Implemented classic safe autohoming

nnfc.awk

@@ -1,5 +1,5 @@
 # no-nonsense FreeCell in POSIX AWK
-# run as: [n]awk -f nnfc.awk [-v ASCII=1] [-v MONOCHROME=1] [-v SEED=x] [-v NAH=1]
+# run as: [n]awk -f nnfc.awk [-v ASCII=1] [-v MONOCHROME=1] [-v SEED=x]
 # commands: q - quit, u - undo, h - help, r - restart the run
 # [number][number] - move from column/freecell to column/freecell/foundation:
 # - 0 is foundation (can be omitted)
@@ -105,12 +105,13 @@ function undo(i) { # undo functionality
 
 # main logic/move function (also handles the undo)
 # statuses: 0 - invalid move, 1 - continue, 2 - victory
-function domove(cmd,  valid, nums, from, to, amt, i, si, ec, efc) {
+function domove(cmd, isauto,  valid, nums, from, to, amt, i, si, ec, efc) {
   valid = 0 # invalid by default until all checks are done
   # if cmd is not q, h, r or u, then it must be two "digits"
   split(cmd, nums, "") # parse the command as a whole
   from = nums[1] # location from which we're moving
   to = nums[2] # location to which we're moving
+  if(to == "h") to = 0 # for compatibility with standard notation
   amt = 1 # the amount of cards being moved (default 1)
   # identify free cells
   if(from == "a") from = 9
@@ -167,7 +168,17 @@ function domove(cmd,  valid, nums, from, to, amt, i, si, ec, efc) {
     if(cval > -1) { # we are moving a non-empty value
       if(to == 0) { # moving to a foundation
         si = getsuit(cval) # get suit index
-        if((fnd[si]%13) == ((cval%13) - 1)) { # we can move there
+        efc = cval % 13 # reuse for card rank value
+        if((fnd[si]%13) == (efc - 1)) { # we can move there
+          # check the automove constraints, aces and twos are always played
+          if(isauto && efc > 1) {
+            # check if all cards with efc-1 of the opposite color are there
+            if(getcolor(cval) == 0) { # we're red, check black
+              if(!(fnd[0] >= (efc - 1) && fnd[3] >= (efc - 1))) return 0
+            } else { # we're black, check red
+              if(!(fnd[1] >= (efc - 1) && fnd[2] >= (efc - 1))) return 0
+            }
+          }
           fnd[si] = cval 
           if(from < 9) { # moving from a tableau
             delete table[rfrom,tablens[rfrom]-1] # delete the card
@@ -226,20 +237,20 @@ function autohome(chres, lres, i) {
   do {
     chres = 0
     for(i=1;i<9;i++) {
-      lres = domove(i "0")
+      lres = domove(i "0", 1)
       if(lres == 2) return 2
       else chres += lres
     }
-    lres = domove("a0")
+    lres = domove("a0", 1)
     if(lres == 2) return 2
     else chres += lres
-    lres = domove("b0")
+    lres = domove("b0", 1)
     if(lres == 2) return 2
     else chres += lres
-    lres = domove("c0")
+    lres = domove("c0", 1)
     if(lres == 2) return 2
     else chres += lres
-    lres = domove("d0")
+    lres = domove("d0", 1)
     if(lres == 2) return 2
     else chres += lres
   } while(chres > 0)
@@ -253,7 +264,6 @@ function help() {
   print "-v ASCII=1\tuse ASCII instead of Unicode suits"
   print "-v MONOCHROME=1\tdon't use colors"
   print "-v SEED=xxxxx\tset game seed number (M$-compatible)"
-  print "-v NAH=1\tdisable autohoming after every move (use ah for this)"
   print "Commands: q - quit, u - undo, r - restart, h -  this help"
   print "Moves: [digit][digit], where \"digits\" are:"
   print "- 0 is foundation (can be omitted)"
@@ -327,17 +337,15 @@ BEGIN { # main code part
     cmd = tolower(cmd) # accept both uppercase and lowercase
     if(cmd == "q") {print "Quitting..."; break}
     else if(cmd == "h")  res = help()
-    else if(cmd == "ah") res = autohome()
     else if(cmd == "u")  undo()
     else if(cmd == "r") { # restart logic
       while(undoidx > 0) undo()
       undomoves = 0
     } else { # pass the command to the logic function
       undomoves = 0 # set global undo move counter
-      res = domove(cmd) 
+      res = domove(cmd, 0) # manual move 
       if(res == 0) print "Invalid move!"
-      else if(NAH != 1 && res < 2) res = autohome()
+      else if(res < 2) res = autohome()
-      print "Undomoves:", undomoves
     }
     render()
     if(res == 2) {print "Victory!"; break}