651 lines
22 KiB
C++
651 lines
22 KiB
C++
|
// © 2016 and later: Unicode, Inc. and others.
|
||
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
||
|
|
/*
|
||
|
|
******************************************************************************
|
||
|
|
*
|
||
|
|
* Copyright (C) 2000-2015, International Business Machines
|
||
|
|
* Corporation and others. All Rights Reserved.
|
||
|
|
*
|
||
|
|
******************************************************************************
|
||
|
|
* file name: ubidiwrt.c
|
||
|
|
* encoding: UTF-8
|
||
|
|
* tab size: 8 (not used)
|
||
|
|
* indentation:4
|
||
|
|
*
|
||
|
|
* created on: 1999aug06
|
||
|
|
* created by: Markus W. Scherer, updated by Matitiahu Allouche
|
||
|
|
*
|
||
|
|
* This file contains implementations for BiDi functions that use
|
||
|
|
* the core algorithm and core API to write reordered text.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "unicode/utypes.h"
|
||
|
|
#include "unicode/ustring.h"
|
||
|
|
#include "unicode/uchar.h"
|
||
|
|
#include "unicode/ubidi.h"
|
||
|
|
#include "unicode/utf16.h"
|
||
|
|
#include "cmemory.h"
|
||
|
|
#include "ustr_imp.h"
|
||
|
|
#include "ubidiimp.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The function implementations in this file are designed
|
||
|
|
* for UTF-16 and UTF-32, not for UTF-8.
|
||
|
|
*
|
||
|
|
* Assumptions that are not true for UTF-8:
|
||
|
|
* - Any code point always needs the same number of code units
|
||
|
|
* ("minimum-length-problem" of UTF-8)
|
||
|
|
* - The BiDi control characters need only one code unit each
|
||
|
|
*
|
||
|
|
* Further assumptions for all UTFs:
|
||
|
|
* - u_charMirror(c) needs the same number of code units as c
|
||
|
|
*/
|
||
|
|
#if defined(UTF_SIZE) && UTF_SIZE==8
|
||
|
|
# error reimplement ubidi_writeReordered() for UTF-8, see comment above
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define IS_COMBINING(type) ((1UL<<(type))&(1UL<<U_NON_SPACING_MARK|1UL<<U_COMBINING_SPACING_MARK|1UL<<U_ENCLOSING_MARK))
|
||
|
|
|
||
|
|
/*
|
||
|
|
* When we have UBIDI_OUTPUT_REVERSE set on ubidi_writeReordered(), then we
|
||
|
|
* semantically write RTL runs in reverse and later reverse them again.
|
||
|
|
* Instead, we actually write them in forward order to begin with.
|
||
|
|
* However, if the RTL run was to be mirrored, we need to mirror here now
|
||
|
|
* since the implicit second reversal must not do it.
|
||
|
|
* It looks strange to do mirroring in LTR output, but it is only because
|
||
|
|
* we are writing RTL output in reverse.
