from ctypes import *
from ctypes.wintypes import HANDLE
from ctypes.wintypes import BOOL
from ctypes.wintypes import LPCWSTR
_stdcall_libraries = {}
_stdcall_libraries['kernel32'] = WinDLL('kernel32')
from ctypes.wintypes import DWORD
from ctypes.wintypes import WORD
from ctypes.wintypes import BYTE

INVALID_HANDLE_VALUE = HANDLE(-1).value

# some details of the windows API differ between 32 and 64 bit systems..
def is_64bit():
"""Returns true when running on a 64 bit system"""
return sizeof(c_ulong) != sizeof(c_void_p)

# ULONG_PTR is a an ordinary number, not a pointer and contrary to the name it
# is either 32 or 64 bits, depending on the type of windows...
# so test if this a 32 bit windows...
if is_64bit():
# assume 64 bits
ULONG_PTR = c_int64
else:
# 32 bits
ULONG_PTR = c_ulong


class _SECURITY_ATTRIBUTES(Structure):
pass
LPSECURITY_ATTRIBUTES = POINTER(_SECURITY_ATTRIBUTES)


try:
CreateEventW = _stdcall_libraries['kernel32'].CreateEventW
except AttributeError:
# Fallback to non wide char version for old OS...
from ctypes.wintypes import LPCSTR
CreateEventA = _stdcall_libraries['kernel32'].CreateEventA
CreateEventA.restype = HANDLE
CreateEventA.argtypes = [LPSECURITY_ATTRIBUTES, BOOL, BOOL, LPCSTR]
CreateEvent=CreateEventA

CreateFileA = _stdcall_libraries['kernel32'].CreateFileA
CreateFileA.restype = HANDLE
CreateFileA.argtypes = [LPCSTR, DWORD, DWORD, LPSECURITY_ATTRIBUTES, DWORD, DWORD, HANDLE]
CreateFile = CreateFileA
else:
CreateEventW.restype = HANDLE
CreateEventW.argtypes = [LPSECURITY_ATTRIBUTES, BOOL, BOOL, LPCWSTR]
CreateEvent = CreateEventW # alias

CreateFileW = _stdcall_libraries['kernel32'].CreateFileW
CreateFileW.restype = HANDLE
CreateFileW.argtypes = [LPCWSTR, DWORD, DWORD, LPSECURITY_ATTRIBUTES, DWORD, DWORD, HANDLE]
CreateFile = CreateFileW # alias

class _OVERLAPPED(Structure):
pass
OVERLAPPED = _OVERLAPPED

class _COMSTAT(Structure):
pass
COMSTAT = _COMSTAT

class _DCB(Structure):
pass
DCB = _DCB

class _COMMTIMEOUTS(Structure):
pass
COMMTIMEOUTS = _COMMTIMEOUTS

GetLastError = _stdcall_libraries['kernel32'].GetLastError
GetLastError.restype = DWORD
GetLastError.argtypes = []

LPOVERLAPPED = POINTER(_OVERLAPPED)
LPDWORD = POINTER(DWORD)

GetOverlappedResult = _stdcall_libraries['kernel32'].GetOverlappedResult
GetOverlappedResult.restype = BOOL
GetOverlappedResult.argtypes = [HANDLE, LPOVERLAPPED, LPDWORD, BOOL]

ResetEvent = _stdcall_libraries['kernel32'].ResetEvent
ResetEvent.restype = BOOL
ResetEvent.argtypes = [HANDLE]

LPCVOID = c_void_p

WriteFile = _stdcall_libraries['kernel32'].WriteFile
WriteFile.restype = BOOL
WriteFile.argtypes = [HANDLE, LPCVOID, DWORD, LPDWORD, LPOVERLAPPED]

LPVOID = c_void_p

ReadFile = _stdcall_libraries['kernel32'].ReadFile
ReadFile.restype = BOOL
ReadFile.argtypes = [HANDLE, LPVOID, DWORD, LPDWORD, LPOVERLAPPED]

CloseHandle = _stdcall_libraries['kernel32'].CloseHandle
CloseHandle.restype = BOOL
CloseHandle.argtypes = [HANDLE]

ClearCommBreak = _stdcall_libraries['kernel32'].ClearCommBreak
ClearCommBreak.restype = BOOL
ClearCommBreak.argtypes = [HANDLE]

LPCOMSTAT = POINTER(_COMSTAT)

ClearCommError = _stdcall_libraries['kernel32'].ClearCommError
ClearCommError.restype = BOOL
ClearCommError.argtypes = [HANDLE, LPDWORD, LPCOMSTAT]

SetupComm = _stdcall_libraries['kernel32'].SetupComm
SetupComm.restype = BOOL
SetupComm.argtypes = [HANDLE, DWORD, DWORD]

EscapeCommFunction = _stdcall_libraries['kernel32'].EscapeCommFunction
EscapeCommFunction.restype = BOOL
EscapeCommFunction.argtypes = [HANDLE, DWORD]

