Add a tagged union for all backend messages.

Move read_message to proto.zig and make it return the tagged union
rather than expecting a message type.

1 files changed, 5 insertions, 1 deletions

diff --git a/src/proto/authentication_request.zig b/src/proto/authentication_request.zig
index 9203482..3ea5cd1 100644
--- a/src/proto/authentication_request.zig
+++ b/src/proto/authentication_request.zig
@@ -30,7 +30,11 @@ pub fn read(_: std.mem.Allocator, b: []const u8) !AuthenticationRequest {
         log.err("invalid message length, expected 4 got {}", .{b.len});
         return ProtocolError.InvalidMessageLength;
     }
-    const inner_type = enum_from_int(InnerAuthRequestType, std.mem.readIntBig(u32, b[0..4])) orelse return ClientError.UnsupportedAuthType;
+    const auth_type_int = std.mem.readIntBig(u32, b[0..4]);
+    const inner_type = enum_from_int(InnerAuthRequestType, auth_type_int) orelse {
+        log.err("Unsupported auth type {}", .{auth_type_int});
+        return ClientError.UnsupportedAuthType;
+    };
     var inner: InnerAuthRequest = switch (inner_type) {
         .AuthRequestTypeOk => .{ .ok = AuthRequestOk{} },
         .AuthRequestTypeCleartextPassword => .{ .cleartext_password = AuthRequestCleartextPassword{} },