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Diffstat (limited to 'widget/android/jni/TypeAdapter.h')
| -rw-r--r-- | widget/android/jni/TypeAdapter.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/widget/android/jni/TypeAdapter.h b/widget/android/jni/TypeAdapter.h new file mode 100644 index 0000000000..5ab1e14bf5 --- /dev/null +++ b/widget/android/jni/TypeAdapter.h @@ -0,0 +1,71 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#ifndef mozilla_jni_TypeAdapter_h__ +#define mozilla_jni_TypeAdapter_h__ + +#include <jni.h> + +#include "mozilla/jni/Refs.h" + +namespace mozilla { +namespace jni { +namespace detail { + +// TypeAdapter specializations are the interfaces between native/C++ types such +// as int32_t and JNI types such as jint. The template parameter T is the native +// type, and each TypeAdapter specialization can have the following members: +// +// * Call: JNIEnv member pointer for making a method call that returns T. +// * StaticCall: JNIEnv member pointer for making a static call that returns T. +// * Get: JNIEnv member pointer for getting a field of type T. +// * StaticGet: JNIEnv member pointer for getting a static field of type T. +// * Set: JNIEnv member pointer for setting a field of type T. +// * StaticGet: JNIEnv member pointer for setting a static field of type T. +// * ToNative: static function that converts the JNI type to the native type. +// * FromNative: static function that converts the native type to the JNI type. + +template <typename T> +struct TypeAdapter; + +#define DEFINE_PRIMITIVE_TYPE_ADAPTER(NativeType, JNIType, JNIName) \ + \ + template <> \ + struct TypeAdapter<NativeType> { \ + using JNI##Type = JNIType; \ + \ + static constexpr auto Call = &JNIEnv::Call##JNIName##MethodA; \ + static constexpr auto StaticCall = &JNIEnv::CallStatic##JNIName##MethodA; \ + static constexpr auto Get = &JNIEnv::Get##JNIName##Field; \ + static constexpr auto StaticGet = &JNIEnv::GetStatic##JNIName##Field; \ + static constexpr auto Set = &JNIEnv::Set##JNIName##Field; \ + static constexpr auto StaticSet = &JNIEnv::SetStatic##JNIName##Field; \ + static constexpr auto GetArray = &JNIEnv::Get##JNIName##ArrayRegion; \ + static constexpr auto SetArray = &JNIEnv::Set##JNIName##ArrayRegion; \ + static constexpr auto NewArray = &JNIEnv::New##JNIName##Array; \ + \ + static JNIType FromNative(JNIEnv*, NativeType val) { \ + return static_cast<JNIType>(val); \ + } \ + static NativeType ToNative(JNIEnv*, JNIType val) { \ + return static_cast<NativeType>(val); \ + } \ + } + +DEFINE_PRIMITIVE_TYPE_ADAPTER(bool, jboolean, Boolean); +DEFINE_PRIMITIVE_TYPE_ADAPTER(int8_t, jbyte, Byte); +DEFINE_PRIMITIVE_TYPE_ADAPTER(char16_t, jchar, Char); +DEFINE_PRIMITIVE_TYPE_ADAPTER(int16_t, jshort, Short); +DEFINE_PRIMITIVE_TYPE_ADAPTER(int32_t, jint, Int); +DEFINE_PRIMITIVE_TYPE_ADAPTER(int64_t, jlong, Long); +DEFINE_PRIMITIVE_TYPE_ADAPTER(float, jfloat, Float); +DEFINE_PRIMITIVE_TYPE_ADAPTER(double, jdouble, Double); + +#undef DEFINE_PRIMITIVE_TYPE_ADAPTER + +} // namespace detail +} // namespace jni +} // namespace mozilla + +#endif // mozilla_jni_Types_h__ |