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Current File : //etc/ldap/../etckeeper/../../usr/include/node/../x86_64-linux-gnu/bits/fenv.h
/* Copyright (C) 1997-2020 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#ifndef _FENV_H
# error "Never use <bits/fenv.h> directly; include <fenv.h> instead."
#endif

/* Define bits representing the exception.  We use the bit positions
   of the appropriate bits in the FPU control word.  */
enum
  {
    FE_INVALID =
#define FE_INVALID	0x01
      FE_INVALID,
    __FE_DENORM = 0x02,
    FE_DIVBYZERO =
#define FE_DIVBYZERO	0x04
      FE_DIVBYZERO,
    FE_OVERFLOW =
#define FE_OVERFLOW	0x08
      FE_OVERFLOW,
    FE_UNDERFLOW =
#define FE_UNDERFLOW	0x10
      FE_UNDERFLOW,
    FE_INEXACT =
#define FE_INEXACT	0x20
      FE_INEXACT
  };

#define FE_ALL_EXCEPT \
	(FE_INEXACT | FE_DIVBYZERO | FE_UNDERFLOW | FE_OVERFLOW | FE_INVALID)

/* The ix87 FPU supports all of the four defined rounding modes.  We
   use again the bit positions in the FPU control word as the values
   for the appropriate macros.  */
enum
  {
    FE_TONEAREST =
#define FE_TONEAREST	0
      FE_TONEAREST,
    FE_DOWNWARD =
#define FE_DOWNWARD	0x400
      FE_DOWNWARD,
    FE_UPWARD =
#define FE_UPWARD	0x800
      FE_UPWARD,
    FE_TOWARDZERO =
#define FE_TOWARDZERO	0xc00
      FE_TOWARDZERO
  };


/* Type representing exception flags.  */
typedef unsigned short int fexcept_t;


/* Type representing floating-point environment.  This structure
   corresponds to the layout of the block written by the `fstenv'
   instruction and has additional fields for the contents of the MXCSR
   register as written by the `stmxcsr' instruction.  */
typedef struct
  {
    unsigned short int __control_word;
    unsigned short int __glibc_reserved1;
    unsigned short int __status_word;
    unsigned short int __glibc_reserved2;
    unsigned short int __tags;
    unsigned short int __glibc_reserved3;
    unsigned int __eip;
    unsigned short int __cs_selector;
    unsigned int __opcode:11;
    unsigned int __glibc_reserved4:5;
    unsigned int __data_offset;
    unsigned short int __data_selector;
    unsigned short int __glibc_reserved5;
#ifdef __x86_64__
    unsigned int __mxcsr;
#endif
  }
fenv_t;

/* If the default argument is used we use this value.  */
#define FE_DFL_ENV	((const fenv_t *) -1)

#ifdef __USE_GNU
/* Floating-point environment where none of the exception is masked.  */
# define FE_NOMASK_ENV	((const fenv_t *) -2)
#endif

#if __GLIBC_USE (IEC_60559_BFP_EXT_C2X)
/* Type representing floating-point control modes.  */
typedef struct
  {
    unsigned short int __control_word;
    unsigned short int __glibc_reserved;
    unsigned int __mxcsr;
  }
femode_t;

/* Default floating-point control modes.  */
# define FE_DFL_MODE	((const femode_t *) -1L)
#endif


#ifdef __USE_EXTERN_INLINES
__BEGIN_DECLS

/* Optimized versions.  */
#ifndef _LIBC
extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept);
#endif
__extern_always_inline void
__NTH (__feraiseexcept_invalid_divbyzero (int __excepts))
{
  if ((FE_INVALID & __excepts) != 0)
    {
      /* One example of an invalid operation is 0.0 / 0.0.  */
      float __f = 0.0;

# ifdef __SSE_MATH__
      __asm__ __volatile__ ("divss %0, %0 " : : "x" (__f));
# else
      __asm__ __volatile__ ("fdiv %%st, %%st(0); fwait"
			    : "=t" (__f) : "0" (__f));
# endif
      (void) &__f;
    }
  if ((FE_DIVBYZERO & __excepts) != 0)
    {
      float __f = 1.0;
      float __g = 0.0;

