Lines Matching full:state
25 struct inflate_state *state; in zlib_inflateReset() local
27 if (strm == NULL || strm->state == NULL) return Z_STREAM_ERROR; in zlib_inflateReset()
28 state = (struct inflate_state *)strm->state; in zlib_inflateReset()
29 strm->total_in = strm->total_out = state->total = 0; in zlib_inflateReset()
32 state->mode = HEAD; in zlib_inflateReset()
33 state->last = 0; in zlib_inflateReset()
34 state->havedict = 0; in zlib_inflateReset()
35 state->dmax = 32768U; in zlib_inflateReset()
36 state->hold = 0; in zlib_inflateReset()
37 state->bits = 0; in zlib_inflateReset()
38 state->lencode = state->distcode = state->next = state->codes; in zlib_inflateReset()
41 state->wsize = 1U << state->wbits; in zlib_inflateReset()
42 state->write = 0; in zlib_inflateReset()
43 state->whave = 0; in zlib_inflateReset()
50 struct inflate_state *state; in zlib_inflateInit2() local
55 state = &WS(strm)->inflate_state; in zlib_inflateInit2()
56 strm->state = (struct internal_state *)state; in zlib_inflateInit2()
59 state->wrap = 0; in zlib_inflateInit2()
63 state->wrap = (windowBits >> 4) + 1; in zlib_inflateInit2()
68 state->wbits = (unsigned)windowBits; in zlib_inflateInit2()
69 state->window = &WS(strm)->working_window[0]; in zlib_inflateInit2()
75 Return state with length and distance decoding tables and index sizes set to
78 static void zlib_fixedtables(struct inflate_state *state) in zlib_fixedtables() argument
81 state->lencode = lenfix; in zlib_fixedtables()
82 state->lenbits = 9; in zlib_fixedtables()
83 state->distcode = distfix; in zlib_fixedtables()
84 state->distbits = 5; in zlib_fixedtables()
103 struct inflate_state *state; in zlib_updatewindow() local
106 state = (struct inflate_state *)strm->state; in zlib_updatewindow()
108 /* copy state->wsize or less output bytes into the circular window */ in zlib_updatewindow()
110 if (copy >= state->wsize) { in zlib_updatewindow()
111 memcpy(state->window, strm->next_out - state->wsize, state->wsize); in zlib_updatewindow()
112 state->write = 0; in zlib_updatewindow()
113 state->whave = state->wsize; in zlib_updatewindow()
116 dist = state->wsize - state->write; in zlib_updatewindow()
118 memcpy(state->window + state->write, strm->next_out - copy, dist); in zlib_updatewindow()
121 memcpy(state->window, strm->next_out - copy, copy); in zlib_updatewindow()
122 state->write = copy; in zlib_updatewindow()
123 state->whave = state->wsize; in zlib_updatewindow()
126 state->write += dist; in zlib_updatewindow()
127 if (state->write == state->wsize) state->write = 0; in zlib_updatewindow()
128 if (state->whave < state->wsize) state->whave += dist; in zlib_updatewindow()
148 struct inflate_state *state; in zlib_inflateSyncPacket() local
150 if (strm == NULL || strm->state == NULL) return Z_STREAM_ERROR; in zlib_inflateSyncPacket()
151 state = (struct inflate_state *)strm->state; in zlib_inflateSyncPacket()
153 if (state->mode == STORED && state->bits == 0) { in zlib_inflateSyncPacket()
154 state->mode = TYPE; in zlib_inflateSyncPacket()
165 /* Load registers with state in inflate() for speed */
172 hold = state->hold; \
173 bits = state->bits; \
176 /* Restore state from registers in inflate() */
183 state->hold = hold; \
184 state->bits = bits; \
236 inflate() uses a state machine to process as much input data and generate as
237 much output data as possible before returning. The state machine is
240 for (;;) switch (state) {
246 state = STATEm;
253 next state. The NEEDBITS() macro is usually the way the state evaluates
276 state information is maintained to continue the loop where it left off
278 would all have to actually be part of the saved state in case NEEDBITS()
287 state = STATEx;
290 As shown above, if the next state is also the next case, then the break
293 A state may also return if there is not enough output space available to
