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package bjc.utils.cli.fds;
import java.io.PrintStream;
import bjc.utils.esodata.SimpleStack;
import bjc.utils.esodata.Stack;
import bjc.utils.ioutils.PushbackBlockReader;
/**
* Internal state for an FDS interface.
*
* @author bjculkin
*
* @param <S>
* The state type of the interface.
*/
public class FDSState<S> {
/**
* The input mode for the interface.
*
* @author bjculkin
*
*/
public static enum InputMode {
/**
* Normal mode.
*
* Reads only the first character in the block as a command.
*/
NORMAL,
/**
* Reads every character in the block as a command.
*/
CHORD,
/**
* Reads every character in the block, but after a terminal
* command, data will be read in-line separated by spaces until
* a semicolon is read.
*
* The semicolon can be escaped with a backslash.
*/
INLINE,
/**
* Reads every character in the block, but after a terminal
* command, data will be read in-line with each character being
* a separate item until a semicolon is read.
*
* The semicolon can be escaped with a backslash.
*/
CHARINLINE,
}
/**
* The state of the interface
*/
public S state;
/**
* The input mode for the interface.
*/
public InputMode mode;
/**
* The modes being used.
*/
public Stack<FDSMode<S>> modes;
/**
* The source to read command blocks from.
*/
public PushbackBlockReader comin;
/**
* The source to read data blocks from.
*/
public PushbackBlockReader datain;
/**
* The destination for output.
*/
public PrintStream printer;
/**
* Create a new interface state.
*
* @param stat
* The initial state for the interface.
*
* @param inputMode
* The input mode for the interface.
* @param cmin
* The source of command blocks.
*
* @param datin
* The source of data blocks.
*
* @param print
* The destination for output.
*/
public FDSState(S stat, InputMode inputMode, PushbackBlockReader cmin, PushbackBlockReader datin,
PrintStream print) {
state = stat;
mode = inputMode;
comin = cmin;
datain = datin;
printer = print;
modes = new SimpleStack<>();
}
}
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