icuSources/layout/IndicRearrangementProcessor2.cpp

   1 /*
   2  *
   3  * (C) Copyright IBM Corp.  and others 1998-2013 - All Rights Reserved
   4  *
   5  */
   6
   7 #include "LETypes.h"
   8 #include "MorphTables.h"
   9 #include "StateTables.h"
  10 #include "MorphStateTables.h"
  11 #include "SubtableProcessor2.h"
  12 #include "StateTableProcessor2.h"
  13 #include "IndicRearrangementProcessor2.h"
  14 #include "LEGlyphStorage.h"
  15 #include "LESwaps.h"
  16
  17 U_NAMESPACE_BEGIN
  18
  19 UOBJECT_DEFINE_RTTI_IMPLEMENTATION(IndicRearrangementProcessor2)
  20
  21 IndicRearrangementProcessor2::IndicRearrangementProcessor2(const MorphSubtableHeader2 *morphSubtableHeader)
  22   : StateTableProcessor2(morphSubtableHeader)
  23 {
  24     indicRearrangementSubtableHeader = (const IndicRearrangementSubtableHeader2 *) morphSubtableHeader;
  25     entryTable = (const IndicRearrangementStateEntry2 *) ((char *) &stateTableHeader->stHeader + entryTableOffset);
  26 }
  27
  28 IndicRearrangementProcessor2::~IndicRearrangementProcessor2()
  29 {
  30 }
  31
  32 void IndicRearrangementProcessor2::beginStateTable()
  33 {
  34     firstGlyph = 0;
  35     lastGlyph = 0;
  36 }
  37
  38 le_uint16 IndicRearrangementProcessor2::processStateEntry(LEGlyphStorage &glyphStorage, le_int32 &currGlyph, EntryTableIndex2 index)
  39 {
  40     const IndicRearrangementStateEntry2 *entry = &entryTable[index];
  41     le_uint16 newState = SWAPW(entry->newStateIndex); // index to the new state
  42     IndicRearrangementFlags  flags =  (IndicRearrangementFlags) SWAPW(entry->flags);
  43
  44     if (flags & irfMarkFirst) {
  45         firstGlyph = currGlyph;
  46     }
  47
  48     if (flags & irfMarkLast) {
  49         lastGlyph = currGlyph;
  50     }
  51
  52     doRearrangementAction(glyphStorage, (IndicRearrangementVerb) (flags & irfVerbMask));
  53
  54     if (!(flags & irfDontAdvance)) {
  55         currGlyph += dir;
  56     }
  57
  58     return newState; // index to new state
  59 }
  60
  61 void IndicRearrangementProcessor2::endStateTable()
  62 {
  63 }
  64
  65 void IndicRearrangementProcessor2::doRearrangementAction(LEGlyphStorage &glyphStorage, IndicRearrangementVerb verb) const
  66 {
  67     LEGlyphID a, b, c, d;
  68     le_int32 ia, ib, ic, id, ix, x;
  69     LEErrorCode success = LE_NO_ERROR;
  70
  71     switch(verb)
  72     {
  73     case irvNoAction:
  74         break;
  75
  76     case irvxA:
  77         a = glyphStorage[firstGlyph];
  78         ia = glyphStorage.getCharIndex(firstGlyph, success);
  79         x = firstGlyph + 1;
  80
  81         while (x <= lastGlyph) {
  82             glyphStorage[x - 1] = glyphStorage[x];
  83             ix = glyphStorage.getCharIndex(x, success);
  84             glyphStorage.setCharIndex(x - 1, ix, success);
  85             x += 1;
  86         }
  87
  88         glyphStorage[lastGlyph] = a;
  89         glyphStorage.setCharIndex(lastGlyph, ia, success);
  90         break;
  91
  92     case irvDx:
  93         d = glyphStorage[lastGlyph];
  94         id = glyphStorage.getCharIndex(lastGlyph, success);
  95         x = lastGlyph - 1;
  96
  97         while (x >= firstGlyph) {
  98             glyphStorage[x + 1] = glyphStorage[x];
  99             ix = glyphStorage.getCharIndex(x, success);
 100             glyphStorage.setCharIndex(x + 1, ix, success);
 101             x -= 1;
 102         }
 103
 104         glyphStorage[firstGlyph] = d;
 105         glyphStorage.setCharIndex(firstGlyph, id, success);
 106         break;
 107
 108     case irvDxA:
 109         a = glyphStorage[firstGlyph];
 110         ia = glyphStorage.getCharIndex(firstGlyph, success);
 111         id = glyphStorage.getCharIndex(lastGlyph,  success);
