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+// © 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+ ******************************************************************************
+ *
+ * Copyright (C) 2000-2016, International Business Machines
+ * Corporation and others. All Rights Reserved.
+ *
+ ******************************************************************************
+ * file name: ushape.cpp
+ * encoding: UTF-8
+ * tab size: 8 (not used)
+ * indentation:4
+ *
+ * created on: 2000jun29
+ * created by: Markus W. Scherer
+ *
+ * Arabic letter shaping implemented by Ayman Roshdy
+ */
+
+#include <unicode/utypes.h>
+#include <unicode/uchar.h>
+#include <unicode/ustring.h>
+#include <unicode/ushape.h>
+#include "cmemory.h"
+#include "putilimp.h"
+#include "ustr_imp.h"
+#include "ubidi_props.h"
+#include "uassert.h"
+
+/*
+ * This implementation is designed for 16-bit Unicode strings.
+ * The main assumption is that the Arabic characters and their
+ * presentation forms each fit into a single UChar.
+ * With UTF-8, they occupy 2 or 3 bytes, and more than the ASCII
+ * characters.
+ */
+
+/*
+ * ### 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
+ * + Unicode 3.2 added U+FE73 ARABIC TAIL FRAGMENT
+ */
+
+/* definitions for Arabic letter shaping ------------------------------------ */
+
+#define IRRELEVANT 4
+#define LAMTYPE 16
+#define ALEFTYPE 32
+#define LINKR 1
+#define LINKL 2
+#define APRESENT 8
+#define SHADDA 64
+#define CSHADDA 128
+#define COMBINE (SHADDA+CSHADDA)
+
+#define HAMZAFE_CHAR 0xfe80
+#define HAMZA06_CHAR 0x0621
+#define YEH_HAMZA_CHAR 0x0626
+#define YEH_HAMZAFE_CHAR 0xFE89
+#define LAMALEF_SPACE_SUB 0xFFFF
+#define TASHKEEL_SPACE_SUB 0xFFFE
+#define NEW_TAIL_CHAR 0xFE73
+#define OLD_TAIL_CHAR 0x200B
+#define LAM_CHAR 0x0644
+#define SPACE_CHAR 0x0020
+#define SHADDA_CHAR 0xFE7C
+#define TATWEEL_CHAR 0x0640
+#define SHADDA_TATWEEL_CHAR 0xFE7D
+#define SHADDA06_CHAR 0x0651
+
+#define SHAPE_MODE 0
+#define DESHAPE_MODE 1
+
+struct uShapeVariables {
+ UChar tailChar;
+ uint32_t uShapeLamalefBegin;
+ uint32_t uShapeLamalefEnd;
+ uint32_t uShapeTashkeelBegin;
+ uint32_t uShapeTashkeelEnd;
+ int spacesRelativeToTextBeginEnd;
+};
+
+static const uint8_t tailFamilyIsolatedFinal[] = {
+ /* FEB1 */ 1,
+ /* FEB2 */ 1,
+ /* FEB3 */ 0,
+ /* FEB4 */ 0,
+ /* FEB5 */ 1,
+ /* FEB6 */ 1,
+ /* FEB7 */ 0,
+ /* FEB8 */ 0,
+ /* FEB9 */ 1,
+ /* FEBA */ 1,
+ /* FEBB */ 0,
+ /* FEBC */ 0,
+ /* FEBD */ 1,
+ /* FEBE */ 1
+};
+
+static const uint8_t tashkeelMedial[] = {
+ /* FE70 */ 0,
+ /* FE71 */ 1,
+ /* FE72 */ 0,
+ /* FE73 */ 0,
+ /* FE74 */ 0,
+ /* FE75 */ 0,
+ /* FE76 */ 0,
+ /* FE77 */ 1,
+ /* FE78 */ 0,
+ /* FE79 */ 1,
+ /* FE7A */ 0,
+ /* FE7B */ 1,
+ /* FE7C */ 0,
+ /* FE7D */ 1,
+ /* FE7E */ 0,
+ /* FE7F */ 1
+};
+
+static const UChar yehHamzaToYeh[] =
+{
+/* isolated*/ 0xFEEF,
+/* final */ 0xFEF0
+};
+
+static const uint8_t IrrelevantPos[] = {
+ 0x0, 0x2, 0x4, 0x6,
+ 0x8, 0xA, 0xC, 0xE
+};
+
+
+static const UChar convertLamAlef[] =
+{
+/*FEF5*/ 0x0622,
+/*FEF6*/ 0x0622,
+/*FEF7*/ 0x0623,
+/*FEF8*/ 0x0623,
+/*FEF9*/ 0x0625,
+/*FEFA*/ 0x0625,
+/*FEFB*/ 0x0627,
+/*FEFC*/ 0x0627
+};
+
+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 + 256 * 1, /*0x064B*/
+ 4 + 128 + 256 * 1, /*0x064C*/
+ 4 + 128 + 256 * 1, /*0x064D*/
+ 4 + 128 + 256 * 1, /*0x064E*/
+ 4 + 128 + 256 * 1, /*0x064F*/
+ 4 + 128 + 256 * 1, /*0x0650*/
+ 4 + 64 + 256 * 3, /*0x0651*/
+ 4 + 256 * 1, /*0x0652*/
+ 4 + 256 * 7, /*0x0653*/
+ 4 + 256 * 8, /*0x0654*/
+ 4 + 256 * 8, /*0x0655*/
+ 4 + 256 * 1, /*0x0656*/
+ 0, 0, 0, 0, 0, /*0x0657-0x065B*/
+ 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 + 256 * 6, /*0x0670*/
+ 1 + 8 + 256 * 0x00,/*0x0671*/
+ 1 + 32, /*0x0672*/
+ 1 + 32, /*0x0673*/
+ 0, /*0x0674*/
+ 1 + 32, /*0x0675*/
+ 1, 1, /*0x0676-0x0677*/
+ 1 + 2, /*0x0678*/
+ 1 + 2 + 8 + 256 * 0x16,/*0x0679*/
+ 1 + 2 + 8 + 256 * 0x0E,/*0x067A*/
+ 1 + 2 + 8 + 256 * 0x02,/*0x067B*/
+ 1+2, 1+2, /*0x67C-0x067D*/
+ 1+2+8+256 * 0x06, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x067E-0x0683*/
+ 1+2, 1+2, 1+2+8+256 * 0x2A, 1+2, /*0x0684-0x0687*/
+ 1 + 8 + 256 * 0x38,/*0x0688*/
+ 1, 1, 1, /*0x0689-0x068B*/
+ 1 + 8 + 256 * 0x34,/*0x068C*/
+ 1 + 8 + 256 * 0x32,/*0x068D*/
+ 1 + 8 + 256 * 0x36,/*0x068E*/
+ 1, 1, /*0x068F-0x0690*/
+ 1 + 8 + 256 * 0x3C,/*0x0691*/
+ 1, 1, 1, 1, 1, 1, 1+8+256 * 0x3A, 1, /*0x0692-0x0699*/
+ 1+2, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x069A-0x06A3*/
+ 1+2, 1+2, 1+2, 1+2, /*0x069A-0x06A3*/
+ 1+2, 1+2, 1+2, 1+2, 1+2, 1+2+8+256 * 0x3E, /*0x06A4-0x06AD*/
+ 1+2, 1+2, 1+2, 1+2, /*0x06A4-0x06AD*/
+ 1+2, 1+2+8+256 * 0x42, 1+2, 1+2, 1+2, 1+2, /*0x06AE-0x06B7*/
+ 1+2, 1+2, 1+2, 1+2, /*0x06AE-0x06B7*/
+ 1+2, 1+2, /*0x06B8-0x06B9*/
+ 1 + 8 + 256 * 0x4E,/*0x06BA*/
+ 1 + 2 + 8 + 256 * 0x50,/*0x06BB*/
+ 1+2, 1+2, /*0x06BC-0x06BD*/
+ 1 + 2 + 8 + 256 * 0x5A,/*0x06BE*/
+ 1+2, /*0x06BF*/
+ 1 + 8 + 256 * 0x54,/*0x06C0*/
+ 1 + 2 + 8 + 256 * 0x56,/*0x06C1*/
+ 1, 1, 1, /*0x06C2-0x06C4*/
+ 1 + 8 + 256 * 0x90,/*0x06C5*/
+ 1 + 8 + 256 * 0x89,/*0x06C6*/
+ 1 + 8 + 256 * 0x87,/*0x06C7*/
+ 1 + 8 + 256 * 0x8B,/*0x06C8*/
+ 1 + 8 + 256 * 0x92,/*0x06C9*/
+ 1, /*0x06CA*/
+ 1 + 8 + 256 * 0x8E,/*0x06CB*/
+ 1 + 2 + 8 + 256 * 0xAC,/*0x06CC*/
+ 1, /*0x06CD*/
+ 1+2, 1+2, /*0x06CE-0x06CF*/
+ 1 + 2 + 8 + 256 * 0x94,/*0x06D0*/
+ 1+2, /*0x06D1*/
+ 1 + 8 + 256 * 0x5E,/*0x06D2*/
+ 1 + 8 + 256 * 0x60 /*0x06D3*/
+};
+
+static const uint8_t presALink[] = {
+/***********0*****1*****2*****3*****4*****5*****6*****7*****8*****9*****A*****B*****C*****D*****E*****F*/
+/*FB5*/ 0, 1, 0, 0, 0, 0, 0, 1, 2,1 + 2, 0, 0, 0, 0, 0, 0,
