1 files changed, 124 insertions, 0 deletions
diff --git a/chessboard-graphic.mu b/chessboard-graphic.mu
new file mode 100644
index 00000000..fd66c852
--- /dev/null
+++ b/chessboard-graphic.mu
@@ -0,0 +1,124 @@
+;; data structure: board
+(primitive square)
+(address square-address (square))  ; pointer. verbose but sadly necessary for now
+(array file (square))  ; ranks and files are arrays of squares
+(address file-address (file))
+(address file-address-address (file-address))  ; pointer to a pointer
+(array board (file-address))
+(address board-address (board))
+
+(function read-board [
+  (default-space:space-address <- new space:literal 30:literal)
+  (initial-position:list-address <- init-list R:literal P:literal _:literal _:literal _:literal _:literal p:literal r:literal
+                                              N:literal P:literal _:literal _:literal _:literal _:literal p:literal n:literal
+                                              B:literal P:literal _:literal _:literal _:literal _:literal p:literal b:literal
+                                              Q:literal P:literal _:literal _:literal _:literal _:literal p:literal q:literal
+                                              K:literal P:literal _:literal _:literal _:literal _:literal p:literal k:literal
+                                              B:literal P:literal _:literal _:literal _:literal _:literal p:literal b:literal
+                                              N:literal P:literal _:literal _:literal _:literal _:literal p:literal n:literal
+                                              R:literal P:literal _:literal _:literal _:literal _:literal p:literal r:literal)
+  ; assert(length(initial-position) == 64)
+  (len:integer <- list-length initial-position:list-address)
+  (correct-length?:boolean <- equal len:integer 64:literal)
+  (assert correct-length?:boolean (("chessboard had incorrect size" literal)))
+  (b:board-address <- new board:literal 8:literal)
+  (col:integer <- copy 0:literal)
+  (curr:list-address <- copy initial-position:list-address)
+  { begin
+    (done?:boolean <- equal col:integer 8:literal)
+    (break-if done?:boolean)
+    (file:file-address-address <- index-address b:board-address/deref col:integer)
+    (file:file-address-address/deref curr:list-address <- read-file curr:list-address)
+    (col:integer <- add col:integer 1:literal)
+    (loop)
+  }
+  (reply b:board-address)
+])
+
+(function read-file [
+  (default-space:space-address <- new space:literal 30:literal)
+  (cursor:list-address <- next-input)
+  (result:file-address <- new file:literal 8:literal)
+  (row:integer <- copy 0:literal)
+  { begin
+    (done?:boolean <- equal row:integer 8:literal)
+    (break-if done?:boolean)
+    (src:tagged-value-address <- list-value-address cursor:list-address)
+    (dest:square-address <- index-address result:file-address/deref row:integer)
+    (dest:square-address/deref <- get src:tagged-value-address/deref payload:offset)  ; unsafe typecast
+    (cursor:list-address <- list-next cursor:list-address)
+    (row:integer <- add row:integer 1:literal)
+    (loop)
+  }
+  (reply result:file-address cursor:list-address)
+])
+
+(function print-board [
+  (default-space:space-address <- new space:literal 30:literal)
+  (b:board-address <- next-input)
+  (y:integer <- copy 0:literal)
+  (row:integer <- copy 7:literal)
+  ; print each row
+  { begin
+    (done?:boolean <- less-than row:integer 0:literal)
+    (break-if done?:boolean)
+    ; print each square in the row
+    (x:integer <- copy 0:literal)
+    (col:integer <- copy 0:literal)
+    { begin
+      (done?:boolean <- equal col:integer 8:literal)
+      (break-if done?:boolean)
+      (f:file-address <- index b:board-address/deref col:integer)
+      (s:square <- index f:file-address/deref row:integer)
+      { begin
+        ; print black squares, leave others white
+        ; todo: print pieces
+        (t1:integer <- add row:integer col:integer)
+        (_ t2:integer <- divide-with-remainder t1:integer 2:literal)
+        (black?:boolean <- equal t2:integer 1:literal)
+        (break-if black?:boolean)
+        (rectangle x:integer y:integer 40:literal 40:literal (("black" literal)))
+      }
+      (col:integer <- add col:integer 1:literal)
+      (x:integer <- add x:integer 40:literal)
+      (loop)
+    }
+    (row:integer <- subtract row:integer 1:literal)
+    (y:integer <- add y:integer 40:literal)
+    (loop)
+  }
+])
+
+;; data structure: move
+(and-record move [
+  from:integer-integer-pair
+  to:integer-integer-pair
+])
+
+(address move-address (move))
+
+(function read-move [
+  (default-space:space-address <- new space:literal 30:literal)
+])
+
+(function make-move [
+  (default-space:space-address <- new space:literal 30:literal)
+])
+
+(function main [
+  (default-space:space-address <- new space:literal 30:literal)
+  (b:board-address <- read-board)
+  (graphics-on)
+;?   (rectangle 0:literal 0:literal 100:literal 200:literal (("black" literal)))
+;?   (wait-for-key)
+;?   (reply)
+  { begin
+    (clear-screen)
+    (print-board b:board-address)
+    (wait-for-mouse)
+;?     (m:move-address <- read-move)
+;?     (b:board-address <- make-move b:board-address m:move-address)
+;?     (loop)
+  }
+  (graphics-off)
+])