1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "java_lang_StringFactory.h" 18 19 #include "common_throws.h" 20 #include "jni_internal.h" 21 #include "mirror/object-inl.h" 22 #include "mirror/string.h" 23 #include "scoped_fast_native_object_access.h" 24 #include "scoped_thread_state_change.h" 25 #include "ScopedLocalRef.h" 26 #include "ScopedPrimitiveArray.h" 27 28 namespace art { 29 30 static jstring StringFactory_newStringFromBytes(JNIEnv* env, jclass, jbyteArray java_data, 31 jint high, jint offset, jint byte_count) { 32 ScopedFastNativeObjectAccess soa(env); 33 if (UNLIKELY(java_data == nullptr)) { 34 ThrowNullPointerException("data == null"); 35 return nullptr; 36 } 37 StackHandleScope<1> hs(soa.Self()); 38 Handle<mirror::ByteArray> byte_array(hs.NewHandle(soa.Decode<mirror::ByteArray*>(java_data))); 39 int32_t data_size = byte_array->GetLength(); 40 if ((offset | byte_count) < 0 || byte_count > data_size - offset) { 41 soa.Self()->ThrowNewExceptionF("Ljava/lang/StringIndexOutOfBoundsException;", 42 "length=%d; regionStart=%d; regionLength=%d", data_size, 43 offset, byte_count); 44 return nullptr; 45 } 46 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator(); 47 mirror::String* result = mirror::String::AllocFromByteArray<true>(soa.Self(), byte_count, 48 byte_array, offset, high, 49 allocator_type); 50 return soa.AddLocalReference<jstring>(result); 51 } 52 53 // The char array passed as `java_data` must not be a null reference. 54 static jstring StringFactory_newStringFromChars(JNIEnv* env, jclass, jint offset, 55 jint char_count, jcharArray java_data) { 56 DCHECK(java_data != nullptr); 57 ScopedFastNativeObjectAccess soa(env); 58 StackHandleScope<1> hs(soa.Self()); 59 Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray*>(java_data))); 60 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator(); 61 mirror::String* result = mirror::String::AllocFromCharArray<true>(soa.Self(), char_count, 62 char_array, offset, 63 allocator_type); 64 return soa.AddLocalReference<jstring>(result); 65 } 66 67 static jstring StringFactory_newStringFromString(JNIEnv* env, jclass, jstring to_copy) { 68 ScopedFastNativeObjectAccess soa(env); 69 if (UNLIKELY(to_copy == nullptr)) { 70 ThrowNullPointerException("toCopy == null"); 71 return nullptr; 72 } 73 StackHandleScope<1> hs(soa.Self()); 74 Handle<mirror::String> string(hs.NewHandle(soa.Decode<mirror::String*>(to_copy))); 75 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator(); 76 mirror::String* result = mirror::String::AllocFromString<true>(soa.Self(), string->GetLength(), 77 string, 0, allocator_type); 78 return soa.AddLocalReference<jstring>(result); 79 } 80 81 static JNINativeMethod gMethods[] = { 82 NATIVE_METHOD(StringFactory, newStringFromBytes, "!([BIII)Ljava/lang/String;"), 83 NATIVE_METHOD(StringFactory, newStringFromChars, "!(II[C)Ljava/lang/String;"), 84 NATIVE_METHOD(StringFactory, newStringFromString, "!(Ljava/lang/String;)Ljava/lang/String;"), 85 }; 86 87 void register_java_lang_StringFactory(JNIEnv* env) { 88 REGISTER_NATIVE_METHODS("java/lang/StringFactory"); 89 } 90 91 } // namespace art 92
