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/*
* Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef AtomicString_h
#define AtomicString_h
#include <wtf/text/AtomicStringImpl.h>
#include <wtf/text/WTFString.h>
// Define 'NO_IMPLICIT_ATOMICSTRING' before including this header,
// to disallow (expensive) implicit String-->AtomicString conversions.
#ifdef NO_IMPLICIT_ATOMICSTRING
#define ATOMICSTRING_CONVERSION explicit
#else
#define ATOMICSTRING_CONVERSION
#endif
namespace WTF {
struct AtomicStringHash;
class AtomicString {
public:
WTF_EXPORT_PRIVATE static void init();
AtomicString() { }
AtomicString(const LChar* s) : m_string(add(s)) { }
AtomicString(const char* s) : m_string(add(s)) { }
AtomicString(const LChar* s, unsigned length) : m_string(add(s, length)) { }
AtomicString(const UChar* s, unsigned length) : m_string(add(s, length)) { }
AtomicString(const UChar* s, unsigned length, unsigned existingHash) : m_string(add(s, length, existingHash)) { }
AtomicString(const UChar* s) : m_string(add(s)) { }
ATOMICSTRING_CONVERSION AtomicString(StringImpl* imp) : m_string(add(imp)) { }
AtomicString(AtomicStringImpl* imp) : m_string(imp) { }
ATOMICSTRING_CONVERSION AtomicString(const String& s) : m_string(add(s.impl())) { }
AtomicString(StringImpl* baseString, unsigned start, unsigned length) : m_string(add(baseString, start, length)) { }
enum ConstructFromLiteralTag { ConstructFromLiteral };
AtomicString(const char* characters, unsigned length, ConstructFromLiteralTag)
: m_string(addFromLiteralData(characters, length))
{
}
template<unsigned charactersCount>
ALWAYS_INLINE AtomicString(const char (&characters)[charactersCount], ConstructFromLiteralTag)
: m_string(addFromLiteralData(characters, charactersCount - 1))
{
COMPILE_ASSERT(charactersCount > 1, AtomicStringFromLiteralNotEmpty);
COMPILE_ASSERT((charactersCount - 1 <= ((unsigned(~0) - sizeof(StringImpl)) / sizeof(LChar))), AtomicStringFromLiteralCannotOverflow);
}
#if COMPILER_SUPPORTS(CXX_RVALUE_REFERENCES)
// We have to declare the copy constructor and copy assignment operator as well, otherwise
// they'll be implicitly deleted by adding the move constructor and move assignment operator.
// FIXME: Instead of explicitly casting to String&& here, we should use std::move, but that requires us to
// have a standard library that supports move semantics.
AtomicString(const AtomicString& other) : m_string(other.m_string) { }
AtomicString(AtomicString&& other) : m_string(static_cast<String&&>(other.m_string)) { }
AtomicString& operator=(const AtomicString& other) { m_string = other.m_string; return *this; }
AtomicString& operator=(AtomicString&& other) { m_string = static_cast<String&&>(other.m_string); return *this; }
#endif
// Hash table deleted values, which are only constructed and never copied or destroyed.
