2014-08-27 17:19:10 +00:00
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// Bitcoin secp256k1 bindings
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// Written in 2014 by
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// Dawid Ciężarkiewicz
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// Andrew Poelstra
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//
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// To the extent possible under law, the author(s) have dedicated all
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// copyright and related and neighboring rights to this software to
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// the public domain worldwide. This software is distributed without
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// any warranty.
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//
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// You should have received a copy of the CC0 Public Domain Dedication
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// along with this software.
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// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
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//
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#![macro_escape]
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// This is a macro that routinely comes in handy
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macro_rules! impl_array_newtype(
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($thing:ident, $ty:ty, $len:expr) => {
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impl $thing {
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#[inline]
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/// Provides an immutable view into the object
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pub fn as_slice<'a>(&'a self) -> &'a [$ty] {
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let &$thing(ref dat) = self;
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dat.as_slice()
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}
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#[inline]
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/// Provides an immutable view into the object from index `s` inclusive to `e` exclusive
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pub fn slice<'a>(&'a self, s: uint, e: uint) -> &'a [$ty] {
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let &$thing(ref dat) = self;
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dat.slice(s, e)
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}
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#[inline]
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/// Provides an immutable view into the object, up to index `n` exclusive
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pub fn slice_to<'a>(&'a self, n: uint) -> &'a [$ty] {
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let &$thing(ref dat) = self;
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dat.slice_to(n)
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}
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#[inline]
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/// Provides an immutable view into the object, starting from index `n`
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pub fn slice_from<'a>(&'a self, n: uint) -> &'a [$ty] {
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let &$thing(ref dat) = self;
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dat.slice_from(n)
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}
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#[inline]
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/// Converts the object to a raw pointer for FFI interfacing
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pub fn as_ptr(&self) -> *const $ty {
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let &$thing(ref dat) = self;
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dat.as_ptr()
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}
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#[inline]
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/// Converts the object to a mutable raw pointer for FFI interfacing
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pub fn as_mut_ptr(&mut self) -> *mut $ty {
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let &$thing(ref mut dat) = self;
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dat.as_mut_ptr()
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}
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#[inline]
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/// Returns the length of the object as an array
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pub fn len(&self) -> uint { $len }
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}
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impl PartialEq for $thing {
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#[inline]
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fn eq(&self, other: &$thing) -> bool {
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self.as_slice() == other.as_slice()
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}
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}
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impl Eq for $thing {}
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impl Clone for $thing {
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#[inline]
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fn clone(&self) -> $thing {
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unsafe {
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use std::intrinsics::copy_nonoverlapping_memory;
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use std::mem;
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let mut ret: $thing = mem::uninitialized();
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copy_nonoverlapping_memory(ret.as_mut_ptr(),
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self.as_ptr(),
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mem::size_of::<$thing>());
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ret
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}
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}
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}
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2014-09-05 01:09:18 +00:00
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impl<D: ::serialize::Decoder<E>, E> ::serialize::Decodable<D, E> for $thing {
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fn decode(d: &mut D) -> ::std::prelude::Result<$thing, E> {
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use serialize::Decodable;
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::assert_type_is_copy::<$ty>();
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d.read_seq(|d, len| {
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if len != $len {
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Err(d.error("Invalid length"))
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} else {
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unsafe {
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use std::mem;
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let mut ret: [$ty, ..$len] = mem::uninitialized();
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for i in range(0, len) {
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ret[i] = try!(d.read_seq_elt(i, |d| Decodable::decode(d)));
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}
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Ok($thing(ret))
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}
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}
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})
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}
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}
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impl<E: ::serialize::Encoder<S>, S> ::serialize::Encodable<E, S> for $thing {
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fn encode(&self, e: &mut E) -> ::std::prelude::Result<(), S> {
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self.as_slice().encode(e)
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2014-09-05 01:21:09 +00:00
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}
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2014-09-05 01:09:18 +00:00
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}
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2014-08-27 17:19:10 +00:00
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}
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)
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2014-09-04 19:29:24 +00:00
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// for testing
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macro_rules! hex_slice(
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($s:expr) => (
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$s.from_hex().unwrap().as_slice()
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)
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)
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