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- // -*- c-basic-offset: 2 -*-
- /*
- * This file is part of the KDE libraries
- * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
- * Copyright (C) 2003 Apple Computer, Inc.
- *
- * 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 _KJS_USTRING_H_
- #define _KJS_USTRING_H_
-
- #include "global.h"
-
- /**
- * @internal
- */
- namespace DOM {
- class DOMString;
- }
- class KJScript;
- class QString;
- class QConstString;
-
- namespace KJS {
-
- class UCharReference;
- class UString;
-
- /**
- * @short Unicode character.
- *
- * UChar represents a 16 bit Unicode character. It's internal data
- * representation is compatible to XChar2b and QChar. It's therefore
- * possible to exchange data with X and Qt with shallow copies.
- */
- struct KJS_EXPORT UChar {
- /**
- * Construct a character with uninitialized value.
- */
- UChar();
- UChar(char u);
- UChar(unsigned char u);
- /**
- * Construct a character with the value denoted by the arguments.
- * @param h higher byte
- * @param l lower byte
- */
- UChar(unsigned char h , unsigned char l);
- /**
- * Construct a character with the given value.
- * @param u 16 bit Unicode value
- */
- UChar(unsigned short u);
- UChar(const UCharReference &c);
- /**
- * @return The higher byte of the character.
- */
- unsigned char high() const { return uc >> 8; }
- /**
- * @return The lower byte of the character.
- */
- unsigned char low() const { return uc; }
- /**
- * @return the 16 bit Unicode value of the character
- */
- unsigned short unicode() const { return uc; }
- public:
- /**
- * @return The character converted to lower case.
- */
- UChar toLower() const;
- /**
- * @return The character converted to upper case.
- */
- UChar toUpper() const;
- /**
- * A static instance of UChar(0).
- */
- static UChar null;
-
- unsigned short uc;
- } KJS_PACKED;
-
- inline UChar::UChar() { }
- inline UChar::UChar(unsigned char h , unsigned char l) : uc(h << 8 | l) { }
- inline UChar::UChar(char u) : uc((unsigned char)u) { }
- inline UChar::UChar(unsigned char u) : uc(u) { }
- inline UChar::UChar(unsigned short u) : uc(u) { }
-
- /**
- * @short Dynamic reference to a string character.
- *
- * UCharReference is the dynamic counterpart of UChar. It's used when
- * characters retrieved via index from a UString are used in an
- * assignment expression (and therefore can't be treated as being const):
- * \code
- * UString s("hello world");
- * s[0] = 'H';
- * \endcode
- *
- * If that sounds confusing your best bet is to simply forget about the
- * existence of this class and treat is as being identical to UChar.
- */
- class KJS_EXPORT UCharReference {
- friend class UString;
- UCharReference(UString *s, unsigned int off) : str(s), offset(off) { }
- public:
- /**
- * Set the referenced character to c.
- */
- UCharReference& operator=(UChar c);
- /**
- * Same operator as above except the argument that it takes.
- */
- UCharReference& operator=(char c) { return operator=(UChar(c)); }
- /**
- * @return Unicode value.
- */
- unsigned short unicode() const { return ref().uc; }
- /**
- * @return Lower byte.
- */
- unsigned char low() const { return ref().uc; }
- /**
- * @return Higher byte.
- */
- unsigned char high() const { return ref().uc >> 8; }
- /**
- * @return Character converted to lower case.
- */
- UChar toLower() const { return ref().toLower(); }
- /**
- * @return Character converted to upper case.
