gecko-dev/xpcom/ds/nsVoidArray.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 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* IBM Corp.
*/
#ifndef nsVoidArray_h___
#define nsVoidArray_h___
#include "nscore.h"
#include "nsAWritableString.h"
class nsISizeOfHandler;
// Enumerator callback function. Return PR_FALSE to stop
typedef PRBool (* PR_CALLBACK nsVoidArrayEnumFunc)(void* aElement, void *aData);
/// A basic zero-based array of void*'s that manages its own memory
class NS_COM nsVoidArray {
public:
nsVoidArray();
nsVoidArray(PRInt32 aCount); // initial count of aCount elements set to nsnull
virtual ~nsVoidArray();
nsVoidArray& operator=(const nsVoidArray& other);
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
PRInt32 Count() const {
return mImpl ? mImpl->mCount : 0;
}
void* ElementAt(PRInt32 aIndex) const;
void* operator[](PRInt32 aIndex) const { return ElementAt(aIndex); }
PRInt32 IndexOf(void* aPossibleElement) const;
PRBool InsertElementAt(void* aElement, PRInt32 aIndex);
PRBool ReplaceElementAt(void* aElement, PRInt32 aIndex);
PRBool AppendElement(void* aElement) {
return InsertElementAt(aElement, Count());
}
PRBool RemoveElement(void* aElement);
PRBool RemoveElementAt(PRInt32 aIndex);
void Clear();
void Compact();
PRBool EnumerateForwards(nsVoidArrayEnumFunc aFunc, void* aData);
PRBool EnumerateBackwards(nsVoidArrayEnumFunc aFunc, void* aData);
protected:
struct Impl {
/**
* Packed bits. The highest 31 bits are the array's size, which must
* always be 0 mod 2. The lowest bit is a flag that indicates
* whether or not we "own" mArray, and must free() it when
* destroyed.
*/
PRUint32 mBits;
/**
* The number of elements in the array
*/
PRInt32 mCount;
/**
* Array data, padded out to the actual size of the array.
*/
void* mArray[1];
};
Impl* mImpl;
enum {
kArrayOwnerMask = 1 << 31,
kArraySizeMask = ~kArrayOwnerMask
};
// bit twiddlers
PRInt32 GetArraySize() const;
void SetArraySize(PRInt32 aSize);
PRBool IsArrayOwner() const;
void SetArrayOwner(PRBool aOwner);
private:
/// Copy constructors are not allowed
nsVoidArray(const nsVoidArray& other);
};
// A zero-based array with a bit of automatic internal storage
class NS_COM nsAutoVoidArray : public nsVoidArray {
public:
nsAutoVoidArray();
protected:
// The internal storage. Note that this value must be divisible by
// two because we use the LSB of mInfo to indicate array ownership.
enum { kAutoBufSize = 8 };
char mAutoBuf[sizeof(Impl) + (kAutoBufSize - 1) * sizeof(void*)];
};
class nsString;
typedef PRBool (*nsStringArrayEnumFunc)(nsString& aElement, void *aData);
class NS_COM nsStringArray: protected nsVoidArray
{
public:
nsStringArray(void);
virtual ~nsStringArray(void);
nsStringArray& operator=(const nsStringArray& other);
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
PRInt32 Count(void) const {
return nsVoidArray::Count();
}
void StringAt(PRInt32 aIndex, nsAWritableString& aString) const;
nsString* StringAt(PRInt32 aIndex) const;
nsString* operator[](PRInt32 aIndex) const { return StringAt(aIndex); }
PRInt32 IndexOf(const nsAReadableString& aPossibleString) const;
PRInt32 IndexOfIgnoreCase(const nsAReadableString& aPossibleString) const;
PRBool InsertStringAt(const nsAReadableString& aString, PRInt32 aIndex);
PRBool ReplaceStringAt(const nsAReadableString& aString, PRInt32 aIndex);
PRBool AppendString(const nsAReadableString& aString) {
return InsertStringAt(aString, Count());
}
PRBool RemoveString(const nsAReadableString& aString);
PRBool RemoveStringIgnoreCase(const nsAReadableString& aString);
PRBool RemoveStringAt(PRInt32 aIndex);
void Clear(void);
void Compact(void) {
nsVoidArray::Compact();
}
PRBool EnumerateForwards(nsStringArrayEnumFunc aFunc, void* aData);
PRBool EnumerateBackwards(nsStringArrayEnumFunc aFunc, void* aData);
private:
/// Copy constructors are not allowed
nsStringArray(const nsStringArray& other);
};
class nsCString;
typedef PRBool (*nsCStringArrayEnumFunc)(nsCString& aElement, void *aData);
class NS_COM nsCStringArray: protected nsVoidArray
{
public:
nsCStringArray(void);
virtual ~nsCStringArray(void);
nsCStringArray& operator=(const nsCStringArray& other);
void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
PRInt32 Count(void) const {
return nsVoidArray::Count();
}
void CStringAt(PRInt32 aIndex, nsCString& aCString) const;
nsCString* CStringAt(PRInt32 aIndex) const;
nsCString* operator[](PRInt32 aIndex) const { return CStringAt(aIndex); }
PRInt32 IndexOf(const nsCString& aPossibleString) const;
PRInt32 IndexOfIgnoreCase(const nsCString& aPossibleString) const;
PRBool InsertCStringAt(const nsCString& aCString, PRInt32 aIndex);
PRBool ReplaceCStringAt(const nsCString& aCString, PRInt32 aIndex);
PRBool AppendCString(const nsCString& aCString) {
return InsertCStringAt(aCString, Count());
}
PRBool RemoveCString(const nsCString& aCString);
PRBool RemoveCStringIgnoreCase(const nsCString& aCString);
PRBool RemoveCStringAt(PRInt32 aIndex);
void Clear(void);
void Compact(void) {
nsVoidArray::Compact();
}
PRBool EnumerateForwards(nsCStringArrayEnumFunc aFunc, void* aData);
PRBool EnumerateBackwards(nsCStringArrayEnumFunc aFunc, void* aData);
private:
/// Copy constructors are not allowed
nsCStringArray(const nsCStringArray& other);
};
#endif /* nsVoidArray_h___ */