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pjs/string/obsolete/nsString2.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/***********************************************************************
GENERAL STRING ISSUES:
1. nsStrings and nsAutoString are always null terminated.
2. If you try to set a null char (via SetChar()) a new length is set
3. nsCStrings can be upsampled into nsString without data loss
4. Char searching is faster than string searching. Use char interfaces
if your needs will allow it.
5. It's easy to use the stack for nsAutostring buffer storage (fast too!).
See the CBufDescriptor class in nsStr.h
6. It's ONLY ok to provide non-null-terminated buffers to Append() and Insert()
provided you specify a 0<n value for the optional count argument.
7. Downsampling from nsString to nsCString is lossy -- don't do it!
***********************************************************************/
/***********************************************************************
MODULE NOTES:
This version of the nsString class offers many improvements over the
original version:
1. Wide and narrow chars
2. Allocators
3. Much smarter autostrings
4. Subsumable strings
5. Memory pools and recycling
***********************************************************************/
#ifndef _nsString_
#define _nsString_
#include "prtypes.h"
#include "nscore.h"
#include <stdio.h>
#include "nsCRT.h"
#include "nsString.h"
#include "nsIAtom.h"
#include "nsStr.h"
class nsISizeOfHandler;
#define nsString2 nsString
#define nsAutoString2 nsAutoString
class NS_COM nsSubsumeStr;
class NS_COM nsString : public nsStr {
public:
/**
* Default constructor. Note that we actually allocate a small buffer
* to begin with. This is because the "philosophy" of the string class
* was to allow developers direct access to the underlying buffer for
* performance reasons.
*/
nsString(eCharSize aCharSize=kDefaultCharSize,nsIMemoryAgent* anAgent=0);
/**
* This constructor accepts an isolatin string
* @param aCString is a ptr to a 1-byte cstr
*/
nsString(const char* aCString,eCharSize aCharSize=kDefaultCharSize,nsIMemoryAgent* anAgent=0);
/**
* This constructor accepts a unichar string
* @param aCString is a ptr to a 2-byte cstr
*/
nsString(const PRUnichar* aString,eCharSize aCharSize=kDefaultCharSize,nsIMemoryAgent* anAgent=0);
/**
* This is a copy constructor that accepts an nsStr
* @param reference to another nsString
*/
nsString(const nsStr&,eCharSize aCharSize=kDefaultCharSize,nsIMemoryAgent* anAgent=0);
/**
* This is our copy constructor
* @param reference to another nsString
*/
nsString(const nsString& aString);
/**
* This constructor takes a subsumestr
* @param reference to subsumestr
*/
nsString(nsSubsumeStr& aSubsumeStr);
/**
* Destructor
*
*/
virtual ~nsString();
/**
* Retrieve the length of this string
* @return string length
*/
inline PRInt32 Length() const { return (PRInt32)mLength; }
/**
* Retrieve the size of this string
* @return string length
*/
virtual void SizeOf(nsISizeOfHandler* aHandler) const;
/**
* Call this method if you want to force a different string length
* @update gess7/30/98
* @param aLength -- contains new length for mStr
* @return
*/
void SetLength(PRUint32 aLength) {
Truncate(aLength);
}
/**
* Sets the new length of the string.
* @param aLength is new string length.
* @return nada
*/
void SetCapacity(PRUint32 aLength);
/**
* This method truncates this string to given length.
*
* @param anIndex -- new length of string
* @return nada
*/
void Truncate(PRInt32 anIndex=0);
/**
* Determine whether or not the characters in this
* string are in sorted order.
*
* @return TRUE if ordered.
*/
PRBool IsOrdered(void) const;
/**
* Determine whether or not the characters in this
* string are in store as 1 or 2 byte (unicode) strings.
*
* @return TRUE if ordered.
*/
PRBool IsUnicode(void) const {
PRBool result=PRBool(mCharSize==eTwoByte);
return result;
}
/**
* Determine whether or not this string has a length of 0
*
* @return TRUE if empty.
*/
PRBool IsEmpty(void) const {
return PRBool(0==mLength);
}
/**********************************************************************
Getters/Setters...