- */
- UChar toUpper() const { return ref().toUpper(); }
- private:
- // not implemented, can only be constructed from UString
- UCharReference();
-
- UChar& ref() const;
- UString *str;
- int offset;
- };
-
- inline UChar::UChar(const UCharReference &c) : uc(c.unicode()) { }
-
- /**
- * @short 8 bit char based string class
- */
- class KJS_EXPORT CString {
- public:
- CString() : data(0L), length(0) { }
- CString(const char *c);
- CString(const char *c, int len);
- CString(const CString &);
-
- ~CString();
-
- CString &append(const CString &);
- CString &operator=(const char *c);
- CString &operator=(const CString &);
- CString &operator+=(const CString &c) { return append(c); }
-
- int size() const { return length; }
- const char *c_str() const { return data; }
- private:
- char *data;
- int length;
- };
-
- /**
- * @short Unicode string class
- */
- class KJS_EXPORT UString {
- friend bool operator==(const UString&, const UString&);
- friend class UCharReference;
- friend class Identifier;
- friend class PropertyMap;
- friend class PropertyMapHashTableEntry;
- /**
- * @internal
- */
- struct KJS_EXPORT Rep {
- friend class UString;
- friend bool operator==(const UString&, const UString&);
-
- static Rep *create(UChar *d, int l);
- void destroy();
-
- UChar *data() const { return dat; }
- int size() const { return len; }
-
- unsigned hash() const { if (_hash == 0) _hash = computeHash(dat, len); return _hash; }
-
- static unsigned computeHash(const UChar *, int length);
- static unsigned computeHash(const char *);
-
- void ref() { ++rc; }
- void deref() { if (--rc == 0) destroy(); }
-
- UChar *dat;
- int len;
- int capacity;
- int rc;
- mutable unsigned _hash;
-
- enum { capacityForIdentifier = 0x10000000 };
-
- static Rep null;
- static Rep empty;
- };
-
- public:
- /**
- * Constructs a null string.
- */
- UString();
- /**
- * Constructs a string from the single character c.
- */
- explicit UString(char c);
- /**
- * Constructs a string from a classical zero determined char string.
- */
- UString(const char *c);
- /**
- * Constructs a string from an array of Unicode characters of the specified
- * length.
- */
- UString(const UChar *c, int length);
- /**
- * If copy is false the string data will be adopted.
- * That means that the data will NOT be copied and the pointer will
- * be deleted when the UString object is modified or destroyed.
- * Behaviour defaults to a deep copy if copy is true.
- */
- UString(UChar *c, int length, bool copy);
- /**
- * Copy constructor. Makes a shallow copy only.
- */
- UString(const UString &s) { attach(s.rep); }
- /**
- * Convenience declaration only ! You'll be on your own to write the
- * implementation for a construction from QString.
- *
- * Note: feel free to contact me if you want to see a dummy header for
- * your favorite FooString class here !
- */
- UString(const QString &);
- /**
- * Convenience declaration only ! See UString(const QString&).
- */
- UString(const DOM::DOMString &);
- /**
- * Concatenation constructor. Makes operator+ more efficient.
- */
- UString(const UString &, const UString &);
- /**
- * Destructor. If this handle was the only one holding a reference to the
- * string the data will be freed.
- */
- ~UString() { release(); }
-
- /**
- * Constructs a string from an int.
- */
- static UString from(int i);
- /**
- * Constructs a string from an unsigned int.
- */
- static UString from(unsigned int u);
- /**
- * Constructs a string from a long.
- */
- static UString from(long l);
- /**
- * Constructs a string from a double.
- */
- static UString from(double d);
-
- /**
- * Append another string.
- */
- UString &append(const UString &);
-
- /**
- * @return The string converted to the 8-bit string type CString().
- */
- CString cstring() const;
- /**
- * Convert the Unicode string to plain ASCII chars chopping of any higher
- * bytes. This method should only be used for *debugging* purposes as it
- * is neither Unicode safe nor free from side effects. In order not to
- * waste any memory the char buffer is static and *shared* by all UString
- * instances.
- */
- char *ascii() const;
- /**
- * @see UString(const QString&).
- */
- DOM::DOMString string() const;
- /**
- * @see UString(const QString&).
- */
- QString qstring() const;
- /**
- * @see UString(const QString&).
- */
- QConstString qconststring() const;
-
- /**
- * Assignment operator.
- */
- UString &operator=(const char *c);
- UString &operator=(const UString &);
- /**
- * Appends the specified string.
- */
- UString &operator+=(const UString &s) { return append(s); }
-
- /**
- * @return A pointer to the internal Unicode data.
- */
- const UChar* data() const { return rep->data(); }
- /**
- * @return True if null.
- */
- bool isNull() const { return (rep == &Rep::null); }
- /**
- * @return True if null or zero length.
- */
- bool isEmpty() const { return (!rep->len); }
- /**
- * Use this if you want to make sure that this string is a plain ASCII
- * string. For example, if you don't want to lose any information when
- * using cstring() or ascii().
- *
- * @return True if the string doesn't contain any non-ASCII characters.
