forked from lix-project/lix
Speed up StorePath::to_string()
1.81% -> 0.56%
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f64b58b45e
commit
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@ -1,6 +1,7 @@
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use super::{
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error,
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foreign::{self, CBox},
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store::path,
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store::StorePath,
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util,
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};
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@ -53,8 +54,12 @@ pub unsafe extern "C" fn ffi_StorePath_drop(self_: *mut StorePath) {
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}
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#[no_mangle]
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pub extern "C" fn ffi_StorePath_to_string(self_: &StorePath) -> String {
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format!("{}", self_)
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pub extern "C" fn ffi_StorePath_to_string(self_: &StorePath) -> Vec<u8> {
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let mut buf = vec![0; path::STORE_PATH_HASH_CHARS + 1 + self_.name.name().len()];
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util::base32::encode_into(self_.hash.hash(), &mut buf[0..path::STORE_PATH_HASH_CHARS]);
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buf[path::STORE_PATH_HASH_CHARS] = b'-';
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buf[path::STORE_PATH_HASH_CHARS + 1..].clone_from_slice(self_.name.name().as_bytes());
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buf
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}
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#[no_mangle]
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@ -70,7 +70,9 @@ impl StorePathHash {
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impl fmt::Display for StorePathHash {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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f.write_str(&base32::encode(&self.0))
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let mut buf = vec![0; STORE_PATH_HASH_CHARS];
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base32::encode_into(&self.0, &mut buf);
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f.write_str(std::str::from_utf8(&buf).unwrap())
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}
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}
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@ -25,27 +25,36 @@ lazy_static! {
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}
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pub fn encode(input: &[u8]) -> String {
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let mut res = String::new();
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res.reserve(encoded_len(input.len()));
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let mut buf = vec![0; encoded_len(input.len())];
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encode_into(input, &mut buf);
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std::str::from_utf8(&buf).unwrap().to_string()
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}
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pub fn encode_into(input: &[u8], output: &mut [u8]) {
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let len = encoded_len(input.len());
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assert_eq!(len, output.len());
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let mut nr_bits_left: usize = 0;
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let mut bits_left: u16 = 0;
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let mut pos = len;
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for b in input {
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bits_left |= (*b as u16) << nr_bits_left;
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nr_bits_left += 8;
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while nr_bits_left > 5 {
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res.push(BASE32_CHARS[(bits_left & 0x1f) as usize] as char);
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output[pos - 1] = BASE32_CHARS[(bits_left & 0x1f) as usize];
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pos -= 1;
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bits_left >>= 5;
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nr_bits_left -= 5;
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}
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}
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if nr_bits_left > 0 {
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res.push(BASE32_CHARS[(bits_left & 0x1f) as usize] as char);
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output[pos - 1] = BASE32_CHARS[(bits_left & 0x1f) as usize];
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pos -= 1;
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}
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res.chars().rev().collect()
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assert_eq!(pos, 0);
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}
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pub fn decode(input: &str) -> Result<Vec<u8>, crate::Error> {
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