Add king move gen and a test.c file for quick debug

engine/src/test.c

@@ -1,33 +1,116 @@
-/**
-    A quick test script to debug and visually inspect functions
-    and operations.
-*/
-
-
+// engine/src/test_pawns.c
 #include <stdio.h>
 #include <string.h>
 #include "bitboard.h"
 #include "fen.h"
 
+enum { MAX_MOVES = 256 };
 
-static int popcount64(uint64_t x){ int c=0; while(x){ x&=x-1; ++c; } return c; }
-static const char NAME[12] = {'P','N','B','R','Q','K','p','n','b','r','q','k'};
+void sq_to_coord(int sq, char out[3]) {
+    out[0] = 'a' + (sq % 8);
+    out[1] = '1' + (sq / 8);
+    out[2] = '\0';
+}
 
+void print_move(struct Move *m) {
+    char f[3], t[3];
+    sq_to_coord(m->from, f);
+    sq_to_coord(m->to,   t);
+
+    printf("%s%s", f, t);
+    if (m->flags) {
+        printf(" [");
+        int first = 1;
+        if (m->flags & MF_CAPTURE)     { printf("%sCAP", first?"":"|"); first = 0; }
+        if (m->flags & MF_DOUBLE_PUSH) { printf("%sDP",  first?"":"|"); first = 0; }
+        if (m->flags & MF_ENPASSANT)   { printf("%sEP",  first?"":"|"); first = 0; }
+        if (m->flags & MF_PROMO)       { printf("%sPROMO->%c", first?"":"|", (char)(m->promo ? "PNBRQKpnbrqk"[m->promo] : 'Q')); }
+        printf("]");
+    }
+}
+
+void dump_moves(const char *title, struct Move *moves, int count) {
+    printf("%s (%d):\n", title, count);
+    for (int i = 0; i < count; ++i) { print_move(&moves[i]); putchar('\n'); }
+    putchar('\n');
+}
 
 int main(void) {
-    const char *fen = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
+    // change this FEN to target specific cases you want to test
+    //const char *fen_startpos = "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1";
+    const char *fen_startpos = "8/8/8/8/8/8/8/8 w KQkq - 0 1";
+    const char *fen = fen_startpos;
 
     struct Board b;
+    memset(&b, 0, sizeof(b));
 
-    int rc = load_fen(&b, fen);
-
-    for (int i=0;i<12;i++) printf("%c: %d\n", NAME[i], popcount64(b.pieces[i]));
-
-    if (rc != 0) {
-        fprintf(stderr, "load_fen failed (rc=%d) for FEN:\n%s\n", rc, fen);
+    if (load_fen(&b, fen) != 0) {
+        fprintf(stderr, "load_fen failed\n");
         return 1;
     }
 
-    print_board(&b);
+    struct Move moves[MAX_MOVES];
+    int count;
+
+    /*
+    // --- WHITE pawns: quiet pushes (single + double, no promos) ---
+    count = 0;
+    gen_white_pawn_quiet_pushes(&b, moves, &count);
+    dump_moves("white quiet pushes", moves, count);
+
+
+    // --- BLACK pawns: quiet pushes ---
+    gen_black_pawn_quiet_pushes(&b, moves, &count);
+    dump_moves("black quiet pushes", moves, count);
+
+    printf("COUNT: %d", count);
+    */
+    
+    create_knight_attack_cache();
+    //create_king_attack_cache();
+    //create_pawn_attack_cache();
+
+    int n = gen_pseudo_moves(&b, moves, false);
+    printf("COUNT: %d", n);
+
+    /*
+    // --- WHITE pawns: quiet push promotions (queen-only) ---
+    count = 0;
+    gen_white_pawn_push_promotions_q(&b, moves, &count);
+    dump_moves("white push promotions (Q only)", moves, count);
+
+    // --- WHITE pawns: captures (non-promo) + en passant ---
+    count = 0;
+    gen_white_pawn_captures(&b, moves, &count);
+    dump_moves("white captures (non-promo + EP)", moves, count);
+
+    // --- WHITE pawns: capture promotions (queen-only) ---
+    count = 0;
+    gen_white_pawn_capture_promotions_q(&b, moves, &count);
+    dump_moves("white capture promotions (Q only)", moves, count);
+
+    // Flip side to move if you want to test black without changing FEN side
+    b.side_to_move = BLACK;
+
+    // --- BLACK pawns: quiet pushes ---
+    count = 0;
+    gen_black_pawn_quiet_pushes(&b, moves, &count);
+    dump_moves("black quiet pushes", moves, count);
+
+    // --- BLACK pawns: quiet push promotions (queen-only) ---
+    count = 0;
+    gen_black_pawn_push_promotions_q(&b, moves, &count);
+    dump_moves("black push promotions (q only)", moves, count);
+
+    // --- BLACK pawns: captures (non-promo) + en passant ---
+    count = 0;
+    gen_black_pawn_captures(&b, moves, &count);
+    dump_moves("black captures (non-promo + EP)", moves, count);
+
+    // --- BLACK pawns: capture promotions (queen-only) ---
+    count = 0;
+    gen_black_pawn_capture_promotions_q(&b, moves, &count);
+    dump_moves("black capture promotions (q only)", moves, count);
+    */
     return 0;
-}
+}