123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149 |
- /*************************************************************************/
- /* javascript_eval.cpp */
- /*************************************************************************/
- /* This file is part of: */
- /* GODOT ENGINE */
- /* https://godotengine.org */
- /*************************************************************************/
- /* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
- /* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
- /* */
- /* 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 "api/javascript_eval.h"
- #include "emscripten.h"
- extern "C" EMSCRIPTEN_KEEPALIVE uint8_t *resize_poolbytearray_and_open_write(PoolByteArray *p_arr, PoolByteArray::Write *r_write, int p_len) {
- p_arr->resize(p_len);
- *r_write = p_arr->write();
- return r_write->ptr();
- }
- Variant JavaScript::eval(const String &p_code, bool p_use_global_exec_context) {
- union {
- bool b;
- double d;
- char *s;
- } js_data;
- PoolByteArray arr;
- PoolByteArray::Write arr_write;
- /* clang-format off */
- Variant::Type return_type = static_cast<Variant::Type>(EM_ASM_INT({
- const CODE = $0;
- const USE_GLOBAL_EXEC_CONTEXT = $1;
- const PTR = $2;
- const BYTEARRAY_PTR = $3;
- const BYTEARRAY_WRITE_PTR = $4;
- var eval_ret;
- try {
- if (USE_GLOBAL_EXEC_CONTEXT) {
- // indirect eval call grants global execution context
- var global_eval = eval;
- eval_ret = global_eval(UTF8ToString(CODE));
- } else {
- eval_ret = eval(UTF8ToString(CODE));
- }
- } catch (e) {
- console.warn(e);
- eval_ret = null;
- }
- switch (typeof eval_ret) {
- case 'boolean':
- setValue(PTR, eval_ret, 'i32');
- return 1; // BOOL
- case 'number':
- setValue(PTR, 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(PTR, array_ptr , '*');
- stringToUTF8(eval_ret, array_ptr, array_len);
- return 4; // STRING
- } catch (e) {
- if (array_ptr!==0) {
- _free(array_ptr)
- }
- console.warn(e);
- // fall through
- }
- break;
- case 'object':
- if (eval_ret === null) {
- break;
- }
- if (ArrayBuffer.isView(eval_ret) && !(eval_ret instanceof Uint8Array)) {
- eval_ret = new Uint8Array(eval_ret.buffer);
- }
- else if (eval_ret instanceof ArrayBuffer) {
- eval_ret = new Uint8Array(eval_ret);
- }
- if (eval_ret instanceof Uint8Array) {
- var bytes_ptr = ccall('resize_poolbytearray_and_open_write', 'number', ['number', 'number' ,'number'], [BYTEARRAY_PTR, BYTEARRAY_WRITE_PTR, eval_ret.length]);
- HEAPU8.set(eval_ret, bytes_ptr);
- return 20; // POOL_BYTE_ARRAY
- }
- break;
- }
- return 0; // NIL
- }, p_code.utf8().get_data(), p_use_global_exec_context, &js_data, &arr, &arr_write));
- /* clang-format on */
- switch (return_type) {
- case Variant::BOOL:
- return js_data.b;
- case Variant::REAL:
- return js_data.d;
- case Variant::STRING: {
- String str = String::utf8(js_data.s);
- /* clang-format off */
- EM_ASM_({ _free($0); }, js_data.s);
- /* clang-format on */
- return str;
- }
- case Variant::POOL_BYTE_ARRAY:
- arr_write = PoolByteArray::Write();
- return arr;
- default:
- return Variant();
- }
- }
- #endif // JAVASCRIPT_EVAL_ENABLED
|