347 lines
9.9 KiB
C++
347 lines
9.9 KiB
C++
/* Copyright (C) 2012 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "ScriptInterface.h"
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#include "graphics/Entity.h"
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#include "ps/utf16string.h"
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#include "ps/CLogger.h"
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#include "ps/CStr.h"
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#include "scriptinterface/ScriptExtraHeaders.h" // for typed arrays
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#define FAIL(msg) STMT(JS_ReportError(cx, msg); return false)
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// Implicit type conversions often hide bugs, so warn about them
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#define WARN_IF_NOT(c, v) STMT(if (!(c)) { JS_ReportWarning(cx, "Script value conversion check failed: %s (got type %s)", #c, JS_GetTypeName(cx, JS_TypeOfValue(cx, v))); })
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template<> bool ScriptInterface::FromJSVal<bool>(JSContext* cx, jsval v, bool& out)
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{
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JSBool ret;
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WARN_IF_NOT(JSVAL_IS_BOOLEAN(v), v);
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if (!JS_ValueToBoolean(cx, v, &ret))
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return false;
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out = (ret ? true : false);
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<float>(JSContext* cx, jsval v, float& out)
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{
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jsdouble ret;
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WARN_IF_NOT(JSVAL_IS_NUMBER(v), v);
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if (!JS_ValueToNumber(cx, v, &ret))
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return false;
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out = ret;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<double>(JSContext* cx, jsval v, double& out)
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{
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jsdouble ret;
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WARN_IF_NOT(JSVAL_IS_NUMBER(v), v);
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if (!JS_ValueToNumber(cx, v, &ret))
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return false;
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out = ret;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<i32>(JSContext* cx, jsval v, i32& out)
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{
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int32 ret;
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WARN_IF_NOT(JSVAL_IS_NUMBER(v), v);
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if (!JS_ValueToECMAInt32(cx, v, &ret))
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return false;
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out = ret;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<u32>(JSContext* cx, jsval v, u32& out)
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{
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uint32 ret;
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WARN_IF_NOT(JSVAL_IS_NUMBER(v), v);
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if (!JS_ValueToECMAUint32(cx, v, &ret))
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return false;
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out = ret;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<u16>(JSContext* cx, jsval v, u16& out)
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{
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uint16 ret;
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WARN_IF_NOT(JSVAL_IS_NUMBER(v), v);
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if (!JS_ValueToUint16(cx, v, &ret))
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return false;
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out = ret;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<u8>(JSContext* cx, jsval v, u8& out)
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{
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uint16 ret;
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WARN_IF_NOT(JSVAL_IS_NUMBER(v), v);
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if (!JS_ValueToUint16(cx, v, &ret))
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return false;
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out = (u8)ret;
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return true;
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}
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// NOTE: we can't define a jsval specialisation, because that conflicts with integer types
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template<> bool ScriptInterface::FromJSVal<CScriptVal>(JSContext* UNUSED(cx), jsval v, CScriptVal& out)
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{
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out = v;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<CScriptValRooted>(JSContext* cx, jsval v, CScriptValRooted& out)
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{
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out = CScriptValRooted(cx, v);
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<std::wstring>(JSContext* cx, jsval v, std::wstring& out)
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{
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WARN_IF_NOT(JSVAL_IS_STRING(v) || JSVAL_IS_NUMBER(v), v); // allow implicit number conversions
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JSString* ret = JS_ValueToString(cx, v);
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if (!ret)
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FAIL("Argument must be convertible to a string");
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size_t length;
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const jschar* ch = JS_GetStringCharsAndLength(cx, ret, &length);
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if (!ch)
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FAIL("JS_GetStringsCharsAndLength failed"); // out of memory
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out = std::wstring(ch, ch + length);
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<Path>(JSContext* cx, jsval v, Path& out)
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{
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std::wstring string;
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if (!FromJSVal(cx, v, string))
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return false;
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out = string;
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<std::string>(JSContext* cx, jsval v, std::string& out)
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{
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WARN_IF_NOT(JSVAL_IS_STRING(v) || JSVAL_IS_NUMBER(v), v); // allow implicit number conversions
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JSString* ret = JS_ValueToString(cx, v);
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if (!ret)
