feat: pattern file for ImHex

dissect.hexpat

@@ -0,0 +1,47 @@
+#pragma endian little
+#pragma pattern_limit 500000
+
+#include <std/sys.pat>
+
+struct HeaderProperty {
+    u8 keyLen [[name("Key Length")]];
+    padding[7];
+    char key[keyLen] [[name("Key")]];
+    u8 valueLen [[name("Value Length")]];
+    padding[7];
+    char value[valueLen] [[name("Value")]];
+};
+
+struct Header {
+    char magic[7] [[name("Magic"), comment("Decompressed Dissect files always start with this sequence.")]];
+    std::assert(magic == "dissect", "Incorrect magic");
+
+    padding[28];
+
+    u8 size [[name("Properties Size"), comment("The number of header properties.")]];
+    padding[7];
+    HeaderProperty properties[size] [[name("Properties")]];
+};
+
+Header header @0x00;
+
+// unknown, contains incrementing numbers
+struct InitTableItem {
+    u24 unknown;
+    u8 unknown2;
+    u8 unknown3;
+    u8 unknown4;
+    u8 unknown5;
+    padding[3];
+    u8 unknown6;
+    u8 unknown7;
+};
+
+struct InitTable {
+    padding[8];
+    u16 size;
+    padding[21];
+    InitTableItem items[size];
+};
+
+InitTable initTable @sizeof(header);