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browserl.js
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browserl.js
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'use strict';
// An erlang emulator written in javascript
// Copyright (C) 2012, Fredrik Svahn
//
// Dual licensed under the MIT and GPLv3 licenses
//
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
// For the license terms under the MIT license, see MIT-LICENSE
//TODO list:
//-----------
//binaries, really a hack at the moment
//ets tables, just a hack to get things working
//file ops, just a hack
//checking args for bifs
//TODO distribution
//hard coded paths in tester.erl
//net_kernel in browser not aware of connection
//global in browser not updated about nodedown from other browsers
//known BUGs
//-----------
//initial calls sometimes have proc_lib as initial call in i().
//lists:reverse(a) ==problem with binary matching in lib@3479
/*
dbg:start(), dbg:tracer(), dbg:tpl(, '_', []).
dbg:p(all, c).
dbg:stop_clear().
dbg:tpl(math, sum, dbg:fun2ms(fun(_) -> return_trace() end)).
*/
var OpcodeNames = ['NOP','label/1','func_info/3','int_code_end/0','call/2','call_last/3','call_only/2','call_ext/2','call_ext_last/3','bif0/2','bif1/4',
'bif2/5','allocate/2','allocate_heap/3','allocate_zero/2','allocate_heap_zero/3','test_heap/2','init/1','deallocate/1','return/0','send/0',
'remove_message/0','timeout/0','loop_rec/2','loop_rec_end/1','wait/1','wait_timeout/2','m_plus/4','m_minus/4','m_times/4','m_div/4','int_div/4',
'int_rem/4','int_band/4','int_bor/4','int_bxor/4','int_bsl/4','int_bsr/4','int_bnot/3','is_lt/3','is_ge/3','is_eq/3','is_ne/3','is_eq_exact/3',
'is_ne_exact/3','is_integer/2','is_float/2','is_number/2','is_atom/2','is_pid/2','is_reference/2','is_port/2','is_nil/2','is_binary/2','is_constant/2',
'is_list/2','is_nonempty_list/2','is_tuple/2','test_arity/3','select_val/3','select_tuple_arity/3','jump/1','catch/2','catch_end/1','move/2','get_list/3',
'get_tuple_element/3','set_tuple_element/3','put_string/3','put_list/3','put_tuple/2','put/1','badmatch/1','if_end/0','case_end/1',
'call_fun/1','make_fun/3','is_function/2','call_ext_only/2','bs_start_match/2','bs_get_integer/5','bs_get_float/5','bs_get_binary/5',
'bs_skip_bits/4','bs_test_tail/2','bs_save/1','bs_restore/1','bs_init/2','bs_final/2','bs_put_integer/5','bs_put_binary/5','bs_put_float/5',
'bs_put_string/2','bs_need_buf/1','fclearerror/0','fcheckerror/1','fmove/2','fconv/2','fadd/4','fsub/4','fmul/4','fdiv/4','fnegate/3','make_fun2/1',
'try/2','try_end/1','try_case/1','try_case_end/1','raise/2','bs_init2/6','bs_bits_to_bytes/3','bs_add/5','apply/1','apply_last/2','is_boolean/2',
'is_function2/3','bs_start_match2/5','bs_get_integer2/7','bs_get_float2/7','bs_get_binary2/7','bs_skip_bits2/5','bs_test_tail2/3','bs_save2/2',
'bs_restore2/2','gc_bif1/5','gc_bif2/6','bs_final2/2','bs_bits_to_bytes2/2','put_literal/2','is_bitstr/2','bs_context_to_binary/1','bs_test_unit/3',
'bs_match_string/4','bs_init_writable/0','bs_append/8','bs_private_append/6','trim/2','bs_init_bits/6','bs_get_utf8/5','bs_skip_utf8/4','bs_get_utf16/5',
'bs_skip_utf16/4','bs_get_utf32/5','bs_skip_utf32/4','bs_utf8_size/3','bs_put_utf8/3','bs_utf16_size/3','bs_put_utf16/3','bs_put_utf32/3',
'on_load/0','recv_mark/1','recv_set/1','gc_bif3/7'];
var ArityTable = [0,1,3,0,2,3,2,2,3,2,4,5,2,3,2,3,2,1,1,0,0,0,0,2,1,1,2,4,4,4,4,4,4,4,4,4,4,4,3,3,3,3,3,3,3,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,1,2,1,2,3,3,3,3,3,2,1,1,0,1,1,3,2,2,2,5,5,5,4,2,1,1,2,2,5,5,5,2,1,0,1,2,2,4,4,4,4,3,1,2,1,1,1,2,6,3,5,1,2,2,3,5,7,7,7,5,3,2,2,5,6,2,2,2,2,1,3,4,0,8,6,2,6,5,4,5,4,5,4,3,3,3,3,3,0,1,1,7];
var Modules = [];
//
// START OF LOADER CODE
//
//The atom table used during initial code load
var h_atom = (2 << 27) + 1;
var loaderAtomTable = {};
function loaderStrToAtom(str){
var atom = loaderAtomTable[str];
if (atom != undefined) return atom;
loaderAtomTable[str] = h_atom;
return h_atom++;
}
//atom constants
var am_true = loaderStrToAtom('true');
var am_false = loaderStrToAtom('false');
var am_erlang = loaderStrToAtom('erlang');
var am_self = loaderStrToAtom('self');
var am_node = loaderStrToAtom('node');
var am_ok = loaderStrToAtom('ok');
var am_round = loaderStrToAtom('round');
var am_float = loaderStrToAtom('float');
