merge attempt #1

1 files changed, 14 insertions, 0 deletions

diff --git a/include/dmerkle.hrl b/include/dmerkle.hrl
new file mode 100644
index 00000000..b4fe2a08
--- /dev/null
+++ b/include/dmerkle.hrl
@@ -0,0 +1,14 @@
+-define(DMERKLE_VERSION, 2).
+-define(STATIC_HEADER, 93).
+
+-define(d_from_blocksize(BlockSize), trunc((BlockSize - 17)/16)).
+-define(pointers_from_blocksize(BlockSize), (lib_misc:ceiling(math:log(BlockSize)/math:log(2)) - 3)).
+-define(pointer_for_size(Size, BlockSize), (if Size =< 16 -> 1; Size =< BlockSize -> ?pointers_from_blocksize(Size); true -> last end)).
+-define(size_for_pointer(N), (2 bsl (N+2))).
+-define(headersize_from_blocksize(BlockSize), (?STATIC_HEADER + ?pointers_from_blocksize(BlockSize) * 8)).
+-define(aligned(Ptr, HeaderSize, BlockSize), (((Ptr - (HeaderSize)) rem BlockSize) == 0)).
+-define(block(Ptr, HeaderSize, BlockSize), ((Ptr - (HeaderSize)) div BlockSize)).
+
+-record(node, {m=0, keys=[], children=[], offset=eof}).
+-record(leaf, {m=0, values=[], offset=eof}).
+-record(free, {offset,size=0,pointer=0}).