $exn (ref.cast (ref $block) (local.get 0)))
(if (result (ref eq))
(ref.eq (array.get $block (local.get $exn) (i32.const 0))
(ref.i31 (i32.const 0)))
(then
(local.set $buf
(struct.new $buffer
(i32.const 0)
(array.new $bytes (i32.const 0) (i32.const 256))))
(call $add_string
(local.get $buf)
(array.get $block
(ref.cast (ref $block)
(array.get $block (local.get $exn) (i32.const 1)))
(i32.const 1)))
(local.set $bucket
(block $continue (result (ref $block))
(block $default
(br_if $default
(i32.ne (array.len (local.get $exn)) (i32.const 3)))
(br_if $default
(i32.eqz
(call $caml_is_special_exception
(array.get $block (local.get $exn) (i32.const 1)))))
(local.set $v
(array.get $block (local.get $exn) (i32.const 2)))
(br_if $default
(i32.eqz (ref.test (ref $block) (local.get $v))))
(local.set $bucket (ref.cast (ref $block) (local.get $v)))
(br_if $default
(i32.eqz
(ref.eq
(array.get $block (local.get $bucket) (i32.const 0))
(ref.i31 (i32.const 0)))))
(local.set $i (i32.const 1))
(br $continue (local.get $bucket)))
(local.set $i (i32.const 2))
(local.get $exn)))
(local.set $len (array.len (local.get $bucket)))
(if (i32.lt_u (local.get $i) (local.get $len))
(then
(call $add_char (local.get $buf) (@char "("))
(loop $loop
(local.set $v
(array.get $block (local.get $bucket) (local.get $i)))
(if (ref.test (ref i31) (local.get $v))
(then
(call $add_string (local.get $buf)
(call $caml_format_int
(@string "%d")
(ref.cast (ref i31) (local.get $v)))))
(else (if (ref.test (ref $bytes) (local.get $v))
(then
(call $add_char (local.get $buf) (@char "\""))
(call $add_string (local.get $buf) (local.get $v))
(call $add_char (local.get $buf) (@char "\"")))
(else
(call $add_char (local.get $buf) (@char "_"))))))
(local.set $i (i32.add (local.get $i) (i32.const 1)))
(if (i32.lt_u (local.get $i) (local.get $len))
(then
(call $add_char (local.get $buf) (@char ","))
(call $add_char (local.get $buf) (@char " "))
(br $loop))))
(call $add_char (local.get $buf) (@char ")"))))
(local.set $s
(array.new $bytes (i32.const 0)
(struct.get $buffer 0 (local.get $buf))))
(array.copy $bytes $bytes
(local.get $s) (i32.const 0)
(struct.get $buffer 1 (local.get $buf)) (i32.const 0)
(struct.get $buffer 0 (local.get $buf)))
(local.get $s))
(else
(array.get $block (local.get $exn) (i32.const 1)))))
)
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