175 lines
5.8 KiB
C++
175 lines
5.8 KiB
C++
/*************************************************************************/
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/* javascript_eval.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifdef JAVASCRIPT_EVAL_ENABLED
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#include "javascript_eval.h"
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#include "emscripten.h"
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JavaScript *JavaScript::singleton = NULL;
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JavaScript *JavaScript::get_singleton() {
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return singleton;
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}
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Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
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union {
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int i;
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double d;
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char *s;
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} js_data[4];
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/* clang-format off */
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Variant::Type return_type = static_cast<Variant::Type>(EM_ASM_INT({
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var eval_ret;
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try {
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if ($3) { // p_use_global_exec_context
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// indirect eval call grants global execution context
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var global_eval = eval;
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eval_ret = global_eval(UTF8ToString($2));
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} else {
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eval_ret = eval(UTF8ToString($2));
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}
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} catch (e) {
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Module.printErr(e);
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eval_ret = null;
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}
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switch (typeof eval_ret) {
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case 'boolean':
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// bitwise op yields 32-bit int
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setValue($0, eval_ret|0, 'i32');
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return 1; // BOOL
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case 'number':
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if ((eval_ret|0)===eval_ret) {
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setValue($0, eval_ret|0, 'i32');
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return 2; // INT
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}
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setValue($0, eval_ret, 'double');
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return 3; // REAL
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case 'string':
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var array_len = lengthBytesUTF8(eval_ret)+1;
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var array_ptr = _malloc(array_len);
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try {
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if (array_ptr===0) {
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throw new Error('String allocation failed (probably out of memory)');
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}
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setValue($0, array_ptr|0 , '*');
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stringToUTF8(eval_ret, array_ptr, array_len);
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return 4; // STRING
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} catch (e) {
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if (array_ptr!==0) {
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_free(array_ptr)
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}
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Module.printErr(e);
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// fall through
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}
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break;
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case 'object':
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if (eval_ret === null) {
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break;
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}
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else if (typeof eval_ret.x==='number' && typeof eval_ret.y==='number') {
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setValue($0, eval_ret.x, 'double');
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setValue($0+$1, eval_ret.y, 'double');
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if (typeof eval_ret.z==='number') {
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setValue($0+$1*2, eval_ret.z, 'double');
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return 7; // VECTOR3
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}
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else if (typeof eval_ret.width==='number' && typeof eval_ret.height==='number') {
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setValue($0+$1*2, eval_ret.width, 'double');
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setValue($0+$1*3, eval_ret.height, 'double');
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return 6; // RECT2
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}
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return 5; // VECTOR2
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}
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else if (typeof eval_ret.r==='number' && typeof eval_ret.g==='number' && typeof eval_ret.b==='number') {
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// assume 8-bit rgb components since we're on the web
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setValue($0, eval_ret.r, 'double');
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setValue($0+$1, eval_ret.g, 'double');
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setValue($0+$1*2, eval_ret.b, 'double');
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setValue($0+$1*3, typeof eval_ret.a==='number' ? eval_ret.a : 1, 'double');
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return 14; // COLOR
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}
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break;
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}
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return 0; // NIL
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}, js_data, sizeof *js_data, p_code.utf8().get_data(), p_use_global_exec_context));
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/* clang-format on */
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switch (return_type) {
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case Variant::BOOL:
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return !!js_data->i;
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case Variant::INT:
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return js_data->i;
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case Variant::REAL:
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return js_data->d;
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case Variant::STRING: {
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String str = String::utf8(js_data->s);
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/* clang-format off */
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EM_ASM_({ _free($0); }, js_data->s);
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/* clang-format on */
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return str;
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}
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case Variant::VECTOR2:
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return Vector2(js_data[0].d, js_data[1].d);
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case Variant::VECTOR3:
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return Vector3(js_data[0].d, js_data[1].d, js_data[2].d);
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case Variant::RECT2:
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return Rect2(js_data[0].d, js_data[1].d, js_data[2].d, js_data[3].d);
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case Variant::COLOR:
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return Color(js_data[0].d / 255., js_data[1].d / 255., js_data[2].d / 255., js_data[3].d);
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}
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return Variant();
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}
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void JavaScript::_bind_methods() {
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ObjectTypeDB::bind_method(_MD("eval", "code", "use_global_execution_context"), &JavaScript::eval, false);
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}
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JavaScript::JavaScript() {
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ERR_FAIL_COND(singleton != NULL);
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singleton = this;
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}
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JavaScript::~JavaScript() {
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}
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#endif // JAVASCRIPT_EVAL_ENABLED
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