static uchar*
unsqzseg(int fd, uchar *wp, long ns, ulong top)
{
Squeeze sq3, sq4;
if(ns == 0)
return wp;
if(rdtab(fd, &sq3, 0) < 0)
return nil;
if(rdtab(fd, &sq4, 8) < 0)
return nil;
fprint(2, "tables: %d %d\n", sq3.n, sq4.n);
if(read(fd, bigb, ns) != ns)
return nil;
return unsqueeze(wp, bigb, bigb+ns, &sq3, &sq4, top);
}
dsk_err_t sq_open(COMPRESS_DATA *self)
{
SQ_COMPRESS_DATA *sq_self;
dsk_err_t err;
unsigned short magic;
/* Sanity check: Is this meant for our driver? */
if (self->cd_class != &cc_sq) return DSK_ERR_BADPTR;
sq_self = (SQ_COMPRESS_DATA *)self;
sq_self->sq_truename = NULL;
sq_self->fp_in = NULL;
sq_self->fp_out = NULL;
/* Open the file to decompress */
err = comp_fopen(self, &sq_self->fp_in);
if (err) return DSK_ERR_NOTME;
/* Check for SQ signature */
err = readu(sq_self, &magic);
if (err) /* v1.1.11 Don't leak file handles */
{
fclose(sq_self->fp_in);
return err;
}
if (magic != MAGIC)
{
fclose(sq_self->fp_in);
return DSK_ERR_NOTME;
}
/* OK. This is a Squeezed file. Decompress it. */
rewind(sq_self->fp_in);
err = comp_mktemp(self, &sq_self->fp_out);
if (!err) err = unsqueeze(sq_self);
fclose(sq_self->fp_in);
if (sq_self->fp_out) fclose(sq_self->fp_out);
if (err && sq_self->sq_truename) free(sq_self->sq_truename);
return err;
}
