mirror of
https://github.com/pocketpy/pocketpy
synced 2025-10-26 14:30:17 +00:00
93 lines
3.0 KiB
Dart
93 lines
3.0 KiB
Dart
// ignore_for_file: prefer_function_declarations_over_variables, non_constant_identifier_names, no_leading_underscores_for_local_identifiers
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import 'dart:convert' as cvt;
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import 'package:js/js.dart';
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import 'common.dart';
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@JS("Module.ccall")
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external dynamic ccall(
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String name, String? returnType, List<String> argTypes, List<dynamic> args);
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class _Bindings {
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static final pkpy_delete =
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(dynamic p) => ccall("pkpy_delete", null, ["number"], [p]);
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static final pkpy_new_repl =
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(dynamic vm) => ccall("pkpy_new_repl", "number", ["number"], [vm]);
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static final pkpy_repl_input = (dynamic r, String line) =>
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ccall("pkpy_repl_input", "boolean", ["number", "string"], [r, line]);
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static final pkpy_new_vm = (bool use_stdio) =>
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ccall("pkpy_new_vm", "number", ["boolean"], [use_stdio]);
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static final pkpy_vm_add_module = (dynamic vm, String name, String source) =>
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ccall("pkpy_vm_add_module", null, ["number", "string", "string"],
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[vm, name, source]);
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static final pkpy_vm_eval = (dynamic vm, String source) =>
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ccall("pkpy_vm_eval", "string", ["number", "string"], [vm, source]);
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static final pkpy_vm_exec = (dynamic vm, String source) =>
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ccall("pkpy_vm_exec", null, ["number", "string"], [vm, source]);
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static final pkpy_vm_get_global = (dynamic vm, String name) =>
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ccall("pkpy_vm_get_global", "string", ["number", "string"], [vm, name]);
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static final pkpy_vm_read_output =
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(dynamic vm) => ccall("pkpy_vm_read_output", "string", ["number"], [vm]);
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}
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class VM {
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late final pointer = _Bindings.pkpy_new_vm(false);
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static bool _firstNew = true;
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VM() {
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if (!_firstNew) return;
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_firstNew = false;
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}
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void dispose() {
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_Bindings.pkpy_delete(pointer);
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}
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PyOutput read_output() {
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var _o = _Bindings.pkpy_vm_read_output(pointer);
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String _j = _o;
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var ret = PyOutput.fromJson(cvt.jsonDecode(_j));
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return ret;
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}
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/// Add a source module into a virtual machine.
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void add_module(String name, String source) {
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_Bindings.pkpy_vm_add_module(pointer, name, source);
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}
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/// Evaluate an expression. Return `__repr__` of the result. If there is any error, return `nullptr`.
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String? eval(String source) {
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var ret = _Bindings.pkpy_vm_eval(pointer, source);
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return ret;
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}
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/// Run a given source on a virtual machine.
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void exec(String source) {
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_Bindings.pkpy_vm_exec(pointer, source);
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}
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/// Get a global variable of a virtual machine. Return `__repr__` of the result. If the variable is not found, return `nullptr`.
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String? get_global(String name) {
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var ret = _Bindings.pkpy_vm_get_global(pointer, name);
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return ret;
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}
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}
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class REPL {
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late final dynamic pointer;
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REPL(VM vm) {
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pointer = _Bindings.pkpy_new_repl(vm.pointer);
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}
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void dispose() {
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_Bindings.pkpy_delete(pointer);
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}
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/// Input a source line to an interactive console. Return true if need more lines.
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bool input(String line) {
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var ret = _Bindings.pkpy_repl_input(pointer, line);
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return ret;
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}
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}
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