Implement generated packet wire codecs (#47)

tools/generate_rust_mapping.py

@@ -985,6 +985,7 @@ def validate_generated_shims() -> None:
                     "crate::json_codec::",
                     "crate::notation::",
                     "crate::packet_catalog::",
+                    "crate::packet_wire::",
                     "crate::protobuf::",
                     "crate::xml_codec::",
                 )
@@ -1156,9 +1157,8 @@ def method_receiver(owner: dict, item: dict) -> tuple[str, str]:
         return "&self", "shared_self"
     if owner["doc_id"] == "T:LibreMetaverse.BitPack" and item["name"].startswith(("Pack", "Unpack")):
         return "&mut self", "mutable_self"
-    if (
-        owner["doc_id"] == "T:LibreMetaverse.Packets.InventoryDescendentsPacket"
-        and item["name"].startswith("FromBytes")
+    if owner["doc_id"].startswith("T:LibreMetaverse.Packets.") and item["name"].startswith(
+        "FromBytes"
     ):
         return "&mut self", "mutable_self"
     observers = ("Get", "TryGet", "Find", "Contains", "Has", "Is", "Can", "To", "Equals", "Compare")
@@ -1215,6 +1215,17 @@ def member_signature(mapper: Mapper, owner: dict, item: dict, rust_name: str) ->
         return signature, ownership, "sync", "Result<_, crate::Error>", "method"
     generics = generic_names(item, owner)
     mapped_parameters = [map_parameter(mapper, parameter, generics) for parameter in item.get("parameters", [])]
+    packet_owner = owner["doc_id"].startswith("T:LibreMetaverse.Packets.")
+    if (
+        packet_owner
+        and item["name"] == "FromBytes"
+        and len(mapped_parameters) == 4
+        and item["doc_id"].endswith(",System.Byte[])")
+    ):
+        mapped_parameters[3] = ("optional_mutable_borrow", "zero_buffer: Option<&mut [u8]>")
+    if packet_owner and item["name"] in {"AcksToBytes", "ToBytes"} and mapped_parameters:
+        if owner["doc_id"] == "T:LibreMetaverse.Packets.Header" or owner["doc_id"].endswith("Block"):
+            mapped_parameters[0] = ("mutable_borrow", "bytes: &mut [u8]")
     own = [value[0] for value in mapped_parameters]
     parameters = ", ".join(value[1] for value in mapped_parameters)
     kind = item["kind"]