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 "native_util.h"
24 #include "nativehelper/jni_macros.h"
25 #include "nativehelper/ScopedLocalRef.h"
26 #include "nativehelper/ScopedPrimitiveArray.h"
27 #include "scoped_fast_native_object_access-inl.h"
28 #include "scoped_thread_state_change-inl.h"
29
30 namespace art {
31
StringFactory_newStringFromBytes(JNIEnv * env,jclass,jbyteArray java_data,jint high,jint offset,jint byte_count)32 static jstring StringFactory_newStringFromBytes(JNIEnv* env, jclass, jbyteArray java_data,
33 jint high, jint offset, jint byte_count) {
34 ScopedFastNativeObjectAccess soa(env);
35 if (UNLIKELY(java_data == nullptr)) {
36 ThrowNullPointerException("data == null");
37 return nullptr;
38 }
39 StackHandleScope<1> hs(soa.Self());
40 Handle<mirror::ByteArray> byte_array(hs.NewHandle(soa.Decode<mirror::ByteArray>(java_data)));
41 int32_t data_size = byte_array->GetLength();
42 if ((offset | byte_count) < 0 || byte_count > data_size - offset) {
43 soa.Self()->ThrowNewExceptionF("Ljava/lang/StringIndexOutOfBoundsException;",
44 "length=%d; regionStart=%d; regionLength=%d", data_size,
45 offset, byte_count);
46 return nullptr;
47 }
48 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
49 ObjPtr<mirror::String> result = mirror::String::AllocFromByteArray<true>(soa.Self(),
50 byte_count,
51 byte_array,
52 offset,
53 high,
54 allocator_type);
55 return soa.AddLocalReference<jstring>(result);
56 }
57
58 // 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)59 static jstring StringFactory_newStringFromChars(JNIEnv* env, jclass, jint offset,
60 jint char_count, jcharArray java_data) {
61 DCHECK(java_data != nullptr);
62 ScopedFastNativeObjectAccess soa(env);
63 StackHandleScope<1> hs(soa.Self());
64 Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray>(java_data)));
65 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
66 ObjPtr<mirror::String> result = mirror::String::AllocFromCharArray<true>(soa.Self(),
67 char_count,
68 char_array,
69 offset,
70 allocator_type);
71 return soa.AddLocalReference<jstring>(result);
72 }
73
StringFactory_newStringFromString(JNIEnv * env,jclass,jstring to_copy)74 static jstring StringFactory_newStringFromString(JNIEnv* env, jclass, jstring to_copy) {
75 ScopedFastNativeObjectAccess soa(env);
76 if (UNLIKELY(to_copy == nullptr)) {
77 ThrowNullPointerException("toCopy == null");
78 return nullptr;
79 }
80 StackHandleScope<1> hs(soa.Self());
81 Handle<mirror::String> string(hs.NewHandle(soa.Decode<mirror::String>(to_copy)));
82 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
83 ObjPtr<mirror::String> result = mirror::String::AllocFromString<true>(soa.Self(),
84 string->GetLength(),
85 string,
86 0,
87 allocator_type);
88 return soa.AddLocalReference<jstring>(result);
89 }
90
91 static JNINativeMethod gMethods[] = {
92 FAST_NATIVE_METHOD(StringFactory, newStringFromBytes, "([BIII)Ljava/lang/String;"),
93 FAST_NATIVE_METHOD(StringFactory, newStringFromChars, "(II[C)Ljava/lang/String;"),
94 FAST_NATIVE_METHOD(StringFactory, newStringFromString, "(Ljava/lang/String;)Ljava/lang/String;"),
95 };
96
register_java_lang_StringFactory(JNIEnv * env)97 void register_java_lang_StringFactory(JNIEnv* env) {
98 REGISTER_NATIVE_METHODS("java/lang/StringFactory");
99 }
100
101 } // namespace art
102