- */
- bool is8Bit() const;
- /**
- * @return The length of the string.
- */
- int size() const { return rep->size(); }
- /**
- * Const character at specified position.
- */
- UChar operator[](int pos) const;
- /**
- * Writable reference to character at specified position.
- */
- UCharReference operator[](int pos);
-
- /**
- * Attempts an conversion to a number. Apart from floating point numbers,
- * the algorithm will recognize hexadecimal representations (as
- * indicated by a 0x or 0X prefix) and +/- Infinity.
- * Returns NaN if the conversion failed.
- * @param tolerateTrailingJunk if true, toDouble can tolerate garbage after the number.
- * @param tolerateEmptyString if false, toDouble will turn an empty string into NaN rather than 0.
- */
- double toDouble(bool tolerateTrailingJunk, bool tolerateEmptyString) const;
- double toDouble(bool tolerateTrailingJunk) const;
- double toDouble() const;
- /**
- * Attempts an conversion to an unsigned long integer. ok will be set
- * according to the success.
- @ @param ok make this point to a bool in case you need to know whether the conversion succeeded.
- * @param tolerateEmptyString if false, toULong will return false for *ok for an empty string.
- */
- unsigned long toULong(bool *ok, bool tolerateEmptyString) const;
- unsigned long toULong(bool *ok = 0) const;
-
- unsigned int toUInt32(bool *ok = 0) const;
- unsigned int toStrictUInt32(bool *ok = 0) const;
-
- /**
- * Attempts an conversion to an array index. The "ok" boolean will be set
- * to true if it is a valid array index according to the rule from
- * ECMA 15.2 about what an array index is. It must exactly match the string
- * form of an unsigned integer, and be less than 2^32 - 1.
- */
- unsigned toArrayIndex(bool *ok = 0) const;
-
- /**
- * Returns this string converted to lower case characters
- */
- UString toLower() const;
- /**
- * Returns this string converted to upper case characters
- */
- UString toUpper() const;
- /**
- * @return Position of first occurrence of f starting at position pos.
- * -1 if the search was not successful.
- */
- int find(const UString &f, int pos = 0) const;
- int find(UChar, int pos = 0) const;
- /**
- * @return Position of first occurrence of f searching backwards from
- * position pos.
- * -1 if the search was not successful.
- */
- int rfind(const UString &f, int pos) const;
- int rfind(UChar, int pos) const;
- /**
- * @return The sub string starting at position pos and length len.
- */
- UString substr(int pos = 0, int len = -1) const;
- /**
- * Static instance of a null string.
- */
- static UString null;
- #ifdef KJS_DEBUG_MEM
- /**
- * Clear statically allocated resources.
- */
- static void globalClear();
- #endif
- private:
- UString(Rep *r) { attach(r); }
- void attach(Rep *r);
- void detach();
- void release();
- Rep *rep;
- };
-
- KJS_EXPORT inline bool operator==(const UChar &c1, const UChar &c2) {
- return (c1.uc == c2.uc);
- }
- KJS_EXPORT inline bool operator!=(const UChar& c1, const UChar& c2) {
- return !KJS::operator==(c1, c2);
- }
- KJS_EXPORT bool operator==(const UString& s1, const UString& s2);
- inline bool operator!=(const UString& s1, const UString& s2) {
- return !KJS::operator==(s1, s2);
- }
- KJS_EXPORT bool operator<(const UString& s1, const UString& s2);
- KJS_EXPORT bool operator==(const UString& s1, const char *s2);
- KJS_EXPORT inline bool operator!=(const UString& s1, const char *s2) {
- return !KJS::operator==(s1, s2);
- }
- KJS_EXPORT inline bool operator==(const char *s1, const UString& s2) {
- return operator==(s2, s1);
- }
- KJS_EXPORT inline bool operator!=(const char *s1, const UString& s2) {
- return !KJS::operator==(s1, s2);
- }
- KJS_EXPORT bool operator==(const CString& s1, const CString& s2);
- KJS_EXPORT inline bool operator!=(const CString& s1, const CString& s2) {
- return !KJS::operator==(s1, s2);
- }
- KJS_EXPORT inline UString operator+(const UString& s1, const UString& s2) {
- return UString(s1, s2);
- }
-
- KJS_EXPORT int compare(const UString &, const UString &);
-
- } // namespace
-
- #endif
-