var am_size = loaderStrToAtom('size');
var am_byte_size = loaderStrToAtom('byte_size');
var am_bit_size = loaderStrToAtom('bit_size');
var am_length = loaderStrToAtom('length');
var am_abs = loaderStrToAtom('abs');
var am_trunc = loaderStrToAtom('trunc');
var am_is_port = loaderStrToAtom('is_port');
var am_is_number = loaderStrToAtom('is_number');
var am_is_integer = loaderStrToAtom('is_integer');
var am_is_list = loaderStrToAtom('is_list');
var am_is_tuple = loaderStrToAtom('is_tuple');
var am_is_atom = loaderStrToAtom('is_atom');
var am_is_pid = loaderStrToAtom('is_pid');
var am_is_binary = loaderStrToAtom('is_binary');
var am_is_boolean = loaderStrToAtom('is_boolean');
var am_tuple_size = loaderStrToAtom('tuple_size');
var am_not = loaderStrToAtom('not');
var am_hd = loaderStrToAtom('hd');
var am_tl = loaderStrToAtom('tl');
var am_get = loaderStrToAtom('get');
var am_element = loaderStrToAtom('element');
var am_and = loaderStrToAtom('and');
var am_or = loaderStrToAtom('or');
var am_apply = loaderStrToAtom('apply');
var am_yield = loaderStrToAtom('yield');
var am_os = loaderStrToAtom('os');
var am_band = loaderStrToAtom('band');
var am_bsr = loaderStrToAtom('bsr');
var am_bsl = loaderStrToAtom('bsl');
var am_bor = loaderStrToAtom('bor');
var am_bxor = loaderStrToAtom('bxor');
var am_timestamp = loaderStrToAtom('timestamp');
var am_getenv = loaderStrToAtom('getenv');
var am_putenv = loaderStrToAtom('putenv');
var am_ets = loaderStrToAtom('ets');
var am_lists = loaderStrToAtom('lists');
var am_unicode = loaderStrToAtom('unicode');
var am_error_logger = loaderStrToAtom('error_logger');
var am_prim_file = loaderStrToAtom('prim_file');
var am_net_kernel = loaderStrToAtom('net_kernel');
var am_setnode = loaderStrToAtom('setnode');
var am_code = loaderStrToAtom('code');
var am_file = loaderStrToAtom('file');
var am_math = loaderStrToAtom('math');
var am_badarg = loaderStrToAtom('badarg');
var am_badarity = loaderStrToAtom('badarity');
var am_delete_object = loaderStrToAtom('delete_object');
var am_new = loaderStrToAtom('new');
var am_delete = loaderStrToAtom('delete');
var am_delete = loaderStrToAtom('delete');
var am_select_delete = loaderStrToAtom('select_delete');
var am_select = loaderStrToAtom('select');
var am_insert = loaderStrToAtom('insert');
var am_lookup = loaderStrToAtom('lookup');
var am_lookup_element = loaderStrToAtom('lookup_element');
var am_slot = loaderStrToAtom('slot');
var am_first = loaderStrToAtom('first');
var am_next = loaderStrToAtom('next');
var am_all = loaderStrToAtom('all');
var am_info = loaderStrToAtom('info');
var am_match = loaderStrToAtom('match');
var am_match_object = loaderStrToAtom('match_object');
var am_member = loaderStrToAtom('member');
var am_keysearch = loaderStrToAtom('keysearch');
var am_keyfind = loaderStrToAtom('keyfind');
var am_keymember = loaderStrToAtom('keymember');
var am_reverse = loaderStrToAtom('reverse');
var am_bin_is_7bit = loaderStrToAtom('bin_is_7bit');
var am_characters_to_binary = loaderStrToAtom('characters_to_binary');
var am_characters_to_list = loaderStrToAtom('characters_to_list');
var am_warning_map = loaderStrToAtom('warning_map');
var am_dflag_unicode_io = loaderStrToAtom('dflag_unicode_io');
var am_internal_native2name = loaderStrToAtom('internal_native2name');
var am_internal_name2native = loaderStrToAtom('internal_name2native');
var am_get_chunk = loaderStrToAtom('get_chunk');
var am_native_name_encoding = loaderStrToAtom('native_name_encoding');
var am_log10 = loaderStrToAtom('log10');
var am_log = loaderStrToAtom('log');
var am_now = loaderStrToAtom('now');
var am_date = loaderStrToAtom('date');
var am_universaltime_to_localtime = loaderStrToAtom('universaltime_to_localtime');
var am_localtime = loaderStrToAtom('localtime');
var am_time = loaderStrToAtom('time');
var am_universaltime_to_localtime = loaderStrToAtom('universaltime_to_localtime');
var am_statistics = loaderStrToAtom('statistics');
var am_div = loaderStrToAtom('div');
var am_rem = loaderStrToAtom('rem');
var am_group_leader = loaderStrToAtom('group_leader');
var am_group_leader = loaderStrToAtom('group_leader');
var am_garbage_collect = loaderStrToAtom('garbage_collect');
var am_cancel_timer = loaderStrToAtom('cancel_timer');
var am_memory = loaderStrToAtom('memory');
