AlwaysSameScanner

reader/src/main/java/com/rusefi/can/analysis/ByteRateOfChange.java

@@ -135,6 +135,10 @@ public boolean equals(Object o) {
             return sid == byteId.sid && byteIndex == byteId.byteIndex;
         }
 
+        public int getSid() {
+            return sid;
+        }
+
         public int getByteIndex() {
             return byteIndex;
         }

reader/src/test/java/com/rusefi/can/AlwaysSameScanner.java

@@ -0,0 +1,78 @@
+package com.rusefi.can;
+
+import com.rusefi.can.analysis.ByteRateOfChange;
+import com.rusefi.can.analysis.CanMetaDataContext;
+import com.rusefi.can.reader.CANLineReader;
+import com.rusefi.can.reader.dbc.DbcFile;
+import com.rusefi.can.reader.dbc.DbcPacket;
+import com.rusefi.util.FolderUtil;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+
+public class AlwaysSameScanner {
+
+    static Map<ByteRateOfChange.ByteId, Integer> existingValue = new TreeMap<>();
+
+    public static void run(String inputFolderName, DbcFile dbc) throws IOException {
+        File inputFolder = new File(inputFolderName);
+        for (String simpleFileName : inputFolder.list()) {
+            String fullInputFile = inputFolderName + File.separator + simpleFileName;
+            if (new File(fullInputFile).isDirectory()) {
+                System.out.println("Recursion " + fullInputFile);
+                run(fullInputFile, dbc);
+            }
+        }
+
+
+        FolderUtil.handleFolder(inputFolderName, (simpleFileName, fullInputFileName) -> {
+            System.out.println("File " + simpleFileName + " " + fullInputFileName);
+
+            List<CANPacket> logFileContent = CANLineReader.getReader().readFile(fullInputFileName);
+
+            for (CANPacket packet : logFileContent) {
+
+                for (int i = 0; i < packet.getData().length; i++) {
+                    ByteRateOfChange.ByteId id = new ByteRateOfChange.ByteId(packet.getId(), i);
+
+                    int currentValue = packet.getData()[i];
+                    Integer existing = existingValue.putIfAbsent(id, currentValue);
+                    if (existing == null) {
+                        // first time we are hitting this byte
+                        continue;
+                    } else if (existing == currentValue) {
+                        // same value, still unit
+                        continue;
+                    } else {
+                        existingValue.put(id, Integer.MAX_VALUE);
+                    }
+                }
+            }
+        }, Launcher.fileNameSuffixValue);
+    }
+
+    public static void report(DbcFile dbc) {
+
+        for (Map.Entry<ByteRateOfChange.ByteId, Integer> e : existingValue.entrySet()) {
+
+            Integer value = e.getValue();
+            if (value == Integer.MAX_VALUE) {
+                // not unique byte
+                continue;
+            }
+
+            int sid = e.getKey().getSid();
+            DbcPacket packet = dbc.findPacket(sid);
+            String name = packet == null ? Integer.toString(sid) : packet.getName();
+
+
+            System.out.println(name + " index " + e.getKey().getByteIndex() + " is always same " + value);
+
+
+        }
+
+    }
+}