AtomicString(WTF::HashTableDeletedValueType) : m_string(WTF::HashTableDeletedValue) { }
bool isHashTableDeletedValue() const { return m_string.isHashTableDeletedValue(); }
WTF_EXPORT_STRING_API static AtomicStringImpl* find(const StringImpl*);
operator const String&() const { return m_string; }
const String& string() const { return m_string; };
AtomicStringImpl* impl() const { return static_cast<AtomicStringImpl *>(m_string.impl()); }
const UChar* characters() const { return m_string.characters(); }
unsigned length() const { return m_string.length(); }
UChar operator[](unsigned int i) const { return m_string[i]; }
bool contains(UChar c) const { return m_string.contains(c); }
bool contains(const LChar* s, bool caseSensitive = true) const
{ return m_string.contains(s, caseSensitive); }
bool contains(const String& s, bool caseSensitive = true) const
{ return m_string.contains(s, caseSensitive); }
size_t find(UChar c, size_t start = 0) const { return m_string.find(c, start); }
size_t find(const LChar* s, size_t start = 0, bool caseSentitive = true) const
{ return m_string.find(s, start, caseSentitive); }
size_t find(const String& s, size_t start = 0, bool caseSentitive = true) const
{ return m_string.find(s, start, caseSentitive); }
bool startsWith(const String& s, bool caseSensitive = true) const
{ return m_string.startsWith(s, caseSensitive); }
bool startsWith(UChar character) const
{ return m_string.startsWith(character); }
template<unsigned matchLength>
bool startsWith(const char (&prefix)[matchLength], bool caseSensitive = true) const
{ return m_string.startsWith<matchLength>(prefix, caseSensitive); }
bool endsWith(const String& s, bool caseSensitive = true) const
{ return m_string.endsWith(s, caseSensitive); }
bool endsWith(UChar character) const
{ return m_string.endsWith(character); }
template<unsigned matchLength>
bool endsWith(const char (&prefix)[matchLength], bool caseSensitive = true) const
{ return m_string.endsWith<matchLength>(prefix, caseSensitive); }
WTF_EXPORT_STRING_API AtomicString lower() const;
AtomicString upper() const { return AtomicString(impl()->upper()); }
int toInt(bool* ok = 0) const { return m_string.toInt(ok); }
double toDouble(bool* ok = 0) const { return m_string.toDouble(ok); }
float toFloat(bool* ok = 0) const { return m_string.toFloat(ok); }
bool percentage(int& p) const { return m_string.percentage(p); }
bool isNull() const { return m_string.isNull(); }
bool isEmpty() const { return m_string.isEmpty(); }
static void remove(StringImpl*);
#if USE(CF)
AtomicString(CFStringRef s) : m_string(add(String(s).impl())) { }
CFStringRef createCFString() const { return m_string.createCFString(); }
#endif
#ifdef __OBJC__
AtomicString(NSString* s) : m_string(add(String(s).impl())) { }
operator NSString*() const { return m_string; }
#endif
#if PLATFORM(QT)
AtomicString(const QString& s) : m_string(add(String(s).impl())) { }
operator QString() const { return m_string; }
#endif
// AtomicString::fromUTF8 will return a null string if
// the input data contains invalid UTF-8 sequences.
static AtomicString fromUTF8(const char*, size_t);
static AtomicString fromUTF8(const char*);
#ifndef NDEBUG
void show() const;
#endif
private:
String m_string;
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> add(const LChar*);
ALWAYS_INLINE static PassRefPtr<StringImpl> add(const char* s) { return add(reinterpret_cast<const LChar*>(s)); };
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> add(const LChar*, unsigned length);
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> add(const UChar*, unsigned length);
ALWAYS_INLINE static PassRefPtr<StringImpl> add(const char* s, unsigned length) { return add(reinterpret_cast<const char*>(s), length); };
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> add(const UChar*, unsigned length, unsigned existingHash);
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> add(const UChar*);
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> add(StringImpl*, unsigned offset, unsigned length);
ALWAYS_INLINE static PassRefPtr<StringImpl> add(StringImpl* r)
{
if (!r || r->isAtomic())
return r;
return addSlowCase(r);
}
