155 lines
4.6 KiB
Rust
155 lines
4.6 KiB
Rust
// 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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// 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 Copy for $thing {}
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impl $thing {
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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 &mut $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) -> usize { $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[..] == &other[..]
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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;
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use std::mem;
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let mut ret: $thing = mem::uninitialized();
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copy_nonoverlapping(self.as_ptr(),
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ret.as_mut_ptr(),
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mem::size_of::<$thing>());
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ret
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}
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}
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}
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impl ::std::ops::Index<usize> for $thing {
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type Output = $ty;
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#[inline]
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fn index(&self, index: usize) -> &$ty {
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let &$thing(ref dat) = self;
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&dat[index]
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}
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}
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impl ::std::ops::Index<::std::ops::Range<usize>> for $thing {
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type Output = [$ty];
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#[inline]
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fn index(&self, index: ::std::ops::Range<usize>) -> &[$ty] {
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let &$thing(ref dat) = self;
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&dat[index.start..index.end]
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}
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}
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impl ::std::ops::Index<::std::ops::RangeTo<usize>> for $thing {
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type Output = [$ty];
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#[inline]
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fn index(&self, index: ::std::ops::RangeTo<usize>) -> &[$ty] {
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let &$thing(ref dat) = self;
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&dat[..index.end]
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}
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}
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impl ::std::ops::Index<::std::ops::RangeFrom<usize>> for $thing {
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type Output = [$ty];
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#[inline]
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fn index(&self, index: ::std::ops::RangeFrom<usize>) -> &[$ty] {
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let &$thing(ref dat) = self;
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&dat[index.start..]
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}
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}
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impl ::std::ops::Index<::std::ops::RangeFull> for $thing {
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type Output = [$ty];
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#[inline]
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fn index(&self, _: ::std::ops::RangeFull) -> &[$ty] {
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let &$thing(ref dat) = self;
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&dat[..]
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}
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}
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impl ::serialize::Decodable for $thing {
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fn decode<D: ::serialize::Decoder>(d: &mut D) -> ::std::result::Result<$thing, D::Error> {
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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; $len] = mem::uninitialized();
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for i in 0..len {
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ret[i] = try!(d.read_seq_elt(i, |d| Decodable::decode(d)));
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}
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Ok($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 ::serialize::Encodable for $thing {
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fn encode<S: ::serialize::Encoder>(&self, s: &mut S)
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-> ::std::result::Result<(), S::Error> {
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self[..].encode(s)
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}
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}
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}
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}
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// for testing
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macro_rules! hex_slice {
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($s:expr) => (
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&$s.from_hex().unwrap()[..]
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)
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}
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