#pragma once

/* types declarations */
#include <arch/types.h>

#include <os/types.h>
#include <os/constants.h>
#include <os/errno.h>

// -----------------------------------------------------------------------
// global constants

/* open */
#define sys·ORead    0x0u
#define sys·OWrite   0x1u
#define sys·ORdwr    0x2u

/* seek */
#define sys·SeekSet  0u
#define sys·SeekCur  1u
#define sys·SeekEnd  2u

/* special file descriptors */
#define sys·Stdin  0
#define sys·Stdout 1
#define sys·Stderr 2

// -----------------------------------------------------------------------
// functions

/* errors */
char *sys·errormsg(int num);

/* file operations */
int sys·open(char *path, int flag, int mode, int *fd);
int sys·close(int fd);
int sys·write(int fd, uintptr len, void *buf, intptr *nw);
int sys·read(int fd, uintptr len, void *buf, intptr *nr);
int sys·seek(int fd, intptr offset, int from, intptr *pos);

int sys·info(char *path, sys·Info *ret);
int sys·infofd(int fd, sys·Info *ret);
int sys·infoat(int dirfd, char *path, int flag, uint mask, sys·Info *ret);

int sys·dup(int from, int to);

/* directory operations */
int sys·chdir(char *path);
int sys·chdirfd(int fd);
int sys·mkdir(char *path, uint mode);
int sys·mkdirat(int fd, char *path, uint mode);

int sys·direntry(int fd, int len, void *buffer, uintptr *size);

/* file node */
int sys·mknode(char *path, uint mode, uint64 dev);
int sys·mknodeat(int dirfd, char *path, uint mode, uint64 device);

/* ioctl :( */
int sys·ioctl(int, int, ...);

/* process operations */
int sys·getpid(void);
int sys·getuid(void);
int sys·getgid(void);

int sys·getpgid(int pid);
int sys·setpgid(int pid, int pgid);

int sys·fork(void);
int sys·exec(char *program, char *argv[], char *env[]);

int sys·wait(int *status);
int sys·waitfor(int pid, int *status, int option, sys·UsageInfo *msg);

/* memory operations */
int sys·brk(void *addr);
//int sys·sbrk(intptr delta, void **ret);

int sys·mmap(void *addr, uintptr len, int prot, int flags, int fd, intptr off, void **ret);
int sys·mremap(void *old, uintptr from, uintptr to, int flags, void **new);
int sys·munmap(void *addr, uintptr len);
int sys·madvise(void *addr, uintptr len, int advice);
int sys·mprotect(void *addr, uintptr len, int prot);
int sys·mlock(void *addr, uintptr len);
int sys·munlock(void *addr, uintptr len);