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
150
151
152
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef MOJO_PUBLIC_CPP_BINDINGS_STRING_H_
#define MOJO_PUBLIC_CPP_BINDINGS_STRING_H_
#include <string>
#include "mojo/public/cpp/bindings/lib/array_internal.h"
#include "mojo/public/cpp/bindings/type_converter.h"
#include "mojo/public/cpp/environment/logging.h"
namespace mojo {
class String {
public:
typedef internal::String_Data Data_;
String() : is_null_(true) {}
String(const std::string& str) : value_(str), is_null_(false) {}
String(const char* chars) : is_null_(!chars) {
if (chars)
value_ = chars;
}
String(const char* chars, size_t num_chars)
: value_(chars, num_chars),
is_null_(false) {
}
template <size_t N>
String(const char chars[N]) : value_(chars, N-1), is_null_(false) {}
template <typename U>
static String From(const U& other) {
return TypeConverter<String, U>::ConvertFrom(other);
}
template <typename U>
U To() const {
return TypeConverter<String, U>::ConvertTo(*this);
}
String& operator=(const std::string& str) {
value_ = str;
is_null_ = false;
return *this;
}
String& operator=(const char* chars) {
is_null_ = !chars;
if (chars) {
value_ = chars;
} else {
value_.clear();
}
return *this;
}
void reset() {
value_.clear();
is_null_ = true;
}
bool is_null() const { return is_null_; }
size_t size() const { return value_.size(); }
const char* data() const { return value_.data(); }
const char& at(size_t offset) const { return value_.at(offset); }
const char& operator[](size_t offset) const { return value_[offset]; }
const std::string& get() const { return value_; }
operator const std::string&() const { return value_; }
void Swap(String* other) {
std::swap(is_null_, other->is_null_);
value_.swap(other->value_);
}
void Swap(std::string* other) {
is_null_ = false;
value_.swap(*other);
}
private:
typedef std::string String::*Testable;
public:
operator Testable() const { return is_null_ ? 0 : &String::value_; }
private:
std::string value_;
bool is_null_;
};
inline bool operator==(const String& a, const String& b) {
return a.is_null() == b.is_null() && a.get() == b.get();
}
inline bool operator==(const char* a, const String& b) {
return !b.is_null() && a == b.get();
}
inline bool operator==(const String& a, const char* b) {
return !a.is_null() && a.get() == b;
}
inline bool operator!=(const String& a, const String& b) { return !(a == b); }
inline bool operator!=(const char* a, const String& b) { return !(a == b); }
inline bool operator!=(const String& a, const char* b) { return !(a == b); }
// TODO(darin): Add similar variants of operator<,<=,>,>=
template <>
class TypeConverter<String, std::string> {
public:
static String ConvertFrom(const std::string& input) {
return String(input);
}
static std::string ConvertTo(const String& input) {
return input;
}
};
template <size_t N>
class TypeConverter<String, char[N]> {
public:
static String ConvertFrom(const char input[N]) {
MOJO_DCHECK(input);
return String(input, N-1);
}
};
// Appease MSVC.
template <size_t N>
class TypeConverter<String, const char[N]> {
public:
static String ConvertFrom(const char input[N]) {
MOJO_DCHECK(input);
return String(input, N-1);
}
};
template <>
class TypeConverter<String, const char*> {
public:
// |input| may be null, in which case a null String will be returned.
static String ConvertFrom(const char* input) {
return String(input);
}
};
} // namespace mojo
#endif // MOJO_PUBLIC_CPP_BINDINGS_STRING_H_
|
