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39 | #ifndef QV4IDENTIFIER_H |
40 | #define QV4IDENTIFIER_H |
41 | |
42 | // |
43 | // W A R N I N G |
44 | // ------------- |
45 | // |
46 | // This file is not part of the Qt API. It exists purely as an |
47 | // implementation detail. This header file may change from version to |
48 | // version without notice, or even be removed. |
49 | // |
50 | // We mean it. |
51 | // |
52 | |
53 | #include <qstring.h> |
54 | #include <private/qv4global_p.h> |
55 | #include <private/qv4propertykey_p.h> |
56 | |
57 | QT_BEGIN_NAMESPACE |
58 | |
59 | namespace QV4 { |
60 | |
61 | struct IdentifierHashEntry { |
62 | PropertyKey identifier; |
63 | int value; |
64 | }; |
65 | |
66 | struct IdentifierHashData |
67 | { |
68 | IdentifierHashData(IdentifierTable *table, int numBits); |
69 | explicit IdentifierHashData(IdentifierHashData *other); |
70 | ~IdentifierHashData(); |
71 | void markObjects(MarkStack *markStack) const; |
72 | |
73 | QBasicAtomicInt refCount; |
74 | int alloc; |
75 | int size; |
76 | int numBits; |
77 | IdentifierTable *identifierTable; |
78 | IdentifierHashEntry *entries; |
79 | }; |
80 | |
81 | struct IdentifierHash |
82 | { |
83 | |
84 | IdentifierHashData *d = nullptr; |
85 | |
86 | IdentifierHash() {} |
87 | IdentifierHash(ExecutionEngine *engine); |
88 | inline IdentifierHash(const IdentifierHash &other); |
89 | inline ~IdentifierHash(); |
90 | inline IdentifierHash &operator=(const IdentifierHash &other); |
91 | |
92 | bool isEmpty() const { return !d; } |
93 | |
94 | inline int count() const; |
95 | |
96 | void detach(); |
97 | |
98 | void add(const QString &str, int value); |
99 | void add(Heap::String *str, int value); |
100 | |
101 | inline int value(const QString &str) const; |
102 | inline int value(String *str) const; |
103 | QString findId(int value) const; |
104 | |
105 | protected: |
106 | IdentifierHashEntry *addEntry(PropertyKey i); |
107 | const IdentifierHashEntry *lookup(PropertyKey identifier) const; |
108 | const IdentifierHashEntry *lookup(const QString &str) const; |
109 | const IdentifierHashEntry *lookup(String *str) const; |
110 | const PropertyKey toIdentifier(const QString &str) const; |
111 | const PropertyKey toIdentifier(Heap::String *str) const; |
112 | }; |
113 | |
114 | |
115 | inline IdentifierHash::IdentifierHash(const IdentifierHash &other) |
116 | { |
117 | d = other.d; |
118 | if (d) |
119 | d->refCount.ref(); |
120 | } |
121 | |
122 | inline IdentifierHash::~IdentifierHash() |
123 | { |
124 | if (d && !d->refCount.deref()) |
125 | delete d; |
126 | } |
127 | |
128 | IdentifierHash &IdentifierHash::operator=(const IdentifierHash &other) |
129 | { |
130 | if (other.d) |
131 | other.d->refCount.ref(); |
132 | if (d && !d->refCount.deref()) |
133 | delete d; |
134 | d = other.d; |
135 | return *this; |
136 | } |
137 | |
138 | inline int IdentifierHash::count() const |
139 | { |
140 | return d ? d->size : 0; |
141 | } |
142 | |
143 | inline |
144 | void IdentifierHash::add(const QString &str, int value) |
145 | { |
146 | IdentifierHashEntry *e = addEntry(i: toIdentifier(str)); |
147 | e->value = value; |
148 | } |
149 | |
150 | inline |
151 | void IdentifierHash::add(Heap::String *str, int value) |
152 | { |
153 | IdentifierHashEntry *e = addEntry(i: toIdentifier(str)); |
154 | e->value = value; |
155 | } |
156 | |
157 | inline int IdentifierHash::value(const QString &str) const |
158 | { |
159 | const IdentifierHashEntry *e = lookup(str); |
160 | return e ? e->value : -1; |
161 | } |
162 | |
163 | inline int IdentifierHash::value(String *str) const |
164 | { |
165 | const IdentifierHashEntry *e = lookup(str); |
166 | return e ? e->value : -1; |
167 | } |
168 | |
169 | } |
170 | |
171 | QT_END_NAMESPACE |
172 | |
173 | #endif |
174 | |