ICU-531.48.tar.gz

[apple/icu.git] / icuSources / layout / ContextualSubstSubtables.cpp

diff --git a/icuSources/layout/ContextualSubstSubtables.cpp b/icuSources/layout/ContextualSubstSubtables.cpp
index a1541b9fdd352cc4b4e2f2f29424b01480b66451..1737d8e9225ab46634fef0e5f4ae327e00ccab33 100644 (file)
--- a/icuSources/layout/ContextualSubstSubtables.cpp
+++ b/icuSources/layout/ContextualSubstSubtables.cpp
@@ -1,6 +1,5 @@
 /*
- *
- * (C) Copyright IBM Corp. 1998-2004 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2013 - All Rights Reserved
  *
  */
 
@@ -28,18 +27,23 @@ void ContextualSubstitutionBase::applySubstitutionLookups(
         le_uint16 substCount,
         GlyphIterator *glyphIterator,
         const LEFontInstance *fontInstance,
-        le_int32 position)
+        le_int32 position,
+        LEErrorCode& success)
 {
+    if (LE_FAILURE(success)) { 
+        return;
+    }
+
     GlyphIterator tempIterator(*glyphIterator);
 
-    for (le_int16 subst = 0; subst < substCount; subst += 1) {
+    for (le_int16 subst = 0; subst < substCount && LE_SUCCESS(success); subst += 1) {
         le_uint16 sequenceIndex = SWAPW(substLookupRecordArray[subst].sequenceIndex);
         le_uint16 lookupListIndex = SWAPW(substLookupRecordArray[subst].lookupListIndex);
 
         tempIterator.setCurrStreamPosition(position);
         tempIterator.next(sequenceIndex);
 
-        lookupProcessor->applySingleLookup(lookupListIndex, &tempIterator, fontInstance);
+        lookupProcessor->applySingleLookup(lookupListIndex, &tempIterator, fontInstance, success);
     }
 }
 
@@ -141,9 +145,15 @@ le_bool ContextualSubstitutionBase::matchGlyphCoverages(const Offset *coverageTa
     return TRUE;
 }
 
-le_uint32 ContextualSubstitutionSubtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                               const LEFontInstance *fontInstance) const
+le_uint32 ContextualSubstitutionSubtable::process(const LookupProcessor *lookupProcessor, 
+                                                  GlyphIterator *glyphIterator,
+                                                  const LEFontInstance *fontInstance,
+                                                  LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     switch(SWAPW(subtableFormat))
     {
     case 0:
@@ -152,22 +162,19 @@ le_uint32 ContextualSubstitutionSubtable::process(const LookupProcessor *lookupP
     case 1:
     {
         const ContextualSubstitutionFormat1Subtable *subtable = (const ContextualSubstitutionFormat1Subtable *) this;
-
-        return subtable->process(lookupProcessor, glyphIterator, fontInstance);
+        return subtable->process(lookupProcessor, glyphIterator, fontInstance, success);
     }
 
     case 2:
     {
         const ContextualSubstitutionFormat2Subtable *subtable = (const ContextualSubstitutionFormat2Subtable *) this;
-
-        return subtable->process(lookupProcessor, glyphIterator, fontInstance);
+        return subtable->process(lookupProcessor, glyphIterator, fontInstance, success);
     }
 
     case 3:
     {
         const ContextualSubstitutionFormat3Subtable *subtable = (const ContextualSubstitutionFormat3Subtable *) this;
-
-        return subtable->process(lookupProcessor, glyphIterator, fontInstance);
+        return subtable->process(lookupProcessor, glyphIterator, fontInstance, success);
     }
 
     default:
@@ -175,11 +182,17 @@ le_uint32 ContextualSubstitutionSubtable::process(const LookupProcessor *lookupP
     }
 }
 
