59 #define diff_atom_root_idx(DIFF_DATA, ATOM) \  argument
60 	((ATOM) && ((ATOM) >= (DIFF_DATA)->root->atoms.head) \
61 	 ? (unsigned int)((ATOM) - ((DIFF_DATA)->root->atoms.head)) \
62 	 : (DIFF_DATA)->root->atoms.len)
66 #define diff_atom_idx(DIFF_DATA, ATOM) \  argument
67 	((ATOM) && ((ATOM) >= (DIFF_DATA)->atoms.head) \
68 	 ? (unsigned int)((ATOM) - ((DIFF_DATA)->atoms.head)) \
69 	 : (DIFF_DATA)->atoms.len)
78 #define diff_data_foreach_atom(ATOM, DIFF_DATA) \  argument
79 	foreach_diff_atom(ATOM, (DIFF_DATA)->atoms.head, (DIFF_DATA)->atoms.len)
81 #define diff_data_foreach_atom_from(FROM, ATOM, DIFF_DATA) \  argument
84 	     && ((ATOM) >= (DIFF_DATA)->atoms.head) \
85 	     && ((ATOM) - (DIFF_DATA)->atoms.head < (DIFF_DATA)->atoms.len); \
88 #define diff_data_foreach_atom_backwards_from(FROM, ATOM, DIFF_DATA) \  argument
91 	     && ((ATOM) >= (DIFF_DATA)->atoms.head) \
92 	     && ((ATOM) - (DIFF_DATA)->atoms.head >= 0); \