/////////////////////////////////////////////////////////////////////////
// $Id: siminterface.cc,v 1.40 2002-04-18 00:22:19 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
/*
 * gui/siminterface.cc
 * $Id: siminterface.cc,v 1.40 2002-04-18 00:22:19 bdenney Exp $
 *
 * Defines the actual link between bx_simulator_interface_c methods
 * and the simulator.  This file includes bochs.h because it needs
 * access to bx_options and other simulator objects and methods.
 *
 */

#include "bochs.h"

bx_simulator_interface_c *SIM = NULL;
logfunctions *siminterface_log = NULL;
#define LOG_THIS siminterface_log->

// bx_simulator_interface just defines the interface that the Bochs simulator
// and the gui will use to talk to each other.  None of the methods of
// bx_simulator_interface are implemented; they are all virtual.  The
// bx_real_sim_c class is a child of bx_simulator_interface_c, and it
// implements all the methods.  The idea is that a gui needs to know only
// definition of bx_simulator_interface to talk to Bochs.  The gui should
// not need to include bochs.h.  
//
// I made this separation to ensure that all guis use the siminterface to do
// access bochs internals, instead of accessing things like
// bx_keyboard.s.internal_buffer[4] (or whatever) directly. -Bryce
// 

class bx_real_sim_c : public bx_simulator_interface_c {
  sim_interface_callback_t callback;
  void *callback_ptr;
#define BX_NOTIFY_MAX_ARGS 10
  int notify_int_args[BX_NOTIFY_MAX_ARGS];
  char *notify_string_args[BX_NOTIFY_MAX_ARGS];
#define NOTIFY_TYPE_INT
#define NOTIFY_TYPE_STRING
  int init_done;
  bx_param_c **param_registry;
  int registry_alloc_size;
  int enabled;
public:
  bx_real_sim_c ();
  virtual ~bx_real_sim_c ();
  virtual int get_init_done () { return init_done; }
  virtual int set_init_done (int n) { init_done = n; return 0;}
  virtual void get_param_id_range (int *min, int *max) {
    *min = BXP_NULL;
    *max = BXP_THIS_IS_THE_LAST-1;
  }
  virtual int register_param (bx_id id, bx_param_c *it);
  virtual bx_param_c *get_param (bx_id id);
  virtual bx_param_num_c *get_param_num (bx_id id);
  virtual bx_param_string_c *get_param_string (bx_id id);
  virtual int get_n_log_modules ();
  virtual char *get_prefix (int mod);
  virtual int get_log_action (int mod, int level);
  virtual void set_log_action (int mod, int level, int action);
  virtual char *get_action_name (int action);
  virtual const char *get_log_level_name (int level);
  virtual int get_max_log_level ();
  virtual void quit_sim (int code);
  virtual int get_default_rc (char *path, int len);
  virtual int read_rc (char *path);
  virtual int write_rc (char *path, int overwrite);
  virtual int get_log_file (char *path, int len);
  virtual int set_log_file (char *path);
  virtual int get_floppy_options (int drive, bx_floppy_options *out);
  virtual int get_cdrom_options (int drive, bx_cdrom_options *out);
  virtual char *get_floppy_type_name (int type);
  virtual void set_notify_callback (sim_interface_callback_t func, void *arg);
  virtual BxEvent* sim_to_gui_event (BxEvent *event);
  virtual int log_msg (const char *prefix, int level, char *msg);
  virtual int ask_param (bx_id which);
  virtual int get_enabled () { return enabled; }
  virtual void set_enabled (int enabled) { this->enabled = enabled; }
  // ask the user for a pathname
  virtual int ask_filename (char *filename, int maxlen, char *prompt, char *the_default, int flags);
  // called at a regular interval, currently by the keyboard handler.
  virtual void periodic ();
};

bx_param_c *
bx_real_sim_c::get_param (bx_id id)
{
  BX_ASSERT (id >= BXP_NULL && id < BXP_THIS_IS_THE_LAST);
  int index = (int)id - BXP_NULL;
  bx_param_c *retval = param_registry[index];
  if (!retval) 
    BX_INFO (("get_param can't find id %u", id));
  return retval;
}