 112
 113         glyphStorage[firstGlyph] = glyphStorage[lastGlyph];
 114         glyphStorage[lastGlyph] = a;
 115
 116         glyphStorage.setCharIndex(firstGlyph, id, success);
 117         glyphStorage.setCharIndex(lastGlyph,  ia, success);
 118         break;
 119
 120     case irvxAB:
 121         a = glyphStorage[firstGlyph];
 122         b = glyphStorage[firstGlyph + 1];
 123         ia = glyphStorage.getCharIndex(firstGlyph, success);
 124         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 125         x = firstGlyph + 2;
 126
 127         while (x <= lastGlyph) {
 128             glyphStorage[x - 2] = glyphStorage[x];
 129             ix = glyphStorage.getCharIndex(x, success);
 130             glyphStorage.setCharIndex(x - 2, ix, success);
 131             x += 1;
 132         }
 133
 134         glyphStorage[lastGlyph - 1] = a;
 135         glyphStorage[lastGlyph] = b;
 136
 137         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 138         glyphStorage.setCharIndex(lastGlyph, ib, success);
 139         break;
 140
 141     case irvxBA:
 142         a = glyphStorage[firstGlyph];
 143         b = glyphStorage[firstGlyph + 1];
 144         ia = glyphStorage.getCharIndex(firstGlyph, success);
 145         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 146         x = firstGlyph + 2;
 147
 148         while (x <= lastGlyph) {
 149             glyphStorage[x - 2] = glyphStorage[x];
 150             ix = glyphStorage.getCharIndex(x, success);
 151             glyphStorage.setCharIndex(x - 2, ix, success);
 152             x += 1;
 153         }
 154
 155         glyphStorage[lastGlyph - 1] = b;
 156         glyphStorage[lastGlyph] = a;
 157
 158         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 159         glyphStorage.setCharIndex(lastGlyph, ia, success);
 160         break;
 161
 162     case irvCDx:
 163         c = glyphStorage[lastGlyph - 1];
 164         d = glyphStorage[lastGlyph];
 165         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 166         id = glyphStorage.getCharIndex(lastGlyph, success);
 167         x = lastGlyph - 2;
 168
 169         while (x >= firstGlyph) {
 170             glyphStorage[x + 2] = glyphStorage[x];
 171             ix = glyphStorage.getCharIndex(x, success);
 172             glyphStorage.setCharIndex(x + 2, ix, success);
 173             x -= 1;
 174         }
 175
 176         glyphStorage[firstGlyph] = c;
 177         glyphStorage[firstGlyph + 1] = d;
 178
 179         glyphStorage.setCharIndex(firstGlyph, ic, success);
 180         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 181         break;
 182
 183     case irvDCx:
 184         c = glyphStorage[lastGlyph - 1];
 185         d = glyphStorage[lastGlyph];
 186         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 187         id = glyphStorage.getCharIndex(lastGlyph, success);
 188         x = lastGlyph - 2;
 189
 190         while (x >= firstGlyph) {
 191             glyphStorage[x + 2] = glyphStorage[x];
 192             ix = glyphStorage.getCharIndex(x, success);
 193             glyphStorage.setCharIndex(x + 2, ix, success);
 194             x -= 1;
 195         }
 196
 197         glyphStorage[firstGlyph] = d;
 198         glyphStorage[firstGlyph + 1] = c;
 199
 200         glyphStorage.setCharIndex(firstGlyph, id, success);
 201         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 202         break;
 203
 204     case irvCDxA:
 205         a = glyphStorage[firstGlyph];
 206         c = glyphStorage[lastGlyph - 1];
 207         d = glyphStorage[lastGlyph];
 208         ia = glyphStorage.getCharIndex(firstGlyph, success);
 209         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 210         id = glyphStorage.getCharIndex(lastGlyph, success);
