feature gated ffi deps and CRC support

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "khash"
 description = "Kana hashes"
-version = "2.0.2"
+version = "2.0.3"
 authors = ["Avril <flanchan@cumallover.me>"]
 edition = "2018"
 license = "GPL-3.0-or-later"
@@ -11,9 +11,9 @@ license = "GPL-3.0-or-later"
 crate-type = ["rlib", "cdylib", "staticlib"]
 
 [features]
-default = ["ffi"]
+default = ["ffi", "crc"]
 
-ffi = []
+ffi = ["malloc-array"]
 
 [profile.release]
 opt-level = 3
@@ -23,9 +23,9 @@ panic = "unwind"
 
 [dependencies]
 sha2 = "0.9"
-malloc-array = "1.4"
+malloc-array = {version = "1.4", optional=true}
 libc = "0.2"
-crc = "1.8"
+crc = {version = "1.8", optional=true}
 hex-literal = "0.2"
 getrandom = "0.1"
 

src/ctx.rs

@@ -10,7 +10,9 @@ use std::{
 #[derive(Clone,Debug,PartialEq,Eq,Hash)]
 pub enum Algorithm
 {
+    #[cfg(feature="crc")] 
     Crc32,
+    #[cfg(feature="crc")] 
     Crc64,
     Sha256,
     Sha256Truncated,
@@ -67,8 +69,8 @@ impl Context
 	let mut output = 0usize;
 	let bytes = match self.algo
 	{
-	    Algorithm::Crc32 => provide::<hash::Crc32Checksum, _>(&mut from, &self.salt, &mut output)?,
-	    Algorithm::Crc64 => provide::<hash::Crc64Checksum, _>(&mut from, &self.salt, &mut output)?,
+	    #[cfg(feature="crc")] Algorithm::Crc32 => provide::<hash::Crc32Checksum, _>(&mut from, &self.salt, &mut output)?,
+	    #[cfg(feature="crc")] Algorithm::Crc64 => provide::<hash::Crc64Checksum, _>(&mut from, &self.salt, &mut output)?,
 	    Algorithm::Sha256 => provide::<hash::Sha256Hash, _>(&mut from, &self.salt, &mut output)?,
 	    Algorithm::Sha256Truncated => provide::<hash::Sha256Truncated, _>(&mut from, &self.salt, &mut output)?,
 	}.into_boxed_slice();
@@ -76,6 +78,7 @@ impl Context
 	Ok((output, bytes))
     }
 
+    #[cfg(feature="ffi")] 
     pub(crate) unsafe fn into_raw(self) -> CContext
     {
 	CContext{ 
@@ -85,6 +88,7 @@ impl Context
 	}
     }
     
+    #[cfg(feature="ffi")] 
     pub(crate) unsafe fn clone_from_raw(from: *const CContext) -> Self
     {
 	let from = &*from;
@@ -94,6 +98,7 @@ impl Context
 	}
     }
     
+    #[cfg(feature="ffi")] 
     pub(crate) unsafe fn from_raw(from: *mut CContext) -> Self
     {
 	let from = &mut *from;
@@ -139,8 +144,8 @@ impl From<Algorithm> for u8
     fn from(al: Algorithm) -> Self
     {
 	match al {
-	    Algorithm::Crc32 => ALGO_CRC32,
-	    Algorithm::Crc64 => ALGO_CRC64,
+	    #[cfg(feature="crc")] Algorithm::Crc32 => ALGO_CRC32,
+	    #[cfg(feature="crc")] Algorithm::Crc64 => ALGO_CRC64,
 	    Algorithm::Sha256 => ALGO_SHA256,
 	    Algorithm::Sha256Truncated => ALGO_SHA256_TRUNCATED,
 	}
@@ -151,8 +156,8 @@ impl From<u8> for Algorithm
     fn from(al: u8) -> Self
     {
 	match al {
-	    ALGO_CRC32 => Algorithm::Crc32,
-	    ALGO_CRC64 => Algorithm::Crc64,
+	    #[cfg(feature="crc")] ALGO_CRC32 => Algorithm::Crc32,
+	    #[cfg(feature="crc")] ALGO_CRC64 => Algorithm::Crc64,
 	    ALGO_SHA256 => Algorithm::Sha256,
 	    ALGO_SHA256_TRUNCATED => Algorithm::Sha256Truncated,
 	    _ => Self::default(),

src/ext.rs

@@ -1,5 +1,7 @@
 use crate::*;
 