bx_param_num_c *
bx_real_sim_c::get_param_num (bx_id id) {
  bx_param_c *generic = get_param(id);
  if (generic==NULL) {
    BX_PANIC (("get_param_num(%u) could not find a parameter", id));
    return NULL;
  }
  int type = generic->get_type ();
  if (type == BXT_PARAM_NUM || type == BXT_PARAM_BOOL || type == BXT_PARAM_ENUM)
    return (bx_param_num_c *)generic;
  BX_PANIC (("get_param_num %u could not find an integer parameter with that id", id));
  return NULL;
}

bx_param_string_c *
bx_real_sim_c::get_param_string (bx_id id) {
  bx_param_c *generic = get_param(id);
  if (generic==NULL) {
    BX_PANIC (("get_param_string(%u) could not find a parameter", id));
    return NULL;
  }
  if (generic->get_type () == BXT_PARAM_STRING)
    return (bx_param_string_c *)generic;
  BX_PANIC (("get_param_string %u could not find an integer parameter with that id", id));
  return NULL;
}

void bx_init_siminterface ()
{
  siminterface_log = new logfunctions ();
  siminterface_log->put ("CTRL");
  siminterface_log->settype(CTRLLOG);
  if (SIM == NULL) 
    SIM = new bx_real_sim_c();
}

bx_simulator_interface_c::bx_simulator_interface_c ()
{
}

bx_real_sim_c::bx_real_sim_c ()
{
  callback = NULL;
  callback_ptr = NULL;
  
  enabled = 1;
  int i;
  for (i=0; i<BX_NOTIFY_MAX_ARGS; i++) {
    notify_int_args[i] = -1;
    notify_string_args[i] = NULL;
  }
  init_done = 0;
  registry_alloc_size = BXP_THIS_IS_THE_LAST - BXP_NULL;
  param_registry = new bx_param_c*  [registry_alloc_size];
  for (i=0; i<registry_alloc_size; i++)
    param_registry[i] = NULL;
}

// called by constructor of bx_param_c, so that every parameter that is
// initialized gets registered.  This builds a list of all parameters
// which can be used to look them up by number (get_param).
bx_real_sim_c::~bx_real_sim_c ()
{
    if ( param_registry != NULL )
    {
        delete [] param_registry;
        param_registry = NULL;
    }
}

int
bx_real_sim_c::register_param (bx_id id, bx_param_c *it)
{
  if (id == BXP_NULL) return 0;
  BX_ASSERT (id >= BXP_NULL && id < BXP_THIS_IS_THE_LAST);
  int index = (int)id - BXP_NULL;
  if (this->param_registry[index] != NULL) {
    BX_INFO (("register_param is overwriting parameter id %d", id));
  }
  this->param_registry[index] = it;
  return 0;
}

int 
bx_real_sim_c::get_n_log_modules ()
{
  return io->get_n_logfns ();
}

char *
bx_real_sim_c::get_prefix (int mod)
{
  logfunc_t *logfn = io->get_logfn (mod);
  return logfn->getprefix ();
}

int 
bx_real_sim_c::get_log_action (int mod, int level)
{
  logfunc_t *logfn = io->get_logfn (mod);
  return logfn->getonoff (level);
}

void 
bx_real_sim_c::set_log_action (int mod, int level, int action)
{
  logfunc_t *logfn = io->get_logfn (mod);
  logfn->setonoff (level, action);
}

char *
bx_real_sim_c::get_action_name (int action)
{
  return io->getaction (action);
}

const char *
bx_real_sim_c::get_log_level_name (int level)
{
  return io->getlevel (level);
}

int 
bx_real_sim_c::get_max_log_level ()
{
  return N_LOGLEV;
}

void 
bx_real_sim_c::quit_sim (int code) {
#if 0
  if (!code)
    BX_PANIC (("Quit simulation command"));
  // tell bochs to shut down (includes vga screen)
  bx_atexit ();
  // tell the control panel to shut down
  BxEvent *event = new BxEvent ();
  event->type = BX_ASYNC_EVT_SHUTDOWN_GUI;
  sim_to_gui_event (event);
  // set something that will cause the cpu loop to exit.
  // or use setjmp/longjmp, or something.
  //FIXME!
#endif
  BX_INFO (("quit_sim called"));
#if BX_WITH_WX
  // in wxWindows, the whole simulator is running in a separate thread.
  // our only job is to end the thread as soon as possible, NOT to shut
  // down the whole application with an exit.
  BX_CPU_THIS_PTR async_event = 1;
  BX_CPU_THIS_PTR kill_bochs_request = 1;
  // the cpu loop will exit very soon after this condition is set.
#else
  // just a single thread.  Use exit() to stop the application.
  if (!code)
    BX_PANIC (("Quit simulation command"));
  ::exit (0);
#endif
}

