Merge branch 'master' of github.com:gavofyork/ethcore-util

Cargo.toml

@@ -16,7 +16,6 @@ rand = "0.3.12"
 time = "0.1.34"
 tiny-keccak = "1.0"
 rocksdb = "0.2.1"
-num = "0.1"
 lazy_static = "0.1.*"
 secp256k1 = "0.5.1"
 rust-crypto = "0.2.34"

src/chainfilter.rs

@@ -41,7 +41,6 @@
 use std::collections::{HashMap};
 use hash::*;
 use sha3::*;
-use num::pow;
 
 /// Represents bloom index in cache
 /// 
@@ -119,13 +118,21 @@ impl<'a, D> ChainFilter<'a, D> where D: FilterDataSource
 		let mut filter = ChainFilter {
 			data_source: data_source,
 			index_size: index_size,
-			level_sizes: vec![]
+			// 0 level has always a size of 1
+			level_sizes: vec![1]
 		};
 
 		// cache level sizes, so we do not have to calculate them all the time
-		for i in 0..levels {
+		// eg. if levels == 3, index_size = 16
-			filter.level_sizes.push(pow(index_size, i as usize));
+		// level_sizes = [1, 16, 256]
-		}
+		let additional: Vec<usize> = (1..).into_iter()
+			.scan(1, |acc, _| {
+				*acc = *acc * index_size; 
+				Some(*acc)
+			})
+			.take(levels as usize - 1)
+			.collect();
+		filter.level_sizes.extend(additional);
 
 		filter
 	}

src/hash.rs

@@ -9,6 +9,7 @@ use rand::Rng;
 use rand::os::OsRng;
 use bytes::BytesConvertable;
 use math::log2;
+use uint::U256;
 
 /// types implementing FixedHash must be also BytesConvertable
 pub trait FixedHash: Sized + BytesConvertable {
@@ -307,6 +308,16 @@ macro_rules! impl_hash {
 	}
 }
 
+impl<'a> From<&'a U256> for H256 {
+    fn from(value: &'a U256) -> H256 {
+		unsafe {
+			let mut ret: H256 = ::std::mem::uninitialized();
+			value.to_bytes(&mut ret);
+			ret
+		}
+    }
+}
+
 impl_hash!(H32, 4);
 impl_hash!(H64, 8);
 impl_hash!(H128, 16);

src/lib.rs

@@ -1,13 +1,37 @@
 //! Ethcore-util library
 //!
-//! TODO: check reexports
+//! ### Rust version:
+//! - beta
+//! - nightly
+//! 
+//! ### Supported platforms:
+//! - OSX
+//! - Linux
+//!
+//! ### Dependencies:
+//! - RocksDB 3.13 
+//! 
+//! ### Dependencies Installation:
+//!
+//! - OSX:
+//! 
+//!   ```bash
+//!   brew install rocksdb
+//!   ```
+//! 
+//! - From source:
+//!
+//!   ```bash
+//!   wget https://github.com/facebook/rocksdb/archive/rocksdb-3.13.tar.gz
+//!   tar xvf rocksdb-3.13.tar.gz && cd rocksdb-rocksdb-3.13 && make shared_lib
+//!   sudo make install
+//!   ```
 
 extern crate rustc_serialize;
 extern crate mio;
 extern crate rand;
 extern crate rocksdb;
 extern crate tiny_keccak;
-extern crate num;
 #[macro_use]
 extern crate log;
 #[macro_use]
@@ -39,12 +63,3 @@ pub mod trie;
 pub mod nibbleslice;
 
 //pub mod network;
-
-// reexports
-pub use std::str::FromStr;
-pub use hash::*;
-pub use sha3::*;
-pub use bytes::*;
-pub use hashdb::*;
-pub use memorydb::*;
-