ICU-461.12.tar.gz

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

diff --git a/icuSources/layout/LookupProcessor.cpp b/icuSources/layout/LookupProcessor.cpp
index 6f26a13bedb9eb1c94582e479b91ba9d9bc0a388..4d4347cad8f35f1e4045e0260a83df6180521f60 100644 (file)
--- a/icuSources/layout/LookupProcessor.cpp
+++ b/icuSources/layout/LookupProcessor.cpp
@@ -1,6 +1,6 @@
 /*
  *
- * (C) Copyright IBM Corp. 1998-2007 - All Rights Reserved
+ * (C) Copyright IBM Corp. 1998-2010 - All Rights Reserved
  *
  */
 
@@ -8,7 +8,7 @@
 #include "OpenTypeUtilities.h"
 #include "LEFontInstance.h"
 #include "OpenTypeTables.h"
-#include "Features.h"
+#include "ICUFeatures.h"
 #include "Lookups.h"
 #include "ScriptAndLanguage.h"
 #include "GlyphDefinitionTables.h"
@@ -20,8 +20,12 @@
 U_NAMESPACE_BEGIN
 
 le_uint32 LookupProcessor::applyLookupTable(const LookupTable *lookupTable, GlyphIterator *glyphIterator,
-                                         const LEFontInstance *fontInstance) const
+                                         const LEFontInstance *fontInstance, LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) {
+        return 0;
+    }
+
     le_uint16 lookupType = SWAPW(lookupTable->lookupType);
     le_uint16 subtableCount = SWAPW(lookupTable->subTableCount);
     le_int32 startPosition = glyphIterator->getCurrStreamPosition();
@@ -30,9 +34,9 @@ le_uint32 LookupProcessor::applyLookupTable(const LookupTable *lookupTable, Glyp
     for (le_uint16 subtable = 0; subtable < subtableCount; subtable += 1) {
         const LookupSubtable *lookupSubtable = lookupTable->getLookupSubtable(subtable);
 
-        delta = applySubtable(lookupSubtable, lookupType, glyphIterator, fontInstance);
+        delta = applySubtable(lookupSubtable, lookupType, glyphIterator, fontInstance, success);
 
-        if (delta > 0) {
+        if (delta > 0 && LE_FAILURE(success)) {
             return 1;
         }
 
@@ -44,8 +48,12 @@ le_uint32 LookupProcessor::applyLookupTable(const LookupTable *lookupTable, Glyp
 
 le_int32 LookupProcessor::process(LEGlyphStorage &glyphStorage, GlyphPositionAdjustments *glyphPositionAdjustments,
                               le_bool rightToLeft, const GlyphDefinitionTableHeader *glyphDefinitionTableHeader,
-                              const LEFontInstance *fontInstance) const
+                              const LEFontInstance *fontInstance, LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) {
+        return 0;
+    }    
+       
     le_int32 glyphCount = glyphStorage.getGlyphCount();
 
     if (lookupSelectArray == NULL) {
@@ -67,7 +75,10 @@ le_int32 LookupProcessor::process(LEGlyphStorage &glyphStorage, GlyphPositionAdj
             glyphIterator.reset(lookupFlags, selectMask);
 
             while (glyphIterator.findFeatureTag()) {
-                applyLookupTable(lookupTable, &glyphIterator, fontInstance);
+                applyLookupTable(lookupTable, &glyphIterator, fontInstance, success);
+                if (LE_FAILURE(success)) { 
+                    return 0;
+                }
             }
 
             newGlyphCount = glyphIterator.applyInsertions();
@@ -78,12 +89,16 @@ le_int32 LookupProcessor::process(LEGlyphStorage &glyphStorage, GlyphPositionAdj
 }
 
 le_uint32 LookupProcessor::applySingleLookup(le_uint16 lookupTableIndex, GlyphIterator *glyphIterator,
-                                          const LEFontInstance *fontInstance) const
+                                          const LEFontInstance *fontInstance, LEErrorCode& success) const
 {
+    if (LE_FAILURE(success)) {
+        return 0;
+    }    
+
     const LookupTable *lookupTable = lookupListTable->getLookupTable(lookupTableIndex);
     le_uint16 lookupFlags = SWAPW(lookupTable->lookupFlags);
     GlyphIterator tempIterator(*glyphIterator, lookupFlags);
-    le_uint32 delta = applyLookupTable(lookupTable, &tempIterator, fontInstance);
+    le_uint32 delta = applyLookupTable(lookupTable, &tempIterator, fontInstance, success);
 
     return delta;
 }
@@ -105,7 +120,8 @@ le_int32 LookupProcessor::selectLookups(const FeatureTable *featureTable, Featur
 
 LookupProcessor::LookupProcessor(const char *baseAddress,
         Offset scriptListOffset, Offset featureListOffset, Offset lookupListOffset,
-        LETag scriptTag, LETag languageTag, const FeatureMap *featureMap, le_int32 featureMapCount, le_bool orderFeatures)
+        LETag scriptTag, LETag languageTag, const FeatureMap *featureMap, le_int32 featureMapCount, le_bool orderFeatures, 
+        LEErrorCode& success)
     : lookupListTable(NULL), featureListTable(NULL), lookupSelectArray(NULL),
       lookupOrderArray(NULL), lookupOrderCount(0)
 {
@@ -115,6 +131,10 @@ LookupProcessor::LookupProcessor(const char *baseAddress,
     le_uint16 lookupListCount = 0;
     le_uint16 requiredFeatureIndex;
 
+    if (LE_FAILURE(success)) {
+        return;
+    } 
+
     if (scriptListOffset != 0) {
         scriptListTable = (const ScriptListTable *) (baseAddress + scriptListOffset);
         langSysTable = scriptListTable->findLanguage(scriptTag, languageTag);
@@ -141,6 +161,10 @@ LookupProcessor::LookupProcessor(const char *baseAddress,
     requiredFeatureIndex = SWAPW(langSysTable->reqFeatureIndex);
 
     lookupSelectArray = LE_NEW_ARRAY(FeatureMask, lookupListCount);
+    if (lookupSelectArray == NULL) {
+        success = LE_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
 
     for (int i = 0; i < lookupListCount; i += 1) {
         lookupSelectArray[i] = 0;
@@ -171,6 +195,10 @@ LookupProcessor::LookupProcessor(const char *baseAddress,
     }
 
     lookupOrderArray = LE_NEW_ARRAY(le_uint16, featureReferences);
+    if (lookupOrderArray == NULL) {
+        success = LE_MEMORY_ALLOCATION_ERROR;
+        return;
+    }
 
     for (le_int32 f = 0; f < featureMapCount; f += 1) {
         FeatureMap fm = featureMap[f];
@@ -260,6 +288,8 @@ LookupProcessor::LookupProcessor(const char *baseAddress,
 
 LookupProcessor::LookupProcessor()
 {
+       lookupOrderArray = NULL;
+       lookupSelectArray = NULL;
 }
 
 LookupProcessor::~LookupProcessor()