|
||
|
|
*/
|
||
|
|
static int32_t
|
||
|
|
doWriteForward(const UChar *src, int32_t srcLength,
|
||
|
|
UChar *dest, int32_t destSize,
|
||
|
|
uint16_t options,
|
||
|
|
UErrorCode *pErrorCode) {
|
||
|
|
/* optimize for several combinations of options */
|
||
|
|
switch(options&(UBIDI_REMOVE_BIDI_CONTROLS|UBIDI_DO_MIRRORING)) {
|
||
|
|
case 0: {
|
||
|
|
/* simply copy the LTR run to the destination */
|
||
|
|
int32_t length=srcLength;
|
||
|
|
if(destSize<length) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
return srcLength;
|
||
|
|
}
|
||
|
|
do {
|
||
|
|
*dest++=*src++;
|
||
|
|
} while(--length>0);
|
||
|
|
return srcLength;
|
||
|
|
}
|
||
|
|
case UBIDI_DO_MIRRORING: {
|
||
|
|
/* do mirroring */
|
||
|
|
int32_t i=0, j=0;
|
||
|
|
UChar32 c;
|
||
|
|
|
||
|
|
if(destSize<srcLength) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
return srcLength;
|
||
|
|
}
|
||
|
|
do {
|
||
|
|
U16_NEXT(src, i, srcLength, c);
|
||
|
|
c=u_charMirror(c);
|
||
|
|
U16_APPEND_UNSAFE(dest, j, c);
|
||
|
|
} while(i<srcLength);
|
||
|
|
return srcLength;
|
||
|
|
}
|
||
|
|
case UBIDI_REMOVE_BIDI_CONTROLS: {
|
||
|
|
/* copy the LTR run and remove any BiDi control characters */
|
||
|
|
int32_t remaining=destSize;
|
||
|
|
UChar c;
|
||
|
|
do {
|
||
|
|
c=*src++;
|
||
|
|
if(!IS_BIDI_CONTROL_CHAR(c)) {
|
||
|
|
if(--remaining<0) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
|
||
|
|
/* preflight the length */
|
||
|
|
while(--srcLength>0) {
|
||
|
|
c=*src++;
|
||
|
|
if(!IS_BIDI_CONTROL_CHAR(c)) {
|
||
|
|
--remaining;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return destSize-remaining;
|
||
|
|
}
|
||
|
|
*dest++=c;
|
||
|
|
}
|
||
|
|
} while(--srcLength>0);
|
||
|
|
return destSize-remaining;
|
||
|
|
}
|
||
|
|
default: {
|
||
|
|
/* remove BiDi control characters and do mirroring */
|
||
|
|
int32_t remaining=destSize;
|
||
|
|
int32_t i, j=0;
|
||
|
|
UChar32 c;
|
||
|
|
do {
|
||
|
|
i=0;
|
||
|
|
U16_NEXT(src, i, srcLength, c);
|
||
|
|
src+=i;
|
||
|
|
srcLength-=i;
|
||
|
|
if(!IS_BIDI_CONTROL_CHAR(c)) {
|
||
|
|
remaining-=i;
|
||
|
|
if(remaining<0) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
|
||
|
|
/* preflight the length */
|
||
|
|
while(srcLength>0) {
|
||
|
|
c=*src++;
|
||
|
|
if(!IS_BIDI_CONTROL_CHAR(c)) {
|
||
|
|
--remaining;
|
||
|
|
}
|
||
|
|
--srcLength;
|
||
|
|
}
|
||
|
|
return destSize-remaining;
|
||
|
|
}
|
||
|
|
c=u_charMirror(c);
|
||
|
|
U16_APPEND_UNSAFE(dest, j, c);
|
||
|
|
}
|
||
|
|
} while(srcLength>0);
|
||
|
|
return j;
|
||
|
|
}
|
||
|
|
} /* end of switch */
|
||
|
|
}
|
||
|
|
|
||
|
|
static int32_t
|
||
|
|
doWriteReverse(const UChar *src, int32_t srcLength,
|
||
|
|
UChar *dest, int32_t destSize,
|
||
|
|
uint16_t options,
|
||
|
|
UErrorCode *pErrorCode) {
|
||
|
|
/*
|
||
|
|
* RTL run -
|
||
|
|
*
|
||
|
|
* RTL runs need to be copied to the destination in reverse order
|
||
|
|
* of code points, not code units, to keep Unicode characters intact.
|
||
|
|
*
|
||
|
|
* The general strategy for this is to read the source text
|
||
|
|
* in backward order, collect all code units for a code point
|
||
|
|
* (and optionally following combining characters, see below),
|
||
|
|
* and copy all these code units in ascending order
|
||
|
|
* to the destination for this run.
|
||
|
|
*
|
||
|
|
* Several options request whether combining characters
|
||
|
|
* should be kept after their base characters,
|
||
|
|
* whether BiDi control characters should be removed, and
|
||
|
|
* whether characters should be replaced by their mirror-image
|
||
|
|
* equivalent Unicode characters.
