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 "handle_scope-inl.h"
21 #include "jni/jni_internal.h"
22 #include "mirror/object-inl.h"
23 #include "mirror/string-alloc-inl.h"
24 #include "native_util.h"
25 #include "nativehelper/jni_macros.h"
26 #include "nativehelper/scoped_local_ref.h"
27 #include "nativehelper/scoped_primitive_array.h"
28 #include "scoped_fast_native_object_access-inl.h"
29 #include "scoped_thread_state_change-inl.h"
30
31 namespace art {
32
StringFactory_newStringFromBytes(JNIEnv * env,jclass,jbyteArray java_data,jint high,jint offset,jint byte_count)33 static jstring StringFactory_newStringFromBytes(JNIEnv* env, jclass, jbyteArray java_data,
34 jint high, jint offset, jint byte_count) {
35 ScopedFastNativeObjectAccess soa(env);
36 if (UNLIKELY(java_data == nullptr)) {
37 ThrowNullPointerException("data == null");
38 return nullptr;
39 }
40 StackHandleScope<1> hs(soa.Self());
41 Handle<mirror::ByteArray> byte_array(hs.NewHandle(soa.Decode<mirror::ByteArray>(java_data)));
42 int32_t data_size = byte_array->GetLength();
43 if ((offset | byte_count) < 0 || byte_count > data_size - offset) {
44 soa.Self()->ThrowNewExceptionF("Ljava/lang/StringIndexOutOfBoundsException;",
45 "length=%d; regionStart=%d; regionLength=%d", data_size,
46 offset, byte_count);
47 return nullptr;
48 }
49 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
50 ObjPtr<mirror::String> result = mirror::String::AllocFromByteArray(soa.Self(),
51 byte_count,
52 byte_array,
53 offset,
54 high,
55 allocator_type);
56 return soa.AddLocalReference<jstring>(result);
57 }
58
59 // 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)60 static jstring StringFactory_newStringFromChars(JNIEnv* env, jclass, jint offset,
61 jint char_count, jcharArray java_data) {
62 DCHECK(java_data != nullptr);
63 ScopedFastNativeObjectAccess soa(env);
64 StackHandleScope<1> hs(soa.Self());
65 Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray>(java_data)));
66 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
67 ObjPtr<mirror::String> result = mirror::String::AllocFromCharArray(soa.Self(),
68 char_count,
69 char_array,
70 offset,
71 allocator_type);
72 return soa.AddLocalReference<jstring>(result);
73 }
74
StringFactory_newStringFromString(JNIEnv * env,jclass,jstring to_copy)75 static jstring StringFactory_newStringFromString(JNIEnv* env, jclass, jstring to_copy) {
76 ScopedFastNativeObjectAccess soa(env);
77 if (UNLIKELY(to_copy == nullptr)) {
78 ThrowNullPointerException("toCopy == null");
79 return nullptr;
80 }
81 StackHandleScope<1> hs(soa.Self());
82 Handle<mirror::String> string(hs.NewHandle(soa.Decode<mirror::String>(to_copy)));
83 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
84 ObjPtr<mirror::String> result = mirror::String::AllocFromString(soa.Self(),
85 string->GetLength(),
86 string,
87 /*offset=*/ 0,
88 allocator_type);
89 return soa.AddLocalReference<jstring>(result);
90 }
91
92 static JNINativeMethod gMethods[] = {
93 FAST_NATIVE_METHOD(StringFactory, newStringFromBytes, "([BIII)Ljava/lang/String;"),
94 FAST_NATIVE_METHOD(StringFactory, newStringFromChars, "(II[C)Ljava/lang/String;"),
95 FAST_NATIVE_METHOD(StringFactory, newStringFromString, "(Ljava/lang/String;)Ljava/lang/String;"),
96 };
97
register_java_lang_StringFactory(JNIEnv * env)98 void register_java_lang_StringFactory(JNIEnv* env) {
99 REGISTER_NATIVE_METHODS("java/lang/StringFactory");
100 }
101
102 } // namespace art
103