sys/src/libventi/dtype.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <venti.h>
   4
   5 enum {
   6         OVtErrType,             /* illegal */
   7
   8         OVtRootType,
   9         OVtDirType,
  10         OVtPointerType0,
  11         OVtPointerType1,
  12         OVtPointerType2,
  13         OVtPointerType3,
  14         OVtPointerType4,
  15         OVtPointerType5,
  16         OVtPointerType6,
  17         OVtPointerType7,                /* not used */
  18         OVtPointerType8,                /* not used */
  19         OVtPointerType9,                /* not used */
  20         OVtDataType,
  21
  22         OVtMaxType
  23 };
  24
  25
  26 uint todisk[] = {
  27         OVtDataType,
  28         OVtPointerType0,
  29         OVtPointerType1,
  30         OVtPointerType2,
  31         OVtPointerType3,
  32         OVtPointerType4,
  33         OVtPointerType5,
  34         OVtPointerType6,
  35         OVtDirType,
  36         OVtPointerType0,
  37         OVtPointerType1,
  38         OVtPointerType2,
  39         OVtPointerType3,
  40         OVtPointerType4,
  41         OVtPointerType5,
  42         OVtPointerType6,
  43         OVtRootType,
  44 };
  45
  46 uint fromdisk[] = {
  47         VtCorruptType,
  48         VtRootType,
  49         VtDirType,
  50         VtDirType+1,
  51         VtDirType+2,
  52         VtDirType+3,
  53         VtDirType+4,
  54         VtDirType+5,
  55         VtDirType+6,
  56         VtDirType+7,
  57         VtCorruptType,
  58         VtCorruptType,
  59         VtCorruptType,
  60         VtDataType,
  61 };
  62
  63 uint
  64 vttodisktype(uint n)
  65 {
  66         if(n >= nelem(todisk))
  67                 return VtCorruptType;
  68         return todisk[n];
  69 }
  70
  71 uint
  72 vtfromdisktype(uint n)
  73 {
  74         if(n >= nelem(fromdisk))
  75                 return VtCorruptType;
  76         return fromdisk[n];
  77 }
  78