|
||
|
|
*/
|
||
|
|
int32_t i, j;
|
||
|
|
UChar32 c;
|
||
|
|
|
||
|
|
/* optimize for several combinations of options */
|
||
|
|
switch(options&(UBIDI_REMOVE_BIDI_CONTROLS|UBIDI_DO_MIRRORING|UBIDI_KEEP_BASE_COMBINING)) {
|
||
|
|
case 0:
|
||
|
|
/*
|
||
|
|
* With none of the "complicated" options set, the destination
|
||
|
|
* run will have the same length as the source run,
|
||
|
|
* and there is no mirroring and no keeping combining characters
|
||
|
|
* with their base characters.
|
||
|
|
*/
|
||
|
|
if(destSize<srcLength) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
return srcLength;
|
||
|
|
}
|
||
|
|
destSize=srcLength;
|
||
|
|
|
||
|
|
/* preserve character integrity */
|
||
|
|
do {
|
||
|
|
/* i is always after the last code unit known to need to be kept in this segment */
|
||
|
|
i=srcLength;
|
||
|
|
|
||
|
|
/* collect code units for one base character */
|
||
|
|
U16_BACK_1(src, 0, srcLength);
|
||
|
|
|
||
|
|
/* copy this base character */
|
||
|
|
j=srcLength;
|
||
|
|
do {
|
||
|
|
*dest++=src[j++];
|
||
|
|
} while(j<i);
|
||
|
|
} while(srcLength>0);
|
||
|
|
break;
|
||
|
|
case UBIDI_KEEP_BASE_COMBINING:
|
||
|
|
/*
|
||
|
|
* Here, too, the destination
|
||
|
|
* run will have the same length as the source run,
|
||
|
|
* and there is no mirroring.
|
||
|
|
* We do need to keep combining characters with their base characters.
|
||
|
|
*/
|
||
|
|
if(destSize<srcLength) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
return srcLength;
|
||
|
|
}
|
||
|
|
destSize=srcLength;
|
||
|
|
|
||
|
|
/* preserve character integrity */
|
||
|
|
do {
|
||
|
|
/* i is always after the last code unit known to need to be kept in this segment */
|
||
|
|
i=srcLength;
|
||
|
|
|
||
|
|
/* collect code units and modifier letters for one base character */
|
||
|
|
do {
|
||
|
|
U16_PREV(src, 0, srcLength, c);
|
||
|
|
} while(srcLength>0 && IS_COMBINING(u_charType(c)));
|
||
|
|
|
||
|
|
/* copy this "user character" */
|
||
|
|
j=srcLength;
|
||
|
|
do {
|
||
|
|
*dest++=src[j++];
|
||
|
|
} while(j<i);
|
||
|
|
} while(srcLength>0);
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
/*
|
||
|
|
* With several "complicated" options set, this is the most
|
||
|
|
* general and the slowest copying of an RTL run.
|
||
|
|
* We will do mirroring, remove BiDi controls, and
|
||
|
|
* keep combining characters with their base characters
|
||
|
|
* as requested.
