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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
57QT_BEGIN_NAMESPACE
58
59namespace QV4 {
60
61struct IdentifierHashEntry {
62 PropertyKey identifier;
63 int value;
64};
65
66struct 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
81struct 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
105protected:
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
115inline IdentifierHash::IdentifierHash(const IdentifierHash &other)
116{
117 d = other.d;
118 if (d)
119 d->refCount.ref();
120}
121
122inline IdentifierHash::~IdentifierHash()
123{
124 if (d && !d->refCount.deref())
125 delete d;
126}
127
128IdentifierHash &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
138inline int IdentifierHash::count() const
139{
140 return d ? d->size : 0;
141}
142
143inline
144void IdentifierHash::add(const QString &str, int value)
145{
146 IdentifierHashEntry *e = addEntry(i: toIdentifier(str));
147 e->value = value;
148}
149
150inline
151void IdentifierHash::add(Heap::String *str, int value)
152{
153 IdentifierHashEntry *e = addEntry(i: toIdentifier(str));
154 e->value = value;
155}
156
157inline int IdentifierHash::value(const QString &str) const
158{
159 const IdentifierHashEntry *e = lookup(str);
160 return e ? e->value : -1;
161}
162
163inline int IdentifierHash::value(String *str) const
164{
165 const IdentifierHashEntry *e = lookup(str);
166 return e ? e->value : -1;
167}
168
169}
170
171QT_END_NAMESPACE
172
173#endif
174

source code of qtdeclarative/src/qml/jsruntime/qv4identifier_p.h