 211         x = lastGlyph - 2;
 212
 213         while (x > firstGlyph) {
 214             glyphStorage[x + 1] = glyphStorage[x];
 215             ix = glyphStorage.getCharIndex(x, success);
 216             glyphStorage.setCharIndex(x + 1, ix, success);
 217             x -= 1;
 218         }
 219
 220         glyphStorage[firstGlyph] = c;
 221         glyphStorage[firstGlyph + 1] = d;
 222         glyphStorage[lastGlyph] = a;
 223
 224         glyphStorage.setCharIndex(firstGlyph, ic, success);
 225         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 226         glyphStorage.setCharIndex(lastGlyph, ia, success);
 227         break;
 228
 229     case irvDCxA:
 230         a = glyphStorage[firstGlyph];
 231         c = glyphStorage[lastGlyph - 1];
 232         d = glyphStorage[lastGlyph];
 233         ia = glyphStorage.getCharIndex(firstGlyph, success);
 234         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 235         id = glyphStorage.getCharIndex(lastGlyph, success);
 236         x = lastGlyph - 2;
 237
 238         while (x > firstGlyph) {
 239             glyphStorage[x + 1] = glyphStorage[x];
 240             ix = glyphStorage.getCharIndex(x, success);
 241             glyphStorage.setCharIndex(x + 1, ix, success);
 242             x -= 1;
 243         }
 244
 245         glyphStorage[firstGlyph] = d;
 246         glyphStorage[firstGlyph + 1] = c;
 247         glyphStorage[lastGlyph] = a;
 248
 249         glyphStorage.setCharIndex(firstGlyph, id, success);
 250         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 251         glyphStorage.setCharIndex(lastGlyph, ia, success);
 252         break;
 253
 254     case irvDxAB:
 255         a = glyphStorage[firstGlyph];
 256         b = glyphStorage[firstGlyph + 1];
 257         d = glyphStorage[lastGlyph];
 258         ia = glyphStorage.getCharIndex(firstGlyph, success);
 259         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 260         id = glyphStorage.getCharIndex(lastGlyph, success);
 261         x = firstGlyph + 2;
 262
 263         while (x < lastGlyph) {
 264             glyphStorage[x - 2] = glyphStorage[x];
 265             ix = glyphStorage.getCharIndex(x, success);
 266             glyphStorage.setCharIndex(x - 2, ix, success);
 267             x += 1;
 268         }
 269
 270         glyphStorage[firstGlyph] = d;
 271         glyphStorage[lastGlyph - 1] = a;
 272         glyphStorage[lastGlyph] = b;
 273
 274         glyphStorage.setCharIndex(firstGlyph, id, success);
 275         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 276         glyphStorage.setCharIndex(lastGlyph, ib, success);
 277         break;
 278
 279     case irvDxBA:
 280         a = glyphStorage[firstGlyph];
 281         b = glyphStorage[firstGlyph + 1];
 282         d = glyphStorage[lastGlyph];
 283         ia = glyphStorage.getCharIndex(firstGlyph, success);
 284         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 285         id = glyphStorage.getCharIndex(lastGlyph, success);
 286         x = firstGlyph + 2;
 287
 288         while (x < lastGlyph) {
 289             glyphStorage[x - 2] = glyphStorage[x];
 290             ix = glyphStorage.getCharIndex(x, success);
 291             glyphStorage.setCharIndex(x - 2, ix, success);
 292             x += 1;
 293         }
 294
 295         glyphStorage[firstGlyph] = d;
 296         glyphStorage[lastGlyph - 1] = b;
 297         glyphStorage[lastGlyph] = a;
 298
 299         glyphStorage.setCharIndex(firstGlyph, id, success);
 300         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 301         glyphStorage.setCharIndex(lastGlyph, ia, success);
 302         break;
 303
