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 
8 int fileno(FILE *f)
9 { return (int)f;
10 }
11 
12 int isatty(int fn)
13 { return (fn==fileno(stdin));
14 }
15 
16 bits 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 */
26 int 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 
45 int 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 
55 int 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 
65 int 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 }
75