mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 14:15:30 +00:00
290 lines
11 KiB
C++
Executable File
290 lines
11 KiB
C++
Executable File
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/*
|
|
* The contents of this file are subject to the Mozilla Public
|
|
* License Version 1.1 (the "License"); you may not use this file
|
|
* except in compliance with the License. You may obtain a copy of
|
|
* the License at http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS
|
|
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
|
|
* implied. See the License for the specific language governing
|
|
* rights and limitations under the License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 2000 Netscape Communications Corporation. All
|
|
* Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Scott Collins <scc@mozilla.org> (original author)
|
|
* Johnny Stenbeck <jst@netscape.com>
|
|
*
|
|
*/
|
|
|
|
#ifndef nsReadableUtils_h___
|
|
#define nsReadableUtils_h___
|
|
|
|
/**
|
|
* I guess all the routines in this file are all mis-named.
|
|
* According to our conventions, they should be |NS_xxx|.
|
|
*/
|
|
|
|
#ifndef nsAString_h___
|
|
#include "nsAString.h"
|
|
#endif
|
|
|
|
#ifndef nsAStringGenerator_h___
|
|
#include "nsAStringGenerator.h"
|
|
#endif
|
|
|
|
|
|
NS_COM size_t Distance( const nsAString::const_iterator&, const nsAString::const_iterator& );
|
|
NS_COM size_t Distance( const nsACString::const_iterator&, const nsACString::const_iterator& );
|
|
|
|
|
|
NS_COM void CopyUCS2toASCII( const nsAString& aSource, nsACString& aDest );
|
|
NS_COM void CopyASCIItoUCS2( const nsACString& aSource, nsAString& aDest );
|
|
|
|
/**
|
|
* Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
|
|
*
|
|
* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
|
|
* Performs a lossy encoding conversion by chopping 16-bit wide characters down to 8-bits wide while copying |aSource| to your new buffer.
|
|
* This conversion is not well defined; but it reproduces legacy string behavior.
|
|
* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
|
|
*
|
|
* @param aSource a 16-bit wide string
|
|
* @return a new |char| buffer you must free with |nsMemory::Free|.
|
|
*/
|
|
NS_COM char* ToNewCString( const nsAString& aSource );
|
|
|
|
|
|
/**
|
|
* Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
|
|
*
|
|
* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
|
|
* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
|
|
*
|
|
* @param aSource an 8-bit wide string
|
|
* @return a new |char| buffer you must free with |nsMemory::Free|.
|
|
*/
|
|
NS_COM char* ToNewCString( const nsACString& aSource );
|
|
|
|
/**
|
|
* Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
|
|
*
|
|
* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
|
|
* Performs a encoding conversion by converting 16-bit wide characters down to UTF8 encoded 8-bits wide string copying |aSource| to your new buffer.
|
|
* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
|
|
*
|
|
* @param aSource a 16-bit wide string
|
|
* @return a new |char| buffer you must free with |nsMemory::Free|.
|
|
*/
|
|
|
|
NS_COM char* ToNewUTF8String( const nsAString& aSource );
|
|
|
|
|
|
/**
|
|
* Returns a new |PRUnichar| buffer containing a zero-terminated copy of |aSource|.
|
|
*
|
|
* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
|
|
* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
|
|
*
|
|
* @param aSource a 16-bit wide string
|
|
* @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
|
|
*/
|
|
NS_COM PRUnichar* ToNewUnicode( const nsAString& aSource );
|
|
|
|
|
|
/**
|
|
* Returns a new |PRUnichar| buffer containing a zero-terminated copy of |aSource|.
|
|
*
|
|
* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
|
|
* Performs an encoding conversion by 0-padding 8-bit wide characters up to 16-bits wide while copying |aSource| to your new buffer.
|
|
* This conversion is not well defined; but it reproduces legacy string behavior.
|
|
* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
|
|
*
|
|
* @param aSource an 8-bit wide string
|
|
* @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
|
|
*/
|
|
NS_COM PRUnichar* ToNewUnicode( const nsACString& aSource );
|
|
|
|
/**
|
|
* Copies |aLength| 16-bit characters from the start of |aSource| to the
|
|
* |PRUnichar| buffer |aDest|.
|
|
*
|
|
* After this operation |aDest| is not null terminated.
|
|
*
|
|
* @param aSource a 16-bit wide string
|
|
* @param aSrcOffset start offset in the source string
|
|
* @param aDest a |PRUnichar| buffer
|
|
* @param aLength the number of 16-bit characters to copy
|
|
* @return pointer to destination buffer - identical to |aDest|
|
|
*/
|
|
NS_COM PRUnichar* CopyUnicodeTo( const nsAString& aSource,
|
|
PRUint32 aSrcOffset,
|
|
PRUnichar* aDest,
|
|
PRUint32 aLength );
|
|
|
|
|
|
/**
|
|
* Copies 16-bit characters between iterators |aSrcStart| and
|
|
* |aSrcEnd| to the writable string |aDest|. Similar to the
|
|
* |nsString::Mid| method.
|
|
*
|
|
* After this operation |aDest| is not null terminated.
|
|
*
|
|
* @param aSrcStart start source iterator
|
|
* @param aSrcEnd end source iterator
|
|
* @param aDest destination for the copy
|
|
*/
|
|
NS_COM void CopyUnicodeTo( const nsAString::const_iterator& aSrcStart,
|
|
const nsAString::const_iterator& aSrcEnd,
|
|
nsAString& aDest );
|
|
|
|
/**
|
|
* Appends 16-bit characters between iterators |aSrcStart| and
|
|
* |aSrcEnd| to the writable string |aDest|.
|
|
*
|
|
* After this operation |aDest| is not null terminated.
