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29 #ifndef StringBuffer_h
30 #define StringBuffer_h
32 #include "wtf/Assertions.h"
33 #include "wtf/text/StringImpl.h"
34 #include "wtf/unicode/Unicode.h"
38 template <typename CharType>
40 WTF_MAKE_NONCOPYABLE(StringBuffer);
44 explicit StringBuffer(unsigned length)
47 m_data = StringImpl::createUninitialized(length, characters);
54 void shrink(unsigned newLength)
56 if (m_data->length() == newLength)
58 m_data->truncateAssumingIsolated(newLength);
61 void resize(unsigned newLength)
65 m_data = StringImpl::createUninitialized(newLength, characters);
68 if (newLength > m_data->length()) {
69 m_data = StringImpl::reallocate(m_data.release(), newLength);
75 unsigned length() const { return m_data ? m_data->length() : 0; }
76 CharType* characters() { return length() ? const_cast<CharType*>(m_data->getCharacters<CharType>()) : 0; }
78 CharType& operator[](unsigned i) { ASSERT_WITH_SECURITY_IMPLICATION(i < length()); return characters()[i]; }
80 PassRefPtr<StringImpl> release() { return m_data.release(); }
83 RefPtr<StringImpl> m_data;
88 using WTF::StringBuffer;
90 #endif // StringBuffer_h