зеркало из https://github.com/mozilla/gecko-dev.git
218 строки
9.0 KiB
C
Executable File
218 строки
9.0 KiB
C
Executable File
/* -*- 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 Mozilla 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/MPL/
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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) 2000 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Scott Collins <scc@mozilla.org> (original author)
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* Johnny Stenbeck <jst@netscape.com>
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*
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*/
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#ifndef nsReadableUtils_h___
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#define nsReadableUtils_h___
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/**
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* I guess all the routines in this file are all mis-named.
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* According to our conventions, they should be |NS_xxx|.
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*/
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#ifndef nsAWritableString_h___
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#include "nsAWritableString.h"
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#endif
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NS_COM size_t Distance( const nsReadingIterator<PRUnichar>&, const nsReadingIterator<PRUnichar>& );
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NS_COM size_t Distance( const nsReadingIterator<char>&, const nsReadingIterator<char>& );
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NS_COM void CopyUCS2toASCII( const nsAReadableString& aSource, nsAWritableCString& aDest );
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NS_COM void CopyASCIItoUCS2( const nsAReadableCString& aSource, nsAWritableString& aDest );
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/**
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* Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
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*
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* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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* Performs a lossy encoding conversion by chopping 16-bit wide characters down to 8-bits wide while copying |aSource| to your new buffer.
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* This conversion is not well defined; but it reproduces legacy string behavior.
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* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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*
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* @param aSource a 16-bit wide string
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* @return a new |char| buffer you must free with |nsMemory::Free|.
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*/
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NS_COM char* ToNewCString( const nsAReadableString& aSource );
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/**
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* Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
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*
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* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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*
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* @param aSource an 8-bit wide string
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* @return a new |char| buffer you must free with |nsMemory::Free|.
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*/
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NS_COM char* ToNewCString( const nsAReadableCString& aSource );
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/**
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* Returns a new |char| buffer containing a zero-terminated copy of |aSource|.
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*
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* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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* Performs a encoding conversion by converting 16-bit wide characters down to UTF8 encoded 8-bits wide string copying |aSource| to your new buffer.
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* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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*
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* @param aSource a 16-bit wide string
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* @return a new |char| buffer you must free with |nsMemory::Free|.
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*/
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NS_COM char* ToNewUTF8String( const nsAReadableString& aSource );
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/**
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* Returns a new |PRUnichar| buffer containing a zero-terminated copy of |aSource|.
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*
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* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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*
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* @param aSource a 16-bit wide string
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* @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
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*/
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NS_COM PRUnichar* ToNewUnicode( const nsAReadableString& aSource );
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/**
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* Returns a new |PRUnichar| buffer containing a zero-terminated copy of |aSource|.
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*
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* Allocates and returns a new |char| buffer which you must free with |nsMemory::Free|.
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* Performs an encoding conversion by 0-padding 8-bit wide characters up to 16-bits wide while copying |aSource| to your new buffer.
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* This conversion is not well defined; but it reproduces legacy string behavior.
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* The new buffer is zero-terminated, but that may not help you if |aSource| contains embedded nulls.
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*
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* @param aSource an 8-bit wide string
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* @return a new |PRUnichar| buffer you must free with |nsMemory::Free|.
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*/
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NS_COM PRUnichar* ToNewUnicode( const nsAReadableCString& aSource );
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/**
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* Copies |aLength| 16-bit characters from the start of |aSource| to the
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* |PRUnichar| buffer |aDest|.
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*
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* After this operation |aDest| is not null terminated.
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*
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* @param aSource a 16-bit wide string
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* @param aSrcOffset start offset in the source string
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* @param aDest a |PRUnichar| buffer
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* @param aLength the number of 16-bit characters to copy
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* @return pointer to destination buffer - identical to |aDest|
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*/
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NS_COM PRUnichar* CopyUnicodeTo( const nsAReadableString& aSource,
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PRUint32 aSrcOffset,
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PRUnichar* aDest,
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PRUint32 aLength );
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/**
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* Copies 16-bit characters between iterators |aSrcStart| and
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* |aSrcEnd| to the writable string |aDest|. Similar to the
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* |nsString::Mid| method.
