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1 /* | 1 /* |
2 * Copyright (C) 2010 Apple Inc. All rights reserved. | 2 * Copyright (C) 2010 Apple Inc. All rights reserved. |
3 * Copyright (C) 2012 Google Inc. All rights reserved. | 3 * Copyright (C) 2012 Google Inc. All rights reserved. |
4 * | 4 * |
5 * Redistribution and use in source and binary forms, with or without | 5 * Redistribution and use in source and binary forms, with or without |
6 * modification, are permitted provided that the following conditions | 6 * modification, are permitted provided that the following conditions |
7 * are met: | 7 * are met: |
8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
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50 m_string = StringImpl::empty(); | 50 m_string = StringImpl::empty(); |
51 return; | 51 return; |
52 } | 52 } |
53 | 53 |
54 ASSERT(m_buffer && m_length <= m_buffer->length()); | 54 ASSERT(m_buffer && m_length <= m_buffer->length()); |
55 if (m_length == m_buffer->length()) { | 55 if (m_length == m_buffer->length()) { |
56 m_string = m_buffer.release(); | 56 m_string = m_buffer.release(); |
57 return; | 57 return; |
58 } | 58 } |
59 | 59 |
60 if (m_buffer->hasOneRef()) { | |
61 m_buffer->truncateAssumingIsolated(m_length); | |
62 m_string = m_buffer.release(); | |
63 return; | |
64 } | |
65 | |
66 m_string = m_buffer->substring(0, m_length); | 60 m_string = m_buffer->substring(0, m_length); |
67 } | 61 } |
68 | 62 |
69 String StringBuilder::reifySubstring(unsigned position, unsigned length) const | 63 String StringBuilder::reifySubstring(unsigned position, unsigned length) const |
70 { | 64 { |
71 ASSERT(m_string.isNull()); | 65 ASSERT(m_string.isNull()); |
72 ASSERT(m_buffer); | 66 ASSERT(m_buffer); |
73 unsigned substringLength = std::min(length, m_length - position); | 67 unsigned substringLength = std::min(length, m_length - position); |
74 return m_buffer->substring(position, substringLength); | 68 return m_buffer->substring(position, substringLength); |
75 } | 69 } |
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382 if (!canShrink()) | 376 if (!canShrink()) |
383 return; | 377 return; |
384 if (m_is8Bit) | 378 if (m_is8Bit) |
385 reallocateBuffer<LChar>(m_length); | 379 reallocateBuffer<LChar>(m_length); |
386 else | 380 else |
387 reallocateBuffer<UChar>(m_length); | 381 reallocateBuffer<UChar>(m_length); |
388 m_string = m_buffer.release(); | 382 m_string = m_buffer.release(); |
389 } | 383 } |
390 | 384 |
391 } // namespace WTF | 385 } // namespace WTF |
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