intl/icu/source/common/ushape.cpp@6474c204b198
intl/icu/source/common/ushape.cpp
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
1 /*
2 ******************************************************************************
3 *
4 * Copyright (C) 2000-2013, International Business Machines
5 * Corporation and others. All Rights Reserved.
6 *
7 ******************************************************************************
8 * file name: ushape.cpp
9 * encoding: US-ASCII
10 * tab size: 8 (not used)
11 * indentation:4
12 *
13 * created on: 2000jun29
14 * created by: Markus W. Scherer
15 *
16 * Arabic letter shaping implemented by Ayman Roshdy
17 */
19 #include "unicode/utypes.h"
20 #include "unicode/uchar.h"
21 #include "unicode/ustring.h"
22 #include "unicode/ushape.h"
23 #include "cmemory.h"
24 #include "putilimp.h"
25 #include "ustr_imp.h"
26 #include "ubidi_props.h"
27 #include "uassert.h"
29 #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0]))
31 /*
32 * This implementation is designed for 16-bit Unicode strings.
33 * The main assumption is that the Arabic characters and their
34 * presentation forms each fit into a single UChar.
35 * With UTF-8, they occupy 2 or 3 bytes, and more than the ASCII
36 * characters.
37 */
39 /*
40 * ### TODO in general for letter shaping:
41 * - the letter shaping code is UTF-16-unaware; needs update
42 * + especially invertBuffer()?!
43 * - needs to handle the "Arabic Tail" that is used in some legacy codepages
44 * as a glyph fragment of wide-glyph letters
45 * + IBM Unicode conversion tables map it to U+200B (ZWSP)
46 * + IBM Egypt has proposed to encode the tail in Unicode among Arabic Presentation Forms
47 * + Unicode 3.2 added U+FE73 ARABIC TAIL FRAGMENT
48 */
50 /* definitions for Arabic letter shaping ------------------------------------ */
52 #define IRRELEVANT 4
53 #define LAMTYPE 16
54 #define ALEFTYPE 32
55 #define LINKR 1
56 #define LINKL 2
57 #define APRESENT 8
58 #define SHADDA 64
59 #define CSHADDA 128
60 #define COMBINE (SHADDA+CSHADDA)
62 #define HAMZAFE_CHAR 0xfe80
63 #define HAMZA06_CHAR 0x0621
64 #define YEH_HAMZA_CHAR 0x0626
65 #define YEH_HAMZAFE_CHAR 0xFE89
66 #define LAMALEF_SPACE_SUB 0xFFFF
67 #define TASHKEEL_SPACE_SUB 0xFFFE
68 #define NEW_TAIL_CHAR 0xFE73
69 #define OLD_TAIL_CHAR 0x200B
70 #define LAM_CHAR 0x0644
71 #define SPACE_CHAR 0x0020
72 #define SHADDA_CHAR 0xFE7C
73 #define TATWEEL_CHAR 0x0640
74 #define SHADDA_TATWEEL_CHAR 0xFE7D
75 #define SHADDA06_CHAR 0x0651
77 #define SHAPE_MODE 0
78 #define DESHAPE_MODE 1
80 struct uShapeVariables {
81 UChar tailChar;
82 uint32_t uShapeLamalefBegin;
83 uint32_t uShapeLamalefEnd;
84 uint32_t uShapeTashkeelBegin;
85 uint32_t uShapeTashkeelEnd;
86 int spacesRelativeToTextBeginEnd;
87 };
89 static const uint8_t tailFamilyIsolatedFinal[] = {
90 /* FEB1 */ 1,
91 /* FEB2 */ 1,
92 /* FEB3 */ 0,
93 /* FEB4 */ 0,
94 /* FEB5 */ 1,
95 /* FEB6 */ 1,
96 /* FEB7 */ 0,
97 /* FEB8 */ 0,
98 /* FEB9 */ 1,
99 /* FEBA */ 1,
100 /* FEBB */ 0,
101 /* FEBC */ 0,
102 /* FEBD */ 1,
103 /* FEBE */ 1
104 };
106 static const uint8_t tashkeelMedial[] = {
107 /* FE70 */ 0,
108 /* FE71 */ 1,
109 /* FE72 */ 0,
110 /* FE73 */ 0,
111 /* FE74 */ 0,
112 /* FE75 */ 0,
113 /* FE76 */ 0,
114 /* FE77 */ 1,
115 /* FE78 */ 0,
116 /* FE79 */ 1,
117 /* FE7A */ 0,
118 /* FE7B */ 1,
119 /* FE7C */ 0,
120 /* FE7D */ 1,
121 /* FE7E */ 0,
122 /* FE7F */ 1
123 };
125 static const UChar yehHamzaToYeh[] =
126 {
127 /* isolated*/ 0xFEEF,
128 /* final */ 0xFEF0
129 };
131 static const uint8_t IrrelevantPos[] = {
132 0x0, 0x2, 0x4, 0x6,
133 0x8, 0xA, 0xC, 0xE
134 };
137 static const UChar convertLamAlef[] =
138 {
139 /*FEF5*/ 0x0622,
140 /*FEF6*/ 0x0622,
141 /*FEF7*/ 0x0623,
142 /*FEF8*/ 0x0623,
143 /*FEF9*/ 0x0625,
144 /*FEFA*/ 0x0625,
145 /*FEFB*/ 0x0627,
146 /*FEFC*/ 0x0627
147 };
149 static const UChar araLink[178]=
150 {
151 1 + 32 + 256 * 0x11,/*0x0622*/
152 1 + 32 + 256 * 0x13,/*0x0623*/
153 1 + 256 * 0x15,/*0x0624*/
154 1 + 32 + 256 * 0x17,/*0x0625*/
155 1 + 2 + 256 * 0x19,/*0x0626*/
156 1 + 32 + 256 * 0x1D,/*0x0627*/
157 1 + 2 + 256 * 0x1F,/*0x0628*/
158 1 + 256 * 0x23,/*0x0629*/
159 1 + 2 + 256 * 0x25,/*0x062A*/
160 1 + 2 + 256 * 0x29,/*0x062B*/
161 1 + 2 + 256 * 0x2D,/*0x062C*/
162 1 + 2 + 256 * 0x31,/*0x062D*/
163 1 + 2 + 256 * 0x35,/*0x062E*/
164 1 + 256 * 0x39,/*0x062F*/
165 1 + 256 * 0x3B,/*0x0630*/
166 1 + 256 * 0x3D,/*0x0631*/
167 1 + 256 * 0x3F,/*0x0632*/
168 1 + 2 + 256 * 0x41,/*0x0633*/
169 1 + 2 + 256 * 0x45,/*0x0634*/
170 1 + 2 + 256 * 0x49,/*0x0635*/
171 1 + 2 + 256 * 0x4D,/*0x0636*/
172 1 + 2 + 256 * 0x51,/*0x0637*/
173 1 + 2 + 256 * 0x55,/*0x0638*/
174 1 + 2 + 256 * 0x59,/*0x0639*/
175 1 + 2 + 256 * 0x5D,/*0x063A*/
176 0, 0, 0, 0, 0, /*0x063B-0x063F*/
177 1 + 2, /*0x0640*/
178 1 + 2 + 256 * 0x61,/*0x0641*/
179 1 + 2 + 256 * 0x65,/*0x0642*/
180 1 + 2 + 256 * 0x69,/*0x0643*/
181 1 + 2 + 16 + 256 * 0x6D,/*0x0644*/
182 1 + 2 + 256 * 0x71,/*0x0645*/
183 1 + 2 + 256 * 0x75,/*0x0646*/
184 1 + 2 + 256 * 0x79,/*0x0647*/
185 1 + 256 * 0x7D,/*0x0648*/
186 1 + 256 * 0x7F,/*0x0649*/
187 1 + 2 + 256 * 0x81,/*0x064A*/
188 4 + 256 * 1, /*0x064B*/
189 4 + 128 + 256 * 1, /*0x064C*/
190 4 + 128 + 256 * 1, /*0x064D*/
191 4 + 128 + 256 * 1, /*0x064E*/
192 4 + 128 + 256 * 1, /*0x064F*/
193 4 + 128 + 256 * 1, /*0x0650*/
194 4 + 64 + 256 * 3, /*0x0651*/
195 4 + 256 * 1, /*0x0652*/
196 4 + 256 * 7, /*0x0653*/
197 4 + 256 * 8, /*0x0654*/
198 4 + 256 * 8, /*0x0655*/
199 4 + 256 * 1, /*0x0656*/
200 0, 0, 0, 0, 0, /*0x0657-0x065B*/
201 1 + 256 * 0x85,/*0x065C*/
202 1 + 256 * 0x87,/*0x065D*/
203 1 + 256 * 0x89,/*0x065E*/
204 1 + 256 * 0x8B,/*0x065F*/
205 0, 0, 0, 0, 0, /*0x0660-0x0664*/
206 0, 0, 0, 0, 0, /*0x0665-0x0669*/
207 0, 0, 0, 0, 0, 0, /*0x066A-0x066F*/
208 4 + 256 * 6, /*0x0670*/
209 1 + 8 + 256 * 0x00,/*0x0671*/
210 1 + 32, /*0x0672*/
211 1 + 32, /*0x0673*/
212 0, /*0x0674*/
213 1 + 32, /*0x0675*/
214 1, 1, /*0x0676-0x0677*/
215 1+2, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x0678-0x067D*/
