1 /* 2 * Copyright (C) 2019 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_STRING_BUILDER_APPEND_H_ 18 #define ART_RUNTIME_STRING_BUILDER_APPEND_H_ 19 20 #include <stddef.h> 21 #include <stdint.h> 22 23 #include "base/bit_utils.h" 24 #include "base/locks.h" 25 #include "obj_ptr.h" 26 27 namespace art { 28 29 class Thread; 30 31 namespace mirror { 32 class String; 33 } // namespace mirror 34 35 class StringBuilderAppend { 36 public: 37 enum class Argument : uint8_t { 38 kEnd = 0u, 39 kObject, 40 kStringBuilder, 41 kString, 42 kCharArray, 43 kBoolean, 44 kChar, 45 kInt, 46 kLong, 47 kFloat, 48 kDouble, 49 kLast = kDouble 50 }; 51 52 static constexpr size_t kBitsPerArg = 53 MinimumBitsToStore(static_cast<size_t>(Argument::kLast)); 54 static constexpr size_t kMaxArgs = BitSizeOf<uint32_t>() / kBitsPerArg; 55 static_assert(kMaxArgs * kBitsPerArg == BitSizeOf<uint32_t>(), "Expecting no extra bits."); 56 static constexpr uint32_t kArgMask = MaxInt<uint32_t>(kBitsPerArg); 57 58 static ObjPtr<mirror::String> AppendF(uint32_t format, const uint32_t* args, Thread* self) 59 REQUIRES_SHARED(Locks::mutator_lock_); 60 61 private: 62 class Builder; 63 }; 64 65 } // namespace art 66 67 #endif // ART_RUNTIME_STRING_BUILDER_APPEND_H_ 68