var am_registered = loaderStrToAtom('registered');
var am_processes = loaderStrToAtom('processes');
var am_list_to_pid = loaderStrToAtom('list_to_pid');
var am_pid_to_list = loaderStrToAtom('pid_to_list');
var am_port_to_list = loaderStrToAtom('port_to_list');
var am_fun_to_list = loaderStrToAtom('fun_to_list');
var am_fun_info = loaderStrToAtom('fun_info');
var am_register = loaderStrToAtom('register');
var am_unregister = loaderStrToAtom('unregister');
var am_list_to_float = loaderStrToAtom('list_to_float');
var am_float_to_list = loaderStrToAtom('float_to_list');
var am_make_tuple = loaderStrToAtom('make_tuple');
var am_whereis = loaderStrToAtom('whereis');
var am_self = loaderStrToAtom('self');
var am_process_info = loaderStrToAtom('process_info');
var am_process_display = loaderStrToAtom('process_display');
var am_is_alive = loaderStrToAtom('is_alive');
var am_process_flag = loaderStrToAtom('process_flag');
var am_get_module_info = loaderStrToAtom('get_module_info');
var am_get_module_info = loaderStrToAtom('get_module_info');
var am_system_info = loaderStrToAtom('system_info');
var am_pre_loaded = loaderStrToAtom('pre_loaded');
var am_module_loaded = loaderStrToAtom('module_loaded');
var am_load_module = loaderStrToAtom('load_module');
var am_function_exported = loaderStrToAtom('function_exported');
var am_make_ref = loaderStrToAtom('make_ref');
var am_iolist_size = loaderStrToAtom('iolist_size');
var am_list_to_integer = loaderStrToAtom('list_to_integer');
var am_integer_to_list = loaderStrToAtom('integer_to_list');
var am_iolist_to_binary = loaderStrToAtom('iolist_to_binary');
var am_nodes = loaderStrToAtom('nodes');
var am_open_port = loaderStrToAtom('open_port');
var am_port_command = loaderStrToAtom('port_command');
var am_port_control = loaderStrToAtom('port_control');
var am_port_connect = loaderStrToAtom('port_connect');
var am_port_close = loaderStrToAtom('port_close');
var am_monitor = loaderStrToAtom('monitor');
var am_demonitor = loaderStrToAtom('demonitor');
var am_is_process_alive = loaderStrToAtom('is_process_alive');
var am_link = loaderStrToAtom('link');
var am_unlink = loaderStrToAtom('unlink');
var am_display = loaderStrToAtom('display');
var am_bump_reductions = loaderStrToAtom('bump_reductions');
var am_get_stacktrace = loaderStrToAtom('get_stacktrace');
var am_exit = loaderStrToAtom('exit');
var am_error = loaderStrToAtom('error');
var am_throw = loaderStrToAtom('throw');
var am_raise = loaderStrToAtom('raise');
var am_atom_to_list = loaderStrToAtom('atom_to_list');
var am_term_to_binary = loaderStrToAtom('term_to_binary');
var am_binary_to_term = loaderStrToAtom('binary_to_term');
var am_setelement = loaderStrToAtom('setelement');
var am_list_to_tuple = loaderStrToAtom('list_to_tuple');
var am_tuple_to_list = loaderStrToAtom('tuple_to_list');
var am_list_to_binary = loaderStrToAtom('list_to_binary');
var am_ref_to_list = loaderStrToAtom('ref_to_list');
var am_send = loaderStrToAtom('send');
var am_send_after = loaderStrToAtom('send_after');
var am_list_to_atom = loaderStrToAtom('list_to_atom');
var am_binary_to_list = loaderStrToAtom('binary_to_list');
var am_phash = loaderStrToAtom('phash');
var am_put = loaderStrToAtom('put');
var am_get = loaderStrToAtom('get');
var am_get = loaderStrToAtom('get');
var am_erase = loaderStrToAtom('erase');
var am_make_fun = loaderStrToAtom('make_fun');
var am_spawn_opt = loaderStrToAtom('spawn_opt');
var am_spawn = loaderStrToAtom('spawn');
var am_spawn_link = loaderStrToAtom('spawn_link');
var am_nonode_nohost = loaderStrToAtom('nonode@nohost');
var am_pid = loaderStrToAtom('pid');
var am_eval = loaderStrToAtom('eval');
var am_get = loaderStrToAtom('get');
var am_set = loaderStrToAtom('set');
var am_call = loaderStrToAtom('call');
var am_js = loaderStrToAtom('js');
var am_browserl_dist = loaderStrToAtom('browserl_dist');
var am_listen = loaderStrToAtom('listen');
var am_accept = loaderStrToAtom('accept');
var am_childspecs = loaderStrToAtom('childspecs');
var am_re = loaderStrToAtom('re');
var am_run = loaderStrToAtom('run');
//special characters
var am_sign_minus = loaderStrToAtom('-');
var am_sign_equal_exact = loaderStrToAtom('=:=');
var am_sign_not_equal_exact = loaderStrToAtom('=/=');
var am_sign_equal = loaderStrToAtom('==');
var am_sign_gt = loaderStrToAtom('>');
