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2f2ae146c0
RetroZilla/intl/unicharutil/util/nsCompressedCharMap.cpp
Ryan Nematz 2f2ae146c0 first commit
2015-10-20 23:03:22 -04:00

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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) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Brian Stell <bstell@netscape.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 <stdio.h>
#include "prmem.h"
#include "nsCRT.h"
#include "nsICharRepresentable.h"
#include "nsCompressedCharMap.h"
void
FreeCCMap(PRUint16* &aMap)
{
if (!aMap)
return;
PR_Free(aMap - CCMAP_EXTRA);
aMap = nsnull;
}
PRUint16*
MapToCCMap(PRUint32* aMap)
{
// put the data into a temp map
nsCompressedCharMap ccmapObj;
ccmapObj.SetChars(aMap);
PRUint16 *ccmap = (PRUint16*)PR_Malloc((CCMAP_EXTRA + ccmapObj.GetSize()) * sizeof(PRUint16));
NS_ASSERTION(ccmap, "failed to alloc new CCMap");
if (!ccmap)
return nsnull;
ccmap += CCMAP_EXTRA;
CCMAP_SIZE(ccmap) = ccmapObj.GetSize();
CCMAP_FLAG(ccmap) = CCMAP_NONE_FLAG;
ccmapObj.FillCCMap(ccmap);
#ifdef DEBUG
for (int i=0; i<NUM_UNICODE_CHARS; i++) {
PRBool oldb = IS_REPRESENTABLE(aMap, i);
PRBool newb = CCMAP_HAS_CHAR(ccmap, i);
if ((oldb) != (newb)) {
NS_ASSERTION(oldb==newb,"failed to generate map correctly");
}
}
#endif
return ccmap;
}
PRUint16* CreateEmptyCCMap()
{
PRUint16 *ccmap = (PRUint16*)PR_Malloc((CCMAP_EXTRA + 16) * sizeof(PRUint16));
NS_ASSERTION(ccmap, "failed to alloc new CCMap");
if (!ccmap)
return nsnull;
memset(ccmap, '\0', CCMAP_EMPTY_SIZE_PER_INT16 * sizeof(PRUint16)+ CCMAP_EXTRA);
ccmap += CCMAP_EXTRA;
CCMAP_SIZE(ccmap) = CCMAP_EMPTY_SIZE_PER_INT16;
CCMAP_FLAG(ccmap) = CCMAP_NONE_FLAG;
return ccmap;
}
PRUint16*
MapperToCCMap(nsICharRepresentable *aMapper)
{
PRUint32 map[UCS2_MAP_LEN];
memset(map, 0, sizeof(map));
nsresult res = aMapper->FillInfo(map);
if (NS_FAILED(res))
return nsnull;
PRUint16* ccMap = MapToCCMap(map);
return ccMap;
}
PRBool
NextNonEmptyCCMapPage(const PRUint16* aCCMap, PRUint32 *aPageStart)
{
int i, j, l;
int planeend = 0;
int planestart = 0;
unsigned int k;
const PRUint16* ccmap;
PRUint32 pagestart = *aPageStart;
if(CCMAP_FLAG(aCCMap) & CCMAP_SURROGATE_FLAG) {
// for SURROGATE
planeend = EXTENDED_UNICODE_PLANES;
}
if(pagestart != CCMAP_BEGIN_AT_START_OF_MAP) {
planestart = CCMAP_PLANE(pagestart);
}
// checking each plane
for(l=planestart; l<=planeend; l++, pagestart = CCMAP_BEGIN_AT_START_OF_MAP) {
if(l != 0 && CCMAP_FLAG(aCCMap) & CCMAP_SURROGATE_FLAG) {
// for SURROGATE - get ccmap per plane
ccmap = CCMAP_FOR_PLANE_EXT(aCCMap, l);
} else {
// only BMP
ccmap = aCCMap;
}
//
// Point to the next page
//
unsigned int upper_index;
unsigned int mid_index;
