libbinder: Add support for Value, Map, and IpPrefix types
Change-Id: I4cd06c7c65f69e6b787111573b29c4ff22f57981
diff --git a/libs/binder/Value.cpp b/libs/binder/Value.cpp
new file mode 100644
index 0000000..fd1dfd5
--- /dev/null
+++ b/libs/binder/Value.cpp
@@ -0,0 +1,418 @@
+/*
+ * Copyright (C) 2015 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "Value"
+
+#include <binder/Value.h>
+
+#include <limits>
+
+#include <binder/IBinder.h>
+#include <binder/Parcel.h>
+#include <binder/Map.h>
+#include <private/binder/ParcelValTypes.h>
+#include <log/log.h>
+#include <utils/Errors.h>
+
+using android::BAD_TYPE;
+using android::BAD_VALUE;
+using android::NO_ERROR;
+using android::UNEXPECTED_NULL;
+using android::Parcel;
+using android::sp;
+using android::status_t;
+using std::map;
+using std::set;
+using std::vector;
+using android::binder::Value;
+using android::IBinder;
+using android::os::PersistableBundle;
+using namespace android::binder;
+
+// ====================================================================
+
+#define RETURN_IF_FAILED(calledOnce) \
+ do { \
+ status_t returnStatus = calledOnce; \
+ if (returnStatus) { \
+ ALOGE("Failed at %s:%d (%s)", __FILE__, __LINE__, __func__); \
+ return returnStatus; \
+ } \
+ } while(false)
+
+// ====================================================================
+
+/* These `internal_type_ptr()` functions allow this
+ * class to work without C++ RTTI support. This technique
+ * only works properly when called directly from this file,
+ * but that is OK because that is the only place we will
+ * be calling them from. */
+template<class T> const void* internal_type_ptr()
+{
+ static const T *marker;
+ return (void*)▮
+}
+
+/* Allows the type to be specified by the argument
+ * instead of inside angle brackets. */
+template<class T> const void* internal_type_ptr(const T&)
+{
+ return internal_type_ptr<T>();
+}
+
+// ====================================================================
+
+namespace android {
+
+namespace binder {
+
+class Value::ContentBase {
+public:
+ virtual ~ContentBase() = default;
+ virtual const void* type_ptr() const = 0;
+ virtual ContentBase * clone() const = 0;
+ virtual bool operator==(const ContentBase& rhs) const = 0;
+
+#ifdef LIBBINDER_VALUE_SUPPORTS_TYPE_INFO
+ virtual const std::type_info &type() const = 0;
+#endif
+
+ template<typename T> bool get(T* out) const;
+};
+
+/* This is the actual class that holds the value. */
+template<typename T> class Value::Content : public Value::ContentBase {
+public:
+ Content() = default;
+ Content(const T & value) : mValue(value) { }
+
+ virtual ~Content() = default;
+
+#ifdef LIBBINDER_VALUE_SUPPORTS_TYPE_INFO
+ virtual const std::type_info &type() const override
+ {
+ return typeid(T);
+ }
+#endif
+
+ virtual const void* type_ptr() const override