*********************************************************************/
const char* GetBuffer(void) const;
const PRUnichar* GetUnicode(void) const;
/**
* Get nth character.
*/
PRUnichar operator[](PRUint32 anIndex) const;
PRUnichar CharAt(PRUint32 anIndex) const;
PRUnichar First(void) const;
PRUnichar Last(void) const;
/**
* Set nth character.
*/
PRBool SetCharAt(PRUnichar aChar,PRUint32 anIndex);
/**********************************************************************
String concatenation methods...
*********************************************************************/
/**
* Create a new string by appending given string to this
* @param aString -- 2nd string to be appended
* @return new string
*/
nsSubsumeStr operator+(const nsStr& aString);
nsSubsumeStr operator+(const nsString& aString);
/**
* create a new string by adding this to the given buffer.
* @param aCString is a ptr to cstring to be added to this
* @return newly created string
*/
nsSubsumeStr operator+(const char* aCString);
/**
* create a new string by adding this to the given wide buffer.
* @param aString is a ptr to UC-string to be added to this
* @return newly created string
*/
nsSubsumeStr operator+(const PRUnichar* aString);
/**
* create a new string by adding this to the given char.
* @param aChar is a char to be added to this
* @return newly created string
*/
nsSubsumeStr operator+(char aChar);
/**
* create a new string by adding this to the given char.
* @param aChar is a unichar to be added to this
* @return newly created string
*/
nsSubsumeStr operator+(PRUnichar aChar);
/**********************************************************************
Lexomorphic transforms...
*********************************************************************/
/**
* Converts chars in this to lowercase
* @update gess 7/27/98
*/
void ToLowerCase();
/**
* Converts chars in this to lowercase, and
* stores them in aOut
* @update gess 7/27/98
* @param aOut is a string to contain result
*/
void ToLowerCase(nsString& aString) const;
/**
* Converts chars in this to uppercase
* @update gess 7/27/98
*/
void ToUpperCase();
/**
* Converts chars in this to lowercase, and
* stores them in a given output string
* @update gess 7/27/98
* @param aOut is a string to contain result
*/
void ToUpperCase(nsString& aString) const;
/**
* This method is used to remove all occurances of the
* characters found in aSet from this string.
*
* @param aSet -- characters to be cut from this
* @return *this
*/
nsString& StripChars(const char* aSet);
nsString& StripChar(PRUnichar aChar);
/**
* This method strips whitespace throughout the string
*
* @return this
*/
nsString& StripWhitespace();
/**
* swaps occurence of 1 string for another
*
* @return this
*/
nsString& ReplaceChar(PRUnichar anOldChar,PRUnichar aNewChar);
nsString& ReplaceChar(const char* aSet,PRUnichar aNewChar);
PRInt32 CountChar(PRUnichar aChar);
/**
* This method trims characters found in aTrimSet from
* either end of the underlying string.
*
* @param aTrimSet -- contains chars to be trimmed from
* both ends
* @return this
*/
nsString& Trim(const char* aSet,PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
/**
* This method strips whitespace from string.
* You can control whether whitespace is yanked from
* start and end of string as well.
*
* @param aEliminateLeading controls stripping of leading ws
* @param aEliminateTrailing controls stripping of trailing ws
* @return this
*/
nsString& CompressSet(const char* aSet, PRUnichar aChar,PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
/**
* This method strips whitespace from string.
* You can control whether whitespace is yanked from
* start and end of string as well.
*
* @param aEliminateLeading controls stripping of leading ws
* @param aEliminateTrailing controls stripping of trailing ws
* @return this
*/
nsString& CompressWhitespace( PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
/**********************************************************************
string conversion methods...
*********************************************************************/
/**
* This method constructs a new nsString on the stack that is a copy
* of this string.
