1 /**
2 * Copyright (c) 2021-2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 #ifndef PANDA_RUNTIME_KLASS_HELPER_H_
16 #define PANDA_RUNTIME_KLASS_HELPER_H_
17
18 #include <cstdint>
19
20 #include "libpandabase/utils/span.h"
21 #include "libpandafile/file_items.h"
22 #include "runtime/include/coretypes/tagged_value.h"
23 #include "runtime/include/mem/panda_string.h"
24 #include "runtime/object_header_config.h"
25
26 namespace panda {
27
28 // Small helper
29 template <class Config>
30 class ClassConfig {
31 public:
32 using classWordSize = typename Config::Size;
33 };
34
35 class ClassHelper : private ClassConfig<MemoryModelConfig> {
36 public:
37 using classWordSize = typename ClassConfig::classWordSize; // To be visible outside
38
39 static constexpr size_t OBJECT_POINTER_SIZE = sizeof(classWordSize);
40 // In general for any T: sizeof(T*) != OBJECT_POINTER_SIZE
41 static constexpr size_t POINTER_SIZE = sizeof(uintptr_t);
42
43 static const uint8_t *GetDescriptor(const uint8_t *name, PandaString *storage);
44
45 static const uint8_t *GetTypeDescriptor(const PandaString &name, PandaString *storage);
46
47 static const uint8_t *GetArrayDescriptor(const uint8_t *component_name, size_t rank, PandaString *storage);
48
49 static char GetPrimitiveTypeDescriptorChar(panda_file::Type::TypeId type_id);
50
51 static const uint8_t *GetPrimitiveTypeDescriptorStr(panda_file::Type::TypeId type_id);
52
53 static const char *GetPrimitiveTypeStr(panda_file::Type::TypeId type_id);
54
55 static const uint8_t *GetPrimitiveDescriptor(panda_file::Type type, PandaString *storage);
56
57 static const uint8_t *GetPrimitiveArrayDescriptor(panda_file::Type type, size_t rank, PandaString *storage);
58
59 template <typename Str = std::string>
60 static Str GetName(const uint8_t *descriptor);
61
IsArrayDescriptor(const uint8_t * descriptor)62 static bool IsArrayDescriptor(const uint8_t *descriptor)
63 {
64 Span<const uint8_t> sp(descriptor, 1);
65 return sp[0] == '[';
66 }
67
GetComponentDescriptor(const uint8_t * descriptor)68 static const uint8_t *GetComponentDescriptor(const uint8_t *descriptor)
69 {
70 ASSERT(IsArrayDescriptor(descriptor));
71 Span<const uint8_t> sp(descriptor, 1);
72 return sp.cend();
73 }
74
GetDimensionality(const uint8_t * descriptor)75 static size_t GetDimensionality(const uint8_t *descriptor)
76 {
77 ASSERT(IsArrayDescriptor(descriptor));
78 size_t dim = 0;
79 // NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
80 while (*descriptor++ == '[') {
81 ++dim;
82 }
83 return dim;
84 }
85 };
86
87 // Str is std::string or PandaString
88 /* static */
89 template <typename Str>
GetName(const uint8_t * descriptor)90 Str ClassHelper::GetName(const uint8_t *descriptor)
91 {
92 switch (*descriptor) {
93 case 'V':
94 return "void";
95 case 'Z':
96 return "u1";
97 case 'B':
98 return "i8";
99 case 'H':
100 return "u8";
101 case 'S':
102 return "i16";
103 case 'C':
104 return "u16";
105 case 'I':
106 return "i32";
107 case 'U':
108 return "u32";
109 case 'J':
110 return "i64";
111 case 'Q':
112 return "u64";
113 case 'F':
114 return "f32";
115 case 'D':
116 return "f64";
117 case 'A':
118 return "any";
119 default: {
120 break;
121 }
122 }
123
124 Str name = utf::Mutf8AsCString(descriptor);
125 if (name[0] == '[') {
126 return name;
127 }
128
129 std::replace(name.begin(), name.end(), '/', '.');
130
131 ASSERT(name.size() > 2); // 2 - L and ;
132
133 name.erase(0, 1);
134 name.pop_back();
135
136 return name;
137 }
138
139 } // namespace panda
140
141 #endif // PANDA_RUNTIME_KLASS_HELPER_H_
142