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*
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* After this operation |aDest| is not null terminated.
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*
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* @param aSrcStart start source iterator
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* @param aSrcEnd end source iterator
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* @param aDest destination for the copy
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*/
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NS_COM void CopyUnicodeTo( const nsReadingIterator<PRUnichar>& aSrcStart,
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const nsReadingIterator<PRUnichar>& aSrcEnd,
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nsAWritableString& aDest );
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/**
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* Appends 16-bit characters between iterators |aSrcStart| and
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* |aSrcEnd| to the writable string |aDest|.
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*
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* After this operation |aDest| is not null terminated.
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*
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* @param aSrcStart start source iterator
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* @param aSrcEnd end source iterator
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* @param aDest destination for the copy
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*/
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NS_COM void AppendUnicodeTo( const nsReadingIterator<PRUnichar>& aSrcStart,
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const nsReadingIterator<PRUnichar>& aSrcEnd,
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nsAWritableString& aDest );
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/**
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* Returns |PR_TRUE| if |aString| contains only ASCII characters, that is, characters in the range (0x00, 0x7F).
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*
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* @param aString a 16-bit wide string to scan
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*/
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NS_COM PRBool IsASCII( const nsAReadableString& aString );
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/**
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* Converts case in place in the argument string.
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*/
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NS_COM void ToUpperCase( nsAWritableString& );
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NS_COM void ToUpperCase( nsAWritableCString& );
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NS_COM void ToLowerCase( nsAWritableString& );
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NS_COM void ToLowerCase( nsAWritableCString& );
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/**
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* Finds the leftmost occurance of |aPattern|, if any in the range |aSearchStart|..|aSearchEnd|.
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*
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* Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
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* point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
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*
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* Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
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* If we need something faster; we can implement that later.
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*/
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NS_COM PRBool FindInReadable( const nsAReadableString& aPattern, nsReadingIterator<PRUnichar>&, nsReadingIterator<PRUnichar>& );
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NS_COM PRBool FindInReadable( const nsAReadableCString& aPattern, nsReadingIterator<char>&, nsReadingIterator<char>& );
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/**
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* Finds the rightmost occurance of |aPattern|
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* Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| and |aSearchEnd| to
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* point to the match. If no match was found, returns |PR_FALSE| and makes |aSearchStart == aSearchEnd|.
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*
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* Currently, this is equivalent to the O(m*n) implementation previously on |ns[C]String|.
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* If we need something faster; we can implement that later.
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*/
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NS_COM PRBool RFindInReadable( const nsAReadableString& aPattern, nsReadingIterator<PRUnichar>&, nsReadingIterator<PRUnichar>& );
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NS_COM PRBool RFindInReadable( const nsAReadableCString& aPattern, nsReadingIterator<char>&, nsReadingIterator<char>& );
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/**
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* Finds the leftmost occurance of |aChar|, if any in the range
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* |aSearchStart|..|aSearchEnd|.
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*
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* Returns |PR_TRUE| if a match was found, and adjusts |aSearchStart| to
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* point to the match. If no match was found, returns |PR_FALSE| and
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* makes |aSearchStart == aSearchEnd|.
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*/
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NS_COM PRBool FindCharInReadable( PRUnichar aChar, nsReadingIterator<PRUnichar>& aSearchStart, const nsReadingIterator<PRUnichar>& aSearchEnd );
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NS_COM PRBool FindCharInReadable( char aChar, nsReadingIterator<char>& aSearchStart, const nsReadingIterator<char>& aSearchEnd );
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/**
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* Finds the number of occurences of |aChar| in the string |aStr|
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*/
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NS_COM PRUint32 CountCharInReadable( const nsAReadableString& aStr,
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PRUnichar aChar );
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NS_COM PRUint32 CountCharInReadable( const nsAReadableCString& aStr,
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char aChar );
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#endif // !defined(nsReadableUtils_h___)
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