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1 // Copyright 2016 the V8 project authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef V8_INSPECTOR_STRING16_H_ | |
6 #define V8_INSPECTOR_STRING16_H_ | |
7 | |
8 #include <stdint.h> | |
9 #include <cctype> | |
10 #include <climits> | |
11 #include <cstring> | |
12 #include <string> | |
13 #include <vector> | |
14 | |
15 namespace v8_inspector { | |
16 | |
17 using UChar = uint16_t; | |
18 | |
19 class String16 { | |
20 public: | |
21 static const size_t kNotFound = static_cast<size_t>(-1); | |
22 | |
23 String16() {} | |
24 String16(const String16& other) : m_impl(other.m_impl) {} | |
25 String16(const UChar* characters, size_t size) : m_impl(characters, size) {} | |
26 String16(const UChar* characters) : m_impl(characters) {} | |
27 String16(const char* characters) | |
28 : String16(characters, std::strlen(characters)) {} | |
29 String16(const char* characters, size_t size) { | |
30 m_impl.resize(size); | |
31 for (size_t i = 0; i < size; ++i) m_impl[i] = characters[i]; | |
32 } | |
33 | |
34 static String16 fromInteger(int); | |
35 static String16 fromDouble(double); | |
36 static String16 fromDoublePrecision3(double); | |
37 static String16 fromDoublePrecision6(double); | |
38 | |
39 int toInteger(bool* ok = nullptr) const; | |
40 String16 stripWhiteSpace() const; | |
41 const UChar* characters16() const { return m_impl.c_str(); } | |
42 size_t length() const { return m_impl.length(); } | |
43 bool isEmpty() const { return !m_impl.length(); } | |
44 UChar operator[](unsigned index) const { return m_impl[index]; } | |
45 String16 substring(unsigned pos, unsigned len = UINT_MAX) const { | |
46 return String16(m_impl.substr(pos, len)); | |
47 } | |
48 size_t find(const String16& str, unsigned start = 0) const { | |
49 return m_impl.find(str.m_impl, start); | |
50 } | |
51 size_t reverseFind(const String16& str, unsigned start = UINT_MAX) const { | |
52 return m_impl.rfind(str.m_impl, start); | |
53 } | |
54 void swap(String16& other) { m_impl.swap(other.m_impl); } | |
55 | |
56 // Convenience methods. | |
57 std::string utf8() const; | |
58 static String16 fromUTF8(const char* stringStart, size_t length); | |
59 | |
60 const std::basic_string<UChar>& impl() const { return m_impl; } | |
61 explicit String16(const std::basic_string<UChar>& impl) : m_impl(impl) {} | |
62 | |
63 std::size_t hash() const { | |
64 if (!has_hash) { | |
65 size_t hash = 0; | |
66 for (size_t i = 0; i < length(); ++i) hash = 31 * hash + m_impl[i]; | |
67 hash_code = hash; | |
68 has_hash = true; | |
69 } | |
70 return hash_code; | |
71 } | |
72 | |
73 private: | |
74 std::basic_string<UChar> m_impl; | |
75 mutable bool has_hash = false; | |
76 mutable std::size_t hash_code = 0; | |
77 }; | |
78 | |
79 inline bool operator==(const String16& a, const String16& b) { | |
80 return a.impl() == b.impl(); | |
81 } | |
82 inline bool operator<(const String16& a, const String16& b) { | |
83 return a.impl() < b.impl(); | |
84 } | |
85 inline bool operator!=(const String16& a, const String16& b) { | |
86 return a.impl() != b.impl(); | |
87 } | |
88 inline bool operator==(const String16& a, const char* b) { | |
89 return a.impl() == String16(b).impl(); | |
90 } | |
91 inline String16 operator+(const String16& a, const char* b) { | |
92 return String16(a.impl() + String16(b).impl()); | |
93 } | |
94 inline String16 operator+(const char* a, const String16& b) { | |
95 return String16(String16(a).impl() + b.impl()); | |
96 } | |
97 inline String16 operator+(const String16& a, const String16& b) { | |
98 return String16(a.impl() + b.impl()); | |
99 } | |
100 | |
101 class String16Builder { | |
102 public: | |
103 String16Builder(); | |
104 void append(const String16&); | |
105 void append(UChar); | |
106 void append(char); | |
107 void append(const UChar*, size_t); | |
108 void append(const char*, size_t); | |
109 String16 toString(); | |
110 void reserveCapacity(size_t); | |
111 | |
112 private: | |
113 std::vector<UChar> m_buffer; | |
114 }; | |
115 | |
116 } // namespace v8_inspector | |
117 | |
118 #if !defined(__APPLE__) || defined(_LIBCPP_VERSION) | |
119 | |
120 namespace std { | |
121 template <> | |
122 struct hash<v8_inspector::String16> { | |
123 std::size_t operator()(const v8_inspector::String16& string) const { | |
124 return string.hash(); | |
125 } | |
126 }; | |
127 | |
128 } // namespace std | |
129 | |
130 #endif // !defined(__APPLE__) || defined(_LIBCPP_VERSION) | |
131 | |
132 #endif // V8_INSPECTOR_STRING16_H_ | |
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