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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 "common_throws.h"
18 #include "jni_internal.h"
19 #include "mirror/string-inl.h"
20 #include "scoped_fast_native_object_access.h"
21 #include "scoped_thread_state_change.h"
22 #include "ScopedLocalRef.h"
23 #include "verify_object-inl.h"
24 
25 namespace art {
26 
String_compareTo(JNIEnv * env,jobject javaThis,jobject javaRhs)27 static jint String_compareTo(JNIEnv* env, jobject javaThis, jobject javaRhs) {
28   ScopedFastNativeObjectAccess soa(env);
29   if (UNLIKELY(javaRhs == NULL)) {
30     ThrowNullPointerException(NULL, "rhs == null");
31     return -1;
32   } else {
33     return soa.Decode<mirror::String*>(javaThis)->CompareTo(soa.Decode<mirror::String*>(javaRhs));
34   }
35 }
36 
String_fastIndexOf(JNIEnv * env,jobject java_this,jint ch,jint start)37 static jint String_fastIndexOf(JNIEnv* env, jobject java_this, jint ch, jint start) {
38   ScopedFastNativeObjectAccess soa(env);
39   // This method does not handle supplementary characters. They're dealt with in managed code.
40   DCHECK_LE(ch, 0xffff);
41 
42   mirror::String* s = soa.Decode<mirror::String*>(java_this);
43   return s->FastIndexOf(ch, start);
44 }
45 
String_intern(JNIEnv * env,jobject javaThis)46 static jstring String_intern(JNIEnv* env, jobject javaThis) {
47   ScopedFastNativeObjectAccess soa(env);
48   mirror::String* s = soa.Decode<mirror::String*>(javaThis);
49   mirror::String* result = s->Intern();
50   return soa.AddLocalReference<jstring>(result);
51 }
52 
53 static JNINativeMethod gMethods[] = {
54   NATIVE_METHOD(String, compareTo, "!(Ljava/lang/String;)I"),
55   NATIVE_METHOD(String, fastIndexOf, "!(II)I"),
56   NATIVE_METHOD(String, intern, "!()Ljava/lang/String;"),
57 };
58 
register_java_lang_String(JNIEnv * env)59 void register_java_lang_String(JNIEnv* env) {
60   REGISTER_NATIVE_METHODS("java/lang/String");
61 }
62 
63 }  // namespace art
64