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
StringFactory_newStringFromBytes(JNIEnv * env,jclass,jbyteArray java_data,jint high,jint offset,jint byte_count)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.
StringFactory_newStringFromChars(JNIEnv * env,jclass,jint offset,jint char_count,jcharArray java_data)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
StringFactory_newStringFromString(JNIEnv * env,jclass,jstring to_copy)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
register_java_lang_StringFactory(JNIEnv * env)87 void register_java_lang_StringFactory(JNIEnv* env) {
88 REGISTER_NATIVE_METHODS("java/lang/StringFactory");
89 }
90
91 } // namespace art
92