GetCommModemStatus = _stdcall_libraries['kernel32'].GetCommModemStatus
GetCommModemStatus.restype = BOOL
GetCommModemStatus.argtypes = [HANDLE, LPDWORD]

LPDCB = POINTER(_DCB)

GetCommState = _stdcall_libraries['kernel32'].GetCommState
GetCommState.restype = BOOL
GetCommState.argtypes = [HANDLE, LPDCB]

LPCOMMTIMEOUTS = POINTER(_COMMTIMEOUTS)

GetCommTimeouts = _stdcall_libraries['kernel32'].GetCommTimeouts
GetCommTimeouts.restype = BOOL
GetCommTimeouts.argtypes = [HANDLE, LPCOMMTIMEOUTS]

PurgeComm = _stdcall_libraries['kernel32'].PurgeComm
PurgeComm.restype = BOOL
PurgeComm.argtypes = [HANDLE, DWORD]

SetCommBreak = _stdcall_libraries['kernel32'].SetCommBreak
SetCommBreak.restype = BOOL
SetCommBreak.argtypes = [HANDLE]

SetCommMask = _stdcall_libraries['kernel32'].SetCommMask
SetCommMask.restype = BOOL
SetCommMask.argtypes = [HANDLE, DWORD]

SetCommState = _stdcall_libraries['kernel32'].SetCommState
SetCommState.restype = BOOL
SetCommState.argtypes = [HANDLE, LPDCB]

SetCommTimeouts = _stdcall_libraries['kernel32'].SetCommTimeouts
SetCommTimeouts.restype = BOOL
SetCommTimeouts.argtypes = [HANDLE, LPCOMMTIMEOUTS]

WaitForSingleObject = _stdcall_libraries['kernel32'].WaitForSingleObject
WaitForSingleObject.restype = DWORD
WaitForSingleObject.argtypes = [HANDLE, DWORD]

ONESTOPBIT = 0 # Variable c_int
TWOSTOPBITS = 2 # Variable c_int
ONE5STOPBITS = 1

NOPARITY = 0 # Variable c_int
ODDPARITY = 1 # Variable c_int
EVENPARITY = 2 # Variable c_int
MARKPARITY = 3
SPACEPARITY = 4

RTS_CONTROL_HANDSHAKE = 2 # Variable c_int
RTS_CONTROL_DISABLE = 0 # Variable c_int
RTS_CONTROL_ENABLE = 1 # Variable c_int
RTS_CONTROL_TOGGLE = 3 # Variable c_int
SETRTS = 3
CLRRTS = 4

DTR_CONTROL_HANDSHAKE = 2 # Variable c_int
DTR_CONTROL_DISABLE = 0 # Variable c_int
DTR_CONTROL_ENABLE = 1 # Variable c_int
SETDTR = 5
CLRDTR = 6

MS_DSR_ON = 32 # Variable c_ulong
EV_RING = 256 # Variable c_int
EV_PERR = 512 # Variable c_int
EV_ERR = 128 # Variable c_int
SETXOFF = 1 # Variable c_int
EV_RXCHAR = 1 # Variable c_int
GENERIC_WRITE = 1073741824 # Variable c_long
PURGE_TXCLEAR = 4 # Variable c_int
FILE_FLAG_OVERLAPPED = 1073741824 # Variable c_int
EV_DSR = 16 # Variable c_int
MAXDWORD = 4294967295L # Variable c_uint
EV_RLSD = 32 # Variable c_int
ERROR_IO_PENDING = 997 # Variable c_long
MS_CTS_ON = 16 # Variable c_ulong
EV_EVENT1 = 2048 # Variable c_int
EV_RX80FULL = 1024 # Variable c_int
PURGE_RXABORT = 2 # Variable c_int
FILE_ATTRIBUTE_NORMAL = 128 # Variable c_int
PURGE_TXABORT = 1 # Variable c_int
SETXON = 2 # Variable c_int
OPEN_EXISTING = 3 # Variable c_int
MS_RING_ON = 64 # Variable c_ulong
EV_TXEMPTY = 4 # Variable c_int
EV_RXFLAG = 2 # Variable c_int
MS_RLSD_ON = 128 # Variable c_ulong
GENERIC_READ = 2147483648L # Variable c_ulong
EV_EVENT2 = 4096 # Variable c_int
EV_CTS = 8 # Variable c_int
EV_BREAK = 64 # Variable c_int
PURGE_RXCLEAR = 8 # Variable c_int
INFINITE = 0xFFFFFFFFL


class N11_OVERLAPPED4DOLLAR_48E(Union):
pass
class N11_OVERLAPPED4DOLLAR_484DOLLAR_49E(Structure):
pass
N11_OVERLAPPED4DOLLAR_484DOLLAR_49E._fields_ = [
('Offset', DWORD),
('OffsetHigh', DWORD),
]

