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mod mmap;
#[cfg(unix)]
mod file_slice;
#[cfg(unix)]
mod async_file;
mod bounded;

#[cfg(unix)]
pub use self::async_file::AsyncFile;
#[cfg(unix)]
pub use self::file_slice::AsyncFileSlice;
pub use self::bounded::BoundedFileSink;
pub use self::bounded::BoundedFileOption;
pub use self::bounded::BoundedFileSinkError;

pub use self::mmap::MemoryMappedFile;
pub use self::mmap::MemoryMappedMutFile;


#[cfg(feature = "asyncstd")]
pub use async_std::fs::*;

#[cfg(feature = "tokio2")]
pub use tokio::fs::*;


pub mod util {

    use std::io::Error as IoError;
    use std::path::Path;

    use super::File;
    use super::OpenOptions;

    pub async fn create_dir_all<P: AsRef<Path>>(path: P) -> Result<(), IoError> {

        super::create_dir_all(path.as_ref()).await
    }


    /// open for write only
    pub async fn create<P>(path: P) -> Result<File, IoError>
    where
        P: AsRef<Path>,
    {
        File::create(path.as_ref()).await
    }

    /// open for only read
    pub async fn open<P>(path: P) -> Result<File, IoError>
    where
        P: AsRef<Path>,
    {
        let file_path = path.as_ref();
        File::open(file_path).await
    }

    /// open for read and write
    pub async fn open_read_write<P>(path: P) -> Result<File, IoError>
    where
        P: AsRef<Path>,
    {
        let file_path = path.as_ref();
        let mut option = OpenOptions::new();
        option.read(true).write(true).create(true).append(false);

        option.open(file_path).await
    }

    pub async fn open_read_append<P>(path: P) -> Result<File, IoError>
    where
        P: AsRef<Path>,
    {
        let file_path = path.as_ref();
        let mut option = OpenOptions::new();
        option.read(true).create(true).append(true);

        option.open(file_path).await
    }
}