#pragma once

#include <assert.h>
#include <ctype.h>
#include <float.h>
#include <inttypes.h>
#include <limits.h>
#include <math.h>
#include <setjmp.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>

#if defined(__APPLE__)
#include <machine/endian.h>
#else
#include <endian.h>
#endif

#if !defined(__SIZEOF_POINTER__)
#error pointer size unknown
#elif __SIZEOF_POINTER__ == 8
#define BITS64
#if defined(__aarch64__)
// this one's special since aarch64 may use tagged pointers
#define FWD_BIT (1ULL<<55)
#endif
#endif

#if !defined(FWD_BIT)
#if defined(BITS64)
#define FWD_BIT (sl_v)(1ULL<<63)
#else
#define FWD_BIT (sl_v)(1U<<31)
#endif
#endif

#if defined(__linux__)
#define __os_name__ "linux"
#elif defined(__OpenBSD__)
#define __os_name__ "openbsd"
#elif defined(__FreeBSD__)
#define __os_name__ "freebsd"
#elif defined(__NetBSD__)
#define __os_name__ "netbsd"
#elif defined(__DragonFly__)
#define __os_name__ "dragonflybsd"
#elif defined(__APPLE__)
#define __os_name__ "macosx"
#elif defined(__HAIKU__)
#define __os_name__ "haiku"
// FIXME(sigrid): why is this not exposed?
int vdprintf(int fd, const char *restrict format, va_list ap);
#elif defined(__sun__)
#define __os_name__ "sun"
#undef FWD_BIT // mmap returns top bits set, let's not bother at all
#else
#define __os_name__ "unknown"
#endif

extern char *os_version;
#define __os_version__ os_version

#define SYS_DEV_NULL "/dev/null"

typedef sigjmp_buf sl_jmp_buf;
#define sl_setjmp(e) sigsetjmp((e), 0)
#define sl_longjmp(e, v) siglongjmp((e), (v))
#define sys_exit(status, code) do{ \
	exit((status) == nil && (code) == 0 ? 0 : (code)); \
}while(0)
#define sysfatal(...) do{ \
	fprintf(stderr, __VA_ARGS__); \
	fputc('\n', stderr); \
	exit(99); \
}while(0)

#define getcallerpc(a) __builtin_extract_return_addr(__builtin_return_address(0))
#define sys_setcallpc(arg) do{sl.cpc = getcallerpc(&arg); USED(arg);}while(0)
void sys_setcurrpc(int dummy);
void sys_seed(void *p, int sz);

#define nil NULL
#define USED(x) ((void)(x))
#define nelem(x) (int)(sizeof(x)/sizeof((x)[0]))

#if !defined(UBSAN)
#if defined(__386__) || defined(__x86_64__) || defined(__aarch64__)
#define MEM_UNALIGNED_ACCESS
#endif
#endif

#include "inc/cc.h"
#include "inc/mem.h"
#include "mp.h"
#include "utf.h"