if (pagestart == CCMAP_BEGIN_AT_START_OF_MAP) {
upper_index = 0;
mid_index = 0;
} else {
upper_index = CCMAP_UPPER_INDEX(pagestart & 0xffff);
mid_index = CCMAP_MID_INDEX(pagestart & 0xffff) + 1;
}
// walk thru the upper pointers
const PRUint16 *upper = &ccmap[0];
for (i=upper_index; i<CCMAP_NUM_UPPER_POINTERS; i++, mid_index=0) {
if (upper[i] == CCMAP_EMPTY_MID) {
continue;
}
// walk the mid array
const PRUint16 *mid = &ccmap[upper[i]];
for (j=mid_index; j<CCMAP_NUM_MID_POINTERS; j++) {
if (mid[j] == CCMAP_EMPTY_PAGE)
continue;
// walk the page
const ALU_TYPE *page = (ALU_TYPE*)&ccmap[mid[j]];
for (k=0; k<CCMAP_NUM_ALUS_PER_PAGE; k++) {
if (page[k] != 0) {
PRUint32 base = (i*CCMAP_NUM_UCHARS_PER_MID) + (j*CCMAP_NUM_UCHARS_PER_PAGE);
NS_ASSERTION(base<NUM_UNICODE_CHARS, "invalid page address");
// return exact UCS4 code point, plane number + base
*aPageStart = (((PRUint32)l)<<16)+base;
return PR_TRUE;
}
}
}
}
}
return PR_FALSE;
}
#define CCMAP_MID_OFFSET(m, i) ((m)[i])
#define CCMAP_PAGE_OFFSET_FROM_MIDOFFSET(m, midoffset, i) ((m)[(i) + (midoffset)])
/***********************************************************************************
*compare 2 ccmap and see if they are exactly the same
* Here I assume both ccmap is generated by
* nsCompressedCharMap::SetChars(PRUint32* aMap)
* This funtion rely on current implementation of above function. The that changed,
* we might need to revisit this implementation.
***********************************************************************************/
PRBool IsSameCCMap(PRUint16* ccmap1, PRUint16* ccmap2)
{
PRUint16 len1 = CCMAP_SIZE(ccmap1);
PRUint16 len2 = CCMAP_SIZE(ccmap2);
if (len1 != len2)
return PR_FALSE;
if (memcmp(ccmap1, ccmap2, sizeof(PRUint16)*len1))
return PR_FALSE;
return PR_TRUE;
}
PRUint16*
nsCompressedCharMap::NewCCMap()
{
if (mExtended) {
return MapToCCMapExt(mMap, mExtMap+1, EXTENDED_UNICODE_PLANES);
} else {
PRUint16 *newMap = (PRUint16*)PR_Malloc((CCMAP_EXTRA + mUsedLen) * sizeof(PRUint16));
NS_ASSERTION(newMap, "failed to alloc new CCMap");
if (!newMap)
return nsnull;
newMap += CCMAP_EXTRA;
CCMAP_SIZE(newMap) = GetSize();
CCMAP_FLAG(newMap) = CCMAP_NONE_FLAG;
FillCCMap(newMap);
return newMap;
}
}
PRUint16*
nsCompressedCharMap::FillCCMap(PRUint16* aCCMap)
{
// transfer the data
for (int i=0; i<mUsedLen; i++)
aCCMap[i] = u.mCCMap[i];
return aCCMap;
}
nsCompressedCharMap::~nsCompressedCharMap()
{
if(mExtended){
int i;
for (i = 1; i <= EXTENDED_UNICODE_PLANES; ++i) {
if (mExtMap[i]) {
PR_Free(mExtMap[i]);
}
}
}
}
nsCompressedCharMap::nsCompressedCharMap()
{
// initialize map to have:
// 1 upper pointer array
// 1 empty mid pointer array
// 1 empty page
int i;