*
*/
nsString* ToNewString() const;
/**
* Creates an ISOLatin1 clone of this string
* @return ptr to new isolatin1 string
*/
char* ToNewCString() const;
/**
* Creates a unicode clone of this string
* @return ptr to new unicode string
*/
PRUnichar* ToNewUnicode() const;
/**
* Copies data from internal buffer onto given char* buffer
* @param aBuf is the buffer where data is stored
* @param aBuflength is the max # of chars to move to buffer
* @return ptr to given buffer
*/
char* ToCString(char* aBuf,PRUint32 aBufLength,PRUint32 anOffset=0) 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;
/**
* Try to derive the radix from the value contained in this string
* @return kRadix10, kRadix16 or kAutoDetect (meaning unknown)
*/
PRUint32 DetermineRadix(void);
/**
* Perform string to int conversion.
* @param aErrorCode will contain error if one occurs
* @return int rep of string value
*/
PRInt32 ToInteger(PRInt32* aErrorCode,PRUint32 aRadix=kRadix10) const;
/**********************************************************************
String manipulation methods...
*********************************************************************/
/**
* Functionally equivalent to assign or operator=
*
*/
nsString& SetString(const char* aString,PRInt32 aLength=-1) {return Assign(aString,aLength);}
nsString& SetString(const PRUnichar* aString,PRInt32 aLength=-1) {return Assign(aString,aLength);}
nsString& SetString(const nsString& aString,PRInt32 aLength=-1) {return Assign(aString,aLength);}
/**
* assign given string to this string
* @param aStr: buffer to be assigned to this
* @param alength is the length of the given str (or -1)
if you want me to determine its length
* @return this
*/
nsString& Assign(const nsStr& aString,PRInt32 aCount=-1);
nsString& Assign(const char* aString,PRInt32 aCount=-1);
nsString& Assign(const PRUnichar* aString,PRInt32 aCount=-1);
nsString& Assign(char aChar);
nsString& Assign(PRUnichar aChar);
/**
* here come a bunch of assignment operators...
* @param aString: string to be added to this
* @return this
*/
nsString& operator=(const nsString& aString) {return Assign(aString);}
nsString& operator=(const nsStr& aString) {return Assign(aString);}
nsString& operator=(char aChar) {return Assign(aChar);}
nsString& operator=(PRUnichar aChar) {return Assign(aChar);}
nsString& operator=(const char* aCString) {return Assign(aCString);}
nsString& operator=(const PRUnichar* aString) {return Assign(aString);}
#ifdef AIX
nsString& operator=(const nsSubsumeStr& aSubsumeString); // AIX requires a const here
#else
nsString& operator=(nsSubsumeStr& aSubsumeString);
#endif
/**
* Here's a bunch of append mehtods for varying types...
* @param aString : string to be appended to this
* @return this
*/
nsString& operator+=(const nsStr& aString){return Append(aString,aString.mLength);}
nsString& operator+=(const nsString& aString){return Append(aString,aString.mLength);}
nsString& operator+=(const char* aCString) {return Append(aCString);}
//nsString& operator+=(char aChar){return Append(aChar);}
nsString& operator+=(const PRUnichar* aUCString) {return Append(aUCString);}
nsString& operator+=(PRUnichar aChar){return Append(aChar);}
/*
* Appends n characters from given string to this,
* This version computes the length of your given string
*
* @param aString is the source to be appended to this
* @return number of chars copied
*/
nsString& Append(const nsStr& aString) {return Append(aString,aString.mLength);}
nsString& Append(const nsString& aString) {return Append(aString,aString.mLength);}
/*
* Appends n characters from given string to this,
*
* @param aString is the source to be appended to this
* @param aCount -- number of chars to copy; -1 tells us to compute the strlen for you
* @return number of chars copied
*/
nsString& Append(const nsStr& aString,PRInt32 aCount);
nsString& Append(const nsString& aString,PRInt32 aCount);
nsString& Append(const char* aString,PRInt32 aCount=-1);
nsString& Append(const PRUnichar* aString,PRInt32 aCount=-1);
nsString& Append(char aChar);
nsString& Append(PRUnichar aChar);
nsString& Append(PRInt32 aInteger,PRInt32 aRadix=10); //radix=8,10 or 16
nsString& Append(float aFloat);
/*
* Copies n characters from this string to given string,
* starting at the leftmost offset.