PVOID = c_void_p

N11_OVERLAPPED4DOLLAR_48E._anonymous_ = ['_0']
N11_OVERLAPPED4DOLLAR_48E._fields_ = [
('_0', N11_OVERLAPPED4DOLLAR_484DOLLAR_49E),
('Pointer', PVOID),
]
_OVERLAPPED._anonymous_ = ['_0']
_OVERLAPPED._fields_ = [
('Internal', ULONG_PTR),
('InternalHigh', ULONG_PTR),
('_0', N11_OVERLAPPED4DOLLAR_48E),
('hEvent', HANDLE),
]
_SECURITY_ATTRIBUTES._fields_ = [
('nLength', DWORD),
('lpSecurityDescriptor', LPVOID),
('bInheritHandle', BOOL),
]
_COMSTAT._fields_ = [
('fCtsHold', DWORD, 1),
('fDsrHold', DWORD, 1),
('fRlsdHold', DWORD, 1),
('fXoffHold', DWORD, 1),
('fXoffSent', DWORD, 1),
('fEof', DWORD, 1),
('fTxim', DWORD, 1),
('fReserved', DWORD, 25),
('cbInQue', DWORD),
('cbOutQue', DWORD),
]
_DCB._fields_ = [
('DCBlength', DWORD),
('BaudRate', DWORD),
('fBinary', DWORD, 1),
('fParity', DWORD, 1),
('fOutxCtsFlow', DWORD, 1),
('fOutxDsrFlow', DWORD, 1),
('fDtrControl', DWORD, 2),
('fDsrSensitivity', DWORD, 1),
('fTXContinueOnXoff', DWORD, 1),
('fOutX', DWORD, 1),
('fInX', DWORD, 1),
('fErrorChar', DWORD, 1),
('fNull', DWORD, 1),
('fRtsControl', DWORD, 2),
('fAbortOnError', DWORD, 1),
('fDummy2', DWORD, 17),
('wReserved', WORD),
('XonLim', WORD),
('XoffLim', WORD),
('ByteSize', BYTE),
('Parity', BYTE),
('StopBits', BYTE),
('XonChar', c_char),
('XoffChar', c_char),
('ErrorChar', c_char),
('EofChar', c_char),
('EvtChar', c_char),
('wReserved1', WORD),
]
_COMMTIMEOUTS._fields_ = [
('ReadIntervalTimeout', DWORD),
('ReadTotalTimeoutMultiplier', DWORD),
('ReadTotalTimeoutConstant', DWORD),
('WriteTotalTimeoutMultiplier', DWORD),
('WriteTotalTimeoutConstant', DWORD),
]
__all__ = ['GetLastError', 'MS_CTS_ON', 'FILE_ATTRIBUTE_NORMAL',
'DTR_CONTROL_ENABLE', '_COMSTAT', 'MS_RLSD_ON',
'GetOverlappedResult', 'SETXON', 'PURGE_TXABORT',
'PurgeComm', 'N11_OVERLAPPED4DOLLAR_48E', 'EV_RING',
'ONESTOPBIT', 'SETXOFF', 'PURGE_RXABORT', 'GetCommState',
'RTS_CONTROL_ENABLE', '_DCB', 'CreateEvent',
'_COMMTIMEOUTS', '_SECURITY_ATTRIBUTES', 'EV_DSR',
'EV_PERR', 'EV_RXFLAG', 'OPEN_EXISTING', 'DCB',
'FILE_FLAG_OVERLAPPED', 'EV_CTS', 'SetupComm',
'LPOVERLAPPED', 'EV_TXEMPTY', 'ClearCommBreak',
'LPSECURITY_ATTRIBUTES', 'SetCommBreak', 'SetCommTimeouts',
'COMMTIMEOUTS', 'ODDPARITY', 'EV_RLSD',
'GetCommModemStatus', 'EV_EVENT2', 'PURGE_TXCLEAR',
'EV_BREAK', 'EVENPARITY', 'LPCVOID', 'COMSTAT', 'ReadFile',
'PVOID', '_OVERLAPPED', 'WriteFile', 'GetCommTimeouts',
'ResetEvent', 'EV_RXCHAR', 'LPCOMSTAT', 'ClearCommError',
'ERROR_IO_PENDING', 'EscapeCommFunction', 'GENERIC_READ',
'RTS_CONTROL_HANDSHAKE', 'OVERLAPPED',
'DTR_CONTROL_HANDSHAKE', 'PURGE_RXCLEAR', 'GENERIC_WRITE',
'LPDCB', 'CreateEventW', 'SetCommMask', 'EV_EVENT1',
'SetCommState', 'LPVOID', 'CreateFileW', 'LPDWORD',
'EV_RX80FULL', 'TWOSTOPBITS', 'LPCOMMTIMEOUTS', 'MAXDWORD',
'MS_DSR_ON', 'MS_RING_ON',
'N11_OVERLAPPED4DOLLAR_484DOLLAR_49E', 'EV_ERR',
'ULONG_PTR', 'CreateFile', 'NOPARITY', 'CloseHandle']