memset(u.mCCMap, 0, sizeof(u.mCCMap));
mUsedLen = 0;
mAllOnesPage = 0;
// init the upper pointers
PRUint16 *upper = &u.mCCMap[0];
for (i=0; i<CCMAP_NUM_UPPER_POINTERS; i++) {
upper[i] = CCMAP_EMPTY_MID;
}
mUsedLen += CCMAP_NUM_UPPER_POINTERS;
// init the empty mid
NS_ASSERTION(mUsedLen==CCMAP_EMPTY_MID, "empty mid offset misconfigured");
PRUint16 *mid = &u.mCCMap[CCMAP_EMPTY_MID];
for (i=0; i<CCMAP_NUM_MID_POINTERS; i++) {
mid[i] = CCMAP_EMPTY_PAGE;
}
mUsedLen += CCMAP_NUM_MID_POINTERS;
// init the empty page
NS_ASSERTION(mUsedLen==CCMAP_EMPTY_PAGE, "empty page offset misconfigured");
// the page was zero'd by the memset above
mUsedLen += CCMAP_NUM_PRUINT16S_PER_PAGE;
// init extended
mExtended = PR_FALSE;
memset(mExtMap+1, 0, sizeof(PRUint32*) * EXTENDED_UNICODE_PLANES);
memset(mMap, 0, sizeof(mMap));
mExtMap[0] = mMap;
}
void
nsCompressedCharMap::SetChar(PRUint32 aChar)
{
if (mExtended) {
PRUint32 plane_num = CCMAP_PLANE(aChar);
NS_ASSERTION(plane_num <= EXTENDED_UNICODE_PLANES,"invalid plane");
if (plane_num <= EXTENDED_UNICODE_PLANES) {
if (mExtMap[plane_num] == 0) {
mExtMap[plane_num] = (PRUint32*)PR_Malloc(sizeof(PRUint32)*UCS2_MAP_LEN);
NS_ASSERTION(mExtMap[plane_num], "failed to alloc new mExtMap");
if (!mExtMap[plane_num]) {
return;
}
memset(mExtMap[plane_num], 0, sizeof(PRUint32)*UCS2_MAP_LEN);
}
SET_REPRESENTABLE(mExtMap[plane_num], aChar & 0xffff);
}
} else {
NS_ASSERTION(aChar <= 0xffff, "extended char is passed");
unsigned int i;
unsigned int upper_index = CCMAP_UPPER_INDEX(aChar);
unsigned int mid_index = CCMAP_MID_INDEX(aChar);
PRUint16 mid_offset = u.mCCMap[upper_index];
if (mid_offset == CCMAP_EMPTY_MID) {
mid_offset = u.mCCMap[upper_index] = mUsedLen;
mUsedLen += CCMAP_NUM_MID_POINTERS;
NS_ASSERTION(mUsedLen<=CCMAP_MAX_LEN,"length too long");
// init the mid
PRUint16 *mid = &u.mCCMap[mid_offset];
for (i=0; i<CCMAP_NUM_MID_POINTERS; i++) {
NS_ASSERTION(mid[i]==0, "this mid pointer should be unused");
mid[i] = CCMAP_EMPTY_PAGE;
}
}
PRUint16 page_offset = u.mCCMap[mid_offset+mid_index];
if (page_offset == CCMAP_EMPTY_PAGE) {
page_offset = u.mCCMap[mid_offset+mid_index] = mUsedLen;
mUsedLen += CCMAP_NUM_PRUINT16S_PER_PAGE;
NS_ASSERTION(mUsedLen<=CCMAP_MAX_LEN,"length too long");
// init the page
PRUint16 *page = &u.mCCMap[page_offset];
for (i=0; i<CCMAP_NUM_PRUINT16S_PER_PAGE; i++) {
NS_ASSERTION(page[i]==0, "this page should be unused");
page[i] = 0;
}
}
#undef CCMAP_SET_CHAR
#define CCMAP_SET_CHAR(m,c) (CCMAP_TO_ALU(m,c) |= (CCMAP_POW2(CCMAP_BIT_INDEX(c))))
CCMAP_SET_CHAR(u.mCCMap,aChar);
#undef CCMAP_SET_CHAR
NS_ASSERTION(CCMAP_HAS_CHAR(u.mCCMap,aChar), "failed to set bit");
}
}
void
nsCompressedCharMap::SetChars(PRUint16 aBase, ALU_TYPE* aPage)
