Replace unsafe with new std API (#4178)

* Replace unsafe with new std API

* bump

* Fix link in readme

---------

Co-authored-by: Dániel Buga <[email protected]>

Author: Dominaezzz

esp-bootloader-esp-idf/Cargo.toml

@@ -2,7 +2,7 @@
 name = "esp-bootloader-esp-idf"
 version = "0.2.0"
 edition = "2024"
-rust-version = "1.86.0"
+rust-version = "1.88.0"
 description = "Functionality related to the esp-idf bootloader"
 documentation = "https://docs.espressif.com/projects/rust/esp-bootloader-esp-idf/latest/"
 keywords = ["esp32", "espressif", "no-std"]

esp-bootloader-esp-idf/README.md

@@ -2,7 +2,7 @@
 
 [![Crates.io](https://img.shields.io/crates/v/esp-bootloader-esp-idf?labelColor=1C2C2E&color=C96329&logo=Rust&style=flat-square)](https://crates.io/crates/esp-bootloader-esp-idf)
 [![docs.rs](https://img.shields.io/docsrs/esp-bootloader-esp-idf?labelColor=1C2C2E&color=C96329&logo=rust&style=flat-square)](https://docs.espressif.com/projects/rust/esp-bootloader-esp-idf/latest/)
-![MSRV](https://img.shields.io/badge/MSRV-1.86.0-blue?labelColor=1C2C2E&style=flat-square)
+![MSRV](https://img.shields.io/badge/MSRV-1.88.0-blue?labelColor=1C2C2E&style=flat-square)
 ![Crates.io](https://img.shields.io/crates/l/esp-bootloader-esp-idf?labelColor=1C2C2E&style=flat-square)
 [![Matrix](https://img.shields.io/matrix/esp-rs:matrix.org?label=join%20matrix&labelColor=1C2C2E&color=BEC5C9&logo=matrix&style=flat-square)](https://matrix.to/#/#esp-rs:matrix.org)
 

esp-bootloader-esp-idf/src/partitions.rs

@@ -199,7 +199,8 @@ impl<'a> PartitionTable<'a> {
             return Err(Error::Invalid);
         }
 
-        if binary.len() % RAW_ENTRY_LEN != 0 {
+        let (binary, rem) = binary.as_chunks::<RAW_ENTRY_LEN>();
+        if !rem.is_empty() {
             return Err(Error::Invalid);
         }
 
@@ -210,14 +211,6 @@ impl<'a> PartitionTable<'a> {
             });
         }
 
-        // we checked binary before
-        let binary = unsafe {
-            core::slice::from_raw_parts(
-                binary.as_ptr() as *const [u8; RAW_ENTRY_LEN],
-                binary.len() / RAW_ENTRY_LEN,
-            )
-        };
-
         let mut raw_table = Self {
             binary,
             entries: binary.len(),