util.h

#ifndef _UTIL_H_
#define _UTIL_H_

#include <stdint.h>
#include <stdio.h>

#ifndef MAX
#define MAX(x, y) (((x) > (y)) ? (x) : (y))
#endif
#ifndef MIN
#define MIN(x, y) (((x) < (y)) ? (x) : (y))
#endif

#define array_offset(array, x) \
  (((uintptr_t)(x) - (uintptr_t)(array)) / sizeof(*x))

struct queue_entry {
  void *data;
  size_t size;
  struct queue_entry *next;
};

struct queue_head {
  struct queue_entry *next;
  struct queue_entry *tail;
  unsigned int num;
};

void hexdump(FILE *fp, void *data, size_t size);

int queue_push(struct queue_head *queue, void *data, size_t size);
int queue_pop(struct queue_head *queue, void **data, size_t *size);

uint16_t cksum16(uint16_t *data, uint16_t size, uint32_t init);
uint16_t hton16(uint16_t);
uint16_t ntoh16(uint16_t);
uint32_t hton32(uint32_t);
uint32_t ntoh32(uint32_t);

void maskset(uint32_t *mask, size_t size, size_t offset, size_t len);
int maskchk(uint32_t *mask, size_t size, size_t offset, size_t len);
void maskclr(uint32_t *mask, size_t size);
void maskdbg(uint32_t *mask, size_t size);

#endif