From 28164beb37d1e3bab60ab5d13422344110691fe8 Mon Sep 17 00:00:00 2001
From: Bruno Raoult <braoult@gmail.com>
Date: Fri, 12 Nov 2021 10:57:47 +0100
Subject: [PATCH] board.h: add square defs for both 0x88 & bitboards

---
 TODO.md      |  8 ++++++++
 fentests.txt |  6 ++++++
 src/board.h  | 39 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 TODO.md

diff --git a/TODO.md b/TODO.md
new file mode 100644
index 0000000..4b9ed88
--- /dev/null
+++ b/TODO.md
@@ -0,0 +1,8 @@
+## TODO
+
+### NEXT STEPS
+
+### IDEAS
+- `move_gen()`: `doit` is maybe redundant with test on current turn.
+
+### MISC
diff --git a/fentests.txt b/fentests.txt
index 299e1a9..cc19f35 100644
--- a/fentests.txt
+++ b/fentests.txt
@@ -1,2 +1,8 @@
 '4k3/4p3/8/b7/1BR1p2p/1Q3P2/5N2/4K3 w - - 0 1'
 'r1bq1rk1/pppp1ppp/2n2n2/4p3/2B1P3/3PPN2/PPP3PP/RN1QK2R b KQ - 1 7'
+'6k1/6pp/R2p4/p1p5/8/1P1r3P/6P1/6K1 b - - 3 37'
+
+# both can castle queen only
+'r3k2r/8/3B4/8/8/3b4/8/R3K2R w KQkq - 0 1'
+'r3k2r/8/3BB3/8/8/3bb3/8/R3K2R w KQkq - 0 1'
+'r2bkb1r/8/8/8/8/3bb3/8/R2BKB1R w KQkq - 0 1'
diff --git a/src/board.h b/src/board.h
index 3de4dc2..602bd4a 100644
--- a/src/board.h
+++ b/src/board.h
@@ -62,4 +62,43 @@ typedef struct board_s {
 #define FILE2C(f)    ((f) + 'a')
 #define RANK2C(r)    ((r) + '1')
 
+enum x88_square {
+    x88_A1=0x00, x88_B1, x88_C1, x88_D1, x88_E1, x88_F1, x88_G1, x88_H1,
+    x88_A2=0x10, x88_B2, x88_C2, x88_D2, x88_E2, x88_F2, x88_G2, x88_H2,
+    x88_A3=0x20, x88_B3, x88_C3, x88_D3, x88_E3, x88_F3, x88_G3, x88_H3,
+    x88_A4=0x30, x88_B4, x88_C4, x88_D4, x88_E4, x88_F4, x88_G4, x88_H4,
+    x88_A5=0x40, x88_B5, x88_C5, x88_D5, x88_E5, x88_F5, x88_G5, x88_H5,
+    x88_A6=0x50, x88_B6, x88_C6, x88_D6, x88_E6, x88_F6, x88_G6, x88_H6,
+    x88_A7=0x60, x88_B7, x88_C7, x88_D7, x88_E7, x88_F7, x88_G7, x88_H7,
+    x88_A8=0x70, x88_B8, x88_C8, x88_D8, x88_E8, x88_F8, x88_G8, x88_H8,
+};
+
+/* necessary not to become mad to set bitboards
+ */
+enum bb_square{
+    A1=(u64)1,     B1=(u64)A1<<1, C1=(u64)B1<<1, D1=(u64)C1<<1,
+    E1=(u64)D1<<1, F1=(u64)E1<<1, G1=(u64)F1<<1, H1=(u64)G1<<1,
+
+    A2=(u64)A1<<8, B2=(u64)B1<<8, C2=(u64)C1<<8, D2=(u64)D1<<8,
+    E2=(u64)E1<<8, F2=(u64)F1<<8, G2=(u64)G1<<8, H2=(u64)H1<<8,
+
+    A3=(u64)A2<<8, B3=(u64)B2<<8, C3=(u64)C2<<8, D3=(u64)D2<<8,
+    E3=(u64)E2<<8, F3=(u64)F2<<8, G3=(u64)G2<<8, H3=(u64)H2<<8,
+
+    A4=(u64)A3<<8, B4=(u64)B3<<8, C4=(u64)C3<<8, D4=(u64)D3<<8,
+    E4=(u64)E3<<8, F4=(u64)F3<<8, G4=(u64)G3<<8, H4=(u64)H3<<8,
+
+    A5=(u64)A4<<8, B5=(u64)B4<<8, C5=(u64)C4<<8, D5=(u64)D4<<8,
+    E5=(u64)E4<<8, F5=(u64)F4<<8, G5=(u64)G4<<8, H5=(u64)H4<<8,
+
+    A6=(u64)A5<<8, B6=(u64)B5<<8, C6=(u64)C5<<8, D6=(u64)D5<<8,
+    E6=(u64)E5<<8, F6=(u64)F5<<8, G6=(u64)G5<<8, H6=(u64)H5<<8,
+
+    A7=(u64)A6<<8, B7=(u64)B6<<8, C7=(u64)C6<<8, D7=(u64)D6<<8,
+    E7=(u64)E6<<8, F7=(u64)F6<<8, G7=(u64)G6<<8, H7=(u64)H6<<8,
+
+    A8=(u64)A7<<8, B8=(u64)B7<<8, C8=(u64)C7<<8, D8=(u64)D7<<8,
+    E8=(u64)E7<<8, F8=(u64)F7<<8, G8=(u64)G7<<8, H8=(u64)H7<<8,
+};
+
 #endif  /* BOARD_H */