string-inl.h revision 70c71ab1c2e44a74fc4eb76d6a0530f773850196 
1/*
2 * Copyright (C) 2011 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#ifndef ART_RUNTIME_MIRROR_STRING_INL_H_
18#define ART_RUNTIME_MIRROR_STRING_INL_H_
19
20#include "array.h"
21#include "class.h"
22#include "intern_table.h"
23#include "runtime.h"
24#include "string.h"
25#include "thread.h"
26#include "utf.h"
27
28namespace art {
29namespace mirror {
30
31inline uint32_t String::ClassSize() {
32  uint32_t vtable_entries = Object::kVTableLength + 51;
33  return Class::ComputeClassSize(true, vtable_entries, 1, 1, 2);
34}
35
36inline CharArray* String::GetCharArray() {
37  return GetFieldObject<CharArray>(ValueOffset());
38}
39
40inline int32_t String::GetLength() {
41  int32_t result = GetField32(OFFSET_OF_OBJECT_MEMBER(String, count_));
42  DCHECK(result >= 0 && result <= GetCharArray()->GetLength());
43  return result;
44}
45
46inline void String::SetArray(CharArray* new_array) {
47  // Array is invariant so use non-transactional mode. Also disable check as we may run inside
48  // a transaction.
49  DCHECK(new_array != NULL);
50  SetFieldObject<false, false>(OFFSET_OF_OBJECT_MEMBER(String, array_), new_array);
51}
52
53inline String* String::Intern() {
54  return Runtime::Current()->GetInternTable()->InternWeak(this);
55}
56
57inline uint16_t String::CharAt(int32_t index) {
58  // TODO: do we need this? Equals is the only caller, and could
59  // bounds check itself.
60  DCHECK_GE(count_, 0);  // ensures the unsigned comparison is safe.
61  if (UNLIKELY(static_cast<uint32_t>(index) >= static_cast<uint32_t>(count_))) {
62    Thread* self = Thread::Current();
63    ThrowLocation throw_location = self->GetCurrentLocationForThrow();
64    self->ThrowNewExceptionF(throw_location, "Ljava/lang/StringIndexOutOfBoundsException;",
65                             "length=%i; index=%i", count_, index);
66    return 0;
67  }
68  return GetCharArray()->Get(index + GetOffset());
69}
70
71inline int32_t String::GetHashCode() {
72  int32_t result = GetField32(OFFSET_OF_OBJECT_MEMBER(String, hash_code_));
73  if (UNLIKELY(result == 0)) {
74    result = ComputeHashCode();
75  }
76  DCHECK(result != 0 || ComputeUtf16Hash(GetCharArray(), GetOffset(), GetLength()) == 0)
77      << ToModifiedUtf8() << " " << result;
78  return result;
79}
80
81}  // namespace mirror
82}  // namespace art
83
84#endif  // ART_RUNTIME_MIRROR_STRING_INL_H_
85