{
unsigned int i;
unsigned int upper_index = CCMAP_UPPER_INDEX(aBase);
unsigned int mid_index = CCMAP_MID_INDEX(aBase);
NS_ASSERTION((aBase&CCMAP_PAGE_MASK)==0, "invalid page address");
//
// check of none/all bits set
//
PRUint16 num_none_set = 0;
PRUint16 num_all_set = 0;
for (i=0; i<CCMAP_NUM_ALUS_PER_PAGE; i++) {
if (aPage[i] == 0)
num_none_set++;
else if (aPage[i] == CCMAP_ALU_MASK)
num_all_set++;
}
if (num_none_set == CCMAP_NUM_ALUS_PER_PAGE) {
return;
}
//
// Alloc mid if necessary
//
PRUint16 mid_offset = u.mCCMap[upper_index];
if (mid_offset == CCMAP_EMPTY_MID) {
mid_offset = u.mCCMap[upper_index] = mUsedLen;
mUsedLen += CCMAP_NUM_MID_POINTERS;
NS_ASSERTION(mUsedLen<=CCMAP_MAX_LEN,"length too long");
// init the mid
PRUint16 *mid = &u.mCCMap[mid_offset];
for (i=0; i<CCMAP_NUM_MID_POINTERS; i++) {
NS_ASSERTION(mid[i]==0, "this mid pointer should be unused");
mid[i] = CCMAP_EMPTY_PAGE;
}
}
//
// if all bits set share an "all bits set" page
//
if (num_all_set == CCMAP_NUM_ALUS_PER_PAGE) {
if (mAllOnesPage == 0) {
mAllOnesPage = mUsedLen;
mUsedLen += CCMAP_NUM_PRUINT16S_PER_PAGE;
NS_ASSERTION(mUsedLen<=CCMAP_MAX_LEN,"length too long");
ALU_TYPE *all_ones_page = (ALU_TYPE*)&u.mCCMap[mAllOnesPage];
for (i=0; i<CCMAP_NUM_ALUS_PER_PAGE; i++) {
NS_ASSERTION(all_ones_page[i]==0, "this page should be unused");
all_ones_page[i] = CCMAP_ALU_MASK;
}
}
u.mCCMap[mid_offset+mid_index] = mAllOnesPage;
return;
}
//
// Alloc page if necessary
//
PRUint16 page_offset = u.mCCMap[mid_offset+mid_index];
if (page_offset == CCMAP_EMPTY_PAGE) {
page_offset = u.mCCMap[mid_offset+mid_index] = mUsedLen;
mUsedLen += CCMAP_NUM_PRUINT16S_PER_PAGE;
NS_ASSERTION(mUsedLen<=CCMAP_MAX_LEN,"length too long");
}
// copy the page data
ALU_TYPE *page = (ALU_TYPE*)&u.mCCMap[page_offset];
for (i=0; i<CCMAP_NUM_ALUS_PER_PAGE; i++) {
NS_ASSERTION(page[i]==0, "this page should be unused");
page[i] = aPage[i];
}
}
void
nsCompressedCharMap::SetChars(PRUint16* aCCMap)
{
int i, j;
if(mExtended){
PRUint32 page = CCMAP_BEGIN_AT_START_OF_MAP;
while (NextNonEmptyCCMapPage(aCCMap, &page)) {
PRUint32 pagechar = page;
for (i=0; i<(CCMAP_BITS_PER_PAGE/8); i++) {
for (j=0; j<8; j++) {
if (CCMAP_HAS_CHAR_EXT(aCCMap, pagechar)) {
SetChar(pagechar);
}
pagechar++;
}
}
}
} else {
//
// Copy the input CCMap
//
// walk thru the upper pointers
PRUint16 *upper = &aCCMap[0];
for (i=0; i<CCMAP_NUM_UPPER_POINTERS; i++) {
if (upper[i] == CCMAP_EMPTY_MID)
continue;
// walk the mid array
PRUint16 *mid = &aCCMap[upper[i]];
for (j=0; j<CCMAP_NUM_MID_POINTERS; j++) {
if (mid[j] == CCMAP_EMPTY_PAGE)
continue;
PRUint32 base = (i*CCMAP_NUM_UCHARS_PER_MID) + (j*CCMAP_NUM_UCHARS_PER_PAGE);
