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587 lines
20 KiB
C++
587 lines
20 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* 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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/* nsString.h --- rickg's original strings of 1-byte chars, |nsCString| and |nsCAutoString|;
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these classes will be replaced by the new shared-buffer string (see bug #53065)
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*/
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#ifndef _nsCString_
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#define _nsCString_
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/***********************************************************************
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MODULE NOTES:
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See nsStr.h for a more general description of string classes.
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This version of the nsString class offers many improvements over the
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original version:
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1. Wide and narrow chars
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2. Allocators
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3. Much smarter autostrings
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4. Subsumable strings
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***********************************************************************/
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#include "nsString2.h"
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#include "prtypes.h"
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#include "nscore.h"
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#include <stdio.h>
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#include "nsStr.h"
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#include "nsIAtom.h"
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#include "nsAWritableString.h"
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class NS_COM nsSubsumeCStr;
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class NS_COM nsCString :
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public nsAWritableCString,
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public nsStr {
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protected:
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virtual const void* Implementation() const { return "nsCString"; }
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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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/**
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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 nsAReadableCString& );
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explicit nsCString(const char*);
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nsCString(const char*, PRInt32);
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/**
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* This constructor takes a subsumestr
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* @param reference to subsumestr
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*/
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explicit nsCString(nsSubsumeCStr& aSubsumeStr);
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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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* 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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/**
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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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/**
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* Retrieve const ptr to internal buffer; DO NOT TRY TO FREE IT!
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*/
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const char* GetBuffer() const { return get(); } // to be deprecated, prefer |get()|
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const char* get() const { return mStr; }
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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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* Converts chars in this to lowercase
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* @update gess 7/27/98
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*/
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void ToLowerCase();
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/**
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* Converts chars in this to lowercase, and
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* stores them in aOut
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* @update gess 7/27/98
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* @param aOut is a string to contain result
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*/
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void ToLowerCase(nsCString& aString) const;
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/**
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* Converts chars in this to uppercase
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* @update gess 7/27/98
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*/
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void ToUpperCase();
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/**
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* Converts chars in this to lowercase, and
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* stores them in a given output string
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* @update gess 7/27/98
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* @param aOut is a string to contain result
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*/
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void ToUpperCase(nsCString& aString) const;
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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(PRUnichar aChar,PRInt32 anOffset=0);
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void StripChar(char aChar,PRInt32 anOffset=0) { StripChar((PRUnichar) (unsigned char)aChar,anOffset); }
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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(PRUnichar aOldChar,PRUnichar aNewChar);
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void ReplaceChar(const char* aSet,PRUnichar 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 CompressSet(const char* aSet, PRUnichar aChar,PRBool aEliminateLeading=PR_TRUE,PRBool aEliminateTrailing=PR_TRUE);
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/**
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* This method strips whitespace from string.
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* You can control whether whitespace is yanked from
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* start and end of string as well.
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*
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* @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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//#ifndef STANDALONE_STRING_TESTS
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operator char*() {return mStr;}
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operator const char*() const {return (const char*)mStr;}
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//#endif
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/**
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* This method constructs a new nsCString that is a clone
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* of this string.
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*
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*/
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nsCString* ToNewString() const;
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/**
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* Creates an ISOLatin1 clone of this string
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* Note that calls to this method should be matched with calls to
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* |nsMemory::Free|.
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* @return ptr to new isolatin1 string
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*/
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char* ToNewCString() const;
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/**
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* Creates a unicode clone of this string
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* Note that calls to this method should be matched with calls to
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* |nsMemory::Free|.
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* @return ptr to new unicode string
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*/
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PRUnichar* ToNewUnicode() const;
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/**
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* Copies data from internal buffer onto given char* buffer
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* NOTE: This only copies as many chars as will fit in given buffer (clips)
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* @param aBuf is the buffer where data is stored
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* @param aBuflength is the max # of chars to move to buffer
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* @return ptr to given buffer
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*/
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char* ToCString(char* aBuf,PRUint32 aBufLength,PRUint32 anOffset=0) const;
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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 nsAReadableCString& 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 nsAReadableString& aString );
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void AssignWithConversion(PRUnichar);
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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(PRUnichar aChar);
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void AppendWithConversion( const nsAReadableString& 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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virtual void do_AppendFromReadable( const nsAReadableCString& );
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void InsertWithConversion(PRUnichar aChar,PRUint32 anOffset);
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// Why no |InsertWithConversion(PRUnichar*)|?