var am_sign_lt = loaderStrToAtom('<');
var am_sign_gte = loaderStrToAtom('>=');
var am_sign_lte = loaderStrToAtom('=<');
var am_sign_not_equal = loaderStrToAtom('/=');
var am_sign_assign = loaderStrToAtom('=');
var am_sign_plus = loaderStrToAtom('+');
var am_sign_minus = loaderStrToAtom('-');
var am_sign_multiply = loaderStrToAtom('*');
var am_sign_divide = loaderStrToAtom('/');
var am_sign_exclamation = loaderStrToAtom('!');
var am_sign_plusplus = loaderStrToAtom('++');
var am_sign_minusminus = loaderStrToAtom('--');
//Thanks IE
if (!Date.now) {
Date.now = function() {
return +new Date;
}
}
//Common interface for extracting data from an Uint8Array, array or a string
if (window.Uint8Array) {
Uint8Array.prototype.getString = function(pos, len) {
var s = '', i;
for (i = 0; i < len; i++) {
s += String.fromCharCode(this[pos+i]);
}
return s;
}
Uint8Array.prototype.getZeroTerminatedString = function(pos, maxlen) {
var s = '', c, i = 0;
while (i < maxlen) {
c = this[pos+(i++)];
if (c == 0) break;
s += String.fromCharCode(c);
}
return s;
}
Uint8Array.prototype.getByte = function(pos) {
return this[pos];
}
Uint8Array.prototype.getInt32 = function(pos) {
return (this[pos]<<24) + (this[pos+1]<<16) + (this[pos+2]<<8) + this[pos+3];
}
}
Array.prototype.getString = function(pos, len) {
var s = '', i;
for (i = 0; i < len; i++) {
s += String.fromCharCode(this[pos+i]);
}
return s;
}
Array.prototype.getZeroTerminatedString = function(pos, maxlen) {
var s = '', c, i = 0;
while (i < maxlen) {
c = this[pos+(i++)];
if (c == 0) break;
s += String.fromCharCode(c);
}
return s;
}
Array.prototype.getByte = function(pos) {
return this[pos];
}
Array.prototype.getInt32 = function(pos) {
return (this[pos]<<24) + (this[pos+1]<<16) + (this[pos+2]<<8) + this[pos+3];
}
Array.prototype.subarray =function(start, end) {
//slice does not seem to work for konqueror
var i, sa = new Array(end-start);
for (i = start; i < end; i++) sa[i-start] = this[i];
return sa;
}
String.prototype.getZeroTerminatedString = function(pos, maxlen) {
var s = '', c, i = 0;
while (i < maxlen) {
c = this.charCodeAt(pos+(i++));
if (c == 0) break;
s += String.fromCharCode(c);
}
return s;
}
String.prototype.getByte = function(pos) {
return this.charCodeAt(pos)&255;
}
String.prototype.getInt32 = function(pos) {
return (this.getByte(pos)<<24) + (this.getByte(pos+1)<<16) +
(this.getByte(pos+2)<<8) + this.getByte(pos+3);
}
String.prototype.getString = function(pos, len) {
var s = '', i;
for (i = 0; i < len; i++) {
s += String.fromCharCode(this.getByte(pos+i));
}
return s;
}
String.prototype.subarray = function(start, end) {
var s = [], i;
for (i = start; i < end; i++) {
s.push(this.getByte(i));
}
return s;
}
//Not using Float64Array since typed arrays are not available on all targets
function arrayToFloat(a, pos) {
var sign = a.getInt32(pos) >> 31;
var exponent = ((a.getInt32(pos) >> 20) & ((1 << 11)-1));
var fractionUpper = a.getInt32(pos) & ((1 << 20)-1);
var fractionLower = a.getInt32(pos+4);
var fraction = fractionUpper*0x100000000 + Math.abs(fractionLower);
var num;
if (exponent == 0)
num = Math.pow(2, exponent-1023)*(Math.abs(fraction/(4503599627370496/2))); //1 bsl 51
else
num = Math.pow(2, exponent-1023)*(1+Math.abs(fraction/4503599627370496)); //1 bsl 52
if (sign == -1) num = -num;
// debugln1('arrayToFloat:'+sign+':'+exponent+':'+fraction+':'+num);
return num;
}
function floatToArray(n, bits) { //TODO: handle 32 bits
var s = (n < 0) ? 1 : 0;
var e = 0, m = 0;
n = Math.abs(n);
if (n != 0) {
while (n >= 2) {
e++;
n /= 2;
}
while (n < 1) {
e--;
n *= 2;
}
} else { e = -1023; n = 1;} //TODO handle denormalised numbers
// console.log("exponent: "+(e+1023)+" mantissa: "+(n-1)*0x10000000000000); //1 bsl 52
var lower32bits = (n-1)*4503599627370496 & 0xffffffff; //shift mantissa 52 bits and mask out lowest 32
var higher32bits = ((n-1)*Math.pow(2,20)) & 0xfffff | (Math.abs(e+1023) << 20) | (s << 31);
return [higher32bits >>> 24, (higher32bits >>> 16) & 0xff, (higher32bits >>> 8) & 0xff, higher32bits & 0xff,
lower32bits >>> 24, (lower32bits >>> 16) & 0xff, (lower32bits >>> 8) & 0xff, lower32bits & 0xff];
}
function arrayToTerm(a, loading){
var pos=1;
if (a[0] != 131) throw 'not a valid term '+a.charCodeAt(0);
return decode(a, 1);
function decode() {
switch(a[pos++]) {
case 70: //float constant?