+ {
+ return internal_type_ptr<T>();
+ }
+
+ virtual ContentBase * clone() const override
+ {
+ return new Content(mValue);
+ };
+
+ virtual bool operator==(const ContentBase& rhs) const override
+ {
+ if (type_ptr() != rhs.type_ptr()) {
+ return false;
+ }
+ return mValue == static_cast<const Content<T>* >(&rhs)->mValue;
+ }
+
+ T mValue;
+};
+
+template<typename T> bool Value::ContentBase::get(T* out) const
+{
+ if (internal_type_ptr(*out) != type_ptr())
+ {
+ return false;
+ }
+
+ *out = static_cast<const Content<T>*>(this)->mValue;
+
+ return true;
+}
+
+// ====================================================================
+
+Value::Value() : mContent(NULL)
+{
+}
+
+Value::Value(const Value& value)
+ : mContent(value.mContent ? value.mContent->clone() : NULL)
+{
+}
+
+Value::~Value()
+{
+ delete mContent;
+}
+
+bool Value::operator==(const Value& rhs) const
+{
+ const Value& lhs(*this);
+
+ if (lhs.empty() && rhs.empty()) {
+ return true;
+ }
+
+ if ( (lhs.mContent == NULL)
+ || (rhs.mContent == NULL)
+ ) {
+ return false;
+ }
+
+ return *lhs.mContent == *rhs.mContent;
+}
+
+Value& Value::swap(Value &rhs)
+{
+ std::swap(mContent, rhs.mContent);
+ return *this;
+}
+
+Value& Value::operator=(const Value& rhs)
+{
+ delete mContent;
+ mContent = rhs.mContent
+ ? rhs.mContent->clone()
+ : NULL;
+ return *this;
+}
+
+bool Value::empty() const
+{
+ return mContent == NULL;
+}
+
+void Value::clear()
+{
+ delete mContent;
+ mContent = NULL;
+}
+
+int32_t Value::parcelType() const
+{
+ const void* t_info(mContent ? mContent->type_ptr() : NULL);
+
+ if (t_info == internal_type_ptr<bool>()) return VAL_BOOLEAN;
+ if (t_info == internal_type_ptr<uint8_t>()) return VAL_BYTE;
+ if (t_info == internal_type_ptr<int32_t>()) return VAL_INTEGER;
+ if (t_info == internal_type_ptr<int64_t>()) return VAL_LONG;
+ if (t_info == internal_type_ptr<double>()) return VAL_DOUBLE;
+ if (t_info == internal_type_ptr<String16>()) return VAL_STRING;
+
+ if (t_info == internal_type_ptr<vector<bool>>()) return VAL_BOOLEANARRAY;
+ if (t_info == internal_type_ptr<vector<uint8_t>>()) return VAL_BYTEARRAY;
+ if (t_info == internal_type_ptr<vector<int32_t>>()) return VAL_INTARRAY;
+ if (t_info == internal_type_ptr<vector<int64_t>>()) return VAL_LONGARRAY;
+ if (t_info == internal_type_ptr<vector<double>>()) return VAL_DOUBLEARRAY;
+ if (t_info == internal_type_ptr<vector<String16>>()) return VAL_STRINGARRAY;
+
+ if (t_info == internal_type_ptr<Map>()) return VAL_MAP;
+ if (t_info == internal_type_ptr<PersistableBundle>()) return VAL_PERSISTABLEBUNDLE;
+
+ return VAL_NULL;
+}
+
+#ifdef LIBBINDER_VALUE_SUPPORTS_TYPE_INFO
+const std::type_info& Value::type() const
+{
+ return mContent != NULL
+ ? mContent->type()
+ : typeid(void);
+}
+#endif // ifdef LIBBINDER_VALUE_SUPPORTS_TYPE_INFO
