зеркало из https://github.com/mozilla/gecko-dev.git
503 строки
17 KiB
C++
503 строки
17 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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/*
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* nsString.h --- rickg's original strings of 1-byte chars, |nsCString|
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* and |nsCAutoString|; these classes will be replaced by the new
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* shared-buffer string (see bug #53065)
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*
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* This file will one day be _only_ a compatibility header for clients
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* using the names |ns[C]String| et al ... which we probably want to
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* support forever.
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*/
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#ifndef nsString_h__
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#define nsString_h__
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#ifndef nsString2_h__
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#include "nsString2.h"
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#endif
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class NS_COM nsCString :
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public nsAFlatCString,
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public nsStr {
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public:
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friend class nsString;
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friend NS_COM void ToUpperCase( nsCString& );
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friend NS_COM void ToLowerCase( nsCString& );
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protected:
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virtual const nsBufferHandle<char>* GetFlatBufferHandle() const;
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virtual const char* GetReadableFragment( nsReadableFragment<char>&, nsFragmentRequest, PRUint32 ) const;
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virtual char* GetWritableFragment( nsWritableFragment<char>&, nsFragmentRequest, PRUint32 );
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public:
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virtual const char* get() const { return mStr; }
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public:
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/**
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* Default constructor.
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*/
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nsCString();
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/**
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* This is our copy constructor
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* @param reference to another nsCString
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*/
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nsCString(const nsCString& aString);
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explicit nsCString( const nsACString& );
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explicit nsCString(const char*);
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nsCString(const char*, PRInt32);
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/**
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* Destructor
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*
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*/
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virtual ~nsCString();
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/**
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* Retrieve the length of this string
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* @return string length
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*/
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virtual PRUint32 Length() const { return mLength; }
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/**
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* Call this method if you want to force a different string capacity
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* @update gess7/30/98
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* @param aLength -- contains new length for mStr
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* @return
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*/
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void SetLength(PRUint32 aLength);
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/**
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* Sets the new length of the string.
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* @param aLength is new string length.
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* @return nada
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*/
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void SetCapacity(PRUint32 aLength);
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/**********************************************************************
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Accessor methods...
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*********************************************************************/
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PRBool SetCharAt(PRUnichar aChar,PRUint32 anIndex);
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/**********************************************************************
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Lexomorphic transforms...
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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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* characters found in aSet from this string.
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*
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* @param aSet -- characters to be cut from this
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* @return *this
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*/
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void StripChars(const char* aSet);
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void StripChar(char aChar,PRInt32 anOffset=0);
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/**
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* This method strips whitespace throughout the string
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*
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* @return this
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*/
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void StripWhitespace();
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/**
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* swaps occurence of 1 string for another
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*
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* @return this
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*/
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void ReplaceChar(char aOldChar,char aNewChar);
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void ReplaceChar(const char* aSet,char aNewChar);
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void ReplaceSubstring(const nsCString& aTarget,const nsCString& aNewValue);
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void ReplaceSubstring(const char* aTarget,const char* aNewValue);
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/**
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* This method trims characters found in aTrimSet from
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* either end of the underlying string.
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*
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* @param aTrimSet -- contains chars to be trimmed from
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* both ends
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* @param aEliminateLeading
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* @param aEliminateTrailing
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* @param aIgnoreQuotes
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* @return this
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*/
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void Trim(const char* aSet,PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE,PRBool aIgnoreQuotes=PR_FALSE);
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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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* @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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void CompressWhitespace( PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
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/**********************************************************************
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string conversion methods...
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*********************************************************************/
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/**
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* Perform string to float conversion.
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* @param aErrorCode will contain error if one occurs
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* @return float rep of string value
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*/
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float ToFloat(PRInt32* aErrorCode) const;
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/**
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* Perform string to int conversion.
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* @param aErrorCode will contain error if one occurs
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* @param aRadix tells us which radix to assume; kAutoDetect tells us to determine the radix for you.
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* @return int rep of string value, and possible (out) error code
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*/
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PRInt32 ToInteger(PRInt32* aErrorCode,PRUint32 aRadix=kRadix10) const;
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/**********************************************************************
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String manipulation methods...
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*********************************************************************/
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/**
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* assign given string to this string
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* @param aStr: buffer to be assigned to this
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* @param aCount is the length of the given str (or -1) if you want me to determine its length
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* NOTE: IFF you pass -1 as aCount, then your buffer must be null terminated.
