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50 lines
1.4 KiB
C
50 lines
1.4 KiB
C
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/* -*- Mode: C; tab-width: 4; 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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/* detectu2.c */
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#include "intlpriv.h"
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#include "xp.h"
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#include "libi18n.h"
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/*
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This function returns csid if it finds that the data is UCS-2 or
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UCS-2 needs swap.
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*/
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#define UCS2_GIVEUP_COUNT 512 /* Test at most 512 byte */
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#define UCS2_00_TRIGGER 8 /* Need at least 4 0x00 to make our sample meanful */
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#define UCS2_DETECT_DIFF 4
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MODULE_PRIVATE int DetectUCS2(CCCDataObject obj, unsigned char *pSrc, int len)
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{
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/* need to fix DetectUCS2 to look for UTF8 */
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if(len < 2) return(CS_DEFAULT);
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if(((pSrc[0]<<8) | pSrc[1]) == BYTE_ORDER_MARK)
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return(CS_UCS2);
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if(((pSrc[0]<<8) | pSrc[1]) == NEEDS_SWAP_MARK)
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return(CS_UCS2_SWAP);
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return(CS_DEFAULT);
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}
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