From 5a25eba8f64598afad56a17f59ab99cf38dc6a8c Mon Sep 17 00:00:00 2001
From: Josh <josh@joshuaschuett.com>
Date: Sun, 17 Aug 2025 12:17:51 -0400
Subject: [PATCH] Add move_gen function

---
 engine/include/bitboard.h | 10 +++++++++-
 engine/src/bitboard.c     | 31 ++++++++++++++++++++++++++++++-
 2 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/engine/include/bitboard.h b/engine/include/bitboard.h
index 3d940a8..acd9318 100644
--- a/engine/include/bitboard.h
+++ b/engine/include/bitboard.h
@@ -106,4 +106,12 @@ void create_knight_attack_cache();
 void create_pawn_attack_cache();
 void create_king_attack_cache();
 void print_board();
-int gen_pseudo_moves(struct Board *b, struct Move *out, bool captures_only);
\ No newline at end of file
+void gen_white_pawn_quiet_pushes(const struct Board *board, struct Move *moves, int *count);
+void gen_black_pawn_quiet_pushes(const struct Board *board, struct Move *moves, int *count);
+void gen_white_pawn_push_promotions(const struct Board *board, struct Move *moves, int *count);
+void gen_black_pawn_push_promotions(const struct Board *board, struct Move *moves, int *count);
+void gen_white_pawn_captures(const struct Board *board, struct Move *moves, int *count);
+void gen_black_pawn_captures(const struct Board *board, struct Move *moves, int *count);
+void gen_white_pawn_capture_promotions(const struct Board *board, struct Move *moves, int *count);
+void gen_black_pawn_capture_promotions(const struct Board *board, struct Move *moves, int *count);
+int gen_pseudo_moves(const struct Board *board, struct Move *out, bool captures_only);
\ No newline at end of file
diff --git a/engine/src/bitboard.c b/engine/src/bitboard.c
index a69f3bb..3583eb4 100644
--- a/engine/src/bitboard.c
+++ b/engine/src/bitboard.c
@@ -458,7 +458,7 @@ void gen_queen_moves(const struct Board *board, struct Move *out, int *count, bo
     }
 }
 
-void gen_king_moves(struct Board *board, struct Move *out, int *count, bool captures_only) {
+void gen_king_moves(const struct Board *board, struct Move *out, int *count, bool captures_only) {
     enum Color side = board->side_to_move;
     uint64_t own = board->occ[side];
     uint64_t opp = board->occ[side ^ 1];
@@ -502,6 +502,35 @@ void gen_king_moves(struct Board *board, struct Move *out, int *count, bool capt
     }
 }
 
+int gen_pseudo_moves(const struct Board *board, struct Move *moves, bool captures_only) {
+    int count = 0;
+
+    if (board->side_to_move == WHITE) {
+        if (!captures_only) {
+            gen_white_pawn_quiet_pushes(board, moves, &count);
+            gen_white_pawn_push_promotions(board, moves, &count);
+        }
+        gen_white_pawn_captures(board, moves, &count);
+        gen_white_pawn_capture_promotions(board, moves, &count);
+    } else {
+        if (!captures_only) {
+            gen_black_pawn_quiet_pushes(board, moves, &count);
+            gen_black_pawn_push_promotions(board, moves, &count);
+        }
+        gen_black_pawn_captures(board, moves, &count);
+        gen_black_pawn_capture_promotions(board, moves, &count);
+    }
+
+    gen_knight_moves(board, moves, &count, captures_only);
+    gen_king_moves(board, moves, &count, captures_only);
+    gen_rook_moves(board, moves, &count, captures_only);
+    gen_bishop_moves(board, moves, &count, captures_only);
+    gen_queen_moves(board, moves, &count, captures_only);
+
+    return count;
+}
+
+
 void print_board(const struct Board *board) {
     const char PIECE_CH[12] = {
         'P','N','B','R','Q','K',