+
+#define DEF_TYPE_ACCESSORS(T, TYPENAME) \
+ bool Value::is ## TYPENAME() const \
+ { \
+ return mContent \
+ ? internal_type_ptr<T>() == mContent->type_ptr() \
+ : false; \
+ } \
+ bool Value::get ## TYPENAME(T* out) const \
+ { \
+ return mContent \
+ ? mContent->get(out) \
+ : false; \
+ } \
+ void Value::put ## TYPENAME(const T& in) \
+ { \
+ *this = in; \
+ } \
+ Value& Value::operator=(const T& rhs) \
+ { \
+ delete mContent; \
+ mContent = new Content< T >(rhs); \
+ return *this; \
+ } \
+ Value::Value(const T& value) \
+ : mContent(new Content< T >(value)) \
+ { }
+
+DEF_TYPE_ACCESSORS(bool, Boolean)
+DEF_TYPE_ACCESSORS(int8_t, Byte)
+DEF_TYPE_ACCESSORS(int32_t, Int)
+DEF_TYPE_ACCESSORS(int64_t, Long)
+DEF_TYPE_ACCESSORS(double, Double)
+DEF_TYPE_ACCESSORS(String16, String)
+
+DEF_TYPE_ACCESSORS(std::vector<bool>, BooleanVector)
+DEF_TYPE_ACCESSORS(std::vector<uint8_t>, ByteVector)
+DEF_TYPE_ACCESSORS(std::vector<int32_t>, IntVector)
+DEF_TYPE_ACCESSORS(std::vector<int64_t>, LongVector)
+DEF_TYPE_ACCESSORS(std::vector<double>, DoubleVector)
+DEF_TYPE_ACCESSORS(std::vector<String16>, StringVector)
+
+DEF_TYPE_ACCESSORS(::android::binder::Map, Map)
+DEF_TYPE_ACCESSORS(PersistableBundle, PersistableBundle)
+
+bool Value::getString(String8* out) const
+{
+ String16 val;
+ bool ret = getString(&val);
+ if (ret) {
+ *out = String8(val);
+ }
+ return ret;
+}
+
+bool Value::getString(::std::string* out) const
+{
+ String8 val;
+ bool ret = getString(&val);
+ if (ret) {
+ *out = val.string();
+ }
+ return ret;
+}
+
+status_t Value::writeToParcel(Parcel* parcel) const
+{
+ // This implementation needs to be kept in sync with the writeValue
+ // implementation in frameworks/base/core/java/android/os/Parcel.java
+
+#define BEGIN_HANDLE_WRITE() \
+ do { \
+ const void* t_info(mContent?mContent->type_ptr():NULL); \
+ if (false) { }
+#define HANDLE_WRITE_TYPE(T, TYPEVAL, TYPEMETHOD) \
+ else if (t_info == internal_type_ptr<T>()) { \
+ RETURN_IF_FAILED(parcel->writeInt32(TYPEVAL)); \
+ RETURN_IF_FAILED(parcel->TYPEMETHOD(static_cast<const Content<T>*>(mContent)->mValue)); \
+ }
+#define HANDLE_WRITE_PARCELABLE(T, TYPEVAL) \
+ else if (t_info == internal_type_ptr<T>()) { \
+ RETURN_IF_FAILED(parcel->writeInt32(TYPEVAL)); \
+ RETURN_IF_FAILED(static_cast<const Content<T>*>(mContent)->mValue.writeToParcel(parcel)); \
+ }
+#define END_HANDLE_WRITE() \
+ else { \
+ ALOGE("writeToParcel: Type not supported"); \
+ return BAD_TYPE; \
+ } \
+ } while (false);
+
+ BEGIN_HANDLE_WRITE()
+
+ HANDLE_WRITE_TYPE(bool, VAL_BOOLEAN, writeBool)
+ HANDLE_WRITE_TYPE(int8_t, VAL_BYTE, writeByte)
+ HANDLE_WRITE_TYPE(int8_t, VAL_BYTE, writeByte)
+ HANDLE_WRITE_TYPE(int32_t, VAL_INTEGER, writeInt32)
+ HANDLE_WRITE_TYPE(int64_t, VAL_LONG, writeInt64)