|
||
|
|
*/
|
||
|
|
if(!(options&UBIDI_REMOVE_BIDI_CONTROLS)) {
|
||
|
|
i=srcLength;
|
||
|
|
} else {
|
||
|
|
/* we need to find out the destination length of the run,
|
||
|
|
which will not include the BiDi control characters */
|
||
|
|
int32_t length=srcLength;
|
||
|
|
UChar ch;
|
||
|
|
|
||
|
|
i=0;
|
||
|
|
do {
|
||
|
|
ch=*src++;
|
||
|
|
if(!IS_BIDI_CONTROL_CHAR(ch)) {
|
||
|
|
++i;
|
||
|
|
}
|
||
|
|
} while(--length>0);
|
||
|
|
src-=srcLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(destSize<i) {
|
||
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
destSize=i;
|
||
|
|
|
||
|
|
/* preserve character integrity */
|
||
|
|
do {
|
||
|
|
/* i is always after the last code unit known to need to be kept in this segment */
|
||
|
|
i=srcLength;
|
||
|
|
|
||
|
|
/* collect code units for one base character */
|
||
|
|
U16_PREV(src, 0, srcLength, c);
|
||
|
|
if(options&UBIDI_KEEP_BASE_COMBINING) {
|
||
|
|
/* collect modifier letters for this base character */
|
||
|
|
while(srcLength>0 && IS_COMBINING(u_charType(c))) {
|
||
|
|
U16_PREV(src, 0, srcLength, c);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if(options&UBIDI_REMOVE_BIDI_CONTROLS && IS_BIDI_CONTROL_CHAR(c)) {
|
||
|
|
/* do not copy this BiDi control character */
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* copy this "user character" */
|
||
|
|
j=srcLength;
|
||
|
|
if(options&UBIDI_DO_MIRRORING) {
|
||
|
|
/* mirror only the base character */
|
||
|
|
int32_t k=0;
|
||
|
|
c=u_charMirror(c);
|
||
|
|
U16_APPEND_UNSAFE(dest, k, c);
|
||
|
|
dest+=k;
|
||
|
|
j+=k;
|
||
|
|
}
|
||
|
|
while(j<i) {
|
||
|
|
*dest++=src[j++];
|
||
|
|
}
|
||
|
|
} while(srcLength>0);
|
||
|
|
break;
|
||
|
|
} /* end of switch */
|
||
|
|
|
||
|
|
return destSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
U_CAPI int32_t U_EXPORT2
|
||
|
|
ubidi_writeReverse(const UChar *src, int32_t srcLength,
|
||
|
|
UChar *dest, int32_t destSize,
|
||
|
|
uint16_t options,
|
||
|
|
UErrorCode *pErrorCode) {
|
||
|
|
int32_t destLength;
|
||
|
|
|
||
|
|
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* more error checking */
|
||
|
|
if( src==NULL || srcLength<-1 ||
|
||
|
|
destSize<0 || (destSize>0 && dest==NULL))
|
||
|
|
{
|
||
|
|
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* do input and output overlap? */
|
||
|
|
if( dest!=NULL &&
|
||
|
|
((src>=dest && src<dest+destSize) ||
|
||
|
|
(dest>=src && dest<src+srcLength)))
|
||
|
|
{
|
||
|
|
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(srcLength==-1) {
|
||
|
|
srcLength=u_strlen(src);
|
||
|
|
}
|
||
|
|
if(srcLength>0) {
|
||
|
|
destLength=doWriteReverse(src, srcLength, dest, destSize, options, pErrorCode);
|
||
|
|
} else {
|
||
|
|
/* nothing to do */
|
||
|
|
destLength=0;
|
||
|
|
}
|
||
|
|
|
||
|
|
return u_terminateUChars(dest, destSize, destLength, pErrorCode);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Ticket 20907 - The optimizer in MSVC/Visual Studio versions below 16.4 has trouble with this
|
||
|
|
// function on Windows ARM64. As a work-around, we disable optimizations for this function.
|
||
|
|
// This work-around could/should be removed once the following versions of Visual Studio are no
|
||
|
|
// longer supported: All versions of VS2017, and versions of VS2019 below 16.4.
