#include <thread.h>

#include <u.h>
#include <libc.h>
#include <thread.h>
#include "dat.h"
#include "fns.h"

#define GET8(x) {x = *p++;}
#define GET16(x) {x = *p++; x |= *p++ << 8;}
#define GET24(x) {x = *p++; x |= *p++ << 8; x |= *p++ << 16;}
#define GET32(x) {x = *p++; x |= *p++ << 8; x |= *p++ << 16; x |= *p++ << 24;}
#define GET64(x) \
{x = (uvlong) *p++; \
x |= (uvlong) *p++ << 8; \
x |= (uvlong) *p++ << 16; \
x |= (uvlong) *p++ << 24; \
x |= (uvlong) *p++ << 32; \
x |= (uvlong) *p++ << 40; \
x |= (uvlong) *p++ << 48; \
x |= (uvlong) *p++ << 56;}
#define GETS(x, n) {memcpy(x, p, n); p += n;}

#define PUT8(x) {*p++ = x;}
#define PUT16(x) {*p++ = x; *p++ = x >> 8;}
#define PUT24(x) {*p++ = x; *p++ = x >> 8; *p++ = x >> 16;}
#define PUT32(x) {*p++ = x; *p++ = x >> 8; *p++ = x >> 16; *p++ = x >> 24;}
#define PUT64(x) \
{*p++ = x; \
*p++ = x >> 8; \
*p++ = x >> 16; \
*p++ = x >> 24; \
*p++ = x >> 32; \
*p++ = x >> 40; \
*p++ = x >> 48; \
*p++ = x >> 56;}
#define PUTS(x, n) {memcpy(p, x, n); p += n;}

void
unpack(Buf *b, uchar *p)
{
Dentry *d;
int i;

switch(b->type = *p++){
default:
memcpy(b->data, p, RBLOCK);
break;
case TSUPERBLOCK:
GET32(b->sb.magic);
GET64(b->sb.size);
GET64(b->sb.fstart);
GET64(b->sb.fend);
GET64(b->sb.root);
GET64(b->sb.qidpath);
break;
case TDENTRY:
for(d = b->de; d < &b->de[DEPERBLK]; d++){
GETS(d->name, NAMELEN);
GET16(d->uid);
GET16(d->muid);
GET16(d->gid);
GET16(d->mode);
GET64(d->path);
GET32(d->vers);
GET8(d->type);
GET64(d->size);
for(i = 0; i < NDIRECT; i++)
GET64(d->db[i]);
for(i = 0; i < NINDIRECT; i++)
GET64(d->ib[i]);
GET64(d->atime);
GET64(d->mtime);
}
break;
case TINDIR:
for(i = 0; i < OFFPERBLK; i++)
GET64(b->offs[i]);
break;
case TREF:
for(i = 0; i < REFPERBLK; i++)
GET24(b->refs[i]);
break;
}
USED(p);
}

void
pack(Buf *b, uchar *p)
{
Dentry *d;
int i;

switch(*p++ = b->type){
case TRAW:
memcpy(p, b->data, RBLOCK);
break;

case TSUPERBLOCK:
PUT32(b->sb.magic);
PUT64(b->sb.size);
PUT64(b->sb.fstart);
PUT64(b->sb.fend);
PUT64(b->sb.root);
PUT64(b->sb.qidpath);
break;
case TDENTRY:
for(d = b->de; d < b->de + nelem(b->de); d++){
PUTS(d->name, NAMELEN);
PUT16(d->uid);
PUT16(d->muid);
PUT16(d->gid);
PUT16(d->mode);
PUT64(d->path);
PUT32(d->vers);
PUT8(d->type);
PUT64(d->size);
for(i = 0; i < NDIRECT; i++)
PUT64(d->db[i]);
for(i = 0; i < NINDIRECT; i++)
PUT64(d->ib[i]);
PUT64(d->atime);
PUT64(d->mtime);
}
break;
case TINDIR:
for(i = 0; i < OFFPERBLK; i++)
PUT64(b->offs[i]);
break;
case TREF:
for(i = 0; i < REFPERBLK; i++)
PUT24(b->refs[i]);
break;
default:
abort();
}
USED(p);
}