init

src/main.rs

@@ -0,0 +1,32 @@
+use std::ffi::CStr;
+
+fn main() {
+    let gz = std::env::args().nth(1).unwrap();
+    let gz = std::fs::read(gz).unwrap();
+
+    assert_eq!(gz[0], 31, "ID");
+    assert_eq!(gz[1], 139, "ID");
+    assert_eq!(gz[2], 8, "compression method");
+
+    let flg = gz[3];
+
+    assert!(flg == 8 || flg == 0); // only FLG.FNAME
+
+    let mut data_start = 10;
+
+    if flg & 0b1000 != 0 {
+        let fname = CStr::from_bytes_until_nul(&gz[10..]).unwrap();
+        dbg!(fname);
+        data_start += fname.count_bytes() + 1;
+    }
+
+    let blocks = &gz[(data_start)..];
+    let blocks = &blocks[..(blocks.len() - 8)]; // crc32 and isize
+
+    let mut out = Vec::new();
+
+    zwergli::inflate(blocks, &mut out);
+
+    dbg!(&out);
+    dbg!(String::from_utf8(out)).ok();
+}