*
*
* @param aCopy -- Receiving string
* @param aCount -- number of chars to copy
* @return number of chars copied
*/
PRUint32 Left(nsString& aCopy,PRInt32 aCount) const;
/*
* Copies n characters from this string to given string,
* starting at the given offset.
*
*
* @param aCopy -- Receiving string
* @param aCount -- number of chars to copy
* @param anOffset -- position where copying begins
* @return number of chars copied
*/
PRUint32 Mid(nsString& aCopy,PRUint32 anOffset,PRInt32 aCount) const;
/*
* Copies n characters from this string to given string,
* starting at rightmost char.
*
*
* @param aCopy -- Receiving string
* @param aCount -- number of chars to copy
* @return number of chars copied
*/
PRUint32 Right(nsString& aCopy,PRInt32 aCount) const;
/*
* This method inserts n chars from given string into this
* string at str[anOffset].
*
* @param aCopy -- String to be inserted into this
* @param anOffset -- insertion position within this str
* @param aCount -- number of chars to be copied from aCopy
* @return number of chars inserted into this.
*/
nsString& Insert(const nsString& aCopy,PRUint32 anOffset,PRInt32 aCount=-1);
/**
* Insert a given string into this string at
* a specified offset.
*
* @param aString* to be inserted into this string
* @param anOffset is insert pos in str
* @return the number of chars inserted into this string
*/
nsString& Insert(const char* aChar,PRUint32 anOffset,PRInt32 aCount=-1);
nsString& Insert(const PRUnichar* aChar,PRUint32 anOffset,PRInt32 aCount=-1);
/**
* Insert a single char into this string at
* a specified offset.
*
* @param character to be inserted into this string
* @param anOffset is insert pos in str
* @return the number of chars inserted into this string
*/
//nsString& Insert(char aChar,PRUint32 anOffset);
nsString& Insert(PRUnichar aChar,PRUint32 anOffset);
/*
* This method is used to cut characters in this string
* starting at anOffset, continuing for aCount chars.
*
* @param anOffset -- start pos for cut operation
* @param aCount -- number of chars to be cut
* @return *this
*/
nsString& Cut(PRUint32 anOffset,PRInt32 aCount);
/**********************************************************************
Searching methods...
*********************************************************************/
/**
* Search for given character within this string.
* This method does so by using a binary search,
* so your string HAD BETTER BE ORDERED!
*
* @param aChar is the unicode char to be found
* @return offset in string, or -1 (kNotFound)
*/
PRInt32 BinarySearch(PRUnichar aChar) const;
/**
* Search for given substring within this string
*
* @param aString is substring to be sought in this
* @return offset in string, or -1 (kNotFound)
*/
PRInt32 Find(const nsString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
PRInt32 Find(const nsStr& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
PRInt32 Find(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
PRInt32 Find(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
/**
* Search for given char within this string
*
* @param aString is substring to be sought in this
* @param anOffset tells us where in this strig to start searching
* @param aIgnoreCase selects case sensitivity
* @return find pos in string, or -1 (kNotFound)
*/
PRInt32 Find(PRUnichar aChar,PRInt32 offset=-1,PRBool aIgnoreCase=PR_FALSE) const;
PRInt32 FindChar(PRUnichar aChar,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
/**
* This method searches this string for the first character
* found in the given string
* @param aString contains set of chars to be found
* @param anOffset tells us where to start searching in this
* @return -1 if not found, else the offset in this
*/
PRInt32 FindCharInSet(const char* aString,PRInt32 anOffset=-1) const;
PRInt32 FindCharInSet(const PRUnichar* aString,PRInt32 anOffset=-1) const;
PRInt32 FindCharInSet(const nsStr& aString,PRInt32 anOffset=-1) const;
/**
* This methods scans the string backwards, looking for the given string
* @param aString is substring to be sought in this
* @param aIgnoreCase tells us whether or not to do caseless compare
* @param anOffset tells us where in this strig to start searching (counting from left)
*/
PRInt32 RFind(const char* aCString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
PRInt32 RFind(const nsString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
PRInt32 RFind(const nsStr& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
PRInt32 RFind(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
/**
* Search for given char within this string
*
* @param aString is substring to be sought in this
* @param anOffset tells us where in this strig to start searching (counting from left)
* @param aIgnoreCase selects case sensitivity
* @return find pos in string, or -1 (kNotFound)
*/
PRInt32 RFind(PRUnichar aChar,PRInt32 offset=-1,PRBool aIgnoreCase=PR_FALSE) const;
PRInt32 RFindChar(PRUnichar aChar,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1) const;
/**
* This method searches this string for the last character
* found in the given string
* @param aString contains set of chars to be found
* @param anOffset tells us where in this strig to start searching (counting from left)
* @return -1 if not found, else the offset in this
*/
PRInt32 RFindCharInSet(const char* aString,PRInt32 anOffset=-1) const;
PRInt32 RFindCharInSet(const PRUnichar* aString,PRInt32 anOffset=-1) const;
PRInt32 RFindCharInSet(const nsStr& aString,PRInt32 anOffset=-1) const;
/**********************************************************************
Comparison methods...