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virtual void do_InsertFromReadable( const nsAReadableCString&, PRUint32 );
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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 nsStr& 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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PRInt32 Find(const PRUnichar* 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,PRBool aIgnoreCase=PR_FALSE,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 PRUnichar* aString,PRInt32 anOffset=0) const;
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PRInt32 FindCharInSet(const nsStr& 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 nsStr& aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 anOffset=-1,PRInt32 aCount=-1) const;
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PRInt32 RFind(const PRUnichar* 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,PRBool aIgnoreCase=PR_FALSE,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 PRUnichar* aString,PRInt32 anOffset=-1) const;
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PRInt32 RFindCharInSet(const nsStr& 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 CompareWithConversion(const PRUnichar* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRInt32 CompareWithConversion(const char* aString,PRBool aIgnoreCase=PR_FALSE,PRInt32 aCount=-1) const;
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PRBool EqualsWithConversion(const nsString &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 EqualsWithConversion(const PRUnichar* 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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PRBool EqualsIgnoreCase(const PRUnichar* aString,PRInt32 aCount=-1) const;
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void DebugDump(void) const;
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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( char );
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void AssignWithConversion( const char*, PRInt32=-1 );
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void AppendWithConversion( char );
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void InsertWithConversion( char, PRUint32 );
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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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extern NS_COM int fputs(const nsCString& aString, FILE* out);
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//ostream& operator<<(ostream& aStream,const nsCString& aString);
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//virtual void DebugDump(ostream& aStream) const;
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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 nsAReadableCString& 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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#if defined(AIX) || defined(XP_OS2_VACPP)
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explicit nsCAutoString(const nsSubsumeCStr& aSubsumeStr); // AIX and VAC++ require a const
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#else
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explicit nsCAutoString(nsSubsumeCStr& aSubsumeStr);
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#endif // AIX || XP_OS2_VACPP
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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 nsAReadableCString& 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; }
|
|
|
|
/**
|
|
* Retrieve the size of this string
|
|
* @return string length
|
|
*/
|
|
virtual void SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const;
|
|
|
|
char mBuffer[kDefaultStringSize];
|
|
};
|
|
|
|
NS_DEF_DERIVED_STRING_OPERATOR_PLUS(nsCAutoString, char)
|
|
|
|
/**
|
|
* A helper class that converts a UCS2 string to UTF8
|
|
*/
|
|
class NS_COM NS_ConvertUCS2toUTF8
|
|
: public nsCAutoString
|
|
/*
|
|
...
|
|
*/
|
|
{
|
|
public:
|
|
explicit
|
|
NS_ConvertUCS2toUTF8( const PRUnichar* aString )
|
|
{
|
|
Append( aString, ~PRUint32(0) /* MAXINT */);
|
|
}
|
|
|
|
NS_ConvertUCS2toUTF8( const PRUnichar* aString, PRUint32 aLength )
|
|
{
|
|
Append( aString, aLength );
|
|
}
|
|
|
|
explicit
|
|
NS_ConvertUCS2toUTF8( PRUnichar aChar )
|
|
{
|
|
Append( &aChar, 1 );
|
|
}
|
|
|
|
explicit NS_ConvertUCS2toUTF8( const nsAReadableString& aString );
|
|
|
|
const char* get() const
|
|
{
|
|
return mStr;
|
|
}
|
|
|
|
operator const char*() const // to be deprecated, prefer |get()|
|
|
{
|
|
return get();
|
|
}
|
|
|
|
protected:
|
|
void Append( const PRUnichar* aString, PRUint32 aLength );
|
|
|
|
private:
|
|
// NOT TO BE IMPLEMENTED
|
|
NS_ConvertUCS2toUTF8( char );
|
|
};
|
|
|
|
|
|
/***************************************************************
|
|
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 nsSubsumeCStr : public nsCString {
|
|
public:
|
|
explicit nsSubsumeCStr(nsStr& aString);
|
|
nsSubsumeCStr(PRUnichar* aString,PRBool assumeOwnership,PRInt32 aLength=-1);
|
|
nsSubsumeCStr(char* aString,PRBool assumeOwnership,PRInt32 aLength=-1);
|
|
|
|
nsSubsumeCStr& operator=( const nsSubsumeCStr& aString ) { Assign(aString); return *this; }
|
|
nsSubsumeCStr& operator=( const nsAReadableCString& aReadable ) { Assign(aReadable); return *this; }
|
|
nsSubsumeCStr& operator=( const nsPromiseReadable<char>& aReadable ) { Assign(aReadable); return *this; }
|
|
nsSubsumeCStr& operator=( const char* aPtr ) { Assign(aPtr); return *this; }
|
|
nsSubsumeCStr& operator=( char aChar ) { Assign(aChar); return *this; }
|
|
private:
|
|
void operator=( PRUnichar ); // NOT TO BE IMPLEMENTED
|
|
};
|
|
|
|
|
|
#endif
|
|
|
|
|