+/*FB6*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FB7*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2,1 + 2, 0, 0,
+/*FB8*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1,
+/*FB9*/ 2,1 + 2, 0, 1, 2,1 + 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBA*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBB*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBC*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBD*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBE*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBF*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2,1 + 2,
+/*FC0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FC1*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FC2*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FC3*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FC4*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FC5*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4,
+/*FC6*/ 4, 4, 4
+};
+
+static const uint8_t presBLink[]=
+{
+/***********0*****1*****2*****3*****4*****5*****6*****7*****8*****9*****A*****B*****C*****D*****E*****F*/
+/*FE7*/1 + 2,1 + 2,1 + 2, 0,1 + 2, 0,1 + 2,1 + 2,1 + 2,1 + 2,1 + 2,1 + 2,1 + 2,1 + 2,1 + 2,1 + 2,
+/*FE8*/ 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2,1 + 2, 0, 1, 0,
+/*FE9*/ 1, 2,1 + 2, 0, 1, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
+/*FEA*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 0, 1, 0, 1, 0,
+/*FEB*/ 1, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
+/*FEC*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
+/*FED*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
+/*FEE*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 0,
+/*FEF*/ 1, 0, 1, 2,1 + 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0
+};
+
+static const UChar convertFBto06[] =
+{
+/***********0******1******2******3******4******5******6******7******8******9******A******B******C******D******E******F***/
+/*FB5*/ 0x671, 0x671, 0x67B, 0x67B, 0x67B, 0x67B, 0x67E, 0x67E, 0x67E, 0x67E, 0, 0, 0, 0, 0x67A, 0x67A,
+/*FB6*/ 0x67A, 0x67A, 0, 0, 0, 0, 0x679, 0x679, 0x679, 0x679, 0, 0, 0, 0, 0, 0,
+/*FB7*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x686, 0x686, 0x686, 0x686, 0, 0,
+/*FB8*/ 0, 0, 0x68D, 0x68D, 0x68C, 0x68C, 0x68E, 0x68E, 0x688, 0x688, 0x698, 0x698, 0x691, 0x691, 0x6A9, 0x6A9,
+/*FB9*/ 0x6A9, 0x6A9, 0x6AF, 0x6AF, 0x6AF, 0x6AF, 0, 0, 0, 0, 0, 0, 0, 0, 0x6BA, 0x6BA,
+/*FBA*/ 0x6BB, 0x6BB, 0x6BB, 0x6BB, 0x6C0, 0x6C0, 0x6C1, 0x6C1, 0x6C1, 0x6C1, 0x6BE, 0x6BE, 0x6BE, 0x6BE, 0x6d2, 0x6D2,
+/*FBB*/ 0x6D3, 0x6D3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBC*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBD*/ 0, 0, 0, 0, 0, 0, 0, 0x6C7, 0x6C7, 0x6C6, 0x6C6, 0x6C8, 0x6C8, 0, 0x6CB, 0x6CB,
+/*FBE*/ 0x6C5, 0x6C5, 0x6C9, 0x6C9, 0x6D0, 0x6D0, 0x6D0, 0x6D0, 0, 0, 0, 0, 0, 0, 0, 0,
+/*FBF*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x6CC, 0x6CC, 0x6CC, 0x6CC
+};
+
+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 uint8_t 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} }
+};
+
+/*
+ * This function shapes European digits to Arabic-Indic digits
+ * in-place, writing over the input characters.
+ * Since we know that we are only looking for BMP code points,
+ * we can safely just work with code units (again, at least UTF-16).
+ */
+static void
+_shapeToArabicDigitsWithContext(UChar *s, int32_t length,
+ UChar digitBase,
+ UBool isLogical, UBool lastStrongWasAL) {
+ int32_t i;
+ UChar c;
+
+ digitBase-=0x30;
+
+ /* the iteration direction depends on the type of input */
+ if(isLogical) {
+ for(i=0; i<length; ++i) {
+ c=s[i];
+ switch(ubidi_getClass(c)) {
+ case U_LEFT_TO_RIGHT: /* L */
+ case U_RIGHT_TO_LEFT: /* R */
+ lastStrongWasAL=FALSE;
+ break;
+ case U_RIGHT_TO_LEFT_ARABIC: /* AL */
+ lastStrongWasAL=TRUE;
+ break;
+ case U_EUROPEAN_NUMBER: /* EN */
+ if(lastStrongWasAL && (uint32_t)(c-0x30)<10) {
+ s[i]=(UChar)(digitBase+c); /* digitBase+(c-0x30) - digitBase was modified above */
+ }
+ break;
+ default :
+ break;
+ }
+ }
+ } else {
+ for(i=length; i>0; /* pre-decrement in the body */) {
+ c=s[--i];
+ switch(ubidi_getClass(c)) {
+ case U_LEFT_TO_RIGHT: /* L */
+ case U_RIGHT_TO_LEFT: /* R */
+ lastStrongWasAL=FALSE;
+ break;
+ case U_RIGHT_TO_LEFT_ARABIC: /* AL */
+ lastStrongWasAL=TRUE;
+ break;
+ case U_EUROPEAN_NUMBER: /* EN */
+ if(lastStrongWasAL && (uint32_t)(c-0x30)<10) {
+ s[i]=(UChar)(digitBase+c); /* digitBase+(c-0x30) - digitBase was modified above */
+ }
+ break;
+ default :
+ break;
+ }
+ }
+ }
+}
+
+/*
+ *Name : invertBuffer
+ *Function : This function inverts the buffer, it's used
+ * in case the user specifies the buffer to be
+ * U_SHAPE_TEXT_DIRECTION_LOGICAL
+ */
+static void
+invertBuffer(UChar *buffer, int32_t size, uint32_t /*options*/, int32_t lowlimit, int32_t highlimit) {
+ UChar temp;
+ int32_t i=0,j=0;
+ for(i=lowlimit,j=size-highlimit-1;i<j;i++,j--) {
+ temp = buffer[i];
+ buffer[i] = buffer[j];
+ buffer[j] = temp;
+ }
+}
+
+/*
+ *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 inline UChar
+changeLamAlef(UChar ch) {
+ switch(ch) {
+ case 0x0622 :
+ return 0x065C;
+ case 0x0623 :
+ return 0x065D;
+ case 0x0625 :
+ return 0x065E;
+ case 0x0627 :
+ return 0x065F;
+ }
+ 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 >= 0xFB50 && ch <= 0xFC62) {
+ return(presALink[ch-0xFB50]);
+ } else if(ch >= 0xFE70 && ch <= 0xFEFC) {
+ return(presBLink[ch-0xFE70]);
+ }else {
+ return(0);
+ }
+}
+
+/*
+ *Name : countSpaces
+ *Function : Counts the number of spaces
+ * at each end of the logical buffer
+ */
+static void