216 1+2+8+256 * 0x06, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x067E-0x0683*/
217 1+2, 1+2, 1+2+8+256 * 0x2A, 1+2, /*0x0684-0x0687*/
218 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*0x0688-0x0691*/
219 1, 1, 1, 1, 1, 1, 1+8+256 * 0x3A, 1, /*0x0692-0x0699*/
220 1+2, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x069A-0x06A3*/
221 1+2, 1+2, 1+2, 1+2, /*0x069A-0x06A3*/
222 1+2, 1+2, 1+2, 1+2, 1+2, 1+2+8+256 * 0x3E, /*0x06A4-0x06AD*/
223 1+2, 1+2, 1+2, 1+2, /*0x06A4-0x06AD*/
224 1+2, 1+2+8+256 * 0x42, 1+2, 1+2, 1+2, 1+2, /*0x06AE-0x06B7*/
225 1+2, 1+2, 1+2, 1+2, /*0x06AE-0x06B7*/
226 1+2, 1+2, 1+2, 1+2, 1+2, 1+2, /*0x06B8-0x06BF*/
227 1+2, 1+2, /*0x06B8-0x06BF*/
228 1, /*0x06C0*/
229 1+2, /*0x06C1*/
230 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /*0x06C2-0x06CB*/
231 1+2+8+256 * 0xAC, /*0x06CC*/
232 1, /*0x06CD*/
233 1+2, 1+2, 1+2, 1+2, /*0x06CE-0x06D1*/
234 1, 1 /*0x06D2-0x06D3*/
235 };
237 static const uint8_t presALink[] = {
238 /***********0*****1*****2*****3*****4*****5*****6*****7*****8*****9*****A*****B*****C*****D*****E*****F*/
239 /*FB5*/ 0, 1, 0, 0, 0, 0, 0, 1, 2,1 + 2, 0, 0, 0, 0, 0, 0,
240 /*FB6*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
241 /*FB7*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2,1 + 2, 0, 0,
242 /*FB8*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1,
243 /*FB9*/ 2,1 + 2, 0, 1, 2,1 + 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
244 /*FBA*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
245 /*FBB*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
246 /*FBC*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
247 /*FBD*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
248 /*FBE*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
249 /*FBF*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2,1 + 2,
250 /*FC0*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
251 /*FC1*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
252 /*FC2*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
253 /*FC3*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
254 /*FC4*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
255 /*FC5*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 4,
256 /*FC6*/ 4, 4, 4
257 };
259 static const uint8_t presBLink[]=
260 {
261 /***********0*****1*****2*****3*****4*****5*****6*****7*****8*****9*****A*****B*****C*****D*****E*****F*/
262 /*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,
263 /*FE8*/ 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2,1 + 2, 0, 1, 0,
264 /*FE9*/ 1, 2,1 + 2, 0, 1, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
265 /*FEA*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 0, 1, 0, 1, 0,
266 /*FEB*/ 1, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
267 /*FEC*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
268 /*FED*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,
269 /*FEE*/1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 2,1 + 2, 0, 1, 0,
270 /*FEF*/ 1, 0, 1, 2,1 + 2, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0
271 };
273 static const UChar convertFBto06[] =
274 {
275 /***********0******1******2******3******4******5******6******7******8******9******A******B******C******D******E******F***/
276 /*FB5*/ 0x671, 0x671, 0, 0, 0, 0, 0x67E, 0x67E, 0x67E, 0x67E, 0, 0, 0, 0, 0, 0,
277 /*FB6*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
278 /*FB7*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x686, 0x686, 0x686, 0x686, 0, 0,
279 /*FB8*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x698, 0x698, 0, 0, 0x6A9, 0x6A9,
280 /*FB9*/ 0x6A9, 0x6A9, 0x6AF, 0x6AF, 0x6AF, 0x6AF, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
281 /*FBA*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
282 /*FBB*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
283 /*FBC*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
284 /*FBD*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
285 /*FBE*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
286 /*FBF*/ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x6CC, 0x6CC, 0x6CC, 0x6CC
287 };
289 static const UChar convertFEto06[] =
290 {
291 /***********0******1******2******3******4******5******6******7******8******9******A******B******C******D******E******F***/
292 /*FE7*/ 0x64B, 0x64B, 0x64C, 0x64C, 0x64D, 0x64D, 0x64E, 0x64E, 0x64F, 0x64F, 0x650, 0x650, 0x651, 0x651, 0x652, 0x652,
293 /*FE8*/ 0x621, 0x622, 0x622, 0x623, 0x623, 0x624, 0x624, 0x625, 0x625, 0x626, 0x626, 0x626, 0x626, 0x627, 0x627, 0x628,
294 /*FE9*/ 0x628, 0x628, 0x628, 0x629, 0x629, 0x62A, 0x62A, 0x62A, 0x62A, 0x62B, 0x62B, 0x62B, 0x62B, 0x62C, 0x62C, 0x62C,
295 /*FEA*/ 0x62C, 0x62D, 0x62D, 0x62D, 0x62D, 0x62E, 0x62E, 0x62E, 0x62E, 0x62F, 0x62F, 0x630, 0x630, 0x631, 0x631, 0x632,
296 /*FEB*/ 0x632, 0x633, 0x633, 0x633, 0x633, 0x634, 0x634, 0x634, 0x634, 0x635, 0x635, 0x635, 0x635, 0x636, 0x636, 0x636,
297 /*FEC*/ 0x636, 0x637, 0x637, 0x637, 0x637, 0x638, 0x638, 0x638, 0x638, 0x639, 0x639, 0x639, 0x639, 0x63A, 0x63A, 0x63A,
298 /*FED*/ 0x63A, 0x641, 0x641, 0x641, 0x641, 0x642, 0x642, 0x642, 0x642, 0x643, 0x643, 0x643, 0x643, 0x644, 0x644, 0x644,
299 /*FEE*/ 0x644, 0x645, 0x645, 0x645, 0x645, 0x646, 0x646, 0x646, 0x646, 0x647, 0x647, 0x647, 0x647, 0x648, 0x648, 0x649,
300 /*FEF*/ 0x649, 0x64A, 0x64A, 0x64A, 0x64A, 0x65C, 0x65C, 0x65D, 0x65D, 0x65E, 0x65E, 0x65F, 0x65F
301 };
303 static const uint8_t shapeTable[4][4][4]=
304 {
305 { {0,0,0,0}, {0,0,0,0}, {0,1,0,3}, {0,1,0,1} },
306 { {0,0,2,2}, {0,0,1,2}, {0,1,1,2}, {0,1,1,3} },
307 { {0,0,0,0}, {0,0,0,0}, {0,1,0,3}, {0,1,0,3} },
308 { {0,0,1,2}, {0,0,1,2}, {0,1,1,2}, {0,1,1,3} }
309 };
311 /*
312 * This function shapes European digits to Arabic-Indic digits
313 * in-place, writing over the input characters.
314 * Since we know that we are only looking for BMP code points,
315 * we can safely just work with code units (again, at least UTF-16).
