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comparison py.js @ 0:e985e6d762b9 default tip

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Origination.
author Atul Varma <varmaa@toolness.com>
date Wed, 24 Sep 2008 16:47:18 -0700
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-1:000000000000 0:e985e6d762b9
1 function Py(code) {
2 if ('Py' in this)
3 throw new Error("Py() must be called with 'new' keyword");
4
5 var self = this;
6
7 var co_code = code.co_code;
8 var co_consts = code.co_consts;
9 var co_names = code.co_names;
10
11 var ops = {};
12 var stack = [];
13 var globals = {};
14 var locals = {};
15
16 ops.LOAD_CONST = function LOAD_CONST(index) {
17 stack.push(co_consts[index]);
18 };
19
20 ops.LOAD_NAME = function LOAD_NAME(index) {
21 stack.push(locals[co_names[index]]);
22 };
23
24 ops.BINARY_ADD = function BINARY_ADD() {
25 stack.push(stack.pop() + stack.pop());
26 };
27
28 ops.STORE_NAME = function STORE_NAME(index) {
29 locals[co_names[index]] = stack.pop();
30 };
31
32 ops.STORE_GLOBAL = function STORE_GLOBAL(index) {
33 globals[co_names[index]] = stack.pop();
34 };
35
36 ops.RETURN_VALUE = function RETURN_VALUE() {
37 self.returnValue = stack.pop();
38 };
39
40 for (var i = 0; i < co_code.ops.length; i++) {
41 var op = co_code.ops[i].op;
42 var arg = co_code.ops[i].arg;
43 if (!(op in ops))
44 throw new Error('No implementation for op ' + op);
45 ops[op](arg);
46 }
47
48 self.locals = locals;
49 self.globals = globals;
50 }