+countSpaces(UChar *dest, int32_t size, uint32_t /*options*/, int32_t *spacesCountl, int32_t *spacesCountr) {
+ int32_t i = 0;
+ int32_t countl = 0,countr = 0;
+ while((dest[i] == SPACE_CHAR) && (countl < size)) {
+ countl++;
+ i++;
+ }
+ if (countl < size) { /* the entire buffer is not all space */
+ while(dest[size-1] == SPACE_CHAR) {
+ countr++;
+ size--;
+ }
+ }
+ *spacesCountl = countl;
+ *spacesCountr = countr;
+}
+
+/*
+ *Name : isTashkeelChar
+ *Function : Returns 1 for Tashkeel characters in 06 range else return 0
+ */
+static inline int32_t
+isTashkeelChar(UChar ch) {
+ return (int32_t)( ch>=0x064B && ch<= 0x0652 );
+}
+
+/*
+ *Name : isTashkeelCharFE
+ *Function : Returns 1 for Tashkeel characters in FE range else return 0
+ */
+static inline int32_t
+isTashkeelCharFE(UChar ch) {
+ return (int32_t)( ch>=0xFE70 && ch<= 0xFE7F );
+}
+
+/*
+ *Name : isAlefChar
+ *Function : Returns 1 for Alef characters else return 0
+ */
+static inline int32_t
+isAlefChar(UChar ch) {
+ return (int32_t)( (ch==0x0622)||(ch==0x0623)||(ch==0x0625)||(ch==0x0627) );
+}
+
+/*
+ *Name : isLamAlefChar
+ *Function : Returns 1 for LamAlef characters else return 0
+ */
+static inline int32_t
+isLamAlefChar(UChar ch) {
+ return (int32_t)((ch>=0xFEF5)&&(ch<=0xFEFC) );
+}
+
+/*BIDI
+ *Name : isTailChar
+ *Function : returns 1 if the character matches one of the tail characters (0xfe73 or 0x200b) otherwise returns 0
+ */
+
+static inline int32_t
+isTailChar(UChar ch) {
+ if(ch == OLD_TAIL_CHAR || ch == NEW_TAIL_CHAR){
+ return 1;
+ }else{
+ return 0;
+ }
+}
+
+/*BIDI
+ *Name : isSeenTailFamilyChar
+ *Function : returns 1 if the character is a seen family isolated character
+ * in the FE range otherwise returns 0
+ */
+
+static inline int32_t
+isSeenTailFamilyChar(UChar ch) {
+ if(ch >= 0xfeb1 && ch < 0xfebf){
+ return tailFamilyIsolatedFinal [ch - 0xFEB1];
+ }else{
+ return 0;
+ }
+}
+
+ /* Name : isSeenFamilyChar
+ * Function : returns 1 if the character is a seen family character in the Unicode
+ * 06 range otherwise returns 0
+ */
+
+static inline int32_t
+isSeenFamilyChar(UChar ch){
+ if(ch >= 0x633 && ch <= 0x636){
+ return 1;
+ }else {
+ return 0;
+ }
+}
+
+/*Start of BIDI*/
+/*
+ *Name : isAlefMaksouraChar
+ *Function : returns 1 if the character is a Alef Maksoura Final or isolated
+ * otherwise returns 0
+ */
+static inline int32_t
+isAlefMaksouraChar(UChar ch) {
+ return (int32_t)( (ch == 0xFEEF) || ( ch == 0xFEF0) || (ch == 0x0649));
+}
+
+/*
+ * Name : isYehHamzaChar
+ * Function : returns 1 if the character is a yehHamza isolated or yehhamza
+ * final is found otherwise returns 0
+ */
+static inline int32_t
+isYehHamzaChar(UChar ch) {
+ if((ch==0xFE89)||(ch==0xFE8A)){
+ return 1;
+ }else{
+ return 0;
+ }
+}
+
+ /*
+ * Name: isTashkeelOnTatweelChar
+ * Function: Checks if the Tashkeel Character is on Tatweel or not,if the
+ * Tashkeel on tatweel (FE range), it returns 1 else if the
+ * Tashkeel with shadda on tatweel (FC range)return 2 otherwise
+ * returns 0
+ */
+static inline int32_t
+isTashkeelOnTatweelChar(UChar ch){
+ if(ch >= 0xfe70 && ch <= 0xfe7f && ch != NEW_TAIL_CHAR && ch != 0xFE75 && ch != SHADDA_TATWEEL_CHAR)
+ {
+ return tashkeelMedial [ch - 0xFE70];
+ }else if( (ch >= 0xfcf2 && ch <= 0xfcf4) || (ch == SHADDA_TATWEEL_CHAR)) {
+ return 2;
+ }else{
+ return 0;
+ }
+}
+
+/*
+ * Name: isIsolatedTashkeelChar
+ * Function: Checks if the Tashkeel Character is in the isolated form
+ * (i.e. Unicode FE range) returns 1 else if the Tashkeel
+ * with shadda is in the isolated form (i.e. Unicode FC range)
+ * returns 2 otherwise returns 0
+ */
+static inline int32_t
+isIsolatedTashkeelChar(UChar ch){
+ if(ch >= 0xfe70 && ch <= 0xfe7f && ch != NEW_TAIL_CHAR && ch != 0xFE75){
+ return (1 - tashkeelMedial [ch - 0xFE70]);
+ }else if(ch >= 0xfc5e && ch <= 0xfc63){
+ return 1;
+ }else{
+ return 0;
+ }
+}
+
+
+
+
+/*
+ *Name : calculateSize
+ *Function : This function calculates the destSize to be used in preflighting
+ * when the destSize is equal to 0
+ * It is used also to calculate the new destsize in case the
+ * destination buffer will be resized.
+ */
+
+static int32_t
+calculateSize(const UChar *source, int32_t sourceLength,
+int32_t destSize,uint32_t options) {
+ int32_t i = 0;
+
+ int lamAlefOption = 0;
+ int tashkeelOption = 0;
+
+ destSize = sourceLength;
+
+ if (((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_SHAPE ||
+ ((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED )) &&
+ ((options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE )){
+ lamAlefOption = 1;
+ }
+ if((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_SHAPE &&
+ ((options&U_SHAPE_TASHKEEL_MASK) == U_SHAPE_TASHKEEL_RESIZE ) ){
+ tashkeelOption = 1;
+ }
+
+ if(lamAlefOption || tashkeelOption){
+ if((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_VISUAL_LTR) {
+ for(i=0;i<sourceLength;i++) {
+ if( ((isAlefChar(source[i]))&& (i<(sourceLength-1)) &&(source[i+1] == LAM_CHAR)) || (isTashkeelCharFE(source[i])) ) {
+ destSize--;
+ }
+ }
+ }else if((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_LOGICAL) {
+ for(i=0;i<sourceLength;i++) {
+ if( ( (source[i] == LAM_CHAR) && (i<(sourceLength-1)) && (isAlefChar(source[i+1]))) || (isTashkeelCharFE(source[i])) ) {
+ destSize--;
+ }
+ }
+ }
+ }
+
+ if ((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_UNSHAPE){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE){
+ for(i=0;i<sourceLength;i++) {
+ if(isLamAlefChar(source[i]))
+ destSize++;
+ }
+ }
+ }
+
+ return destSize;
+}
+
+/*
+ *Name : handleTashkeelWithTatweel
+ *Function : Replaces Tashkeel as following:
+ * Case 1 :if the Tashkeel on tatweel, replace it with Tatweel.
