Method load

source/python.js:3902–4296

()

                };
            }
            load() {
                const reader = this._reader;
                const marker = [];
                let stack = new builtins.list();
                const memo = {};
                let size = 0;
                while (reader.position < reader.length) {
                    const opcode = reader.byte();
                    // console.log(`${(reader.position - 1).toString()} ${opcode}`);
                    // https://svn.python.org/projects/python/trunk/Lib/pickletools.py
                    // https://github.com/python/cpython/blob/master/Lib/pickle.py
                    switch (opcode) {
                        case 128: { // PROTO
                            const version = reader.byte();
                            if (version > 5) {
                                throw new python.Error(`Unsupported protocol version '${version}'.`);
                            }
                            break;
                        }
                        case 99: { // GLOBAL 'c'
                            const module = reader.line();
                            const name = reader.line();
                            stack.push(this.find_class(module, name));
                            break;
                        }
                        case 147: { // STACK_GLOBAL '\x93' (Protocol 4)
                            const name = stack.pop();
                            const module = stack.pop();
                            stack.push(this.find_class(module, name));
                            break;
                        }
                        case 111: { // OBJ 'o'
                            const args = stack;
                            const cls = args.pop();
                            stack = marker.pop();
                            const obj = this._instantiate(cls, args);
                            stack.push(obj);
                            break;
                        }
                        case 112 : { // PUT 'p'
                            const index = parseInt(reader.line(), 10);
                            if (stack.length === 0) {
                                throw new python.Error(`Empty stack during 'PUT' operation.`);
                            }
                            memo[index] = stack[stack.length - 1];
                            size++;
                            break;
                        }
                        case 103: { // GET 'g'
                            const index = parseInt(reader.line(), 10);
                            if (index in memo === false) {
                                throw new python.Error(`Memo value not found at index '${index}'.`);
                            }
                            stack.push(memo[index]);
                            break;
                        }
                        case 48: // POP '0'
                            stack.pop();