зеркало из https://github.com/mozilla/gecko-dev.git
577 строки
21 KiB
C++
577 строки
21 KiB
C++
/*****************************************************************************************************************
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*
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* This template provides the basic implementation for nsString.
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*
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* Contributor(s):
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* Rick Gessner <rickg@netscape.com>
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*
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* History:
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*
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* 02.29.2000: Original files (rickg)
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* 03.02.2000: Expand the API's to be a bit more realistic (rickg):
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* 1. Flesh out the interface to be compatible with old library
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* 2. Enable both nsString-based interfaces and nsAReadableString interfaces
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* 3. Build enough infrastructure to test nsString(s) and nsImmutableString constructions.
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* 03.03.2000: Finished mapping original nsString functionality to template form (rickg)
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*
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*****************************************************************************************************************/
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#ifndef _NS_STRING_
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#define _NS_STRING_
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#include "nsStringValue.h"
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class NS_COM nsCString;
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class NS_COM nsSubsumeStr;
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/***************************************************************************
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*
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* This is the templatized base class from which stringvalues are derived. (rickg)
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*
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***************************************************************************/
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struct UBufDescriptor {
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UBufDescriptor(PRUnichar *aBuffer,PRUint32 aLength,PRUint32 aCapacity,PRBool aOwnsBuffer) {
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mBuffer=aBuffer;
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mLength=aLength;
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mCapacity=aCapacity-1;
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mOwnsBuffer=aOwnsBuffer;
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}
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PRUnichar* mBuffer;
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PRUint32 mLength;
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PRUint32 mCapacity;
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PRBool mOwnsBuffer;
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};
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class NS_COM nsString {
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public:
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//******************************************
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// Ctor's
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//******************************************
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nsString();
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//copy constructor
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nsString(const nsString& aString,PRInt32 aLength=-1);
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//call this version for nsCString
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nsString(const nsCString& aString,PRInt32 aLength=-1);
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//call this version for prunichar*'s....
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nsString(const PRUnichar* aString,PRInt32 aLength=-1) ;
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//call this version for a single char of type char...
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nsString(const char aChar);
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//call this version for a single char of type prunichar...
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nsString(const PRUnichar aChar);
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//call this version for stack-based string buffers...
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nsString(const nsSubsumeStr &aSubsumeString);
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//call this version for stack-based string buffers...
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nsString(nsSubsumeStr &aSubsumeString);
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//call this version for char's....
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nsString(const char* aString,PRInt32 aLength=-1) ;
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//call this version for all other ABT versions of readable strings
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nsString(const nsAReadableString &aString) ;
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virtual ~nsString();
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void Reinitialize(PRUnichar* aBuffer,PRUint32 aCapacity,PRInt32 aLength=-1);
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//******************************************
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// Concat operators
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//******************************************
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nsSubsumeStr operator+(const nsString &aString);
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nsSubsumeStr operator+(const PRUnichar* aString);
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nsSubsumeStr operator+(const char* aString);
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nsSubsumeStr operator+(PRUnichar aChar);
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//******************************************
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// Assigment operators
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//******************************************
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nsString& operator=(const nsString& aString);
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nsString& operator=(const nsCString& aString);
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nsString& operator=(const nsSubsumeStr &aSubsumeString);
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nsString& operator=(const PRUnichar* aString);
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nsString& operator=(const char* aString);
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nsString& operator=(const char aChar);
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nsString& operator=(const PRUnichar aChar);
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//******************************************
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// Here are the simple accessor methods...