316 */
317 static void
318 _shapeToArabicDigitsWithContext(UChar *s, int32_t length,
319 UChar digitBase,
320 UBool isLogical, UBool lastStrongWasAL) {
321 const UBiDiProps *bdp;
322 int32_t i;
323 UChar c;
325 bdp=ubidi_getSingleton();
326 digitBase-=0x30;
328 /* the iteration direction depends on the type of input */
329 if(isLogical) {
330 for(i=0; i<length; ++i) {
331 c=s[i];
332 switch(ubidi_getClass(bdp, c)) {
333 case U_LEFT_TO_RIGHT: /* L */
334 case U_RIGHT_TO_LEFT: /* R */
335 lastStrongWasAL=FALSE;
336 break;
337 case U_RIGHT_TO_LEFT_ARABIC: /* AL */
338 lastStrongWasAL=TRUE;
339 break;
340 case U_EUROPEAN_NUMBER: /* EN */
341 if(lastStrongWasAL && (uint32_t)(c-0x30)<10) {
342 s[i]=(UChar)(digitBase+c); /* digitBase+(c-0x30) - digitBase was modified above */
343 }
344 break;
345 default :
346 break;
347 }
348 }
349 } else {
350 for(i=length; i>0; /* pre-decrement in the body */) {
351 c=s[--i];
352 switch(ubidi_getClass(bdp, c)) {
353 case U_LEFT_TO_RIGHT: /* L */
354 case U_RIGHT_TO_LEFT: /* R */
355 lastStrongWasAL=FALSE;
356 break;
357 case U_RIGHT_TO_LEFT_ARABIC: /* AL */
358 lastStrongWasAL=TRUE;
359 break;
360 case U_EUROPEAN_NUMBER: /* EN */
361 if(lastStrongWasAL && (uint32_t)(c-0x30)<10) {
362 s[i]=(UChar)(digitBase+c); /* digitBase+(c-0x30) - digitBase was modified above */
363 }
364 break;
365 default :
366 break;
367 }
368 }
369 }
370 }
372 /*
373 *Name : invertBuffer
374 *Function : This function inverts the buffer, it's used
375 * in case the user specifies the buffer to be
376 * U_SHAPE_TEXT_DIRECTION_LOGICAL
377 */
378 static void
379 invertBuffer(UChar *buffer, int32_t size, uint32_t /*options*/, int32_t lowlimit, int32_t highlimit) {
380 UChar temp;
381 int32_t i=0,j=0;
382 for(i=lowlimit,j=size-highlimit-1;i<j;i++,j--) {
383 temp = buffer[i];
384 buffer[i] = buffer[j];
385 buffer[j] = temp;
386 }
387 }
389 /*
390 *Name : changeLamAlef
391 *Function : Converts the Alef characters into an equivalent
392 * LamAlef location in the 0x06xx Range, this is an
393 * intermediate stage in the operation of the program
394 * later it'll be converted into the 0xFExx LamAlefs
395 * in the shaping function.
396 */
397 static inline UChar
398 changeLamAlef(UChar ch) {
399 switch(ch) {
400 case 0x0622 :
401 return 0x065C;
402 case 0x0623 :
403 return 0x065D;
404 case 0x0625 :
405 return 0x065E;
406 case 0x0627 :
407 return 0x065F;
408 }
409 return 0;
410 }
412 /*
413 *Name : getLink
414 *Function : Resolves the link between the characters as
415 * Arabic characters have four forms :
416 * Isolated, Initial, Middle and Final Form
417 */
418 static UChar
419 getLink(UChar ch) {
420 if(ch >= 0x0622 && ch <= 0x06D3) {
421 return(araLink[ch-0x0622]);
422 } else if(ch == 0x200D) {
423 return(3);
424 } else if(ch >= 0x206D && ch <= 0x206F) {
425 return(4);
426 }else if(ch >= 0xFB50 && ch <= 0xFC62) {
427 return(presALink[ch-0xFB50]);
428 } else if(ch >= 0xFE70 && ch <= 0xFEFC) {
429 return(presBLink[ch-0xFE70]);
430 }else {
431 return(0);
432 }
433 }
435 /*
436 *Name : countSpaces
437 *Function : Counts the number of spaces
438 * at each end of the logical buffer
439 */
440 static void
441 countSpaces(UChar *dest, int32_t size, uint32_t /*options*/, int32_t *spacesCountl, int32_t *spacesCountr) {
442 int32_t i = 0;
443 int32_t countl = 0,countr = 0;
444 while((dest[i] == SPACE_CHAR) && (countl < size)) {
445 countl++;
446 i++;
447 }
448 if (countl < size) { /* the entire buffer is not all space */
449 while(dest[size-1] == SPACE_CHAR) {
450 countr++;
451 size--;
452 }
453 }
454 *spacesCountl = countl;
455 *spacesCountr = countr;
456 }
458 /*
459 *Name : isTashkeelChar
460 *Function : Returns 1 for Tashkeel characters in 06 range else return 0
461 */
462 static inline int32_t
463 isTashkeelChar(UChar ch) {
464 return (int32_t)( ch>=0x064B && ch<= 0x0652 );
465 }
467 /*
468 *Name : isTashkeelCharFE
469 *Function : Returns 1 for Tashkeel characters in FE range else return 0
470 */
471 static inline int32_t
472 isTashkeelCharFE(UChar ch) {
473 return (int32_t)( ch>=0xFE70 && ch<= 0xFE7F );
474 }
476 /*
477 *Name : isAlefChar
478 *Function : Returns 1 for Alef characters else return 0
479 */
480 static inline int32_t
481 isAlefChar(UChar ch) {
482 return (int32_t)( (ch==0x0622)||(ch==0x0623)||(ch==0x0625)||(ch==0x0627) );
483 }
485 /*
486 *Name : isLamAlefChar
487 *Function : Returns 1 for LamAlef characters else return 0
488 */
489 static inline int32_t
490 isLamAlefChar(UChar ch) {
491 return (int32_t)((ch>=0xFEF5)&&(ch<=0xFEFC) );
492 }
494 /*BIDI
495 *Name : isTailChar
496 *Function : returns 1 if the character matches one of the tail characters (0xfe73 or 0x200b) otherwise returns 0
497 */
499 static inline int32_t
500 isTailChar(UChar ch) {
501 if(ch == OLD_TAIL_CHAR || ch == NEW_TAIL_CHAR){
502 return 1;
503 }else{
504 return 0;
505 }
506 }
508 /*BIDI
509 *Name : isSeenTailFamilyChar
510 *Function : returns 1 if the character is a seen family isolated character
511 * in the FE range otherwise returns 0
512 */
514 static inline int32_t
515 isSeenTailFamilyChar(UChar ch) {
516 if(ch >= 0xfeb1 && ch < 0xfebf){
517 return tailFamilyIsolatedFinal [ch - 0xFEB1];
518 }else{
519 return 0;
520 }
521 }
523 /* Name : isSeenFamilyChar
524 * Function : returns 1 if the character is a seen family character in the Unicode
525 * 06 range otherwise returns 0
526 */
528 static inline int32_t
529 isSeenFamilyChar(UChar ch){
530 if(ch >= 0x633 && ch <= 0x636){
531 return 1;
532 }else {
533 return 0;
534 }
535 }
537 /*Start of BIDI*/
538 /*
539 *Name : isAlefMaksouraChar
540 *Function : returns 1 if the character is a Alef Maksoura Final or isolated
541 * otherwise returns 0
542 */
543 static inline int32_t
544 isAlefMaksouraChar(UChar ch) {
545 return (int32_t)( (ch == 0xFEEF) || ( ch == 0xFEF0) || (ch == 0x0649));
546 }
548 /*
549 * Name : isYehHamzaChar
550 * Function : returns 1 if the character is a yehHamza isolated or yehhamza
551 * final is found otherwise returns 0
552 */
553 static inline int32_t
554 isYehHamzaChar(UChar ch) {
555 if((ch==0xFE89)||(ch==0xFE8A)){
556 return 1;
557 }else{
558 return 0;
559 }
560 }
562 /*
563 * Name: isTashkeelOnTatweelChar
564 * Function: Checks if the Tashkeel Character is on Tatweel or not,if the
565 * Tashkeel on tatweel (FE range), it returns 1 else if the
566 * Tashkeel with shadda on tatweel (FC range)return 2 otherwise
567 * returns 0
568 */
569 static inline int32_t
570 isTashkeelOnTatweelChar(UChar ch){
571 if(ch >= 0xfe70 && ch <= 0xfe7f && ch != NEW_TAIL_CHAR && ch != 0xFE75 && ch != SHADDA_TATWEEL_CHAR)
572 {
573 return tashkeelMedial [ch - 0xFE70];
574 }else if( (ch >= 0xfcf2 && ch <= 0xfcf4) || (ch == SHADDA_TATWEEL_CHAR)) {
575 return 2;
576 }else{
577 return 0;
578 }
579 }
581 /*
582 * Name: isIsolatedTashkeelChar
583 * Function: Checks if the Tashkeel Character is in the isolated form
584 * (i.e. Unicode FE range) returns 1 else if the Tashkeel
585 * with shadda is in the isolated form (i.e. Unicode FC range)
586 * returns 2 otherwise returns 0
587 */
588 static inline int32_t
589 isIsolatedTashkeelChar(UChar ch){
590 if(ch >= 0xfe70 && ch <= 0xfe7f && ch != NEW_TAIL_CHAR && ch != 0xFE75){
591 return (1 - tashkeelMedial [ch - 0xFE70]);
592 }else if(ch >= 0xfc5e && ch <= 0xfc63){
593 return 1;
594 }else{
595 return 0;
596 }
597 }
602 /*
603 *Name : calculateSize
604 *Function : This function calculates the destSize to be used in preflighting
605 * when the destSize is equal to 0
606 * It is used also to calculate the new destsize in case the
607 * destination buffer will be resized.
