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_String.h" 18 19#include "common_throws.h" 20#include "jni_internal.h" 21#include "mirror/array.h" 22#include "mirror/object-inl.h" 23#include "mirror/string.h" 24#include "mirror/string-inl.h" 25#include "scoped_fast_native_object_access-inl.h" 26#include "scoped_thread_state_change-inl.h" 27#include "ScopedLocalRef.h" 28#include "verify_object.h" 29 30namespace art { 31 32static jchar String_charAt(JNIEnv* env, jobject java_this, jint index) { 33 ScopedFastNativeObjectAccess soa(env); 34 return soa.Decode<mirror::String>(java_this)->CharAt(index); 35} 36 37static jint String_compareTo(JNIEnv* env, jobject java_this, jobject java_rhs) { 38 ScopedFastNativeObjectAccess soa(env); 39 if (UNLIKELY(java_rhs == nullptr)) { 40 ThrowNullPointerException("rhs == null"); 41 return -1; 42 } else { 43 return soa.Decode<mirror::String>(java_this)->CompareTo( 44 soa.Decode<mirror::String>(java_rhs).Ptr()); 45 } 46} 47 48static jstring String_concat(JNIEnv* env, jobject java_this, jobject java_string_arg) { 49 ScopedFastNativeObjectAccess soa(env); 50 if (UNLIKELY(java_string_arg == nullptr)) { 51 ThrowNullPointerException("string arg == null"); 52 return nullptr; 53 } 54 StackHandleScope<2> hs(soa.Self()); 55 Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String>(java_this))); 56 Handle<mirror::String> string_arg(hs.NewHandle(soa.Decode<mirror::String>(java_string_arg))); 57 int32_t length_this = string_this->GetLength(); 58 int32_t length_arg = string_arg->GetLength(); 59 if (length_arg > 0 && length_this > 0) { 60 ObjPtr<mirror::String> result = 61 mirror::String::AllocFromStrings(soa.Self(), string_this, string_arg); 62 return soa.AddLocalReference<jstring>(result); 63 } 64 jobject string_original = (length_this == 0) ? java_string_arg : java_this; 65 return reinterpret_cast<jstring>(string_original); 66} 67 68static jint String_fastIndexOf(JNIEnv* env, jobject java_this, jint ch, jint start) { 69 ScopedFastNativeObjectAccess soa(env); 70 // This method does not handle supplementary characters. They're dealt with in managed code. 71 DCHECK_LE(ch, 0xffff); 72 return soa.Decode<mirror::String>(java_this)->FastIndexOf(ch, start); 73} 74 75static jstring String_fastSubstring(JNIEnv* env, jobject java_this, jint start, jint length) { 76 ScopedFastNativeObjectAccess soa(env); 77 StackHandleScope<1> hs(soa.Self()); 78 Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String>(java_this))); 79 gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator(); 80 ObjPtr<mirror::String> result = mirror::String::AllocFromString<true>(soa.Self(), 81 length, 82 string_this, 83 start, 84 allocator_type); 85 return soa.AddLocalReference<jstring>(result); 86} 87 88static void String_getCharsNoCheck(JNIEnv* env, jobject java_this, jint start, jint end, 89 jcharArray buffer, jint index) { 90 ScopedFastNativeObjectAccess soa(env); 91 StackHandleScope<1> hs(soa.Self()); 92 Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray>(buffer))); 93 soa.Decode<mirror::String>(java_this)->GetChars(start, end, char_array, index); 94} 95 96static jstring String_intern(JNIEnv* env, jobject java_this) { 97 ScopedFastNativeObjectAccess soa(env); 98 ObjPtr<mirror::String> result = soa.Decode<mirror::String>(java_this)->Intern(); 99 return soa.AddLocalReference<jstring>(result); 100} 101 102static jstring String_doReplace(JNIEnv* env, jobject java_this, jchar old_c, jchar new_c) { 103 ScopedFastNativeObjectAccess soa(env); 104 StackHandleScope<1> hs(soa.Self()); 105 Handle<mirror::String> string = hs.NewHandle(soa.Decode<mirror::String>(java_this)); 106 ObjPtr<mirror::String> result = mirror::String::DoReplace(soa.Self(), string, old_c, new_c); 107 return soa.AddLocalReference<jstring>(result); 108} 109 110static jcharArray String_toCharArray(JNIEnv* env, jobject java_this) { 111 ScopedFastNativeObjectAccess soa(env); 112 ObjPtr<mirror::String> s = soa.Decode<mirror::String>(java_this); 113 return soa.AddLocalReference<jcharArray>(s->ToCharArray(soa.Self())); 114} 115 116static JNINativeMethod gMethods[] = { 117 FAST_NATIVE_METHOD(String, charAt, "(I)C"), 118 FAST_NATIVE_METHOD(String, compareTo, "(Ljava/lang/String;)I"), 119 FAST_NATIVE_METHOD(String, concat, "(Ljava/lang/String;)Ljava/lang/String;"), 120 FAST_NATIVE_METHOD(String, doReplace, "(CC)Ljava/lang/String;"), 121 FAST_NATIVE_METHOD(String, fastIndexOf, "(II)I"), 122 FAST_NATIVE_METHOD(String, fastSubstring, "(II)Ljava/lang/String;"), 123 FAST_NATIVE_METHOD(String, getCharsNoCheck, "(II[CI)V"), 124 FAST_NATIVE_METHOD(String, intern, "()Ljava/lang/String;"), 125 FAST_NATIVE_METHOD(String, toCharArray, "()[C"), 126}; 127 128void register_java_lang_String(JNIEnv* env) { 129 REGISTER_NATIVE_METHODS("java/lang/String"); 130} 131 132} // namespace art 133