/* Fudge unix isatty and fileno for RISCOS */

#include "unixstuff.h"

#include <math.h>

#include <time.h>

#include "oslib/osfile.h"

int fileno(FILE *f)

{ return (int)f;

}

int isatty(int fn)

{ return (fn==fileno(stdin));

}

bits unixtime(bits ld,bits ex)

{ ld&=0xFF;

  ld-=51;

  if(ex<1855547904U) ld--;

  ex-=1855548004U;

  return ex/100+42949673U*ld-ld/25;

}

/* from RISC OS infozip, preserves filetype in ld */

int acorntime(bits *ex, bits *ld, time_t utime)

{

   unsigned timlo;      /* 3 lower bytes of acorn file-time plus carry byte */

   unsigned timhi;      /* 2 high bytes of acorn file-time */

   timlo = ((unsigned)utime & 0x00ffffffU) * 100 + 0x00996a00U;

   timhi = ((unsigned)utime >> 24);

   timhi = timhi * 100 + 0x0000336eU + (timlo >> 24);

   if (timhi & 0xffff0000U)

       return 1;        /* calculation overflow, do not change time */

   /* insert the five time bytes into loadaddr and execaddr variables */

   *ex = (timlo & 0x00ffffffU) | ((timhi & 0x000000ffU) << 24);

   *ld = (*ld & 0xffffff00U)   | ((timhi >> 8) & 0x000000ffU);

   return 0;            /* subject to future extension to signal overflow */

}

int isdir(char *fn)

{ int ob;

  if(xosfile_read_stamped_no_path(fn,&ob,0,0,0,0,0)) return 0;

  switch (ob)

  {   case osfile_IS_DIR:return 1;

    case osfile_IS_IMAGE:return 1;

  }

  return 0;

}

int isfile(char *fn)

{ int ob;

  if(xosfile_read_stamped_no_path(fn,&ob,0,0,0,0,0)) return 0;

  switch (ob)

  {  case osfile_IS_FILE:return 1;

    case osfile_IS_IMAGE:return 1;

  }

  return 0;

}

int object_exists(char *fn)

{ int ob;

  if(xosfile_read_stamped_no_path(fn,&ob,0,0,0,0,0)) return 0;

  switch (ob)

  {  case osfile_IS_FILE:return 1;

      case osfile_IS_DIR:return 1;

    case osfile_IS_IMAGE:return 1;

  }

  return 0;

}