Java example source code file (StateTableProcessor2.cpp)

This example Java source code file (StateTableProcessor2.cpp) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

entrytableindex2, le_debug_bad_font, le_failure, le_get_glyph, le_state_patience_curr, le_state_patience_decr, le_state_patience_incr, leerrorcode, leglyphid, lereferenceto, lookupvalue, swapl, swapw, ttglyphid

The StateTableProcessor2.cpp Java example source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

/*
 *
 * (C) Copyright IBM Corp.  and others 1998-2013 - All Rights Reserved
 *
 */

#include "LETypes.h"
#include "MorphTables.h"
#include "StateTables.h"
#include "MorphStateTables.h"
#include "SubtableProcessor2.h"
#include "StateTableProcessor2.h"
#include "LEGlyphStorage.h"
#include "LESwaps.h"
#include "LookupTables.h"

U_NAMESPACE_BEGIN

StateTableProcessor2::StateTableProcessor2()
{
}

StateTableProcessor2::StateTableProcessor2(const LEReferenceTo<MorphSubtableHeader2> &morphSubtableHeader, LEErrorCode &success)
  : SubtableProcessor2(morphSubtableHeader, success), stateTableHeader(morphSubtableHeader, success),
    stHeader(stateTableHeader, success, (const StateTableHeader2*)&stateTableHeader->stHeader),
    nClasses(0), classTableOffset(0), stateArrayOffset(0), entryTableOffset(0), classTable(), format(0),
    stateArray()
{
  if (LE_FAILURE(success)) {
    return;
  }
  nClasses = SWAPL(stHeader->nClasses);
  classTableOffset = SWAPL(stHeader->classTableOffset);
  stateArrayOffset = SWAPL(stHeader->stateArrayOffset);
  entryTableOffset = SWAPL(stHeader->entryTableOffset);

  classTable = LEReferenceTo<LookupTable>(stHeader, success, classTableOffset);
  format = SWAPW(classTable->format);

  stateArray = LEReferenceToArrayOf<EntryTableIndex2>(stHeader, success, stateArrayOffset, LE_UNBOUNDED_ARRAY);
}

StateTableProcessor2::~StateTableProcessor2()
{
}

void StateTableProcessor2::process(LEGlyphStorage &glyphStorage, LEErrorCode &success)
{
    if (LE_FAILURE(success)) return;
    // Start at state 0
    // XXX: How do we know when to start at state 1?
    le_uint16 currentState = 0;
    le_int32 glyphCount = glyphStorage.getGlyphCount();

    LE_STATE_PATIENCE_INIT();

    le_int32 currGlyph = 0;
    if ((coverage & scfReverse2) != 0) {  // process glyphs in descending order
        currGlyph = glyphCount - 1;
        dir = -1;
    } else {
        dir = 1;
    }

    beginStateTable();
    switch (format) {
        case ltfSimpleArray: {
#ifdef TEST_FORMAT
          LEReferenceTo<SimpleArrayLookupTable> lookupTable0(classTable, success);
          if(LE_FAILURE(success)) break;
            while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
                if (LE_FAILURE(success)) break;
                if (LE_STATE_PATIENCE_DECR()) {
                  LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
                  break; // patience exceeded.
                }
                LookupValue classCode = classCodeOOB;
                if (currGlyph == glyphCount || currGlyph == -1) {
                    // XXX: How do we handle EOT vs. EOL?
                    classCode = classCodeEOT;
                } else {
                    LEGlyphID gid = glyphStorage[currGlyph];
                    TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);

                    if (glyphCode == 0xFFFF) {
                        classCode = classCodeDEL;
                    } else {
                        classCode = SWAPW(lookupTable0->valueArray[gid]);
                    }
                }
                EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses, success));
                LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
                currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex); // return a zero-based index instead of a byte offset
                LE_STATE_PATIENCE_INCR(currGlyph);
            }
#endif
            break;
        }
        case ltfSegmentSingle: {
          LEReferenceTo<SegmentSingleLookupTable> lookupTable2(classTable, success);
          if(LE_FAILURE(success)) break;
            while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
                if (LE_FAILURE(success)) break;
                if (LE_STATE_PATIENCE_DECR()) {
                  LE_DEBUG_BAD_FONT("patience exceeded  - state table not moving")
                  break; // patience exceeded.
                }
                LookupValue classCode = classCodeOOB;
                if (currGlyph == glyphCount || currGlyph == -1) {
                    // XXX: How do we handle EOT vs. EOL?
                    classCode = classCodeEOT;
                } else {
                    LEGlyphID gid = glyphStorage[currGlyph];
                    TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);

