Allow accessing several numbers.

elm.json

@@ -0,0 +1,25 @@
+{
+    "type": "application",
+    "source-directories": [
+        "src"
+    ],
+    "elm-version": "0.19.0",
+    "dependencies": {
+        "direct": {
+            "elm/browser": "1.0.1",
+            "elm/core": "1.0.2",
+            "elm/html": "1.0.0",
+            "elm/parser": "1.1.0"
+        },
+        "indirect": {
+            "elm/json": "1.1.3",
+            "elm/time": "1.0.0",
+            "elm/url": "1.0.0",
+            "elm/virtual-dom": "1.0.2"
+        }
+    },
+    "test-dependencies": {
+        "direct": {},
+        "indirect": {}
+    }
+}

src/CacheSim/AccessView.elm

@@ -35,6 +35,11 @@ accessViewBack (l, ap) = (l, accessPositionBack (List.length l) ap)
 accessViewDone : AccessView -> Bool
 accessViewDone (_, ap) = accessPositionDone ap
 
+finalCacheHierarchy : CacheHierarchy -> AccessView -> CacheHierarchy
+finalCacheHierarchy ch (l, ap) =
+    List.map .output l ++ List.drop (List.length l) ch
+
+
 effectiveCacheHierarchy : CacheHierarchy -> AccessView -> CacheHierarchy
 effectiveCacheHierarchy c (l, ap) =
     let

src/CacheSim/Model.elm

@@ -6,7 +6,7 @@ import CacheSim.AccessView exposing (..)
 type alias Model =
     { rawHierarchy : RawCacheModelHierarchy
     , hierarchy : Maybe CacheHierarchy
-    , accessView : Maybe AccessView
+    , accessView : Maybe (List AccessView)
     , accessInput : String
     }
 type alias Flags = ()
@@ -15,7 +15,7 @@ type Msg
     | CreateRawModel
     | DeleteRawModel Int
     | UseHierarchy (Maybe CacheModelHierarchy)
-    | Access Int
+    | Access (List Int)
     | ChangeAccessInput String
     | AccessViewForward
     | AccessViewBack

src/CacheSim/Update.elm

@@ -38,11 +38,19 @@ updateUseHierarchy cmh m =
     in
         (newModel, cmd)
 
-updateAccess : Int -> Model -> (Model, Cmd Msg)
-updateAccess i m =
+updateAccess : List Int -> Model -> (Model, Cmd Msg)
+updateAccess li m =
     let
-        accessResult = Maybe.andThen (Result.toMaybe << accessCacheHierarchy i) m.hierarchy
-        newModel = { m | accessView = Maybe.map (\ar -> (ar, Down 0)) accessResult }
+        process c xs =
+            case xs of
+                [] -> Ok []
+                (i::t) ->
+                    case accessCacheHierarchy i c of
+                        Ok av -> Result.map ((::) (av, Down 0)) <| process (finalCacheHierarchy c (av, Done)) t
+                        Err s -> Err s
+
+        accessResult = Maybe.andThen (\h -> Result.toMaybe <| process h li) m.hierarchy
+        newModel = { m | accessView = accessResult }
         cmd = Cmd.none
     in
         (newModel, cmd)
@@ -50,11 +58,11 @@ updateAccess i m =
 updateAccessViewForward : Model -> (Model, Cmd Msg)
 updateAccessViewForward m =
     let
-        afterStep = Maybe.map accessViewForward m.accessView
-        replaceHierarchy avs h = List.map .output avs ++ List.drop (List.length avs) h
+        afterStep = Maybe.map (intMapUpdate 0 accessViewForward) m.accessView
         (newHierarchy, newAccessView) =
             case afterStep of
-                Just (avs, Done) -> (Maybe.map (replaceHierarchy avs) m.hierarchy, Nothing)
+                Just ((avs, Done)::[]) -> (Maybe.map (\h -> finalCacheHierarchy h (avs, Done)) m.hierarchy, Nothing)
+                Just ((avs, Done)::xs) -> (Maybe.map (\h -> finalCacheHierarchy h (avs, Done)) m.hierarchy, Just xs)
                 as_ -> (m.hierarchy, as_)
         newModel = { m | accessView = newAccessView, hierarchy = newHierarchy }
         cmd = Cmd.none
@@ -64,7 +72,7 @@ updateAccessViewForward m =
 updateAccessViewBack : Model -> (Model, Cmd Msg)
 updateAccessViewBack m =
     let
-        afterStep = Maybe.map accessViewBack m.accessView
+        afterStep = Maybe.map (intMapUpdate 0 accessViewBack) m.accessView
         newModel = { m | accessView = afterStep }
         cmd = Cmd.none
     in

src/CacheSim/View.elm

@@ -4,6 +4,7 @@ import CacheSim.Model exposing (..)
 import CacheSim.Cache exposing (..)
 import CacheSim.AccessView exposing (..)
 import CacheSim.Hierarchy exposing (..)
+import Parser exposing ((|.))
 import Html exposing (Html, Attribute, input, text, div, label, span, h2, h3, table, tr, td, th, p, h1)
 import Html.Attributes exposing (type_, class, value, for, classList, disabled, colspan, hidden)
 import Html.Events exposing (onInput, onClick)
@@ -198,13 +199,28 @@ viewAccessLog (aes, ap) =
 viewAccessInput : Model -> Html Msg
 viewAccessInput m =
     let
-        accessButton = maybeButton (String.toInt m.accessInput) "Access address" Access
+        parser =
+            Parser.sequence
+                { start = ""
+                , end = ""
+                , separator = ","
+                , spaces = Parser.spaces
+                , item = Parser.int
+                , trailing = Parser.Optional
+                }
+        parseResult = Parser.run (parser |. Parser.end) m.accessInput
+        accessButton = maybeButton (Result.toMaybe parseResult) "Access address" Access
+        errorHtml =
+            case parseResult of
+                Ok _ -> viewError True ""
+                Err lde -> viewError False "Unable to parse input. Please enter a sequence of numbers separated by commas."
         editHierarchyButton = button "Edit hierarchy" (UseHierarchy Nothing)
     in
         div []
             [ h2 [] [ text "Run access simulation" ]
             , labeledInput "Access address" m.accessInput ChangeAccessInput
             , buttonWrapper [ accessButton, editHierarchyButton ]
+            , errorHtml
             ]
 
 viewDescription : Html Msg
@@ -241,7 +257,7 @@ viewBase m =
                     Maybe.withDefault []
                         <| Maybe.map (List.singleton << viewCacheHierarchy) <| m.hierarchy
                 Just _ -> []
-        accessView = Maybe.withDefault [] <| Maybe.map (List.singleton << viewAccessView m) <| m.accessView
+        accessView = Maybe.withDefault [] <| Maybe.map (List.singleton << viewAccessView m) <| Maybe.andThen (List.head) <| m.accessView
     in
         div [ class "container" ]
             <| [ viewDescription] ++ rawView ++ accessInputView ++ accessView ++ cacheView