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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "java_lang_String.h"
#include "common_throws.h"
#include "jni_internal.h"
#include "mirror/array.h"
#include "mirror/object-inl.h"
#include "mirror/string.h"
#include "mirror/string-inl.h"
#include "scoped_fast_native_object_access.h"
#include "scoped_thread_state_change.h"
#include "ScopedLocalRef.h"
#include "verify_object-inl.h"
namespace art {
static jchar String_charAt(JNIEnv* env, jobject java_this, jint index) {
ScopedFastNativeObjectAccess soa(env);
return soa.Decode<mirror::String*>(java_this)->CharAt(index);
}
static jint String_compareTo(JNIEnv* env, jobject java_this, jobject java_rhs) {
ScopedFastNativeObjectAccess soa(env);
if (UNLIKELY(java_rhs == nullptr)) {
ThrowNullPointerException("rhs == null");
return -1;
} else {
return soa.Decode<mirror::String*>(java_this)->CompareTo(soa.Decode<mirror::String*>(java_rhs));
}
}
static jstring String_concat(JNIEnv* env, jobject java_this, jobject java_string_arg) {
ScopedFastNativeObjectAccess soa(env);
if (UNLIKELY(java_string_arg == nullptr)) {
ThrowNullPointerException("string arg == null");
return nullptr;
}
StackHandleScope<2> hs(soa.Self());
Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String*>(java_this)));
Handle<mirror::String> string_arg(hs.NewHandle(soa.Decode<mirror::String*>(java_string_arg)));
int32_t length_this = string_this->GetLength();
int32_t length_arg = string_arg->GetLength();
if (length_arg > 0 && length_this > 0) {
mirror::String* result = mirror::String::AllocFromStrings(soa.Self(), string_this, string_arg);
return soa.AddLocalReference<jstring>(result);
}
jobject string_original = (length_this == 0) ? java_string_arg : java_this;
return reinterpret_cast<jstring>(string_original);
}
static jint String_fastIndexOf(JNIEnv* env, jobject java_this, jint ch, jint start) {
ScopedFastNativeObjectAccess soa(env);
// This method does not handle supplementary characters. They're dealt with in managed code.
DCHECK_LE(ch, 0xffff);
return soa.Decode<mirror::String*>(java_this)->FastIndexOf(ch, start);
}
static jstring String_fastSubstring(JNIEnv* env, jobject java_this, jint start, jint length) {
ScopedFastNativeObjectAccess soa(env);
StackHandleScope<1> hs(soa.Self());
Handle<mirror::String> string_this(hs.NewHandle(soa.Decode<mirror::String*>(java_this)));
gc::AllocatorType allocator_type = Runtime::Current()->GetHeap()->GetCurrentAllocator();
mirror::String* result = mirror::String::AllocFromString<true>(soa.Self(), length, string_this,
start, allocator_type);
return soa.AddLocalReference<jstring>(result);
}
static void String_getCharsNoCheck(JNIEnv* env, jobject java_this, jint start, jint end,
jcharArray buffer, jint index) {
ScopedFastNativeObjectAccess soa(env);
StackHandleScope<1> hs(soa.Self());
Handle<mirror::CharArray> char_array(hs.NewHandle(soa.Decode<mirror::CharArray*>(buffer)));
soa.Decode<mirror::String*>(java_this)->GetChars(start, end, char_array, index);
}
static jstring String_intern(JNIEnv* env, jobject java_this) {
ScopedFastNativeObjectAccess soa(env);
mirror::String* s = soa.Decode<mirror::String*>(java_this);
mirror::String* result = s->Intern();
return soa.AddLocalReference<jstring>(result);
}
static void String_setCharAt(JNIEnv* env, jobject java_this, jint index, jchar c) {
ScopedFastNativeObjectAccess soa(env);
soa.Decode<mirror::String*>(java_this)->SetCharAt(index, c);
}
static jcharArray String_toCharArray(JNIEnv* env, jobject java_this) {
ScopedFastNativeObjectAccess soa(env);
mirror::String* s = soa.Decode<mirror::String*>(java_this);
return soa.AddLocalReference<jcharArray>(s->ToCharArray(soa.Self()));
}
static JNINativeMethod gMethods[] = {
NATIVE_METHOD(String, charAt, "!(I)C"),
NATIVE_METHOD(String, compareTo, "!(Ljava/lang/String;)I"),
NATIVE_METHOD(String, concat, "!(Ljava/lang/String;)Ljava/lang/String;"),
NATIVE_METHOD(String, fastIndexOf, "!(II)I"),
NATIVE_METHOD(String, fastSubstring, "!(II)Ljava/lang/String;"),
NATIVE_METHOD(String, getCharsNoCheck, "!(II[CI)V"),
NATIVE_METHOD(String, intern, "!()Ljava/lang/String;"),
NATIVE_METHOD(String, setCharAt, "!(IC)V"),
NATIVE_METHOD(String, toCharArray, "!()[C"),
};
void register_java_lang_String(JNIEnv* env) {
REGISTER_NATIVE_METHODS("java/lang/String");
}
} // namespace art
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