                    if (glyphCode == 0xFFFF) {
                        classCode = classCodeDEL;
                    } else {
                      const LookupSegment *segment =
                        lookupTable2->lookupSegment(lookupTable2, lookupTable2->segments, gid, success);
                        if (segment != NULL && LE_SUCCESS(success)) {
                            classCode = SWAPW(segment->value);
                        }
                    }
                }
                EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses,success));
                LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
                currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
                LE_STATE_PATIENCE_INCR(currGlyph);
            }
            break;
        }
        case ltfSegmentArray: {
          //printf("Lookup Table Format4: specific interpretation needed!\n");
            break;
        }
        case ltfSingleTable: {
            LEReferenceTo<SingleTableLookupTable> lookupTable6(classTable, success);
            while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
                if (LE_FAILURE(success)) break;
                if (LE_STATE_PATIENCE_DECR()) {
                  LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
                  break; // patience exceeded.
                }
                LookupValue classCode = classCodeOOB;
                if (currGlyph == glyphCount || currGlyph == -1) {
                    // XXX: How do we handle EOT vs. EOL?
                    classCode = classCodeEOT;
                } else if(currGlyph > glyphCount) {
                  // note if > glyphCount, we've run off the end (bad font)
                  currGlyph = glyphCount;
                  classCode = classCodeEOT;
                } else {
                    LEGlyphID gid = glyphStorage[currGlyph];
                    TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(gid);

                    if (glyphCode == 0xFFFF) {
                        classCode = classCodeDEL;
                    } else {
                      const LookupSingle *segment = lookupTable6->lookupSingle(lookupTable6, lookupTable6->entries, gid, success);
                        if (segment != NULL) {
                            classCode = SWAPW(segment->value);
                        }
                    }
                }
                EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses, success));
                LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
                currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
                LE_STATE_PATIENCE_INCR(currGlyph);
            }
            break;
        }
        case ltfTrimmedArray: {
            LEReferenceTo<TrimmedArrayLookupTable> lookupTable8(classTable, success);
            if (LE_FAILURE(success)) break;
            TTGlyphID firstGlyph = SWAPW(lookupTable8->firstGlyph);
            TTGlyphID lastGlyph  = firstGlyph + SWAPW(lookupTable8->glyphCount);

            while ((dir == 1 && currGlyph <= glyphCount) || (dir == -1 && currGlyph >= -1)) {
                if(LE_STATE_PATIENCE_DECR()) {
                  LE_DEBUG_BAD_FONT("patience exceeded - state table not moving")
                  break; // patience exceeded.
                }

                LookupValue classCode = classCodeOOB;
                if (currGlyph == glyphCount || currGlyph == -1) {
                    // XXX: How do we handle EOT vs. EOL?
                    classCode = classCodeEOT;
                } else {
                    TTGlyphID glyphCode = (TTGlyphID) LE_GET_GLYPH(glyphStorage[currGlyph]);
                    if (glyphCode == 0xFFFF) {
                        classCode = classCodeDEL;
                    } else if ((glyphCode >= firstGlyph) && (glyphCode < lastGlyph)) {
                        classCode = SWAPW(lookupTable8->valueArray[glyphCode - firstGlyph]);
                    }
                }
                EntryTableIndex2 entryTableIndex = SWAPW(stateArray(classCode + currentState * nClasses, success));
                LE_STATE_PATIENCE_CURR(le_int32, currGlyph);
                currentState = processStateEntry(glyphStorage, currGlyph, entryTableIndex, success);
                LE_STATE_PATIENCE_INCR(currGlyph);
            }
            break;
        }
        default:
            break;
    }

    endStateTable();
}

U_NAMESPACE_END