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Diffstat (limited to 'WebCore/platform/text/mac/ShapeArabic.c')
| -rw-r--r-- | WebCore/platform/text/mac/ShapeArabic.c | 555 |
1 files changed, 555 insertions, 0 deletions
diff --git a/WebCore/platform/text/mac/ShapeArabic.c b/WebCore/platform/text/mac/ShapeArabic.c new file mode 100644 index 0000000..6dbc008 --- /dev/null +++ b/WebCore/platform/text/mac/ShapeArabic.c @@ -0,0 +1,555 @@ +/* +****************************************************************************** +* +* Copyright (C) 2000-2004, International Business Machines +* Corporation and others. All Rights Reserved. +* Copyright (C) 2007 Apple Inc. All rights reserved. +* +* Permission is hereby granted, free of charge, to any person obtaining a copy of this +* software and associated documentation files (the "Software"), to deal in the Software +* without restriction, including without limitation the rights to use, copy, modify, +* merge, publish, distribute, and/or sell copies of the Software, and to permit persons +* to whom the Software is furnished to do so, provided that the above copyright notice(s) +* and this permission notice appear in all copies of the Software and that both the above +* copyright notice(s) and this permission notice appear in supporting documentation. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, +* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR +* PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER +* OR HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR +* CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR +* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING +* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. +* +* Except as contained in this notice, the name of a copyright holder shall not be used in +* advertising or otherwise to promote the sale, use or other dealings in this Software +* without prior written authorization of the copyright holder. +* +****************************************************************************** +* +* Arabic letter shaping implemented by Ayman Roshdy +*/ + +#include "config.h" + +#if USE(ATSUI) + +#include "ShapeArabic.h" + +#include <unicode/utypes.h> +#include <unicode/uchar.h> +#include <unicode/ustring.h> +#include <unicode/ushape.h> +#include <wtf/Assertions.h> + +/* + * ### TODO in general for letter shaping: + * - the letter shaping code is UTF-16-unaware; needs update + * + especially invertBuffer()?! + * - needs to handle the "Arabic Tail" that is used in some legacy codepages + * as a glyph fragment of wide-glyph letters + * + IBM Unicode conversion tables map it to U+200B (ZWSP) + * + IBM Egypt has proposed to encode the tail in Unicode among Arabic Presentation Forms + */ + +/* definitions for Arabic letter shaping ------------------------------------ */ + +#define IRRELEVANT 4 +#define LAMTYPE 16 +#define ALEFTYPE 32 +#define LINKR 1 +#define LINKL 2 + +static const UChar IrrelevantPos[] = { + 0x0, 0x2, 0x4, 0x6, + 0x8, 0xA, 0xC, 0xE, +}; + +static const UChar araLink[178]= +{ + 1 + 32 + 256 * 0x11,/*0x0622*/ + 1 + 32 + 256 * 0x13,/*0x0623*/ + 1 + 256 * 0x15,/*0x0624*/ + 1 + 32 + 256 * 0x17,/*0x0625*/ + 1 + 2 + 256 * 0x19,/*0x0626*/ + 1 + 32 + 256 * 0x1D,/*0x0627*/ + 1 + 2 + 256 * 0x1F,/*0x0628*/ + 1 + 256 * 0x23,/*0x0629*/ + 1 + 2 + 256 * 0x25,/*0x062A*/ + 1 + 2 + 256 * 0x29,/*0x062B*/ + 1 + 2 + 256 * 0x2D,/*0x062C*/ + 1 + 2 + 256 * 0x31,/*0x062D*/ + 1 + 2 + 256 * 0x35,/*0x062E*/ + 1 + 256 * 0x39,/*0x062F*/ + 1 + 256 * 0x3B,/*0x0630*/ + 1 + 256 * 0x3D,/*0x0631*/ + 1 + 256 * 0x3F,/*0x0632*/ + 1 + 2 + 256 * 0x41,/*0x0633*/ + 1 + 2 + 256 * 0x45,/*0x0634*/ + 1 + 2 + 256 * 0x49,/*0x0635*/ + 1 + 2 + 256 * 0x4D,/*0x0636*/ + 1 + 2 + 256 * 0x51,/*0x0637*/ + 1 + 2 + 256 * 0x55,/*0x0638*/ + 1 + 2 + 256 * 0x59,/*0x0639*/ + 1 + 2 + 256 * 0x5D,/*0x063A*/ + 0, 0, 0, 0, 0, /*0x063B-0x063F*/ + 1 + 2, /*0x0640*/ + 1 + 2 + 256 * 0x61,/*0x0641*/ + 1 + 2 + 256 * 0x65,/*0x0642*/ + 1 + 2 + 256 * 0x69,/*0x0643*/ + 1 + 2 + 16 + 256 * 0x6D,/*0x0644*/ + 1 + 2 + 256 * 0x71,/*0x0645*/ + 1 + 2 + 256 * 0x75,/*0x0646*/ + 1 + 2 + 256 * 0x79,/*0x0647*/ + 1 + 256 * 0x7D,/*0x0648*/ + 1 + 256 * 0x7F,/*0x0649*/ + 1 + 2 + 256 * 0x81,/*0x064A*/ + 4, 4, 4, 4, /*0x064B-0x064E*/ + 4, 4, 4, 4, /*0x064F-0x0652*/ + 4, 4, 4, 0, 0, /*0x0653-0x0657*/ + 0, 0, 0, 0, /*0x0658-0x065B*/ + 1 + 256 * 0x85,/*0x065C*/ + 1 + 256 * 0x87,/*0x065D*/ + 1 + 256 * 0x89,/*0x065E*/ + 1 + 256 * 0x8B,/*0x065F*/ + 0, 0, 0, 0, 0, /*0x0660-0x0664*/ + 0, 0, 0, 0, 0, /*0x0665-0x0669*/ + 0, 0, 0, 0, 0, 0, /*0x066A-0x066F*/ + 4, /*0x0670*/ + 0, /*0x0671*/ + 1 + 32, /*0x0672*/ + 1 + 32, /*0x0673*/ + 0, /*0x0674*/ + 1 + 32, /*0x0675*/ + 1, 1, /*0x0676-0x0677*/ + 1+2, /*0x0678*/ + 1+2 + 256 * 0x16,/*0x0679*/ + 1+2 + 256 * 0x0E,/*0x067A*/ + 1+2 + 256 * 0x02,/*0x067B*/ + 1+2, 1+2, /*0x067C-0x067D*/ + 1+2 + 256 * 0x06,/*0x067E*/ + 1+2 + 256 * 0x12,/*0x067F*/ + 1+2 + 256 * 0x0A,/*0x0680*/ + 1+2, 1+2, /*0x0681-0x0682*/ + 1+2 + 256 * 0x26,/*0x0683*/ + 1+2 + 256 * 0x22,/*0x0684*/ + 1+2, /*0x0685*/ + 1+2 + 256 * 0x2A,/*0x0686*/ + 1+2 + 256 * 0x2E,/*0x0687*/ + 1 + 256 * 0x38,/*0x0688*/ + 1, 1, 1, /*0x0689-0x068B*/ + 1 + 256 * 0x34,/*0x068C*/ + 1 + 256 * 0x32,/*0x068D*/ + 1 + 256 * 0x36,/*0x068E*/ + 1, 1, /*0x068F-0x0690*/ + 1 + 256 * 0x3C,/*0x0691*/ + 1, 1, 1, 1, 1, 1, /*0x0692-0x0697*/ + 1 + 256 * 0x3A,/*0x0698*/ + 1, /*0x0699*/ + 1+2, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x069A-0x069F*/ + 1+2, 1+2, 1+2, 1+2, /*0x06A0-0x06A3*/ + 1+2 + 256 * 0x2E,/*0x06A4*/ + 1+2, /*0x06A5*/ + 1+2 + 256 * 0x1E,/*0x06A6*/ + 1+2, 1+2, /*0x06A7-0x06A8*/ + 1+2 + 256 * 0x3E,/*0x06A9*/ + 1+2, 1+2, 1+2, /*0x06AA-0x06AC*/ + 1+2 + 256 * 0x83,/*0x06AD*/ + 1+2, /*0x06AE*/ + 1+2 + 256 * 0x42,/*0x06AF*/ + 1+2, /*0x06B0*/ + 1+2 + 256 * 0x4A,/*0x06B1*/ + 1+2, /*0x06B2*/ + 1+2 + 256 * 0x46,/*0x06B3*/ + 1+2, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x06B4-0x06B9*/ + 1+2, /*0x06BA*/ // FIXME: Seems to have a final form + 1+2 + 256 * 0x50,/*0x06BB*/ + 1+2, 1+2, /*0x06BC-0x06BD*/ + 1+2 + 256 * 0x5A,/*0x06BE*/ + 1+2, /*0x06BF*/ + 1, /*0x06C0*/ + 1+2 + 256 * 0x56,/*0x06C1*/ + 1+2, /*0x06C2*/ + 1, 1, /*0x06C3-0x06C4*/ + 1 + 256 * 0x90,/*0x06C5*/ + 1 + 256 * 0x89,/*0x06C6*/ + 1 + 256 * 0x87,/*0x06C7*/ + 1 + 256 * 0x8B,/*0x06C8*/ + 1 + 256 * 0x92,/*0x06C9*/ + 1, /*0x06CA*/ + 1 + 256 * 0x8E,/*0x06CB*/ + 1+2 + 256 * 0xAC,/*0x06CC*/ + 1, /*0x06CD*/ + 1+2, /*0x06CE*/ + 1, /*0x06CF*/ + 1+2 + 256 * 0x94,/*0x06D0*/ + 1+2, /*0x06D1*/ + 1 + 256 * 0x5E,/*0x06D2*/ + 1 + 256 * 0x60 /*0x06D3*/ +}; + +static const UChar presLink[141]= +{ + 1 + 2, /*0xFE70*/ + 1 + 2, /*0xFE71*/ + 1 + 2, 0, 1+ 2, 0, 1+ 2, /*0xFE72-0xFE76*/ + 1 + 2, /*0xFE77*/ + 1+ 2, 1 + 2, 1+2, 1 + 2, /*0xFE78-0xFE81*/ + 1+ 2, 1 + 2, 1+2, 1 + 2, /*0xFE82-0xFE85*/ + 0, 0 + 32, 1 + 32, 0 + 32, /*0xFE86-0xFE89*/ + 1 + 32, 0, 1, 0 + 32, /*0xFE8A-0xFE8D*/ + 1 + 32, 0, 2, 1 + 2, /*0xFE8E-0xFE91*/ + 1, 0 + 32, 1 + 32, 0, /*0xFE92-0xFE95*/ + 2, 1 + 2, 1, 0, /*0xFE96-0xFE99*/ + 1, 0, 2, 1 + 2, /*0xFE9A-0xFE9D*/ + 1, 0, 2, 1 + 2, /*0xFE9E-0xFEA1*/ + 1, 0, 2, 1 + 2, /*0xFEA2-0xFEA5*/ + 1, 0, 2, 1 + 2, /*0xFEA6-0xFEA9*/ + 1, 0, 2, 1 + 2, /*0xFEAA-0xFEAD*/ + 1, 0, 1, 0, /*0xFEAE-0xFEB1*/ + 1, 0, 1, 0, /*0xFEB2-0xFEB5*/ + 1, 0, 2, 1+2, /*0xFEB6-0xFEB9*/ + 1, 0, 2, 1+2, /*0xFEBA-0xFEBD*/ + 1, 0, 2, 1+2, /*0xFEBE-0xFEC1*/ + 1, 0, 2, 1+2, /*0xFEC2-0xFEC5*/ + 1, 0, 2, 1+2, /*0xFEC6-0xFEC9*/ + 1, 0, 2, 1+2, /*0xFECA-0xFECD*/ + 1, 0, 2, 1+2, /*0xFECE-0xFED1*/ + 1, 0, 2, 1+2, /*0xFED2-0xFED5*/ + 1, 0, 2, 1+2, /*0xFED6-0xFED9*/ + 1, 0, 2, 1+2, /*0xFEDA-0xFEDD*/ + 1, 0, 2, 1+2, /*0xFEDE-0xFEE1*/ + 1, 0 + 16, 2 + 16, 1 + 2 +16, /*0xFEE2-0xFEE5*/ + 1 + 16, 0, 2, 1+2, /*0xFEE6-0xFEE9*/ + 1, 0, 2, 1+2, /*0xFEEA-0xFEED*/ + 1, 0, 2, 1+2, /*0xFEEE-0xFEF1*/ + 1, 0, 1, 0, /*0xFEF2-0xFEF5*/ + 1, 0, 2, 1+2, /*0xFEF6-0xFEF9*/ + 1, 0, 1, 0, /*0xFEFA-0xFEFD*/ + 1, 0, 1, 0, + 1 +}; + +static const UChar convertFEto06[] = +{ +/***********0******1******2******3******4******5******6******7******8******9******A******B******C******D******E******F***/ +/*FE7*/ 0x64B, 0x64B, 0x64C, 0x64C, 0x64D, 0x64D, 0x64E, 0x64E, 0x64F, 0x64F, 0x650, 0x650, 0x651, 0x651, 0x652, 0x652, +/*FE8*/ 0x621, 0x622, 0x622, 0x623, 0x623, 0x624, 0x624, 0x625, 0x625, 0x626, 0x626, 0x626, 0x626, 0x627, 0x627, 0x628, +/*FE9*/ 0x628, 0x628, 0x628, 0x629, 0x629, 0x62A, 0x62A, 0x62A, 0x62A, 0x62B, 0x62B, 0x62B, 0x62B, 0x62C, 0x62C, 0x62C, +/*FEA*/ 