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//******************************************
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virtual nsresult SetLength(PRUint32 aLength) {
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if(aLength>mStringValue.mLength)
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SetCapacity(aLength);
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Truncate(aLength);
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return NS_OK;
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}
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virtual nsresult SetCapacity(PRUint32 aCapacity);
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PRUnichar* GetUnicode() const { return mStringValue.mBuffer;}
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PRUnichar operator[](PRUint32 aOffset) const {return CharAt(aOffset);}
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// operator const char* const() {return mStringValue.mBuffer;}
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PRUint32 Length() const {return mStringValue.mLength;}
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PRUint32 Capacity() const {return mStringValue.mCapacity;}
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size_t GetCharSize() const {return sizeof(char);}
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PRBool IsUnicode() const {return PRBool(sizeof(PRUnichar)==sizeof(char));}
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PRBool IsEmpty(void) const {return PRBool(mStringValue.mLength==0);}
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PRUnichar CharAt(PRUint32 anIndex) const {
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return (anIndex<mStringValue.mLength) ? mStringValue.mBuffer[anIndex] : 0;
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}
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PRBool SetCharAt(PRUnichar aChar,PRUint32 anIndex);
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PRUnichar First(void) const {
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return CharAt(0);
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}
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PRUnichar Last(void) const {
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return CharAt(mStringValue.mLength-1);
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}
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virtual void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const {
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if (aResult) {
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*aResult = sizeof(*this) + Capacity();
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}
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}
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//******************************************
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// Here are the Assignment methods,
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// and other mutators...
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//******************************************
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virtual nsresult Truncate(PRUint32 anOffset=0);
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/*
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* This method assign from a stringimpl
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* string at aString[anOffset].
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*
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* @update rickg 03.01.2000
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* @param aString -- source String to be inserted into this
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* @param aLength -- number of chars to be copied from aCopy
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* @param aSrcOffset -- insertion position within this str
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* @return this
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*/
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virtual nsresult Assign(const nsString& aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Assign(const PRUnichar* aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Assign(const char* aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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//assign from a stringValueImpl of a compatible type
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virtual nsresult Assign(const nsCString& aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Assign(const nsAReadableString &aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Assign(char aChar);
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virtual nsresult Assign(PRUnichar aChar);
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nsString& SetString(const PRUnichar* aString,PRInt32 aLength=-1) {Assign(aString, aLength); return *this;}
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nsString& SetString(const nsString& aString,PRInt32 aLength=-1) {Assign(aString, aLength); return *this;}
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//***************************************
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// Here come the append methods...
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//***************************************
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/*
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* This method appends a stringimpl starting at aString[aSrcOffset]
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*
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* @update rickg 03.01.2000
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* @param aString -- source String to be inserted into this
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* @param aLength -- number of chars to be copied from aCopy
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* @param aSrcOffset -- insertion position within this str
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* @return this
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*/
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virtual nsresult Append(const nsString &aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Append(const nsCString &aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Append(const PRUnichar* aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Append(const char* aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Append(const PRUnichar aChar) ;
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virtual nsresult Append(const char aChar);
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virtual nsresult Append(const nsAReadableString &aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
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virtual nsresult Append(PRInt32 anInteger,PRInt32 aRadix=10);
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virtual nsresult Append(float aFloat);
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//***************************************
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// Here come a few deletion methods...
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//***************************************
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nsresult Cut(PRUint32 anOffset,PRInt32 aCount);
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nsresult Trim(const char* aTrimSet,PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE,PRBool aIgnoreQuotes=PR_FALSE);
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/**
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* This method compresses multiple chars in a row into a single instance
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* You can control whether chars are yanked from ends too.
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*
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* @update rickg 03.01.2000
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* @param aEliminateLeading controls stripping of leading ws
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* @param aEliminateTrailing controls stripping of trailing ws
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* @return this
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*/
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nsresult CompressSet(const char* aSet, PRUnichar aChar,PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
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/**
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* This method strips whitespace from string.
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* You can control whether whitespace is yanked from
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* start and end of string as well.
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*
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* @update rickg 03.01.2000
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* @param aEliminateLeading controls stripping of leading ws
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* @param aEliminateTrailing controls stripping of trailing ws
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* @return this
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*/
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nsresult CompressWhitespace( PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
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//***************************************
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// Here come a wad of insert methods...
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//***************************************
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/*
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* This method inserts n chars from given string into this
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* string at str[anOffset].
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*
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* @update rickg 03.01.2000
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* @param aString -- source String to be inserted into this
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* @param anOffset -- insertion position within this str
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* @param aCount -- number of chars to be copied from aCopy
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* @return this
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*/
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nsresult Insert(const nsString& aString,PRUint32 anOffset=0,PRInt32 aCount=-1);
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nsresult Insert(const char* aString,PRUint32 anOffset=0,PRInt32 aLength=-1);
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nsresult Insert(const PRUnichar* aString,PRUint32 anOffset=0,PRInt32 aLength=-1);
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nsresult Insert(char aChar,PRUint32 anOffset=0);
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//*******************************************
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// Here come inplace replacement methods...
