diff options
Diffstat (limited to 'platform/javascript/javascript_eval.cpp')
| -rw-r--r-- | platform/javascript/javascript_eval.cpp | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/platform/javascript/javascript_eval.cpp b/platform/javascript/javascript_eval.cpp new file mode 100644 index 0000000000..e642300bda --- /dev/null +++ b/platform/javascript/javascript_eval.cpp @@ -0,0 +1,169 @@ +/*************************************************************************/ +/* javascript_eval.cpp */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* http://www.godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur. */ +/* */ +/* Permission is hereby granted, free of charge, to any person obtaining */ +/* a copy of this software and associated documentation files (the */ +/* "Software"), to deal in the Software without restriction, including */ +/* without limitation the rights to use, copy, modify, merge, publish, */ +/* distribute, sublicense, and/or sell copies of the Software, and to */ +/* permit persons to whom the Software is furnished to do so, subject to */ +/* the following conditions: */ +/* */ +/* The above copyright notice and this permission notice shall be */ +/* included in all copies or substantial portions of the Software. */ +/* */ +/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ +/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ +/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ +/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ +/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ +/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ +/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +/*************************************************************************/ +#ifdef JAVASCRIPT_EVAL_ENABLED + +#include "javascript_eval.h" +#include "emscripten.h" + +JavaScript *JavaScript::singleton=NULL; + +JavaScript *JavaScript::get_singleton() { + + return singleton; +} + +Variant JavaScript::eval(const String& p_code, bool p_use_global_exec_context) { + + union { int i; double d; char* s; } js_data[4]; + Variant::Type return_type = static_cast<Variant::Type>(EM_ASM_INT({ + + var eval_ret; + try { + if ($3) { // p_use_global_exec_context + // indirect eval call grants global execution context + var global_eval = eval; + eval_ret = global_eval(UTF8ToString($2)); + } + else { + eval_ret = eval(UTF8ToString($2)); + } + } catch (e) { + Module.printErr(e); + eval_ret = null; + } + + switch (typeof eval_ret) { + + case 'boolean': + // bitwise op yields 32-bit int + setValue($0, eval_ret|0, 'i32'); + return 1; // BOOL + + case 'number': + if ((eval_ret|0)===eval_ret) { + setValue($0, eval_ret|0, 'i32'); + return 2; // INT + } + setValue($0, eval_ret, 'double'); + return 3; // REAL + + case 'string': + var array_len = lengthBytesUTF8(eval_ret)+1; + var array_ptr = _malloc(array_len); + try { + if (array_ptr===0) { + throw new Error('String allocation failed (probably out of memory)'); + } + setValue($0, array_ptr|0 , '*'); + stringToUTF8(eval_ret, array_ptr, array_len); + return 4; // STRING + } catch (e) { + if (array_ptr!==0) { + _free(array_ptr) + } + Module.printErr(e); + // fall through + } + break; + + case 'object': + if (eval_ret === null) { + break; + } + + else if (typeof eval_ret.x==='number' && typeof eval_ret.y==='number') { + setValue($0, eval_ret.x, 'double'); + setValue($0+$1, eval_ret.y, 'double'); + if (typeof eval_ret.z==='number') { + setValue($0+$1*2, eval_ret.z, 'double'); + return 7; // VECTOR3 + } + else if (typeof eval_ret.width==='number' && typeof eval_ret.height==='number') { + setValue($0+$1*2, eval_ret.width, 'double'); + setValue($0+$1*3, eval_ret.height, 'double'); + return 6; // RECT2 + } + return 5; // VECTOR2 + } + + else if (typeof eval_ret.r==='number' && typeof eval_ret.g==='number' && typeof eval_ret.b==='number') { + // assume 8-bit rgb components since we're on the web + setValue($0, eval_ret.r, 'double'); + setValue($0+$1, eval_ret.g, 'double'); + setValue($0+$1*2, eval_ret.b, 'double'); + setValue($0+$1*3, typeof eval_ret.a==='number' ? eval_ret.a : 1, 'double'); + return 14; // COLOR + } + break; + } + return 0; // NIL + + }, js_data, sizeof *js_data, p_code.utf8().get_data(), p_use_global_exec_context)); + + switch(return_type) { + case Variant::BOOL: + return !!js_data->i; + case Variant::INT: + return js_data->i; + case Variant::REAL: + return js_data->d; + case Variant::STRING: + { + String str = String::utf8(js_data->s); + EM_ASM_({ _free($0); }, js_data->s); + return str; + } + case Variant::VECTOR2: + return Vector2(js_data[0].d, js_data[1].d); + case Variant::VECTOR3: + return Vector3(js_data[0].d, js_data[1].d, js_data[2].d); + case Variant::RECT2: + return Rect2(js_data[0].d, js_data[1].d, js_data[2].d, js_data[3].d); + case Variant::COLOR: + return Color(js_data[0].d/255., js_data[1].d/255., js_data[2].d/255., js_data[3].d); + } + return Variant(); +} + +void JavaScript::_bind_methods() { + + ObjectTypeDB::bind_method(_MD("eval", "code", "use_global_execution_context"), &JavaScript::eval, false); +} + +JavaScript::JavaScript() { + + ERR_FAIL_COND(singleton != NULL); + singleton = this; +} + +JavaScript::~JavaScript() { + +} + +#endif // JAVASCRIPT_EVAL_ENABLED |