+ * Case 2 :if the Tashkeel aggregated with Shadda on Tatweel, replace
+ * it with Shadda on Tatweel.
+ * Case 3: if the Tashkeel is isolated replace it with Space.
+ *
+ */
+static int32_t
+handleTashkeelWithTatweel(UChar *dest, int32_t sourceLength,
+ int32_t /*destSize*/, uint32_t /*options*/,
+ UErrorCode * /*pErrorCode*/) {
+ int i;
+ for(i = 0; i < sourceLength; i++){
+ if((isTashkeelOnTatweelChar(dest[i]) == 1)){
+ dest[i] = TATWEEL_CHAR;
+ }else if((isTashkeelOnTatweelChar(dest[i]) == 2)){
+ dest[i] = SHADDA_TATWEEL_CHAR;
+ }else if(isIsolatedTashkeelChar(dest[i]) && dest[i] != SHADDA_CHAR){
+ dest[i] = SPACE_CHAR;
+ }
+ }
+ return sourceLength;
+}
+
+
+
+/*
+ *Name : handleGeneratedSpaces
+ *Function : The shapeUnicode function converts Lam + Alef into LamAlef + space,
+ * and Tashkeel to space.
+ * handleGeneratedSpaces function puts these generated spaces
+ * according to the options the user specifies. LamAlef and Tashkeel
+ * spaces can be replaced at begin, at end, at near or decrease the
+ * buffer size.
+ *
+ * There is also Auto option for LamAlef and tashkeel, which will put
+ * the spaces at end of the buffer (or end of text if the user used
+ * the option U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END).
+ *
+ * If the text type was visual_LTR and the option
+ * U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END was selected the END
+ * option will place the space at the beginning of the buffer and
+ * BEGIN will place the space at the end of the buffer.
+ */
+
+static int32_t
+handleGeneratedSpaces(UChar *dest, int32_t sourceLength,
+ int32_t destSize,
+ uint32_t options,
+ UErrorCode *pErrorCode,struct uShapeVariables shapeVars ) {
+
+ int32_t i = 0, j = 0;
+ int32_t count = 0;
+ UChar *tempbuffer=NULL;
+
+ int lamAlefOption = 0;
+ int tashkeelOption = 0;
+ int shapingMode = SHAPE_MODE;
+
+ if (shapingMode == 0){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE ){
+ lamAlefOption = 1;
+ }
+ if ( (options&U_SHAPE_TASHKEEL_MASK) == U_SHAPE_TASHKEEL_RESIZE ){
+ tashkeelOption = 1;
+ }
+ }
+
+ tempbuffer = (UChar *)uprv_malloc((sourceLength+1)*U_SIZEOF_UCHAR);
+ /* Test for NULL */
+ if(tempbuffer == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+
+ if (lamAlefOption || tashkeelOption){
+ uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
+
+ i = j = 0; count = 0;
+ while(i < sourceLength) {
+ if ( (lamAlefOption && dest[i] == LAMALEF_SPACE_SUB) ||
+ (tashkeelOption && dest[i] == TASHKEEL_SPACE_SUB) ){
+ j--;
+ count++;
+ } else {
+ tempbuffer[j] = dest[i];
+ }
+ i++;
+ j++;
+ }
+
+ while(count >= 0) {
+ tempbuffer[i] = 0x0000;
+ i--;
+ count--;
+ }
+
+ u_memcpy(dest, tempbuffer, sourceLength);
+ destSize = u_strlen(dest);
+ }
+
+ lamAlefOption = 0;
+
+ if (shapingMode == 0){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_NEAR ){
+ lamAlefOption = 1;
+ }
+ }
+
+ if (lamAlefOption){
+ /* Lam+Alef is already shaped into LamAlef + FFFF */
+ i = 0;
+ while(i < sourceLength) {
+ if(lamAlefOption&&dest[i] == LAMALEF_SPACE_SUB){
+ dest[i] = SPACE_CHAR;
+ }
+ i++;
+ }
+ destSize = sourceLength;
+ }
+ lamAlefOption = 0;
+ tashkeelOption = 0;
+
+ if (shapingMode == 0) {
+ if ( ((options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefBegin) ||
+ (((options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_AUTO )
+ && (shapeVars.spacesRelativeToTextBeginEnd==1)) ) {
+ lamAlefOption = 1;
+ }
+ if ( (options&U_SHAPE_TASHKEEL_MASK) == shapeVars.uShapeTashkeelBegin ) {
+ tashkeelOption = 1;
+ }
+ }
+
+ if(lamAlefOption || tashkeelOption){
+ uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
+
+ i = j = sourceLength; count = 0;
+
+ while(i >= 0) {
+ if ( (lamAlefOption && dest[i] == LAMALEF_SPACE_SUB) ||
+ (tashkeelOption && dest[i] == TASHKEEL_SPACE_SUB) ){
+ j++;
+ count++;
+ }else {
+ tempbuffer[j] = dest[i];
+ }
+ i--;
+ j--;
+ }
+
+ for(i=0 ;i < count; i++){
+ tempbuffer[i] = SPACE_CHAR;
+ }
+
+ u_memcpy(dest, tempbuffer, sourceLength);
+ destSize = sourceLength;
+ }
+
+
+
+ lamAlefOption = 0;
+ tashkeelOption = 0;
+
+ if (shapingMode == 0) {
+ if ( ((options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefEnd) ||
+ (((options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_AUTO )
+ && (shapeVars.spacesRelativeToTextBeginEnd==0)) ) {
+ lamAlefOption = 1;
+ }
+ if ( (options&U_SHAPE_TASHKEEL_MASK) == shapeVars.uShapeTashkeelEnd ){
+ tashkeelOption = 1;
+ }
+ }
+
+ if(lamAlefOption || tashkeelOption){
+ uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
+
+ i = j = 0; count = 0;
+ while(i < sourceLength) {
+ if ( (lamAlefOption && dest[i] == LAMALEF_SPACE_SUB) ||
+ (tashkeelOption && dest[i] == TASHKEEL_SPACE_SUB) ){
+ j--;
+ count++;
+ }else {
+ tempbuffer[j] = dest[i];
+ }
+ i++;
+ j++;
+ }
+
+ while(count >= 0) {
+ tempbuffer[i] = SPACE_CHAR;
+ i--;
+ count--;
+ }
+
+ u_memcpy(dest, tempbuffer, sourceLength);
+ destSize = sourceLength;
+ }
+
+
+ if(tempbuffer){
+ uprv_free(tempbuffer);
+ }
+
+ return destSize;
+}
+
+/*
+ *Name :expandCompositCharAtBegin
+ *Function :Expands the LamAlef character to Lam and Alef consuming the required
+ * space from beginning of the buffer. If the text type was visual_LTR
+ * and the option U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END was selected
+ * the spaces will be located at end of buffer.