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*
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* @return this
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*/
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nsCString& operator=( const nsCString& aString ) { Assign(aString); return *this; }
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nsCString& operator=( const nsACString& aReadable ) { Assign(aReadable); return *this; }
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//nsCString& operator=( const nsPromiseReadable<char>& aReadable ) { Assign(aReadable); return *this; }
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nsCString& operator=( const char* aPtr ) { Assign(aPtr); return *this; }
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nsCString& operator=( char aChar ) { Assign(aChar); return *this; }
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void AssignWithConversion(const PRUnichar*,PRInt32=-1);
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void AssignWithConversion( const nsString& aString );
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void AssignWithConversion( const nsAString& aString );
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/*
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* Appends n characters from given string to this,
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*
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* @param aString is the source to be appended to this
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* @param aCount -- number of chars to copy; -1 tells us to compute the strlen for you
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* NOTE: IFF you pass -1 as aCount, then your buffer must be null terminated.
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*
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* @return number of chars copied
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*/
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void AppendWithConversion(const nsString&, PRInt32=-1);
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void AppendWithConversion( const nsAString& aString );
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void AppendWithConversion(const PRUnichar*, PRInt32=-1);
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// Why no |AppendWithConversion(const PRUnichar*, PRInt32)|? --- now I know, because implicit construction hid the need for this routine
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void AppendInt(PRInt32 aInteger,PRInt32 aRadix=10); //radix=8,10 or 16
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void AppendFloat( double aFloat );
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#if 0
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virtual void do_AppendFromReadable( const nsACString& );
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virtual void do_InsertFromReadable( const nsACString&, PRUint32 );
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#endif
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// Takes ownership of aPtr, sets the current length to aLength if specified.
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void Adopt( char* aPtr, PRInt32 aLength = -1 );
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/*
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|Left|, |Mid|, and |Right| are annoying signatures that seem better almost
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any _other_ way than they are now. Consider these alternatives
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aWritable = aReadable.Left(17); // ...a member function that returns a |Substring|
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aWritable = Left(aReadable, 17); // ...a global function that returns a |Substring|
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Left(aReadable, 17, aWritable); // ...a global function that does the assignment
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as opposed to the current signature
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aReadable.Left(aWritable, 17); // ...a member function that does the assignment
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or maybe just stamping them out in favor of |Substring|, they are just duplicate functionality
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aWritable = Substring(aReadable, 0, 17);
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*/
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size_type Left( self_type&, size_type ) const;
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size_type Mid( self_type&, PRUint32, PRUint32 ) const;
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size_type Right( self_type&, size_type ) const;
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/**********************************************************************
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Searching methods...
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*********************************************************************/
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/**
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* Search for given substring within this string
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*
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* @param aString is substring to be sought in this
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* @param aIgnoreCase selects case sensitivity
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* @param anOffset tells us where in this strig to start searching
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* @param aCount 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 nsCString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=0,PRInt32 aCount=-1) const;
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PRInt32 Find(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=0,PRInt32 aCount=-1) const;
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/**
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* Search for given char within this string
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*
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* @param aString is substring to be sought in this
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* @param anOffset tells us where in this strig to start searching
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* @param aIgnoreCase selects case sensitivity
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* @param aCount tells us how many iterations to make starting at the given offset
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* @return find pos in string, or -1 (kNotFound)
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*/
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PRInt32 FindChar(PRUnichar aChar,PRInt32 anOffset=0,PRInt32 aCount=-1) const;
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/**
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* This method searches this string for the first character
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* found in the given charset
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* @param aString contains set of chars to be found
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* @param anOffset tells us where to start searching in this
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* @return -1 if not found, else the offset in this
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*/
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PRInt32 FindCharInSet(const char* aString,PRInt32 anOffset=0) const;
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PRInt32 FindCharInSet(const nsCString& aString,PRInt32 anOffset=0) const;
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/**
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* This methods scans the string backwards, looking for the given string
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* @param aString is substring to be sought in this
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* @param aIgnoreCase tells us whether or not to do caseless compare
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* @param aCount 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 RFind(const char* aCString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aCount=-1) const;
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PRInt32 RFind(const nsCString& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aCount=-1) const;
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/**
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* Search for given char within this string
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*
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* @param aString is substring to be sought in this
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* @param anOffset tells us where in this strig to start searching
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* @param aIgnoreCase selects case sensitivity
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* @return find pos in string, or -1 (kNotFound)
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*/
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PRInt32 RFindChar(PRUnichar aChar,PRInt32 anOffset=-1,PRInt32 aCount=-1) const;
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/**
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* This method searches this string for the last character
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* found in the given string
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* @param aString contains set of chars to be found
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* @param anOffset tells us where to start searching in this
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* @return -1 if not found, else the offset in this
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*/
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PRInt32 RFindCharInSet(const char* aString,PRInt32 anOffset=-1) const;
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PRInt32 RFindCharInSet(const nsCString& aString,PRInt32 anOffset=-1) const;
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/**********************************************************************
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Comparison methods...
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*********************************************************************/
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/**
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* Compares a given string type to this string.