int
bx_real_sim_c::get_default_rc (char *path, int len)
{
  char *rc = bx_find_bochsrc ();
  if (rc == NULL) return -1;
  strncpy (path, rc, len);
  return 0;
}

int 
bx_real_sim_c::read_rc (char *rc)
{
  return bx_read_configuration (rc);
}

// return values:
//   0: written ok
//  -1: failed
//  -2: already exists, and overwrite was off
int 
bx_real_sim_c::write_rc (char *rc, int overwrite)
{
  return bx_write_configuration (rc, overwrite);
}

int 
bx_real_sim_c::get_log_file (char *path, int len)
{
  strncpy (path, bx_options.log.Ofilename->getptr (), len);
  return 0;
}

int 
bx_real_sim_c::set_log_file (char *path)
{
  bx_options.log.Ofilename->set (path);
  return 0;
}

int 
bx_real_sim_c::get_floppy_options (int drive, bx_floppy_options *out)
{
  *out = (drive==0)? bx_options.floppya : bx_options.floppyb;
  return 0;
}

int 
bx_real_sim_c::get_cdrom_options (int drive, bx_cdrom_options *out)
{
  BX_ASSERT (drive == 0);
  *out = bx_options.cdromd;
  return 0;
}

char *floppy_type_names[] = { "none", "1.2M", "1.44M", "2.88M", "720K", NULL };
int n_floppy_type_names = 5;
char *floppy_status_names[] = { "ejected", "inserted", NULL };
int n_floppy_status_names = 2;
char *floppy_bootdisk_names[] = { "floppy", "hard","cdrom", NULL };
int n_floppy_bootdisk_names = 3;
char *loader_os_names[] = { "none", "linux", "nullkernel", NULL };
int n_loader_os_names = 3;
char *keyboard_type_names[] = { "xt", "at", "mf", NULL };
int n_keyboard_tupe_names = 3;

char *
bx_real_sim_c::get_floppy_type_name (int type)
{
  BX_ASSERT (type >= BX_FLOPPY_NONE && type <= BX_FLOPPY_720K);
  type -= BX_FLOPPY_NONE;
  return floppy_type_names[type];
}

void 
bx_real_sim_c::set_notify_callback (sim_interface_callback_t func, void *arg)
{
  callback = func;
  callback_ptr = arg;
}

BxEvent *
bx_real_sim_c::sim_to_gui_event (BxEvent *event)
{
  if (callback == NULL) {
    BX_ERROR (("notify called, but no callback function is registered"));
    return NULL;
  } else {
    return (*callback)(callback_ptr, event);
  }
}

// returns 0 for continue, 1 for alwayscontinue, 2 for die.
int 
bx_real_sim_c::log_msg (const char *prefix, int level, char *msg)
{
  BxEvent *be = new BxEvent ();
  be->type = BX_ASYNC_EVT_LOG_MSG;
  be->u.logmsg.prefix = (char *)prefix;
  be->u.logmsg.level = level;
  be->u.logmsg.msg = msg;
  //fprintf (stderr, "calling notify.\n");
  BxEvent *response = sim_to_gui_event (be);
  return response? response->retcode : -1;
}

/////////////////////////////////////////////////////////////////////////

// new stuff

bx_object_c::bx_object_c (bx_id id)
{
  this->id = id;
  this->type = BXT_OBJECT;
}

void
bx_object_c::set_type (bx_objtype type)
{
  this->type = type;
}

bx_param_c::bx_param_c (bx_id id, char *name, char *description)
  : bx_object_c (id)
{
  set_type (BXT_PARAM);
  this->name = name;
  this->description = description;
  this->text_format = NULL;
  this->ask_format = NULL;
  this->runtime_param = 0;
  this->enabled = 1;
  SIM->register_param (id, this);
}

bx_param_num_c::bx_param_num_c (bx_id id,
    char *name,
    char *description,
    Bit32s min, Bit32s max, Bit32s initial_val)
  : bx_param_c (id, name, description)
{
  set_type (BXT_PARAM_NUM);
  this->min = min;
  this->max = max;
  this->initial_val = initial_val;
  this->val = initial_val;
  this->handler = NULL;
  this->base = 10;
  set (initial_val);
}

void 
bx_param_num_c::reset ()
{
  this->val = initial_val;
}

void 
bx_param_num_c::set_handler (param_event_handler handler)
{ 
  this->handler = handler; 
  // now that there's a handler, call set once to run the handler immediately
  //set (get ());
}

