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1 /* | 1 /* |
2 * Copyright (C) 2012 Apple Inc. All Rights Reserved. | 2 * Copyright (C) 2012 Apple Inc. All Rights Reserved. |
3 * Copyright (C) 2012 Patrick Gansterer <paroga@paroga.com> | 3 * Copyright (C) 2012 Patrick Gansterer <paroga@paroga.com> |
4 * | 4 * |
5 * This library is free software; you can redistribute it and/or | 5 * This library is free software; you can redistribute it and/or |
6 * modify it under the terms of the GNU Library General Public | 6 * modify it under the terms of the GNU Library General Public |
7 * License as published by the Free Software Foundation; either | 7 * License as published by the Free Software Foundation; either |
8 * version 2 of the License, or (at your option) any later version. | 8 * version 2 of the License, or (at your option) any later version. |
9 * | 9 * |
10 * This library is distributed in the hope that it will be useful, | 10 * This library is distributed in the hope that it will be useful, |
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43 LChar* end = m_buffer + WTF_ARRAY_LENGTH(m_buffer); | 43 LChar* end = m_buffer + WTF_ARRAY_LENGTH(m_buffer); |
44 m_begin = end; | 44 m_begin = end; |
45 | 45 |
46 // We need to switch to the unsigned type when negating the value since | 46 // We need to switch to the unsigned type when negating the value since |
47 // abs(INT_MIN) == INT_MAX + 1. | 47 // abs(INT_MIN) == INT_MAX + 1. |
48 bool isNegative = base::IsValueNegative(input); | 48 bool isNegative = base::IsValueNegative(input); |
49 UnsignedIntegerType value = isNegative ? 0u - input : input; | 49 UnsignedIntegerType value = isNegative ? 0u - input : input; |
50 | 50 |
51 do { | 51 do { |
52 --m_begin; | 52 --m_begin; |
53 ASSERT(m_begin != m_buffer); | 53 DCHECK_NE(m_begin, m_buffer); |
54 *m_begin = static_cast<LChar>((value % 10) + '0'); | 54 *m_begin = static_cast<LChar>((value % 10) + '0'); |
55 value /= 10; | 55 value /= 10; |
56 } while (value); | 56 } while (value); |
57 | 57 |
58 if (isNegative) { | 58 if (isNegative) { |
59 --m_begin; | 59 --m_begin; |
60 ASSERT(m_begin != m_buffer); | 60 DCHECK_NE(m_begin, m_buffer); |
61 *m_begin = static_cast<LChar>('-'); | 61 *m_begin = static_cast<LChar>('-'); |
62 } | 62 } |
63 | 63 |
64 m_length = static_cast<unsigned>(end - m_begin); | 64 m_length = static_cast<unsigned>(end - m_begin); |
65 } | 65 } |
66 | 66 |
67 const LChar* characters8() const { return m_begin; } | 67 const LChar* characters8() const { return m_begin; } |
68 unsigned length() const { return m_length; } | 68 unsigned length() const { return m_length; } |
69 | 69 |
70 private: | 70 private: |
71 using UnsignedIntegerType = typename std::make_unsigned<IntegerType>::type; | 71 using UnsignedIntegerType = typename std::make_unsigned<IntegerType>::type; |
72 static const size_t kBufferSize = 3 * sizeof(UnsignedIntegerType) + | 72 static const size_t kBufferSize = 3 * sizeof(UnsignedIntegerType) + |
73 std::numeric_limits<IntegerType>::is_signed; | 73 std::numeric_limits<IntegerType>::is_signed; |
74 | 74 |
75 LChar m_buffer[kBufferSize]; | 75 LChar m_buffer[kBufferSize]; |
76 LChar* m_begin; | 76 LChar* m_begin; |
77 unsigned m_length; | 77 unsigned m_length; |
78 }; | 78 }; |
79 | 79 |
80 } // namespace WTF | 80 } // namespace WTF |
81 | 81 |
82 #endif // IntegerToStringConversion_h | 82 #endif // IntegerToStringConversion_h |
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