|
||
|
|
#if (defined(_MSC_VER) && (defined(_M_ARM64)) && (_MSC_VER < 1924))
|
||
|
|
#pragma optimize( "", off )
|
||
|
|
#endif
|
||
|
|
U_CAPI int32_t U_EXPORT2
|
||
|
|
ubidi_writeReordered(UBiDi *pBiDi,
|
||
|
|
UChar *dest, int32_t destSize,
|
||
|
|
uint16_t options,
|
||
|
|
UErrorCode *pErrorCode) {
|
||
|
|
const UChar *text;
|
||
|
|
UChar *saveDest;
|
||
|
|
int32_t length, destCapacity;
|
||
|
|
int32_t run, runCount, logicalStart, runLength;
|
||
|
|
|
||
|
|
if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* more error checking */
|
||
|
|
if( pBiDi==NULL ||
|
||
|
|
(text=pBiDi->text)==NULL || (length=pBiDi->length)<0 ||
|
||
|
|
destSize<0 || (destSize>0 && dest==NULL))
|
||
|
|
{
|
||
|
|
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* do input and output overlap? */
|
||
|
|
if( dest!=NULL &&
|
||
|
|
((text>=dest && text<dest+destSize) ||
|
||
|
|
(dest>=text && dest<text+pBiDi->originalLength)))
|
||
|
|
{
|
||
|
|
*pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(length==0) {
|
||
|
|
/* nothing to do */
|
||
|
|
return u_terminateUChars(dest, destSize, 0, pErrorCode);
|
||
|
|
}
|
||
|
|
|
||
|
|
runCount=ubidi_countRuns(pBiDi, pErrorCode);
|
||
|
|
if(U_FAILURE(*pErrorCode)) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* destSize shrinks, later destination length=destCapacity-destSize */
|
||
|
|
saveDest=dest;
|
||
|
|
destCapacity=destSize;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Option "insert marks" implies UBIDI_INSERT_LRM_FOR_NUMERIC if the
|
||
|
|
* reordering mode (checked below) is appropriate.
|
||
|
|
*/
|
||
|
|
if(pBiDi->reorderingOptions & UBIDI_OPTION_INSERT_MARKS) {
|
||
|
|
options|=UBIDI_INSERT_LRM_FOR_NUMERIC;
|
||
|
|
options&=~UBIDI_REMOVE_BIDI_CONTROLS;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
* Option "remove controls" implies UBIDI_REMOVE_BIDI_CONTROLS
|
||
|
|
* and cancels UBIDI_INSERT_LRM_FOR_NUMERIC.
|
||
|
|
*/
|
||
|
|
if(pBiDi->reorderingOptions & UBIDI_OPTION_REMOVE_CONTROLS) {
|
||
|
|
options|=UBIDI_REMOVE_BIDI_CONTROLS;
|
||
|
|
options&=~UBIDI_INSERT_LRM_FOR_NUMERIC;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
* If we do not perform the "inverse BiDi" algorithm, then we
|
||
|
|
* don't need to insert any LRMs, and don't need to test for it.
|
||
|
|
*/
|
||
|
|
if((pBiDi->reorderingMode != UBIDI_REORDER_INVERSE_NUMBERS_AS_L) &&
|
||
|
|
(pBiDi->reorderingMode != UBIDI_REORDER_INVERSE_LIKE_DIRECT) &&
|
||
|
|
(pBiDi->reorderingMode != UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL) &&
|
||
|
|
(pBiDi->reorderingMode != UBIDI_REORDER_RUNS_ONLY)) {
|
||
|
|
options&=~UBIDI_INSERT_LRM_FOR_NUMERIC;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
* Iterate through all visual runs and copy the run text segments to
|
||
|
|
* the destination, according to the options.
|
||
|
|
*
|
||
|
|
* The tests for where to insert LRMs ignore the fact that there may be
|
||
|
|
* BN codes or non-BMP code points at the beginning and end of a run;
|
||
|
|
* they may insert LRMs unnecessarily but the tests are faster this way
|
||
|
|
* (this would have to be improved for UTF-8).
|
||
|
|
*
|
||
|
|
* Note that the only errors that are set by doWriteXY() are buffer overflow
|
||
|
|
* errors. Ignore them until the end, and continue for preflighting.