608 */
610 static int32_t
611 calculateSize(const UChar *source, int32_t sourceLength,
612 int32_t destSize,uint32_t options) {
613 int32_t i = 0;
615 int lamAlefOption = 0;
616 int tashkeelOption = 0;
618 destSize = sourceLength;
620 if (((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_SHAPE ||
621 ((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED )) &&
622 ((options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE )){
623 lamAlefOption = 1;
624 }
625 if((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_SHAPE &&
626 ((options&U_SHAPE_TASHKEEL_MASK) == U_SHAPE_TASHKEEL_RESIZE ) ){
627 tashkeelOption = 1;
628 }
630 if(lamAlefOption || tashkeelOption){
631 if((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_VISUAL_LTR) {
632 for(i=0;i<sourceLength;i++) {
633 if( ((isAlefChar(source[i]))&& (i<(sourceLength-1)) &&(source[i+1] == LAM_CHAR)) || (isTashkeelCharFE(source[i])) ) {
634 destSize--;
635 }
636 }
637 }else if((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_LOGICAL) {
638 for(i=0;i<sourceLength;i++) {
639 if( ( (source[i] == LAM_CHAR) && (i<(sourceLength-1)) && (isAlefChar(source[i+1]))) || (isTashkeelCharFE(source[i])) ) {
640 destSize--;
641 }
642 }
643 }
644 }
646 if ((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_UNSHAPE){
647 if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE){
648 for(i=0;i<sourceLength;i++) {
649 if(isLamAlefChar(source[i]))
650 destSize++;
651 }
652 }
653 }
655 return destSize;
656 }
658 /*
659 *Name : handleTashkeelWithTatweel
660 *Function : Replaces Tashkeel as following:
661 * Case 1 :if the Tashkeel on tatweel, replace it with Tatweel.
662 * Case 2 :if the Tashkeel aggregated with Shadda on Tatweel, replace
663 * it with Shadda on Tatweel.
664 * Case 3: if the Tashkeel is isolated replace it with Space.
665 *
666 */
667 static int32_t
668 handleTashkeelWithTatweel(UChar *dest, int32_t sourceLength,
669 int32_t /*destSize*/, uint32_t /*options*/,
670 UErrorCode * /*pErrorCode*/) {
671 int i;
672 for(i = 0; i < sourceLength; i++){
673 if((isTashkeelOnTatweelChar(dest[i]) == 1)){
674 dest[i] = TATWEEL_CHAR;
675 }else if((isTashkeelOnTatweelChar(dest[i]) == 2)){
676 dest[i] = SHADDA_TATWEEL_CHAR;
677 }else if(isIsolatedTashkeelChar(dest[i]) && dest[i] != SHADDA_CHAR){
678 dest[i] = SPACE_CHAR;
679 }
680 }
681 return sourceLength;
682 }
686 /*
687 *Name : handleGeneratedSpaces
688 *Function : The shapeUnicode function converts Lam + Alef into LamAlef + space,
689 * and Tashkeel to space.
690 * handleGeneratedSpaces function puts these generated spaces
691 * according to the options the user specifies. LamAlef and Tashkeel
692 * spaces can be replaced at begin, at end, at near or decrease the
693 * buffer size.
694 *
695 * There is also Auto option for LamAlef and tashkeel, which will put
696 * the spaces at end of the buffer (or end of text if the user used
697 * the option U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END).
698 *
699 * If the text type was visual_LTR and the option
700 * U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END was selected the END
701 * option will place the space at the beginning of the buffer and
702 * BEGIN will place the space at the end of the buffer.
703 */
705 static int32_t
706 handleGeneratedSpaces(UChar *dest, int32_t sourceLength,
707 int32_t destSize,
708 uint32_t options,
709 UErrorCode *pErrorCode,struct uShapeVariables shapeVars ) {
711 int32_t i = 0, j = 0;
712 int32_t count = 0;
713 UChar *tempbuffer=NULL;
715 int lamAlefOption = 0;
716 int tashkeelOption = 0;
717 int shapingMode = SHAPE_MODE;
719 if (shapingMode == 0){
720 if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE ){
721 lamAlefOption = 1;
722 }
723 if ( (options&U_SHAPE_TASHKEEL_MASK) == U_SHAPE_TASHKEEL_RESIZE ){
724 tashkeelOption = 1;
725 }
726 }
728 tempbuffer = (UChar *)uprv_malloc((sourceLength+1)*U_SIZEOF_UCHAR);
729 /* Test for NULL */
730 if(tempbuffer == NULL) {
731 *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
732 return 0;
733 }
736 if (lamAlefOption || tashkeelOption){
737 uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
739 i = j = 0; count = 0;
740 while(i < sourceLength) {
741 if ( (lamAlefOption && dest[i] == LAMALEF_SPACE_SUB) ||
742 (tashkeelOption && dest[i] == TASHKEEL_SPACE_SUB) ){
743 j--;
744 count++;
745 } else {
746 tempbuffer[j] = dest[i];
747 }
748 i++;
749 j++;
750 }
752 while(count >= 0) {
753 tempbuffer[i] = 0x0000;
754 i--;
755 count--;
756 }
758 uprv_memcpy(dest, tempbuffer, sourceLength*U_SIZEOF_UCHAR);
759 destSize = u_strlen(dest);
760 }
762 lamAlefOption = 0;
764 if (shapingMode == 0){
765 if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_NEAR ){
766 lamAlefOption = 1;
767 }
768 }
770 if (lamAlefOption){
771 /* Lam+Alef is already shaped into LamAlef + FFFF */
772 i = 0;
773 while(i < sourceLength) {
774 if(lamAlefOption&&dest[i] == LAMALEF_SPACE_SUB){
775 dest[i] = SPACE_CHAR;
776 }
777 i++;
778 }
779 destSize = sourceLength;
780 }
781 lamAlefOption = 0;
782 tashkeelOption = 0;
784 if (shapingMode == 0) {
785 if ( ((options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefBegin) ||
786 (((options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_AUTO )
787 && (shapeVars.spacesRelativeToTextBeginEnd==1)) ) {
788 lamAlefOption = 1;
789 }
790 if ( (options&U_SHAPE_TASHKEEL_MASK) == shapeVars.uShapeTashkeelBegin ) {
791 tashkeelOption = 1;
792 }
793 }
795 if(lamAlefOption || tashkeelOption){
796 uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
798 i = j = sourceLength; count = 0;
800 while(i >= 0) {
801 if ( (lamAlefOption && dest[i] == LAMALEF_SPACE_SUB) ||
802 (tashkeelOption && dest[i] == TASHKEEL_SPACE_SUB) ){
803 j++;
804 count++;
805 }else {
806 tempbuffer[j] = dest[i];
807 }
808 i--;
809 j--;
810 }
812 for(i=0 ;i < count; i++){
813 tempbuffer[i] = SPACE_CHAR;
814 }
816 uprv_memcpy(dest, tempbuffer, sourceLength*U_SIZEOF_UCHAR);
817 destSize = sourceLength;
818 }
822 lamAlefOption = 0;
823 tashkeelOption = 0;
825 if (shapingMode == 0) {
826 if ( ((options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefEnd) ||
827 (((options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_AUTO )
828 && (shapeVars.spacesRelativeToTextBeginEnd==0)) ) {
829 lamAlefOption = 1;
830 }
831 if ( (options&U_SHAPE_TASHKEEL_MASK) == shapeVars.uShapeTashkeelEnd ){
832 tashkeelOption = 1;
833 }
834 }
836 if(lamAlefOption || tashkeelOption){
837 uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
839 i = j = 0; count = 0;
840 while(i < sourceLength) {
841 if ( (lamAlefOption && dest[i] == LAMALEF_SPACE_SUB) ||
842 (tashkeelOption && dest[i] == TASHKEEL_SPACE_SUB) ){
843 j--;
844 count++;
845 }else {
846 tempbuffer[j] = dest[i];
847 }
848 i++;
849 j++;
850 }
852 while(count >= 0) {
853 tempbuffer[i] = SPACE_CHAR;
854 i--;
855 count--;
856 }
858 uprv_memcpy(dest,tempbuffer, sourceLength*U_SIZEOF_UCHAR);
859 destSize = sourceLength;
860 }
863 if(tempbuffer){
864 uprv_free(tempbuffer);
865 }
867 return destSize;
868 }
870 /*
871 *Name :expandCompositCharAtBegin
872 *Function :Expands the LamAlef character to Lam and Alef consuming the required
873 * space from beginning of the buffer. If the text type was visual_LTR
874 * and the option U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END was selected
875 * the spaces will be located at end of buffer.
