Drop writer size hinting/message vec preallocation

[rust-lightning] / lightning / src / util / ser_macros.rs

diff --git a/lightning/src/util/ser_macros.rs b/lightning/src/util/ser_macros.rs
index 5178732c7457e93745d39319fa2f2ecee99a80dd..b229383b283ce1c35e53cf290214a46d2b6e7a2d 100644 (file)
--- a/lightning/src/util/ser_macros.rs
+++ b/lightning/src/util/ser_macros.rs
@@ -231,39 +231,18 @@ macro_rules! decode_tlv_stream {
 }
 
 macro_rules! impl_writeable {
-       ($st:ident, $len: expr, {$($field:ident),*}) => {
+       ($st:ident, {$($field:ident),*}) => {
                impl ::util::ser::Writeable for $st {
                        fn write<W: ::util::ser::Writer>(&self, w: &mut W) -> Result<(), $crate::io::Error> {
-                               if $len != 0 {
-                                       w.size_hint($len);
-                               }
-                               #[cfg(any(test, feature = "fuzztarget"))]
-                               {
-                                       // In tests, assert that the hard-coded length matches the actual one
-                                       if $len != 0 {
-                                               let mut len_calc = ::util::ser::LengthCalculatingWriter(0);
-                                               $( self.$field.write(&mut len_calc).expect("No in-memory data may fail to serialize"); )*
-                                               assert_eq!(len_calc.0, $len);
-                                               assert_eq!(self.serialized_length(), $len);
-                                       }
-                               }
                                $( self.$field.write(w)?; )*
                                Ok(())
                        }
 
                        #[inline]
                        fn serialized_length(&self) -> usize {
-                               if $len == 0 || cfg!(any(test, feature = "fuzztarget")) {
-                                       let mut len_calc = 0;
-                                       $( len_calc += self.$field.serialized_length(); )*
-                                       if $len != 0 {
-                                               // In tests, assert that the hard-coded length matches the actual one
-                                               assert_eq!(len_calc, $len);
-                                       } else {
-                                               return len_calc;
-                                       }
-                               }
-                               $len
+                               let mut len_calc = 0;
+                               $( len_calc += self.$field.serialized_length(); )*
+                               return len_calc;
                        }
                }
 
@@ -276,59 +255,6 @@ macro_rules! impl_writeable {
                }
        }
 }
-macro_rules! impl_writeable_len_match {
-       ($struct: ident, $cmp: tt, ($calc_len: expr), {$({$match: pat, $length: expr}),*}, {$($field:ident),*}) => {
-               impl Writeable for $struct {
-                       fn write<W: Writer>(&self, w: &mut W) -> Result<(), $crate::io::Error> {
-                               let len = match *self {
-                                       $($match => $length,)*
-                               };
-                               w.size_hint(len);
-                               #[cfg(any(test, feature = "fuzztarget"))]
-                               {
-                                       // In tests, assert that the hard-coded length matches the actual one
-                                       let mut len_calc = ::util::ser::LengthCalculatingWriter(0);
-                                       $( self.$field.write(&mut len_calc).expect("No in-memory data may fail to serialize"); )*
-                                       assert!(len_calc.0 $cmp len);
-                                       assert_eq!(len_calc.0, self.serialized_length());
-                               }
-                               $( self.$field.write(w)?; )*
-                               Ok(())
-                       }
-
-                       #[inline]
-                       fn serialized_length(&self) -> usize {
-                               if $calc_len || cfg!(any(test, feature = "fuzztarget")) {
-                                       let mut len_calc = 0;
-                                       $( len_calc += self.$field.serialized_length(); )*
-                                       if !$calc_len {
-                                               assert_eq!(len_calc, match *self {
-                                                       $($match => $length,)*
-                                               });
-                                       }
-                                       return len_calc
-                               }
-                               match *self {
-                                       $($match => $length,)*
-                               }
-                       }
-               }
-
-               impl ::util::ser::Readable for $struct {
-                       fn read<R: $crate::io::Read>(r: &mut R) -> Result<Self, DecodeError> {
-                               Ok(Self {
-                                       $($field: Readable::read(r)?),*
-                               })
-                       }
-               }
-       };
-       ($struct: ident, $cmp: tt, {$({$match: pat, $length: expr}),*}, {$($field:ident),*}) => {
-               impl_writeable_len_match!($struct, $cmp, (true), { $({ $match, $length }),* }, { $($field),* });
-       };
-       ($struct: ident, {$({$match: pat, $length: expr}),*}, {$($field:ident),*}) => {
-               impl_writeable_len_match!($struct, ==, (false), { $({ $match, $length }),* }, { $($field),* });
-       }
-}
 
 /// Write out two bytes to indicate the version of an object.
 /// $this_version represents a unique version of a type. Incremented whenever the type's