|
||
|
|
*/
|
||
|
|
if(!(options&UBIDI_OUTPUT_REVERSE)) {
|
||
|
|
/* forward output */
|
||
|
|
if(!(options&UBIDI_INSERT_LRM_FOR_NUMERIC)) {
|
||
|
|
/* do not insert BiDi controls */
|
||
|
|
for(run=0; run<runCount; ++run) {
|
||
|
|
if(UBIDI_LTR==ubidi_getVisualRun(pBiDi, run, &logicalStart, &runLength)) {
|
||
|
|
runLength=doWriteForward(text+logicalStart, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
(uint16_t)(options&~UBIDI_DO_MIRRORING), pErrorCode);
|
||
|
|
} else {
|
||
|
|
runLength=doWriteReverse(text+logicalStart, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
options, pErrorCode);
|
||
|
|
}
|
||
|
|
if(dest!=NULL) {
|
||
|
|
dest+=runLength;
|
||
|
|
}
|
||
|
|
destSize-=runLength;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* insert BiDi controls for "inverse BiDi" */
|
||
|
|
const DirProp *dirProps=pBiDi->dirProps;
|
||
|
|
const UChar *src;
|
||
|
|
UChar uc;
|
||
|
|
UBiDiDirection dir;
|
||
|
|
int32_t markFlag;
|
||
|
|
|
||
|
|
for(run=0; run<runCount; ++run) {
|
||
|
|
dir=ubidi_getVisualRun(pBiDi, run, &logicalStart, &runLength);
|
||
|
|
src=text+logicalStart;
|
||
|
|
/* check if something relevant in insertPoints */
|
||
|
|
markFlag=pBiDi->runs[run].insertRemove;
|
||
|
|
if(markFlag<0) { /* BiDi controls count */
|
||
|
|
markFlag=0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if(UBIDI_LTR==dir) {
|
||
|
|
if((pBiDi->isInverse) &&
|
||
|
|
(/*run>0 &&*/ dirProps[logicalStart]!=L)) {
|
||
|
|
markFlag |= LRM_BEFORE;
|
||
|
|
}
|
||
|
|
if (markFlag & LRM_BEFORE) {
|
||
|
|
uc=LRM_CHAR;
|
||
|
|
}
|
||
|
|
else if (markFlag & RLM_BEFORE) {
|
||
|
|
uc=RLM_CHAR;
|
||
|
|
}
|
||
|
|
else uc=0;
|
||
|
|
if(uc) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=uc;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
runLength=doWriteForward(src, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
(uint16_t)(options&~UBIDI_DO_MIRRORING), pErrorCode);
|
||
|
|
if(dest!=NULL) {
|
||
|
|
dest+=runLength;
|
||
|
|
}
|
||
|
|
destSize-=runLength;
|
||
|
|
|
||
|
|
if((pBiDi->isInverse) &&
|
||
|
|
(/*run<runCount-1 &&*/ dirProps[logicalStart+runLength-1]!=L)) {
|
||
|
|
markFlag |= LRM_AFTER;
|
||
|
|
}
|
||
|
|
if (markFlag & LRM_AFTER) {
|
||
|
|
uc=LRM_CHAR;
|
||
|
|
}
|
||
|
|
else if (markFlag & RLM_AFTER) {
|
||
|
|
uc=RLM_CHAR;
|
||
|
|
}
|
||
|
|
else uc=0;
|
||
|
|
if(uc) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=uc;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
} else { /* RTL run */
|
||
|
|
if((pBiDi->isInverse) &&
|
||
|
|
(/*run>0 &&*/ !(MASK_R_AL&DIRPROP_FLAG(dirProps[logicalStart+runLength-1])))) {
|
||
|
|
markFlag |= RLM_BEFORE;
|
||
|
|
}
|
||
|
|
if (markFlag & LRM_BEFORE) {
|
||
|
|
uc=LRM_CHAR;
|
||
|
|
}
|
||
|
|
else if (markFlag & RLM_BEFORE) {
|
||
|
|
uc=RLM_CHAR;
|
||
|
|
}
|
||
|
|
else uc=0;
|
||
|
|
if(uc) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=uc;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
runLength=doWriteReverse(src, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
options, pErrorCode);
|
