find_byte.rs - source

Files

aho_corasick

packed

teddy

compile.rs mod.rs runtime.rs

api.rs mod.rs pattern.rs rabinkarp.rs vector.rs

ahocorasick.rs automaton.rs buffer.rs byte_frequencies.rs classes.rs dfa.rs error.rs lib.rs nfa.rs prefilter.rs state_id.rs

anyhow

backtrace.rs chain.rs context.rs error.rs fmt.rs kind.rs lib.rs macros.rs ptr.rs wrapper.rs

drone_config

config.rs format.rs lib.rs

drone_core

bitfield

ffi

c_str.rs c_string.rs libc.rs mod.rs

fib

chain.rs closure.rs future.rs generator.rs mod.rs stream_pulse.rs stream_ring.rs

heap

allocator.rs mod.rs pool.rs

io

mod.rs read.rs seek.rs write.rs

log

macros.rs mod.rs port.rs

reg

field.rs marker.rs mod.rs prelude.rs tag.rs

sync

spsc

oneshot

mod.rs receiver.rs sender.rs

pulse

mod.rs receiver.rs sender.rs

ring

mod.rs receiver.rs sender.rs

linked_list.rs mod.rs mutex.rs

thr

soft

exec.rs mod.rs prelude.rs

inventory.rs lang_items.rs lib.rs mem.rs periph.rs prelude.rs proc_loop.rs token.rs

drone_core_macros

bitfield.rs config_override.rs heap.rs lib.rs log_baud_rate.rs periph.rs periph_map.rs periph_singular.rs reg.rs reg_assert_taken.rs reg_tokens.rs reg_tokens_inner.rs simple_token.rs simple_tokens.rs static_tokens.rs thr_pool.rs thr_soft.rs

drone_ctypes

drone_macros_core

cfg_cond.rs lib.rs macros.rs unkeywordize.rs

futures

futures_channel

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task

__internal

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futures_io

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futures_sink

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futures_util

async_await

join_mod.rs mod.rs pending.rs poll.rs select_mod.rs

future

lock

bilock.rs mod.rs

sink

buffer.rs close.rs drain.rs err_into.rs fanout.rs feed.rs flush.rs map_err.rs mod.rs send.rs send_all.rs unfold.rs with.rs with_flat_map.rs

stream

task

mod.rs spawn.rs

fns.rs lib.rs never.rs unfold_state.rs

if_chain

inflector

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string

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suffix

foreignkey

lazy_static

inline_lazy.rs lib.rs

memchr

x86

avx.rs mod.rs sse2.rs

fallback.rs iter.rs lib.rs naive.rs

pin_project_lite

pin_utils

lib.rs projection.rs stack_pin.rs

proc_macro2

detection.rs fallback.rs lib.rs marker.rs parse.rs wrapper.rs

proc_macro_hack

error.rs iter.rs lib.rs parse.rs quote.rs

proc_macro_nested

quote

ext.rs format.rs ident_fragment.rs lib.rs runtime.rs spanned.rs to_tokens.rs

regex

regex_syntax

serde

de

ignored_any.rs impls.rs mod.rs seed.rs utf8.rs value.rs

private

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ser

fmt.rs impls.rs impossible.rs mod.rs

integer128.rs lib.rs macros.rs

serde_derive

internals

ast.rs attr.rs case.rs check.rs ctxt.rs mod.rs receiver.rs respan.rs symbol.rs

bound.rs de.rs dummy.rs fragment.rs lib.rs pretend.rs ser.rs try.rs

syn

toml

datetime.rs de.rs lib.rs macros.rs map.rs ser.rs spanned.rs tokens.rs value.rs

typenum

array.rs bit.rs int.rs lib.rs marker_traits.rs operator_aliases.rs private.rs type_operators.rs uint.rs

unicode_xid

lib.rs tables.rs

/// Searches for the given needle in the given haystack.
///
/// If the perf-literal feature is enabled, then this uses the super optimized
/// memchr crate. Otherwise, it uses the naive byte-at-a-time implementation.
pub fn find_byte(needle: u8, haystack: &[u8]) -> Option<usize> {
    #[cfg(not(feature = "perf-literal"))]
    fn imp(needle: u8, haystack: &[u8]) -> Option<usize> {
        haystack.iter().position(|&b| b == needle)
    }

    #[cfg(feature = "perf-literal")]
    fn imp(needle: u8, haystack: &[u8]) -> Option<usize> {
        use memchr::memchr;
        memchr(needle, haystack)
    }

    imp(needle, haystack)
}