Imported WebKit commit 7e538425aa020340619e927792f3d895061fb54b (http://svn.webkit.org/repository/webkit/trunk@116286)

1 files changed, 104 insertions, 0 deletions

diff --git a/Source/WTF/wtf/text/CString.cpp b/Source/WTF/wtf/text/CString.cpp
new file mode 100644
index 000000000..981d77a1d
--- /dev/null
+++ b/Source/WTF/wtf/text/CString.cpp
@@ -0,0 +1,104 @@
+/*
+ * Copyright (C) 2003, 2006, 2008, 2009, 2010 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+
+#include "config.h"
+#include "CString.h"
+
+using namespace std;
+
+namespace WTF {
+
+CString::CString(const char* str)
+{
+    if (!str)
+        return;
+
+    init(str, strlen(str));
+}
+
+CString::CString(const char* str, size_t length)
+{
+    init(str, length);
+}
+
+void CString::init(const char* str, size_t length)
+{
+    if (!str)
+        return;
+
+    // We need to be sure we can add 1 to length without overflowing.
+    // Since the passed-in length is the length of an actual existing
+    // string, and we know the string doesn't occupy the entire address
+    // space, we can assert here and there's no need for a runtime check.
+    ASSERT(length < numeric_limits<size_t>::max());
+
+    m_buffer = CStringBuffer::create(length + 1);
+    memcpy(m_buffer->mutableData(), str, length); 
+    m_buffer->mutableData()[length] = '\0';
+}
+
+char* CString::mutableData()
+{
+    copyBufferIfNeeded();
+    if (!m_buffer)
+        return 0;
+    return m_buffer->mutableData();
+}
+    
+CString CString::newUninitialized(size_t length, char*& characterBuffer)
+{
+    if (length >= numeric_limits<size_t>::max())
+        CRASH();
+
+    CString result;
+    result.m_buffer = CStringBuffer::create(length + 1);
+    char* bytes = result.m_buffer->mutableData();
+    bytes[length] = '\0';
+    characterBuffer = bytes;
+    return result;
+}
+
+void CString::copyBufferIfNeeded()
+{
+    if (!m_buffer || m_buffer->hasOneRef())
+        return;
+
+    RefPtr<CStringBuffer> buffer = m_buffer.release();
+    size_t length = buffer->length();
+    m_buffer = CStringBuffer::create(length);
+    memcpy(m_buffer->mutableData(), buffer->data(), length);
+}
+
+bool operator==(const CString& a, const CString& b)
+{
+    if (a.isNull() != b.isNull())
+        return false;
+    if (a.length() != b.length())
+        return false;
+    return !strncmp(a.data(), b.data(), min(a.length(), b.length()));
+}
+
+} // namespace WTF