1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/FlyString.h>
#include <AK/HashTable.h>
#include <AK/Optional.h>
#include <AK/Singleton.h>
#include <AK/String.h>
#include <AK/StringUtils.h>
#include <AK/StringView.h>
namespace AK {
struct FlyStringImplTraits : public Traits<StringImpl*> {
static unsigned hash(const StringImpl* s) { return s ? s->hash() : 0; }
static bool equals(const StringImpl* a, const StringImpl* b)
{
VERIFY(a);
VERIFY(b);
return *a == *b;
}
};
static Singleton<HashTable<StringImpl*, FlyStringImplTraits>> s_table;
static HashTable<StringImpl*, FlyStringImplTraits>& fly_impls()
{
return *s_table;
}
void FlyString::did_destroy_impl(Badge<StringImpl>, StringImpl& impl)
{
fly_impls().remove(&impl);
}
FlyString::FlyString(const String& string)
{
if (string.is_null())
return;
if (string.impl()->is_fly()) {
m_impl = string.impl();
return;
}
auto it = fly_impls().find(const_cast<StringImpl*>(string.impl()));
if (it == fly_impls().end()) {
fly_impls().set(const_cast<StringImpl*>(string.impl()));
string.impl()->set_fly({}, true);
m_impl = string.impl();
} else {
VERIFY((*it)->is_fly());
m_impl = *it;
}
}
FlyString::FlyString(StringView string)
{
if (string.is_null())
return;
auto it = fly_impls().find(string.hash(), [&](auto& candidate) {
return string == candidate;
});
if (it == fly_impls().end()) {
auto new_string = string.to_string();
fly_impls().set(new_string.impl());
new_string.impl()->set_fly({}, true);
m_impl = new_string.impl();
} else {
VERIFY((*it)->is_fly());
m_impl = *it;
}
}
template<typename T>
Optional<T> FlyString::to_int(TrimWhitespace trim_whitespace) const
{
return StringUtils::convert_to_int<T>(view(), trim_whitespace);
}
template Optional<i8> FlyString::to_int(TrimWhitespace) const;
template Optional<i16> FlyString::to_int(TrimWhitespace) const;
template Optional<i32> FlyString::to_int(TrimWhitespace) const;
template Optional<i64> FlyString::to_int(TrimWhitespace) const;
template<typename T>
Optional<T> FlyString::to_uint(TrimWhitespace trim_whitespace) const
{
return StringUtils::convert_to_uint<T>(view(), trim_whitespace);
}
template Optional<u8> FlyString::to_uint(TrimWhitespace) const;
template Optional<u16> FlyString::to_uint(TrimWhitespace) const;
template Optional<u32> FlyString::to_uint(TrimWhitespace) const;
template Optional<u64> FlyString::to_uint(TrimWhitespace) const;
bool FlyString::equals_ignoring_case(StringView other) const
{
return StringUtils::equals_ignoring_case(view(), other);
}
bool FlyString::starts_with(StringView str, CaseSensitivity case_sensitivity) const
{
return StringUtils::starts_with(view(), str, case_sensitivity);
}
bool FlyString::ends_with(StringView str, CaseSensitivity case_sensitivity) const
{
return StringUtils::ends_with(view(), str, case_sensitivity);
}
FlyString FlyString::to_lowercase() const
{
return String(*m_impl).to_lowercase();
}
bool FlyString::operator==(const String& other) const
{
if (m_impl == other.impl())
return true;
if (!m_impl)
return !other.impl();
if (!other.impl())
return false;
if (length() != other.length())
return false;
return !__builtin_memcmp(characters(), other.characters(), length());
}
bool FlyString::operator==(StringView string) const
{
return *this == String(string);
}
bool FlyString::operator==(const char* string) const
{
if (is_null())
return !string;
if (!string)
return false;
return !__builtin_strcmp(m_impl->characters(), string);
}
}
|
