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#include "stdafx.h"
#include "Variant.h"
#include "Runtime.h"
#include "Handle.h"
#include "StrBuf.h"
namespace storm {
Variant::Variant() : data(null) {}
Variant::Variant(const Variant &o) : data(null) {
if (!o.data)
return;
const GcType *t = runtime::gcTypeOf(o.data);
if (t->kind == GcType::tArray) {
// Value.
GcArray<Byte> *alloc = (GcArray<Byte> *)o.data;
init(alloc->v, t->type);
} else {
// Class.
data = o.data;
}
}
Variant &Variant::operator =(const Variant &o) {
Variant t(o);
std::swap(t.data, data);
return *this;
}
Variant::Variant(RootObject *o) : data(o) {}
Variant::Variant(Object *o) : data(o) {}
Variant::Variant(TObject *o) : data(o) {}
Variant::Variant(const void *value, Type *type) {
init(value, type);
}
void Variant::init(const void *value, Type *type) {
const Handle &h = runtime::typeHandle(type);
data = runtime::allocArray(h.engine(), h.gcArrayType, 1);
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
h.safeCopy(alloc->v, value);
alloc->filled = 1;
}
Variant::~Variant() {
if (!data)
return;
const GcType *t = runtime::gcTypeOf(data);
if (t->kind != GcType::tArray)
return;
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
if (!alloc->filled)
return; // Not initialized.
const Handle &h = runtime::typeHandle(t->type);
h.safeDestroy(alloc->v);
alloc->filled = 0;
}
void Variant::deepCopy(CloneEnv *env) {
if (!data)
return;
const GcType *t = runtime::gcTypeOf(data);
if (t->kind == GcType::tArray) {
// Value.
const Handle &h = runtime::typeHandle(t->type);
if (!h.deepCopyFn)
return;
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
(*h.deepCopyFn)(alloc->v, env);
} else {
// Class.
data = runtime::cloneObjectEnv((RootObject *)data, env);
}
}
Bool Variant::empty() const {
if (!data)
return true;
const GcType *t = runtime::gcTypeOf(data);
if (t->kind == GcType::tArray) {
// We have data, but is it initialized?
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
return alloc->filled == 0;
} else {
return false;
}
}
Bool Variant::has(Type *type) const {
if (!data)
return false;
const GcType *t = runtime::gcTypeOf(data);
return runtime::isA(type, t->type);
}
MAYBE(Type *) Variant::type() const {
if (!data)
return null;
const GcType *t = runtime::gcTypeOf(data);
return t->type;
}
void *Variant::getValue() const {
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
return alloc->v;
}
Variant Variant::uninitializedValue(Type *type) {
assert(runtime::isValue(type));
Variant v;
const Handle &h = runtime::typeHandle(type);
v.data = runtime::allocArray(h.engine(), h.gcArrayType, 1);
return v;
}
void Variant::valueInitialized() {
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
alloc->filled = 1;
}
void Variant::valueRemoved() {
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
alloc->filled = 0;
}
void Variant::moveValue(void *to) {
const GcType *t = runtime::gcTypeOf(data);
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
memcpy(to, alloc->v, t->stride);
memset(alloc->v, 0, t->stride);
valueRemoved();
}
RootObject *Variant::getObject() const {
return (RootObject *)data;
}
void *Variant::getPointer() {
if (!data)
return null;
const GcType *t = runtime::gcTypeOf(data);
if (t->kind == GcType::tArray) {
return getValue();
} else {
return &data;
}
}
Engine &Variant::engine() const {
const GcType *t = runtime::gcTypeOf(data);
return runtime::allocEngine((RootObject *)t->type);
}
void Variant::toS(StrBuf *to) const {
if (empty()) {
*to << S("<empty>");
return;
}
const GcType *t = runtime::gcTypeOf(data);
const Handle &h = runtime::typeHandle(t->type);
if (t->kind == GcType::tArray) {
GcArray<Byte> *alloc = (GcArray<Byte> *)data;
(*h.toSFn)(alloc->v, to);
} else {
(*h.toSFn)(&data, to);
}
}
wostream &operator <<(wostream &to, const Variant &v) {
if (v.empty())
return to << L"<empty>";
StrBuf *b = new (v.engine()) StrBuf();
*b << v;
return to << ::toS(b);
}
}
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