Add FuelNet CRC32

bff-cli/src/crc.rs

@@ -1,6 +1,6 @@
 use std::io::{self, BufRead, Read};
 
-use bff::crc::{Asobo32, Asobo64, AsoboAlternate32, BlackSheep32, Kalisto32, Ubisoft64};
+use bff::crc::{Asobo32, Asobo64, AsoboAlternate32, BlackSheep32, Kalisto32, Ubisoft64, FuelNet32};
 use bff::traits::NameHashFunction;
 use clap::ValueEnum;
 
@@ -20,6 +20,8 @@ pub enum CrcAlgorithm {
     Asobo64,
     #[value(alias("u64"))]
     Ubisoft64,
+    #[value(alias("net"))]
+    FuelNet32,
 }
 
 #[derive(ValueEnum, Clone)]
@@ -82,6 +84,9 @@ fn hash(bytes: &[u8], starting: &i64, algorithm: &CrcAlgorithm, format: &CrcForm
         }
         CrcAlgorithm::Asobo64 => format_hash64(Asobo64::hash_options(bytes, starting), format),
         CrcAlgorithm::Ubisoft64 => format_hash64(Ubisoft64::hash_options(bytes, starting), format),
+        CrcAlgorithm::FuelNet32 => {
+            format_hash(FuelNet32::hash_options(bytes, starting as i32), format)
+        }
     }
 }
 

bff/src/crc/blacksheep32.rs

@@ -4,7 +4,7 @@ use crate::traits::NameHashFunction;
 
 // Appears to be the same as FreeBSD
 // https://github.com/lattera/freebsd/blob/401a161083850a9a4ce916f37520c084cff1543b/sys/libkern/crc32.c#L51-L95
-const CRC32_TABLE: [u32; 256] = [
+pub const CRC32_TABLE: [u32; 256] = [
     0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F, 0xE963A535, 0x9E6495A3,
     0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988, 0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91,
     0x1DB71064, 0x6AB020F2, 0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,

bff/src/crc/fuelnet32.rs

@@ -0,0 +1,33 @@
+use crate::traits::NameHashFunction;
+use super::blacksheep32::CRC32_TABLE;
+
+pub const fn fuelnet32(bytes: &[u8]) -> i32 {
+    fuelnet32_options(bytes, 0)
+}
+
+// https://github.com/lattera/freebsd/blob/401a161083850a9a4ce916f37520c084cff1543b/sys/libkern/crc32.c#L103-L113
+pub const fn fuelnet32_options(bytes: &[u8], starting: i32) -> i32 {
+    let mut hash = !starting as u32;
+    let mut i: usize = 0;
+    while i < bytes.len() {
+        let c = bytes[i];
+        hash = (hash >> 8) ^ CRC32_TABLE[((c as u32 ^ hash) & 0xff) as usize];
+        i += 1;
+    }
+
+    !hash as i32
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+pub struct FuelNet32;
+impl NameHashFunction for FuelNet32 {
+    type Target = i32;
+
+    fn hash(bytes: &[u8]) -> Self::Target {
+        fuelnet32(bytes)
+    }
+
+    fn hash_options(bytes: &[u8], starting: Self::Target) -> Self::Target {
+        fuelnet32_options(bytes, starting)
+    }
+}

bff/src/crc/mod.rs

@@ -4,10 +4,12 @@ mod asobo_alternate32;
 mod blacksheep32;
 mod kalisto32;
 mod ubisoft64;
+mod fuelnet32;
 
 pub use asobo32::*;
 pub use asobo64::*;
 pub use asobo_alternate32::*;
 pub use blacksheep32::*;
 pub use kalisto32::*;
 pub use ubisoft64::*;
+pub use fuelnet32::*;