Added reactions to some specific strings.

tigersay.tig

@@ -9,6 +9,8 @@ let
     var INDENT   := "        "
     var MAXWIDTH := 40
 
+    var VERSION  := "1.1.0 (02/12/2017)"
+
     /* The cow is unused, and taken directly from the cowsay program. */
     var COW := "\
 \\\   ^__^                 \n\
@@ -31,6 +33,10 @@ let
 \              __/   /_..-' `  ),'  //               \n\
 \             ((__.-'((___..-'' \\__.'                "
 
+    var VERSION_STRING := concat("I am Tigersay, version ",concat(VERSION,"."))
+    var HELP_STRING := concat("I am Tigersay, version ",concat(VERSION,". Fear my claws and dopy face. I was made by Jon Michael Aanes (aanes.xyz). I do not like command-line options. Instead, please feed me by pipe."))
+
+    var ASLAN_QUOTE := "Laugh and fear not, creatures. Now that you are no longer dumb and witless, you need not always be grave. For jokes as well as justice come in with speech.        -- Aslan, The Chronicles of Narnia"
 
     /***********/
     /* Utility */
@@ -49,6 +55,9 @@ let
 
     /* Number / Maths */
 
+    function min (a:int, b:int) : int =
+      if a < b then a else b
+
     function max (a:int, b:int) : int =
       if a > b then a else b
 
@@ -97,7 +106,8 @@ let
 
     function substring_absolute (text:string, i1:int, i2:int) : string =
       /* Uses absolute coordinates to determine substring */
-      substring(text, i1, i2 - i1 + 1)
+      if i2 < i1 then  ""
+                 else  substring(text, i1, i2 - i1 + 1)
 
     function count_substring_occurances (text:string, char:string) : int =
       let var count := 0
@@ -108,6 +118,21 @@ let
        ; count
       end
 
+    function strip (text:string) : string =
+      let var start_i := -1
+          var stop_i  := 0
+          var char    := ""
+      in for i := 0 to size(text) - 1 do
+          ( char := substring(text, i, 1)
+          ; if not(is_whitespace(char)) & start_i = -1 then
+                start_i := i
+          ; if not(is_whitespace(char)) then
+                stop_i  := i )
+        ; if start_i = -1
+          then ""
+          else substring_absolute(text, start_i, stop_i)
+      end
+
     function repeat_string (str:string, rep:int) : string =
       let var out := ""
       in for i := 1 to rep do
@@ -161,11 +186,11 @@ let
       then  0
       else  1 + ll_length(ll.next)
 
-    /**/
+    /* String operations using linked lists */
 
     function split_words (text:string) : stringll =
       let var out := ll_new()
-          var prev_word_start_i := -1
+          var prev_word_start_i := 0
           var char := ""
       in for i := 0 to size(text) - 1 do
           ( char := substring(text, i, 1)
@@ -175,6 +200,7 @@ let
             then prev_word_start_i := i
           ; if is_whitespace(char) then  prev_word_start_i := -1
           )
+        ; ll_append(out, substring_absolute(text, prev_word_start_i, size(text) - 1))
         ; out
       end
 
@@ -198,6 +224,46 @@ let
                  else splitstr )
       end
 
+    /* Fun stuff */
+
+    type map = { key: string, value: string, next: map }
+    type string_option = { some: string }
+
+    function map_lookup ( map : map, key : string ) : string_option =
+      ( while map <> nil & key <> map.key do
+            map := map.next
+      ; if map = nil then  nil
+                     else  string_option { some = map.value } )
+
+    var REACTIONS :=
+      map { key = "",        value = "Quiet type. Has the cat got your tongue?",    next =
+      map { key = "aslan",   value = ASLAN_QUOTE,    next =
+      map { key = "Aslan",   value = ASLAN_QUOTE,    next =
+      map { key = "version", value = VERSION_STRING, next =
+      map { key = "help",    value = HELP_STRING,    next =
+
+      nil }}}}}
+
+    function is_moo (input : string) : string_option =
+      if size(input) <> 0
+       & (substring(input, 0, 1) = "M" | substring(input, 0, 1) = "m")
+       & count_substring_occurances(input, "o") = size(input) - 1 then
+           string_option {
+               some = concat( if "m" = substring(input, 0, 1) then "g" else "G"
+                            , repeat_string("r", count_substring_occurances(input, "o"))) }
+      else
+         nil
+
+    function get_reaction_or_text (input: string): string =
+      let var maybe_string := map_lookup(REACTIONS, input)
+          var maybe_moo    := is_moo(input)
+      in if maybe_string <> nil
+         then maybe_string.some
+         else if maybe_moo <> nil
+              then maybe_moo.some
+              else input
+      end
+
     /**************/
     /* Draw stuff */
 
@@ -214,7 +280,7 @@ let
 
     function draw_tiger () = print(indent_string(TIGER, INDENT, ""))
 
-    var text := getinput()
+    var text := get_reaction_or_text(strip(getinput()))
     var wrappedtext := wrap_string(text, MAXWIDTH)
 in
     draw_textbubble(wrappedtext);