876 * If there are no spaces to expand the LamAlef, an error
877 * will be set to U_NO_SPACE_AVAILABLE as defined in utypes.h
878 */
880 static int32_t
881 expandCompositCharAtBegin(UChar *dest, int32_t sourceLength, int32_t destSize,UErrorCode *pErrorCode) {
882 int32_t i = 0,j = 0;
883 int32_t countl = 0;
884 UChar *tempbuffer=NULL;
886 tempbuffer = (UChar *)uprv_malloc((sourceLength+1)*U_SIZEOF_UCHAR);
888 /* Test for NULL */
889 if(tempbuffer == NULL) {
890 *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
891 return 0;
892 }
894 uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
896 i = 0;
897 while(dest[i] == SPACE_CHAR) {
898 countl++;
899 i++;
900 }
902 i = j = sourceLength-1;
904 while(i >= 0 && j >= 0) {
905 if( countl>0 && isLamAlefChar(dest[i])) {
906 tempbuffer[j] = LAM_CHAR;
907 /* to ensure the array index is within the range */
908 U_ASSERT(dest[i] >= 0xFEF5u
909 && dest[i]-0xFEF5u < sizeof(convertLamAlef)/sizeof(convertLamAlef[0]));
910 tempbuffer[j-1] = convertLamAlef[ dest[i] - 0xFEF5 ];
911 j--;
912 countl--;
913 }else {
914 if( countl == 0 && isLamAlefChar(dest[i]) ) {
915 *pErrorCode=U_NO_SPACE_AVAILABLE;
916 }
917 tempbuffer[j] = dest[i];
918 }
919 i--;
920 j--;
921 }
922 uprv_memcpy(dest, tempbuffer, sourceLength*U_SIZEOF_UCHAR);
924 uprv_free(tempbuffer);
926 destSize = sourceLength;
927 return destSize;
928 }
930 /*
931 *Name : expandCompositCharAtEnd
932 *Function : Expands the LamAlef character to Lam and Alef consuming the
933 * required space from end of the buffer. If the text type was
934 * Visual LTR and the option U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END
935 * was used, the spaces will be consumed from begin of buffer. If
936 * there are no spaces to expand the LamAlef, an error
937 * will be set to U_NO_SPACE_AVAILABLE as defined in utypes.h
938 */
940 static int32_t
941 expandCompositCharAtEnd(UChar *dest, int32_t sourceLength, int32_t destSize,UErrorCode *pErrorCode) {
942 int32_t i = 0,j = 0;
944 int32_t countr = 0;
945 int32_t inpsize = sourceLength;
947 UChar *tempbuffer=NULL;
948 tempbuffer = (UChar *)uprv_malloc((sourceLength+1)*U_SIZEOF_UCHAR);
950 /* Test for NULL */
951 if(tempbuffer == NULL) {
952 *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
953 return 0;
954 }
956 uprv_memset(tempbuffer, 0, (sourceLength+1)*U_SIZEOF_UCHAR);
958 while(dest[inpsize-1] == SPACE_CHAR) {
959 countr++;
960 inpsize--;
961 }
963 i = sourceLength - countr - 1;
964 j = sourceLength - 1;
966 while(i >= 0 && j >= 0) {
967 if( countr>0 && isLamAlefChar(dest[i]) ) {
968 tempbuffer[j] = LAM_CHAR;
969 tempbuffer[j-1] = convertLamAlef[ dest[i] - 0xFEF5 ];
970 j--;
971 countr--;
972 }else {
973 if ((countr == 0) && isLamAlefChar(dest[i]) ) {
974 *pErrorCode=U_NO_SPACE_AVAILABLE;
975 }
976 tempbuffer[j] = dest[i];
977 }
978 i--;
979 j--;
980 }
982 if(countr > 0) {
983 uprv_memmove(tempbuffer, tempbuffer+countr, sourceLength*U_SIZEOF_UCHAR);
984 if(u_strlen(tempbuffer) < sourceLength) {
985 for(i=sourceLength-1;i>=sourceLength-countr;i--) {
986 tempbuffer[i] = SPACE_CHAR;
987 }
988 }
989 }
990 uprv_memcpy(dest, tempbuffer, sourceLength*U_SIZEOF_UCHAR);
992 uprv_free(tempbuffer);
994 destSize = sourceLength;
995 return destSize;
996 }
998 /*
999 *Name : expandCompositCharAtNear
1000 *Function : Expands the LamAlef character into Lam + Alef, YehHamza character
1001 * into Yeh + Hamza, SeenFamily character into SeenFamily character
1002 * + Tail, while consuming the space next to the character.
1003 * If there are no spaces next to the character, an error
1004 * will be set to U_NO_SPACE_AVAILABLE as defined in utypes.h
1005 */
1007 static int32_t
1008 expandCompositCharAtNear(UChar *dest, int32_t sourceLength, int32_t destSize,UErrorCode *pErrorCode,
1009 int yehHamzaOption, int seenTailOption, int lamAlefOption, struct uShapeVariables shapeVars) {
1010 int32_t i = 0;
1013 UChar lamalefChar, yehhamzaChar;
1015 for(i = 0 ;i<=sourceLength-1;i++) {
1016 if (seenTailOption && isSeenTailFamilyChar(dest[i])) {
1017 if ((i>0) && (dest[i-1] == SPACE_CHAR) ) {
1018 dest[i-1] = shapeVars.tailChar;
1019 }else {
1020 *pErrorCode=U_NO_SPACE_AVAILABLE;
1021 }
1022 }else if(yehHamzaOption && (isYehHamzaChar(dest[i])) ) {
1023 if ((i>0) && (dest[i-1] == SPACE_CHAR) ) {
1024 yehhamzaChar = dest[i];
1025 dest[i] = yehHamzaToYeh[yehhamzaChar - YEH_HAMZAFE_CHAR];
1026 dest[i-1] = HAMZAFE_CHAR;
1027 }else {
1029 *pErrorCode=U_NO_SPACE_AVAILABLE;
1030 }
1031 }else if(lamAlefOption && isLamAlefChar(dest[i+1])) {
1032 if(dest[i] == SPACE_CHAR){
1033 lamalefChar = dest[i+1];
1034 dest[i+1] = LAM_CHAR;
1035 dest[i] = convertLamAlef[ lamalefChar - 0xFEF5 ];
1036 }else {
1037 *pErrorCode=U_NO_SPACE_AVAILABLE;
1038 }
1039 }
1040 }
1041 destSize = sourceLength;
1042 return destSize;
1043 }
1044 /*
1045 * Name : expandCompositChar
1046 * Function : LamAlef, need special handling, since it expands from one
1047 * character into two characters while shaping or deshaping.
1048 * In order to expand it, near or far spaces according to the
1049 * options user specifies. Also buffer size can be increased.
1050 *
1051 * For SeenFamily characters and YehHamza only the near option is
1052 * supported, while for LamAlef we can take spaces from begin, end,
1053 * near or even increase the buffer size.
1054 * There is also the Auto option for LamAlef only, which will first
1055 * search for a space at end, begin then near, respectively.