var num = arrayToFloat(a, pos);
pos += 8;
return {type:am_float, value:num};
case 77: //bitstring (used in erl_eval_SUITE, and many more)
var byte_len = bytesToInteger(a, pos, 4);
var bits_in_last_byte = bytesToInteger(a, pos+4, 1);
pos += 4+byte_len+1;
return {type:'bitstring', value: a.getString(pos-byte_len, byte_len+1),
len:byte_len*8+bits_in_last_byte};
case 97: //small int
return bytesToInteger(a, pos++, 1);
case 98: //int
pos+=4;
return bytesToInteger(a, pos-4, 4);
case 100: //atom
var len = bytesToInteger(a, pos, 2);
pos += len + 2;
var atom = a.getString(pos - len, len);
if (loading) return loaderStrToAtom(atom);
return strToAtom(atom);
case 103: //pid_ext
var node = decode();
var id = bytesToInteger(a, pos, 4);
pos += 4;
var serial = bytesToInteger(a, pos, 4);
pos += 4;
var creation = bytesToInteger(a, pos, 1);
pos += 1;
if (node == node_name) return {type: am_pid, value: id}
return {type:am_pid, value:[node, id, serial, creation]};
case 104: //small tuple
var len = bytesToInteger(a, pos, 1);
var tp = [];
pos += 1;
while (len--) { tp.push(decode()); }
return tp;
case 106: //nil
return 2 << 27;
case 107: //string
var len = bytesToInteger(a, pos, 2);
pos += len + 2;
return strToList(a.getString(pos - len, len));
case 108: //list
var len = bytesToInteger(a, pos, 4);
var next = 2 << 27;
pos += 4;
while (len--) {
var el = decode();
next = {value: el, next:next};
}
if (a[pos] != 106) {
return listReverse(next, decode());
}
pos++;
return listReverse(next, 2 << 27);
case 109:
var len = bytesToInteger(a, pos, 4);
pos += 4 + len;
return a.getString(pos - len, len);
case 110: //small big
var len = bytesToInteger(a, pos, 1);
var sign = bytesToInteger(a, pos+1, 1);
var bytes = a.subarray(pos+2, pos+2+len);
pos += len+2;
var big = new Math.BigInt("0"), t = Math.BigInt.valueOf(256);
for (var i = 0; i<len; i++) {
big = big.add(t.pow(i).multiply(Math.BigInt.valueOf(bytes[i])));
}
if (sign==1) return big.negate();
return big;
// case 112: //fun e.g. fun()-> ok end
// case 113: //fun e.g. fun io:format/2
case 114: //external reference
var len = bytesToInteger(a, pos, 2)*4;
pos += 2;
var node = decode();
var creation = bytesToInteger(a, pos, 1);
pos += 1;
if (node == node_name) {
var id = 0;
while (len>0) {
id = bytesToInteger(a, pos, 4) + id*0xFFFFFFFF;
len -= 4;
pos += 4;
}
return {type: "ref", value: id};
}
var id = a.getString(pos, len);
pos += len;
return {type:"ref", value:[len/4, node, creation, id]};
default:
throw 'unknown type '+a[pos-1]+'at'+(pos-1)+' in arrayToTerm';
}
}
function bytesToInteger(a, pos, len) { //TODO handle bignums
var isNegative, i, n, result = 0;
isNegative = (a[pos] > 128) && (len > 3);
for (i = pos; i < pos+len; i++) {
n = a[i];
if (isNegative) {
n = 255 - n;
}
result = result * 256 + n;
}
return isNegative ? -result - 1: result;
}
}
function termToBinary(term){
return termToStrInternal(term, String.fromCharCode(131));
function termToStrInternal(a, res){
if (is_atom(a)) {
var str = atomToStr(a);
res += String.fromCharCode(100);
res += intToStr(str.length, 2);
res += str;
} else if (is_tuple(a)) { //TODO handle tuples larger than 255
var temp="";
res += String.fromCharCode(104);
res += intToStr(a.length, 1);
for(var i = 0; i < a.length; i++) temp += termToStrInternal(a[i], "");
res += temp;
} else if (is_nonempty_list(a)) {
var len = listLen(a);
if (len == undefined) len = listLenImproperList(a);
res += String.fromCharCode(108);
res += intToStr(len, 4);
while (a != 2 << 27) {
res += termToStrInternal(a.value, "");
a = a.next;
if (a.value == undefined) {
//improper list
res += termToStrInternal(a, "");
return res;
}
}
res += String.fromCharCode(106);
} else if (is_list(a)) {