294 complete that state. Those states are copying stored data, writing a
319 struct inflate_state *state; in zlib_inflate() local
338 if (strm == NULL || strm->state == NULL || in zlib_inflate()
342 state = (struct inflate_state *)strm->state; in zlib_inflate()
344 if (state->mode == TYPE) state->mode = TYPEDO; /* skip check */ in zlib_inflate()
350 switch (state->mode) { in zlib_inflate()
352 if (state->wrap == 0) { in zlib_inflate()
353 state->mode = TYPEDO; in zlib_inflate()
360 state->mode = BAD; in zlib_inflate()
365 state->mode = BAD; in zlib_inflate()
370 if (len > state->wbits) { in zlib_inflate()
372 state->mode = BAD; in zlib_inflate()
375 state->dmax = 1U << len; in zlib_inflate()
376 strm->adler = state->check = zlib_adler32(0L, NULL, 0); in zlib_inflate()
377 state->mode = hold & 0x200 ? DICTID : TYPE; in zlib_inflate()
382 strm->adler = state->check = REVERSE(hold); in zlib_inflate()
384 state->mode = DICT; in zlib_inflate()
386 if (state->havedict == 0) { in zlib_inflate()
390 strm->adler = state->check = zlib_adler32(0L, NULL, 0); in zlib_inflate()
391 state->mode = TYPE; in zlib_inflate()
395 if (state->last) { in zlib_inflate()
397 state->mode = CHECK; in zlib_inflate()
401 state->last = BITS(1); in zlib_inflate()
405 state->mode = STORED; in zlib_inflate()
408 zlib_fixedtables(state); in zlib_inflate()
409 state->mode = LEN; /* decode codes */ in zlib_inflate()
412 state->mode = TABLE; in zlib_inflate()
416 state->mode = BAD; in zlib_inflate()
425 state->mode = BAD; in zlib_inflate()
428 state->length = (unsigned)hold & 0xffff; in zlib_inflate()
430 state->mode = COPY; in zlib_inflate()
432 copy = state->length; in zlib_inflate()
442 state->length -= copy; in zlib_inflate()
445 state->mode = TYPE; in zlib_inflate()
449 state->nlen = BITS(5) + 257; in zlib_inflate()
451 state->ndist = BITS(5) + 1; in zlib_inflate()
453 state->ncode = BITS(4) + 4; in zlib_inflate()
456 if (state->nlen > 286 || state->ndist > 30) { in zlib_inflate()
458 state->mode = BAD; in zlib_inflate()
462 state->have = 0; in zlib_inflate()
463 state->mode = LENLENS; in zlib_inflate()
465 while (state->have < state->ncode) { in zlib_inflate()
467 state->lens[order[state->have++]] = (unsigned short)BITS(3); in zlib_inflate()
470 while (state->have < 19) in zlib_inflate()
471 state->lens[order[state->have++]] = 0; in zlib_inflate()
472 state->next = state->codes; in zlib_inflate()
473 state->lencode = (code const *)(state->next); in zlib_inflate()
474 state->lenbits = 7; in zlib_inflate()
475 ret = zlib_inflate_table(CODES, state->lens, 19, &(state->next), in zlib_inflate()
476 &(state->lenbits), state->work); in zlib_inflate()
479 state->mode = BAD; in zlib_inflate()
482 state->have = 0; in zlib_inflate()
483 state->mode = CODELENS; in zlib_inflate()
485 while (state->have < state->nlen + state->ndist) { in zlib_inflate()
487 this = state->lencode[BITS(state->lenbits)]; in zlib_inflate()
494 state->lens[state->have++] = this.val; in zlib_inflate()
500 if (state->have == 0) { in zlib_inflate()
502 state->mode = BAD; in zlib_inflate()
505 len = state->lens[state->have - 1]; in zlib_inflate()
523 if (state->have + copy > state->nlen + state->ndist) { in zlib_inflate()
525 state->mode = BAD; in zlib_inflate()
529 state->lens[state->have++] = (unsigned short)len; in zlib_inflate()
534 if (state->mode == BAD) break; in zlib_inflate()
537 state->next = state->codes; in zlib_inflate()
538 state->lencode = (code const *)(state->next); in zlib_inflate()
539 state->lenbits = 9; in zlib_inflate()
540 ret = zlib_inflate_table(LENS, state->lens, state->nlen, &(state->next), in zlib_inflate()
541 &(state->lenbits), state->work); in zlib_inflate()
544 state->mode = BAD; in zlib_inflate()
547 state->distcode = (code const *)(state->next); in zlib_inflate()