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FAIL("Argument must be convertible to a string");
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char* ch = JS_EncodeString(cx, ret); // chops off high byte of each jschar
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if (!ch)
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FAIL("JS_EncodeString failed"); // out of memory
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out = std::string(ch, ch + JS_GetStringLength(ret));
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JS_free(cx, ch);
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return true;
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}
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template<> bool ScriptInterface::FromJSVal<Entity>(JSContext* cx, jsval v, Entity& out)
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{
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JSObject* obj;
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if (!JS_ValueToObject(cx, v, &obj) || obj == NULL)
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FAIL("Argument must be an object");
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jsval templateName, id, player, position, rotation;
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// TODO: Report type errors
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if(!JS_GetProperty(cx, obj, "player", &player) || !FromJSVal(cx, player, out.playerID))
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FAIL("Failed to read Entity.player property");
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if (!JS_GetProperty(cx, obj, "templateName", &templateName) || !FromJSVal(cx, templateName, out.templateName))
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FAIL("Failed to read Entity.templateName property");
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if (!JS_GetProperty(cx, obj, "id", &id) || !FromJSVal(cx, id, out.entityID))
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FAIL("Failed to read Entity.id property");
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if (!JS_GetProperty(cx, obj, "position", &position) || !FromJSVal(cx, position, out.position))
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FAIL("Failed to read Entity.position property");
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if (!JS_GetProperty(cx, obj, "rotation", &rotation) || !FromJSVal(cx, rotation, out.rotation))
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FAIL("Failed to read Entity.rotation property");
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return true;
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}
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////////////////////////////////////////////////////////////////
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// Primitive types:
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template<> jsval ScriptInterface::ToJSVal<bool>(JSContext* UNUSED(cx), const bool& val)
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{
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return val ? JSVAL_TRUE : JSVAL_FALSE;
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}
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template<> jsval ScriptInterface::ToJSVal<float>(JSContext* cx, const float& val)
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{
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jsval rval = JSVAL_VOID;
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JS_NewNumberValue(cx, val, &rval); // ignore return value
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return rval;
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}
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template<> jsval ScriptInterface::ToJSVal<double>(JSContext* cx, const double& val)
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{
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jsval rval = JSVAL_VOID;
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JS_NewNumberValue(cx, val, &rval); // ignore return value
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return rval;
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}
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template<> jsval ScriptInterface::ToJSVal<i32>(JSContext* UNUSED(cx), const i32& val)
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{
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cassert(JSVAL_INT_BITS == 32);
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return INT_TO_JSVAL(val);
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}
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template<> jsval ScriptInterface::ToJSVal<u16>(JSContext* UNUSED(cx), const u16& val)
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{
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return INT_TO_JSVAL(val);
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}
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template<> jsval ScriptInterface::ToJSVal<u8>(JSContext* UNUSED(cx), const u8& val)
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{
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return INT_TO_JSVAL(val);
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}
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template<> jsval ScriptInterface::ToJSVal<u32>(JSContext* cx, const u32& val)
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{
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if (val <= JSVAL_INT_MAX)
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return INT_TO_JSVAL(val);
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jsval rval = JSVAL_VOID;
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JS_NewNumberValue(cx, val, &rval); // ignore return value
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return rval;
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}
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// NOTE: we can't define a jsval specialisation, because that conflicts with integer types
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template<> jsval ScriptInterface::ToJSVal<CScriptVal>(JSContext* UNUSED(cx), const CScriptVal& val)
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{
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return val.get();
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}
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template<> jsval ScriptInterface::ToJSVal<CScriptValRooted>(JSContext* UNUSED(cx), const CScriptValRooted& val)
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{
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return val.get();
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}
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template<> jsval ScriptInterface::ToJSVal<std::wstring>(JSContext* cx, const std::wstring& val)
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{
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utf16string utf16(val.begin(), val.end());
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JSString* str = JS_NewUCStringCopyN(cx, reinterpret_cast<const jschar*> (utf16.c_str()), utf16.length());
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if (str)
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return STRING_TO_JSVAL(str);
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return JSVAL_VOID;
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}
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template<> jsval ScriptInterface::ToJSVal<Path>(JSContext* cx, const Path& val)
