Licar/general.h

#ifndef _LCR_GENERAL_H
#define _LCR_GENERAL_H

/*
  Licar: general

  This file holds general definitions used by all modules.
*/

#include <stdint.h>
#include "settings.h"

// TODO: maybe move module specific constants to the modules themselves?

// constants (not supposed to be changed, doing so may break stuff):

#define LCR_EFFECTIVE_RESOLUTION_X \
  (LCR_SETTING_RESOLUTION_X / LCR_SETTING_RESOLUTION_SUBDIVIDE)

#define LCR_EFFECTIVE_RESOLUTION_Y \
  (LCR_SETTING_RESOLUTION_Y / LCR_SETTING_RESOLUTION_SUBDIVIDE)

#define LCR_MAP_SIZE_BLOCKS 64

/** Physics FPS, i.e. the number of physics ticks per second. */
#define LCR_RACING_FPS 30

#define LCR_RACING_TICK_MS \
  (100000 / (LCR_RACING_FPS * LCR_SETTING_TIME_MULTIPLIER))

char _LCR_hexDigit(int i)
{
  return i < 10 ? '0' + i : ('a' - 10 + i);
}

int _LCR_hexDigitVal(char c)
{
  if (c >= '0' && c <= '9')
    return c - '0';

  if (c >= 'a' && c <= 'f')
    return c - 'a' + 10;

  return -1;
}

/**
  Computes simple hash of a string represented by a function returning next
  string character, ending at 0 or endChar. This is intended for simple (but
  not 100% reliable) string comparison.
*/
uint16_t _LCR_simpleStrHash(char (*nextChar)(void), char endChar)
{
  uint16_t r = 0;
 
  while (1)
  {
    char c = nextChar();

    if (c == 0 || c == endChar)
      break;

    r = ((r << 5) | (r >> 11)) + c;
  }

  return r;
}

#endif // guard