1 /* inflate_util.c -- data and routines common to blocks and codes
2 * Copyright (C) 1995-2002 Mark Adler
3 * For conditions of distribution and use, see copyright notice in zlib.h
12 struct inflate_codes_state
{int dummy
;}; /* for buggy compilers */
14 /* And'ing with mask[n] masks the lower n bits */
15 uInt inflate_mask
[17] = {
17 0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
18 0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
22 /* copy as much as possible from the sliding window to the output area */
23 #if defined(__VISAGECPP__) /* Visualage can't handle this antiquated interface */
24 int inflate_flush(inflate_blocks_statef
* s
, z_streamp z
, int r
)
26 int inflate_flush(s
, z
, r
)
27 inflate_blocks_statef
*s
;
36 /* local copies of source and destination pointers */
40 /* compute number of bytes to copy as far as end of window */
41 n
= (uInt
)((q
<= s
->write
? s
->write
: s
->end
) - q
);
42 if (n
> z
->avail_out
) n
= z
->avail_out
;
43 if (n
&& r
== Z_BUF_ERROR
) r
= Z_OK
;
49 /* update check information */
50 if (s
->checkfn
!= Z_NULL
)
51 z
->adler
= s
->check
= (*s
->checkfn
)(s
->check
, q
, n
);
53 /* copy as far as end of window */
58 /* see if more to copy at beginning of window */
63 if (s
->write
== s
->end
)
66 /* compute bytes to copy */
67 n
= (uInt
)(s
->write
- q
);
68 if (n
> z
->avail_out
) n
= z
->avail_out
;
69 if (n
&& r
== Z_BUF_ERROR
) r
= Z_OK
;
75 /* update check information */
76 if (s
->checkfn
!= Z_NULL
)
77 z
->adler
= s
->check
= (*s
->checkfn
)(s
->check
, q
, n
);