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> addFromLiteralData(const char* characters, unsigned length);
WTF_EXPORT_STRING_API static PassRefPtr<StringImpl> addSlowCase(StringImpl*);
WTF_EXPORT_STRING_API static AtomicString fromUTF8Internal(const char*, const char*);
};
inline bool operator==(const AtomicString& a, const AtomicString& b) { return a.impl() == b.impl(); }
bool operator==(const AtomicString&, const LChar*);
inline bool operator==(const AtomicString& a, const char* b) { return WTF::equal(a.impl(), reinterpret_cast<const LChar*>(b)); }
inline bool operator==(const AtomicString& a, const Vector<UChar>& b) { return a.impl() && equal(a.impl(), b.data(), b.size()); }
inline bool operator==(const AtomicString& a, const String& b) { return equal(a.impl(), b.impl()); }
inline bool operator==(const LChar* a, const AtomicString& b) { return b == a; }
inline bool operator==(const String& a, const AtomicString& b) { return equal(a.impl(), b.impl()); }
inline bool operator==(const Vector<UChar>& a, const AtomicString& b) { return b == a; }
inline bool operator!=(const AtomicString& a, const AtomicString& b) { return a.impl() != b.impl(); }
inline bool operator!=(const AtomicString& a, const LChar* b) { return !(a == b); }
inline bool operator!=(const AtomicString& a, const char* b) { return !(a == b); }
inline bool operator!=(const AtomicString& a, const String& b) { return !equal(a.impl(), b.impl()); }
inline bool operator!=(const AtomicString& a, const Vector<UChar>& b) { return !(a == b); }
inline bool operator!=(const LChar* a, const AtomicString& b) { return !(b == a); }
inline bool operator!=(const String& a, const AtomicString& b) { return !equal(a.impl(), b.impl()); }
inline bool operator!=(const Vector<UChar>& a, const AtomicString& b) { return !(a == b); }
inline bool equalIgnoringCase(const AtomicString& a, const AtomicString& b) { return equalIgnoringCase(a.impl(), b.impl()); }
inline bool equalIgnoringCase(const AtomicString& a, const LChar* b) { return equalIgnoringCase(a.impl(), b); }
inline bool equalIgnoringCase(const AtomicString& a, const char* b) { return equalIgnoringCase(a.impl(), reinterpret_cast<const LChar*>(b)); }
inline bool equalIgnoringCase(const AtomicString& a, const String& b) { return equalIgnoringCase(a.impl(), b.impl()); }
inline bool equalIgnoringCase(const LChar* a, const AtomicString& b) { return equalIgnoringCase(a, b.impl()); }
inline bool equalIgnoringCase(const char* a, const AtomicString& b) { return equalIgnoringCase(reinterpret_cast<const LChar*>(a), b.impl()); }
inline bool equalIgnoringCase(const String& a, const AtomicString& b) { return equalIgnoringCase(a.impl(), b.impl()); }
// Define external global variables for the commonly used atomic strings.
// These are only usable from the main thread.
#ifndef ATOMICSTRING_HIDE_GLOBALS
extern const WTF_EXPORTDATA AtomicString nullAtom;
extern const WTF_EXPORTDATA AtomicString emptyAtom;
extern const WTF_EXPORTDATA AtomicString textAtom;
extern const WTF_EXPORTDATA AtomicString commentAtom;
extern const WTF_EXPORTDATA AtomicString starAtom;
extern const WTF_EXPORTDATA AtomicString xmlAtom;
extern const WTF_EXPORTDATA AtomicString xmlnsAtom;
extern const WTF_EXPORTDATA AtomicString xlinkAtom;
inline AtomicString AtomicString::fromUTF8(const char* characters, size_t length)
{
if (!characters)
return nullAtom;
if (!length)
return emptyAtom;
return fromUTF8Internal(characters, characters + length);
}
inline AtomicString AtomicString::fromUTF8(const char* characters)
{
if (!characters)
return nullAtom;
if (!*characters)
return emptyAtom;
return fromUTF8Internal(characters, 0);
}
#endif
// AtomicStringHash is the default hash for AtomicString
template<typename T> struct DefaultHash;
template<> struct DefaultHash<AtomicString> {
typedef AtomicStringHash Hash;
};
} // namespace WTF
#ifndef ATOMICSTRING_HIDE_GLOBALS
using WTF::AtomicString;
using WTF::nullAtom;
using WTF::emptyAtom;
using WTF::textAtom;
using WTF::commentAtom;
using WTF::starAtom;
using WTF::xmlAtom;
using WTF::xmlnsAtom;
using WTF::xlinkAtom;
#endif
#include <wtf/text/StringConcatenate.h>
#endif // AtomicString_h
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