// common file to handle odd memory mappings

struct mapping_t : public area_t
{
  ea_t target;
};

static areacb_t mapping;
static asize_t default_mapping_size;

//--------------------------------------------------------------------------
// call from ph.init
void init_mapping(asize_t default_size, const char *idpname, const char *mname=NULL)
{
  if ( mname == NULL ) mname = "$ memory mappings";
  default_mapping_size = default_size;
  if ( !mapping.link(mname, mname, sizeof(mapping_t)) )
    mapping.create(mname, mname, sizeof(mapping_t));
  static const char mapping_exists[] =
  "IDA Pro for %s supports memory mapping.\n"
  "If you see references to the memory addresses not\n"
  "belonging to the program, you may want to use it.\n"
  "The memory mapping is available at\n"
  "Options, General, Analysis, Processor specific options\n";
  info(mapping_exists, idpname);
}

//--------------------------------------------------------------------------
// call from ph.closebase
void term_mapping(void)
{
  mapping.save();
  mapping.terminate();
}

//--------------------------------------------------------------------------
inline void move_mapping(ea_t from, segment_t *s)
{
  mapping.move_areas(from, s->startEA, s->size());
}

//--------------------------------------------------------------------------
ea_t use_mapping(ea_t ea)
{
  mapping_t *m = (mapping_t *)mapping.get_area(ea);
  if ( m != NULL )
    return m->target + (ea-m->startEA);
  return ea;
}

//--------------------------------------------------------------------------
static void print_mappings(char *buf, int bufsize)
{
  char *ptr = buf;
  int n = mapping.get_area_qty();
  for ( int i=0; i < n; i++ )
  {
    mapping_t *m = (mapping_t *)mapping.getn_area(i);
    int len = qsnprintf(ptr, bufsize, "  %08a..%08a -> %08a..%08a\n",
        m->startEA, m->endEA, m->target, m->target + m->size());
    ptr += len;
    bufsize -= len;
  }
  qsnprintf(ptr, bufsize, "\n\n");
}

//--------------------------------------------------------------------------
static void add_mapping(TView *fields[],int)
{
static const char form[] =
"Add mapping\n"
"\n"
"<~F~rom:N:16:16::> (nonexisting address)\n"
"<~T~o  :N:16:16::> (existing address)\n"
"<~S~ize:N:16:16::>\n"
"\n"
"\n";
  static mapping_t m;
  asize_t size = default_mapping_size;
  while ( AskUsingForm_c(form, &m.startEA, &m.target, &size) )
  {
    area_t *e;
    m.endEA = m.startEA + size;
    while ( (e=mapping.get_area(m.endEA)) != NULL && e->startEA != m.endEA )
      m.endEA = e->startEA;
    if ( !mapping.create_area(&m) ) { warning("Can't add mapping!"); continue; }
    noUsed(inf.minEA, inf.maxEA);
    close_form(fields, true);
    break;
  }
}

//--------------------------------------------------------------------------
static const char *maphdr[] = { "Start", "End", "Target" };
static const int widths[] = { 8, 8, 8 };

static void getl_mapping(areacb_t *,ulong n,char * const *arrptr)
{
  if ( n == 0 )
  {
    for ( int i=0; i < qnumber(maphdr); i++ )
      qstrncpy(arrptr[i], maphdr[i], MAXSTR);
    return;
  }
  mapping_t *m = (mapping_t *)mapping.getn_area(n-1);
  qsnprintf(arrptr[0], MAXSTR, "%08a", m->startEA);
  qsnprintf(arrptr[1], MAXSTR, "%08a", m->endEA);
  qsnprintf(arrptr[2], MAXSTR, "%08a", m->target);
}

static void remove_mapping(TView *fields[],int)
{
  mapping_t *m = (mapping_t *)mapping.choose_area2(true,
                qnumber(widths), widths,
                getl_mapping,
                "Please select mapping to remove",
                -1);
  if ( m != NULL )
  {
    mapping.del_area(m->startEA);
    noUsed(inf.minEA, inf.maxEA);
    close_form(fields, true);
  }
}