res += String.fromCharCode(106);
} else if (is_integer(a)) { //TODO handle large integers
if (a >= 0 && a < 256) {
res += String.fromCharCode(97);
res += intToStr(a, 1);
} else if (a > 255 && a < 0xFFFFFFFF) {
res += String.fromCharCode(98);
res += intToStr(a, 4);
} else if (is_bignum(a)) { //HACK
debugln1("WARNING: encoding bignum not implemented");
} else if (a < 0) { //HACK
debugln1("WARNING: encoding negative numbers not implemented");
} else throw "unknown int in term_to_binary";
} else if (is_pid(a)) {
res += String.fromCharCode(103);
if (is_external_pid(a)) {
res += termToStrInternal(a.value[0], ""); //node
res += intToStr(a.value[1], 4); //process id
res += intToStr(a.value[2], 4); //serial
res += intToStr(a.value[3], 1); //creation
} else {
res += termToStrInternal(node_name, "")
res += intToStr(a.value, 4);
res += intToStr(0, 4);
res += intToStr(3, 1);
}
} else if (is_reference(a)) {
res += String.fromCharCode(114);
if (is_external_reference(a)) {
res += intToStr(a.value[0], 2);
res += termToStrInternal(a.value[1], "");
res += intToStr(a.value[2], 1);
res += a.value[3];
} else {
res += intToStr(3, 2); //len
res += termToStrInternal(node_name, ""); //node
res += intToStr(0, 1); //creation
res += intToStr(0, 4); //id BUG unable to handle really large ids
res += intToStr(div(a.value, 0xFFFFFFFF), 4); //id
res += intToStr(a.value % 0xFFFFFFFF, 4); //id
}
} else if (is_fun(a)) { //HACK
debugln1("WARNING: encoding fun not implemented");
} else if (is_binary(a)) { //HACK
debugln1("WARNING: encoding binary not implemented");
} else if (is_bitstring(a)) { //HACK
debugln1("WARNING: encoding bitstring not implemented");
} else if (is_float(a)) { //HACK
debugln1("WARNING: encoding float not implemented");
} else if (is_binary_matchspec(a)) {
debugln1("WARNING: encoding matchspec_binary not implemented");
} else throw "unknown type in term_to_binary";
return res;
}
function intToStr(i, size) {
var isNegative = i < 0, rem, res = "";
if (isNegative) i = -i - 1;
while (i > 0) {
rem = i % 256;
if (isNegative) rem = 255 - rem;
res = String.fromCharCode(rem) + res;
i = Math.floor(i / 256);
}
while (res.length < size) res = String.fromCharCode(0) + res;
return res;
}
}
var bootFile;
function loadFiles(files, mod, fun, args) {
var Code1, Code2 = [];
var localAtomToGlobal = [];
var labelsToIp = [0];
var Imports = [];
var Funs = [];
var Exports = {};
var Literals = [];
var Strings = '';
var currentModuleName = '';
var hasTypedArray = ('ArrayBuffer' in window && 'Uint8Array' in window);
var loaded = 0;
for (var i = 0; i < files.length; i++) fetch(files[i]);
function fetch(file) {
var arr, buffer, xhr = new XMLHttpRequest();
xhr.open('GET', 'beams/'+file, true);
if (hasTypedArray && 'mozResponseType' in xhr) {
xhr.mozResponseType = 'arraybuffer';
} else if (hasTypedArray && 'responseType' in xhr) {
xhr.responseType = 'arraybuffer';
} else {
if (xhr.overrideMimeType)
xhr.overrideMimeType('text/plain; charset=x-user-defined');
hasTypedArray=false;
}
xhr.onreadystatechange = function() {
var result;
if (xhr.readyState != 4) { return; }
if (xhr.status != 200 && xhr.status != 0) {
debugln1('Error while loading ');
}
if (!hasTypedArray) {
if (xhr.responseBody != undefined) {
result = vbarrayToArr(xhr.responseBody);
} else result = xhr.responseText;
} else {
if ('mozResponse' in xhr) {
buffer = xhr.mozResponse;
} else if (xhr.mozResponseArrayBuffer) {
buffer = xhr.mozResponseArrayBuffer;
} else if ('responseType' in xhr) {
buffer = xhr.response;
}
result = new Uint8Array(buffer, 0, buffer.byteLength);
}
if (file == 'start.boot') bootFile = result;
else if (file=='beamfiles.tar') untar(result);
else checkBeam(result, 0, result.length);
