writerfilter: fix ubsan complaints about "-42" enum value

Apparently the StyleType enum is specific to the domain-mapper, the
OOXML filter has integer constants in its model.xml file...

Also surprisingly the section styles only exist in RTF; w_ST_StyleType
in "ECMA-376 3rd Edition" only contains the 4 values of StyleType enum.

Change-Id: I5407800f801824676df309b3705e233cf1382721

2 files changed, 25 insertions, 4 deletions

diff --git a/writerfilter/source/dmapper/StyleSheetTable.cxx b/writerfilter/source/dmapper/StyleSheetTable.cxx
index 8f5003784a9d..7c698efb25a1 100644
--- a/writerfilter/source/dmapper/StyleSheetTable.cxx
+++ b/writerfilter/source/dmapper/StyleSheetTable.cxx
@@ -427,7 +427,28 @@ void StyleSheetTable::lcl_attribute(Id Name, Value & val)
         {
             SAL_WARN_IF( m_pImpl->m_pCurrentEntry->nStyleTypeCode != STYLE_TYPE_UNKNOWN,
                 "writerfilter", "Style type needs to be processed first" );
-            StyleType nType = ( StyleType ) nIntValue;
+            StyleType nType(STYLE_TYPE_UNKNOWN);
+            switch (nIntValue)
+            {
+                case 1:
+                    nType = STYLE_TYPE_PARA;
+                    break;
+                case 2:
+                    nType = STYLE_TYPE_CHAR;
+                    break;
+                case 3:
+                    nType = STYLE_TYPE_TABLE;
+                    break;
+                case 4:
+                    nType = STYLE_TYPE_LIST;
+                    break;
+                default:
+                    SAL_WARN("writerfilter", "unknown LN_CT_Style_type " << nType);
+                    //fall-through
+                case 0: // explicit unknown set by tokenizer
+                    break;
+
+            }
             if ( nType == STYLE_TYPE_TABLE )
             {
                 StyleSheetEntryPtr pEntry = m_pImpl->m_pCurrentEntry;
@@ -435,7 +456,7 @@ void StyleSheetTable::lcl_attribute(Id Name, Value & val)
                 m_pImpl->m_pCurrentEntry = pTableEntry;
             }
             else
-                m_pImpl->m_pCurrentEntry->nStyleTypeCode = (StyleType)nIntValue;
+                m_pImpl->m_pCurrentEntry->nStyleTypeCode = nType;
         }
         break;
         case NS_ooxml::LN_CT_Style_default:
diff --git a/writerfilter/source/rtftok/rtfdocumentimpl.cxx b/writerfilter/source/rtftok/rtfdocumentimpl.cxx
index 8ff911a0d230..3bba4c451af9 100644
--- a/writerfilter/source/rtftok/rtfdocumentimpl.cxx
+++ b/writerfilter/source/rtftok/rtfdocumentimpl.cxx
@@ -3647,7 +3647,7 @@ int RTFDocumentImpl::dispatchValue(RTFKeyword nKeyword, int nParam)
         if (m_aStates.top().nDestinationState == DESTINATION_STYLESHEET || m_aStates.top().nDestinationState == DESTINATION_STYLEENTRY)
         {
             m_nCurrentStyleIndex = nParam;
-            RTFValue::Pointer_t pValue(new RTFValue(-42)); // TODO no value in enum StyleType?
+            RTFValue::Pointer_t pValue(new RTFValue(0)); // TODO no value in enum StyleType?
             m_aStates.top().aTableAttributes.set(NS_ooxml::LN_CT_Style_type, pValue); // section style
         }
         break;
@@ -3655,7 +3655,7 @@ int RTFDocumentImpl::dispatchValue(RTFKeyword nKeyword, int nParam)
         if (m_aStates.top().nDestinationState == DESTINATION_STYLESHEET || m_aStates.top().nDestinationState == DESTINATION_STYLEENTRY)
         {
             m_nCurrentStyleIndex = nParam;
-            RTFValue::Pointer_t pValue(new RTFValue(-43)); // FIXME the correct value would be 3 but maybe table styles mess things up in dmapper, be cautious and disable them for now
+            RTFValue::Pointer_t pValue(new RTFValue(0)); // FIXME the correct value would be 3 but maybe table styles mess things up in dmapper, be cautious and disable them for now
             m_aStates.top().aTableAttributes.set(NS_ooxml::LN_CT_Style_type, pValue); // table style
         }
         break;