/* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2006 Mark Adler
+ * Copyright (C) 1995-2009 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
state->wbits = windowBits;
state->wsize = 1U << windowBits;
state->window = window;
- state->write = 0;
+ state->wnext = 0;
state->whave = 0;
return Z_OK;
}
/* handle error breaks in while */
if (state->mode == BAD) break;
- /* build code tables */
+ /* check for end-of-block code (better have one) */
+ if (state->lens[256] == 0) {
+ strm->msg = (char *)"invalid code -- missing end-of-block";
+ state->mode = BAD;
+ break;
+ }
+
+ /* build code tables -- note: do not change the lenbits or distbits
+ values here (9 and 6) without reading the comments in inftrees.h
+ concerning the ENOUGH constants, which depend on those values */
state->next = state->codes;
state->lencode = (code const FAR *)(state->next);
state->lenbits = 9;