rust-bitcoin-unsafe-fast/src/internal_macros.rs

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// Rust Bitcoin Library
// Written in 2014 by
// Andrew Poelstra <apoelstra@wpsoftware.net>
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//
// To the extent possible under law, the author(s) have dedicated all
// copyright and related and neighboring rights to this software to
// the public domain worldwide. This software is distributed without
// any warranty.
//
// You should have received a copy of the CC0 Public Domain Dedication
// along with this software.
// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>.
//
macro_rules! impl_consensus_encoding {
($thing:ident, $($field:ident),+) => (
impl<S: ::consensus::encode::Encoder> ::consensus::encode::Encodable<S> for $thing {
#[inline]
fn consensus_encode(&self, s: &mut S) -> Result<(), ::consensus::encode::Error> {
$( self.$field.consensus_encode(s)?; )+
Ok(())
}
}
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impl<D: ::consensus::encode::Decoder> ::consensus::encode::Decodable<D> for $thing {
#[inline]
fn consensus_decode(d: &mut D) -> Result<$thing, ::consensus::encode::Error> {
use consensus::encode::Decodable;
Ok($thing {
$( $field: Decodable::consensus_decode(d)?, )+
})
}
}
);
}
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macro_rules! impl_newtype_consensus_encoding {
($thing:ident) => (
impl<S: ::consensus::encode::Encoder> ::consensus::encode::Encodable<S> for $thing {
#[inline]
fn consensus_encode(&self, s: &mut S) -> Result<(), ::consensus::encode::Error> {
let &$thing(ref data) = self;
data.consensus_encode(s)
}
}
impl<D: ::consensus::encode::Decoder> ::consensus::encode::Decodable<D> for $thing {
#[inline]
fn consensus_decode(d: &mut D) -> Result<$thing, ::consensus::encode::Error> {
Ok($thing(Decodable::consensus_decode(d)?))
}
}
);
}
macro_rules! impl_array_newtype {
($thing:ident, $ty:ty, $len:expr) => {
impl $thing {
#[inline]
/// Converts the object to a raw pointer
pub fn as_ptr(&self) -> *const $ty {
let &$thing(ref dat) = self;
dat.as_ptr()
}
#[inline]
/// Converts the object to a mutable raw pointer
pub fn as_mut_ptr(&mut self) -> *mut $ty {
let &mut $thing(ref mut dat) = self;
dat.as_mut_ptr()
}
#[inline]
/// Returns the length of the object as an array
pub fn len(&self) -> usize { $len }
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#[inline]
/// Returns whether the object, as an array, is empty. Always false.
pub fn is_empty(&self) -> bool { false }
#[inline]
/// Returns the underlying bytes.
pub fn as_bytes(&self) -> &[$ty; $len] { &self.0 }
#[inline]
/// Returns the underlying bytes.
pub fn to_bytes(&self) -> [$ty; $len] { self.0.clone() }
#[inline]
/// Returns the underlying bytes.
pub fn into_bytes(self) -> [$ty; $len] { self.0 }
}
impl<'a> From<&'a [$ty]> for $thing {
fn from(data: &'a [$ty]) -> $thing {
assert_eq!(data.len(), $len);
let mut ret = [0; $len];
ret.copy_from_slice(&data[..]);
$thing(ret)
}
}
impl ::std::ops::Index<usize> for $thing {
type Output = $ty;
#[inline]
fn index(&self, index: usize) -> &$ty {
let &$thing(ref dat) = self;
&dat[index]
}
}
impl_index_newtype!($thing, $ty);
impl PartialEq for $thing {
#[inline]
fn eq(&self, other: &$thing) -> bool {
&self[..] == &other[..]
}
}
impl Eq for $thing {}
impl PartialOrd for $thing {
#[inline]
fn partial_cmp(&self, other: &$thing) -> Option<::std::cmp::Ordering> {
Some(self.cmp(&other))
}
}
impl Ord for $thing {
#[inline]
fn cmp(&self, other: &$thing) -> ::std::cmp::Ordering {
// manually implement comparison to get little-endian ordering
// (we need this for our numeric types; non-numeric ones shouldn't
// be ordered anyway except to put them in BTrees or whatever, and
// they don't care how we order as long as we're consisistent).
for i in 0..$len {
if self[$len - 1 - i] < other[$len - 1 - i] { return ::std::cmp::Ordering::Less; }
if self[$len - 1 - i] > other[$len - 1 - i] { return ::std::cmp::Ordering::Greater; }
}
::std::cmp::Ordering::Equal
}
}
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#[cfg_attr(feature = "clippy", allow(expl_impl_clone_on_copy))] // we don't define the `struct`, we have to explicitly impl
impl Clone for $thing {
#[inline]
fn clone(&self) -> $thing {
$thing::from(&self[..])