+ * If there are no spaces to expand the LamAlef, an error
+ * will be set to U_NO_SPACE_AVAILABLE as defined in utypes.h
+ */
+
+static int32_t
+expandCompositCharAtBegin(UChar *dest, int32_t sourceLength, int32_t destSize,UErrorCode *pErrorCode) {
+ int32_t i = 0,j = 0;
+ int32_t countl = 0;
+ UChar *tempbuffer=NULL;
+
+ tempbuffer = (UChar *)uprv_malloc((sourceLength+1)*U_SIZEOF_UCHAR);
+
+ /* Test for NULL */
+ if(tempbuffer == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
+
+ i = 0;
+ while(dest[i] == SPACE_CHAR) {
+ countl++;
+ i++;
+ }
+
+ i = j = sourceLength-1;
+
+ while(i >= 0 && j >= 0) {
+ if( countl>0 && isLamAlefChar(dest[i])) {
+ tempbuffer[j] = LAM_CHAR;
+ /* to ensure the array index is within the range */
+ U_ASSERT(dest[i] >= 0xFEF5u
+ && dest[i]-0xFEF5u < UPRV_LENGTHOF(convertLamAlef));
+ tempbuffer[j-1] = convertLamAlef[ dest[i] - 0xFEF5 ];
+ j--;
+ countl--;
+ }else {
+ if( countl == 0 && isLamAlefChar(dest[i]) ) {
+ *pErrorCode=U_NO_SPACE_AVAILABLE;
+ }
+ tempbuffer[j] = dest[i];
+ }
+ i--;
+ j--;
+ }
+ u_memcpy(dest, tempbuffer, sourceLength);
+
+ uprv_free(tempbuffer);
+
+ destSize = sourceLength;
+ return destSize;
+}
+
+/*
+ *Name : expandCompositCharAtEnd
+ *Function : Expands the LamAlef character to Lam and Alef consuming the
+ * required space from end of the buffer. If the text type was
+ * Visual LTR and the option U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END
+ * was used, the spaces will be consumed from begin of buffer. If
+ * there are no spaces to expand the LamAlef, an error
+ * will be set to U_NO_SPACE_AVAILABLE as defined in utypes.h
+ */
+
+static int32_t
+expandCompositCharAtEnd(UChar *dest, int32_t sourceLength, int32_t destSize,UErrorCode *pErrorCode) {
+ int32_t i = 0,j = 0;
+
+ int32_t countr = 0;
+ int32_t inpsize = sourceLength;
+
+ UChar *tempbuffer=NULL;
+ tempbuffer = (UChar *)uprv_malloc((sourceLength+1)*U_SIZEOF_UCHAR);
+
+ /* Test for NULL */
+ if(tempbuffer == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
+
+ while(dest[inpsize-1] == SPACE_CHAR) {
+ countr++;
+ inpsize--;
+ }
+
+ i = sourceLength - countr - 1;
+ j = sourceLength - 1;
+
+ while(i >= 0 && j >= 0) {
+ if( countr>0 && isLamAlefChar(dest[i]) ) {
+ tempbuffer[j] = LAM_CHAR;
+ tempbuffer[j-1] = convertLamAlef[ dest[i] - 0xFEF5 ];
+ j--;
+ countr--;
+ }else {
+ if ((countr == 0) && isLamAlefChar(dest[i]) ) {
+ *pErrorCode=U_NO_SPACE_AVAILABLE;
+ }
+ tempbuffer[j] = dest[i];
+ }
+ i--;
+ j--;
+ }
+
+ if(countr > 0) {
+ u_memmove(tempbuffer, tempbuffer+countr, sourceLength);
+ if(u_strlen(tempbuffer) < sourceLength) {
+ for(i=sourceLength-1;i>=sourceLength-countr;i--) {
+ tempbuffer[i] = SPACE_CHAR;
+ }
+ }
+ }
+ u_memcpy(dest, tempbuffer, sourceLength);
+
+ uprv_free(tempbuffer);
+
+ destSize = sourceLength;
+ return destSize;
+}
+
+/*
+ *Name : expandCompositCharAtNear
+ *Function : Expands the LamAlef character into Lam + Alef, YehHamza character
+ * into Yeh + Hamza, SeenFamily character into SeenFamily character
+ * + Tail, while consuming the space next to the character.
+ * If there are no spaces next to the character, an error
+ * will be set to U_NO_SPACE_AVAILABLE as defined in utypes.h
+ */
+
+static int32_t
+expandCompositCharAtNear(UChar *dest, int32_t sourceLength, int32_t destSize,UErrorCode *pErrorCode,
+ int yehHamzaOption, int seenTailOption, int lamAlefOption, struct uShapeVariables shapeVars) {
+ int32_t i = 0;
+
+
+ UChar lamalefChar, yehhamzaChar;
+
+ for(i = 0 ;i<=sourceLength-1;i++) {
+ if (seenTailOption && isSeenTailFamilyChar(dest[i])) {
+ if ((i>0) && (dest[i-1] == SPACE_CHAR) ) {
+ dest[i-1] = shapeVars.tailChar;
+ }else {
+ *pErrorCode=U_NO_SPACE_AVAILABLE;
+ }
+ }else if(yehHamzaOption && (isYehHamzaChar(dest[i])) ) {
+ if ((i>0) && (dest[i-1] == SPACE_CHAR) ) {
+ yehhamzaChar = dest[i];
+ dest[i] = yehHamzaToYeh[yehhamzaChar - YEH_HAMZAFE_CHAR];
+ dest[i-1] = HAMZAFE_CHAR;
+ }else {
+
+ *pErrorCode=U_NO_SPACE_AVAILABLE;
+ }
+ }else if(lamAlefOption && isLamAlefChar(dest[i+1])) {
+ if(dest[i] == SPACE_CHAR){
+ lamalefChar = dest[i+1];
+ dest[i+1] = LAM_CHAR;
+ dest[i] = convertLamAlef[ lamalefChar - 0xFEF5 ];
+ }else {
+ *pErrorCode=U_NO_SPACE_AVAILABLE;
+ }
+ }
+ }
+ destSize = sourceLength;
+ return destSize;
+}
+ /*
+ * Name : expandCompositChar
+ * Function : LamAlef, need special handling, since it expands from one
+ * character into two characters while shaping or deshaping.
+ * In order to expand it, near or far spaces according to the
+ * options user specifies. Also buffer size can be increased.
+ *
+ * For SeenFamily characters and YehHamza only the near option is
+ * supported, while for LamAlef we can take spaces from begin, end,
+ * near or even increase the buffer size.
+ * There is also the Auto option for LamAlef only, which will first
+ * search for a space at end, begin then near, respectively.
