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| 1 /* | 1 /* |
| 2 * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserv
ed. | 2 * Copyright (C) 2003, 2006, 2008, 2009, 2010, 2012 Apple Inc. All rights reserv
ed. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
| 8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
| 9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
| 10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
| 11 * documentation and/or other materials provided with the distribution. | 11 * documentation and/or other materials provided with the distribution. |
| 12 * | 12 * |
| 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY | 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 24 */ | 24 */ |
| 25 | 25 |
| 26 | |
| 27 #include "config.h" | 26 #include "config.h" |
| 28 #include "CString.h" | 27 #include "CString.h" |
| 29 | 28 |
| 30 #include "wtf/PartitionAlloc.h" | 29 #include "wtf/PartitionAlloc.h" |
| 31 #include "wtf/Partitions.h" | 30 #include "wtf/Partitions.h" |
| 32 #include <string.h> | 31 #include <string.h> |
| 33 | 32 |
| 34 using namespace std; | 33 using namespace std; |
| 35 | 34 |
| 36 namespace WTF { | 35 namespace WTF { |
| 37 | 36 |
| 38 PassRefPtr<CStringBuffer> CStringBuffer::createUninitialized(size_t length) | 37 PassRefPtr<CStringBuffer> CStringBuffer::createUninitialized(size_t length) { |
| 39 { | 38 RELEASE_ASSERT(length < (numeric_limits<unsigned>::max() - sizeof(CStringBuffe
r))); |
| 40 RELEASE_ASSERT(length < (numeric_limits<unsigned>::max() - sizeof(CStringBuf
fer))); | |
| 41 | 39 |
| 42 // The +1 is for the terminating NUL character. | 40 // The +1 is for the terminating NUL character. |
| 43 size_t size = sizeof(CStringBuffer) + length + 1; | 41 size_t size = sizeof(CStringBuffer) + length + 1; |
| 44 CStringBuffer* stringBuffer = static_cast<CStringBuffer*>(Partitions::buffer
Malloc(size)); | 42 CStringBuffer* stringBuffer = static_cast<CStringBuffer*>(Partitions::bufferMa
lloc(size)); |
| 45 return adoptRef(new (stringBuffer) CStringBuffer(length)); | 43 return adoptRef(new (stringBuffer) CStringBuffer(length)); |
| 46 } | 44 } |
| 47 | 45 |
| 48 void CStringBuffer::operator delete(void* ptr) | 46 void CStringBuffer::operator delete(void* ptr) { |
| 49 { | 47 Partitions::bufferFree(ptr); |
| 50 Partitions::bufferFree(ptr); | |
| 51 } | 48 } |
| 52 | 49 |
| 53 CString::CString(const char* str) | 50 CString::CString(const char* str) { |
| 54 { | 51 if (!str) |
| 55 if (!str) | 52 return; |
| 56 return; | |
| 57 | 53 |
| 58 init(str, strlen(str)); | 54 init(str, strlen(str)); |
| 59 } | 55 } |
| 60 | 56 |
| 61 CString::CString(const char* str, size_t length) | 57 CString::CString(const char* str, size_t length) { |
| 62 { | 58 if (!str) { |
| 63 if (!str) { | 59 ASSERT(!length); |
| 64 ASSERT(!length); | 60 return; |
| 65 return; | 61 } |
| 66 } | |
| 67 | 62 |
| 68 init(str, length); | 63 init(str, length); |
| 69 } | 64 } |
| 70 | 65 |
| 71 void CString::init(const char* str, size_t length) | 66 void CString::init(const char* str, size_t length) { |
| 72 { | 67 ASSERT(str); |
| 73 ASSERT(str); | |
| 74 | 68 |
| 75 m_buffer = CStringBuffer::createUninitialized(length); | 69 m_buffer = CStringBuffer::createUninitialized(length); |
