gecko/intl/uconv/util/umap.c

225 lines
8.5 KiB
C

/* -*- Mode: C; tab-width: 4; 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.org code.
*
* The Initial Developer of the Original Code is
* Netscape.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* jeroen.dobbelaere@acunia.com
*
* 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 ***** */
/* #include "PRIntlpriv.h" */
#include "unicpriv.h"
typedef PRUint16 (* MapFormatFunc)(PRUint16 in,const uTable *uT,const uMapCell *cell);
typedef PRBool (* HitFormateFunc)(PRUint16 in,const uMapCell *cell);
typedef void (* FillInfoFormateFunc)(const uTable *uT, const uMapCell *cell, PRUint32* info);
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);
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);
PRIVATE const uMapCell *uGetMapCell(const uTable *uT, PRInt16 item);
PRIVATE char uGetFormat(const uTable *uT, PRInt16 item);
/*=================================================================================
=================================================================================*/
PRIVATE const MapFormatFunc m_map[uNumFormatTag] =
{
uMapFormate0,
uMapFormate1,
uMapFormate2,
};
/*=================================================================================
=================================================================================*/
PRIVATE const FillInfoFormateFunc m_fillinfo[uNumFormatTag] =
{
uFillInfoFormate0,
uFillInfoFormate1,
uFillInfoFormate2,
};
/*=================================================================================
=================================================================================*/
PRIVATE const HitFormateFunc m_hit[uNumFormatTag] =
{
uHitFormate0,
uHitFormate0,
uHitFormate2,
};
#define uHit(format,in,cell) (* m_hit[(format)])((in),(cell))
#define uMap(format,in,uT,cell) (* m_map[(format)])((in),(uT),(cell))
#define uFillInfoCell(format,uT,cell,info) (* m_fillinfo[(format)])((uT),(cell),(info))
#define uGetMapCell(uT, item) ((uMapCell *)(((PRUint16 *)uT) + (uT)->offsetToMapCellArray + (item)*(UMAPCELL_SIZE/sizeof(PRUint16))))
#define uGetFormat(uT, item) (((((PRUint16 *)uT) + (uT)->offsetToFormatArray)[(item)>> 2 ] >> (((item)% 4 ) << 2)) & 0x0f)
/*=================================================================================
=================================================================================*/
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++)
{
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
*/
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uHitFormate0(PRUint16 in,const uMapCell *cell)
{
return ( (in >= cell->fmt.format0.srcBegin) &&
(in <= cell->fmt.format0.srcEnd) ) ;
}
/*=================================================================================
=================================================================================*/
PRIVATE PRBool uHitFormate2(PRUint16 in,const uMapCell *cell)
{
return (in == cell->fmt.format2.srcBegin);
}
/*=================================================================================
=================================================================================*/
PRIVATE PRUint16 uMapFormate0(PRUint16 in,const uTable *uT,const uMapCell *cell)
{
return ((in - cell->fmt.format0.srcBegin) + cell->fmt.format0.destBegin);
}
/*=================================================================================
=================================================================================*/
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));
}
/*=================================================================================
=================================================================================*/
PRIVATE PRUint16 uMapFormate2(PRUint16 in,const uTable *uT,const uMapCell *cell)
{
return (cell->fmt.format2.destBegin);
}
#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 */
{
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);
}