Bit32s 
bx_param_num_c::get ()
{
  if (handler) {
    // the handler can decide what value to return and/or do some side effect
    return (*handler)(this, 0, val);
  } else {
    // just return the value
    return val;
  }
}

void
bx_param_num_c::set (Bit32s newval)
{
  if (handler) {
    // the handler can override the new value and/or perform some side effect
    val = newval;
    (*handler)(this, 1, newval);
  } else {
    // just set the value.  This code does not check max/min.
    val = newval;
  }
  if (val < min || val > max) 
    BX_PANIC (("numerical parameter %s was set to %d, which is out of range %d to %d", get_name (), val, min, max));
}

bx_param_bool_c::bx_param_bool_c (bx_id id,
    char *name,
    char *description,
    Bit32s initial_val)
  : bx_param_num_c (id, name, description, 0, 1, initial_val)
{
  set_type (BXT_PARAM_BOOL);
  set (initial_val);
}

bx_param_enum_c::bx_param_enum_c (bx_id id, 
      char *name,
      char *description,
      char **choices,
      Bit32s initial_val,
      Bit32s value_base)
  : bx_param_num_c (id, name, description, value_base, BX_MAX_INT, initial_val)
{
  set_type (BXT_PARAM_ENUM);
  this->choices = choices;
  // count number of choices, set max
  char **p = choices;
  while (*p != NULL) p++;
  this->min = value_base;
  // now that the max is known, replace the BX_MAX_INT sent to the parent
  // class constructor with the real max.
  this->max = value_base + (p - choices - 1);
  set (initial_val);
}

bx_param_string_c::bx_param_string_c (bx_id id,
    char *name,
    char *description,
    char *initial_val,
    int maxsize)
  : bx_param_c (id, name, description)
{
  set_type (BXT_PARAM_STRING);
  if (maxsize < 0) 
    maxsize = strlen(initial_val) + 1;
  this->val = new char[maxsize];
  this->initial_val = new char[maxsize];
  this->handler = NULL;
  this->maxsize = maxsize;
  strncpy (this->val, initial_val, maxsize);
  strncpy (this->initial_val, initial_val, maxsize);
  this->options = new bx_param_num_c (BXP_NULL,
      "stringoptions", NULL, 0, BX_MAX_INT, 0);
  set (initial_val);
}

bx_param_filename_c::bx_param_filename_c (bx_id id,
    char *name,
    char *description,
    char *initial_val,
    int maxsize)
  : bx_param_string_c (id, name, description, initial_val, maxsize)
{
  get_options()->set (BX_IS_FILENAME);
}

bx_param_string_c::~bx_param_string_c ()
{
    if ( this->val != NULL )
    {
        delete [] this->val;
        this->val = NULL;
    }
    if ( this->initial_val != NULL )
    {
        delete [] this->initial_val;
        this->initial_val = NULL;
    }

    if ( this->options != NULL )
    {
        delete [] this->options;
        this->options = NULL;
    }
}

void 
bx_param_string_c::reset () {
  strncpy (this->val, this->initial_val, maxsize);
}

void 
bx_param_string_c::set_handler (param_string_event_handler handler)
{
  this->handler = handler; 
  // now that there's a handler, call set once to run the handler immediately
  //set (getptr ());
}

Bit32s
bx_param_string_c::get (char *buf, int len)
{
  if (options->get () & BX_RAW_BYTES)
    memcpy (buf, val, len);
  else
    strncpy (buf, val, len);
  if (handler) {
    // the handler can choose to replace the value in val/len.  Also its
    // return value is passed back as the return value of get.
    (*handler)(this, 0, buf, len);
  }
  return 0;
}

void 
bx_param_string_c::set (char *buf)
{
  if (options->get () & BX_RAW_BYTES)
    memcpy (val, buf, maxsize);
  else
    strncpy (val, buf, maxsize);
  if (handler) {
    // the handler can return a different char* to be copied into the value
    buf = (*handler)(this, 1, buf, -1);
  }
}

