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// @adjivas - github.com/adjivas. See the LICENSE
// file at the top-level directory of this distribution and at
// https://github.com/adjivas/io
//
// This file may not be copied, modified, or distributed
// except according to those terms.

#![allow(dead_code)]
#![allow(non_camel_case_types)]

/// The `NCCS` const is the default number of character
/// parsed by the password input.

pub const NCCS: usize = 32;

/// The `BUFF` and `STDIN_FILENO` const
/// are default values for macros.

pub const BUFF: usize = 2048;
pub const BUFF_READ_NUMBER: usize = 17;
pub const BUFF_READ_COMMAND: usize = 9;
pub const STDIN_FILENO: i32 = 0;

#[repr(C)]
#[derive(Copy, Clone)]
pub struct Termios {
    pub c_iflag: u32,  // input mode flags.
    pub c_oflag: u32,  // output mode flags.
    pub c_cflag: u32,  // control mode flags.
    pub c_lflag: u32,  // local mode flags.
    pub c_line: u8,       // line discipline.
    pub c_cc: [u8; NCCS], // control characters.
    pub c_ispeed: u32,  // input speed.
    pub c_ospeed: u32,  // output speed.
}

/// All the `const *` are default values
/// of c_cc.

#[repr(C)]
#[derive(Copy, Clone)]
pub enum ControlCharacter {
    VINTR    =  0,
    VQUIT    =  1,
    VERASE   =  2,
    VKILL    =  3,
    VEOF     =  4,
    VTIME    =  5,
    VMIN     =  6,
    VSWTC    =  7,
    VSTART   =  8,
    VSTOP    =  9,
    VSUSP    = 10,
    VEOL     = 11,
    VREPRINT = 12,
    VDISCARD = 13,
    VWERASE  = 14,
    VLNEXT   = 15,
    VEOL2    = 16,
}

/// All the `const *` are default values
/// of c_iflag.

#[repr(C)]
#[derive(Copy, Clone)]
pub enum InputModes {
    IGNBRK  = 0o000001,
    BRKINT  = 0o000002,
    IGNPAR  = 0o000004,
    PARMRK  = 0o000010,
    INPCK   = 0o000020,
    ISTRIP  = 0o000040,
    INLCR   = 0o000100,
    IGNCR   = 0o000200,
    ICRNL   = 0o000400,
    IUCLC   = 0o001000,
    IXON    = 0o002000,
    IXANY   = 0o004000,
    IXOFF   = 0o010000,
    IMAXBEL = 0o020000,
    IUTF8   = 0o040000,
}

/// All the `const *` are default values
/// of c_oflag.

#[repr(C)]
#[derive(Copy, Clone)]
pub enum OutputModes {
    OPOST  = 0o000001,
    OLCUC  = 0o000002,
    ONLCR  = 0o000004,
    OCRNL  = 0o000010,
    ONOCR  = 0o000020,
    ONLRET = 0o000040,
    OFILL  = 0o000100,
    OFDEL  = 0o000200,
    VT0    = 0o000000,
    VT1    = 0o040000,
}

/// All the `const *` are default values
/// of c_cflag.

#[repr(C)]
#[derive(Copy, Clone)]
pub enum Speed {
    B0       = 0o000000,     /* hang up */
    B50      = 0o000001,
    B75      = 0o000002,
    B110     = 0o000003,
    B134     = 0o000004,
    B150     = 0o000005,
    B200     = 0o000006,
    B300     = 0o000007,
    B600     = 0o000010,
    B1200    = 0o000011,
    B1800    = 0o000012,
    B2400    = 0o000013,
    B4800    = 0o000014,
    B9600    = 0o000015,
    B19200   = 0o000016,
    B38400   = 0o000017,
    B57600   = 0o010001,
    B115200  = 0o010002,
    B230400  = 0o010003,
    B460800  = 0o010004,
    B500000  = 0o010005,
    B576000  = 0o010006,
    B921600  = 0o010007,
    B1000000 = 0o010010,
    B1152000 = 0o010011,
    B1500000 = 0o010012,
    B2000000 = 0o010013,
    B2500000 = 0o010014,
    B3000000 = 0o010015,
    B3500000 = 0o010016,
    B4000000 = 0o010017,
}

/// All the `const *` are default values
/// of c_lflag.

#[repr(C)]
#[derive(Copy, Clone)]
pub enum LocalModes {
    ECHO   = 0o000010,
    ECHOE  = 0o000020,
    ECHOK  = 0o000040,
    ECHONL = 0o000100,
    NOFLSH = 0o000200,
    TOSTOP = 0o000400,
    ISIG   = 0o000001,
    ICANON = 0o000002,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum TermiosControl {
    GETS  = 0x5401,
    SETS  = 0x5402,
    SETSW = 0x5403,
    SETSF = 0x5404,
    GETA  = 0x5405,
    SETA  = 0x5406,
    SETAW = 0x5407,
    SETAF = 0x5408,
    SBRK  = 0x5409,
    XONC  = 0x540a,
    FLSH  = 0x540b,
}

#[repr(C)]
#[derive(Copy, Clone)]
pub enum Seek {
    SET = 0,
    CUR = 1,
    END = 2,
}

/// The `C` extern is list of system call from libc required
/// by the standard in/out put.

#[cfg(any(unix))]
extern "C" {
    pub fn write(fd: i32, buf: *const i8, len: i32) -> i32;
    pub fn lseek(fd: i32, offset: u64, whence: i32) -> u64;
    pub fn read(fd: i32, buf: *mut i8, len: i32) -> i32;
    pub fn ioctl(fd: i32, req: u64, term: *mut Termios) -> i32;
}