}
}
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impl Copy for $thing {}
impl ::std::hash::Hash for $thing {
#[inline]
fn hash<H>(&self, state: &mut H)
where H: ::std::hash::Hasher
{
(&self[..]).hash(state);
}
fn hash_slice<H>(data: &[$thing], state: &mut H)
where H: ::std::hash::Hasher
{
for d in data.iter() {
(&d[..]).hash(state);
}
}
}
impl ::rand::Rand for $thing {
#[inline]
fn rand<R: ::rand::Rng>(r: &mut R) -> $thing {
$thing(::rand::Rand::rand(r))
}
}
}
}
macro_rules! impl_array_newtype_encodable {
($thing:ident, $ty:ty, $len:expr) => {
#[cfg(feature = "serde")]
impl<'de> $crate::serde::Deserialize<'de> for $thing {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: $crate::serde::Deserializer<'de>,
{
use $crate::std::fmt::{self, Formatter};
struct Visitor;
impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
type Value = $thing;
fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
formatter.write_str("a fixed size array")
}
#[inline]
fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
where
A: $crate::serde::de::SeqAccess<'de>,
{
let mut ret: [$ty; $len] = [0; $len];
for item in ret.iter_mut() {
*item = match seq.next_element()? {
Some(c) => c,
None => return Err($crate::serde::de::Error::custom("end of stream"))
};
}
Ok($thing(ret))
}
}
deserializer.deserialize_seq(Visitor)
}
}
#[cfg(feature = "serde")]
impl $crate::serde::Serialize for $thing {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: $crate::serde::Serializer,
{
let &$thing(ref dat) = self;
(&dat[..]).serialize(serializer)
}
}
}
}
macro_rules! impl_array_newtype_show {
($thing:ident) => {
impl ::std::fmt::Debug for $thing {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> ::std::fmt::Result {
write!(f, concat!(stringify!($thing), "({:?})"), &self[..])
}
}
}
}
macro_rules! impl_index_newtype {
($thing:ident, $ty:ty) => {
impl ::std::ops::Index<::std::ops::Range<usize>> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, index: ::std::ops::Range<usize>) -> &[$ty] {
&self.0[index]
}
}
impl ::std::ops::Index<::std::ops::RangeTo<usize>> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, index: ::std::ops::RangeTo<usize>) -> &[$ty] {
&self.0[index]
}
}
impl ::std::ops::Index<::std::ops::RangeFrom<usize>> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, index: ::std::ops::RangeFrom<usize>) -> &[$ty] {
&self.0[index]
}
}
impl ::std::ops::Index<::std::ops::RangeFull> for $thing {
type Output = [$ty];
#[inline]
fn index(&self, _: ::std::ops::RangeFull) -> &[$ty] {
&self.0[..]
}
}
}
}
macro_rules! display_from_debug {
($thing:ident) => {
impl ::std::fmt::Display for $thing {
fn fmt(&self, f: &mut ::std::fmt::Formatter) -> Result<(), ::std::fmt::Error> {
::std::fmt::Debug::fmt(self, f)
}
}
}
}
#[cfg(test)]
macro_rules! hex_script (($s:expr) => (::blockdata::script::Script::from(::hex::decode($s).unwrap())));
#[cfg(test)]
macro_rules! hex_hash (($s:expr) => (::util::hash::Sha256dHash::from(&::hex::decode($s).unwrap()[..])));
macro_rules! serde_struct_impl {
($name:ident, $($fe:ident),*) => (
#[cfg(feature = "serde")]
impl<'de> $crate::serde::Deserialize<'de> for $name {
fn deserialize<D>(deserializer: D) -> Result<$name, D::Error>
where
D: $crate::serde::de::Deserializer<'de>,
{
use $crate::std::fmt::{self, Formatter};
use $crate::serde::de::IgnoredAny;
#[allow(non_camel_case_types)]
enum Enum { Unknown__Field, $($fe),* }
struct EnumVisitor;
impl<'de> $crate::serde::de::Visitor<'de> for EnumVisitor {
type Value = Enum;
fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
formatter.write_str("a field name")
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: $crate::serde::de::Error,
{
match v {
$(
stringify!($fe) => Ok(Enum::$fe)
),*,
_ => Ok(Enum::Unknown__Field)
}
}
}
impl<'de> $crate::serde::Deserialize<'de> for Enum {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: ::serde::de::Deserializer<'de>,
{
deserializer.deserialize_str(EnumVisitor)
}
}
struct Visitor;
impl<'de> $crate::serde::de::Visitor<'de> for Visitor {
type Value = $name;
fn expecting(&self, formatter: &mut Formatter) -> fmt::Result {
formatter.write_str("a struct")
}
fn visit_map<A>(self, mut map: A) -> Result<Self::Value, A::Error>
where
A: $crate::serde::de::MapAccess<'de>,
{
use $crate::serde::de::Error;
$(let mut $fe = None;)*
loop {
match map.next_key::<Enum>()? {
Some(Enum::Unknown__Field) => {
map.next_value::<IgnoredAny>()?;
}
$(
Some(Enum::$fe) => {
$fe = Some(map.next_value()?);
}
)*
None => { break; }
}
}
$(
let $fe = match $fe {
Some(x) => x,
None => return Err(A::Error::missing_field(stringify!($fe))),
};
)*
let ret = $name {
$($fe: $fe),*
};
Ok(ret)
}
}
// end type defs
static FIELDS: &'static [&'static str] = &[$(stringify!($fe)),*];
deserializer.deserialize_struct(stringify!($name), FIELDS, Visitor)
}
}
#[cfg(feature = "serde")]
impl<'de> $crate::serde::Serialize for $name {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: $crate::serde::Serializer,
{
use $crate::serde::ser::SerializeStruct;
// Only used to get the struct length.
static FIELDS: &'static [&'static str] = &[$(stringify!($fe)),*];
let mut st = serializer.serialize_struct(stringify!($name), FIELDS.len())?;
$(
st.serialize_field(stringify!($fe), &self.$fe)?;
)*
st.end()
}
}
)
}