+#[cfg(feature="ffi")] 
+const _:() = { 
     pub trait HeapArrayExt: Sized
     {
 	fn into_unsafe(self) -> Self;
@@ -24,3 +26,4 @@ impl<T> HeapArrayExt for HeapArray<T>
 	    self
 	}
     }
+};

src/hash/mod.rs

@@ -3,10 +3,14 @@ use crate::*;
 mod sha256;
 pub use sha256::*;
 
+#[cfg(feature="crc")] 
 mod crc64;
+#[cfg(feature="crc")] 
 pub use crc64::*;
 
+#[cfg(feature="crc")] 
 mod crc32;
+#[cfg(feature="crc")] 
 pub use crc32::*;
 
 mod sha256t;

src/lib.rs

@@ -1,5 +1,6 @@
 #![cfg_attr(nightly, feature(test))] 
 #![allow(dead_code)]
+#![allow(unused_imports)]
 
 #[cfg(nightly)] extern crate test;
 
@@ -10,7 +11,7 @@ use std::{
     fmt::Write,
 };
 
-type HASHER = hash::Crc64Checksum;
+//type HASHER = hash::Crc64Checksum; //was unused?
 
 #[cfg(test)]
 mod tests {
@@ -145,7 +146,9 @@ mod tests {
 	}
     }
 
+
     #[test]
+    #[cfg(feature="ffi")]
     fn max_len()
     {
 	fn max_length(algo: ctx::Algorithm, data_len: usize) -> usize
@@ -239,6 +242,7 @@ use libc::{
     c_char,
 };
 
+#[cfg(feature="ffi")] 
 use malloc_array::{
     HeapArray,
 };
@@ -246,7 +250,6 @@ use malloc_array::{
 
 
 // FFI section
-
 #[cfg(feature="ffi")] 
 mod c;
 #[cfg(feature="ffi")] 

src/salt.rs

@@ -1,4 +1,5 @@
-use malloc_array::*;
+#[cfg(feature="ffi")] use malloc_array::*;
+
 use getrandom::{
     getrandom,
     Error,
@@ -104,8 +105,9 @@ pub(crate) const SALT_TYPE_RANDOM: u8 = 3;
 
 /// We won't try to copy more than this much data.
 const MAX_FFI_SALT_SIZE: usize = 1024;
+
 /// Clone a new `Salt` from an `FFI` salt.
-pub(crate) unsafe fn clone_from_raw(ptr: *const FFI) -> Salt
+#[cfg(feature="ffi")] pub(crate) unsafe fn clone_from_raw(ptr: *const FFI) -> Salt
 {
     let ffi = &*ptr;
     match ffi.salt_type {
@@ -119,7 +121,7 @@ pub(crate) unsafe fn clone_from_raw(ptr: *const FFI) -> Salt
     }
 }
 /// Consume an `FFI` salt and return a `Salt`.
-pub(crate) unsafe fn from_raw(ptr: *mut FFI) -> Salt
+#[cfg(feature="ffi")]  pub(crate) unsafe fn from_raw(ptr: *mut FFI) -> Salt
 {
     let ffi = &mut *ptr;
     let out = match ffi.salt_type {
@@ -138,7 +140,7 @@ pub(crate) unsafe fn from_raw(ptr: *mut FFI) -> Salt
 }
 
 /// Consume a `Salt` and output a new `FFI` salt.
-pub(crate) unsafe fn into_raw(salt: Salt) -> FFI
+#[cfg(feature="ffi")] pub(crate) unsafe fn into_raw(salt: Salt) -> FFI
 {
     unsafe fn allocate(slice: impl AsRef<[u8]>) -> FFI
     {
@@ -166,8 +168,7 @@ pub(crate) unsafe fn into_raw(salt: Salt) -> FFI
     }
 }
 
-fn box_with_malloc(slice: impl AsRef<[u8]>) -> (*mut u8, usize)
+#[cfg(feature="ffi")] fn box_with_malloc(slice: impl AsRef<[u8]>) -> (*mut u8, usize)
 {
     unsafe { HeapArray::from_slice_copied(slice) }.into_raw_parts()
 }
-