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- /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * 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 Communicator client code.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
- #ifndef nsIUnicodeEncoder_h___
- #define nsIUnicodeEncoder_h___
-
- #include "nscore.h"
- #include "nsError.h"
- #include "nsISupports.h"
-
- // Interface ID for our Unicode Encoder interface
- // {2B2CA3D0-A4C9-11d2-8AA1-00600811A836}
- #define NS_IUNICODEENCODER_IID \
- { 0x2b2ca3d0, 0xa4c9, 0x11d2, \
- { 0x8a, 0xa1, 0x0, 0x60, 0x8, 0x11, 0xa8, 0x36 }}
-
- // Interface ID for our Unicode Character Encoder interface
- // {299BCCD0-C6DF-11d2-8AA8-00600811A836}
- #define NS_IUNICHARENCODER_IID \
- { 0x299bccd0, 0xc6df, 0x11d2, \
- {0x8a, 0xa8, 0x0, 0x60, 0x8, 0x11, 0xa8, 0x36 }}
-
- #define NS_OK_UENC_EXACTLENGTH \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 0x21)
-
- #define NS_OK_UENC_MOREOUTPUT \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 0x22)
-
- #define NS_ERROR_UENC_NOMAPPING \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 0x23)
-
- #define NS_OK_UENC_MOREINPUT \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 0x24)
-
-
- #define NS_UNICODEENCODER_CONTRACTID_BASE "@mozilla.org/intl/unicode/encoder;1?charset="
-
- /**
- * Interface which converts a single character from Unicode into a given
- * charset.
- *
- * @created 17/Feb/1999
- * @author Catalin Rotaru [CATA]
- */
- class nsIUnicharEncoder : public nsISupports
- {
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IUNICHARENCODER_IID)
-
- /**
- * Converts a character from Unicode to a Charset.
- */
- NS_IMETHOD Convert(PRUnichar aChar, char * aDest, PRInt32 * aDestLength) = 0;
- };
-
- //
- // Malloc an Encoder (unicode -> charset) buffer if the
- // result won't fit in the static buffer
- //
- // p = the buffer pointer (char*)
- // e = encoder (nsIUnicodeEncoder*)
- // s = string (PRUnichar*)
- // l = string length (PRInt32)
- // sb = static buffer (char[])
- // sbl = static buffer length (PRUint32)
- // al = actual buffer length (PRInt32)
- //
- #define ENCODER_BUFFER_ALLOC_IF_NEEDED(p,e,s,l,sb,sbl,al) \
- PR_BEGIN_MACRO \
- if (e \
- && NS_SUCCEEDED((e)->GetMaxLength((s), (l), &(al)))\
- && ((al) > (PRInt32)(sbl)) \
- && (nsnull!=((p)=(char*)nsMemory::Alloc((al)+1))) \
- ) { \
- } \
- else { \
- (p) = (char*)(sb); \
- (al) = (sbl); \
- } \
- PR_END_MACRO
-
- //
- // Free the Encoder buffer if it was allocated
- //
- #define ENCODER_BUFFER_FREE_IF_NEEDED(p,sb) \
- PR_BEGIN_MACRO \
- if ((p) != (char*)(sb)) \
- nsMemory::Free(p); \
- PR_END_MACRO
-
- /**
- * Interface for a Converter from Unicode into a Charset.
- *
- * @created 23/Nov/1998
- * @author Catalin Rotaru [CATA]
- */
- class nsIUnicodeEncoder : public nsISupports
- {
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IUNICODEENCODER_IID)
-
- enum {
- kOnError_Signal, // on an error, stop and signal
- kOnError_CallBack, // on an error, call the error handler
- kOnError_Replace // on an error, replace with a different character
- };
-
- /**
- * Converts the data from Unicode to a Charset.
- *
- * About the byte ordering:
- * - The input stream is Unicode, having the byte order which is internal
- * for the machine on which the converter is running on.
- * - For output, if the converter cares (that depends of the charset, for
- * example a singlebyte will ignore the byte ordering) it should assume
- * network order. If necessary and requested, we can add a method
- * SetOutputByteOrder() so that the reverse order can be used, too. That
- * method would have as default the assumed network order.
- *
- * Unless there is not enough output space, this method must consume all the
- * available input data! We don't have partial input for the Unicode charset.
- * And for the last converted char, even if there is not enought output
- * space, a partial ouput must be done until all available space will be
- * used. The rest of the output should be buffered until more space becomes
- * available. But this is not also true about the error handling method!!!
- * So be very, very careful...
- *
- * @param aSrc [IN] the source data buffer
- * @param aSrcLength [IN/OUT] the length of source data buffer; after
- * conversion will contain the number of Unicode
- * characters read
- * @param aDest [OUT] the destination data buffer
- * @param aDestLength [IN/OUT] the length of the destination data buffer;
- * after conversion will contain the number of bytes
- * written
- * @return NS_OK_UENC_MOREOUTPUT if only a partial conversion
- * was done; more output space is needed to continue
- * NS_ERROR_UENC_NOMAPPING if character without mapping
- * was encountered and the behavior was set to "signal".
- */
- NS_IMETHOD Convert(const PRUnichar * aSrc, PRInt32 * aSrcLength,
- char * aDest, PRInt32 * aDestLength) = 0;
-
- /**
- * Finishes the conversion. The converter has the possibility to write some
- * extra data and flush its final state.
- *
- * @param aDest [OUT] the destination data buffer
- * @param aDestLength [IN/OUT] the length of destination data buffer; after
- * conversion it will contain the number of bytes written
- * @return NS_OK_UENC_MOREOUTPUT if only a partial conversion
- * was done; more output space is needed to continue
- */
- NS_IMETHOD Finish(char * aDest, PRInt32 * aDestLength) = 0;
-
- /**
- * Returns a quick estimation of the size of the buffer needed to hold the
- * converted data. Remember: this estimation is >= with the actual size of
- * the buffer needed. It will be computed for the "worst case"
- *
- * @param aSrc [IN] the source data buffer
- * @param aSrcLength [IN] the length of source data buffer
- * @param aDestLength [OUT] the needed size of the destination buffer
- * @return NS_OK_UENC_EXACTLENGTH if an exact length was computed
- * NS_OK if all we have is an approximation
- */
- NS_IMETHOD GetMaxLength(const PRUnichar * aSrc, PRInt32 aSrcLength,
- PRInt32 * aDestLength) = 0;
-
- /**
- * Resets the charset converter so it may be recycled for a completely
- * different and urelated buffer of data.
- */
- NS_IMETHOD Reset() = 0;
-
- /**
- * Specify what to do when a character cannot be mapped into the dest charset
- *
- * @param aOrder [IN] the behavior; taken from the enum
- */
- NS_IMETHOD SetOutputErrorBehavior(PRInt32 aBehavior,
- nsIUnicharEncoder * aEncoder, PRUnichar aChar) = 0;
- };
-
- #endif /* nsIUnicodeEncoder_h___ */
-