sys/src/cmd/hjfs/conv.c

   1 #include <u.h>
   2 #include <libc.h>
   3 #include <thread.h>
   4 #include "dat.h"
   5 #include "fns.h"
   6
   7 #define GET8(x) {x = *p++;}
   8 #define GET16(x) {x = *p++; x |= *p++ << 8;}
   9 #define GET24(x) {x = *p++; x |= *p++ << 8; x |= *p++ << 16;}
  10 #define GET32(x) {x = *p++; x |= *p++ << 8; x |= *p++ << 16; x |= *p++ << 24;}
  11 #define GET64(x) \
  12                 {x = (uvlong) *p++; \
  13                 x |= (uvlong) *p++ << 8; \
  14                 x |= (uvlong) *p++ << 16; \
  15                 x |= (uvlong) *p++ << 24; \
  16                 x |= (uvlong) *p++ << 32; \
  17                 x |= (uvlong) *p++ << 40; \
  18                 x |= (uvlong) *p++ << 48; \
  19                 x |= (uvlong) *p++ << 56;}
  20 #define GETS(x, n) {memcpy(x, p, n); p += n;}
  21
  22 #define PUT8(x) {*p++ = x;}
  23 #define PUT16(x) {*p++ = x; *p++ = x >> 8;}
  24 #define PUT24(x) {*p++ = x; *p++ = x >> 8; *p++ = x >> 16;}
  25 #define PUT32(x) {*p++ = x; *p++ = x >> 8; *p++ = x >> 16; *p++ = x >> 24;}
  26 #define PUT64(x) \
  27                 {*p++ = x; \
  28                 *p++ = x >> 8; \
  29                 *p++ = x >> 16; \
  30                 *p++ = x >> 24; \
  31                 *p++ = x >> 32; \
  32                 *p++ = x >> 40; \
  33                 *p++ = x >> 48; \
  34                 *p++ = x >> 56;}
  35 #define PUTS(x, n) {memcpy(p, x, n); p += n;}
  36
  37 void
  38 unpack(Buf *b, uchar *p)
  39 {
  40         Dentry *d;
  41         int i;
  42
  43         switch(b->type = *p++){
  44         default:
  45                 memcpy(b->data, p, RBLOCK);
  46                 break;
  47         case TSUPERBLOCK:
  48                 GET32(b->sb.magic);
  49                 GET64(b->sb.size);
  50                 GET64(b->sb.fstart);
  51                 GET64(b->sb.fend);
  52                 GET64(b->sb.root);
  53                 GET64(b->sb.qidpath);
  54                 break;
  55         case TDENTRY:
  56                 for(d = b->de; d < &b->de[DEPERBLK]; d++){
  57                         GETS(d->name, NAMELEN);
  58                         GET16(d->uid);
  59                         GET16(d->muid);
  60                         GET16(d->gid);
  61                         GET16(d->mode);
  62                         GET64(d->path);
  63                         GET32(d->vers);
  64                         GET8(d->type);
  65                         GET64(d->size);
  66                         for(i = 0; i < NDIRECT; i++)
  67                                 GET64(d->db[i]);
  68                         for(i = 0; i < NINDIRECT; i++)
  69                                 GET64(d->ib[i]);
  70                         GET64(d->atime);
  71                         GET64(d->mtime);
  72                 }
  73                 break;
  74         case TINDIR:
  75                 for(i = 0; i < OFFPERBLK; i++)
  76                         GET64(b->offs[i]);
  77                 break;
  78         case TREF:
  79                 for(i = 0; i < REFPERBLK; i++)
  80                         GET24(b->refs[i]);
  81                 break;
  82         }
  83         USED(p);
  84 }
  85
  86 void
  87 pack(Buf *b, uchar *p)
  88 {
  89         Dentry *d;
  90         int i;
  91
  92         switch(*p++ = b->type){
  93         case TRAW:
  94                 memcpy(p, b->data, RBLOCK);
  95                 break;
  96
  97         case TSUPERBLOCK:
  98                 PUT32(b->sb.magic);
  99                 PUT64(b->sb.size);
 100                 PUT64(b->sb.fstart);
 101                 PUT64(b->sb.fend);
 102                 PUT64(b->sb.root);
 103                 PUT64(b->sb.qidpath);
 104                 break;
 105         case TDENTRY:
 106                 for(d = b->de; d < b->de + nelem(b->de); d++){
 107                         PUTS(d->name, NAMELEN);
 108                         PUT16(d->uid);
 109                         PUT16(d->muid);
 110                         PUT16(d->gid);
 111                         PUT16(d->mode);
 112                         PUT64(d->path);
 113                         PUT32(d->vers);
 114                         PUT8(d->type);
 115                         PUT64(d->size);
 116                         for(i = 0; i < NDIRECT; i++)
 117                                 PUT64(d->db[i]);
 118                         for(i = 0; i < NINDIRECT; i++)
 119                                 PUT64(d->ib[i]);
 120                         PUT64(d->atime);
 121                         PUT64(d->mtime);
 122                 }
 123                 break;
 124         case TINDIR:
 125                 for(i = 0; i < OFFPERBLK; i++)
 126                         PUT64(b->offs[i]);
 127                 break;
 128         case TREF:
 129                 for(i = 0; i < REFPERBLK; i++)
 130                         PUT24(b->refs[i]);
 131                 break;
 132         default:
 133                 abort();
 134         }
 135         USED(p);
 136 }
 137