# ifdef __SSE_MATH__
      __asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g));
# else
      __asm__ __volatile__ ("fdivp %%st, %%st(1); fwait"
			    : "=t" (__f) : "0" (__f), "u" (__g) : "st(1)");
# endif
      (void) &__f;
    }
}
__extern_inline int
__NTH (feraiseexcept (int __excepts))
{
  if (__builtin_constant_p (__excepts)
      && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
    {
      __feraiseexcept_invalid_divbyzero (__excepts);
      return 0;
    }

  return __feraiseexcept_renamed (__excepts);
}

__END_DECLS
#endif

NineSec Team - 2022
Name
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Last Modified
Owner
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..
--
December 13 2023 9:42:27
root
0755
types
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December 13 2023 9:42:27
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a.out.h
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argp-ldbl.h
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auxv.h
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byteswap.h
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cmathcalls.h
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confname.h
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cpu-set.h
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dirent.h
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dirent_ext.h
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dlfcn.h
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elfclass.h
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endian.h
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endianness.h
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environments.h
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epoll.h
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err-ldbl.h
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errno.h
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error-ldbl.h
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error.h
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eventfd.h
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fcntl-linux.h
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fcntl.h
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fcntl2.h
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fenv.h
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fenvinline.h
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floatn-common.h
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floatn.h
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flt-eval-method.h
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fp-fast.h
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fp-logb.h
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getopt_core.h
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getopt_ext.h
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getopt_posix.h
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hwcap.h
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in.h
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indirect-return.h
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initspin.h
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inotify.h
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ioctl-types.h
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ioctls.h
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ipc-perm.h
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ipc.h
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ipctypes.h
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link.h
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local_lim.h
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locale.h
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long-double.h
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math-vector.h
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mathcalls-helper-functions.h
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mathcalls-narrow.h
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mathcalls.h
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mathdef.h
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mathinline.h
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mman-linux.h
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mman-map-flags-generic.h
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mqueue.h
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mqueue2.h
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msq-pad.h
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msq.h
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netdb.h
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param.h
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poll.h
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poll2.h
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posix1_lim.h
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posix_opt.h
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printf-ldbl.h
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procfs-extra.h
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procfs-id.h
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procfs.h
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pthreadtypes.h
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ptrace-shared.h
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resource.h
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sched.h
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select.h
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select2.h
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sem-pad.h
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sem.h
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semaphore.h
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setjmp.h
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setjmp2.h
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shm-pad.h
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shm.h
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shmlba.h
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sigaction.h
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sigcontext.h
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sigevent-consts.h
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siginfo-arch.h
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siginfo-consts-arch.h
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siginfo-consts.h
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signal_ext.h
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signalfd.h
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signum-generic.h
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signum.h
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sigstack.h
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sigthread.h
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sockaddr.h
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socket-constants.h
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socket.h
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socket2.h
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socket_type.h
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ss_flags.h
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stab.def
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stat.h
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statfs.h
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statvfs.h
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statx-generic.h
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statx.h
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stdint-intn.h
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stdint-uintn.h
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stdio-ldbl.h
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stdio.h
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stdio2.h
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stdio_lim.h
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stdlib-bsearch.h
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stdlib-float.h
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stdlib-ldbl.h
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stdlib.h
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string_fortified.h
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strings_fortified.h
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struct_mutex.h
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struct_rwlock.h
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sys_errlist.h
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syscall.h
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sysctl.h
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syslog-ldbl.h
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syslog-path.h
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syslog.h
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sysmacros.h
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termios-baud.h
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termios-c_cc.h
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termios-c_cflag.h
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termios-c_iflag.h
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termios-c_lflag.h
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termios-c_oflag.h
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termios-misc.h
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termios-struct.h
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termios-tcflow.h
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termios.h
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thread-shared-types.h
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time.h
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time64.h
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timerfd.h
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timesize.h
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timex.h
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types.h
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typesizes.h
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uintn-identity.h
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uio-ext.h
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uio_lim.h
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unistd.h
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unistd_ext.h
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utmp.h
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utmpx.h
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utsname.h
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waitflags.h
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waitstatus.h
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wchar-ldbl.h
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wchar.h
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wchar2.h
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wctype-wchar.h
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wordsize.h
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xopen_lim.h
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NineSec Team - 2022