refactor: prepare for no-std (#39)

Author: anonrig

src/ffi.rs

@@ -1,5 +1,5 @@
 #![allow(non_camel_case_types)]
-use std::ffi::{c_char, c_uint};
+use core::ffi::{c_char, c_uint};
 
 #[repr(C)]
 pub struct ada_url {
@@ -16,8 +16,8 @@ pub struct ada_string {
 impl ada_string {
     pub fn as_str(&self) -> &'static str {
         unsafe {
-            let slice = std::slice::from_raw_parts(self.data.cast(), self.length);
-            std::str::from_utf8_unchecked(slice)
+            let slice = core::slice::from_raw_parts(self.data.cast(), self.length);
+            core::str::from_utf8_unchecked(slice)
         }
     }
 }
@@ -31,8 +31,8 @@ pub struct ada_owned_string {
 impl AsRef<str> for ada_owned_string {
     fn as_ref(&self) -> &str {
         unsafe {
-            let slice = std::slice::from_raw_parts(self.data.cast(), self.length);
-            std::str::from_utf8_unchecked(slice)
+            let slice = core::slice::from_raw_parts(self.data.cast(), self.length);
+            core::str::from_utf8_unchecked(slice)
         }
     }
 }

src/idna.rs

@@ -18,8 +18,8 @@ impl Idna {
     pub fn unicode(input: &str) -> &str {
         unsafe {
             let out = ffi::ada_idna_to_unicode(input.as_ptr().cast(), input.len());
-            let slice = std::slice::from_raw_parts(out.data.cast(), out.length);
-            std::str::from_utf8_unchecked(slice)
+            let slice = core::slice::from_raw_parts(out.data.cast(), out.length);
+            core::str::from_utf8_unchecked(slice)
         }
     }
 
@@ -35,8 +35,8 @@ impl Idna {
     pub fn ascii(input: &str) -> &str {
         unsafe {
             let out = ffi::ada_idna_to_ascii(input.as_ptr().cast(), input.len());
-            let slice = std::slice::from_raw_parts(out.data.cast(), out.length);
-            std::str::from_utf8_unchecked(slice)
+            let slice = core::slice::from_raw_parts(out.data.cast(), out.length);
+            core::str::from_utf8_unchecked(slice)
         }
     }
 }

src/lib.rs

@@ -35,10 +35,9 @@ pub mod ffi;
 mod idna;
 pub use idna::Idna;
 
+use core::{borrow, ffi::c_uint, fmt, hash, ops};
 use derive_more::{Display, Error};
-use std::{borrow, fmt, hash, ops, os::raw::c_uint};
 
-extern crate alloc;
 #[cfg(feature = "serde")]
 extern crate serde;
 
@@ -229,8 +228,8 @@ impl Url {
     pub fn origin(&self) -> &str {
         unsafe {
             let out = ffi::ada_get_origin(self.0);
-            let slice = std::slice::from_raw_parts(out.data.cast(), out.length);
-            std::str::from_utf8_unchecked(slice)
+            let slice = core::slice::from_raw_parts(out.data.cast(), out.length);
+            core::str::from_utf8_unchecked(slice)
         }
     }