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
fileno(FILE * f)8 int fileno(FILE *f)
9 { return (int)f;
10 }
11
isatty(int fn)12 int isatty(int fn)
13 { return (fn==fileno(stdin));
14 }
15
unixtime(bits ld,bits ex)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 */
acorntime(bits * ex,bits * ld,time_t utime)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
isdir(char * fn)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
isfile(char * fn)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
object_exists(char * fn)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