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#pragma once
#include "headers.h"
#include "root.h"
#include <JavaScriptCore/Error.h>
#include <JavaScriptCore/Exception.h>
#include <JavaScriptCore/Identifier.h>
#include <JavaScriptCore/JSCInlines.h>
#include <JavaScriptCore/JSString.h>
#include <JavaScriptCore/JSValueInternal.h>
#include <JavaScriptCore/ThrowScope.h>
#include <JavaScriptCore/VM.h>
template <class CppType, typename ZigType> class Wrap {
public:
Wrap(){};
Wrap(ZigType zig) {
result = zig;
cpp = static_cast<CppType *>(static_cast<void *>(&zig));
};
Wrap(ZigType *zig) { cpp = static_cast<CppType *>(static_cast<void *>(&zig)); };
Wrap(CppType _cpp) {
auto buffer = alignedBuffer();
cpp = new (buffer) CppType(_cpp);
};
~Wrap(){};
unsigned char *alignedBuffer() {
return result.bytes + alignof(CppType) -
reinterpret_cast<intptr_t>(result.bytes) % alignof(CppType);
}
ZigType result;
CppType *cpp;
static ZigType wrap(CppType obj) { return *static_cast<ZigType *>(static_cast<void *>(&obj)); }
static CppType unwrap(ZigType obj) { return *static_cast<CppType *>(static_cast<void *>(&obj)); }
static CppType *unwrap(ZigType *obj) { return static_cast<CppType *>(static_cast<void *>(obj)); }
};
template <class To, class From> To cast(From v) {
return *static_cast<To *>(static_cast<void *>(v));
}
template <class To, class From> To ccast(From v) {
return *static_cast<const To *>(static_cast<const void *>(v));
}
typedef JSC__JSValue (*NativeCallbackFunction)(void *arg0, JSC__JSGlobalObject *arg1,
JSC__CallFrame *arg2);
static const JSC::ArgList makeArgs(JSC__JSValue *v, size_t count) {
JSC::MarkedArgumentBuffer args = JSC::MarkedArgumentBuffer();
args.ensureCapacity(count);
for (size_t i = 0; i < count; ++i) { args.append(JSC::JSValue::decode(v[i])); }
return JSC::ArgList(args);
}
namespace Zig {
// 8 bit byte
// we tag the final two bits
// so 56 bits are copied over
// rest we zero out for consistentcy
static const unsigned char *untag(const unsigned char *ptr) {
return reinterpret_cast<const unsigned char *>(
((reinterpret_cast<uintptr_t>(ptr) & ~(static_cast<uint64_t>(1) << 63) &
~(static_cast<uint64_t>(1) << 62)) &
~(static_cast<uint64_t>(1) << 61)));
}
static const JSC::Identifier toIdentifier(ZigString str, JSC::JSGlobalObject *global) {
if (str.len == 0 || str.ptr == nullptr) { return JSC::Identifier::EmptyIdentifier; }
return JSC::Identifier::fromString(global->vm(), untag(str.ptr), str.len);
}
static bool isTaggedUTF16Ptr(const unsigned char *ptr) {
return (reinterpret_cast<uintptr_t>(ptr) & (static_cast<uint64_t>(1) << 63)) != 0;
}
// Do we need to upcase the string?
