// utility.h
// Utilities for the SplitBit CPU Emulator
// Written by Anachronaut
// 10/15/2024


#ifndef UTILITY_H
#define UTILITY_H

#include <stdint.h>
#include "io.h"
#include "cpu.h"

// Results of reading the command line.
#define OPTIONS_OK    0 // Carry on and run the program.
#define OPTIONS_HELP  1 // The user asked for help, so stop, but not because of an error.
#define OPTIONS_ERROR 2 // The command line was no good, stop and complain.

typedef struct {
    uint8_t debug;         // Step one instruction at a time, printing the registers.
    uint8_t fast;          // Ignore the cycle rate and run as fast as the host allows.
    unsigned long cycles;  // Stop after this many cycles. Zero means run until the program halts.
    unsigned long diskCycles; // How long a block move takes. Zero is instant, and the default.
    // ---- The drives, in the order they were named ----
    //
    // --disk given more than once fills them in turn, so the first is drive 0 and the machine
    // has as many as were asked for. One name is the ordinary case and reads exactly as it
    // did when there could only be one.
    const char *disk;      // Disk image to attach, or NULL for a machine with no disk.
    const char *disks[DISK_DRIVE_COUNT];
    int diskCount;
    uint8_t writeProtect;  // Attach the disk read only, the way a tab on a floppy would.
    const char *screen;    // Where to save a picture of the screen when the machine stops.
    const char *keyboard;  // Feed the console from this file as a keyboard, not a terminal.
    const char *sound;     // Where to save the samples the machine made, as raw 16 bit.
} EmulatorOptions;

uint8_t parseOptions(int argc, char *argv[], EmulatorOptions *options);

void printHelp(const char *programName);

uint8_t loadFile(const char *path, uint8_t *Program, uint8_t *Data);

void bootStrap(uint8_t *Program, uint8_t *Data);

void printRegisters(CPURegisters *cpu, uint8_t *Program, uint8_t *Data);

#endif // UTILITY_H