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* @update gess 7/27/98
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* @param S is the string to be compared
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* @param aIgnoreCase tells us how to treat case
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* @param aCount tells us how many chars to compare
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* @return -1,0,1
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*/
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PRInt32 Compare(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool EqualsWithConversion(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool EqualsIgnoreCase(const char* aString,PRInt32 aCount=-1) const;
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#ifdef DEBUG
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/**
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* Retrieve the size of this string
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* @return string length
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*/
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virtual void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
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#endif
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private:
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// NOT TO BE IMPLEMENTED
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// these signatures help clients not accidentally call the wrong thing helped by C++ automatic integral promotion
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void operator=( PRUnichar );
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void AssignWithConversion( const char*, PRInt32=-1 );
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void InsertWithConversion( char, PRUint32 );
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};
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inline
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nsCString::size_type
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nsCString::Left( nsACString& aResult, size_type aLengthToCopy ) const
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{
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return Mid(aResult, 0, aLengthToCopy);
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}
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inline
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nsCString::size_type
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nsCString::Right( self_type& aResult, size_type aLengthToCopy ) const
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{
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size_type myLength = Length();
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aLengthToCopy = NS_MIN(myLength, aLengthToCopy);
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return Mid(aResult, myLength-aLengthToCopy, aLengthToCopy);
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}
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// NS_DEF_STRING_COMPARISON_OPERATORS(nsCString, char)
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// NS_DEF_DERIVED_STRING_OPERATOR_PLUS(nsCString, char)
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/**************************************************************
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Here comes the AutoString class which uses internal memory
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(typically found on the stack) for its default buffer.
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If the buffer needs to grow, it gets reallocated on the heap.
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**************************************************************/
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class NS_COM nsCAutoString : public nsCString {
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public:
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virtual ~nsCAutoString() {}
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nsCAutoString();
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explicit nsCAutoString(const nsCString& );
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explicit nsCAutoString(const nsACString& aString);
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explicit nsCAutoString(const char* aString);
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nsCAutoString(const char* aString,PRInt32 aLength);
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explicit nsCAutoString(const CBufDescriptor& aBuffer);
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nsCAutoString& operator=( const nsCAutoString& aString ) { Assign(aString); return *this; }
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private:
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void operator=( PRUnichar ); // NOT TO BE IMPLEMENTED
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public:
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nsCAutoString& operator=( const nsACString& aReadable ) { Assign(aReadable); return *this; }
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// nsCAutoString& operator=( const nsPromiseReadable<char>& aReadable ) { Assign(aReadable); return *this; }
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nsCAutoString& operator=( const char* aPtr ) { Assign(aPtr); return *this; }
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nsCAutoString& operator=( char aChar ) { Assign(aChar); return *this; }
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#ifdef DEBUG
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/**
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* Retrieve the size of this string
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* @return string length
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*/
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virtual void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
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#endif
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char mBuffer[kDefaultStringSize];
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};
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// NS_DEF_DERIVED_STRING_OPERATOR_PLUS(nsCAutoString, char)
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/**
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* A helper class that converts a UCS2 string to UTF8
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*/
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class NS_COM NS_ConvertUCS2toUTF8
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: public nsCAutoString
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/*
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...
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*/
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{
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public:
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friend NS_COM char* ToNewUTF8String( const nsAString& aSource );
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public:
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explicit
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NS_ConvertUCS2toUTF8( const PRUnichar* aString )
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{
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Append( aString, ~PRUint32(0) /* MAXINT */);
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}
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NS_ConvertUCS2toUTF8( const PRUnichar* aString, PRUint32 aLength )
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{
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Append( aString, aLength );
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}
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explicit NS_ConvertUCS2toUTF8( const nsAString& aString );
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protected:
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void Append( const PRUnichar* aString, PRUint32 aLength );
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private:
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// NOT TO BE IMPLEMENTED
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NS_ConvertUCS2toUTF8( char );
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};
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/**
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* A helper class that converts a UCS2 string to ASCII in a lossy manner
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*/
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class NS_COM NS_LossyConvertUCS2toASCII
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: public nsCAutoString
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/*
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...
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*/
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{
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public:
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explicit
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NS_LossyConvertUCS2toASCII( const PRUnichar* aString )
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{
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AppendWithConversion( aString, ~PRUint32(0) /* MAXINT */);
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}
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NS_LossyConvertUCS2toASCII( const PRUnichar* aString, PRUint32 aLength )
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{
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AppendWithConversion( aString, aLength );
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}
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explicit NS_LossyConvertUCS2toASCII( const nsAString& aString );
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private:
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// NOT TO BE IMPLEMENTED
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NS_LossyConvertUCS2toASCII( char );
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};
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#endif /* !defined(nsString_h__) */
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