#![no_main]

use libfuzzer_sys::fuzz_target;

use std::io::Cursor;

#[inline(always)]

fn png_decode(data: &[u8]) -> Result<(Option<png::OutputInfo>, Vec<u8>), ()> {

    let limits = png::Limits { bytes: 1 << 16 };

    let decoder = png::Decoder::new_with_limits(Cursor::new(data), limits);

    let  mut reader = decoder.read_info().map_err(|_| ())?;

    if reader.info().raw_bytes() > 5_000_000 {

        return Err(());

    }

    let mut img_data = vec![0u8; reader.info().raw_bytes()];

    let mut last_info = None;

    while let Ok(info) = reader.next_frame(&mut img_data) {

        last_info = Some(info);

    }

    Ok((last_info, img_data))

}

fuzz_target!(|data: &[u8]| {

    let _ = png_decode(&data);

});