#ifndef MINIMALSYS_H
#define MINIMALSYS_H

#include "int.h"

void exit(int8_t status);

#define STDIN  0
#define STDOUT 1
#define STDERR 2
intptr_t write(int32_t fd, const void* buf, intptr_t size);
intptr_t read(int32_t fd, const void* buf, intptr_t size);

#define O_RDONLY       00
#define O_WRONLY       01
#define O_RDWR         02
#define AT_FDCWD      -100

#if defined(__mips__)
  // linux/arch/mips/include/uapi/asm/fcntl.h
  #define O_APPEND	0x0008
  #define O_CREAT		0x0100	/* not fcntl */
  #define O_TRUNC		0x0200	/* not fcntl */
  #define O_EXCL		0x0400	/* not fcntl */
  #define O_NOCTTY	0x0800	/* not fcntl */
#else
  // linux/include/uapi/asm-generic/fcntl.h
  #define O_CREAT        1<<6
  #define O_EXCL         1<<7
  #define O_NOCTTY       1<<8
  #define O_TRUNC        1<<9
  #define O_APPEND       1<<10
#endif 
int32_t openat(int32_t fd, const char* filename, uint32_t flags, uint32_t mode);
#define open(...) openat(AT_FDCWD, __VA_ARGS__, 0)
#define openc(...) openat(AT_FDCWD, __VA_ARGS__)
int close(unsigned int fd);
int fsync(unsigned int fd);

// Socket syscalls
int socket(int domain, int type, int protocol);
int setsockopt(int sockfd, int level, int optname, const void* optval, uint64_t optlen);
int bind(int sockfd, const void* sockaddr, uint64_t addrlen);
int listen(int fd, int backlog);
int accept(int sockfd, void* addr, uint64_t* addrlen);
int connect(int sockfd, void* addr, uint64_t addrlen);
int64_t sendto(int sockfd, const void* buf, uint64_t size, int flags, const void* sockaddr, uint64_t addrlen);
#define send(sockfd, buf, size, flags) sendto(sockfd, buf, size, flags, 0, 0)
int64_t recvfrom(int sockfd, const void* buf, uint64_t size, int flags, const void* sockaddr, uint64_t addrlen);
#define recv(sockfd, buf, size, flags) recvfrom(sockfd, buf, size, flags, 0, 0)
// Socket Domain constants
typedef unsigned short  sa_family_t;
/* Supported address families. */
#define AF_UNIX     1   /* Unix domain sockets      */
#define AF_LOCAL    1   /* POSIX name for AF_UNIX   */
#define AF_INET     2   /* Internet IP Protocol     */
#define AF_AX25     3   /* Amateur Radio AX.25      */
#define AF_INET6    10  /* IP version 6         */
#define AF_ROSE     11  /* Amateur Radio X.25 PLP   */
#define AF_PACKET   17  /* Packet family        */
#define AF_CAN      29  /* Controller Area Network      */
#define AF_BLUETOOTH    31  /* Bluetooth sockets        */
// Socket type constants
enum sock_type {
SOCK_STREAM = 1,
SOCK_DGRAM  = 2,
SOCK_RAW    = 3,
SOCK_RDM    = 4,
SOCK_SEQPACKET  = 5,
SOCK_DCCP   = 6,
SOCK_PACKET = 10,
};

#if defined(__mips__)
  #define SOL_SOCKET    0xffff
#else
  #define SOL_SOCKET  1

  #define SO_DEBUG        1
  #define SO_REUSEADDR    2
  #define SO_TYPE         3
  #define SO_ERROR        4
  #define SO_DONTROUTE    5
  #define SO_BROADCAST    6
  #define SO_SNDBUF       7
  #define SO_RCVBUF       8
  #define SO_SNDBUFFORCE  32
  #define SO_RCVBUFFORCE  33
  #define SO_KEEPALIVE    9
  #define SO_OOBINLINE    10
  #define SO_NO_CHECK     11
  #define SO_PRIORITY     12
  #define SO_LINGER       13
  #define SO_BSDCOMPAT    14
  #define SO_REUSEPORT    15
  #define SO_PASSCRED     16
  #define SO_PEERCRED     17
  #define SO_RCVLOWAT     18
  #define SO_SNDLOWAT     19
  #define SO_RCVTIMEO     20
  #define SO_SNDTIMEO     21
#endif

uint32_t fork();

// Provide memset for clang
void *memset(void* s, int c, unsigned long n) {
  int8_t* mem = s;
  for(long int i = 0; i < n; ++i) mem[i] = c;
  return s;
}
#endif // !MINIMALSYS_H