*********************************************************************/
/**
* Compares a given string type to this string.
* @update gess 7/27/98
* @param S is the string to be compared
* @param aIgnoreCase tells us how to treat case
* @param aCount tells us how many chars to compare
* @return -1,0,1
*/
virtual PRInt32 Compare(const nsString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
virtual PRInt32 Compare(const nsStr &aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
virtual PRInt32 Compare(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
virtual PRInt32 Compare(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
/**
* These methods compare a given string type to this one
* @param aString is the string to be compared to this
* @return TRUE or FALSE
*/
PRBool operator==(const nsString &aString) const;
PRBool operator==(const nsStr &aString) const;
PRBool operator==(const char *aString) const;
PRBool operator==(const PRUnichar* aString) const;
/**
* These methods perform a !compare of a given string type to this
* @param aString is the string to be compared to this
* @return TRUE
*/
PRBool operator!=(const nsString &aString) const;
PRBool operator!=(const nsStr &aString) const;
PRBool operator!=(const char* aString) const;
PRBool operator!=(const PRUnichar* aString) const;
/**
* These methods test if a given string is < than this
* @param aString is the string to be compared to this
* @return TRUE or FALSE
*/
PRBool operator<(const nsString &aString) const;
PRBool operator<(const nsStr &aString) const;
PRBool operator<(const char* aString) const;
PRBool operator<(const PRUnichar* aString) const;
/**
* These methods test if a given string is > than this
* @param aString is the string to be compared to this
* @return TRUE or FALSE
*/
PRBool operator>(const nsString &aString) const;
PRBool operator>(const nsStr &S) const;
PRBool operator>(const char* aString) const;
PRBool operator>(const PRUnichar* aString) const;
/**
* These methods test if a given string is <= than this
* @param aString is the string to be compared to this
* @return TRUE or FALSE
*/
PRBool operator<=(const nsString &aString) const;
PRBool operator<=(const nsStr &S) const;
PRBool operator<=(const char* aString) const;
PRBool operator<=(const PRUnichar* aString) const;
/**
* These methods test if a given string is >= than this
* @param aString is the string to be compared to this
* @return TRUE or FALSE
*/
PRBool operator>=(const nsString &aString) const;
PRBool operator>=(const nsStr &S) const;
PRBool operator>=(const char* aString) const;
PRBool operator>=(const PRUnichar* aString) const;
/**
* Compare this to given string; note that we compare full strings here.
* The optional length argument just lets us know how long the given string is.
* If you provide a length, it is compared to length of this string as an
* optimization.
*
* @param aString -- the string to compare to this
* @param aCount -- number of chars to be compared.
