remove SmallVec

base58/src/lib.rs

@@ -31,7 +31,7 @@ pub mod error;
 
 #[cfg(not(feature = "std"))]
 pub use alloc::{string::String, vec::Vec};
-use core::{fmt, iter, slice, str};
+use core::{fmt, str};
 #[cfg(feature = "std")]
 pub use std::{string::String, vec::Vec};
 
@@ -118,7 +118,9 @@ pub fn decode_check(data: &str) -> Result<Vec<u8>, Error> {
 }
 
 /// Encodes `data` as a base58 string (see also `base58::encode_check()`).
-pub fn encode(data: &[u8]) -> String { encode_iter(data.iter().cloned()) }
+pub fn encode(data: &[u8]) -> String {
+    encode_iter(data.iter().cloned())
+}
 
 /// Encodes `data` as a base58 string including the checksum.
 ///
@@ -151,7 +153,7 @@ where
     I: Iterator<Item = u8> + Clone,
     W: fmt::Write,
 {
-    let mut ret = SmallVec::new();
+    let mut ret = Vec::with_capacity(128);
 
     let mut leading_zero_count = 0;
     let mut leading_zeroes = true;
@@ -187,37 +189,6 @@ where
     Ok(())
 }
 
-/// Vector-like object that holds the first 100 elements on the stack. If more space is needed it
-/// will be allocated on the heap.
-struct SmallVec<T> {
-    len: usize,
-    stack: [T; 100],
-    heap: Vec<T>,
-}
-
-impl<T: Default + Copy> SmallVec<T> {
-    fn new() -> SmallVec<T> { SmallVec { len: 0, stack: [T::default(); 100], heap: Vec::new() } }
-
-    fn push(&mut self, val: T) {
-        if self.len < 100 {
-            self.stack[self.len] = val;
-            self.len += 1;
-        } else {
-            self.heap.push(val);
-        }
-    }
-
-    fn iter(&self) -> iter::Chain<slice::Iter<T>, slice::Iter<T>> {
-        // If len<100 then we just append an empty vec
-        self.stack[0..self.len].iter().chain(self.heap.iter())
-    }
-
-    fn iter_mut(&mut self) -> iter::Chain<slice::IterMut<T>, slice::IterMut<T>> {
-        // If len<100 then we just append an empty vec
-        self.stack[0..self.len].iter_mut().chain(self.heap.iter_mut())
-    }
-}
-
 #[cfg(test)]
 mod tests {
     use hex::test_hex_unwrap as hex;
@@ -288,7 +259,6 @@ mod tests {
     }
 }
 
-
 #[cfg(bench)]
 mod benches {
     use test::{black_box, Bencher};
@@ -312,5 +282,4 @@ mod benches {
             black_box(&r);
         });
     }
-
 }