From ff898fc9b34d5f1a22463f56d1420e29aea8e6be Mon Sep 17 00:00:00 2001
From: Avril <flanchan@cumallover.me>
Date: Mon, 1 Apr 2024 15:24:16 +0100
Subject: [PATCH] Added feature `mapped-file`: Attempt to `mmap()` input where
 possible to avoid reads. (NOTE: This should be replaced with a
 cfg-target-unix check, for now it is a default feature that can be disabled.)
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Started module `part`: Partitioning of memory areas (halve-then-`{r,m}emchr("\n")` pivot calculation) (parallelised via rayon + crossbeam-queue (+maybe tokio_uring?) if `threads` feature enabled.

Fortune for reverse's current commit: Middle blessing − 中吉
---
 Cargo.toml  | 6 ++----
 src/main.rs | 2 ++
 src/part.rs | 3 +++
 3 files changed, 7 insertions(+), 4 deletions(-)
 create mode 100644 src/part.rs

diff --git a/Cargo.toml b/Cargo.toml
index 35d4339..ac9d24c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -7,7 +7,7 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [features]
-default = []
+default = ["mapped-file"]
 
 unstable = ["parking_lot?/nightly", "memchr/compiler_builtins", "crossbeam-queue?/nightly", "futures?/unstable", "color-eyre/track-caller"]
 
@@ -32,9 +32,7 @@ threads-async = ["threads", "dep:futures", "dep:tokio-uring", "dep:tokio-stream"
 
 #XXX ["output-lines", "buffer-output", "ignore-output-errors", "ignore-invalid-args"]
 
-#TODO: Branch repo, and begin refactor:
-#
-#TODO: Move these features to Clap runtime arg parse options; Major refactor, bump to 0.5.0 or to 1.0.0[r0]
+#TODO: Move these features to Clap runtime arg parse options.
 
 #TODO: Add feature 'mapped-file': Attempt to map input file and process data backwards from end if possible.
 #TODO: Add feature 'threads': Use rayon to parallelise line-searching in buffer (or mapped file ^) (partition in half, move partition line to closest {r,}memchr('\n'); repeat N times recursively on each side (parallel) where N is number of logical CPU cores and/or to get the chunks below/in a certain size range. 
diff --git a/src/main.rs b/src/main.rs
index 53b824c..144838a 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,6 @@
 
+mod part;
+
 //#[inline] 
 fn reverse<T>(slice: &mut [T])
 {
diff --git a/src/part.rs b/src/part.rs
new file mode 100644
index 0000000..d003187
--- /dev/null
+++ b/src/part.rs
@@ -0,0 +1,3 @@
+//! Partitioning even areas by delimitor byte.
+use super::*;
+