0x62C, 0x62D, 0x62D, 0x62D, 0x62D, 0x62E, 0x62E, 0x62E, 0x62E, 0x62F, 0x62F, 0x630, 0x630, 0x631, 0x631, 0x632, +/*FEB*/ 0x632, 0x633, 0x633, 0x633, 0x633, 0x634, 0x634, 0x634, 0x634, 0x635, 0x635, 0x635, 0x635, 0x636, 0x636, 0x636, +/*FEC*/ 0x636, 0x637, 0x637, 0x637, 0x637, 0x638, 0x638, 0x638, 0x638, 0x639, 0x639, 0x639, 0x639, 0x63A, 0x63A, 0x63A, +/*FED*/ 0x63A, 0x641, 0x641, 0x641, 0x641, 0x642, 0x642, 0x642, 0x642, 0x643, 0x643, 0x643, 0x643, 0x644, 0x644, 0x644, +/*FEE*/ 0x644, 0x645, 0x645, 0x645, 0x645, 0x646, 0x646, 0x646, 0x646, 0x647, 0x647, 0x647, 0x647, 0x648, 0x648, 0x649, +/*FEF*/ 0x649, 0x64A, 0x64A, 0x64A, 0x64A, 0x65C, 0x65C, 0x65D, 0x65D, 0x65E, 0x65E, 0x65F, 0x65F +}; + +static const UChar shapeTable[4][4][4]= +{ + { {0,0,0,0}, {0,0,0,0}, {0,1,0,3}, {0,1,0,1} }, + { {0,0,2,2}, {0,0,1,2}, {0,1,1,2}, {0,1,1,3} }, + { {0,0,0,0}, {0,0,0,0}, {0,1,0,3}, {0,1,0,3} }, + { {0,0,1,2}, {0,0,1,2}, {0,1,1,2}, {0,1,1,3} } +}; + +/* + *Name : changeLamAlef + *Function : Converts the Alef characters into an equivalent + * LamAlef location in the 0x06xx Range, this is an + * intermediate stage in the operation of the program + * later it'll be converted into the 0xFExx LamAlefs + * in the shaping function. + */ +static UChar +changeLamAlef(UChar ch) { + + switch(ch) { + case 0x0622 : + return(0x065C); + break; + case 0x0623 : + return(0x065D); + break; + case 0x0625 : + return(0x065E); + break; + case 0x0627 : + return(0x065F); + break; + default : + return(0); + break; + } +} + +/* + *Name : specialChar + *Function : Special Arabic characters need special handling in the shapeUnicode + * function, this function returns 1 or 2 for these special characters + */ +static int32_t +specialChar(UChar ch) { + + if( (ch>0x0621 && ch<0x0626)||(ch==0x0627)||(ch>0x062e && ch<0x0633)|| + (ch>0x0647 && ch<0x064a)||(ch==0x0629) ) { + return (1); + } + else + if( ch>=0x064B && ch<= 0x0652 ) + return (2); + else + if( (ch>=0x0653 && ch<= 0x0655) || ch == 0x0670 || + (ch>=0xFE70 && ch<= 0xFE7F) ) + return (3); + else + return (0); +} + +/* + *Name : getLink + *Function : Resolves the link between the characters as + * Arabic characters have four forms : + * Isolated, Initial, Middle and Final Form + */ +static UChar +getLink(UChar ch) { + + if(ch >= 0x0622 && ch <= 0x06D3) { + return(araLink[ch-0x0622]); + } else if(ch == 0x200D) { + return(3); + } else if(ch >= 0x206D && ch <= 0x206F) { + return(4); + } else if(ch >= 0xFE70 && ch <= 0xFEFC) { + return(presLink[ch-0xFE70]); + } else { + return(0); + } +} + +/* + *Name : isTashkeelChar + *Function : Returns 1 for Tashkeel characters else return 0 + */ +static int32_t +isTashkeelChar(UChar ch) { + + if( ch>=0x064B && ch<= 0x0652 ) + return (1); + else + return (0); +} + +/* + *Name : shapeUnicode + *Function : Converts an