1056 * If there are no spaces to expand these characters, an error will be set to
1057 * U_NO_SPACE_AVAILABLE as defined in utypes.h
1058 */
1060 static int32_t
1061 expandCompositChar(UChar *dest, int32_t sourceLength,
1062 int32_t destSize,uint32_t options,
1063 UErrorCode *pErrorCode, int shapingMode,struct uShapeVariables shapeVars) {
1065 int32_t i = 0,j = 0;
1067 UChar *tempbuffer=NULL;
1068 int yehHamzaOption = 0;
1069 int seenTailOption = 0;
1070 int lamAlefOption = 0;
1072 if (shapingMode == 1){
1073 if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_AUTO){
1075 if(shapeVars.spacesRelativeToTextBeginEnd == 0) {
1076 destSize = expandCompositCharAtEnd(dest, sourceLength, destSize, pErrorCode);
1078 if(*pErrorCode == U_NO_SPACE_AVAILABLE) {
1079 *pErrorCode = U_ZERO_ERROR;
1080 destSize = expandCompositCharAtBegin(dest, sourceLength, destSize, pErrorCode);
1081 }
1082 }else {
1083 destSize = expandCompositCharAtBegin(dest, sourceLength, destSize, pErrorCode);
1085 if(*pErrorCode == U_NO_SPACE_AVAILABLE) {
1086 *pErrorCode = U_ZERO_ERROR;
1087 destSize = expandCompositCharAtEnd(dest, sourceLength, destSize, pErrorCode);
1088 }
1089 }
1091 if(*pErrorCode == U_NO_SPACE_AVAILABLE) {
1092 *pErrorCode = U_ZERO_ERROR;
1093 destSize = expandCompositCharAtNear(dest, sourceLength, destSize, pErrorCode, yehHamzaOption,
1094 seenTailOption, 1,shapeVars);
1095 }
1096 }
1097 }
1099 if (shapingMode == 1){
1100 if ( (options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefEnd){
1101 destSize = expandCompositCharAtEnd(dest, sourceLength, destSize, pErrorCode);
1102 }
1103 }
1105 if (shapingMode == 1){
1106 if ( (options&U_SHAPE_LAMALEF_MASK) == shapeVars.uShapeLamalefBegin){
1107 destSize = expandCompositCharAtBegin(dest, sourceLength, destSize, pErrorCode);
1108 }
1109 }
1111 if (shapingMode == 0){
1112 if ((options&U_SHAPE_YEHHAMZA_MASK) == U_SHAPE_YEHHAMZA_TWOCELL_NEAR){
1113 yehHamzaOption = 1;
1114 }
1115 if ((options&U_SHAPE_SEEN_MASK) == U_SHAPE_SEEN_TWOCELL_NEAR){
1116 seenTailOption = 1;
1117 }
1118 }
1119 if (shapingMode == 1) {
1120 if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_NEAR) {
1121 lamAlefOption = 1;
1122 }
1123 }
1126 if (yehHamzaOption || seenTailOption || lamAlefOption){
1127 destSize = expandCompositCharAtNear(dest, sourceLength, destSize, pErrorCode, yehHamzaOption,
1128 seenTailOption,lamAlefOption,shapeVars);
1129 }
1132 if (shapingMode == 1){
1133 if ( (options&U_SHAPE_LAMALEF_MASK) == U_SHAPE_LAMALEF_RESIZE){
1134 destSize = calculateSize(dest,sourceLength,destSize,options);
1135 tempbuffer = (UChar *)uprv_malloc((destSize+1)*U_SIZEOF_UCHAR);
1137 /* Test for NULL */
1138 if(tempbuffer == NULL) {
1139 *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
1140 return 0;
1141 }
1143 uprv_memset(tempbuffer, 0, (destSize+1)*U_SIZEOF_UCHAR);
1145 i = j = 0;
1146 while(i < destSize && j < destSize) {
1147 if(isLamAlefChar(dest[i]) ) {
1148 tempbuffer[j] = convertLamAlef[ dest[i] - 0xFEF5 ];
1149 tempbuffer[j+1] = LAM_CHAR;
1150 j++;
1151 }else {
1152 tempbuffer[j] = dest[i];
1153 }
1154 i++;
1155 j++;
1156 }
1158 uprv_memcpy(dest, tempbuffer, destSize*U_SIZEOF_UCHAR);
1159 }
1160 }
1162 if(tempbuffer) {
1163 uprv_free(tempbuffer);
1164 }
1165 return destSize;
1166 }
1168 /*
1169 *Name : shapeUnicode
1170 *Function : Converts an Arabic Unicode buffer in 06xx Range into a shaped
1171 * arabic Unicode buffer in FExx Range
1172 */
1173 static int32_t
1174 shapeUnicode(UChar *dest, int32_t sourceLength,
1175 int32_t destSize,uint32_t options,
1176 UErrorCode *pErrorCode,
1177 int tashkeelFlag, struct uShapeVariables shapeVars) {
1179 int32_t i, iend;
1180 int32_t step;
1181 int32_t lastPos,Nx, Nw;
1182 unsigned int Shape;
1183 int32_t lamalef_found = 0;
1184 int32_t seenfamFound = 0, yehhamzaFound =0, tashkeelFound = 0;
1185 UChar prevLink = 0, lastLink = 0, currLink, nextLink = 0;
1186 UChar wLamalef;
1188 /*
1189 * Converts the input buffer from FExx Range into 06xx Range
1190 * to make sure that all characters are in the 06xx range
1191 * even the lamalef is converted to the special region in
1192 * the 06xx range
1193 */
1194 if ((options & U_SHAPE_PRESERVE_PRESENTATION_MASK) == U_SHAPE_PRESERVE_PRESENTATION_NOOP) {
1195 for (i = 0; i < sourceLength; i++) {
1196 UChar inputChar = dest[i];
1197 if ( (inputChar >= 0xFB50) && (inputChar <= 0xFBFF)) {
1198 UChar c = convertFBto06 [ (inputChar - 0xFB50) ];
1199 if (c != 0)
1200 dest[i] = c;
1201 } else if ( (inputChar >= 0xFE70) && (inputChar <= 0xFEFC)) {
1202 dest[i] = convertFEto06 [ (inputChar - 0xFE70) ] ;
1203 } else {
1204 dest[i] = inputChar ;
1205 }
1206 }
1207 }
1210 /* sets the index to the end of the buffer, together with the step point to -1 */
1211 i = sourceLength - 1;
1212 iend = -1;
1213 step = -1;
1215 /*
1216 * This function resolves the link between the characters .
1217 * Arabic characters have four forms :
1218 * Isolated Form, Initial Form, Middle Form and Final Form
1219 */
1220 currLink = getLink(dest[i]);
1222 lastPos = i;
1223 Nx = -2, Nw = 0;
1225 while (i != iend) {
1226 /* If high byte of currLink > 0 then more than one shape */
1227 if ((currLink & 0xFF00) > 0 || (getLink(dest[i]) & IRRELEVANT) != 0) {
1228 Nw = i + step;
1229 while (Nx < 0) { /* we need to know about next char */
1230 if(Nw == iend) {
1231 nextLink = 0;
1232 Nx = 3000;
1233 } else {
1234 nextLink = getLink(dest[Nw]);
1235 if((nextLink & IRRELEVANT) == 0) {
1236 Nx = Nw;
1237 } else {
1238 Nw = Nw + step;
1239 }
1240 }
1241 }
1243 if ( ((currLink & ALEFTYPE) > 0) && ((lastLink & LAMTYPE) > 0) ) {
1244 lamalef_found = 1;
1245 wLamalef = changeLamAlef(dest[i]); /*get from 0x065C-0x065f */
1246 if ( wLamalef != 0) {
1247 dest[i] = LAMALEF_SPACE_SUB; /* The default case is to drop the Alef and replace */
1248 dest[lastPos] =wLamalef; /* it by LAMALEF_SPACE_SUB which is the last character in the */
1249 i=lastPos; /* unicode private use area, this is done to make */
1250 } /* sure that removeLamAlefSpaces() handles only the */
1251 lastLink = prevLink; /* spaces generated during lamalef generation. */
1252 currLink = getLink(wLamalef); /* LAMALEF_SPACE_SUB is added here and is replaced by spaces */
1253 } /* in removeLamAlefSpaces() */
1255 if ((i > 0) && (dest[i-1] == SPACE_CHAR)){
1256 if ( isSeenFamilyChar(dest[i])) {
1257 seenfamFound = 1;
1258 } else if (dest[i] == YEH_HAMZA_CHAR) {
1259 yehhamzaFound = 1;
1260 }
1261 }
1262 else if(i==0){
1263 if ( isSeenFamilyChar(dest[i])){
1264 seenfamFound = 1;
1265 } else if (dest[i] == YEH_HAMZA_CHAR) {
1266 yehhamzaFound = 1;
1267 }
1268 }
1270 /*
1271 * get the proper shape according to link ability of neighbors
1272 * and of character; depends on the order of the shapes
1273 * (isolated, initial, middle, final) in the compatibility area
1274 */
1275 Shape = shapeTable[nextLink & (LINKR + LINKL)]
1276 [lastLink & (LINKR + LINKL)]
1277 [currLink & (LINKR + LINKL)];
1279 if ((currLink & (LINKR+LINKL)) == 1) {
1280 Shape &= 1;
1281 } else if(isTashkeelChar(dest[i])) {
1282 if( (lastLink & LINKL) && (nextLink & LINKR) && (tashkeelFlag == 1) &&
1283 dest[i] != 0x064C && dest[i] != 0x064D )
1284 {
1285 Shape = 1;
1286 if( (nextLink&ALEFTYPE) == ALEFTYPE && (lastLink&LAMTYPE) == LAMTYPE ) {
1287 Shape = 0;
1288 }
1289 } else if(tashkeelFlag == 2 && dest[i] == SHADDA06_CHAR){
1290 Shape = 1;
1291 } else {
1292 Shape = 0;
1293 }
1294 }
1295 if ((dest[i] ^ 0x0600) < 0x100) {
1296 if ( isTashkeelChar(dest[i]) ){
