all repos — xyw @ 9c68b98b4a7d270ca497eaf5e400053e9b67aae5

A minimal virtual machine and assembler for terminals.

devices/terminal.c

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#include <stdio.h>
#include "../xyw.h"

/* terminal device */
#define TERMINAL_INPUT 0x0
#define TERMINAL_OUTPUT 0x1
#define TERMINAL_ON_KEYPRESS 0x2
#define TERMINAL_ON_ARGUMENT 0x4

void terminal_output(xyw_byte *data, xyw_byte addr, xyw_byte *error)
{
    (void)error;
    switch (addr)
    {
    case TERMINAL_INPUT:
    {
        xyw_word handler;
        if (!xyw_argv_processed && XYW_PEEKW(&data[TERMINAL_ON_ARGUMENT]))
        {
            // Process input as arguments (separated by XYW_ARGUMENT_SEPARATOR) until XYW_END_OF_ARGUMENTS
            handler = XYW_PEEKW(&data[TERMINAL_ON_ARGUMENT]);
        }
        else
        {
            // Process stdin keypress
            handler = XYW_PEEKW(&data[TERMINAL_ON_KEYPRESS]);
        }
        if (handler)
        {
            xyw_eval(handler);
        }
        break;
    }
    case TERMINAL_OUTPUT:
        fputc(data[addr], stdout);
        fflush(stdout);
        break;
    }
}

xyw_byte terminal_input(xyw_byte *data, xyw_byte addr, xyw_byte *error)
{
    (void)error;
    return data[addr];
}