* @return TRUE if equal
*/
PRBool Equals(const nsString &aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
PRBool Equals(const nsStr& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
PRBool Equals(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
PRBool Equals(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
PRBool Equals(const nsIAtom* anAtom,PRBool aIgnoreCase) const;
PRBool Equals(const PRUnichar* s1, const PRUnichar* s2,PRBool aIgnoreCase=PR_FALSE) const;
PRBool EqualsIgnoreCase(const nsString& aString) const;
PRBool EqualsIgnoreCase(const char* aString,PRInt32 aCount=-1) const;
PRBool EqualsIgnoreCase(const nsIAtom *aAtom) const;
PRBool EqualsIgnoreCase(const PRUnichar* s1, const PRUnichar* s2) const;
/**
* Determine if given buffer is plain ascii
*
* @param aBuffer -- if null, then we test *this, otherwise we test given buffer
* @return TRUE if is all ascii chars or if strlen==0
*/
PRBool IsASCII(const PRUnichar* aBuffer=0);
/**
* Determine if given char is a valid space character
*
* @param aChar is character to be tested
* @return TRUE if is valid space char
*/
static PRBool IsSpace(PRUnichar ch);
/**
* Determine if given char in valid alpha range
*
* @param aChar is character to be tested
* @return TRUE if in alpha range
*/
static PRBool IsAlpha(PRUnichar ch);
/**
* Determine if given char is valid digit
*
* @param aChar is character to be tested
* @return TRUE if char is a valid digit
*/
static PRBool IsDigit(PRUnichar ch);
static void Recycle(nsString* aString);
static nsString* CreateString(eCharSize aCharSize=eTwoByte);
nsIMemoryAgent* mAgent;
};
extern NS_COM int fputs(const nsString& aString, FILE* out);
//ostream& operator<<(ostream& aStream,const nsString& aString);
//virtual void DebugDump(ostream& aStream) const;
/**************************************************************
Here comes the AutoString class which uses internal memory
(typically found on the stack) for its default buffer.
If the buffer needs to grow, it gets reallocated on the heap.
**************************************************************/
class NS_COM nsAutoString : public nsString {
public:
nsAutoString(eCharSize aCharSize=kDefaultCharSize);
nsAutoString(const char* aCString,eCharSize aCharSize=kDefaultCharSize,PRInt32 aLength=-1);
nsAutoString(const PRUnichar* aString,eCharSize aCharSize=kDefaultCharSize,PRInt32 aLength=-1);
nsAutoString(CBufDescriptor& aBuffer);
nsAutoString(const nsStr& aString,eCharSize aCharSize=kDefaultCharSize);
nsAutoString(const nsAutoString& aString,eCharSize aCharSize=kDefaultCharSize);
#ifdef AIX
nsAutoString(const nsSubsumeStr& aSubsumeStr); // AIX requires a const
#else
nsAutoString(nsSubsumeStr& aSubsumeStr);
#endif // AIX
nsAutoString(PRUnichar aChar,eCharSize aCharSize=kDefaultCharSize);
virtual ~nsAutoString();
nsAutoString& operator=(const nsStr& aString) {nsString::Assign(aString); return *this;}
nsAutoString& operator=(const nsAutoString& aString) {nsString::Assign(aString); return *this;}
nsAutoString& operator=(const char* aCString) {nsString::Assign(aCString); return *this;}
nsAutoString& operator=(char aChar) {nsString::Assign(aChar); return *this;}
nsAutoString& operator=(const PRUnichar* aBuffer) {nsString::Assign(aBuffer); return *this;}
nsAutoString& operator=(PRUnichar aChar) {nsString::Assign(aChar); return *this;}
/**
* Retrieve the size of this string
* @return string length
*/
virtual void SizeOf(nsISizeOfHandler* aHandler) const;
char mBuffer[32];
};
/***************************************************************
The subsumestr class is very unusual.
It differs from a normal string in that it doesn't use normal
copy semantics when another string is assign to this.
Instead, it "steals" the contents of the source string.
This is very handy for returning nsString classes as part of
an operator+(...) for example, in that it cuts down the number
of copy operations that must occur.
You should probably not use this class unless you really know
what you're doing.
***************************************************************/
class NS_COM nsSubsumeStr : public nsString {
public:
nsSubsumeStr(nsStr& aString);
nsSubsumeStr(PRUnichar* aString,PRBool assumeOwnership,PRInt32 aLength=-1);
nsSubsumeStr(char* aString,PRBool assumeOwnership,PRInt32 aLength=-1);
};
#endif
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