Trait SortHost

Source

pub trait SortHost<'a, P: Copy, X: Copy>: Files<P, X> {
    type Register: Copy;
    type Procedure: Copy;
    type File;
    type Keys;

Show 13 methods    // Required methods
    fn locate_register(
        &mut self,
        register: Self::Register,
    ) -> Result<Loc, Abend>;
    fn register_value(
        &mut self,
        register: Self::Register,
        pos: Pos,
    ) -> Result<i64, Abend>;
    fn file_index(&self, file: &Self::File, pos: Pos) -> Result<usize, Abend>;
    fn keys(
        &mut self,
        keys: &Self::Keys,
        pos: Pos,
    ) -> Result<Vec<ItemKey>, Abend>;
    fn sort_file(&self, k: usize) -> SortFile<'a, P, X>;
    fn active(&mut self) -> &mut Option<Active>;
    fn open(&mut self, k: usize, mode: OpenMode, pos: Pos) -> Result<(), Abend>;
    fn close(&mut self, k: usize, pos: Pos) -> Result<bool, Abend>;
    fn put(&mut self, k: usize, loc: Loc, pos: Pos) -> Result<bool, Abend>;
    fn fail(
        &mut self,
        k: usize,
        status: FileStatus,
        mode: Option<OpenMode>,
        message: String,
        pos: Pos,
    ) -> Result<(), Abend>;
    fn has_error_procedure(&self, k: usize, mode: OpenMode) -> bool;
    fn run_procedure(
        &mut self,
        procedure: Self::Procedure,
        kind: Procedure,
        pos: Pos,
    ) -> Result<Option<Ending>, Abend>;
    fn err(&mut self) -> &mut dyn Write;
}

Expand description

What a SORT or MERGE asks of the executor beyond Files: its handles to the special registers, procedures, files and keys the statement names, the file statements with their EXCEPTION/ERROR procedures, running a procedure, and where the sort in progress is kept.