-le_uint32 ContextualSubstitutionFormat1Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                      const LEFontInstance *fontInstance) const
+le_uint32 ContextualSubstitutionFormat1Subtable::process(const LookupProcessor *lookupProcessor, 
+                                                         GlyphIterator *glyphIterator,
+                                                         const LEFontInstance *fontInstance,
+                                                         LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     LEGlyphID glyph = glyphIterator->getCurrGlyphID();
-    le_int32 coverageIndex = getGlyphCoverage(glyph);
+    le_int32 coverageIndex = getGlyphCoverage(lookupProcessor->getReference(), glyph, success);
 
     if (coverageIndex >= 0) {
         le_uint16 srSetCount = SWAPW(subRuleSetCount);
@@ -203,7 +216,7 @@ le_uint32 ContextualSubstitutionFormat1Subtable::process(const LookupProcessor *
                     const SubstitutionLookupRecord *substLookupRecordArray = 
                         (const SubstitutionLookupRecord *) &subRuleTable->inputGlyphArray[matchCount];
 
-                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position);
+                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
 
                     return matchCount + 1;
                 }
@@ -218,11 +231,17 @@ le_uint32 ContextualSubstitutionFormat1Subtable::process(const LookupProcessor *
     return 0;
 }
 
-le_uint32 ContextualSubstitutionFormat2Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                      const LEFontInstance *fontInstance) const
+le_uint32 ContextualSubstitutionFormat2Subtable::process(const LookupProcessor *lookupProcessor, 
+                                                         GlyphIterator *glyphIterator,
+                                                         const LEFontInstance *fontInstance,
+                                                         LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     LEGlyphID glyph = glyphIterator->getCurrGlyphID();
-    le_int32 coverageIndex = getGlyphCoverage(glyph);
+    le_int32 coverageIndex = getGlyphCoverage(lookupProcessor->getReference(), glyph, success);
 
     if (coverageIndex >= 0) {
         const ClassDefinitionTable *classDefinitionTable =
@@ -249,7 +268,7 @@ le_uint32 ContextualSubstitutionFormat2Subtable::process(const LookupProcessor *
                     const SubstitutionLookupRecord *substLookupRecordArray = 
                         (const SubstitutionLookupRecord *) &subClassRuleTable->classArray[matchCount];
 
-                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position);
+                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
 
                     return matchCount + 1;
                 }
@@ -264,9 +283,15 @@ le_uint32 ContextualSubstitutionFormat2Subtable::process(const LookupProcessor *
     return 0;
 }
 
-le_uint32 ContextualSubstitutionFormat3Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                      const LEFontInstance *fontInstance)const 
+le_uint32 ContextualSubstitutionFormat3Subtable::process(const LookupProcessor *lookupProcessor, 
+                                                         GlyphIterator *glyphIterator,
+                                                         const LEFontInstance *fontInstance,
+                                                         LEErrorCode& success)const 
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     le_uint16 gCount = SWAPW(glyphCount);
     le_uint16 subCount = SWAPW(substCount);
     le_int32 position = glyphIterator->getCurrStreamPosition();
@@ -281,7 +306,7 @@ le_uint32 ContextualSubstitutionFormat3Subtable::process(const LookupProcessor *
         const SubstitutionLookupRecord *substLookupRecordArray = 
             (const SubstitutionLookupRecord *) &coverageTableOffsetArray[gCount];
 
-        ContextualSubstitutionBase::applySubstitutionLookups(lookupProcessor, substLookupRecordArray, subCount, glyphIterator, fontInstance, position);
+        ContextualSubstitutionBase::applySubstitutionLookups(lookupProcessor, substLookupRecordArray, subCount, glyphIterator, fontInstance, position, success);
 
         return gCount + 1;
     }
@@ -291,9 +316,15 @@ le_uint32 ContextualSubstitutionFormat3Subtable::process(const LookupProcessor *
     return 0;
 }
 
-le_uint32 ChainingContextualSubstitutionSubtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                       const LEFontInstance *fontInstance) const
+le_uint32 ChainingContextualSubstitutionSubtable::process(const LookupProcessor *lookupProcessor, 
+                                                          GlyphIterator *glyphIterator,
+                                                          const LEFontInstance *fontInstance,
+                                                          LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     switch(SWAPW(subtableFormat))
     {
     case 0:
@@ -302,22 +333,19 @@ le_uint32 ChainingContextualSubstitutionSubtable::process(const LookupProcessor
     case 1:
     {
         const ChainingContextualSubstitutionFormat1Subtable *subtable = (const ChainingContextualSubstitutionFormat1Subtable *) this;
-
-        return subtable->process(lookupProcessor, glyphIterator, fontInstance);
+        return subtable->process(lookupProcessor, glyphIterator, fontInstance, success);
     }
 
     case 2:
     {
         const ChainingContextualSubstitutionFormat2Subtable *subtable = (const ChainingContextualSubstitutionFormat2Subtable *) this;
-
-        return subtable->process(lookupProcessor, glyphIterator, fontInstance);
+        return subtable->process(lookupProcessor, glyphIterator, fontInstance, success);
     }
 
     case 3:
     {
         const ChainingContextualSubstitutionFormat3Subtable *subtable = (const ChainingContextualSubstitutionFormat3Subtable *) this;
-
-        return subtable->process(lookupProcessor, glyphIterator, fontInstance);
+        return subtable->process(lookupProcessor, glyphIterator, fontInstance, success);
     }
 
     default:
@@ -325,13 +353,23 @@ le_uint32 ChainingContextualSubstitutionSubtable::process(const LookupProcessor
     }
 }
 
-static const LETag emptyTag = 0;
+// NOTE: This could be a #define, but that seems to confuse
+// the Visual Studio .NET 2003 compiler on the calls to the
+// GlyphIterator constructor. It somehow can't decide if
+// emptyFeatureList matches an le_uint32 or an le_uint16...
+static const FeatureMask emptyFeatureList = 0x00000000UL;
 
-le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                              const LEFontInstance *fontInstance) const
+le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LookupProcessor *lookupProcessor, 
+                                                                 GlyphIterator *glyphIterator,
+                                                                 const LEFontInstance *fontInstance,
+                                                                 LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     LEGlyphID glyph = glyphIterator->getCurrGlyphID();
-    le_int32 coverageIndex = getGlyphCoverage(glyph);
+    le_int32 coverageIndex = getGlyphCoverage(lookupProcessor->getReference(), glyph, success);
 
     if (coverageIndex >= 0) {
         le_uint16 srSetCount = SWAPW(chainSubRuleSetCount);
@@ -342,7 +380,7 @@ le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LookupPro
                 (const ChainSubRuleSetTable *) ((char *) this + chainSubRuleSetTableOffset);
             le_uint16 chainSubRuleCount = SWAPW(chainSubRuleSetTable->chainSubRuleCount);
             le_int32 position = glyphIterator->getCurrStreamPosition();
-            GlyphIterator tempIterator(*glyphIterator, emptyTag);
+            GlyphIterator tempIterator(*glyphIterator, emptyFeatureList);
 
             for (le_uint16 subRule = 0; subRule < chainSubRuleCount; subRule += 1) {
                 Offset chainSubRuleTableOffset =
@@ -377,7 +415,7 @@ le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LookupPro
                     const SubstitutionLookupRecord *substLookupRecordArray = 
                         (const SubstitutionLookupRecord *) &lookaheadGlyphArray[lookaheadGlyphCount + 1];
 
-                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position);
+                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
 
                     return inputGlyphCount + 1;
                 }
@@ -392,11 +430,17 @@ le_uint32 ChainingContextualSubstitutionFormat1Subtable::process(const LookupPro
     return 0;
 }
 