+ * If there are no spaces to expand these characters, an error will be set to
+ * U_NO_SPACE_AVAILABLE as defined in utypes.h
+ */
+
+static int32_t
+expandCompositChar(UChar *dest, int32_t sourceLength,
+ int32_t destSize,uint32_t options,
+ UErrorCode *pErrorCode, int shapingMode,struct uShapeVariables shapeVars) {
+
+ int32_t i = 0,j = 0;
+
+ UChar *tempbuffer=NULL;
+ int yehHamzaOption = 0;
+ int seenTailOption = 0;
+ int lamAlefOption = 0;
+
+ if (shapingMode == 1){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_AUTO){
+
+ if(shapeVars.spacesRelativeToTextBeginEnd == 0) {
+ destSize = expandCompositCharAtEnd(dest, sourceLength, destSize, pErrorCode);
+
+ if(*pErrorCode == U_NO_SPACE_AVAILABLE) {
+ *pErrorCode = U_ZERO_ERROR;
+ destSize = expandCompositCharAtBegin(dest, sourceLength, destSize, pErrorCode);
+ }
+ }else {
+ destSize = expandCompositCharAtBegin(dest, sourceLength, destSize, pErrorCode);
+
+ if(*pErrorCode == U_NO_SPACE_AVAILABLE) {
+ *pErrorCode = U_ZERO_ERROR;
+ destSize = expandCompositCharAtEnd(dest, sourceLength, destSize, pErrorCode);
+ }
+ }
+
+ if(*pErrorCode == U_NO_SPACE_AVAILABLE) {
+ *pErrorCode = U_ZERO_ERROR;
+ destSize = expandCompositCharAtNear(dest, sourceLength, destSize, pErrorCode, yehHamzaOption,
+ seenTailOption, 1,shapeVars);
+ }
+ }
+ }
+
+ if (shapingMode == 1){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefEnd){
+ destSize = expandCompositCharAtEnd(dest, sourceLength, destSize, pErrorCode);
+ }
+ }
+
+ if (shapingMode == 1){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefBegin){
+ destSize = expandCompositCharAtBegin(dest, sourceLength, destSize, pErrorCode);
+ }
+ }
+
+ if (shapingMode == 0){
+ if ((options&U_SHAPE_YEHHAMZA_MASK) == U_SHAPE_YEHHAMZA_TWOCELL_NEAR){
+ yehHamzaOption = 1;
+ }
+ if ((options&U_SHAPE_SEEN_MASK) == U_SHAPE_SEEN_TWOCELL_NEAR){
+ seenTailOption = 1;
+ }
+ }
+ if (shapingMode == 1) {
+ if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_NEAR) {
+ lamAlefOption = 1;
+ }
+ }
+
+
+ if (yehHamzaOption || seenTailOption || lamAlefOption){
+ destSize = expandCompositCharAtNear(dest, sourceLength, destSize, pErrorCode, yehHamzaOption,
+ seenTailOption,lamAlefOption,shapeVars);
+ }
+
+
+ if (shapingMode == 1){
+ if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE){
+ destSize = calculateSize(dest,sourceLength,destSize,options);
+ tempbuffer = (UChar *)uprv_malloc((destSize+1)*U_SIZEOF_UCHAR);
+
+ /* Test for NULL */
+ if(tempbuffer == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ uprv_memset(tempbuffer, 0, (destSize+1)*U_SIZEOF_UCHAR);
+
+ i = j = 0;
+ while(i < destSize && j < destSize) {
+ if(isLamAlefChar(dest[i]) ) {
+ tempbuffer[j] = convertLamAlef[ dest[i] - 0xFEF5 ];
+ tempbuffer[j+1] = LAM_CHAR;
+ j++;
+ }else {
+ tempbuffer[j] = dest[i];
+ }
+ i++;
+ j++;
+ }
+
+ u_memcpy(dest, tempbuffer, destSize);
+ }
+ }
+
+ if(tempbuffer) {
+ uprv_free(tempbuffer);
+ }
+ return destSize;
+}
+
+/*
+ *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, struct uShapeVariables shapeVars) {
+
+ int32_t i, iend;
+ int32_t step;
+ int32_t lastPos,Nx, Nw;
+ unsigned int Shape;
+ int32_t lamalef_found = 0;
+ int32_t seenfamFound = 0, yehhamzaFound =0, tashkeelFound = 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
+ */
+ if ((options & U_SHAPE_PRESERVE_PRESENTATION_MASK) == U_SHAPE_PRESERVE_PRESENTATION_NOOP) {
+ for (i = 0; i < sourceLength; i++) {
+ UChar inputChar = dest[i];
+ if ( (inputChar >= 0xFB50) && (inputChar <= 0xFBFF)) {
+ UChar c = convertFBto06 [ (inputChar - 0xFB50) ];
+ if (c != 0)
+ dest[i] = c;
+ } else if ( (inputChar >= 0xFE70) && (inputChar <= 0xFEFC)) {
+ dest[i] = convertFEto06 [ (inputChar - 0xFE70) ] ;
+ } else {
+ dest[i] = inputChar ;
+ }
+ }
+ }
+
+
+ /* sets the index to the end of the buffer, together with the step point to -1 */
+ i = sourceLength - 1;
+ iend = -1;
+ step = -1;
+
+ /*
+ * 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]);
+
+ lastPos = i;
+ Nx = -2, Nw = 0;
+
+ while (i != iend) {
+ /* If high byte of currLink > 0 then more than one shape */
+ if ((currLink & 0xFF00) > 0 || (getLink(dest[i]) & IRRELEVANT) != 0) {
+ Nw = i + step;
+ while (Nx < 0) { /* we need to know about next char */
+ if(Nw == iend) {
+ nextLink = 0;
+ Nx = 3000;
+ } else {
+ nextLink = getLink(dest[Nw]);
+ if((nextLink & IRRELEVANT) == 0) {
+ Nx = Nw;
+ } else {
+ Nw = Nw + step;
+ }
+ }
+ }
+
+ if ( ((currLink & ALEFTYPE) > 0) && ((lastLink & LAMTYPE) > 0) ) {
+ lamalef_found = 1;
+ wLamalef = changeLamAlef(dest[i]); /*get from 0x065C-0x065f */
+ if ( wLamalef != 0) {
+ dest[i] = LAMALEF_SPACE_SUB; /* The default case is to drop the Alef and replace */
+ dest[lastPos] =wLamalef; /* it by LAMALEF_SPACE_SUB which is the last character in the */
+ i=lastPos; /* unicode private use area, this is done to make */
+ } /* sure that removeLamAlefSpaces() handles only the */
+ lastLink = prevLink; /* spaces generated during lamalef generation. */
+ currLink = getLink(wLamalef); /* LAMALEF_SPACE_SUB is added here and is replaced by spaces */
+ } /* in removeLamAlefSpaces() */
+
+ if ((i > 0) && (dest[i-1] == SPACE_CHAR)){
+ if ( isSeenFamilyChar(dest[i])) {
+ seenfamFound = 1;
+ } else if (dest[i] == YEH_HAMZA_CHAR) {
+ yehhamzaFound = 1;
+ }
+ }
+ else if(i==0){
+ if ( isSeenFamilyChar(dest[i])){
+ seenfamFound = 1;
+ } else if (dest[i] == YEH_HAMZA_CHAR) {
+ yehhamzaFound = 1;
+ }
+ }
+
+ /*
+ * 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
+ */
+ Shape = shapeTable[nextLink & (LINKR + LINKL)]
+ [lastLink & (LINKR + LINKL)]
+ [currLink & (LINKR + LINKL)];
+
+ if ((currLink & (LINKR+LINKL)) == 1) {
+ Shape &= 1;
+ } else if(isTashkeelChar(dest[i])) {
+ 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 if(tashkeelFlag == 2 && dest[i] == SHADDA06_CHAR){
+ Shape = 1;
+ } else {
+ Shape = 0;
+ }
+ }
+ if ((dest[i] ^ 0x0600) < 0x100) {
+ if ( isTashkeelChar(dest[i]) ){
+ if (tashkeelFlag == 2 && dest[i] != SHADDA06_CHAR){
+ dest[i] = TASHKEEL_SPACE_SUB;
+ tashkeelFound = 1;
+ } else {
+ /* to ensure the array index is within the range */
+ U_ASSERT(dest[i] >= 0x064Bu
+ && dest[i]-0x064Bu < UPRV_LENGTHOF(IrrelevantPos));
+ dest[i] = 0xFE70 + IrrelevantPos[(dest[i] - 0x064B)] + Shape;
+ }
+ }else if ((currLink & APRESENT) > 0) {
+ dest[i] = (UChar)(0xFB50 + (currLink >> 8) + Shape);
+ }else if ((currLink >> 8) > 0 && (currLink & IRRELEVANT) == 0) {
+ dest[i] = (UChar)(0xFE70 + (currLink >> 8) + Shape);
