wip: lib9p: Multi-iovec replieslukeshu/9p-read-multi-iovec

1 files changed, 12 insertions, 1 deletions

diff --git a/lib9p/core_gen/h.py b/lib9p/core_gen/h.py
index 8c381f8..6ead5ba 100644
--- a/lib9p/core_gen/h.py
+++ b/lib9p/core_gen/h.py
@@ -162,6 +162,11 @@ def gen_h(versions: set[str], typs: list[idl.UserType]) -> str:
 #ifndef _LIB9P_CORE_H_
 \t#error Do not include <lib9p/_core_generated.h> directly; include <lib9p/core.h> instead
 #endif
+
+struct {c9util.ident('_iovec_list')} {{
+\tstruct iovec *iov;
+\tint           iovcnt;
+}};
 """
     id2typ: dict[int, idl.Message] = {}
     for msg in [msg for msg in typs if isinstance(msg, idl.Message)]:
@@ -523,7 +528,13 @@ def gen_struct(typ: idl.Struct) -> str:  # and idl.Message
             if member.val:
                 continue
             ret += cutil.ifdef_push(2, c9util.ver_ifdef(member.in_versions))
-            ret += f"\t{c9util.typename(member.typ, member):<{typewidth}}  {'*' if member.cnt else ' '}{member.membname};\n"
+            ptr = bool(member.cnt)
+            if (
+                c9util.typename(member.typ, member)
+                == f"struct {c9util.ident('_iovec')}"
+            ):  # SPECIAL (zerocopy)
+                ptr = False
+            ret += f"\t{c9util.typename(member.typ, member):<{typewidth}}  {'*' if ptr else ' '}{member.membname};\n"
         ret += cutil.ifdef_pop(1)
     ret += "};\n"
     return ret