||
|
|
if(dest!=NULL) {
|
||
|
|
dest+=runLength;
|
||
|
|
}
|
||
|
|
destSize-=runLength;
|
||
|
|
|
||
|
|
if((pBiDi->isInverse) &&
|
||
|
|
(/*run<runCount-1 &&*/ !(MASK_R_AL&DIRPROP_FLAG(dirProps[logicalStart])))) {
|
||
|
|
markFlag |= RLM_AFTER;
|
||
|
|
}
|
||
|
|
if (markFlag & LRM_AFTER) {
|
||
|
|
uc=LRM_CHAR;
|
||
|
|
}
|
||
|
|
else if (markFlag & RLM_AFTER) {
|
||
|
|
uc=RLM_CHAR;
|
||
|
|
}
|
||
|
|
else uc=0;
|
||
|
|
if(uc) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=uc;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* reverse output */
|
||
|
|
if(!(options&UBIDI_INSERT_LRM_FOR_NUMERIC)) {
|
||
|
|
/* do not insert BiDi controls */
|
||
|
|
for(run=runCount; --run>=0;) {
|
||
|
|
if(UBIDI_LTR==ubidi_getVisualRun(pBiDi, run, &logicalStart, &runLength)) {
|
||
|
|
runLength=doWriteReverse(text+logicalStart, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
(uint16_t)(options&~UBIDI_DO_MIRRORING), pErrorCode);
|
||
|
|
} else {
|
||
|
|
runLength=doWriteForward(text+logicalStart, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
options, pErrorCode);
|
||
|
|
}
|
||
|
|
if(dest!=NULL) {
|
||
|
|
dest+=runLength;
|
||
|
|
}
|
||
|
|
destSize-=runLength;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
/* insert BiDi controls for "inverse BiDi" */
|
||
|
|
const DirProp *dirProps=pBiDi->dirProps;
|
||
|
|
const UChar *src;
|
||
|
|
UBiDiDirection dir;
|
||
|
|
|
||
|
|
for(run=runCount; --run>=0;) {
|
||
|
|
/* reverse output */
|
||
|
|
dir=ubidi_getVisualRun(pBiDi, run, &logicalStart, &runLength);
|
||
|
|
src=text+logicalStart;
|
||
|
|
|
||
|
|
if(UBIDI_LTR==dir) {
|
||
|
|
if(/*run<runCount-1 &&*/ dirProps[logicalStart+runLength-1]!=L) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=LRM_CHAR;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
runLength=doWriteReverse(src, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
(uint16_t)(options&~UBIDI_DO_MIRRORING), pErrorCode);
|
||
|
|
if(dest!=NULL) {
|
||
|
|
dest+=runLength;
|
||
|
|
}
|
||
|
|
destSize-=runLength;
|
||
|
|
|
||
|
|
if(/*run>0 &&*/ dirProps[logicalStart]!=L) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=LRM_CHAR;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if(/*run<runCount-1 &&*/ !(MASK_R_AL&DIRPROP_FLAG(dirProps[logicalStart]))) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=RLM_CHAR;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
|
||
|
|
runLength=doWriteForward(src, runLength,
|
||
|
|
dest, destSize,
|
||
|
|
options, pErrorCode);
|
||
|
|
if(dest!=NULL) {
|
||
|
|
dest+=runLength;
|
||
|
|
}
|
||
|
|
destSize-=runLength;
|
||
|
|
|
||
|
|
if(/*run>0 &&*/ !(MASK_R_AL&DIRPROP_FLAG(dirProps[logicalStart+runLength-1]))) {
|
||
|
|
if(destSize>0) {
|
||
|
|
*dest++=RLM_CHAR;
|
||
|
|
}
|
||
|
|
--destSize;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return u_terminateUChars(saveDest, destCapacity, destCapacity-destSize, pErrorCode);
|
||
|
|
}
|
||
|
|
#if (defined(_MSC_VER) && (defined(_M_ARM64)) && (_MSC_VER < 1924))
|
||
|
|
#pragma optimize( "", on )
|
||
|
|
#endif
|