static int32_t
parsecksum(char *cksum, char *name)
{
Hdr *hp;
return hdrotoull(cksum, cksum + sizeof hp->chksum, (uint64_t)-1LL,
name, "checksum");
}
static long
parsecksum(char *cksum, char *name)
{
Hdr *hp;
return hdrotoull(cksum, cksum + sizeof hp->chksum, (uvlong)-1LL,
name, "checksum");
}
/*
* return the nominal size from the header block, which is not always the
* size in the archive (the archive size may be zero for some file types
* regardless of the nominal size).
*
* gnu and freebsd tars are now recording int64_ts as big-endian binary
* with a flag in byte 0 to indicate this, which permits file sizes up to
* 2^64-1 (actually 2^80-1 but our file sizes are int64_ts) rather than 2^33-1.
*/
static Off
hdrsize(Hdr *hp)
{
unsigned char *p;
if((unsigned char)hp->size[0] == Binnegsz) {
fprint(2, "%s: %s: negative length, which is insane\n",
argv0, name(hp));
return 0;
} else if((unsigned char)hp->size[0] == Binsize) {
p = (unsigned char *)hp->size + sizeof hp->size - 1 -
sizeof(int64_t); /* -1 for terminating space */
return G8BEBYTE(p);
}
return hdrotoull(hp->size, hp->size + sizeof hp->size, 0,
name(hp), "size");
}
