Additional comment on bitstring.h

diff --git a/bitstring.h b/bitstring.h
index d054de3c51c1cdc95c93bdf72d564dfd46a49ce9..e5e1aed9f7328d0b0155688dab898141cdc5714b 100644 (file)
--- a/bitstring.h
+++ b/bitstring.h
@@ -24,6 +24,8 @@ typedef       unsigned char bitstr_t;
 
 /* internal macros */
                                /* byte of the bitstring bit is in */
+/* in other words, _bit_byte(bitnum) is the index (starting from 0) of the byte
+ * which contain the bit number 'bitnum' */
 #define        _bit_byte(bit) \
        ((bit) >> 3)