#if 0
bx_list_c::bx_list_c (bx_id id, int maxsize)
  : bx_param_c (id, "list", "")
{
  set_type (BXT_LIST);
  this->size = 0;
  this->maxsize = maxsize;
  this->list = new bx_param_c*  [maxsize];
  init ();
}
#endif

bx_list_c::bx_list_c (bx_id id, char *name, char *description, bx_param_c **init_list)
  : bx_param_c (id, name, description)
{
  set_type (BXT_LIST);
  this->size = 0;
  while (init_list[this->size] != NULL)
    this->size++;
  this->maxsize = this->size;
  this->list = new bx_param_c*  [maxsize];
  for (int i=0; i<this->size; i++)
    this->list[i] = init_list[i];
  init ();
}

bx_list_c::~bx_list_c()
{
    if (this->list)
    {
        delete [] this->list;
        this->list = NULL;
    }
    if ( this->title != NULL)
    {
        delete this->title;
        this->title = NULL;
    }
    if (this->options != NULL)
    {
        delete this->options;
        this->options = NULL;
    }
    if ( this->choice != NULL )
    {
        delete this->choice;
        this->choice = NULL;
    }
}

void
bx_list_c::init ()
{
  // the title defaults to the name
  this->title = new bx_param_string_c (BXP_NULL,
      "title of list",
      "",
      get_name (), 80);
  this->options = new bx_param_num_c (BXP_NULL,
      "list_option", "", 0, BX_MAX_INT,
      0);
  this->choice = new bx_param_num_c (BXP_NULL,
      "list_choice", "", 0, BX_MAX_INT,
      1);
  this->parent = NULL;
}

void
bx_list_c::add (bx_param_c *param)
{
  if (this->size >= this->maxsize)
    BX_PANIC (("bx_list_c::add parameter id=%u exceeds capacity of list", param->get_id ()));
  list[size] = param;
  size++;
}

bx_param_c *
bx_list_c::get (int index)
{
  BX_ASSERT (index >= 0 && index < size);
  return list[index];
}

void
bx_list_c::set_parent (bx_param_c *parent)
{
  this->parent = parent;
}

// Called by simulator whenever it needs the user to choose a new value
// for a registered parameter.  Create a synchronous ASK_PARAM event, 
// send it to the GUI, and wait for the response.  The GUI will call the
// set() method on the parameter if the user changes the value.
int 
bx_real_sim_c::ask_param (bx_id param)
{
  bx_param_c *paramptr = SIM->get_param(param);
  BX_ASSERT (paramptr != NULL);
  // create appropriate event
  BxEvent *event = new BxEvent ();
  event->type = BX_SYNC_EVT_ASK_PARAM;
  event->u.param.param = paramptr;
  BxEvent *response = sim_to_gui_event (event);
  return response->retcode;
}

int
bx_real_sim_c::ask_filename (char *filename, int maxlen, char *prompt, char *the_default, int flags)
{
  // implement using ASK_PARAM on a newly created param.  I can't use
  // ask_param because I don't intend to register this param.
  BxEvent event;
  bx_param_string_c param (BXP_NULL, "filename", prompt, the_default, maxlen);
  flags |= param.BX_IS_FILENAME;
  param.get_options()->set (flags);
  event.type = BX_SYNC_EVT_ASK_PARAM;
  event.u.param.param = &param;
  BxEvent *response = sim_to_gui_event (&event);
  BX_ASSERT ((response == &event));
  if (event.retcode >= 0)
    memcpy (filename, param.getptr(), maxlen);
  return event.retcode;
}

void
bx_real_sim_c::periodic ()
{
  // give the GUI a chance to do periodic things on the bochs thread. in 
  // particular, notice if the thread has been asked to die.
  BxEvent *tick = new BxEvent ();
  tick->type = BX_SYNC_EVT_TICK;
  BxEvent *response = sim_to_gui_event (tick);
  int retcode = response->retcode;
  BX_ASSERT (response == tick);
  delete tick;
  if (retcode < 0) {
    BX_INFO (("Bochs thread has been asked to quit."));
    quit_sim (0);
  }
#if 0
  // watch for memory leaks.  Allocate a small block of memory, print the
  // pointer that is returned, then free.
  BxEvent *memcheck = new BxEvent ();
  BX_INFO(("memory allocation at %p", memcheck));
  delete memcheck;
#endif
}