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{
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return ToJSVal(cx, val.string());
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}
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template<> jsval ScriptInterface::ToJSVal<std::string>(JSContext* cx, const std::string& val)
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{
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JSString* str = JS_NewStringCopyN(cx, val.c_str(), val.length());
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if (str)
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return STRING_TO_JSVAL(str);
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return JSVAL_VOID;
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}
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template<> jsval ScriptInterface::ToJSVal<const wchar_t*>(JSContext* cx, const wchar_t* const& val)
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{
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return ToJSVal(cx, std::wstring(val));
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}
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template<> jsval ScriptInterface::ToJSVal<const char*>(JSContext* cx, const char* const& val)
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{
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JSString* str = JS_NewStringCopyZ(cx, val);
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if (str)
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return STRING_TO_JSVAL(str);
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return JSVAL_VOID;
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}
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template<> jsval ScriptInterface::ToJSVal<CStrW>(JSContext* cx, const CStrW& val)
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{
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return ToJSVal(cx, static_cast<const std::wstring&>(val));
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}
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template<> jsval ScriptInterface::ToJSVal<CStr8>(JSContext* cx, const CStr8& val)
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{
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return ToJSVal(cx, static_cast<const std::string&>(val));
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}
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////////////////////////////////////////////////////////////////
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// Compound types:
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template<typename T> static jsval ToJSVal_vector(JSContext* cx, const std::vector<T>& val)
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{
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JSObject* obj = JS_NewArrayObject(cx, val.size(), NULL);
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if (!obj)
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return JSVAL_VOID;
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for (size_t i = 0; i < val.size(); ++i)
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{
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jsval el = ScriptInterface::ToJSVal<T>(cx, val[i]);
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JS_SetElement(cx, obj, (jsint)i, &el);
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}
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return OBJECT_TO_JSVAL(obj);
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}
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template<typename T> static bool FromJSVal_vector(JSContext* cx, jsval v, std::vector<T>& out)
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{
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JSObject* obj;
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if (!JS_ValueToObject(cx, v, &obj) || obj == NULL || !(JS_IsArrayObject(cx, obj) || js_IsTypedArray(obj)))
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FAIL("Argument must be an array");
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jsuint length;
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if (!JS_GetArrayLength(cx, obj, &length))
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FAIL("Failed to get array length");
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out.reserve(length);
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for (jsuint i = 0; i < length; ++i)
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{
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jsval el;
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if (!JS_GetElement(cx, obj, i, &el))
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FAIL("Failed to read array element");
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T el2;
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if (!ScriptInterface::FromJSVal<T>(cx, el, el2))
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return false;
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out.push_back(el2);
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}
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return true;
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}
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// Instantiate various vector types:
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#define VECTOR(T) \
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template<> jsval ScriptInterface::ToJSVal<std::vector<T> >(JSContext* cx, const std::vector<T>& val) \
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{ \
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return ToJSVal_vector(cx, val); \
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} \
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template<> bool ScriptInterface::FromJSVal<std::vector<T> >(JSContext* cx, jsval v, std::vector<T>& out) \
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{ \
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return FromJSVal_vector(cx, v, out); \
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}
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VECTOR(int)
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VECTOR(u32)
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VECTOR(u16)
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VECTOR(std::string)
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VECTOR(std::wstring)
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VECTOR(CScriptValRooted)
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class IComponent;
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template<> jsval ScriptInterface::ToJSVal<std::vector<IComponent*> >(JSContext* cx, const std::vector<IComponent*>& val)
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{
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return ToJSVal_vector(cx, val);
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}
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template<> bool ScriptInterface::FromJSVal<std::vector<Entity> >(JSContext* cx, jsval v, std::vector<Entity>& out)
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{
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return FromJSVal_vector(cx, v, out);
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}
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