1297 if (tashkeelFlag == 2 && dest[i] != SHADDA06_CHAR){
1298 dest[i] = TASHKEEL_SPACE_SUB;
1299 tashkeelFound = 1;
1300 } else {
1301 /* to ensure the array index is within the range */
1302 U_ASSERT(dest[i] >= 0x064Bu
1303 && dest[i]-0x064Bu < sizeof(IrrelevantPos)/sizeof(IrrelevantPos[0]));
1304 dest[i] = 0xFE70 + IrrelevantPos[(dest[i] - 0x064B)] + Shape;
1305 }
1306 }else if ((currLink & APRESENT) > 0) {
1307 dest[i] = (UChar)(0xFB50 + (currLink >> 8) + Shape);
1308 }else if ((currLink >> 8) > 0 && (currLink & IRRELEVANT) == 0) {
1309 dest[i] = (UChar)(0xFE70 + (currLink >> 8) + Shape);
1310 }
1311 }
1312 }
1314 /* move one notch forward */
1315 if ((currLink & IRRELEVANT) == 0) {
1316 prevLink = lastLink;
1317 lastLink = currLink;
1318 lastPos = i;
1319 }
1321 i = i + step;
1322 if (i == Nx) {
1323 currLink = nextLink;
1324 Nx = -2;
1325 } else if(i != iend) {
1326 currLink = getLink(dest[i]);
1327 }
1328 }
1329 destSize = sourceLength;
1330 if ( (lamalef_found != 0 ) || (tashkeelFound != 0) ){
1331 destSize = handleGeneratedSpaces(dest,sourceLength,destSize,options,pErrorCode, shapeVars);
1332 }
1334 if ( (seenfamFound != 0) || (yehhamzaFound != 0) ) {
1335 destSize = expandCompositChar(dest, sourceLength,destSize,options,pErrorCode, SHAPE_MODE,shapeVars);
1336 }
1337 return destSize;
1338 }
1340 /*
1341 *Name : deShapeUnicode
1342 *Function : Converts an Arabic Unicode buffer in FExx Range into unshaped
1343 * arabic Unicode buffer in 06xx Range
1344 */
1345 static int32_t
1346 deShapeUnicode(UChar *dest, int32_t sourceLength,
1347 int32_t destSize,uint32_t options,
1348 UErrorCode *pErrorCode, struct uShapeVariables shapeVars) {
1349 int32_t i = 0;
1350 int32_t lamalef_found = 0;
1351 int32_t yehHamzaComposeEnabled = 0;
1352 int32_t seenComposeEnabled = 0;
1354 yehHamzaComposeEnabled = ((options&U_SHAPE_YEHHAMZA_MASK) == U_SHAPE_YEHHAMZA_TWOCELL_NEAR) ? 1 : 0;
1355 seenComposeEnabled = ((options&U_SHAPE_SEEN_MASK) == U_SHAPE_SEEN_TWOCELL_NEAR)? 1 : 0;
1357 /*
1358 *This for loop changes the buffer from the Unicode FE range to
1359 *the Unicode 06 range
1360 */
1362 for(i = 0; i < sourceLength; i++) {
1363 UChar inputChar = dest[i];
1364 if ( (inputChar >= 0xFB50) && (inputChar <= 0xFBFF)) { /* FBxx Arabic range */
1365 UChar c = convertFBto06 [ (inputChar - 0xFB50) ];
1366 if (c != 0)
1367 dest[i] = c;
1368 } else if( (yehHamzaComposeEnabled == 1) && ((inputChar == HAMZA06_CHAR) || (inputChar == HAMZAFE_CHAR))
1369 && (i < (sourceLength - 1)) && isAlefMaksouraChar(dest[i+1] )) {
1370 dest[i] = SPACE_CHAR;
1371 dest[i+1] = YEH_HAMZA_CHAR;
1372 } else if ( (seenComposeEnabled == 1) && (isTailChar(inputChar)) && (i< (sourceLength - 1))
1373 && (isSeenTailFamilyChar(dest[i+1])) ) {
1374 dest[i] = SPACE_CHAR;
1375 } else if (( inputChar >= 0xFE70) && (inputChar <= 0xFEF4 )) { /* FExx Arabic range */
1376 dest[i] = convertFEto06 [ (inputChar - 0xFE70) ];
1377 } else {
1378 dest[i] = inputChar ;
1379 }
1381 if( isLamAlefChar(dest[i]) )
1382 lamalef_found = 1;
1383 }
1385 destSize = sourceLength;
1386 if (lamalef_found != 0){
1387 destSize = expandCompositChar(dest,sourceLength,destSize,options,pErrorCode,DESHAPE_MODE, shapeVars);
1388 }
1389 return destSize;
1390 }
1392 /*
1393 ****************************************
1394 * u_shapeArabic
1395 ****************************************
1396 */
1398 U_CAPI int32_t U_EXPORT2
1399 u_shapeArabic(const UChar *source, int32_t sourceLength,
1400 UChar *dest, int32_t destCapacity,
1401 uint32_t options,
1402 UErrorCode *pErrorCode) {
1404 int32_t destLength;
1405 struct uShapeVariables shapeVars = { OLD_TAIL_CHAR,U_SHAPE_LAMALEF_BEGIN,U_SHAPE_LAMALEF_END,U_SHAPE_TASHKEEL_BEGIN,U_SHAPE_TASHKEEL_END,0};
1407 /* usual error checking */
1408 if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) {
1409 return 0;
1410 }
1412 /* make sure that no reserved options values are used; allow dest==NULL only for preflighting */
1413 if( source==NULL || sourceLength<-1 || (dest==NULL && destCapacity!=0) || destCapacity<0 ||
1414 (((options&U_SHAPE_TASHKEEL_MASK) > 0) &&
1415 ((options&U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED) == U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED) ) ||
1416 (((options&U_SHAPE_TASHKEEL_MASK) > 0) &&
1417 ((options&U_SHAPE_LETTERS_MASK) == U_SHAPE_LETTERS_UNSHAPE)) ||
1418 (options&U_SHAPE_DIGIT_TYPE_RESERVED)==U_SHAPE_DIGIT_TYPE_RESERVED ||
1419 (options&U_SHAPE_DIGITS_MASK)==U_SHAPE_DIGITS_RESERVED ||
1420 ((options&U_SHAPE_LAMALEF_MASK) != U_SHAPE_LAMALEF_RESIZE &&
1421 (options&U_SHAPE_AGGREGATE_TASHKEEL_MASK) != 0) ||
1422 ((options&U_SHAPE_AGGREGATE_TASHKEEL_MASK) == U_SHAPE_AGGREGATE_TASHKEEL &&
1423 (options&U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED) != U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED)
1424 )
1425 {
1426 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
1427 return 0;
1428 }
1429 /* Validate lamalef options */
1430 if(((options&U_SHAPE_LAMALEF_MASK) > 0)&&
1431 !(((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_BEGIN) ||
1432 ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_END ) ||
1433 ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_RESIZE )||
1434 ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_AUTO) ||
1435 ((options & U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_NEAR)))
1436 {
1437 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
1438 return 0;
1439 }
1440 /* Validate Tashkeel options */
1441 if(((options&U_SHAPE_TASHKEEL_MASK) > 0)&&
1442 !(((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_BEGIN) ||
1443 ((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_END )
1444 ||((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_RESIZE )||
1445 ((options & U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL)))
1446 {
1447 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
1448 return 0;
1449 }
1450 /* determine the source length */
1451 if(sourceLength==-1) {
1452 sourceLength=u_strlen(source);
1453 }
1454 if(sourceLength<=0) {
1455 return u_terminateUChars(dest, destCapacity, 0, pErrorCode);
1456 }
1458 /* check that source and destination do not overlap */
1459 if( dest!=NULL &&
1460 ((source<=dest && dest<source+sourceLength) ||
1461 (dest<=source && source<dest+destCapacity))) {
1462 *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR;
1463 return 0;
1464 }
1466 /* Does Options contain the new Seen Tail Unicode code point option */
1467 if ( (options&U_SHAPE_TAIL_TYPE_MASK) == U_SHAPE_TAIL_NEW_UNICODE){
1468 shapeVars.tailChar = NEW_TAIL_CHAR;
1469 }else {
1470 shapeVars.tailChar = OLD_TAIL_CHAR;
1471 }
1473 if((options&U_SHAPE_LETTERS_MASK)!=U_SHAPE_LETTERS_NOOP) {
1474 UChar buffer[300];
1475 UChar *tempbuffer, *tempsource = NULL;
1476 int32_t outputSize, spacesCountl=0, spacesCountr=0;
1478 if((options&U_SHAPE_AGGREGATE_TASHKEEL_MASK)>0) {
1479 int32_t logical_order = (options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL;
1480 int32_t aggregate_tashkeel =
1481 (options&(U_SHAPE_AGGREGATE_TASHKEEL_MASK+U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED)) ==
1482 (U_SHAPE_AGGREGATE_TASHKEEL+U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED);
1483 int step=logical_order?1:-1;
1484 int j=logical_order?-1:2*sourceLength;
1485 int i=logical_order?-1:sourceLength;
1486 int end=logical_order?sourceLength:-1;
1487 int aggregation_possible = 1;
1488 UChar prev = 0;
1489 UChar prevLink, currLink = 0;
1490 int newSourceLength = 0;
