Ignore extraneous LTSpice parameters for VDMOS models.

Also adds special case handling of VDMOS syntax to allow parens (or extra
spaces, linebreaks, etc.) between "VDMOS" and "NCHAN"/"PCHAN".

Fixes https://gitlab.com/kicad/code/kicad/issues/14299

eeschema/sim/sim_model_ngspice.cpp

@@ -210,6 +210,17 @@ bool SIM_MODEL_NGSPICE::canSilentlyIgnoreParam( const std::string& aParamName )
         }
     }
 
+    if( GetType() == TYPE::NMOS_VDMOS || GetType() == TYPE::PMOS_VDMOS )
+    {
+        // Ignore the purely informative LTspice-specific parameters "Vds", "Ron" and "Qg".
+        if( aParamName == "vds"
+            || aParamName == "ron"
+            || aParamName == "qg" )
+        {
+            return true;
+        }
+    }
+
     return false;
 }
 

eeschema/sim/spice_model_parser.cpp

@@ -277,12 +277,32 @@ SIM_MODEL::TYPE SPICE_MODEL_PARSER::ReadTypeFromSpiceStrings( const std::string&
         if( typePrefix == "" )
             continue;
 
-        // Check if `aTypeString` starts with `typePrefix`.
+        if( boost::starts_with( typePrefix, "VDMOS" ) )
-        if( boost::starts_with( boost::to_upper_copy( aTypeString ), typePrefix )
-            && ( level == readLevel || ( !aSkipDefaultLevel && isDefaultLevel && aLevel == "" ) )
-            && version == aVersion )
         {
-            return type;
+            wxString deviceType = wxString( typePrefix ).BeforeFirst( ' ' );   // VDMOS
+            wxString channelType = wxString( typePrefix ).AfterFirst( ' ' );   // NCHAN or PCHAN
+
+            wxStringTokenizer tokenizer( aTypeString, wxT( " \t\n\r+(" ), wxTOKEN_STRTOK );
+
+            if( tokenizer.HasMoreTokens() && tokenizer.GetNextToken().Upper() == deviceType
+                && tokenizer.HasMoreTokens() && tokenizer.GetNextToken().Upper() == channelType )
+            {
+                return type;
+            }
+        }
+        else if( boost::starts_with( boost::to_upper_copy( aTypeString ), typePrefix ) )
+        {
+            if( version != aVersion )
+                continue;
+
+            if( level == readLevel )
+                return type;
+
+            if( aSkipDefaultLevel )
+                continue;
+
+            if( isDefaultLevel && aLevel == "" )
+                return type;
         }
     }