Add catsystem2 int archive support

src/utils/crc32.rs

@@ -0,0 +1,48 @@
+use lazy_static::lazy_static;
+
+fn get_crc32normal_table() -> [u32; 256] {
+    let mut table = [0; 256];
+    for i in 0..256u32 {
+        let mut c = i << 24;
+        for _ in 0..8 {
+            if c & 0x80000000 != 0 {
+                c = (c << 1) ^ 0x04C11DB7; // Polynomial for CRC-32
+            } else {
+                c <<= 1;
+            }
+        }
+        table[i as usize] = c;
+    }
+    table
+}
+
+lazy_static! {
+    pub static ref CRC32NORMAL_TABLE: [u32; 256] = get_crc32normal_table();
+}
+
+pub struct Crc32Normal {
+    crc: u32,
+}
+
+impl Crc32Normal {
+    pub fn new() -> Self {
+        Crc32Normal { crc: 0xFFFFFFFF }
+    }
+
+    pub fn update_crc(init_crc: u32, data: &[u8]) -> u32 {
+        let mut crc = init_crc;
+        for &byte in data {
+            let index = ((crc >> 24) ^ byte as u32) & 0xFF;
+            crc = (crc << 8) ^ CRC32NORMAL_TABLE[index as usize];
+        }
+        crc ^ 0xFFFFFFFF
+    }
+
+    pub fn update(&mut self, data: &[u8]) {
+        self.crc = Self::update_crc(self.crc, data);
+    }
+
+    pub fn value(&self) -> u32 {
+        self.crc
+    }
+}

src/utils/mod.rs

@@ -1,6 +1,8 @@
 #[cfg(feature = "utils-bit-stream")]
 pub mod bit_stream;
 pub mod counter;
+#[cfg(feature = "utils-crc32")]
+pub mod crc32;
 pub mod encoding;
 #[cfg(windows)]
 mod encoding_win;