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VariantController.h
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VariantController.h
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/*
+----------------------------------------------------------------------+
| HipHop for PHP |
+----------------------------------------------------------------------+
| Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com) |
| Copyright (c) 1997-2010 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
*/
#ifndef VARIANTCONTROLLER_H
#define VARIANTCONTROLLER_H
#include <algorithm>
#include "hphp/runtime/base/array-init.h"
#include "hphp/runtime/base/array-iterator.h"
#include "hphp/runtime/ext/extension.h"
#include "hphp/runtime/ext/fb/FBSerialize/FBSerialize.h"
namespace HPHP {
enum VariantControllerHackArraysMode {
OFF,
ON,
};
/**
* Hphp datatype conforming to datatype requirements in FBSerialize.h
*/
template <VariantControllerHackArraysMode HackArraysMode>
struct VariantControllerImpl {
typedef Variant VariantType;
typedef Array MapType;
typedef Array VectorType;
typedef String StringType;
// variant accessors
static HPHP::serialize::Type type(const VariantType& obj) {
switch (obj.getType()) {
case KindOfUninit:
case KindOfNull: return HPHP::serialize::Type::NULLT;
case KindOfBoolean: return HPHP::serialize::Type::BOOL;
case KindOfDouble: return HPHP::serialize::Type::DOUBLE;
case KindOfInt64: return HPHP::serialize::Type::INT64;
case KindOfPersistentString:
case KindOfString: return HPHP::serialize::Type::STRING;
case KindOfObject: return HPHP::serialize::Type::OBJECT;
case KindOfPersistentArray:
case KindOfArray: return HPHP::serialize::Type::MAP;
case KindOfPersistentDict:
case KindOfDict: {
if (HackArraysMode == VariantControllerHackArraysMode::ON) {
return HPHP::serialize::Type::MAP;
}
throw HPHP::serialize::HackArraySerializeError{};
}
case KindOfPersistentVec:
case KindOfVec: {
if (HackArraysMode == VariantControllerHackArraysMode::ON) {
return HPHP::serialize::Type::LIST;
}
throw HPHP::serialize::HackArraySerializeError{};
}
case KindOfPersistentKeyset:
case KindOfKeyset:
throw HPHP::serialize::KeysetSerializeError{};
case KindOfResource:
case KindOfRef:
throw HPHP::serialize::SerializeError(
"don't know how to serialize HPHP Variant");
}
not_reached();
}
static int64_t asInt64(const VariantType& obj) { return obj.toInt64(); }
static bool asBool(const VariantType& obj) { return obj.toInt64() != 0; }
static double asDouble(const VariantType& obj) { return obj.toDouble(); }
static const String& asString(const VariantType& obj) {
return obj.toCStrRef();
}
static const Array& asMap(const VariantType& obj) { return obj.toCArrRef(); }
static const Array& asVector(const VariantType& obj) { return obj.toCArrRef(); }
// variant creators
static VariantType createNull() { return init_null(); }
static VariantType fromInt64(int64_t val) { return val; }
static VariantType fromBool(bool val) { return val; }
static VariantType fromDouble(double val) { return val; }
static VariantType fromString(const StringType& str) { return str; }
static VariantType fromMap(const MapType& map) { return map; }
static VariantType fromVector(const VectorType& vec) { return vec; }
// map methods
static MapType createMap() {
return HackArraysMode == VariantControllerHackArraysMode::ON
? empty_dict_array() : empty_array();
}
static MapType createMap(ArrayInit&& map) {
return map.toArray();
}
static ArrayInit reserveMap(size_t n) {
ArrayInit res(n, ArrayInit::Map{}, CheckAllocation{});
return res;
}
static MapType getStaticEmptyMap() {
return MapType(staticEmptyArray());
}
static HPHP::serialize::Type mapKeyType(const Variant& k) {
return type(k);
}
static int64_t mapKeyAsInt64(const Variant& k) { return k.toInt64(); }
static String mapKeyAsString(const Variant& k) {
return k.toString();
}
template <typename Key>
static void mapSet(MapType& map, Key&& k, VariantType&& v) {
map.set(std::move(k), std::move(v));
}
template <typename Key>
static void mapSet(ArrayInit& map, Key&& k, VariantType&& v) {
map.set(std::move(k), std::move(v));
}
static int64_t mapSize(const MapType& map) { return map.size(); }
static ArrayIter mapIterator(const MapType& map) {
return ArrayIter(map);
}
static bool mapNotEnd(const MapType& map, ArrayIter& it) {
return !it.end();
}
static void mapNext(ArrayIter& it) { ++it; }
static Variant mapKey(ArrayIter& it) { return it.first(); }
static const VariantType& mapValue(ArrayIter& it) { return it.secondRef(); }
// vector methods
static VectorType createVector() {
return HackArraysMode == VariantControllerHackArraysMode::ON
? empty_vec_array() : empty_array();
}
static int64_t vectorSize(const VectorType& vec) {
return vec.size();
}
static void vectorAppend(VectorType& vec, const VariantType& v) {
vec.append(v);
}
static ArrayIter vectorIterator(const VectorType& vec) {
return ArrayIter(vec);
}
static bool vectorNotEnd(const VectorType& vec, ArrayIter& it) {
return !it.end();
}
static void vectorNext(ArrayIter& it) { ++it; }
static const VariantType& vectorValue(ArrayIter& it) {
return it.secondRef();
}
// string methods
static StringType createMutableString(size_t n) {
String ret(n, ReserveString);
ret.setSize(n);
return ret;
}
static StringType createStaticString(const char* str, size_t len) {
String ret = String(makeStaticString(str, len));
return ret;
}
static StringType getStaticEmptyString() {
return empty_string();
}
static char* getMutablePtr(StringType& s) {
return s.mutableData();
}
static void shrinkString(String& s, size_t length) {
s.shrink(length);
}
static StringType stringFromData(const char* src, int n) {
return StringType::attach(StringData::Make(src, n, CopyString));
}
static StringType stringFromMutableString(StringType&& s) {
return std::move(s);
}
static size_t stringLen(const StringType& str) { return str.size(); }
static const char* stringData(const StringType& str) {
return str.data();
}
};
using VariantController =
VariantControllerImpl<VariantControllerHackArraysMode::OFF>;
using VariantControllerUsingHackArrays =
VariantControllerImpl<VariantControllerHackArraysMode::ON>;
}
#endif