From f0d5cde50cc7a825acadbfe58b6046a4912f4814 Mon Sep 17 00:00:00 2001
From: tslil <tslil@posteo.de>
Date: Fri, 1 Jan 2021 11:45:12 -0500
Subject: tak.h now tracks win state, optimisations, saved a byte on counts

---
 src/ctaklm.c | 71 ++++++++++++++++++++++++++++++++----------------------------
 1 file changed, 38 insertions(+), 33 deletions(-)

(limited to 'src')

diff --git a/src/ctaklm.c b/src/ctaklm.c
index 5dbfde8..5ad7e8e 100644
--- a/src/ctaklm.c
+++ b/src/ctaklm.c
@@ -146,15 +146,15 @@ print_info(void) {
          rst,
          (ply < 2) ? " (counter-play start)" : "");
   printf("Flats remaining: %sWhite%s %02d, %sBlack%s %02d\n",
-         wht,rst,white_flats,
-         blk,rst,black_flats);
+         wht,rst,white_count & 127,
+         blk,rst,black_count & 127);
   printf("Caps remaining:  %sWhite%s  %d, %sBlack%s  %d\n",
-         wht,rst,white_caps,
-         blk,rst,black_caps);
+         wht,rst,white_count >> 7,
+         blk,rst,black_count >> 7);
 }
 
 char *gamelog = 0;
-uint8_t auto_board = 0xFF, auto_info = 0xFF, won = 0x00;
+uint8_t auto_board = 0xFF, auto_info = 0xFF;
 
 static void
 append_to_gamelog(char *line, const uint8_t win_line) {
@@ -182,43 +182,49 @@ append_to_gamelog(char *line, const uint8_t win_line) {
 
 static void
 end_game(char *line, char *win) {
-  won = 0xFF;
   append_to_gamelog(line, 0);
   append_to_gamelog(win, 1);
   print_board();
   puts("Game over:");
   puts(gamelog);
-  puts("\nEnter `new' to play again.");
+  putchar('\n');
 }
 
 static void
 handle_turn(char *line) {
-  if (won) {
-    puts("Game over, enter `new' to play again.");
-  } else {
-    switch (do_ptn(line)) {
-      // Errors
-      case PTN_INVALID : { puts("Invalid PTN."); break; }
-      case ACT_ILLEGAL : { puts("Illegal action."); break; }
-      case ACT_OVERFLOW : {
-        puts("Move would cause internal overflow, select another.");
-        break;
-      }
-        // Valid, append to game log
-      case PTN_VALID:
-      case ACT_OK: {
-        append_to_gamelog(line, 0);
-        if (auto_info) print_info();
-        if (auto_board) print_board();
-        break;
+  // Track win state
+  uint8_t new_win = (won == -1);
+  switch (do_ptn(line)) {
+    // Errors
+    case PTN_INVALID:  { puts("Invalid PTN."); break; }
+    case ACT_ILLEGAL:  { puts("Illegal action."); break; }
+    case ACT_OVERFLOW: {
+      puts("Move would cause internal overflow, select another.");
+      break;
+    }
+      // Game has ended
+    case GAME_END: {
+      // Did it end this turn?
+      if (new_win) {
+        switch (won) {
+          case WIN_DRAGON:     { end_game(line,"R-R");     break; }
+          case WIN_DRAW:       { end_game(line,"1/2-1/2"); break; }
+          case WIN_FLAT_BLACK: { end_game(line,"0-F");     break; }
+          case WIN_FLAT_WHITE: { end_game(line,"F-0");     break; }
+          case WIN_ROAD_BLACK: { end_game(line,"0-R");     break; }
+          case WIN_ROAD_WHITE: { end_game(line,"R-0");     break; }
+        }
       }
-        // A win
-      case WIN_DRAGON:     { end_game(line,"R-R");     break; }
-      case WIN_DRAW:       { end_game(line,"1/2-1/2"); break; }
-      case WIN_FLAT_BLACK: { end_game(line,"0-F");     break; }
-      case WIN_FLAT_WHITE: { end_game(line,"F-0");     break; }
-      case WIN_ROAD_BLACK: { end_game(line,"0-R");     break; }
-      case WIN_ROAD_WHITE: { end_game(line,"R-0");     break; }
+      puts("Game over, enter `new' to play again.");
+      break;
+    }
+      // Valid, append to game log
+    case PTN_VALID:
+    case ACT_OK: {
+      append_to_gamelog(line, 0);
+      if (auto_info) print_info();
+      if (auto_board) print_board();
+      break;
     }
   }
 }
@@ -226,7 +232,6 @@ handle_turn(char *line) {
 static void
 new_game(uint8_t size) {
   reset_state(size);
-  won = 0x00;
   printf("New %dx%d game!\n",size,size);
   if (gamelog) gamelog = realloc(gamelog, sizeof(char));
   else gamelog = malloc(sizeof(char));
-- 
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