From 3669bc0b90af78cfa8c40a8eb814ef2774fdddfa Mon Sep 17 00:00:00 2001
From: Carl Geib <carl@vadoola.com>
Date: Wed, 17 Jan 2024 10:32:55 +1300
Subject: [PATCH] Initial version of a KSY file for comps.dat

---
 resources/Kaitai Struct/comps.ksy | 134 ++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 resources/Kaitai Struct/comps.ksy

diff --git a/resources/Kaitai Struct/comps.ksy b/resources/Kaitai Struct/comps.ksy
new file mode 100644
index 0000000..4116fe0
--- /dev/null
+++ b/resources/Kaitai Struct/comps.ksy	
@@ -0,0 +1,134 @@
+meta:
+  id: comps_dat
+  title: Comps.dat file extracted from an RSLogix 5000 ACD
+  file-extension: dat
+  license: CC0-1.0
+  ks-version: 0.9
+  endian: le
+  bit-endian: le
+doc: |
+  Docs for Comps.dat of ACD File Format
+doc-ref:
+  - URL Reference?
+seq:
+  - id: magic_number_maybe
+    type: u4
+    repeat: expr
+    repeat-expr: 2
+  - id: header
+    type: header
+  - id: unknown_data_between_header_and_records
+    type: u1
+    repeat: expr
+    repeat-expr: header.region_pointer_offset - 28
+  - id: region_header
+    type: region_header
+  - id: unknown_betw_reghead_and_region
+    type: u1
+    repeat: expr
+    repeat-expr: region_header.pointer_records_region - header.region_pointer_offset - 22
+  - id: record_header
+    type: record_header
+  - id: unknown_between_head_and_rec
+    type: u1
+    repeat: expr
+    repeat-expr: 36 #self.pointer_records_region + self.record_header_length
+  - id: records
+    type: record
+    repeat: expr
+    #repeat-expr: 2 #self.header.no_records + self.header.no_records_table2
+    repeat-expr: header.num_records + header.num_records_table2
+  
+types:
+  header:
+    seq:
+      - id: total_length
+        type: u4
+      - id: region_pointer_offset
+        type: u4
+      - id: header_unknown_1
+        type: u4
+      - id: num_records
+        type: u4
+      - id: num_records_table2
+        type: u4
+  region_header:
+    seq:
+      - id: magic_num
+        contents: [0xfe, 0xfe]
+      - id: region_pointer_length
+        type: u4
+      - id: rec_header_unknown_1
+        type: u4
+      - id: rec_header_unknown_2
+        type: u4
+      - id: pointer_metadata_region
+        type: u4
+      - id: pointer_records_region
+        type: u4
+  record_header:
+    seq:
+      - id: magic_num
+        contents: [0xfe, 0xfe]
+      - id: record_header_length
+        type: u4
+      - id: unknown4
+        type: u4
+      - id: unknown5
+        type: u4
+      - id: record_format
+        type: u4
+        enum: record_format
+    enums:
+      record_format:
+        #there might be other types, but these are the 2 in the python file
+        #and I haven't dug too deep yet in my sample files
+        132: xfer_db
+        512: tag_record_i_presume
+  record:
+    seq:
+      #- id: header
+      #  type: record_header
+      #- id: unknwon_between_head_and_ident
+      #  type: u1
+      #  repeat: expr
+      #  repeat-expr: 36 #self.pointer_records_region + self.record_header_length
+      - id: identifier
+        type: u2
+      - id: length
+        type: u4
+      - id: data
+        type:
+          switch-on: identifier
+          cases:
+            0xFAFA: dat_record
+            0xFDFD: ptr_dat_record
+  dat_record:
+    seq:
+      - id: length
+        type: u4
+      - id: dat_rec_unknown_1
+        type: u4
+      - id: sequence_number
+        type: u2
+      - id: record_type
+        type: u2
+        #enum: ?
+      - id: dat_rec_unknown_2
+        type: u4
+      - id: obj_id
+        type: u4
+      - id: parent_id_offset
+        type: u4
+      - id: rec_text
+        type: str
+        size: 124
+        encoding: UTF-16LE
+      - id: unknown_remaining_rec_data
+        type: u1
+        repeat: expr
+        repeat-expr: length - 144
+  ptr_dat_record:
+    seq:
+      - id: temporary_2
+        type: u1