#ifndef _SFXD_COMMON_H_
#define _SFXD_COMMON_H_

#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define BUFFER_SIZE 8192
#define DAEMON_SOCKET_PATH "/tmp/sfxd-ipc"
#define CLIENT_SOCKET_PATH "/tmp/sfxd-client-%ld"

#define PANIC_FMT(FMT, ...) _panic(__LINE__, __FILE__, errno, FMT, __VA_ARGS__)
#define PANIC(TXT) _panic(__LINE__, __FILE__, errno, TXT)
#define EXPECT(CODE, CONDITION) { \
  ssize_t __res = (CODE); \
  if (!(__res CONDITION)) \
    PANIC_FMT("%s failed condition: %zd %s", #CODE, __res, #CONDITION); \
}

static inline void _panic(int line, const char *filename, int _errno, const char *fmt, ...) {
  fprintf(stderr, "Panic at %s:%d\nMessage: ", filename, line);
  va_list args;
  va_start(args, fmt);
  vfprintf(stderr, fmt, args);
  va_end(args);

  fprintf(stderr, "\nerrno: %d (%s)\n", _errno, strerror(_errno));

  exit(EXIT_FAILURE);
}

static inline uint32_t adler32(const void *buf, size_t buflength) {
  const uint8_t *buffer = (const uint8_t*)buf;

  uint32_t s1 = 1;
  uint32_t s2 = 0;

  for (size_t n = 0; n < buflength; n++) {
    s1 = (s1 + buffer[n]) % 65521;
    s2 = (s2 + s1) % 65521;
  }
  return (s2 << 16) | s1;
}

#endif