| 76 memcpy(m_buffer->mutableData(), str, length); | 70 memcpy(m_buffer->mutableData(), str, length); |
| 77 m_buffer->mutableData()[length] = '\0'; | 71 m_buffer->mutableData()[length] = '\0'; |
| 78 } | 72 } |
| 79 | 73 |
| 80 char* CString::mutableData() | 74 char* CString::mutableData() { |
| 81 { | 75 copyBufferIfNeeded(); |
| 82 copyBufferIfNeeded(); | 76 if (!m_buffer) |
| 83 if (!m_buffer) | 77 return 0; |
| 84 return 0; | 78 return m_buffer->mutableData(); |
| 85 return m_buffer->mutableData(); | |
| 86 } | 79 } |
| 87 | 80 |
| 88 CString CString::newUninitialized(size_t length, char*& characterBuffer) | 81 CString CString::newUninitialized(size_t length, char*& characterBuffer) { |
| 89 { | 82 CString result; |
| 90 CString result; | 83 result.m_buffer = CStringBuffer::createUninitialized(length); |
| 91 result.m_buffer = CStringBuffer::createUninitialized(length); | 84 char* bytes = result.m_buffer->mutableData(); |
| 92 char* bytes = result.m_buffer->mutableData(); | 85 bytes[length] = '\0'; |
| 93 bytes[length] = '\0'; | 86 characterBuffer = bytes; |
| 94 characterBuffer = bytes; | 87 return result; |
| 95 return result; | |
| 96 } | 88 } |
| 97 | 89 |
| 98 void CString::copyBufferIfNeeded() | 90 void CString::copyBufferIfNeeded() { |
| 99 { | 91 if (!m_buffer || m_buffer->hasOneRef()) |
| 100 if (!m_buffer || m_buffer->hasOneRef()) | 92 return; |
| 101 return; | |
| 102 | 93 |
| 103 RefPtr<CStringBuffer> buffer = m_buffer.release(); | 94 RefPtr<CStringBuffer> buffer = m_buffer.release(); |
| 104 size_t length = buffer->length(); | 95 size_t length = buffer->length(); |
| 105 m_buffer = CStringBuffer::createUninitialized(length); | 96 m_buffer = CStringBuffer::createUninitialized(length); |
| 106 memcpy(m_buffer->mutableData(), buffer->data(), length + 1); | 97 memcpy(m_buffer->mutableData(), buffer->data(), length + 1); |
| 107 } | 98 } |
| 108 | 99 |
| 109 bool CString::isSafeToSendToAnotherThread() const | 100 bool CString::isSafeToSendToAnotherThread() const { |
| 110 { | 101 return !m_buffer || m_buffer->hasOneRef(); |
| 111 return !m_buffer || m_buffer->hasOneRef(); | |
| 112 } | 102 } |
| 113 | 103 |
| 114 bool operator==(const CString& a, const CString& b) | 104 bool operator==(const CString& a, const CString& b) { |
| 115 { | 105 if (a.isNull() != b.isNull()) |
| 116 if (a.isNull() != b.isNull()) | 106 return false; |
| 117 return false; | 107 if (a.length() != b.length()) |
| 118 if (a.length() != b.length()) | 108 return false; |
| 119 return false; | 109 return !memcmp(a.data(), b.data(), a.length()); |
| 120 return !memcmp(a.data(), b.data(), a.length()); | |
| 121 } | 110 } |
| 122 | 111 |
| 123 bool operator==(const CString& a, const char* b) | 112 bool operator==(const CString& a, const char* b) { |
| 124 { | 113 if (a.isNull() != !b) |
| 125 if (a.isNull() != !b) | 114 return false; |
| 126 return false; | 115 if (!b) |
| 127 if (!b) | 116 return true; |
| 128 return true; | 117 return !strcmp(a.data(), b); |
| 129 return !strcmp(a.data(), b); | |
| 130 } | 118 } |
| 131 | 119 |
| 132 } // namespace WTF | 120 } // namespace WTF |
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