[inspector] change implementation file extension from cpp to cc

src/inspector/String16.h

-// Copyright 2016 the V8 project 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 V8_INSPECTOR_STRING16_H_
-#define V8_INSPECTOR_STRING16_H_
-
-#include <stdint.h>
-#include <cctype>
-#include <climits>
-#include <cstring>
-#include <string>
-#include <vector>
-
-namespace v8_inspector {
-
-using UChar = uint16_t;
-
-class String16 {
- public:
-  static const size_t kNotFound = static_cast<size_t>(-1);
-
-  String16() {}
-  String16(const String16& other) : m_impl(other.m_impl) {}
-  String16(const UChar* characters, size_t size) : m_impl(characters, size) {}
-  String16(const UChar* characters) : m_impl(characters) {}
-  String16(const char* characters)
-      : String16(characters, std::strlen(characters)) {}
-  String16(const char* characters, size_t size) {
-    m_impl.resize(size);
-    for (size_t i = 0; i < size; ++i) m_impl[i] = characters[i];
-  }
-
-  static String16 fromInteger(int);
-  static String16 fromDouble(double);
-  static String16 fromDoublePrecision3(double);
-  static String16 fromDoublePrecision6(double);
-
-  int toInteger(bool* ok = nullptr) const;
-  String16 stripWhiteSpace() const;
-  const UChar* characters16() const { return m_impl.c_str(); }
-  size_t length() const { return m_impl.length(); }
-  bool isEmpty() const { return !m_impl.length(); }
-  UChar operator[](unsigned index) const { return m_impl[index]; }
-  String16 substring(unsigned pos, unsigned len = UINT_MAX) const {
-    return String16(m_impl.substr(pos, len));
-  }
-  size_t find(const String16& str, unsigned start = 0) const {
-    return m_impl.find(str.m_impl, start);
-  }
-  size_t reverseFind(const String16& str, unsigned start = UINT_MAX) const {
-    return m_impl.rfind(str.m_impl, start);
-  }
-  void swap(String16& other) { m_impl.swap(other.m_impl); }
-
-  // Convenience methods.
-  std::string utf8() const;
-  static String16 fromUTF8(const char* stringStart, size_t length);
-
-  const std::basic_string<UChar>& impl() const { return m_impl; }
-  explicit String16(const std::basic_string<UChar>& impl) : m_impl(impl) {}
-
-  std::size_t hash() const {
-    if (!has_hash) {
-      size_t hash = 0;
-      for (size_t i = 0; i < length(); ++i) hash = 31 * hash + m_impl[i];
-      hash_code = hash;
-      has_hash = true;
-    }
-    return hash_code;
-  }
-
- private:
-  std::basic_string<UChar> m_impl;
-  mutable bool has_hash = false;
-  mutable std::size_t hash_code = 0;
-};
-
-inline bool operator==(const String16& a, const String16& b) {
-  return a.impl() == b.impl();
-}
-inline bool operator<(const String16& a, const String16& b) {
-  return a.impl() < b.impl();
-}
-inline bool operator!=(const String16& a, const String16& b) {
-  return a.impl() != b.impl();
-}
-inline bool operator==(const String16& a, const char* b) {
-  return a.impl() == String16(b).impl();
-}
-inline String16 operator+(const String16& a, const char* b) {
-  return String16(a.impl() + String16(b).impl());
-}
-inline String16 operator+(const char* a, const String16& b) {
-  return String16(String16(a).impl() + b.impl());
-}
-inline String16 operator+(const String16& a, const String16& b) {
-  return String16(a.impl() + b.impl());
-}
-
-class String16Builder {
- public:
-  String16Builder();
-  void append(const String16&);
-  void append(UChar);
-  void append(char);
-  void append(const UChar*, size_t);
-  void append(const char*, size_t);
-  String16 toString();
-  void reserveCapacity(size_t);
-
- private:
-  std::vector<UChar> m_buffer;
-};
-
-}  // namespace v8_inspector
-
-#if !defined(__APPLE__) || defined(_LIBCPP_VERSION)
-
-namespace std {
-template <>
-struct hash<v8_inspector::String16> {
-  std::size_t operator()(const v8_inspector::String16& string) const {
-    return string.hash();
-  }
-};
-
-}  // namespace std
-
-#endif  // !defined(__APPLE__) || defined(_LIBCPP_VERSION)
-
-#endif  // V8_INSPECTOR_STRING16_H_