if (++loaded == files.length) {
for (var i in loaderAtomTable) AtomTable[loaderAtomTable[i]-(2<<27)] = i;
erlangSpawn(-1, strToAtom(mod), strToAtom(fun), args, false);
erl_exec();
}
}
xhr.send(null);
}
function vbarrayToArr(a) {
return vbarrayFirst(a).replace(/[\s\S]/g, function(str) {
var c = str.charCodeAt(0);
return String.fromCharCode(c&0xff, c>>8);
}) + vbarrayLast(a);
}
function untar(a) {
var tarPos = 0, tarLen = a.length;
while (tarPos <= tarLen) {
labelsToIp = [0];
Exports = {};
localAtomToGlobal = [0];
Literals = [];
Code2 = [];
Imports = [];
Funs = [];
var fileName = a.getZeroTerminatedString(tarPos, 100);
if (fileName.length >= 100) throw 'No support for UStar extended filenames';
if (fileName.length == 0) break;
var i, lenStr = '0';
for (i=0; i < 12; i++)
lenStr += String.fromCharCode(a.getByte(tarPos+124+i));
var fileLen = parseInt(lenStr, 8);
// var start = Date.now();
if (fileName.match(/\.beam$/)) checkBeam(a, tarPos+512, fileLen);
// if (fileName.match(/io_SUITE\.beam$/)) checkBeam(a, tarPos+512, fileLen);
tarPos += 512 + 512 * Math.ceil(fileLen / 512);
// var elapsed = Date.now()-start;
// debugln1('loaded file'+fileName+': ');
}
}
function checkBeam(a, p, len) {
if (a.getString(p, 4) == 'FOR1' && a.getString(p+8, 4) == 'BEAM') {
scanBeam(a, p+12, len-12);
transformBeam();
} else {
throw 'Not a beam file';
}
}
function scanBeam(a, pos, len) {
var i;
if (len > 8) {
var chunk = a.getString(pos, 4);
var csize = a.getInt32(pos+4);
var newpos = pos + (4 * Math.floor((csize+3) / 4)) + 8;
len = len - (4 * Math.floor((csize+3) / 4) + 8);
pos += 8;
// var start = Date.now();
switch (chunk) {
case 'Atom': //Atoms
localAtomToGlobal = [0];
var noOfAtoms = a.getInt32(pos);
var atomPos = pos + 4;
for (i = 0; i < noOfAtoms; i++) {
var alen = a.getByte(atomPos);
var atomStr = a.getString(atomPos+1, alen);
if (i == 0) {
currentModuleName = atomStr;
// debugln1('loading '+currentModuleName);
}
atomPos += alen + 1;
var globalAtom = loaderStrToAtom(atomStr) << 5 >> 5;
localAtomToGlobal[i+1] = globalAtom;
}
break;
case 'LitT': //Literals
var packed = a.subarray(pos+4, pos+csize);
var deflated = new FlateStream(packed).getBytes();
var numLit = deflated.getInt32(0);
var litPos = 4;
for (i = 0; i < numLit; i++) {
var len = deflated.getInt32(litPos);
var sa = deflated.subarray(litPos+4, litPos+4+len);
Literals[i]= arrayToTerm(sa, true);
litPos += len + 4;
}
break;
case 'Code':
var subSize = a.getInt32(pos);
var instructionSetVersion = a.getInt32(pos+4);
var operandMax = a.getInt32(pos+8);
var noOfLabels = a.getInt32(pos+12);
var noOfFunctions = a.getInt32(pos+16);
decodeInstructions(a, pos+20, csize-20);
break;
case 'StrT': //Strings
Strings = '';
while(csize--) {
Strings = Strings+String.fromCharCode(a.getByte(pos++));
}
break;
case 'FunT': //Lambdas
var noOfEntries = a.getInt32(pos);
for (i = 0; i < noOfEntries; i++) {
var fun = a.getInt32(pos+i*24+4);
var arity = a.getInt32(pos+i*24+8);
var label = a.getInt32(pos+i*24+12);
var index = a.getInt32(pos+i*24+16);
var numFree = a.getInt32(pos+i*24+20);
var oldUniq = a.getInt32(pos+i*24+24);
Funs[i] = [label, numFree, arity];
}
break;
case 'ImpT': //Imports
var noOfEntries = a.getInt32(pos);
for (i = 0; i < noOfEntries; i++) {
var module = a.getInt32(pos+i*12+4);
var fun = a.getInt32(pos+i*12+8);
var arity = a.getInt32(pos+i*12+12);
Imports.push([module, fun, arity]); //localAtoms for mod and fun
}
break;
case 'ExpT': //Exports
var noOfEntries = a.getInt32(pos);
for (i = 0; i < noOfEntries; i++) {
var fun = a.getInt32(pos+i*12+4);
var arity = a.getInt32(pos+i*12+8);
var label = a.getInt32(pos+i*12+12);
if (Exports[fun] == undefined) Exports[fun] = []; //localAtom for fun
