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137 lines
3.6 KiB
C++
137 lines
3.6 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 Communicator client code.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* 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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*/
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#include "nsUnicodeToUEscape.h"
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#include "nsUCvLatinSupport.h"
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#include <string.h>
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// XXX should we inherited from nsEncoderSupprt ? We don't want the buffer stuff there
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class nsUnicodeToUEscape : public nsEncoderSupport
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{
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public:
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/**
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* Class constructor.
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*/
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nsUnicodeToUEscape() {};
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/**
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* Static class constructor.
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*/
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static nsresult CreateInstance(nsISupports **aResult);
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NS_IMETHOD FillInfo(PRUint32* aInfo)
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{
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memset(aInfo, 0xFF, (0x10000L >> 3));
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return NS_OK;
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}
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NS_IMETHOD Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength,
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char * aDest, PRInt32 * aDestLength);
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NS_IMETHOD Finish(char * aDest, PRInt32 * aDestLength)
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{
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return NS_OK;
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}
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NS_IMETHOD Reset()
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{
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return NS_OK;
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}
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protected:
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//--------------------------------------------------------------------
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// Subclassing of nsEncoderSupport class [declaration]
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NS_IMETHOD GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength,
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PRInt32 * aDestLength)
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{
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*aDestLength = 6*aSrcLength;
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return NS_OK;
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};
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NS_IMETHOD ConvertNoBuffNoErr(const PRUnichar * aSrc, PRInt32 * aSrcLength,
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char * aDest, PRInt32 * aDestLength)
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{
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NS_ASSERTION(PR_FALSE, "should never call this");
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return NS_ERROR_NOT_IMPLEMENTED;
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};
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};
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nsresult nsUnicodeToUEscape::CreateInstance(nsISupports ** aResult)
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{
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*aResult = (nsIUnicodeEncoder*) new nsUnicodeToUEscape();
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return (*aResult == NULL)? NS_ERROR_OUT_OF_MEMORY : NS_OK;
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}
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char hexarray[]="0123456789ABCDEF";
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NS_IMETHODIMP nsUnicodeToUEscape::Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength,
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char * aDest, PRInt32 * aDestLength)
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{
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const PRUnichar *src = aSrc;
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const PRUnichar *srcEnd = aSrc + *aSrcLength;
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char * dest = aDest;
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const char * destEnd = aDest + *aDestLength;
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while(( src < srcEnd) && (dest<destEnd))
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{
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if(0x0000 == ( 0xFF80 & (*src)) )
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{
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if( PRUnichar('\\') == *src)
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{
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if((dest +2 ) >= destEnd)
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goto error;
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*dest++ = (char) '\\';
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*dest++ = (char) '\\';
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} else {
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*dest++ = (char) *src;
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}
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} else {
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if((dest +6 ) >= destEnd)
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goto error;
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*dest++ = (char) '\\';
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*dest++ = (char) 'u';
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*dest++ = (char) hexarray[0x0f & (*src >> 12)];
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*dest++ = (char) hexarray[0x0f & (*src >> 8)];
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*dest++ = (char) hexarray[0x0f & (*src >> 4)];
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*dest++ = (char) hexarray[0x0f & (*src)];
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}
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src++;
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}
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return NS_OK;
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error:
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*aSrcLength = src - aSrc;
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*aDestLength = dest - aDest;
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return NS_OK_UDEC_MOREOUTPUT;
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}
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nsresult NEW_UnicodeToUEscape(nsISupports **aResult)
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{
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*aResult = (nsIUnicodeEncoder*)new nsUnicodeToUEscape();
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return (NULL == *aResult) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
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}
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