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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 nsIUnicodeDecoder_h___
- #define nsIUnicodeDecoder_h___
-
- #include "nscore.h"
- #include "nsISupports.h"
-
- // Interface ID for our Unicode Decoder interface
- // {B2F178E1-832A-11d2-8A8E-00600811A836}
- //NS_DECLARE_ID(kIUnicodeDecoderIID,
- // 0xb2f178e1, 0x832a, 0x11d2, 0x8a, 0x8e, 0x0, 0x60, 0x8, 0x11, 0xa8, 0x36);
-
- #define NS_IUNICODEDECODER_IID \
- { 0xb2f178e1, 0x832a, 0x11d2, \
- { 0x8a, 0x8e, 0x0, 0x60, 0x8, 0x11, 0xa8, 0x36 }}
-
- // XXX deprecated
- /*---------- BEGIN DEPRECATED */
- #define NS_EXACT_LENGTH \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 11)
-
- #define NS_PARTIAL_MORE_INPUT \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 12)
-
- #define NS_PARTIAL_MORE_OUTPUT \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 13)
-
- #define NS_ERROR_ILLEGAL_INPUT \
- NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_UCONV, 14)
- /*---------- END DEPRECATED */
-
- // XXX make us hex! (same digits though)
- #define NS_OK_UDEC_EXACTLENGTH \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 11)
-
- #define NS_OK_UDEC_MOREINPUT \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 12)
-
- #define NS_OK_UDEC_MOREOUTPUT \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 13)
-
- #define NS_ERROR_UDEC_ILLEGALINPUT \
- NS_ERROR_GENERATE_FAILURE(NS_ERROR_MODULE_UCONV, 14)
-
- #define NS_OK_UDEC_NOBOMFOUND \
- NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_UCONV, 14)
-
-
- #define NS_UNICODEDECODER_CONTRACTID_BASE "@mozilla.org/intl/unicode/decoder;1?charset="
-
- /**
- * Interface for a Converter from a Charset into Unicode.
- *
- * @created 23/Nov/1998
- * @author Catalin Rotaru [CATA]
- */
- class nsIUnicodeDecoder : public nsISupports
- {
- public:
- NS_DEFINE_STATIC_IID_ACCESSOR(NS_IUNICODEDECODER_IID)
-
- enum {
- kOnError_Recover, // on an error, recover and continue
- kOnError_Signal // on an error, stop and signal
- };
-
- /**
- * Converts the data from one Charset to Unicode.
- *
- * About the byte ordering:
- * - For input, 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
- * SetInputByteOrder() so that the reverse order can be used, too. That
- * method would have as default the assumed network order.
- * - The output stream is Unicode, having the byte order which is internal
- * for the machine on which the converter is running on.
- *
- * Unless there is not enough output space, this method must consume all the
- * available input data! The eventual incomplete final character data will be
- * stored internally in the converter and used when the method is called
- * again for continuing the conversion. This way, the caller will not have to
- * worry about managing incomplete input data by mergeing it with the next
- * buffer.
- *
- * Error conditions:
- * If the read value does not belong to this character set, one should
- * replace it with the Unicode special 0xFFFD. When an actual input error is
- * encountered, like a format error, the converter stop and return error.
- * Hoever, we should keep in mind that we need to be lax in decoding.
- *
- * Converter required behavior:
- * In this order: when output space is full - return right away. When input
- * data is wrong, return input pointer right after the wrong byte. When
- * partial input, it will be consumed and cached. All the time input pointer
- * will show how much was actually consumed and how much was actually
- * written.
- *
- * @param aSrc [IN] the source data buffer
- * @param aSrcLength [IN/OUT] the length of source data buffer; after
- * conversion will contain the number of bytes 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 Unicode
- * characters written
- * @return NS_PARTIAL_MORE_INPUT if only a partial conversion was
- * done; more input is needed to continue
- * NS_PARTIAL_MORE_OUTPUT if only a partial conversion
- * was done; more output space is needed to continue
- * NS_ERROR_ILLEGAL_INPUT if an illegal input sequence
- * was encountered and the behavior was set to "signal"
- */
- NS_IMETHOD Convert(const char * aSrc, PRInt32 * aSrcLength,
- PRUnichar * 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_EXACT_LENGTH if an exact length was computed
- * NS_OK is all we have is an approximation
- */
- NS_IMETHOD GetMaxLength(const char * 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;
- };
-
- #endif /* nsIUnicodeDecoder_h___ */
-