inflate_blocks_statef *inflate_blocks_new( z_streamp z, check_func c, uInt w) { inflate_blocks_statef *s; if ((s = (inflate_blocks_statef *)ZALLOC (z,1,sizeof(struct inflate_blocks_state))) == Z_NULL) return s; if ((s->hufts = (inflate_huft *)ZALLOC(z, sizeof(inflate_huft), MANY)) == Z_NULL) { ZFREE(z, s); return Z_NULL; } if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL) { ZFREE(z, s->hufts); ZFREE(z, s); return Z_NULL; } s->end = s->window + w; s->checkfn = c; s->mode = TYPE; Tracev((stderr, "inflate: blocks allocated\n")); inflate_blocks_reset(s, z, Z_NULL); return s; }
int ZEXPORT inflateBackEnd(z_streamp strm) { if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0) return Z_STREAM_ERROR; ZFREE(strm, strm->state); strm->state = Z_NULL; Tracev((stderr, "inflate: end\n")); return Z_OK; }
inflate_codes_statef *inflate_codes_new(uInt bl, uInt bd, inflate_huft *tl, inflate_huft *td, z_streamp z) { inflate_codes_statef *c; if ((c = (inflate_codes_statef *) ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL) { c->mode = START; c->lbits = (Byte)bl; c->dbits = (Byte)bd; c->ltree = tl; c->dtree = td; Tracev((stderr, "inflate: codes new\n")); } return c; }
local inflate_codes_statef *inflate_codes_new( /* bl, bd, tl, td, z) */ uInt bl, uInt bd, inflate_huft *tl, inflate_huft *td, /* need separate declaration for Borland C++ */ z_streamp z ) { inflate_codes_statef *c; if ((c = (inflate_codes_statef *) ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL) { c->mode = START; c->lbits = (Byte)bl; c->dbits = (Byte)bd; c->ltree = tl; c->dtree = td; Tracev((stderr, "inflate: codes new\n")); } return c; }
void inflate_blocks_reset( inflate_blocks_statef *s, z_streamp z, uLongf *c) { if (c != Z_NULL) *c = s->check; if (s->mode == BTREE || s->mode == DTREE) ZFREE(z, s->sub.trees.blens); if (s->mode == CODES) inflate_codes_free(s->sub.decode.codes, z); s->mode = TYPE; #ifdef DEFL64 s->treetype = 0; #endif s->bitk = 0; s->bitb = 0; s->read = s->write = s->window; if (s->checkfn != Z_NULL) z->adler = s->check = (*s->checkfn)(0L, (const Bytef *)Z_NULL, 0); Tracev((stderr, "inflate: blocks reset\n")); }
int inflate_blocks( inflate_blocks_statef *s, z_streamp z, int r) { uInt t; /* temporary storage */ uLong b; /* bit buffer */ uInt k; /* bits in bit buffer */ Bytef *p; /* input data pointer */ uInt n; /* bytes available there */ Bytef *q; /* output window write pointer */ uInt m; /* bytes to end of window or read pointer */ /* copy input/output information to locals (UPDATE macro restores) */ LOAD /* process input based on current state */ while (1) switch (s->mode) { case TYPE: NEEDBITS(3) t = (uInt)b & 7; s->last = t & 1; switch (t >> 1) { case 0: /* stored */ Tracev((stderr, "inflate: stored block%s\n", s->last ? " (last)" : "")); DUMPBITS(3) t = k & 7; /* go to byte boundary */ DUMPBITS(t) s->mode = LENS; /* get length of stored block */ break; case 1: /* fixed */ Tracev((stderr, "inflate: fixed codes block%s\n", s->last ? " (last)" : "")); { #ifndef DEFL64 uInt bl, bd; inflate_huft *tl, *td; inflate_trees_fixed(&bl, &bd, &tl, &td, z); s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z); if (s->sub.decode.codes == Z_NULL) { r = Z_MEM_ERROR; LEAVE } #else if (s->treetype != (uInt)z->state->method) { s->treetype = z->state->method; inflate_trees_fixed(z->state->method, &s->bl, &s->bd, &s->tl, &s->td, s->hufts, z); } s->sub.decode.codes = inflate_codes_new(s->bl, s->bd, s->tl, s->td, z); if (s->sub.decode.codes == Z_NULL) { r = Z_MEM_ERROR; LEAVE } #endif } DUMPBITS(3) s->mode = CODES; break; case 2: /* dynamic */ Tracev((stderr, "inflate: dynamic codes block%s\n", s->last ? " (last)" : "")); DUMPBITS(3) s->mode = TABLE; break; case 3: /* illegal */ DUMPBITS(3) s->mode = BAD2; z->msg = (char*)"invalid block type"; r = Z_DATA_ERROR; LEAVE }