1 files changed, 75 insertions, 0 deletions
diff --git a/src/input/zero.lua b/src/input/zero.lua
new file mode 100644
index 0000000..1907dce
--- /dev/null
+++ b/src/input/zero.lua
@@ -0,0 +1,75 @@
+-- Copyright (c) 2018-2021, OARC, Inc.
+-- All rights reserved.
+--
+-- This file is part of dnsjit.
+--
+-- dnsjit is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- dnsjit is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with dnsjit.  If not, see <http://www.gnu.org/licenses/>.
+
+-- dnsjit.input.zero
+-- Generate empty objects (/dev/zero)
+--   local input = require("dnsjit.input.zero").new()
+--   input:receiver(filter_or_output)
+--   input:run(1e6)
+--
+-- Input module for generating empty
+-- .I core.object.null
+-- objects, mostly used for testing.
+module(...,package.seeall)
+
+require("dnsjit.input.zero_h")
+local ffi = require("ffi")
+local C = ffi.C
+
+local t_name = "input_zero_t"
+local input_zero_t = ffi.typeof(t_name)
+local Zero = {}
+
+-- Create a new Zero input.
+function Zero.new()
+    local self = {
+        _receiver = nil,
+        obj = input_zero_t(),
+    }
+    C.input_zero_init(self.obj)
+    ffi.gc(self.obj, C.input_zero_destroy)
+    return setmetatable(self, { __index = Zero })
+end
+
+-- Return the Log object to control logging of this instance or module.
+function Zero:log()
+    if self == nil then
+        return C.input_zero_log()
+    end
+    return self.obj._log
+end
+
+-- Set the receiver to pass objects to.
+function Zero:receiver(o)
+    self.obj.recv, self.obj.ctx = o:receive()
+    self._receiver = o
+end
+
+-- Return the C functions and context for producing objects.
+function Zero:produce()
+    return C.input_zero_producer(), self.obj
+end
+
+-- Generate
+-- .I num
+-- empty objects and send them to the receiver.
+function Zero:run(num)
+    C.input_zero_run(self.obj, num)
+end
+
+return Zero