(svn r23) -Some omments on the code (blathijs)

1 files changed, 9 insertions, 0 deletions

diff --git a/macros.h b/macros.h
index 0574520ef..bd89d6803 100644
--- a/macros.h
+++ b/macros.h
@@ -130,7 +130,14 @@ extern uint SafeTileAdd(uint x, int add, const char *exp, const char *file, int
 #define SPRITE_PALETTE(x) ((x) + 0x8000)
 
 extern const byte _ffb_64[128];
+/* Returns the position of the first bit that is not zero, counted from the
+ * left. Ie, 10110100 returns 2, 00000001 returns 0, etc. When x == 0 returns
+ * 0.
+ */
 #define FIND_FIRST_BIT(x) _ffb_64[(x)]
+/* Returns x with the first bit that is not zero, counted from the left, set
+ * to zero. So, 10110100 returns 10110000, 00000001 returns 00000000, etc.
+ */
 #define KILL_FIRST_BIT(x) _ffb_64[(x)+64]
 
 static INLINE int FindFirstBit2x64(int value)
@@ -212,4 +219,6 @@ static INLINE void WRITE_LE_UINT16(const void *b, uint16 x) {
 	((byte*)b)[1] = (byte)(x >> 8);
 }
 
+#define MAX_DETOUR 6
+
 #endif /* MACROS_H */