Exports[fun][arity] = label;
}
break;
case 'LocT': //Ignored by loader
break;
case 'Attr':
// debugln1(arrayToTerm(getString(a, pos, csize)));
break;
case 'CInf':
// debugln1(arrayToTerm(getString(a, pos, csize)));
break;
case 'Abst':
break;
default:
throw 'Unknown chunk: '+chunk;
}
// var elapsed = Date.now()-start;
// debugln1('chunk:'+ chunk +' '+elapsed);
scanBeam(a, newpos, len);
}
}
//Pass 1, parse the code segment
function decodeInstructions(a, pos, size) {
var origPos = pos;
var codeEnd = pos + size;
var ip = 0;
var i, j;
var op;
try { Code1 = new Uint32Array(size) } catch (e) { Code1 = new Array(size); }
while (pos < codeEnd) {
op = a.getByte(pos++);
if (op == 1) {
var label = decodeArg();
labelsToIp[label] = ip;
} else if (op == 16) { //This is a NOP
decodeArg();
decodeArg();
} else {
Code1[ip++] = op;
for (i = 0; i < ArityTable[op]; i++, ip++) {
Code1[ip] = decodeArg();
}
}
}
if (Code1 instanceof Array) Code1.length = ip;
function decodeInt(b) {
if ((b & 8) == 0) {
// less than 16 NNNN:0:TTT
return b >> 4;
}
else if ((b & 16) == 0) {
// less than 2048 NNN:01:TTT NNNNNNNN
var highest_bits = (b & (32+64+128)) << 3;
var lowest_bits = a.getByte(pos++);
return highest_bits + lowest_bits;
}
else {
var len = b >> 5;
if (len == 7) {
var i, val = [], l = decodeInt(a.getByte(pos++)) + 9;
for (i = pos; i<l+pos; i++) val.push(a.getByte(i));
pos += l;
Code2.push(new Math.BigInt(val));
return (Code2.length-1) | (6 << 27);
} else {
var value = 0, bigval = [];
var negative = a.getByte(pos)>127;
len += 2;
for (var i = 0; i < len; i++) {
bigval.push(a.getByte(pos));
value = value * 256 + a.getByte(pos++);
}
if (negative) {
value = value - Math.pow(256,len);
Code2.push(value);
return (Code2.length-1) | (6 << 27);
}
if (is_small(value)) return value;
Code2.push(new Math.BigInt(bigval));
return (Code2.length-1) | (6 << 27);
}
}
}
function decodeArg() {
var b = a.getByte(pos++), type = b & 7;
if (type < 7) {
if (type == 1) type = 0;
var value = decodeInt(b);
if (is_bignum(value)) return value; //Don't tag bignums
return value | (type << 27);
} else {
switch(b >> 4) {
case 0: //float
pos += 8;
Code2.push({type:am_float, value:arrayToFloat(a, pos-8)});
return (Code2.length-1) | (6 << 27);
case 1: //select list
var list = [], len = decodeInt(a.getByte(pos++));
while(len-- > 0) list.push(decodeArg());
Code2.push(list);
return (Code2.length-1) | (6 << 27);
case 2: //fr TODO: optimize
Code2.push({type: 'fr', value: decodeInt(a.getByte(pos++))});
return (Code2.length-1) | (6 << 27);
case 3: //allocation list, (words, float, literals) //TODO does not seem to be needed
var len = decodeInt(a.getByte(pos++));
var list = [];
while(len-- > 0) {
list.push(decodeInt(a.getByte(pos++)));
list.push(decodeInt(a.getByte(pos++)));
}
Code2.push({type:'alist', list:list});
return (Code2.length-1) | (6 << 27);
case 4: //literal
Code2.push({type:'literal', value:decodeInt(a.getByte(pos++))});
return (Code2.length-1) | (6 << 27);
default:
throw 'Unknown extended type '+(b >> 4);
}
}
}
}
// Pass 2
function transformBeam() {
var op_ip, ip, j, k, op;
// Export table must use ref to instructions (ip) instead of labels
// Also, convert local atoms to global
var fun, globalExports = [];
for (fun in Exports) {
for (j = 0; j < Exports[fun].length; j++)
Exports[fun][j] = labelsToIp[Exports[fun][j]];
globalExports[localAtomToGlobal[fun]+(2<<27)] = Exports[fun];
}
// Convert labels in funs to ip
for (j = 0; j < Funs.length; j++) {
Funs[j][0] = labelsToIp[Funs[j][0]];
}
// Convert local atoms in import table
for (j = 0; j < Imports.length; j++) {
Imports[j][0] = localAtomToGlobal[Imports[j][0]]+(2<<27);
Imports[j][1] = localAtomToGlobal[Imports[j][1]]+(2<<27);
}