NS_ASSERTION(base<NUM_UNICODE_CHARS, "invalid page address");
ALU_TYPE *page = (ALU_TYPE*)&aCCMap[mid[j]];
SetChars((PRUint16)base, page);
}
}
}
}
void
nsCompressedCharMap::SetChars(PRUint32* aMap)
{
PRUint32* frommap_page;
frommap_page = aMap;
PRUint16 base = 0;
for (int i=0; i<CCMAP_TOTAL_PAGES; i++) {
#if (CCMAP_BITS_PER_ALU == CCMAP_BITS_PER_PRUINT32)
SetChars(base, (ALU_TYPE*)frommap_page);
frommap_page += CCMAP_PRUINT32S_PER_PAGE;
#elif (CCMAP_BITS_PER_ALU > CCMAP_BITS_PER_PRUINT32)
int j, k = CCMAP_BITS_PER_PRUINT32;
ALU_TYPE page[CCMAP_NUM_ALUS_PER_PAGE];
ALU_TYPE *p = page;
for (j=0; j<CCMAP_ALUS_PER_PAGE; j++) {
ALU_TYPE alu_val = 0;
ALU_TYPE tmp;
for (k=0; k<CCMAP_PRUINT32S_PER_ALU; k++) {
tmp = *frommap_page;
tmp <<= (k*CCMAP_BITS_PER_PRUINT32);
//alu_val |= (*frommap_page)<<(k*CCMAP_BITS_PER_PRUINT32);
alu_val |= tmp;
frommap_page++;
}
*p++ = alu_val;
}
SetChars(base, page);
#elif (CCMAP_BITS_PER_ALU < CCMAP_BITS_PER_PRUINT32)
int j, k;
ALU_TYPE page[CCMAP_NUM_ALUS_PER_PAGE];
int v = CCMAP_PRUINT32S_PER_PAGE;
ALU_TYPE *p = page;
for (j=0; j<CCMAP_PRUINT32S_PER_PAGE; j++) {
PRUint32 pruint32_val = *frommap_page++;
for (k=0; k<CCMAP_ALUS_PER_PRUINT32; k++) {
*p++ = pruint32_val & CCMAP_ALU_MASK;
pruint32_val >>= CCMAP_BITS_PER_ALU;
}
}
SetChars(base, page);
#endif
base += CCMAP_NUM_UCHARS_PER_PAGE;
}
}
#ifdef DEBUG
void
printCCMap(PRUint16* aCCMap)
{
PRUint32 page = CCMAP_BEGIN_AT_START_OF_MAP;
while (NextNonEmptyCCMapPage(aCCMap, &page)) {
//FONT_SCAN_PRINTF(("page starting at 0x%04x has chars", page));
int i;
PRUint32 pagechar = page;
printf("CCMap:0x%04lx=", (long)page);
for (i=0; i<(CCMAP_BITS_PER_PAGE/8); i++) {
unsigned char val = 0;
for (int j=0; j<8; j++) {
if (CCMAP_HAS_CHAR(aCCMap, pagechar)) {
val |= 1 << j;
}
pagechar++;
}
printf("%02x", val);
}
printf("\n");
}
}
#endif
// Non-BMP unicode support extension, create ccmap for both BMP and extended planes
PRUint16*
MapToCCMapExt(PRUint32* aBmpPlaneMap, PRUint32** aOtherPlaneMaps, PRUint32 aOtherPlaneNum)
{
nsCompressedCharMap* otherPlaneObj[EXTENDED_UNICODE_PLANES];
PRUint32 totalSize;
PRUint16 i;
PRUint32 *planeCCMapOffsets;
PRUint32 currOffset;
NS_ASSERTION(aOtherPlaneNum <= EXTENDED_UNICODE_PLANES, "illegal argument value");
if (aOtherPlaneNum > EXTENDED_UNICODE_PLANES)
return nsnull;
// Put the data into a temp map
nsCompressedCharMap bmpCcmapObj;
bmpCcmapObj.SetChars(aBmpPlaneMap);
// Add bmp size
totalSize = bmpCcmapObj.GetSize();
// Add bmp length field
totalSize += CCMAP_EXTRA;
// Add Plane array
totalSize += EXTENDED_UNICODE_PLANES * sizeof(PRUint32)/sizeof(PRUint16);
// Add an empty plane ccmap
// A totally empty plane ccmap can be represented by 16 *(PRUint16)0.