+ HANDLE_WRITE_TYPE(double, VAL_DOUBLE, writeDouble)
+ HANDLE_WRITE_TYPE(String16, VAL_STRING, writeString16)
+
+ HANDLE_WRITE_TYPE(vector<bool>, VAL_BOOLEANARRAY, writeBoolVector)
+ HANDLE_WRITE_TYPE(vector<uint8_t>, VAL_BYTEARRAY, writeByteVector)
+ HANDLE_WRITE_TYPE(vector<int8_t>, VAL_BYTEARRAY, writeByteVector)
+ HANDLE_WRITE_TYPE(vector<int32_t>, VAL_INTARRAY, writeInt32Vector)
+ HANDLE_WRITE_TYPE(vector<int64_t>, VAL_LONGARRAY, writeInt64Vector)
+ HANDLE_WRITE_TYPE(vector<double>, VAL_DOUBLEARRAY, writeDoubleVector)
+ HANDLE_WRITE_TYPE(vector<String16>, VAL_STRINGARRAY, writeString16Vector)
+
+ HANDLE_WRITE_PARCELABLE(PersistableBundle, VAL_PERSISTABLEBUNDLE)
+
+ END_HANDLE_WRITE()
+
+ return NO_ERROR;
+
+#undef BEGIN_HANDLE_WRITE
+#undef HANDLE_WRITE_TYPE
+#undef HANDLE_WRITE_PARCELABLE
+#undef END_HANDLE_WRITE
+}
+
+status_t Value::readFromParcel(const Parcel* parcel)
+{
+ // This implementation needs to be kept in sync with the readValue
+ // implementation in frameworks/base/core/java/android/os/Parcel.javai
+
+#define BEGIN_HANDLE_READ() \
+ switch(value_type) { \
+ default: \
+ ALOGE("readFromParcel: Parcel type %d is not supported", value_type); \
+ return BAD_TYPE;
+#define HANDLE_READ_TYPE(T, TYPEVAL, TYPEMETHOD) \
+ case TYPEVAL: \
+ mContent = new Content<T>(); \
+ RETURN_IF_FAILED(parcel->TYPEMETHOD(&static_cast<Content<T>*>(mContent)->mValue)); \
+ break;
+#define HANDLE_READ_PARCELABLE(T, TYPEVAL) \
+ case TYPEVAL: \
+ mContent = new Content<T>(); \
+ RETURN_IF_FAILED(static_cast<Content<T>*>(mContent)->mValue.readFromParcel(parcel)); \
+ break;
+#define END_HANDLE_READ() \
+ }
+
+ int32_t value_type = VAL_NULL;
+
+ delete mContent;
+ mContent = NULL;
+
+ RETURN_IF_FAILED(parcel->readInt32(&value_type));
+
+ BEGIN_HANDLE_READ()
+
+ HANDLE_READ_TYPE(bool, VAL_BOOLEAN, readBool)
+ HANDLE_READ_TYPE(int8_t, VAL_BYTE, readByte)
+ HANDLE_READ_TYPE(int32_t, VAL_INTEGER, readInt32)
+ HANDLE_READ_TYPE(int64_t, VAL_LONG, readInt64)
+ HANDLE_READ_TYPE(double, VAL_DOUBLE, readDouble)
+ HANDLE_READ_TYPE(String16, VAL_STRING, readString16)
+
+ HANDLE_READ_TYPE(vector<bool>, VAL_BOOLEANARRAY, readBoolVector)
+ HANDLE_READ_TYPE(vector<uint8_t>, VAL_BYTEARRAY, readByteVector)
+ HANDLE_READ_TYPE(vector<int32_t>, VAL_INTARRAY, readInt32Vector)
+ HANDLE_READ_TYPE(vector<int64_t>, VAL_LONGARRAY, readInt64Vector)
+ HANDLE_READ_TYPE(vector<double>, VAL_DOUBLEARRAY, readDoubleVector)
+ HANDLE_READ_TYPE(vector<String16>, VAL_STRINGARRAY, readString16Vector)
+
+ HANDLE_READ_PARCELABLE(PersistableBundle, VAL_PERSISTABLEBUNDLE)
+
+ END_HANDLE_READ()
+
+ return NO_ERROR;
+
+#undef BEGIN_HANDLE_READ
+#undef HANDLE_READ_TYPE
+#undef HANDLE_READ_PARCELABLE
+#undef END_HANDLE_READ
+}
+
+} // namespace binder
+
+} // namespace android
+
+/* vim: set ts=4 sw=4 tw=0 et :*/