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//*******************************************
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/**
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* swaps occurence of 1 char for another
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*
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* @return this
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*/
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nsresult ReplaceChar(char anOldChar,char aNewChar);
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nsresult ReplaceChar(const char* aSet,char aNewChar);
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nsresult ReplaceSubstring( const nsString& aTarget,const nsString& aNewValue);
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nsresult ReplaceSubstring(const char* aTarget,const char* aNewValue);
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//*******************************************
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// Here come the stripchar methods...
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//*******************************************
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/**
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* This method is used to remove all occurances of the
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* given character from this string.
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*
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* @update rickg 03.01.2000
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* @param aChar -- char to be stripped
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* @param anOffset -- where in this string to start stripping chars
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* @return *this
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*/
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nsresult StripChar(PRUnichar aChar,PRUint32 anOffset=0);
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nsresult StripChar(PRInt32 anInt,PRUint32 anOffset=0);
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nsresult StripChars(const char* aSet,PRInt32 aLength=-1);
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nsresult StripWhitespace();
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//**************************************************
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// Here are some methods that extract substrings...
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//**************************************************
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nsresult Left(nsString& aCopy,PRInt32 aCount) const;
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nsresult Mid(nsString& aCopy,PRUint32 anOffset,PRInt32 aCount) const;
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nsresult Right(nsString& aCopy,PRInt32 aCount) const;
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//*******************************************
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// Here come the operator+=() methods...
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//*******************************************
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nsString& operator+=(const nsString& aString);
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nsString& operator+=(const char* aString);
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nsString& operator+=(const PRUnichar* aString);
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nsString& operator+=(const char aChar);
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nsString& operator+=(const PRUnichar aChar);
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nsString& operator+=(const int anInt);
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nsString& operator+=(const nsSubsumeStr &aSubsumeString) {
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//XXX NOT IMPLEMENTED
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return *this;
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}
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/***********************************
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Comparison methods...
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***********************************/
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PRBool operator==(const nsString& aString) const {return Equals(aString);}
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PRBool operator==(const nsCString& aString) const {return Equals(aString);}
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PRBool operator==(const char* aString) const {return Equals(aString);}
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PRBool operator==(char* aString) const {return Equals(aString);}
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PRBool operator==(const PRUnichar* aString) const {return Equals(aString);}
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PRBool operator==(PRUnichar* aString) const {return Equals(aString);}
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PRBool operator!=(const nsString& aString) const {return PRBool(Compare(aString)!=0);}
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PRBool operator!=(const nsCString& aString) const {return PRBool(Compare(aString)!=0);}
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PRBool operator!=(const char* aString) const {return PRBool(Compare(aString)!=0);}
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PRBool operator!=(const PRUnichar* aString) const {return PRBool(Compare(aString)!=0);}
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PRBool operator<(const nsString& aString) const {return PRBool(Compare(aString)<0);}
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PRBool operator<(const nsCString& aString) const {return PRBool(Compare(aString)<0);}
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PRBool operator<(const char* aString) const {return PRBool(Compare(aString)<0);}
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PRBool operator<(const PRUnichar* aString) const {return PRBool(Compare(aString)<0);}
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PRBool operator>(const nsString& aString) const {return PRBool(Compare(aString)>0);}
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PRBool operator>(const nsCString& aString) const {return PRBool(Compare(aString)>0);}
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PRBool operator>(const char* aString) const {return PRBool(Compare(aString)>0);}
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PRBool operator>(const PRUnichar* aString) const {return PRBool(Compare(aString)>0);}
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PRBool operator<=(const nsString& aString) const {return PRBool(Compare(aString)<=0);}
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PRBool operator<=(const nsCString& aString) const {return PRBool(Compare(aString)<=0);}
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PRBool operator<=(const char* aString) const {return PRBool(Compare(aString)<=0);}
