fix core:os

core/os/os_haiku.odin

@@ -22,6 +22,59 @@ stdin:  Handle = 0
 stdout: Handle = 1
 stderr: Handle = 2
 
+pid_t :: distinct i32
+off_t :: distinct i64
+dev_t :: distinct i32
+ino_t :: distinct i64
+mode_t :: distinct u32
+nlink_t :: distinct i32
+uid_t :: distinct u32
+gid_t :: distinct u32
+blksize_t :: distinct i32
+blkcnt_t :: distinct i64
+
+
+Unix_File_Time :: struct {
+	seconds:     time_t,
+	nanoseconds: c.long,
+}
+
+OS_Stat :: struct {
+	device_id: dev_t,		// device ID that this file resides on
+	serial: ino_t,			// this file's serial inode ID
+	mode: mode_t,			// file mode (rwx for user, group, etc)
+	nlink: nlink_t,			// number of hard links to this file
+	uid: uid_t,			// user ID of the file's owner
+	gid: gid_t,			// group ID of the file's group
+	size: off_t,			// file size, in bytes
+	rdev: dev_t,			// device type (not used)
+	block_size:	blksize_t,	// optimal blocksize for I/O
+	
+	last_access: Unix_File_Time,	// time of last access
+	modified: Unix_File_Time,	// time of last data modification
+	status_change: Unix_File_Time,	// time of last file status change
+	birthtime:	Unix_File_Time,	// time of file creation
+
+	type: u32                       // attribute/index type
+
+	blocks: blkcnt_t,		// blocks allocated for file
+}
+
+/* file access modes for open() */
+O_RDONLY         :: 0x0000		/* read only */
+O_WRONLY         :: 0x0001		/* write only */
+O_RDWR           :: 0x0002		/* read and write */
+O_ACCMODE        :: 0x0003		/* mask to get the access modes above */
+O_RWMASK         :: O_ACCMODE
+
+/* flags for open() */
+O_EXCL           :: 0x0100		/* exclusive creat */
+O_CREAT          :: 0x0200		/* create and open file */
+O_TRUNC          :: 0x0400		/* open with truncation */
+O_NOCTTY         :: 0x1000		/* don't make tty the controlling tty */
+O_NOTRAVERSE     :: 0x2000		/* do not traverse leaf link */
+
+
 foreign libc {
 	@(link_name="_errnop")	__error		:: proc() -> ^c.int ---
 
@@ -102,6 +155,51 @@ close :: proc(fd: Handle) -> Errno {
 	return ERROR_NONE
 }
 
+// In practice a read/write call would probably never read/write these big buffers all at once,
+// which is why the number of bytes is returned and why there are procs that will call this in a
+// loop for you.
+// We set a max of 1GB to keep alignment and to be safe.
+@(private)
+MAX_RW :: 1 << 30
+
+read :: proc(fd: Handle, data: []byte) -> (int, Errno) {
+	to_read    := min(c.size_t(len(data)), MAX_RW)
+	bytes_read := _unix_read(fd, &data[0], to_read)
+	if bytes_read == -1 {
+		return -1, Errno(get_last_error())
+	}
+	return int(bytes_read), ERROR_NONE
+}
+
+write :: proc(fd: Handle, data: []byte) -> (int, Errno) {
+	if len(data) == 0 {
+		return 0, ERROR_NONE
+	}
+
+	to_write      := min(c.size_t(len(data)), MAX_RW)
+	bytes_written := _unix_write(fd, &data[0], to_write)
+	if bytes_written == -1 {
+		return -1, Errno(get_last_error())
+	}
+	return int(bytes_written), ERROR_NONE
+}
+
+seek :: proc(fd: Handle, offset: i64, whence: int) -> (i64, Errno) {
+	res := _unix_seek(fd, offset, c.int(whence))
+	if res == -1 {
+		return -1, Errno(get_last_error())
+	}
+	return res, ERROR_NONE
+}
+
+file_size :: proc(fd: Handle) -> (i64, Errno) {
+	s, err := _fstat(fd)
+	if err != ERROR_NONE {
+		return -1, err
+	}
+	return s.size, ERROR_NONE
+}
+
 _alloc_command_line_arguments :: proc() -> []string {
 	res := make([]string, len(runtime.args__))
 	for arg, i in runtime.args__ {