|
|
*
|
|
* @param aSrcStart start source iterator
|
|
* @param aSrcEnd end source iterator
|
|
* @param aDest destination for the copy
|
|
*/
|
|
NS_COM void AppendUnicodeTo( const nsAString::const_iterator& aSrcStart,
|
|
const nsAString::const_iterator& aSrcEnd,
|
|
nsAString& aDest );
|
|
|
|
/**
|
|
* Returns |PR_TRUE| if |aString| contains only ASCII characters, that is, characters in the range (0x00, 0x7F).
|
|
*
|
|
* @param aString a 16-bit wide string to scan
|
|
*/
|
|
NS_COM PRBool IsASCII( const nsAString& aString );
|
|
|
|
|
|
|
|
/**
|
|
* Converts case in place in the argument string.
|
|
*/
|
|
NS_COM void ToUpperCase( nsACString& );
|
|
|
|
NS_COM void ToLowerCase( nsACString& );
|
|
|
|
/**
|
|
* Finds the leftmost occurance of |aPattern|, if any in the range |aSearchStart|..|aSearchEnd|.
|
|
*
|
|
* Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
|
|
* point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
|
|
*
|
|
* Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
|
|
* If we need something faster, then we can implement that later.
|
|
*/
|
|
|
|
NS_COM PRBool FindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator&, const nsStringComparator& = nsDefaultStringComparator() );
|
|
NS_COM PRBool FindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator&, const nsCStringComparator& = nsDefaultCStringComparator() );
|
|
NS_COM PRBool CaseInsensitiveFindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator& );
|
|
|
|
/**
|
|
* Finds the rightmost occurance of |aPattern|
|
|
* Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
|
|
* point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
|
|
*
|
|
* Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
|
|
* If we need something faster, then we can implement that later.
|
|
*/
|
|
NS_COM PRBool RFindInReadable( const nsAString& aPattern, nsAString::const_iterator&, nsAString::const_iterator& );
|
|
NS_COM PRBool RFindInReadable( const nsACString& aPattern, nsACString::const_iterator&, nsACString::const_iterator& );
|
|
|
|
/**
|
|
* Finds the leftmost occurance of |aChar|, if any in the range
|
|
* |aSearchStart|..|aSearchEnd|.
|
|
*
|
|
* Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| to
|
|
* point to the match. If no match was found, returns |PR_FALSE| and
|
|
* makes |aSearchStart == aSearchEnd|.
|
|
*/
|
|
NS_COM PRBool FindCharInReadable( PRUnichar aChar, nsAString::const_iterator& aSearchStart, const nsAString::const_iterator& aSearchEnd );
|
|
NS_COM PRBool FindCharInReadable( char aChar, nsACString::const_iterator& aSearchStart, const nsACString::const_iterator& aSearchEnd );
|
|
|
|
/**
|
|
* Finds the number of occurences of |aChar| in the string |aStr|
|
|
*/
|
|
NS_COM PRUint32 CountCharInReadable( const nsAString& aStr,
|
|
PRUnichar aChar );
|
|
NS_COM PRUint32 CountCharInReadable( const nsACString& aStr,
|
|
char aChar );
|
|
|
|
|
|
/*
|
|
|nsSubstituteC?String|:
|
|
this is currently a naive implementation leveraging |FindInReadable|. I have a better
|
|
algorithm in mind -- Gonnet, Baeza-Yates `Shift-Or' searching which is linear and simple
|
|
to implement (not quite as simple as re-using |FindInReadable|, though :-).
|
|
*/
|
|
|
|
class NS_COM nsSubstituteString
|
|
: public nsAStringGenerator
|
|
{
|
|
public:
|
|
nsSubstituteString( const nsAString& aText, const nsAString& aPattern, const nsAString& aReplacement )
|
|
: mText(aText),
|
|
mPattern(aPattern),
|
|
mReplacement(aReplacement),
|
|
mNumberOfMatches(-1) // |-1| means `don't know'
|
|
{
|
|
// nothing else to do here
|
|
}
|
|
|
|
virtual PRUnichar* operator()( PRUnichar* aDestBuffer ) const;
|
|
virtual PRUint32 Length() const;
|
|
virtual PRUint32 MaxLength() const;
|
|
virtual PRBool IsDependentOn( const nsAString& ) const;
|
|
|
|
private:
|
|
void CountMatches() const;
|
|
|
|
private:
|
|
const nsAString& mText;
|
|
const nsAString& mPattern;
|
|
const nsAString& mReplacement;
|
|
/* mutable */ PRInt32 mNumberOfMatches;
|
|
};
|
|
|
|
class NS_COM nsSubstituteCString
|
|
: public nsACStringGenerator
|
|
{
|
|
public:
|
|
nsSubstituteCString( const nsACString& aText, const nsACString& aPattern, const nsACString& aReplacement )
|
|
: mText(aText),
|
|
mPattern(aPattern),
|
|
mReplacement(aReplacement),
|
|
mNumberOfMatches(-1) // |-1| means `don't know'
|
|
{
|
|
// nothing else to do here
|
|
}
|
|
|
|
virtual char* operator()( char* aDestBuffer ) const;
|
|
virtual PRUint32 Length() const;
|
|
virtual PRUint32 MaxLength() const;
|
|
virtual PRBool IsDependentOn( const nsACString& ) const;
|
|
|
|
private:
|
|
void CountMatches() const;
|
|
|
|
private:
|
|
const nsACString& mText;
|
|
const nsACString& mPattern;
|
|
const nsACString& mReplacement;
|
|
/* mutable */ PRInt32 mNumberOfMatches;
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
#endif // !defined(nsReadableUtils_h___)
|