+ }
+ }
+ }
+
+ /* move one notch forward */
+ if ((currLink & IRRELEVANT) == 0) {
+ prevLink = lastLink;
+ lastLink = currLink;
+ lastPos = i;
+ }
+
+ i = i + step;
+ if (i == Nx) {
+ currLink = nextLink;
+ Nx = -2;
+ } else if(i != iend) {
+ currLink = getLink(dest[i]);
+ }
+ }
+ destSize = sourceLength;
+ if ( (lamalef_found != 0 ) || (tashkeelFound != 0) ){
+ destSize = handleGeneratedSpaces(dest,sourceLength,destSize,options,pErrorCode, shapeVars);
+ }
+
+ if ( (seenfamFound != 0) || (yehhamzaFound != 0) ) {
+ destSize = expandCompositChar(dest, sourceLength,destSize,options,pErrorCode, SHAPE_MODE,shapeVars);
+ }
+ return destSize;
+}
+
+/*
+ *Name : deShapeUnicode
+ *Function : Converts an Arabic Unicode buffer in FExx Range into unshaped
+ * arabic Unicode buffer in 06xx Range
+ */
+static int32_t
+deShapeUnicode(UChar *dest, int32_t sourceLength,
+ int32_t destSize,uint32_t options,
+ UErrorCode *pErrorCode, struct uShapeVariables shapeVars) {
+ int32_t i = 0;
+ int32_t lamalef_found = 0;
+ int32_t yehHamzaComposeEnabled = 0;
+ int32_t seenComposeEnabled = 0;
+
+ yehHamzaComposeEnabled = ((options&U_SHAPE_YEHHAMZA_MASK) == U_SHAPE_YEHHAMZA_TWOCELL_NEAR) ? 1 : 0;
+ seenComposeEnabled = ((options&U_SHAPE_SEEN_MASK) == U_SHAPE_SEEN_TWOCELL_NEAR)? 1 : 0;
+
+ /*
+ *This for loop changes the buffer from the Unicode FE range to
+ *the Unicode 06 range
+ */
+
+ for(i = 0; i < sourceLength; i++) {
+ UChar inputChar = dest[i];
+ if ( (inputChar >= 0xFB50) && (inputChar <= 0xFBFF)) { /* FBxx Arabic range */
+ UChar c = convertFBto06 [ (inputChar - 0xFB50) ];
+ if (c != 0)
+ dest[i] = c;
+ } else if( (yehHamzaComposeEnabled == 1) && ((inputChar == HAMZA06_CHAR) || (inputChar == HAMZAFE_CHAR))
+ && (i < (sourceLength - 1)) && isAlefMaksouraChar(dest[i+1] )) {
+ dest[i] = SPACE_CHAR;
+ dest[i+1] = YEH_HAMZA_CHAR;
+ } else if ( (seenComposeEnabled == 1) && (isTailChar(inputChar)) && (i< (sourceLength - 1))
+ && (isSeenTailFamilyChar(dest[i+1])) ) {
+ dest[i] = SPACE_CHAR;
+ } else if (( inputChar >= 0xFE70) && (inputChar <= 0xFEF4 )) { /* FExx Arabic range */
+ dest[i] = convertFEto06 [ (inputChar - 0xFE70) ];
+ } else {
+ dest[i] = inputChar ;
+ }
+
+ if( isLamAlefChar(dest[i]) )
+ lamalef_found = 1;
+ }
+
+ destSize = sourceLength;
+ if (lamalef_found != 0){
+ destSize = expandCompositChar(dest,sourceLength,destSize,options,pErrorCode,DESHAPE_MODE, shapeVars);
+ }
+ return destSize;
+}
+
+/*
+ ****************************************
+ * u_shapeArabic
+ ****************************************
+ */
+
+U_CAPI int32_t U_EXPORT2
+u_shapeArabic(const UChar *source, int32_t sourceLength,
+ UChar *dest, int32_t destCapacity,
+ uint32_t options,
+ UErrorCode *pErrorCode) {
+
+ int32_t destLength;
+ struct uShapeVariables shapeVars = { OLD_TAIL_CHAR,U_SHAPE_LAMALEF_BEGIN,U_SHAPE_LAMALEF_END,U_SHAPE_TASHKEEL_BEGIN,U_SHAPE_TASHKEEL_END,0};
+
+ /* 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_TASHKEEL_MASK) > 0) &&
+ ((options&U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED) == U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED) ) ||
+ (((options&U_SHAPE_TASHKEEL_MASK) > 0) &&
+ ((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_UNSHAPE)) ||
+ (options&U_SHAPE_DIGIT_TYPE_RESERVED)==U_SHAPE_DIGIT_TYPE_RESERVED ||
+ (options&U_SHAPE_DIGITS_MASK)==U_SHAPE_DIGITS_RESERVED ||
+ ((options&U_SHAPE_LAMALEF_MASK) != U_SHAPE_LAMALEF_RESIZE &&
+ (options&U_SHAPE_AGGREGATE_TASHKEEL_MASK) != 0) ||
+ ((options&U_SHAPE_AGGREGATE_TASHKEEL_MASK) == U_SHAPE_AGGREGATE_TASHKEEL &&
+ (options&U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED) != U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED)
+ )
+ {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+ /* Validate lamalef options */
+ if(((options&U_SHAPE_LAMALEF_MASK) > 0)&&
+ !(((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_BEGIN) ||
+ ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_END ) ||
+ ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_RESIZE )||
+ ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_AUTO) ||
+ ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_NEAR)))
+ {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+ /* Validate Tashkeel options */
+ if(((options&U_SHAPE_TASHKEEL_MASK) > 0)&&
+ !(((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_BEGIN) ||
+ ((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_END )
+ ||((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_RESIZE )||
+ ((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL)))
+ {
+ *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
+ return 0;
+ }
+ /* determine the source length */
+ if(sourceLength==-1) {
+ sourceLength=u_strlen(source);
+ }
+ if(sourceLength<=0) {
+ return u_terminateUChars(dest, destCapacity, 0, pErrorCode);
+ }
+
+ /* 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;
+ }
+
+ /* Does Options contain the new Seen Tail Unicode code point option */
+ if ( (options&U_SHAPE_TAIL_TYPE_MASK) == U_SHAPE_TAIL_NEW_UNICODE){
+ shapeVars.tailChar = NEW_TAIL_CHAR;
+ }else {
+ shapeVars.tailChar = OLD_TAIL_CHAR;
+ }
+
+ if((options&U_SHAPE_LETTERS_MASK)!=U_SHAPE_LETTERS_NOOP) {
+ UChar buffer[300];
+ UChar *tempbuffer, *tempsource = NULL;
+ int32_t outputSize, spacesCountl=0, spacesCountr=0;
+
+ if((options&U_SHAPE_AGGREGATE_TASHKEEL_MASK)>0) {
+ int32_t logical_order = (options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL;
+ int32_t aggregate_tashkeel =
+ (options&(U_SHAPE_AGGREGATE_TASHKEEL_MASK+U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED)) ==
+ (U_SHAPE_AGGREGATE_TASHKEEL+U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED);
+ int step=logical_order?1:-1;
+ int j=logical_order?-1:2*sourceLength;
+ int i=logical_order?-1:sourceLength;
+ int end=logical_order?sourceLength:-1;
+ int aggregation_possible = 1;
+ UChar prev = 0;
+ UChar prevLink, currLink = 0;
+ int newSourceLength = 0;
+ tempsource = (UChar *)uprv_malloc(2*sourceLength*U_SIZEOF_UCHAR);
+ if(tempsource == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return 0;
+ }
+
+ while ((i+=step) != end) {
+ prevLink = currLink;
+ currLink = getLink(source[i]);
+ if (aggregate_tashkeel && ((prevLink|currLink)&COMBINE) == COMBINE && aggregation_possible) {
+ aggregation_possible = 0;
+ tempsource[j] = (prev<source[i]?prev:source[i])-0x064C+0xFC5E;
+ currLink = getLink(tempsource[j]);
+ } else {
+ aggregation_possible = 1;
