Lib.rs

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#memcmp #memchr #memmem

memx

memory functions like libc memcmp(), memchr(), memmem(), memcpy(), memset()

by aki

31 releases

0.1.32	Jun 19, 2024
0.1.30	May 15, 2023
0.1.28	Mar 14, 2023
0.1.21	Jun 13, 2022
0.1.14	Jul 6, 2021

#62 in Algorithms

4,003 downloads per month
Used in 19 crates (4 directly)

MIT/Apache

1MB
22K SLoC

memx

memx minics libc.

This crate is implemented memory functions like libc memcmp(), memchr(), memmem(), memcpy(), memset().

Features

Rewriting with rust lang.
minimum support rustc 1.56.1 (59eed8a2a 2021-11-01)

Todo

Support the zero overhead trait.
Support more fast routine on armv7-android
Support more fast routine on x86_64
Support #![no_std]

Support status of miri :: rustc 1.68.0-nightly (77429957a 2023-01-01)

Ok lists:

cargo +nightly miri test --target=x86_64-unknown-linux-gnu
cargo +nightly miri test --target=i686-unknown-linux-gnu
cargo +nightly miri test --target=i586-unknown-linux-gnu
cargo +nightly miri test --target=aarch64-unknown-linux-gnu
cargo +nightly miri test --target=armv7-unknown-linux-gnueabihf

Failed lists:

nothing

Benchmark results

forward search	backward search
`memchr()`	`memrchr()`
`memnechr()`	`memrnechr()`
`memmem()`	`memrmem()`

`memchr_dbl()`	`memrchr_dbl()`
`memchr_tpl()`	`memrchr_tpl()`
`memchr_qpl()`	`memrchr_qpl()`

`memnechr_dbl()`	`memrnechr_dbl()`
`memnechr_tpl()`	`memrnechr_tpl()`
`memnechr_qpl()`	`memrnechr_qpl()`

memory op
`memcmp()`
`memeq()`
`memcpy()`
`memset()`

Changelogs

This crate's changelog here.

License

This project is licensed under either of

Apache License, Version 2.0, (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)

at your option.

Dependencies