totalSize += CCMAP_EMPTY_SIZE_PER_INT16;
// Create ccmap for other planes
for (i = 0; i < aOtherPlaneNum; i++) {
if (aOtherPlaneMaps[i]) {
otherPlaneObj[i] = new nsCompressedCharMap();
NS_ASSERTION(otherPlaneObj, "unable to create new nsCompressedCharMap");
if(otherPlaneObj) {
otherPlaneObj[i]->SetChars(aOtherPlaneMaps[i]);
totalSize += otherPlaneObj[i]->GetSize();
}
} else {
otherPlaneObj[i] = nsnull;
}
}
PRUint16 *ccmap = (PRUint16*)PR_Malloc(totalSize * sizeof(PRUint16));
NS_ASSERTION(ccmap, "failed to alloc new CCMap");
if (!ccmap)
return nsnull;
// Assign BMP ccmap size
ccmap += CCMAP_EXTRA;
CCMAP_SIZE(ccmap) = bmpCcmapObj.GetSize();
CCMAP_FLAG(ccmap) = CCMAP_SURROGATE_FLAG;
// Fill bmp plane ccmap
bmpCcmapObj.FillCCMap(ccmap);
// Get pointer for plane ccmap offset array
currOffset = bmpCcmapObj.GetSize();
planeCCMapOffsets = (PRUint32*)(ccmap+currOffset);
currOffset += sizeof(PRUint32)/sizeof(PRUint16)*EXTENDED_UNICODE_PLANES;
// Put a empty ccmap there
memset(ccmap+currOffset, '\0', sizeof(PRUint16)*16);
PRUint32 emptyCCMapOffset = currOffset;
currOffset += CCMAP_EMPTY_SIZE_PER_INT16;
// Now fill all rest of the planes' ccmap and put off in array
for (i = 0; i <aOtherPlaneNum; i++) {
if (aOtherPlaneMaps[i] && otherPlaneObj[i]) {
*(planeCCMapOffsets+i) = currOffset;
otherPlaneObj[i]->FillCCMap(ccmap+currOffset);
currOffset += otherPlaneObj[i]->GetSize();
}
else
*(planeCCMapOffsets+i) = emptyCCMapOffset;
}
for (; i < EXTENDED_UNICODE_PLANES; i++) {
*(planeCCMapOffsets+i) = emptyCCMapOffset;
}
// remove all nsCompressedCharMap objects allocated
for (i = 0; i < aOtherPlaneNum; i++) {
if (otherPlaneObj[i])
delete otherPlaneObj[i];
}
#ifdef DEBUG
PRUint32 k, h, l, plane, offset;
PRBool oldb;
PRBool newb;
// testing for BMP plane
for (k=0; k<NUM_UNICODE_CHARS; k++) {
oldb = IS_REPRESENTABLE(aBmpPlaneMap, k);
newb = CCMAP_HAS_CHAR_EXT(ccmap, k);
NS_ASSERTION(oldb==newb,"failed to generate map correctly");
}
//testing for extension plane
for (k = 0x10000; k < 0x100000; k++) {
plane = k/0x10000;
if (plane > aOtherPlaneNum)
break;
if (aOtherPlaneMaps[plane-1])
oldb = IS_REPRESENTABLE(aOtherPlaneMaps[plane-1], k&0xffff);
else
oldb = 0;
newb = CCMAP_HAS_CHAR_EXT(ccmap, k);
NS_ASSERTION(oldb==newb, "failed to generate extension map correctly");
}
// testing for non-BMP plane
for (h = 0; h < 0x400; h++) {
for (l = 0; l < 0x400; l++) {
plane = h >> 6;
offset = (h*0x400 + l) & 0xffff;
if (aOtherPlaneMaps[plane])
oldb = IS_REPRESENTABLE(aOtherPlaneMaps[plane], offset);
else
oldb = 0;
newb = CCMAP_HAS_CHAR_EXT2(ccmap, h+0xd800, l+0xdc00);
NS_ASSERTION(oldb==newb, "failed to generate extension map correctly");
}
}
#endif
return ccmap;
}
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