static bool isTaggedUTF8Ptr(const unsigned char *ptr) {
return (reinterpret_cast<uintptr_t>(ptr) & (static_cast<uint64_t>(1) << 61)) != 0;
}
static bool isTaggedExternalPtr(const unsigned char *ptr) {
return (reinterpret_cast<uintptr_t>(ptr) & (static_cast<uint64_t>(1) << 62)) != 0;
}
static const WTF::String toString(ZigString str) {
if (str.len == 0 || str.ptr == nullptr) { return WTF::String(); }
if (UNLIKELY(isTaggedUTF8Ptr(str.ptr))) { return WTF::String::fromUTF8(untag(str.ptr), str.len); }
return !isTaggedUTF16Ptr(str.ptr)
? WTF::String(WTF::StringImpl::createWithoutCopying(untag(str.ptr), str.len))
: WTF::String(WTF::StringImpl::createWithoutCopying(
reinterpret_cast<const UChar *>(untag(str.ptr)), str.len));
}
static const WTF::String toStringCopy(ZigString str) {
if (str.len == 0 || str.ptr == nullptr) { return WTF::String(); }
if (UNLIKELY(isTaggedUTF8Ptr(str.ptr))) { return WTF::String::fromUTF8(untag(str.ptr), str.len); }
return !isTaggedUTF16Ptr(str.ptr) ? WTF::String(WTF::StringImpl::create(untag(str.ptr), str.len))
: WTF::String(WTF::StringImpl::create(
reinterpret_cast<const UChar *>(untag(str.ptr)), str.len));
}
static WTF::String toStringNotConst(ZigString str) { return toString(str); }
static const JSC::JSString *toJSString(ZigString str, JSC::JSGlobalObject *global) {
return JSC::jsOwnedString(global->vm(), toString(str));
}
static const JSC::JSValue toJSStringValue(ZigString str, JSC::JSGlobalObject *global) {
return JSC::JSValue(toJSString(str, global));
}
static const JSC::JSString *toJSStringGC(ZigString str, JSC::JSGlobalObject *global) {
return JSC::jsString(global->vm(), toStringCopy(str));
}
static const JSC::JSValue toJSStringValueGC(ZigString str, JSC::JSGlobalObject *global) {
return JSC::JSValue(toJSString(str, global));
}
static const ZigString ZigStringEmpty = ZigString{nullptr, 0};
static const unsigned char __dot_char = '.';
static const ZigString ZigStringCwd = ZigString{&__dot_char, 1};
static const unsigned char *taggedUTF16Ptr(const UChar *ptr) {
return reinterpret_cast<const unsigned char *>(reinterpret_cast<uintptr_t>(ptr) |
(static_cast<uint64_t>(1) << 63));
}
static ZigString toZigString(WTF::String str) {
return str.isEmpty()
? ZigStringEmpty
: ZigString{str.is8Bit() ? str.characters8() : taggedUTF16Ptr(str.characters16()),
str.length()};
}
static ZigString toZigString(WTF::String *str) {
return str->isEmpty()
? ZigStringEmpty
: ZigString{str->is8Bit() ? str->characters8() : taggedUTF16Ptr(str->characters16()),
str->length()};
}
static ZigString toZigString(WTF::StringImpl &str) {
return str.isEmpty()
? ZigStringEmpty
: ZigString{str.is8Bit() ? str.characters8() : taggedUTF16Ptr(str.characters16()),
str.length()};
}
static ZigString toZigString(WTF::StringView &str) {
return str.isEmpty()
? ZigStringEmpty
: ZigString{str.is8Bit() ? str.characters8() : taggedUTF16Ptr(str.characters16()),
str.length()};
}
static ZigString toZigString(JSC::JSString &str, JSC::JSGlobalObject *global) {
return toZigString(str.value(global));
}
static ZigString toZigString(JSC::JSString *str, JSC::JSGlobalObject *global) {
return toZigString(str->value(global));
}
static ZigString toZigString(JSC::Identifier &str, JSC::JSGlobalObject *global) {
return toZigString(str.string());
}
static ZigString toZigString(JSC::Identifier *str, JSC::JSGlobalObject *global) {
return toZigString(str->string());
}
static WTF::StringView toStringView(ZigString str) {
return WTF::StringView(untag(str.ptr), str.len);
}
static void throwException(JSC::ThrowScope &scope, ZigErrorType err, JSC::JSGlobalObject *global) {
scope.throwException(global,
JSC::Exception::create(global->vm(), JSC::JSValue((JSC::JSCell *)err.ptr)));
}
static ZigString toZigString(JSC::JSValue val, JSC::JSGlobalObject *global) {
auto scope = DECLARE_THROW_SCOPE(global->vm());
WTF::String str = val.toWTFString(global);
if (scope.exception()) {
scope.clearException();
scope.release();
return ZigStringEmpty;
}
scope.release();
return toZigString(str);
}
static JSC::JSValue getErrorInstance(const ZigString *str, JSC__JSGlobalObject *globalObject) {
JSC::VM &vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSC::JSValue message = Zig::toJSString(*str, globalObject);
JSC::JSValue options = JSC::jsUndefined();
JSC::Structure *errorStructure = globalObject->errorStructure();
JSC::JSObject *result =
JSC::ErrorInstance::create(globalObject, errorStructure, message, options);
RETURN_IF_EXCEPTION(scope, JSC::JSValue());
scope.release();
return JSC::JSValue(result);
}
}; // namespace Zig
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