1 files changed, 25 insertions, 0 deletions
diff --git a/codegen/lib/utils.py b/codegen/lib/utils.py
index 051ffe51..ff1a5d36 100644
--- a/codegen/lib/utils.py
+++ b/codegen/lib/utils.py
@@ -1,5 +1,7 @@
 import re
 
+# utilities that could be used for things other than codegen
+
 
 def to_snake_case(name: str):
     s = re.sub('([A-Z])', r'_\1', name)
@@ -13,3 +15,26 @@ def to_camel_case(name: str):
 
 def padded_hex(n: int):
     return f'0x{n:02x}'
+
+
+class PacketIdentifier:
+    def __init__(self, packet_id, direction, state):
+        self.packet_id = packet_id
+        self.direction = direction
+        self.state = state
+
+    def __eq__(self, other):
+        return self.packet_id == other.packet_id and self.direction == other.direction and self.state == other.state
+
+    def __hash__(self):
+        return hash((self.packet_id, self.direction, self.state))
+
+
+def group_packets(packets: list[PacketIdentifier]):
+    packet_groups: dict[tuple[str, str], list[int]] = {}
+    for packet in packets:
+        key = (packet.direction, packet.state)
+        if key not in packet_groups:
+            packet_groups[key] = []
+        packet_groups[key].append(packet.packet_id)
+    return packet_groups