Arabic Unicode buffer in 06xx Range into a shaped + * arabic Unicode buffer in FExx Range + */ +static int32_t +shapeUnicode(UChar *dest, int32_t sourceLength, + int32_t destSize,uint32_t options, + UErrorCode *pErrorCode, + int tashkeelFlag) { + + int32_t i, iend; + int32_t prevPos, lastPos,Nx, Nw; + unsigned int Shape; + int32_t flag; + int32_t lamalef_found = 0; + UChar prevLink = 0, lastLink = 0, currLink, nextLink = 0; + UChar wLamalef; + + /* + * Converts the input buffer from FExx Range into 06xx Range + * to make sure that all characters are in the 06xx range + * even the lamalef is converted to the special region in + * the 06xx range + */ + for (i = 0; i < sourceLength; i++) { + UChar inputChar = dest[i]; + if ( (inputChar >= 0xFE70) && (inputChar <= 0xFEFC)) { + dest[i] = convertFEto06 [ (inputChar - 0xFE70) ] ; + } + } + + /* sets the index to the end of the buffer, together with the step point to -1 */ + i = 0; + iend = sourceLength; + + /* + * This function resolves the link between the characters . + * Arabic characters have four forms : + * Isolated Form, Initial Form, Middle Form and Final Form + */ + currLink = getLink(dest[i]); + + prevPos = i; + lastPos = i; + Nx = sourceLength + 2, Nw = 0; + + while (i != iend) { + /* If high byte of currLink > 0 then more than one shape */ + if ((currLink & 0xFF00) > 0 || isTashkeelChar(dest[i])) { + Nw = i + 1; + while (Nx >= sourceLength) { /* we need to know about next char */ + if(Nw == iend) { + nextLink = 0; + Nx = -1; + } else { + nextLink = getLink(dest[Nw]); + if((nextLink & IRRELEVANT) == 0) { + Nx = Nw; + } else { + Nw = Nw + 1; + } + } + } + + if ( ((currLink & ALEFTYPE) > 0) && ((lastLink & LAMTYPE) > 0) ) { + lamalef_found = 1; + wLamalef = changeLamAlef(dest[i]); /*get from 0x065C-0x065f */ + if ( wLamalef != 0) { + dest[i] = ' '; /* The default case is to drop the Alef and replace */ + dest[lastPos] =wLamalef; /* it by a space. */ + i=lastPos; + } + lastLink = prevLink; + currLink = getLink(wLamalef); + } + /* + * get the proper shape according to link ability of neighbors + * and of character; depends on the order of the shapes + * (isolated, initial, middle, final) in the compatibility area + */ + flag = specialChar(dest[i]); + + Shape = shapeTable[nextLink & (LINKR + LINKL)] + [lastLink & (LINKR + LINKL)] + [currLink & (LINKR + LINKL)]; + + if (flag == 1) { + Shape = (Shape == 1 || Shape == 3) ? 1 : 0; + } + else + if(flag == 2) { + if( (lastLink & LINKL) && (nextLink & LINKR) && (tashkeelFlag == 1) && + dest[i] != 0x064C && dest[i] != 0x064D ) { + Shape = 1; + if( (nextLink&ALEFTYPE) == ALEFTYPE && (lastLink&LAMTYPE) == LAMTYPE ) + Shape = 0; + } + else { + Shape = 0; + } + } + + if(flag == 2) { + dest[i] = 0xFE70 + IrrelevantPos[(dest[i] - 0x064B)] + Shape; + } + else + dest[i] = (UChar)((dest[i] < 0x0670 ? 