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PRBool operator<=(const PRUnichar* aString) const {return PRBool(Compare(aString)<=0);}
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PRBool operator>=(const nsString& aString) const {return PRBool(Compare(aString)>=0);}
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PRBool operator>=(const nsCString& aString) const {return PRBool(Compare(aString)>=0);}
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PRBool operator>=(const char* aString) const {return PRBool(Compare(aString)>=0);}
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PRBool operator>=(const PRUnichar* aString) const {return PRBool(Compare(aString)>=0);}
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PRInt32 Compare(const nsString &aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRInt32 Compare(const nsCString &aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRInt32 Compare(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRInt32 Compare(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const ;
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PRBool Equals(const nsString &aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool Equals(const nsCString &aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool Equals(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool Equals(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool Equals(/*FIX: const */nsIAtom* anAtom,PRBool aIgnoreCase) const;
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PRBool Equals(const PRUnichar* aLHS,const PRUnichar* aRHS,PRBool aIgnoreCase=PR_FALSE) const;
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PRBool EqualsIgnoreCase(const nsString &aString) const {return Equals(aString,PR_TRUE);}
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PRBool EqualsIgnoreCase(const nsCString &aString) const {return Equals(aString,PR_TRUE);}
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PRBool EqualsIgnoreCase(const char* aString,PRInt32 aCount=-1) const {return Equals(aString,PR_TRUE,aCount);}
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PRBool EqualsIgnoreCase(const PRUnichar* aString,PRInt32 aCount=-1) const {return Equals(aString,PR_TRUE,aCount);}
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PRBool EqualsIgnoreCase(const PRUnichar* aLHS, const PRUnichar* aRHS) const {return Equals(aLHS,aRHS,PR_TRUE);}
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PRBool EqualsIgnoreCase(/*FIX: const */nsIAtom *aAtom) const {return Equals(aAtom,PR_TRUE);}
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/***************************************
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These are string searching methods...
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***************************************/
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/**
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* search for given string within this string
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*
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* @update rickg 03.01.2000
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* @param aString - substr to be found
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* @param aIgnoreCase tells us whether or not to do caseless compare
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* @param anOffset tells us where in this string to start searching
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* @param aRepCount tells us how many iterations to make starting at the given offset
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* @return offset in string, or -1 (kNotFound)
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*/
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PRInt32 Find(const nsString& aTarget,PRBool aIgnoreCase=PR_FALSE,PRUint32 anOffset=0,PRInt32 aRepCount=-1) const;
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PRInt32 Find(const nsCString &aString,PRBool aIgnoreCase=PR_FALSE,PRUint32 anOffset=0,PRInt32 aRepCount=-1) const;
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PRInt32 Find(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRUint32 anOffset=0,PRInt32 aRepCount=-1) const;
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PRInt32 Find(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRUint32 anOffset=0,PRInt32 aRepCount=-1) const;
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PRInt32 FindChar(char aChar,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=0,PRInt32 aRepCount=-1) const ;
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PRInt32 FindCharInSet(const nsString& aString,PRUint32 anOffset=0) const;
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PRInt32 FindCharInSet(const char *aString,PRUint32 anOffset=0) const;
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PRInt32 FindCharInSet(const PRUnichar *aString,PRUint32 anOffset=0) const;
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PRInt32 RFind(const nsString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aRepCount=-1) const;
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PRInt32 RFind(const nsCString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aRepCount=-1) const;
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PRInt32 RFind(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aRepCount=-1) const;
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PRInt32 RFind(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aRepCount=-1) const;
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PRInt32 RFindChar(char aChar,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aRepCount=-1) const;
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PRInt32 RFindCharInSet(const nsString& aString,PRInt32 anOffset=-1) const ;
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PRInt32 RFindCharInSet(const PRUnichar* aString,PRInt32 anOffset=-1) const;
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PRInt32 RFindCharInSet(const char* aString,PRInt32 anOffset=-1) const;
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/***************************************
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These convert to a different type
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***************************************/
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static void Recycle(nsString* aString);
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static nsString* CreateString(void);
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nsString* ToNewString() const;
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char* ToNewCString() const;
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char* ToNewUTF8String() const;
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|
PRUnichar* ToNewUnicode() const;
|
|
|
|
char* ToCString(char* aBuf,PRUint32 aBufLength,PRUint32 anOffset=0) const;
|
|
|
|
|
|
//******************************************
|
|
// Utility methods
|
|
//******************************************
|
|
|
|
PRInt32 CountChar(PRUnichar aChar);
|
|
|
|
//This will not work correctly for any unicode set other than ascii
|
|
void DebugDump(void) const;
|
|
|
|
/**
|
|
* Perform string to float conversion.
