#include "type-def.h"
static char **bList;

void initDisk()
{
  int i;
  bList = (char **)malloc(sizeof(char *)*NUM_BLOCKS);
  for (i=0; i < NUM_BLOCKS; i++) {
    bList[i] = (char *)NULL;
  }
}

void freeDisk()
{
  int i;
  
  for (i=0; i < NUM_BLOCKS; i++) {
    if (bList[i] != (char *)NULL) {
      free(bList[i]);
    }
  }
  free(bList);
}

int dRead(int addr, char *buf)
{
  int i;
  if (addr >= NUM_BLOCKS) return ERROR;
  if (bList[addr] != NULL) {
    for (i=0; i < BLOCK_SIZE; i++) {
      buf[i] = bList[addr][i];
    }
  }
  else {
    for (i=0; i < BLOCK_SIZE; i++) {
      buf[i] = 0;
    }
  }
  //sleep(1);
  return NO_ERROR;
}

int dWrite(int addr, char *buf)
{
  int i;
  if (addr >= NUM_BLOCKS) return ERROR;
  if (bList[addr] == NULL) {
    bList[addr] = (char *)malloc(BLOCK_SIZE);
  }
  
  for (i=0; i < BLOCK_SIZE; i++) {
    bList[addr][i] = buf[i];
  }
  //sleep(1);
  return NO_ERROR;
}