+ tempsource[j+=step] = source[i];
+ prev = source[i];
+ newSourceLength++;
+ }
+ }
+ source = tempsource+(logical_order?0:j);
+ sourceLength = newSourceLength;
+ }
+
+ /* calculate destination size */
+ /* TODO: do we ever need to do this pure preflighting? */
+ if(((options&U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_RESIZE) ||
+ ((options&U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_RESIZE)) {
+ outputSize=calculateSize(source,sourceLength,destCapacity,options);
+ } else {
+ outputSize=sourceLength;
+ }
+
+ if(outputSize>destCapacity) {
+ *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+ if (tempsource != NULL) uprv_free(tempsource);
+ return outputSize;
+ }
+
+ /*
+ * need a temporary buffer of size max(outputSize, sourceLength)
+ * because at first we copy source->temp
+ */
+ if(sourceLength>outputSize) {
+ outputSize=sourceLength;
+ }
+
+ /* Start of Arabic letter shaping part */
+ if(outputSize<=UPRV_LENGTHOF(buffer)) {
+ outputSize=UPRV_LENGTHOF(buffer);
+ tempbuffer=buffer;
+ } else {
+ tempbuffer = (UChar *)uprv_malloc(outputSize*U_SIZEOF_UCHAR);
+
+ /*Test for NULL*/
+ if(tempbuffer == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ if (tempsource != NULL) uprv_free(tempsource);
+ return 0;
+ }
+ }
+ u_memcpy(tempbuffer, source, sourceLength);
+ if (tempsource != NULL){
+ uprv_free(tempsource);
+ }
+
+ if(sourceLength<outputSize) {
+ uprv_memset(tempbuffer+sourceLength, 0, (outputSize-sourceLength)*U_SIZEOF_UCHAR);
+ }
+
+ if((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL) {
+ countSpaces(tempbuffer,sourceLength,options,&spacesCountl,&spacesCountr);
+ invertBuffer(tempbuffer,sourceLength,options,spacesCountl,spacesCountr);
+ }
+
+ if((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_VISUAL_LTR) {
+ if((options&U_SHAPE_SPACES_RELATIVE_TO_TEXT_MASK) == U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END) {
+ shapeVars.spacesRelativeToTextBeginEnd = 1;
+ shapeVars.uShapeLamalefBegin = U_SHAPE_LAMALEF_END;
+ shapeVars.uShapeLamalefEnd = U_SHAPE_LAMALEF_BEGIN;
+ shapeVars.uShapeTashkeelBegin = U_SHAPE_TASHKEEL_END;
+ shapeVars.uShapeTashkeelEnd = U_SHAPE_TASHKEEL_BEGIN;
+ }
+ }
+
+ switch(options&U_SHAPE_LETTERS_MASK) {
+ case U_SHAPE_LETTERS_SHAPE :
+ if( (options&U_SHAPE_TASHKEEL_MASK)> 0
+ && ((options&U_SHAPE_TASHKEEL_MASK) !=U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL)) {
+ /* Call the shaping function with tashkeel flag == 2 for removal of tashkeel */
+ destLength = shapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,2,shapeVars);
+ }else {
+ /* default Call the shaping function with tashkeel flag == 1 */
+ destLength = shapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,1,shapeVars);
+
+ /*After shaping text check if user wants to remove tashkeel and replace it with tatweel*/
+ if( (options&U_SHAPE_TASHKEEL_MASK) == U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL){
+ destLength = handleTashkeelWithTatweel(tempbuffer,destLength,destCapacity,options,pErrorCode);
+ }
+ }
+ break;
+ case U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED :
+ /* Call the shaping function with tashkeel flag == 0 */
+ destLength = shapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,0,shapeVars);
+ break;
+
+ case U_SHAPE_LETTERS_UNSHAPE :
+ /* Call the deshaping function */
+ destLength = deShapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,shapeVars);
+ break;
+ default :
+ /* will never occur because of validity checks above */
+ destLength = 0;
+ break;
+ }
+
+ /*
+ * TODO: (markus 2002aug01)
+ * For as long as we always preflight the outputSize above
+ * we should U_ASSERT(outputSize==destLength)
+ * except for the adjustment above before the tempbuffer allocation
+ */
+
+ if((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL) {
+ countSpaces(tempbuffer,destLength,options,&spacesCountl,&spacesCountr);
+ invertBuffer(tempbuffer,destLength,options,spacesCountl,spacesCountr);
+ }
+ u_memcpy(dest, tempbuffer, uprv_min(destLength, destCapacity));
+
+ if(tempbuffer!=buffer) {
+ uprv_free(tempbuffer);
+ }
+
+ if(destLength>destCapacity) {
+ *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+ return destLength;
+ }
+
+ /* End of Arabic letter shaping part */
+ } else {
+ /*
+ * No letter shaping:
+ * just make sure the destination is large enough and copy the string.
+ */
+ if(destCapacity<sourceLength) {
+ /* this catches preflighting, too */
+ *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
+ return sourceLength;
+ }
+ u_memcpy(dest, source, sourceLength);
+ destLength=sourceLength;
+ }
+
+ /*
+ * Perform number shaping.
+ * With UTF-16 or UTF-32, the length of the string is constant.
+ * The easiest way to do this is to operate on the destination and
+ * "shape" the digits in-place.
+ */
+ if((options&U_SHAPE_DIGITS_MASK)!=U_SHAPE_DIGITS_NOOP) {
+ UChar digitBase;
+ int32_t i;
+
+ /* select the requested digit group */
+ switch(options&U_SHAPE_DIGIT_TYPE_MASK) {
+ case U_SHAPE_DIGIT_TYPE_AN:
+ digitBase=0x660; /* Unicode: "Arabic-Indic digits" */
+ break;
+ case U_SHAPE_DIGIT_TYPE_AN_EXTENDED:
+ digitBase=0x6f0; /* Unicode: "Eastern Arabic-Indic digits (Persian and Urdu)" */
+ break;
+ default:
+ /* will never occur because of validity checks above */
+ digitBase=0;
+ break;
+ }
+
+ /* perform the requested operation */
+ switch(options&U_SHAPE_DIGITS_MASK) {
+ case U_SHAPE_DIGITS_EN2AN:
+ /* add (digitBase-'0') to each European (ASCII) digit code point */
+ digitBase-=0x30;
+ for(i=0; i<destLength; ++i) {
+ if(((uint32_t)dest[i]-0x30)<10) {
+ dest[i]+=digitBase;
+ }
+ }
+ break;
+ case U_SHAPE_DIGITS_AN2EN:
+ /* subtract (digitBase-'0') from each Arabic digit code point */
+ for(i=0; i<destLength; ++i) {
+ if(((uint32_t)dest[i]-(uint32_t)digitBase)<10) {
+ dest[i]-=digitBase-0x30;
+ }
+ }
+ break;
+ case U_SHAPE_DIGITS_ALEN2AN_INIT_LR:
+ _shapeToArabicDigitsWithContext(dest, destLength,
+ digitBase,
+ (UBool)((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_LOGICAL),
+ FALSE);
+ break;
+ case U_SHAPE_DIGITS_ALEN2AN_INIT_AL:
+ _shapeToArabicDigitsWithContext(dest, destLength,
+ digitBase,
+ (UBool)((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_LOGICAL),
+ TRUE);
+ break;
+ default:
+ /* will never occur because of validity checks above */
+ break;
+ }
+ }
+
+ return u_terminateUChars(dest, destCapacity, destLength, pErrorCode);
+}
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