138 lines
2.7 KiB
C
138 lines
2.7 KiB
C
#include <u.h>
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#include <lib9.h>
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#include <thread.h>
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#include "dat.h"
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#include "fns.h"
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#define GET8(x) {x = *p++;}
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#define GET16(x) {x = *p++; x |= *p++ << 8;}
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#define GET24(x) {x = *p++; x |= *p++ << 8; x |= *p++ << 16;}
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#define GET32(x) {x = *p++; x |= *p++ << 8; x |= *p++ << 16; x |= *p++ << 24;}
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#define GET64(x) \
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{x = (uint64_t) *p++; \
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x |= (uint64_t) *p++ << 8; \
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x |= (uint64_t) *p++ << 16; \
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x |= (uint64_t) *p++ << 24; \
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x |= (uint64_t) *p++ << 32; \
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x |= (uint64_t) *p++ << 40; \
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x |= (uint64_t) *p++ << 48; \
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x |= (uint64_t) *p++ << 56;}
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#define GETS(x, n) {memcpy(x, p, n); p += n;}
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#define PUT8(x) {*p++ = x;}
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#define PUT16(x) {*p++ = x; *p++ = x >> 8;}
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#define PUT24(x) {*p++ = x; *p++ = x >> 8; *p++ = x >> 16;}
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#define PUT32(x) {*p++ = x; *p++ = x >> 8; *p++ = x >> 16; *p++ = x >> 24;}
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#define PUT64(x) \
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{*p++ = x; \
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*p++ = x >> 8; \
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*p++ = x >> 16; \
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*p++ = x >> 24; \
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*p++ = x >> 32; \
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*p++ = x >> 40; \
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*p++ = x >> 48; \
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*p++ = x >> 56;}
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#define PUTS(x, n) {memcpy(p, x, n); p += n;}
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void
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unpack(Buf *b, uint8_t *p)
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{
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Dentry *d;
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int i;
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switch(b->type = *p++){
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default:
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memcpy(b->data, p, RBLOCK);
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break;
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case TSUPERBLOCK:
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GET32(b->sb.magic);
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GET64(b->sb.size);
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GET64(b->sb.fstart);
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GET64(b->sb.fend);
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GET64(b->sb.root);
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GET64(b->sb.qidpath);
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break;
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case TDENTRY:
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for(d = b->de; d < &b->de[DEPERBLK]; d++){
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GETS(d->name, NAMELEN);
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GET16(d->uid);
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GET16(d->muid);
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GET16(d->gid);
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GET16(d->mode);
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GET64(d->path);
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GET32(d->vers);
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GET8(d->type);
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GET64(d->size);
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for(i = 0; i < NDIRECT; i++)
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GET64(d->db[i]);
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for(i = 0; i < NINDIRECT; i++)
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GET64(d->ib[i]);
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GET64(d->atime);
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GET64(d->mtime);
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}
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break;
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case TINDIR:
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for(i = 0; i < OFFPERBLK; i++)
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GET64(b->offs[i]);
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break;
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case TREF:
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for(i = 0; i < REFPERBLK; i++)
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GET24(b->refs[i]);
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break;
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}
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USED(p);
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}
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void
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pack(Buf *b, uint8_t *p)
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{
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Dentry *d;
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int i;
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switch(*p++ = b->type){
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case TRAW:
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memcpy(p, b->data, RBLOCK);
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break;
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case TSUPERBLOCK:
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PUT32(b->sb.magic);
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PUT64(b->sb.size);
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PUT64(b->sb.fstart);
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PUT64(b->sb.fend);
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PUT64(b->sb.root);
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PUT64(b->sb.qidpath);
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break;
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case TDENTRY:
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for(d = b->de; d < b->de + nelem(b->de); d++){
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PUTS(d->name, NAMELEN);
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PUT16(d->uid);
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PUT16(d->muid);
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PUT16(d->gid);
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PUT16(d->mode);
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PUT64(d->path);
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PUT32(d->vers);
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PUT8(d->type);
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PUT64(d->size);
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for(i = 0; i < NDIRECT; i++)
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PUT64(d->db[i]);
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for(i = 0; i < NINDIRECT; i++)
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PUT64(d->ib[i]);
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PUT64(d->atime);
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PUT64(d->mtime);
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}
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break;
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case TINDIR:
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for(i = 0; i < OFFPERBLK; i++)
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PUT64(b->offs[i]);
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break;
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case TREF:
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for(i = 0; i < REFPERBLK; i++)
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PUT24(b->refs[i]);
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break;
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default:
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abort();
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}
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USED(p);
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}
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