/***************************************************************
  CPU-TIME-LINUX.H

       Linux/i386/ILP32 conversion helpers for the MCPU time ABI.

       PART OF : CPU - library .

       USAGE   : Internal only .

       Copyright (C) 2026  by Andrew V.Kosteltsev.
       All Rights Reserved.
 ***************************************************************/

#ifndef   __CPU_TIME_LINUX_H
#define   __CPU_TIME_LINUX_H

#include <errno.h>
#include <time.h>


static int
__cpu_clockid_to_host( __mpu_uint64_t clockid, clockid_t *host_clockid )
{
  if( !host_clockid ) return( __MCPU_EFAULT );

  switch( clockid )
  {
  case __CPU_CLOCK_REALTIME:
    *host_clockid = CLOCK_REALTIME;
    return( 0 );
  case __CPU_CLOCK_MONOTONIC:
    *host_clockid = CLOCK_MONOTONIC;
    return( 0 );
  default:
    return( __MCPU_EINVAL );
  }

} /* End of __cpu_clockid_to_host() */


static int
__cpu_timespec_from_host( struct __cpu_timespec *dst,
                          const struct timespec *src )
{
  __mpu_int64_t sec;
  __mpu_int64_t nsec;

  if( !dst || !src ) return( __MCPU_EFAULT );

  sec = (__mpu_int64_t)src->tv_sec;
  if( (time_t)sec != src->tv_sec ) return( __MCPU_EOVERFLOW );

  nsec = (__mpu_int64_t)src->tv_nsec;
  if( (long)nsec != src->tv_nsec ) return( __MCPU_EOVERFLOW );
  if( nsec < 0 || nsec > 999999999 ) return( __MCPU_EOVERFLOW );

  dst->tv_sec = sec;
  dst->tv_nsec = nsec;

  return( 0 );

} /* End of __cpu_timespec_from_host() */

#endif /* __CPU_TIME_LINUX_H */