149 lines
4.9 KiB
C++
149 lines
4.9 KiB
C++
/*************************************************************************/
|
|
/* javascript_eval.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 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) {
|
|
err(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)
|
|
}
|
|
err(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
|