started work on move gen

src/main.zig

@@ -1,9 +1,11 @@
 const std = @import("std");
+const mov = @import("move.zig");
 const c = @cImport({
     @cInclude("main.h");
     @cInclude("types.h");
     @cInclude("help.h");
     @cInclude("eval.h");
+    @cInclude("moves.h");
 });
 
 const uciTag = enum {
@@ -16,7 +18,7 @@ const uciTag = enum {
 
 const uciRet = union(uciTag) {
     text: []const u8,
-    move: []const u8,
+    move: []u8,
     game: *c.game,
     exit: void,
     pass: void,
@@ -40,6 +42,7 @@ pub fn main() !void {
             },
             .move => |value| {
                 try std.io.getStdOut().writer().print("bestmove {s}\n", .{value});
+                alloc.free(value);
             },
             .game => |value| {
                 alloc.destroy(game);
@@ -60,7 +63,7 @@ fn uci(str: []const u8, game: *c.game, alloc: std.mem.Allocator) uciRet {
     const tok = str[0..pos];
     if (std.mem.eql(u8, tok, "uci")) return .{ .text = "id name RatChess 0.1\nid author rat<3\nuciok\n" };
     if (std.mem.eql(u8, tok, "isready")) return .{ .text = "readyok\n" };
-    if (std.mem.eql(u8, tok, "go")) return .{ .move = uciGo(game) };
+    if (std.mem.eql(u8, tok, "go")) return .{ .move = uciGo(game, alloc) };
     if (std.mem.eql(u8, tok, "position")) return .{ .game = uciPos(str[(pos + 1)..], alloc) };
     if (std.mem.eql(u8, tok, "exit")) return .{ .exit = {} };
     return .{ .pass = {} };
@@ -107,16 +110,23 @@ fn playMoves(game: [*c]c.game, str: []const u8) [*c]c.game {
     while (splitItr.next()) |moveString| {
         var move: c.move = .{ .To = 0, .From = 0, .Promo = 0 };
         if (moveString.len < 4) continue;
-        move.From = (moveString[0] - 'a') + (moveString[1] - '1');
-        move.To = (moveString[2] - 'a') + (moveString[3] - '1');
+        move.From = (moveString[0] - 'a') + (moveString[1] - '1') * 8;
+        move.To = (moveString[2] - 'a') + (moveString[3] - '1') * 8;
         move.Promo = if (moveString.len == 5) moveString[4] else 0;
         c.makeMove(game, &move);
     }
     return game;
 }
 
-fn uciGo(game: *c.game) []const u8 {
-    return std.mem.span(c.uciGo(game));
+fn uciGo(game: *c.game, alloc: std.mem.Allocator) []u8 {
+    var moves = std.ArrayList(c.move).init(alloc);
+    defer moves.deinit();
+    const str = alloc.alloc(u8, 5) catch unreachable;
+    const m = c.move{ .From = 0, .To = 8, .Promo = 0 };
+    moves.append(m) catch return str;
+    _ = game;
+    mov.moveTypeToStr(m, str);
+    return str;
 }
 
 test "uci uci" {

src/move.zig

@@ -0,0 +1,25 @@
+const std = @import("std");
+const c = @cImport({
+    @cInclude("main.h");
+    @cInclude("types.h");
+    @cInclude("help.h");
+    @cInclude("eval.h");
+    @cInclude("moves.h");
+});
+
+pub fn moveTypeToStr(move: c.move, buf: []u8) void {
+    const xTo = @mod(move.To, 8);
+    const yTo = @divTrunc(move.To, 8);
+    const xFrom = @mod(move.From, 8);
+    const yFrom = @divTrunc(move.From, 8);
+
+    buf[0] = @intCast(xFrom + 'a');
+    buf[1] = @intCast(yFrom + '0' + 1);
+    buf[2] = @intCast(xTo + 'a');
+    buf[3] = @intCast(yTo + '0' + 1);
+    buf[4] = move.Promo;
+}
+
+// pub fn pawnMove(arr: std.ArrayList(c.move)) void {
+//     const move = c.move{ .From = 8, .To = 16, .Promo = 0 };
+// }