1491 tempsource = (UChar *)uprv_malloc(2*sourceLength*U_SIZEOF_UCHAR);
1492 if(tempsource == NULL) {
1493 *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
1494 return 0;
1495 }
1497 while ((i+=step) != end) {
1498 prevLink = currLink;
1499 currLink = getLink(source[i]);
1500 if (aggregate_tashkeel && ((prevLink|currLink)&COMBINE) == COMBINE && aggregation_possible) {
1501 aggregation_possible = 0;
1502 tempsource[j] = (prev<source[i]?prev:source[i])-0x064C+0xFC5E;
1503 currLink = getLink(tempsource[j]);
1504 } else {
1505 aggregation_possible = 1;
1506 tempsource[j+=step] = source[i];
1507 prev = source[i];
1508 newSourceLength++;
1509 }
1510 }
1511 source = tempsource+(logical_order?0:j);
1512 sourceLength = newSourceLength;
1513 }
1515 /* calculate destination size */
1516 /* TODO: do we ever need to do this pure preflighting? */
1517 if(((options&U_SHAPE_LAMALEF_MASK)==U_SHAPE_LAMALEF_RESIZE) ||
1518 ((options&U_SHAPE_TASHKEEL_MASK)==U_SHAPE_TASHKEEL_RESIZE)) {
1519 outputSize=calculateSize(source,sourceLength,destCapacity,options);
1520 } else {
1521 outputSize=sourceLength;
1522 }
1524 if(outputSize>destCapacity) {
1525 *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
1526 if (tempsource != NULL) uprv_free(tempsource);
1527 return outputSize;
1528 }
1530 /*
1531 * need a temporary buffer of size max(outputSize, sourceLength)
1532 * because at first we copy source->temp
1533 */
1534 if(sourceLength>outputSize) {
1535 outputSize=sourceLength;
1536 }
1538 /* Start of Arabic letter shaping part */
1539 if(outputSize<=LENGTHOF(buffer)) {
1540 outputSize=LENGTHOF(buffer);
1541 tempbuffer=buffer;
1542 } else {
1543 tempbuffer = (UChar *)uprv_malloc(outputSize*U_SIZEOF_UCHAR);
1545 /*Test for NULL*/
1546 if(tempbuffer == NULL) {
1547 *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
1548 if (tempsource != NULL) uprv_free(tempsource);
1549 return 0;
1550 }
1551 }
1552 uprv_memcpy(tempbuffer, source, sourceLength*U_SIZEOF_UCHAR);
1553 if (tempsource != NULL){
1554 uprv_free(tempsource);
1555 }
1557 if(sourceLength<outputSize) {
1558 uprv_memset(tempbuffer+sourceLength, 0, (outputSize-sourceLength)*U_SIZEOF_UCHAR);
1559 }
1561 if((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL) {
1562 countSpaces(tempbuffer,sourceLength,options,&spacesCountl,&spacesCountr);
1563 invertBuffer(tempbuffer,sourceLength,options,spacesCountl,spacesCountr);
1564 }
1566 if((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_VISUAL_LTR) {
1567 if((options&U_SHAPE_SPACES_RELATIVE_TO_TEXT_MASK) == U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END) {
1568 shapeVars.spacesRelativeToTextBeginEnd = 1;
1569 shapeVars.uShapeLamalefBegin = U_SHAPE_LAMALEF_END;
1570 shapeVars.uShapeLamalefEnd = U_SHAPE_LAMALEF_BEGIN;
1571 shapeVars.uShapeTashkeelBegin = U_SHAPE_TASHKEEL_END;
1572 shapeVars.uShapeTashkeelEnd = U_SHAPE_TASHKEEL_BEGIN;
1573 }
1574 }
1576 switch(options&U_SHAPE_LETTERS_MASK) {
1577 case U_SHAPE_LETTERS_SHAPE :
1578 if( (options&U_SHAPE_TASHKEEL_MASK)> 0
1579 && ((options&U_SHAPE_TASHKEEL_MASK) !=U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL)) {
1580 /* Call the shaping function with tashkeel flag == 2 for removal of tashkeel */
1581 destLength = shapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,2,shapeVars);
1582 }else {
1583 /* default Call the shaping function with tashkeel flag == 1 */
1584 destLength = shapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,1,shapeVars);
1586 /*After shaping text check if user wants to remove tashkeel and replace it with tatweel*/
1587 if( (options&U_SHAPE_TASHKEEL_MASK) == U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL){
1588 destLength = handleTashkeelWithTatweel(tempbuffer,destLength,destCapacity,options,pErrorCode);
1589 }
1590 }
1591 break;
1592 case U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED :
1593 /* Call the shaping function with tashkeel flag == 0 */
1594 destLength = shapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,0,shapeVars);
1595 break;
1597 case U_SHAPE_LETTERS_UNSHAPE :
1598 /* Call the deshaping function */
1599 destLength = deShapeUnicode(tempbuffer,sourceLength,destCapacity,options,pErrorCode,shapeVars);
1600 break;
1601 default :
1602 /* will never occur because of validity checks above */
1603 destLength = 0;
1604 break;
1605 }
1607 /*
1608 * TODO: (markus 2002aug01)
1609 * For as long as we always preflight the outputSize above
1610 * we should U_ASSERT(outputSize==destLength)
1611 * except for the adjustment above before the tempbuffer allocation
1612 */
1614 if((options&U_SHAPE_TEXT_DIRECTION_MASK) == U_SHAPE_TEXT_DIRECTION_LOGICAL) {
1615 countSpaces(tempbuffer,destLength,options,&spacesCountl,&spacesCountr);
1616 invertBuffer(tempbuffer,destLength,options,spacesCountl,spacesCountr);
1617 }
1618 uprv_memcpy(dest, tempbuffer, uprv_min(destLength, destCapacity)*U_SIZEOF_UCHAR);
1620 if(tempbuffer!=buffer) {
1621 uprv_free(tempbuffer);
1622 }
1624 if(destLength>destCapacity) {
1625 *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
1626 return destLength;
1627 }
1629 /* End of Arabic letter shaping part */
1630 } else {
1631 /*
1632 * No letter shaping:
1633 * just make sure the destination is large enough and copy the string.
1634 */
1635 if(destCapacity<sourceLength) {
1636 /* this catches preflighting, too */
1637 *pErrorCode=U_BUFFER_OVERFLOW_ERROR;
1638 return sourceLength;
1639 }
1640 uprv_memcpy(dest, source, sourceLength*U_SIZEOF_UCHAR);
1641 destLength=sourceLength;
1642 }
1644 /*
1645 * Perform number shaping.
1646 * With UTF-16 or UTF-32, the length of the string is constant.
1647 * The easiest way to do this is to operate on the destination and
1648 * "shape" the digits in-place.
1649 */
1650 if((options&U_SHAPE_DIGITS_MASK)!=U_SHAPE_DIGITS_NOOP) {
1651 UChar digitBase;
1652 int32_t i;
1654 /* select the requested digit group */
1655 switch(options&U_SHAPE_DIGIT_TYPE_MASK) {
1656 case U_SHAPE_DIGIT_TYPE_AN:
1657 digitBase=0x660; /* Unicode: "Arabic-Indic digits" */
1658 break;
1659 case U_SHAPE_DIGIT_TYPE_AN_EXTENDED:
1660 digitBase=0x6f0; /* Unicode: "Eastern Arabic-Indic digits (Persian and Urdu)" */
1661 break;
1662 default:
1663 /* will never occur because of validity checks above */
1664 digitBase=0;
1665 break;
1666 }
1668 /* perform the requested operation */
1669 switch(options&U_SHAPE_DIGITS_MASK) {
1670 case U_SHAPE_DIGITS_EN2AN:
1671 /* add (digitBase-'0') to each European (ASCII) digit code point */
1672 digitBase-=0x30;
1673 for(i=0; i<destLength; ++i) {
1674 if(((uint32_t)dest[i]-0x30)<10) {
1675 dest[i]+=digitBase;
1676 }
1677 }
1678 break;
1679 case U_SHAPE_DIGITS_AN2EN:
1680 /* subtract (digitBase-'0') from each Arabic digit code point */
1681 for(i=0; i<destLength; ++i) {
1682 if(((uint32_t)dest[i]-(uint32_t)digitBase)<10) {
1683 dest[i]-=digitBase-0x30;
1684 }
1685 }
1686 break;
1687 case U_SHAPE_DIGITS_ALEN2AN_INIT_LR:
1688 _shapeToArabicDigitsWithContext(dest, destLength,
1689 digitBase,
1690 (UBool)((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_LOGICAL),
1691 FALSE);
1692 break;
1693 case U_SHAPE_DIGITS_ALEN2AN_INIT_AL:
1694 _shapeToArabicDigitsWithContext(dest, destLength,
1695 digitBase,
1696 (UBool)((options&U_SHAPE_TEXT_DIRECTION_MASK)==U_SHAPE_TEXT_DIRECTION_LOGICAL),
1697 TRUE);
1698 break;
1699 default:
1700 /* will never occur because of validity checks above */
1701 break;
1702 }
1703 }
1705 return u_terminateUChars(dest, destCapacity, destLength, pErrorCode);
1706 }
