зеркало из https://github.com/mozilla/gecko-dev.git
288 строки
11 KiB
C++
288 строки
11 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Rick Gessner <rickg@netscape.com> (original author)
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* Scott Collins <scc@mozilla.org>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef __nsStrPrivate_h
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#define __nsStrPrivate_h
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#include "nscore.h"
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#include "nsStrShared.h"
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struct nsStr;
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// there are only static methods here!
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class nsStrPrivate {
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public:
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/**
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* This method initializes an nsStr for use
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*
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* @update gess 01/04/99
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* @param aString is the nsStr to be initialized
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* @param aCharSize tells us the requested char size (1 or 2 bytes)
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*/
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static void Initialize(nsStr& aDest,eCharSize aCharSize);
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/**
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* This method initializes an nsStr for use
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*
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* @update gess 01/04/99
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* @param aString is the nsStr to be initialized
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* @param aCharSize tells us the requested char size (1 or 2 bytes)
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*/
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static void Initialize(nsStr& aDest,char* aCString,PRUint32 aCapacity,PRUint32 aLength,eCharSize aCharSize,PRBool aOwnsBuffer);
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/**
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* This method destroys the given nsStr, and *MAY*
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* deallocate it's memory depending on the setting
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* of the internal mOwnsBUffer flag.
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*
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* @update gess 01/04/99
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* @param aString is the nsStr to be manipulated
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*/
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static void Destroy(nsStr& aDest);
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/**
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* These methods are where memory allocation/reallocation occur.
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*
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* @update gess 01/04/99
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* @param aString is the nsStr to be manipulated
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* @return
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*/
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static PRBool EnsureCapacity(nsStr& aString,PRUint32 aNewLength);
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static PRBool GrowCapacity(nsStr& aString,PRUint32 aNewLength);
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/**
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* These methods are used to append content to the given nsStr
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*
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* @update gess 01/04/99
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* @param aDest is the nsStr to be appended to
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* @param aSource is the buffer to be copied from
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* @param anOffset tells us where in source to start copying
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* @param aCount tells us the (max) # of chars to copy
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*/
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static void StrAppend(nsStr& aDest,const nsStr& aSource,PRUint32 anOffset,PRInt32 aCount);
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/**
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* These methods are used to assign contents of a source string to dest string
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*
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* @update gess 01/04/99
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* @param aDest is the nsStr to be appended to
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* @param aSource is the buffer to be copied from
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* @param anOffset tells us where in source to start copying
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* @param aCount tells us the (max) # of chars to copy
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*/
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static void StrAssign(nsStr& aDest,const nsStr& aSource,PRUint32 anOffset,PRInt32 aCount);
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/**
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* These methods are used to insert content from source string to the dest nsStr
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*
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* @update gess 01/04/99
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* @param aDest is the nsStr to be appended to
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* @param aDestOffset tells us where in dest to start insertion
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* @param aSource is the buffer to be copied from
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* @param aSrcOffset tells us where in source to start copying
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* @param aCount tells us the (max) # of chars to insert
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*/
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static void StrInsert1into1( nsStr& aDest,PRUint32 aDestOffset,const nsStr& aSource,PRUint32 aSrcOffset,PRInt32 aCount);
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static void StrInsert1into2( nsStr& aDest,PRUint32 aDestOffset,const nsStr& aSource,PRUint32 aSrcOffset,PRInt32 aCount);
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static void StrInsert2into2( nsStr& aDest,PRUint32 aDestOffset,const nsStr& aSource,PRUint32 aSrcOffset,PRInt32 aCount);
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/**
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* Helper routines for StrInsert1into1, etc
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*/
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static PRInt32 GetSegmentLength(const nsStr& aSource,
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PRUint32 aSrcOffset, PRInt32 aCount);
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static void AppendForInsert(nsStr& aDest, PRUint32 aDestOffset, const nsStr& aSource, PRUint32 aSrcOffset, PRInt32 theLength);
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/**
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* This method deletes chars from the given str.
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* The given allocator may choose to resize the str as well.
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*
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* @update gess 01/04/99
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* @param aDest is the nsStr to be deleted from
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* @param aDestOffset tells us where in dest to start deleting
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* @param aCount tells us the (max) # of chars to delete
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*/
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static void Delete1(nsStr& aDest,PRUint32 aDestOffset,PRUint32 aCount);
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static void Delete2(nsStr& aDest,PRUint32 aDestOffset,PRUint32 aCount);
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/**
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* helper routines for Delete1, Delete2
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*/
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static PRInt32 GetDeleteLength(const nsStr& aDest, PRUint32 aDestOffset, PRUint32 aCount);
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/**
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* This method is used to truncate the given string.
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* The given allocator may choose to resize the str as well (but it's not likely).
