Add Portal 2 SAR autosplitter

auto-splitters/Portal_2/portal2_sar.lua

@@ -0,0 +1,112 @@
+--- Portal 2 SAR Autosplitter
+--- By Zach (Phi0)
+--- Based on work done by Nekz, Mlugg, and others in P2SR I'm probably forgetting
+process("portal2_linux")
+
+-- Def for action
+local action_dict = {
+    [0] = "none",
+    [1] = "start",
+    [2] = "restart",
+    [3] = "split",
+    [4] = "end",
+    [5] = "reset"
+};
+
+-- Layout of SAR info we need
+local SAR = {
+    total = nil,
+    ipt = nil,
+    action = nil
+}
+
+-- Mem address for SAR
+local target = nil;
+
+function clear_table(table)
+    for n in pairs(table) do
+        table[n] = nil
+    end
+end
+
+local last_action = 0;
+
+-- Returns true when action memory address is updated in SAR
+function action_changed()
+    if SAR.action ~= last_action then
+        last_action = SAR.action;
+        return true;
+    end
+    return false
+end
+
+-- Update SAR memory values
+function update_sar()
+    local total = readAddress('int', target);
+    local ipt = readAddress('float', target + sizeOf("int"));                    -- sizeOf(int)
+    local action = readAddress('int', target + sizeOf("int") + sizeOf("float")); -- sizeOf(int) + sizeOf(float)
+    -- print(string.format("[SAR]: total: %d, ipt: %f, action: %d", SAR.total, SAR.ipt, SAR.action))
+
+    clear_table(SAR);
+    SAR.total = total;
+    SAR.ipt = ipt;
+    SAR.action = action;
+end
+
+-- Find where SAR is loaded in memory, then load SAR values into local sar variable
+function find_interface()
+    target = sig_scan(
+        "53 41 52 5F 54 49 4D 45 52 5F 53 54 41 52 54 00 ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? 53 41 52 5F 54 49 4D 45 52 5F 45 4E 44 00",
+        -- char start[16]                                int total   float ipt   int action  char end[14]
+        16
+    );
+
+    if target ~= nil then
+        -- print("[SAR]: Public Inferface found at 0x", string.format("%x", target));
+        local total = readAddress('int', target);
+        local ipt = readAddress('float', target + sizeOf("int"));                    -- sizeOf(int)
+        local action = readAddress('int', target + sizeOf("int") + sizeOf("float")); -- sizeOf(int) + sizeOf(float)
+
+        clear_table(SAR);
+        SAR.total = total;
+        SAR.ipt = ipt;
+        SAR.action = action;
+
+        return true;
+    end
+
+    print("[SAR] Memory scan failed");
+    return false;
+end
+
+local init = false;
+
+function startup()
+    refreshRate = 120;
+    useGameTime = true;
+end
+
+function state()
+    if init then
+        update_sar()
+    else
+        init = find_interface()
+    end
+end
+
+function gameTime()
+    -- print(SAR.total * SAR.ipt * 1000)
+    return SAR.total * SAR.ipt * 1000;
+end
+
+function start()
+    return action_changed() and (SAR.action == 1 or SAR.action == 2);
+end
+
+function reset()
+    return action_changed() and SAR.action == 5;
+end
+
+function split()
+    return action_changed() and (SAR.action == 3 or SAR.action == 4);
+end