548 state->distbits = 6; in zlib_inflate()
549 ret = zlib_inflate_table(DISTS, state->lens + state->nlen, state->ndist, in zlib_inflate()
550 &(state->next), &(state->distbits), state->work); in zlib_inflate()
553 state->mode = BAD; in zlib_inflate()
556 state->mode = LEN; in zlib_inflate()
565 this = state->lencode[BITS(state->lenbits)]; in zlib_inflate()
572 this = state->lencode[last.val + in zlib_inflate()
580 state->length = (unsigned)this.val; in zlib_inflate()
582 state->mode = LIT; in zlib_inflate()
586 state->mode = TYPE; in zlib_inflate()
591 state->mode = BAD; in zlib_inflate()
594 state->extra = (unsigned)(this.op) & 15; in zlib_inflate()
595 state->mode = LENEXT; in zlib_inflate()
597 if (state->extra) { in zlib_inflate()
598 NEEDBITS(state->extra); in zlib_inflate()
599 state->length += BITS(state->extra); in zlib_inflate()
600 DROPBITS(state->extra); in zlib_inflate()
602 state->mode = DIST; in zlib_inflate()
605 this = state->distcode[BITS(state->distbits)]; in zlib_inflate()
612 this = state->distcode[last.val + in zlib_inflate()
622 state->mode = BAD; in zlib_inflate()
625 state->offset = (unsigned)this.val; in zlib_inflate()
626 state->extra = (unsigned)(this.op) & 15; in zlib_inflate()
627 state->mode = DISTEXT; in zlib_inflate()
629 if (state->extra) { in zlib_inflate()
630 NEEDBITS(state->extra); in zlib_inflate()
631 state->offset += BITS(state->extra); in zlib_inflate()
632 DROPBITS(state->extra); in zlib_inflate()
635 if (state->offset > state->dmax) { in zlib_inflate()
637 state->mode = BAD; in zlib_inflate()
641 if (state->offset > state->whave + out - left) { in zlib_inflate()
643 state->mode = BAD; in zlib_inflate()
646 state->mode = MATCH; in zlib_inflate()
650 if (state->offset > copy) { /* copy from window */ in zlib_inflate()
651 copy = state->offset - copy; in zlib_inflate()
652 if (copy > state->write) { in zlib_inflate()
653 copy -= state->write; in zlib_inflate()
654 from = state->window + (state->wsize - copy); in zlib_inflate()
657 from = state->window + (state->write - copy); in zlib_inflate()
658 if (copy > state->length) copy = state->length; in zlib_inflate()
661 from = put - state->offset; in zlib_inflate()
662 copy = state->length; in zlib_inflate()
666 state->length -= copy; in zlib_inflate()
670 if (state->length == 0) state->mode = LEN; in zlib_inflate()
674 *put++ = (unsigned char)(state->length); in zlib_inflate()
676 state->mode = LEN; in zlib_inflate()
679 if (state->wrap) { in zlib_inflate()
683 state->total += out; in zlib_inflate()
685 strm->adler = state->check = in zlib_inflate()
686 UPDATE(state->check, put - out, out); in zlib_inflate()
689 REVERSE(hold)) != state->check) { in zlib_inflate()
691 state->mode = BAD; in zlib_inflate()
696 state->mode = DONE; in zlib_inflate()
713 error. Call zlib_updatewindow() to create and/or update the window state. in zlib_inflate()
717 if (state->wsize || (state->mode < CHECK && out != strm->avail_out)) in zlib_inflate()
724 state->total += out; in zlib_inflate()
725 if (state->wrap && out) in zlib_inflate()
726 strm->adler = state->check = in zlib_inflate()
727 UPDATE(state->check, strm->next_out - out, out); in zlib_inflate()
729 strm->data_type = state->bits + (state->last ? 64 : 0) + in zlib_inflate()
730 (state->mode == TYPE ? 128 : 0); in zlib_inflate()
744 if (strm == NULL || strm->state == NULL) in zlib_inflateEnd()
752 * i.e. no pending output but this should always be the case. The state must
759 struct inflate_state *state = (struct inflate_state *)z->state; in zlib_inflateIncomp() local
763 if (state->mode != TYPE && state->mode != HEAD) in zlib_inflateIncomp()
776 z->adler = state->check = in zlib_inflateIncomp()
777 UPDATE(state->check, z->next_in, z->avail_in); in zlib_inflateIncomp()
782 state->total += z->avail_in; in zlib_inflateIncomp()