#pragma once

#if defined __linux__ && !defined _GNU_SOURCE
#define _GNU_SOURCE
#endif

#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>

#include <arpa/inet.h>

#ifndef PACKAGE_NAME
#define PACKAGE_NAME "glorytun"
#endif

#ifndef PACKAGE_VERSION
#define PACKAGE_VERSION "0.0.0"
#endif

#ifndef GT_RUNDIR
#define GT_RUNDIR "/run/" PACKAGE_NAME
#endif

#define COUNT(x)       (sizeof(x)/sizeof(x[0]))

#define ALIGN_SIZE     (1<<4)
#define ALIGN_MASK     (ALIGN_SIZE-1)

#define ALIGN(x)       (((x)+ALIGN_MASK)&~ALIGN_MASK)
#define ALIGN_DOWN(x)  ((x)&~ALIGN_MASK)

#define PALIGN(x)      ((void *)ALIGN((size_t)(x)))
#define PALIGN_DOWN(x) ((void *)ALIGN_DOWN((size_t)(x)))

#define _1_(x)         (__builtin_expect((x), 1))
#define _0_(x)         (__builtin_expect((x), 0))

#define CLZ(x)         (__builtin_clz(x))

#define _printf_(A,B)  __attribute__ ((format(printf,A,B)))
#define _noreturn_     __attribute__ ((noreturn))
#define _unused_       __attribute__ ((unused))
#define _pure_         __attribute__ ((pure))
#define _const_        __attribute__ ((const))
#define _align_(...)   __attribute__ ((aligned(__VA_ARGS__)))

#undef MAX
#define MAX(x,y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X > Y ? X : Y; })

#undef MIN
#define MIN(x,y) ({ __typeof__(x) X=(x); __typeof__(y) Y=(y); X < Y ? X : Y; })

#define GT_CIPHER(x)  ((x) ? "chacha20poly1305" : "aegis256")

extern volatile sig_atomic_t gt_alarm;
extern volatile sig_atomic_t gt_reload;
extern volatile sig_atomic_t gt_quit;

int  gt_print (const char *, ...) _printf_(1,2);
void gt_log   (const char *, ...) _printf_(1,2);

int gt_tohex   (char *, size_t, const uint8_t *, size_t);
int gt_fromhex (uint8_t *, size_t, const char *, size_t);

void     gt_set_port (struct sockaddr *, uint16_t);
uint16_t gt_get_port (struct sockaddr *);
int      gt_toaddr   (char *, size_t, struct sockaddr *);

int gt_show   (int, char **);
int gt_bind   (int, char **);
int gt_path   (int, char **);
int gt_keygen (int, char **);
int gt_bench  (int, char **);
int gt_set    (int, char **);