A version of list-abs' [list-rdrip] in lua

svn path=/trunk/externals/loaders/pdlua/; revision=16128

1 files changed, 39 insertions, 0 deletions

diff --git a/examples/llist-rdrip.pd_lua b/examples/llist-rdrip.pd_lua
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+--[[ 
+  llist-rdrip
+  Output a list as a sequence of elements in reverse order
+  author Martin Peach 20120419
+--]]
+
+-- Pd class
+
+local LlistRdrip = pd.Class:new():register("llist-rdrip")
+local selectormap = {string = "symbol", number="float", userdata="pointer"} -- for lua/Pd type conversion
+
+function LlistRdrip:initialize(name, atoms)
+  self.inlets = 1
+  self.outlets = 1
+  return true
+end
+
+function LlistRdrip:in_1(sel, atoms) -- anything
+  --pd.post("sel is " .. sel);
+  --pd.post("number of atoms is ".. #atoms)
+  --for i,v in ipairs(atoms) do
+  --  pd.post(i .. " = " .. v)
+  --end
+  if sel == "list" then -- the usual case
+    for i = #atoms, 1, -1 do
+      -- map lua types to pd selectors
+      self:outlet(1, selectormap[type(atoms[i])], {atoms[i]})
+    end
+  elseif sel == "float" or sel == "symbol" or sel == "pointer" or sel == "bang" then -- single element "lists"
+    self:outlet(1, sel, {atoms[1]})
+  else -- messages are lists beginning with a selector
+    self:outlet(1, selectormap[type(sel)], {sel})
+    for i = #atoms , 1 , -1 do
+      self:outlet(1, selectormap[type(atoms[i])], {atoms[i]})
+    end
+  end  
+end
+-- end of llist-rdrip
+