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