mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 13:23:56 -07:00
9150c20818
The first header was used to include the SpiderMonkey JS API at once, with safeguards and preprocessor defines. Nowadays, SpiderMonkey provides modular headers allowing us to include what we use, refs #8086. Some defines have to be moved to compiler options but it is apparently a mistake from the SM developers: https://bugzilla.mozilla.org/show_bug.cgi?id=1987876
135 lines
3.7 KiB
C++
135 lines
3.7 KiB
C++
/* Copyright (C) 2025 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 "JSON.h"
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#include "lib/file/vfs/vfs_path.h"
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#include "lib/status.h"
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#include "lib/types.h"
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#include "lib/utf8.h"
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#include "ps/CLogger.h"
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#include "ps/CStr.h"
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#include "ps/Errors.h"
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#include "ps/Filesystem.h"
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#include "scriptinterface/FunctionWrapper.h"
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#include "scriptinterface/ScriptExceptions.h"
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#include "scriptinterface/ScriptRequest.h"
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#include <js/Exception.h>
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#include <js/JSON.h>
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#include <js/RootingAPI.h>
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#include <js/Value.h>
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#include <sstream>
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#include <string>
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bool Script::ParseJSON(const ScriptRequest& rq, const std::string& string_utf8, JS::MutableHandleValue out)
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{
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std::wstring attrsW = wstring_from_utf8(string_utf8);
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std::u16string string(attrsW.begin(), attrsW.end());
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if (JS_ParseJSON(rq.cx, string.c_str(), (u32)string.size(), out))
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return true;
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ScriptException::CatchPending(rq);
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return false;
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}
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void Script::ReadJSONFile(const ScriptRequest& rq, const VfsPath& path, JS::MutableHandleValue out)
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{
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if (!VfsFileExists(path))
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{
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LOGERROR("File '%s' does not exist", path.string8());
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return;
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}
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CVFSFile file;
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PSRETURN ret = file.Load(g_VFS, path);
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if (ret != PSRETURN_OK)
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{
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LOGERROR("Failed to load file '%s': %s", path.string8(), GetErrorString(ret));
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return;
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}
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std::string content(file.DecodeUTF8()); // assume it's UTF-8
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if (!ParseJSON(rq, content, out))
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LOGERROR("Failed to parse '%s'", path.string8());
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}
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namespace
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{
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struct Stringifier
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{
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static bool callback(const char16_t* buf, u32 len, void* data)
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{
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std::u16string str(buf, buf+len);
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std::wstring strw(str.begin(), str.end());
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Status err; // ignore Unicode errors
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static_cast<Stringifier*>(data)->stream << utf8_from_wstring(strw, &err);
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return true;
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}
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std::stringstream stream;
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};
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} // anonymous namespace
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// JS_Stringify takes a mutable object because ToJSON may arbitrarily mutate the value.
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// TODO: it'd be nice to have a non-mutable variant.
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std::string Script::StringifyJSON(const ScriptRequest& rq, JS::MutableHandleValue obj, bool indent)
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{
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Stringifier str;
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JS::RootedValue indentVal(rq.cx, indent ? JS::Int32Value(2) : JS::UndefinedValue());
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if (!JS_Stringify(rq.cx, obj, nullptr, indentVal, &Stringifier::callback, &str))
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{
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ScriptException::CatchPending(rq);
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return std::string();
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}
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return str.stream.str();
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}
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std::string Script::ToString(const ScriptRequest& rq, JS::MutableHandleValue obj, bool pretty)
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{
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if (obj.isUndefined())
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return "(void 0)";
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// Try to stringify as JSON if possible
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// (TODO: this is maybe a bad idea since it'll drop 'undefined' values silently)
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if (pretty)
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{
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Stringifier str;
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JS::RootedValue indentVal(rq.cx, JS::Int32Value(2));
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if (JS_Stringify(rq.cx, obj, nullptr, indentVal, &Stringifier::callback, &str))
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return str.stream.str();
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// Drop exceptions raised by cyclic values before trying something else
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JS_ClearPendingException(rq.cx);
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}
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// Caller didn't want pretty output, or JSON conversion failed (e.g. due to cycles),
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// so fall back to obj.toSource()
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std::wstring source = L"(error)";
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ScriptFunction::Call(rq, obj, "toSource", source);
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return utf8_from_wstring(source);
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}
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