Move files in wtf/ to platform/wtf/ (Part 9).

third_party/WebKit/Source/wtf/text/IntegerToStringConversion.h

-/*
- * Copyright (C) 2012 Apple Inc. All Rights Reserved.
- * Copyright (C) 2012 Patrick Gansterer <paroga@paroga.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this library; see the file COPYING.LIB.  If not, write to
- * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
- * Boston, MA 02110-1301, USA.
- *
- */
+// Copyright 2017 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 IntegerToStringConversion_h
-#define IntegerToStringConversion_h
+#include "platform/wtf/text/IntegerToStringConversion.h"
 
-#include "base/numerics/safe_conversions.h"
-#include "wtf/StdLibExtras.h"
-#include "wtf/text/Unicode.h"
-#include <limits>
-#include <type_traits>
-
-namespace WTF {
-
-// TODO(esprehn): See if we can generalize IntToStringT in
-// base/strings/string_number_conversions.cc, and use unsigned type expansion
-// optimization here instead of CheckedNumeric::UnsignedAbs().
-template <typename IntegerType>
-class IntegerToStringConverter {
- public:
-  static_assert(std::is_integral<IntegerType>::value,
-                "IntegerType must be a type of integer.");
-
-  explicit IntegerToStringConverter(IntegerType input) {
-    LChar* end = m_buffer + WTF_ARRAY_LENGTH(m_buffer);
-    m_begin = end;
-
-    // We need to switch to the unsigned type when negating the value since
-    // abs(INT_MIN) == INT_MAX + 1.
-    bool isNegative = base::IsValueNegative(input);
-    UnsignedIntegerType value = isNegative ? 0u - input : input;
-
-    do {
-      --m_begin;
-      DCHECK_NE(m_begin, m_buffer);
-      *m_begin = static_cast<LChar>((value % 10) + '0');
-      value /= 10;
-    } while (value);
-
-    if (isNegative) {
-      --m_begin;
-      DCHECK_NE(m_begin, m_buffer);
-      *m_begin = static_cast<LChar>('-');
-    }
-
-    m_length = static_cast<unsigned>(end - m_begin);
-  }
-
-  const LChar* characters8() const { return m_begin; }
-  unsigned length() const { return m_length; }
-
- private:
-  using UnsignedIntegerType = typename std::make_unsigned<IntegerType>::type;
-  static const size_t kBufferSize = 3 * sizeof(UnsignedIntegerType) +
-                                    std::numeric_limits<IntegerType>::is_signed;
-
-  LChar m_buffer[kBufferSize];
-  LChar* m_begin;
-  unsigned m_length;
-};
-
-}  // namespace WTF
-
-#endif  // IntegerToStringConversion_h
+// The contents of this header was moved to platform/wtf as part of
+// WTF migration project. See the following post for details:
+// https://groups.google.com/a/chromium.org/d/msg/blink-dev/tLdAZCTlcAA/bYXVT8gYCAAJ