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*
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* @update gess 01/04/99
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* @param aDest is the nsStr to be appended to
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* @param aDestOffset tells us where in dest to start insertion
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* @param aSource is the buffer to be copied from
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* @param aSrcOffset tells us where in source to start copying
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*/
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static void StrTruncate(nsStr& aDest,PRUint32 aDestOffset);
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/**
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* This method trims chars (given in aSet) from the edges of given buffer
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*
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* @update gess 01/04/99
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* @param aDest is the buffer to be manipulated
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* @param aSet tells us which chars to remove from given buffer
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* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
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* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
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*/
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static void Trim(nsStr& aDest,const char* aSet,PRBool aEliminateLeading,PRBool aEliminateTrailing);
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/**
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* This method compresses duplicate runs of a given char from the given buffer
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*
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* @update gess 01/04/99
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* @param aDest is the buffer to be manipulated
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* @param aSet tells us which chars to compress from given buffer
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* @param aChar is the replacement char
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* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
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* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
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*/
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static void CompressSet1(nsStr& aDest,const char* aSet,PRBool aEliminateLeading,PRBool aEliminateTrailing);
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static void CompressSet2(nsStr& aDest,const char* aSet,PRBool aEliminateLeading,PRBool aEliminateTrailing);
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/**
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* This method removes all occurances of chars in given set from aDest
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*
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* @update gess 01/04/99
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* @param aDest is the buffer to be manipulated
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* @param aSet tells us which chars to compress from given buffer
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* @param aChar is the replacement char
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* @param aEliminateLeading tells us whether to strip chars from the start of the buffer
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* @param aEliminateTrailing tells us whether to strip chars from the start of the buffer
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*/
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static void StripChars1(nsStr& aDest,const char* aSet);
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static void StripChars2(nsStr& aDest,const char* aSet);
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/**
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* This method compares the data bewteen two nsStr's
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*
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* @update gess 01/04/99
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* @param aStr1 is the first buffer to be compared
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* @param aStr2 is the 2nd buffer to be compared
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* @param aCount is the number of chars to compare
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* @param aIgnorecase tells us whether to use a case-sensitive comparison
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* @return -1,0,1 depending on <,==,>
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*/
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static PRInt32 StrCompare1To1(const nsStr& aDest,const nsStr& aSource,
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PRInt32 aCount,PRBool aIgnoreCase);
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static PRInt32 StrCompare2To1(const nsStr& aDest, const nsStr& aSource,
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PRInt32 aCount, PRBool aIgnoreCase);
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static PRInt32 StrCompare2To2(const nsStr& aDest, const nsStr& aSource,
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PRInt32 aCount);
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/**
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* These methods scan the given string for 1 or more chars in a given direction
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*
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* @update gess 01/04/99
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* @param aDest is the nsStr to be searched to
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* @param aSource (or aChar) is the substr we're looking to find
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* @param aIgnoreCase tells us whether to search in a case-sensitive manner
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* @param anOffset tells us where in the dest string to start searching
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* @return the index of the source (substr) in dest, or -1 (kNotFound) if not found.
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*/
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static PRInt32 FindSubstr1in1(const nsStr& aDest,const nsStr& aSource, PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 FindSubstr1in2(const nsStr& aDest,const nsStr& aSource, PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 FindSubstr2in2(const nsStr& aDest,const nsStr& aSource, PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 FindChar1(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 FindChar2(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 RFindSubstr1in1(const nsStr& aDest,const nsStr& aSource, PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 RFindSubstr1in2(const nsStr& aDest,const nsStr& aSource, PRBool aIgnoreCase,PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 RFindSubstr2in2(const nsStr& aDest,const nsStr& aSource, PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 RFindChar1(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount);
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static PRInt32 RFindChar2(const nsStr& aDest,PRUnichar aChar, PRInt32 anOffset,PRInt32 aCount);
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static void Overwrite(nsStr& aDest,const nsStr& aSource,PRInt32 anOffset);
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static char GetFindInSetFilter(const char *set)
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{
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// Calculate filter
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char filter = ~char(0); // All bits set
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while (*set) {
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filter &= ~(*set);
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++set;
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}
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return filter;
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}
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static PRUnichar GetFindInSetFilter(const PRUnichar *set)
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{
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// Calculate filter
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PRUnichar filter = ~PRUnichar(0); // All bits set
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while (*set) {
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filter &= ~(*set);
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++set;
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}
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return filter;
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}
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#ifdef NS_STR_STATS
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static PRBool DidAcquireMemory(void);
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#endif
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/**
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* Returns a hash code for the string for use in a PLHashTable.
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*/
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static PRUint32 HashCode(const nsStr& aDest);
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#ifdef NS_STR_STATS
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/**
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* Prints an nsStr. If truncate is true, the string is only printed up to
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* the first newline. (Note: The current implementation doesn't handle
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* non-ascii unicode characters.)
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*/
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static void Print(const nsStr& aDest, FILE* out, PRBool truncate = PR_FALSE);
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#endif
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static PRBool Alloc(nsStr& aString,PRUint32 aCount);
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static PRBool Realloc(nsStr& aString,PRUint32 aCount);
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static PRBool Free(nsStr& aString);
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};
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#endif
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