#include "libFireBird.h"

static int looked = 0;
static dword *bmCount = NULL;
static dword *bmRec = NULL;
static int bmMax = 0;

// Locates firmware variables
static void findBM()
{
  word *bm;
  InitTAPex();
  looked = 1;
  bm = (word*)FindInstructionSequence(
    "3c1681ee 3c1381ee 26d6b10c 2673b100 8f8487ec 26650008 0c055da3 26c60180",
    "fff00000 fff00000 ff000000 ff000000 ffff0000 ff0fffff fc000000 ff8ff000",
    0x80100000, 0x80180000, 0, FALSE);
  if(bm == NULL)
    TAP_Print("No bookmark variables - unsupported firmware (fw: %d:%x)\n", SysID, ApplID);
  else
  {
    bmRec = (dword*)((bm[1]<<16)+(short)bm[5]);
    bmCount = (dword*)((bm[3]<<16)+(short)bm[7]);
    bmMax = bm[15] >> 3;
  }
}

// Returns bookmark count for the slot (0,1=RecSlot [Chase/Timeshift], 2=Play)
dword getBookmarkCount(dword slot)
{
  if(looked == 0)
    findBM();
  if(bmCount && slot<=2)
    return bmCount[slot];
  else
    return 0;
}

// Returns bookmark n for the slot (0,1=RecSlot [Chase/Timeshift], 2=Play)
dword getBookmark(dword slot, dword n)
{
  if(looked == 0)
    findBM();
  if(bmRec && n<bmCount[slot])
    return bmRec[slot*bmMax+n];
  else
    return 0;
}