From 9581fe293b763ecf22e1bfc6bc6dfa55f5000679 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20S=C3=A1=20de=20Mello?= <codasm@pm.me>
Date: Mon, 1 Jul 2024 19:20:14 +0100
Subject: [PATCH] remove unsafe helper

---
 src/pointer.rs | 18 ++++--------------
 1 file changed, 4 insertions(+), 14 deletions(-)

diff --git a/src/pointer.rs b/src/pointer.rs
index aa3909a..b8501e2 100644
--- a/src/pointer.rs
+++ b/src/pointer.rs
@@ -4,7 +4,7 @@ use alloc::{
     string::{String, ToString},
     vec::Vec,
 };
-use core::{borrow::Borrow, cmp::Ordering, ops::Deref, slice, str::FromStr};
+use core::{borrow::Borrow, cmp::Ordering, ops::Deref, str::FromStr};
 
 /*
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@@ -171,14 +171,11 @@ impl Pointer {
             return None;
         }
         self.0[1..]
-            .split_once('/')
+            .find('/')
             .map_or_else(
                 || (Token::from_encoded_unchecked(&self.0[1..]), Self::root()),
-                |(front, back)| {
-                    // We want to include the delimiter character too!
-                    // SAFETY: if split was successful, then the delimiter
-                    // character exists before the start of the second `str`.
-                    let back = unsafe { extend_one_before(back) };
+                |idx| {
+                    let (front, back) = self.0[1..].split_at(idx);
                     (Token::from_encoded_unchecked(front), Self::new(back))
                 },
             )
@@ -848,13 +845,6 @@ const fn validate(value: &str) -> Result<&str, ParseError> {
     Ok(value)
 }
 
-unsafe fn extend_one_before(s: &str) -> &str {
-    let ptr = s.as_ptr().offset(-1);
-    let len = s.len() + 1;
-    let slice = slice::from_raw_parts(ptr, len);
-    core::str::from_utf8_unchecked(slice)
-}
-
 /*
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