|
|
* @param aErrorCode will contain error if one occurs
|
|
* @return float rep of string value
|
|
*/
|
|
float ToFloat(PRInt32* aErrorCode) const;
|
|
|
|
/**
|
|
* Perform string to int conversion.
|
|
* @param aErrorCode will contain error if one occurs
|
|
* @param aRadix tells us which radix to assume; kAutoDetect tells us to determine the radix for you.
|
|
* @return int rep of string value, and possible (out) error code
|
|
*/
|
|
PRInt32 ToInteger(PRInt32* anErrorCode,PRUint32 aRadix=kAutoDetect) const;
|
|
|
|
void ToLowerCase();
|
|
|
|
void ToLowerCase(nsString &aString) const;
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|
|
|
void ToUpperCase();
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|
|
|
void ToUpperCase(nsString &aString) const;
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|
|
|
|
|
protected:
|
|
|
|
nsresult Append(const nsStringValueImpl<char> &aString,PRInt32 aLength=-1,PRUint32 aSrcOffset=0);
|
|
|
|
nsStringValueImpl<PRUnichar> mStringValue;
|
|
|
|
friend class nsCString;
|
|
friend class nsSubsumeStr;
|
|
};
|
|
|
|
|
|
|
|
class NS_COM nsSubsumeStr : public nsString {
|
|
public:
|
|
nsSubsumeStr(nsString& aString);
|
|
nsSubsumeStr(PRUnichar* aString,PRBool assumeOwnership,PRInt32 aLength=-1);
|
|
|
|
PRBool mOwnsBuffer;
|
|
};
|
|
|
|
|
|
/*****************************************************************
|
|
Now we declare the nsAutoString class
|
|
*****************************************************************/
|
|
|
|
|
|
class NS_COM nsAutoString : public nsString {
|
|
public:
|
|
|
|
nsAutoString();
|
|
|
|
//call this version nsAutoString derivatives...
|
|
nsAutoString(const nsAutoString& aString,PRInt32 aLength=-1);
|
|
|
|
//call this version for nsString and the autostrings
|
|
nsAutoString(const nsString& aString,PRInt32 aLength=-1);
|
|
|
|
//call this version with nsCString (start of COW)
|
|
nsAutoString(const nsCString& aString);
|
|
|
|
//call this version for char*'s....
|
|
nsAutoString(const char* aString,PRInt32 aLength=-1);
|
|
|
|
//call this version for a single char of type char...
|
|
nsAutoString(PRUnichar aChar);
|
|
nsAutoString(char aChar);
|
|
|
|
//call this version for PRUnichar*'s....
|
|
nsAutoString(const PRUnichar* aString,PRInt32 aLength=-1);
|
|
|
|
//call this version for all other ABT versions of readable strings
|
|
nsAutoString(const nsAReadableString &aString);
|
|
|
|
nsAutoString(const UBufDescriptor &aBuffer) ;
|
|
|
|
nsAutoString(const nsSubsumeStr& aSubsumeStringX) ;
|
|
|
|
virtual ~nsAutoString();
|
|
|
|
|
|
nsAutoString& operator=(const nsAutoString& aCopy);
|
|
nsAutoString& operator=(const nsString& aString);
|
|
nsAutoString& operator=(const nsCString& aString);
|
|
nsAutoString& operator=(const PRUnichar* aString);
|
|
nsAutoString& operator=(const char* aString) ;
|
|
nsAutoString& operator=(const PRUnichar aChar);
|
|
nsAutoString& operator=(const nsSubsumeStr &aSubsumeString);
|
|
|
|
|
|
protected:
|
|
PRUnichar mInternalBuffer[kDefaultStringSize+1];
|
|
|
|
};
|
|
|
|
extern NS_COM int fputs(const nsString& aString, FILE* out);
|
|
|
|
extern PRUint32 HashCode(const nsString& aDest);
|
|
|
|
extern NS_COM void Recycle( PRUnichar* aBuffer);
|
|
|
|
|
|
#endif
|