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/RISCOS/unixstuff.c

http://unladen-swallow.googlecode.com/
C | 74 lines | 58 code | 13 blank | 3 comment | 8 complexity | 8fda7123b13ca2b94bc81512db24704e MD5 | raw file
 1/* Fudge unix isatty and fileno for RISCOS */
 2
 3#include "unixstuff.h"
 4#include <math.h>
 5#include <time.h>
 6#include "oslib/osfile.h"
 7
 8int fileno(FILE *f)
 9{ return (int)f;
10}
11
12int isatty(int fn)
13{ return (fn==fileno(stdin));
14}
15
16bits unixtime(bits ld,bits ex)
17{ ld&=0xFF;
18  ld-=51;
19  if(ex<1855547904U) ld--;
20  ex-=1855548004U;
21  return ex/100+42949673U*ld-ld/25;
22}
23
24
25/* from RISC OS infozip, preserves filetype in ld */
26int acorntime(bits *ex, bits *ld, time_t utime)
27{
28   unsigned timlo;      /* 3 lower bytes of acorn file-time plus carry byte */
29   unsigned timhi;      /* 2 high bytes of acorn file-time */
30
31   timlo = ((unsigned)utime & 0x00ffffffU) * 100 + 0x00996a00U;
32   timhi = ((unsigned)utime >> 24);
33   timhi = timhi * 100 + 0x0000336eU + (timlo >> 24);
34   if (timhi & 0xffff0000U)
35       return 1;        /* calculation overflow, do not change time */
36
37   /* insert the five time bytes into loadaddr and execaddr variables */
38   *ex = (timlo & 0x00ffffffU) | ((timhi & 0x000000ffU) << 24);
39   *ld = (*ld & 0xffffff00U)   | ((timhi >> 8) & 0x000000ffU);
40
41   return 0;            /* subject to future extension to signal overflow */
42}
43
44
45int isdir(char *fn)
46{ int ob;
47  if(xosfile_read_stamped_no_path(fn,&ob,0,0,0,0,0)) return 0;
48  switch (ob)
49  {   case osfile_IS_DIR:return 1;
50    case osfile_IS_IMAGE:return 1;
51  }
52  return 0;
53}
54
55int isfile(char *fn)
56{ int ob;
57  if(xosfile_read_stamped_no_path(fn,&ob,0,0,0,0,0)) return 0;
58  switch (ob)
59  {  case osfile_IS_FILE:return 1;
60    case osfile_IS_IMAGE:return 1;
61  }
62  return 0;
63}
64
65int object_exists(char *fn)
66{ int ob;
67  if(xosfile_read_stamped_no_path(fn,&ob,0,0,0,0,0)) return 0;
68  switch (ob)
69  {  case osfile_IS_FILE:return 1;
70      case osfile_IS_DIR:return 1;
71    case osfile_IS_IMAGE:return 1;
72  }
73  return 0;
74}