Function sendFile [src]

Prototype

pub fn sendFile(w: *Writer, file_reader: *File.Reader, limit: Limit) FileError!usize

Parameters

w: *Writerfile_reader: *File.Readerlimit: Limit

Possible Errors

EndOfStream

Reached the end of the file being read.

ReadFailed

Detailed diagnostics are found on the File.Reader struct.

Unimplemented

Indicates the caller should do its own file reading; the callee cannot offer a more efficient implementation.

WriteFailed

See the Writer implementation for detailed diagnostics.

Source

  pub fn sendFile(w: *Writer, file_reader: *File.Reader, limit: Limit) FileError!usize {
    if (File.Handle == void) return error.Unimplemented;
    switch (builtin.zig_backend) {
        else => {},
        .stage2_aarch64 => return error.Unimplemented,
    }
    const d: *Discarding = @alignCast(@fieldParentPtr("writer", w));
    d.count += w.end;
    w.end = 0;
    if (limit == .nothing) return 0;
    if (file_reader.getSize()) |size| {
        const n = limit.minInt64(size - file_reader.pos);
        if (n == 0) return error.EndOfStream;
        file_reader.seekBy(@intCast(n)) catch return error.Unimplemented;
        w.end = 0;
        d.count += n;
        return n;
    } else |_| {
        // Error is observable on `file_reader` instance, and it is better to
        // treat the file as a pipe.
        return error.Unimplemented;
    }
}  