0xFE70 : 0xFB50) + (currLink >> 8) + Shape); + } + + /* move one notch forward */ + if ((currLink & IRRELEVANT) == 0) { + prevLink = lastLink; + lastLink = currLink; + prevPos = lastPos; + lastPos = i; + } + + i++; + if (i == Nx) { + currLink = nextLink; + Nx = sourceLength + 2; + } + else if(i != iend) { + currLink = getLink(dest[i]); + } + } + + destSize = sourceLength; + + return destSize; +} + +int32_t shapeArabic(const UChar *source, int32_t sourceLength, UChar *dest, int32_t destCapacity, uint32_t options, UErrorCode *pErrorCode) { + int32_t destLength; + + /* usual error checking */ + if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { + return 0; + } + + /* make sure that no reserved options values are used; allow dest==NULL only for preflighting */ + if( source==NULL || sourceLength<-1 || + (dest==NULL && destCapacity!=0) || destCapacity<0 || + options>=U_SHAPE_DIGIT_TYPE_RESERVED || + (options&U_SHAPE_DIGITS_MASK)>=U_SHAPE_DIGITS_RESERVED + ) { + *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; + return 0; + } + + /* determine the source length */ + if(sourceLength==-1) { + sourceLength=u_strlen(source); + } + if(sourceLength==0) { + return 0; + } + + /* check that source and destination do not overlap */ + if( dest!=NULL && + ((source<=dest && dest<source+sourceLength) || + (dest<=source && source<dest+destCapacity)) + ) { + *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; + return 0; + } + + if((options&U_SHAPE_LETTERS_MASK)!=U_SHAPE_LETTERS_NOOP) { + int32_t outputSize = sourceLength; + + /* calculate destination size */ + /* TODO: do we ever need to do this pure preflighting? */ + ASSERT((options&U_SHAPE_LENGTH_MASK) != U_SHAPE_LENGTH_GROW_SHRINK); + + if(outputSize>destCapacity) { + *pErrorCode=U_BUFFER_OVERFLOW_ERROR; + return outputSize; + } + + /* Start of Arabic letter shaping part */ + memcpy(dest, source, sourceLength*U_SIZEOF_UCHAR); + + ASSERT((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL); + + switch(options&U_SHAPE_LETTERS_MASK) { + case U_SHAPE_LETTERS_SHAPE : + /* Call the shaping function with tashkeel flag == 1 */ + destLength = shapeUnicode(dest,sourceLength,destCapacity,options,pErrorCode,1); + break; + case U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED : + /* Call the shaping function with tashkeel flag == 0 */ + destLength = shapeUnicode(dest,sourceLength,destCapacity,options,pErrorCode,0); + break; + case U_SHAPE_LETTERS_UNSHAPE : + ASSERT_NOT_REACHED(); + break; + default : + /* will never occur because of validity checks above */ + destLength = 0; + break; + } + + /* End of Arabic letter shaping part */ + } else + ASSERT_NOT_REACHED(); + + ASSERT((options & U_SHAPE_DIGITS_MASK) == U_SHAPE_DIGITS_NOOP); + + return sourceLength; +} + +#endif // USE(ATSUI) |