 304     case irvCDxAB:
 305         a = glyphStorage[firstGlyph];
 306         b = glyphStorage[firstGlyph + 1];
 307
 308         glyphStorage[firstGlyph] = glyphStorage[lastGlyph - 1];
 309         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph];
 310
 311         glyphStorage[lastGlyph - 1] = a;
 312         glyphStorage[lastGlyph] = b;
 313
 314         ia = glyphStorage.getCharIndex(firstGlyph, success);
 315         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 316         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 317         id = glyphStorage.getCharIndex(lastGlyph, success);
 318
 319         glyphStorage.setCharIndex(firstGlyph, ic, success);
 320         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 321
 322         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 323         glyphStorage.setCharIndex(lastGlyph, ib, success);
 324         break;
 325
 326     case irvCDxBA:
 327         a = glyphStorage[firstGlyph];
 328         b = glyphStorage[firstGlyph + 1];
 329
 330         glyphStorage[firstGlyph] = glyphStorage[lastGlyph - 1];
 331         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph];
 332
 333         glyphStorage[lastGlyph - 1] = b;
 334         glyphStorage[lastGlyph] = a;
 335
 336         ia = glyphStorage.getCharIndex(firstGlyph, success);
 337         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 338         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 339         id = glyphStorage.getCharIndex(lastGlyph, success);
 340
 341         glyphStorage.setCharIndex(firstGlyph, ic, success);
 342         glyphStorage.setCharIndex(firstGlyph + 1, id, success);
 343
 344         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 345         glyphStorage.setCharIndex(lastGlyph, ia, success);
 346         break;
 347
 348     case irvDCxAB:
 349         a = glyphStorage[firstGlyph];
 350         b = glyphStorage[firstGlyph + 1];
 351
 352         glyphStorage[firstGlyph] = glyphStorage[lastGlyph];
 353         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph - 1];
 354
 355         glyphStorage[lastGlyph - 1] = a;
 356         glyphStorage[lastGlyph] = b;
 357
 358         ia = glyphStorage.getCharIndex(firstGlyph, success);
 359         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 360         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 361         id = glyphStorage.getCharIndex(lastGlyph, success);
 362
 363         glyphStorage.setCharIndex(firstGlyph, id, success);
 364         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 365
 366         glyphStorage.setCharIndex(lastGlyph - 1, ia, success);
 367         glyphStorage.setCharIndex(lastGlyph, ib, success);
 368         break;
 369
 370     case irvDCxBA:
 371         a = glyphStorage[firstGlyph];
 372         b = glyphStorage[firstGlyph + 1];
 373
 374         glyphStorage[firstGlyph] = glyphStorage[lastGlyph];
 375         glyphStorage[firstGlyph + 1] = glyphStorage[lastGlyph - 1];
 376
 377         glyphStorage[lastGlyph - 1] = b;
 378         glyphStorage[lastGlyph] = a;
 379
 380         ia = glyphStorage.getCharIndex(firstGlyph, success);
 381         ib = glyphStorage.getCharIndex(firstGlyph + 1, success);
 382         ic = glyphStorage.getCharIndex(lastGlyph - 1, success);
 383         id = glyphStorage.getCharIndex(lastGlyph, success);
 384
 385         glyphStorage.setCharIndex(firstGlyph, id, success);
 386         glyphStorage.setCharIndex(firstGlyph + 1, ic, success);
 387
 388         glyphStorage.setCharIndex(lastGlyph - 1, ib, success);
 389         glyphStorage.setCharIndex(lastGlyph, ia, success);
 390         break;
 391
 392     default:
 393         break;
 394     }
 395
 396 }
 397
 398 U_NAMESPACE_END