From 5a7b5f16426b072ab2ffe170ea90b54ee8fa630b Mon Sep 17 00:00:00 2001
From: k <markers711@gmail.com>
Date: Tue, 1 Jul 2025 15:59:39 -0400
Subject: [PATCH] fenGame fn connected to zig

---
 headers/main.h |  6 +++++
 src/main.c     | 63 ++++++++++++++++++++++++++++----------------------
 src/main.zig   | 54 ++++++++++++++++++++++++++++++++++++++++++-
 3 files changed, 94 insertions(+), 29 deletions(-)

diff --git a/headers/main.h b/headers/main.h
index d4157b5..6b4fd6e 100644
--- a/headers/main.h
+++ b/headers/main.h
@@ -1,4 +1,10 @@
 #ifndef MAIN_H
 #define MAIN_H
+#include "types.h"
+
 int cmain();
+game *fenGame(char *str);
+void playMoves(game *g, char *moves);
+void uciGo(game *g);
+
 #endif
diff --git a/src/main.c b/src/main.c
index f41bce7..5512ea5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -10,6 +10,7 @@
 #include "types.h"
 #include "help.h"
 #include "eval.h"
+#include "main.h"
 
 #define BUFF_SIZE 4096
 
@@ -55,38 +56,44 @@ int cmain() {
     } else if (!strcmp("isready", token)) {
       printf("readyok\n");
     } else if (!strcmp("go", token)) {
-      static move mov[1500];//big dumb buffer
-      size_t cnt = 0;
-      cnt += pawnMove(g,mov);
-      cnt += knightMove(g,(mov+cnt));
-      cnt += rookMove(g,(mov+cnt));
-      cnt += bishopMove(g,(mov+cnt));
-      cnt += kingMove(g,(mov+cnt));
-      cnt += queenMove(g,(mov+cnt));
-      move *m = findBest(mov,cnt,g);
-      if(m == NULL){
-	printf("bestmove 0000\n");
-	continue;
-      }
-
-      char *end = "";
-      int yTo, xTo, yFrom, xFrom;
-      xTo = m->To % 8;
-      yTo = m->To / 8 + 1;
-      xFrom = m->From % 8;
-      yFrom = m->From / 8 + 1;
-
-      long long bit = 1LL << m->From;
-      if (m->Promo) {
-	end = "q\n";
-      } else {
-        end = "\n";
-      }
-      printf("bestmove %c%d%c%d%s", ltz[xFrom], yFrom, ltz[xTo], yTo, end);
+      uciGo(g);
     }
   }
 }
 
+void uciGo(game *g){
+  char ltz[] = "abcdefgh";
+  static move mov[1500];//big dumb buffer
+  size_t cnt = 0;
+  cnt += pawnMove(g,mov);
+  cnt += knightMove(g,(mov+cnt));
+  cnt += rookMove(g,(mov+cnt));
+  cnt += bishopMove(g,(mov+cnt));
+  cnt += kingMove(g,(mov+cnt));
+  cnt += queenMove(g,(mov+cnt));
+  move *m = findBest(mov,cnt,g);
+  if(m == NULL){
+    printf("bestmove 0000\n");
+    return;
+  }
+
+  char *end = "";
+  int yTo, xTo, yFrom, xFrom;
+  xTo = m->To % 8;
+  yTo = m->To / 8 + 1;
+  xFrom = m->From % 8;
+  yFrom = m->From / 8 + 1;
+
+  long long bit = 1LL << m->From;
+  if (m->Promo) {
+    end = "q\n";
+  } else {
+    end = "\n";
+  }
+  printf("bestmove %c%d%c%d%s", ltz[xFrom], yFrom, ltz[xTo], yTo, end);
+}
+
+
 game *fenGame(char *str) {
   int rank = 7;
   int file = 0;
diff --git a/src/main.zig b/src/main.zig
index ff253a2..2800300 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,8 +1,60 @@
 const std = @import("std");
 const c = @cImport({
     @cInclude("main.h");
+    @cInclude("types.h");
 });
 
 pub fn main() !void {
-    _ = c.cmain();
+    var gpa = std.heap.GeneralPurposeAllocator(.{}){};
+    defer _ = gpa.deinit();
+    const alloc = gpa.allocator();
+    const stdin = std.io.getStdIn();
+    var reader = stdin.reader();
+
+    while (true) {
+        const line = try reader.readUntilDelimiterAlloc(alloc, '\n', std.math.maxInt(usize));
+        defer alloc.free(line);
+        const l = uci(line);
+        try std.io.getStdOut().writer().print("{s}", .{l});
+    }
+}
+
+fn uci(str: []const u8) []const u8 {
+    const pos = std.mem.indexOfAny(u8, str, " \t\n\r") orelse str.len;
+    const tok = str[0..pos];
+    if (std.mem.eql(u8, tok, "uci")) return "id name RatChess 0.1\nid author rat<3\nuciok";
+    if (std.mem.eql(u8, tok, "isready")) return "readyok\n";
+    if (std.mem.eql(u8, tok, "go")) return "bestmove ";
+    if (std.mem.eql(u8, tok, "position")) _ = uciPos("rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1");
+    return "";
+}
+
+fn uciPos(str: []const u8) [*c]c.game {
+    var buffer: [256]u8 = undefined;
+    const len = @min(str.len, buffer.len - 1);
+    @memcpy(buffer[0..len], str[0..len]);
+    buffer[len] = 0;
+
+    const game = c.fenGame(&buffer);
+    return game;
+}
+
+fn uciGo() []const u8 {
+    return "todo";
+}
+
+test "uci uci" {
+    const out = uci("uci");
+    try std.testing.expect(std.mem.eql(u8, out, "id name RatChess 0.1\nid author rat<3\nuciok"));
+}
+
+test "uci ready" {
+    const out = uci("isready");
+    try std.testing.expect(std.mem.eql(u8, out, "readyok\n"));
+}
+
+test "uci go" {
+    const out = uci("go");
+    const pos = std.mem.indexOfAny(u8, out, " \t\n\r") orelse out.len;
+    try std.testing.expect(std.mem.eql(u8, out[0..pos], "bestmove"));
 }