Crate 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

Modules

iter

Structs

RangeError

used by memcpy()

Functions

memchr

This mimics libc::memchr(), same as buf.iter().position(|&x| x == by1).

memchr_dbl

This is same as buf.iter().position(|&x| x == by1 || x == by2).

memchr_qpl

This is same as buf.iter().position(|&x| x == by1 || x == by2 || x == by3 || x == by4).

memchr_tpl

This is same as buf.iter().position(|&x| x == by1 || x == by2 || x == by3).

memcmp

This mimics libc::memcmp(), same as a.cmp(&b).

memcpy

This mimics libc::memcpy(), same as dst = src.

memeq

This mimics libc::bcmp(), same as a == b.

memmem

This mimics libc::memmem(), same as (haystack as &str).find(needle as &str) or haystack.windows(needle.len()).position(|window| window == needle).

memnechr

This is same as buf.iter().position(|&x| x != by1), not included libc.

memnechr_dbl

This is same as buf.iter().position(|&x| x != by1 && x != by2), not included libc.

memnechr_qpl

This is same as buf.iter().position(|&x| x != by1 && x != by2 && x != by3 && x != by4), not included libc.

memnechr_tpl

This is same as buf.iter().position(|&x| x != by1 && x != by2 && x != by3), not included libc.

memrchr

This mimics libc::memrchr(), same as buf.iter().rposition(|&x| x == by1).

memrchr_dbl

This is same as buf.iter().rposition(|&x| x == by1 || x == by2).

memrchr_qpl

This is same as buf.iter().rposition(|&x| x == by1 || x == by2 || x == by3 || x == by4).

memrchr_tpl

This is same as buf.iter().rposition(|&x| x == by1 || x == by2 || x == by3).

memrmem

This mimics libc::memrmem(), same as (haystack as &str).rfind(needle as &str) or haystack.windows(needle.len()).rposition(|window| window == needle).

memrnechr

This is same as buf.iter().rposition(|&x| x != by1), not included libc.

memrnechr_dbl

This is same as buf.iter().rposition(|&x| x != by1 && x != by2), not included libc.

memrnechr_qpl

This is same as buf.iter().rposition(|&x| x != by1 && x != by2 && x != by3 && x != by4), not included libc.

memrnechr_tpl

This is same as buf.iter().rposition(|&x| x != by1 && x != by2 && x != by3), not included libc.

memset

This mimics libc::memset(), same as buf.fill(c).