gecko-dev/intl/uconv/util/umap.c

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7.5 KiB
C
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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
/* #include "PRIntlpriv.h" */
#include "unicpriv.h"
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typedef PRUint16 (* MapFormatFunc)(PRUint16 in,const uTable *uT,const uMapCell *cell);
typedef PRBool (* HitFormateFunc)(PRUint16 in,const uMapCell *cell);
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typedef void (* FillInfoFormateFunc)(const uTable *uT, const uMapCell *cell, PRUint32* info);
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PRIVATE PRBool uHitFormate0(PRUint16 in,const uMapCell *cell);
PRIVATE PRBool uHitFormate2(PRUint16 in,const uMapCell *cell);
PRIVATE PRUint16 uMapFormate0(PRUint16 in,const uTable *uT,const uMapCell *cell);
PRIVATE PRUint16 uMapFormate1(PRUint16 in,const uTable *uT,const uMapCell *cell);
PRIVATE PRUint16 uMapFormate2(PRUint16 in,const uTable *uT,const uMapCell *cell);
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PRIVATE void uFillInfoFormate0(const uTable *uT,const uMapCell *cell,PRUint32* aInfo);
PRIVATE void uFillInfoFormate1(const uTable *uT,const uMapCell *cell,PRUint32* aInfo);
PRIVATE void uFillInfoFormate2(const uTable *uT,const uMapCell *cell,PRUint32* aInfo);
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PRIVATE const uMapCell *uGetMapCell(const uTable *uT, PRInt16 item);
PRIVATE char uGetFormat(const uTable *uT, PRInt16 item);
/*=================================================================================
=================================================================================*/
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PRIVATE const MapFormatFunc m_map[uNumFormatTag] =
{
uMapFormate0,
uMapFormate1,
uMapFormate2,
};
/*=================================================================================
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=================================================================================*/
PRIVATE const FillInfoFormateFunc m_fillinfo[uNumFormatTag] =
{
uFillInfoFormate0,
uFillInfoFormate1,
uFillInfoFormate2,
};
/*=================================================================================
=================================================================================*/
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PRIVATE const HitFormateFunc m_hit[uNumFormatTag] =
{
uHitFormate0,
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uHitFormate0,
uHitFormate2,
};
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#define uHit(format,in,cell) (* m_hit[(format)])((in),(cell))
#define uMap(format,in,uT,cell) (* m_map[(format)])((in),(uT),(cell))
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#define uFillInfoCell(format,uT,cell,info) (* m_fillinfo[(format)])((uT),(cell),(info))
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#define uGetMapCell(uT, item) ((uMapCell *)(((PRUint16 *)uT) + (uT)->offsetToMapCellArray) + (item))
#define uGetFormat(uT, item) (((((PRUint16 *)uT) + (uT)->offsetToFormatArray)[(item)>> 2 ] >> (((item)% 4 ) << 2)) & 0x0f)
/*=================================================================================
=================================================================================*/
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MODULE_PRIVATE void uFillInfo(const uTable *uT, PRUint32* aInfo)
{
PRUint16 itemOfList = uT->itemOfList;
PRUint16 i;
for(i=0;i<itemOfList;i++)
{
const uMapCell* uCell;
PRInt8 format = uGetFormat(uT,i);
uCell = uGetMapCell(uT,i);
uFillInfoCell(format, uT, uCell, aInfo);
}
}
/*=================================================================================
=================================================================================*/
MODULE_PRIVATE PRBool uMapCode(const uTable *uT, PRUint16 in, PRUint16* out)
{
PRBool done = PR_FALSE;
PRUint16 itemOfList = uT->itemOfList;
PRUint16 i;
*out = NOMAPPING;
for(i=0;i<itemOfList;i++)
{
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const uMapCell* uCell;
PRInt8 format = uGetFormat(uT,i);
uCell = uGetMapCell(uT,i);
if(uHit(format, in, uCell))
{
*out = uMap(format, in, uT,uCell);
done = PR_TRUE;
break;
}
}
return ( done && (*out != NOMAPPING));
}
/*
member function
*/
/*=================================================================================
=================================================================================*/
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PRIVATE PRBool uHitFormate0(PRUint16 in,const uMapCell *cell)
{
return ( (in >= cell->fmt.format0.srcBegin) &&
(in <= cell->fmt.format0.srcEnd) ) ;
}
/*=================================================================================
=================================================================================*/
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PRIVATE PRBool uHitFormate2(PRUint16 in,const uMapCell *cell)
{
return (in == cell->fmt.format2.srcBegin);
}
/*=================================================================================
=================================================================================*/
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PRIVATE PRUint16 uMapFormate0(PRUint16 in,const uTable *uT,const uMapCell *cell)
{
return ((in - cell->fmt.format0.srcBegin) + cell->fmt.format0.destBegin);
}
/*=================================================================================
=================================================================================*/
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PRIVATE PRUint16 uMapFormate1(PRUint16 in,const uTable *uT,const uMapCell *cell)
{
return (*(((PRUint16 *)uT) + uT->offsetToMappingTable
+ cell->fmt.format1.mappingOffset + in - cell->fmt.format1.srcBegin));
}
/*=================================================================================
=================================================================================*/
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PRIVATE PRUint16 uMapFormate2(PRUint16 in,const uTable *uT,const uMapCell *cell)
{
return (cell->fmt.format2.destBegin);
}
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#define SET_REPRESENTABLE(info, c) (info)[(c) >> 5] |= (1L << ((c) & 0x1f))
/*=================================================================================
=================================================================================*/
PRIVATE void uFillInfoFormate0(const uTable *uT,const uMapCell *cell,PRUint32* info)
{
PRUint16 begin, end, i;
begin = cell->fmt.format0.srcBegin;
end = cell->fmt.format0.srcEnd;
if( (begin >> 5) == (end >> 5)) /* High 17 bits are the same */
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{
for(i = begin; i <= end; i++)
SET_REPRESENTABLE(info, i);
} else {
PRUint32 b = begin >> 5;
PRUint32 e = end >> 5;
info[ b ] |= (0xFFFFFFFFL << ((begin) & 0x1f));
info[ e ] |= (0xFFFFFFFFL >> (31 - ((end) & 0x1f)));
for(b++ ; b < e ; b++)
info[b] |= 0xFFFFFFFFL;
}
}
/*=================================================================================
=================================================================================*/
PRIVATE void uFillInfoFormate1(const uTable *uT,const uMapCell *cell,PRUint32* info)
{
PRUint16 begin, end, i;
PRUint16 *base;
begin = cell->fmt.format0.srcBegin;
end = cell->fmt.format0.srcEnd;
base = (((PRUint16 *)uT) + uT->offsetToMappingTable + cell->fmt.format1.mappingOffset);
for(i = begin; i <= end; i++)
{
if(0xFFFD != base[i - begin]) /* check every item */
SET_REPRESENTABLE(info, i);
}
}
/*=================================================================================
=================================================================================*/
PRIVATE void uFillInfoFormate2(const uTable *uT,const uMapCell *cell,PRUint32* info)
{
SET_REPRESENTABLE(info, cell->fmt.format2.srcBegin);
}