-le_uint32 ChainingContextualSubstitutionFormat2Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                              const LEFontInstance *fontInstance) const
+le_uint32 ChainingContextualSubstitutionFormat2Subtable::process(const LookupProcessor *lookupProcessor, 
+                                                                 GlyphIterator *glyphIterator,
+                                                                 const LEFontInstance *fontInstance,
+                                                                 LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     LEGlyphID glyph = glyphIterator->getCurrGlyphID();
-    le_int32 coverageIndex = getGlyphCoverage(glyph);
+    le_int32 coverageIndex = getGlyphCoverage(lookupProcessor->getReference(), glyph, success);
 
     if (coverageIndex >= 0) {
         const ClassDefinitionTable *backtrackClassDefinitionTable =
@@ -414,7 +458,7 @@ le_uint32 ChainingContextualSubstitutionFormat2Subtable::process(const LookupPro
                 (const ChainSubClassSetTable *) ((char *) this + chainSubClassSetTableOffset);
             le_uint16 chainSubClassRuleCount = SWAPW(chainSubClassSetTable->chainSubClassRuleCount);
             le_int32 position = glyphIterator->getCurrStreamPosition();
-            GlyphIterator tempIterator(*glyphIterator, emptyTag);
+            GlyphIterator tempIterator(*glyphIterator, emptyFeatureList);
 
             for (le_uint16 scRule = 0; scRule < chainSubClassRuleCount; scRule += 1) {
                 Offset chainSubClassRuleTableOffset =
@@ -451,7 +495,7 @@ le_uint32 ChainingContextualSubstitutionFormat2Subtable::process(const LookupPro
                     const SubstitutionLookupRecord *substLookupRecordArray = 
                         (const SubstitutionLookupRecord *) &lookaheadClassArray[lookaheadGlyphCount + 1];
 
-                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position);
+                    applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
 
                     return inputGlyphCount + 1;
                 }
@@ -466,9 +510,15 @@ le_uint32 ChainingContextualSubstitutionFormat2Subtable::process(const LookupPro
     return 0;
 }
 
-le_uint32 ChainingContextualSubstitutionFormat3Subtable::process(const LookupProcessor *lookupProcessor, GlyphIterator *glyphIterator,
-                                                              const LEFontInstance *fontInstance) const
+le_uint32 ChainingContextualSubstitutionFormat3Subtable::process(const LookupProcessor *lookupProcessor, 
+                                                                 GlyphIterator *glyphIterator,
+                                                                 const LEFontInstance *fontInstance,
+                                                                 LEErrorCode & success) const
 {
+    if (LE_FAILURE(success)) { 
+        return 0;
+    }
+
     le_uint16 backtrkGlyphCount = SWAPW(backtrackGlyphCount);
     le_uint16 inputGlyphCount = (le_uint16) SWAPW(backtrackCoverageTableOffsetArray[backtrkGlyphCount]);
     const Offset *inputCoverageTableOffsetArray = &backtrackCoverageTableOffsetArray[backtrkGlyphCount + 1];
@@ -476,7 +526,7 @@ le_uint32 ChainingContextualSubstitutionFormat3Subtable::process(const LookupPro
     const Offset *lookaheadCoverageTableOffsetArray = &inputCoverageTableOffsetArray[inputGlyphCount + 1];
     le_uint16 substCount = (le_uint16) SWAPW(lookaheadCoverageTableOffsetArray[lookaheadGlyphCount]);
     le_int32 position = glyphIterator->getCurrStreamPosition();
-    GlyphIterator tempIterator(*glyphIterator, emptyTag);
+    GlyphIterator tempIterator(*glyphIterator, emptyFeatureList);
 
     if (! tempIterator.prev(backtrkGlyphCount)) {
         return 0;
@@ -506,7 +556,7 @@ le_uint32 ChainingContextualSubstitutionFormat3Subtable::process(const LookupPro
         const SubstitutionLookupRecord *substLookupRecordArray = 
             (const SubstitutionLookupRecord *) &lookaheadCoverageTableOffsetArray[lookaheadGlyphCount + 1];
 
-        ContextualSubstitutionBase::applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position);
+        ContextualSubstitutionBase::applySubstitutionLookups(lookupProcessor, substLookupRecordArray, substCount, glyphIterator, fontInstance, position, success);
 
         return inputGlyphCount;
     }