24 lines
688 B
Rust
24 lines
688 B
Rust
// Original implementation taken from rust-memchr.
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// Copyright 2015 Andrew Gallant, bluss and Nicolas Koch
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pub fn memchr(needle: u8, haystack: &[u8]) -> Option<usize> {
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let p = unsafe {
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libc::memchr(
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haystack.as_ptr() as *const libc::c_void,
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needle as libc::c_int,
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haystack.len())
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};
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if p.is_null() {
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None
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} else {
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Some(p as usize - (haystack.as_ptr() as usize))
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}
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}
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pub fn memrchr(needle: u8, haystack: &[u8]) -> Option<usize> {
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fn memrchr_specific(needle: u8, haystack: &[u8]) -> Option<usize> {
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core::slice::memchr::memrchr(needle, haystack)
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}
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memrchr_specific(needle, haystack)
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}
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