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<html><!-- Created using the cpp_pretty_printer from the dlib C++ library. See http://dlib.net for updates. --><head><title>dlib C++ Library - gzread.c</title></head><body bgcolor='white'><pre>
<font color='#009900'>/* gzread.c -- zlib functions for reading gzip files
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/</font>
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='gzguts.h.html'>gzguts.h</a>"
<font color='#009900'>/* Local functions */</font>
local <font color='#0000FF'><u>int</u></font> gz_load <b><a name='OF'></a>OF</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>gz_statep, <font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>, <font color='#0000FF'><u>unsigned</u></font>, <font color='#0000FF'><u>unsigned</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
local <font color='#0000FF'><u>int</u></font> gz_avail <b><a name='OF'></a>OF</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
local <font color='#0000FF'><u>int</u></font> gz_look <b><a name='OF'></a>OF</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
local <font color='#0000FF'><u>int</u></font> gz_decomp <b><a name='OF'></a>OF</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
local <font color='#0000FF'><u>int</u></font> gz_fetch <b><a name='OF'></a>OF</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
local <font color='#0000FF'><u>int</u></font> gz_skip <b><a name='OF'></a>OF</b><font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>gz_statep, z_off64_t<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#009900'>/* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from
state-&gt;fd, and update state-&gt;eof, state-&gt;err, and state-&gt;msg as appropriate.
This function needs to loop on read(), since read() is not guaranteed to
read the number of bytes requested, depending on the type of descriptor. */</font>
local <font color='#0000FF'><u>int</u></font> <b><a name='gz_load'></a>gz_load</b><font face='Lucida Console'>(</font>state, buf, len, have<font face='Lucida Console'>)</font>
gz_statep state;
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>buf;
<font color='#0000FF'><u>unsigned</u></font> len;
<font color='#0000FF'><u>unsigned</u></font> <font color='#5555FF'>*</font>have;
<b>{</b>
<font color='#0000FF'><u>int</u></font> ret;
<font color='#5555FF'>*</font>have <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>do</font> <b>{</b>
ret <font color='#5555FF'>=</font> <font color='#BB00BB'>read</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>fd, buf <font color='#5555FF'>+</font> <font color='#5555FF'>*</font>have, len <font color='#5555FF'>-</font> <font color='#5555FF'>*</font>have<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>&lt;</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>break</font>;
<font color='#5555FF'>*</font>have <font color='#5555FF'>+</font><font color='#5555FF'>=</font> ret;
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font><font color='#5555FF'>*</font>have <font color='#5555FF'>&lt;</font> len<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>&lt;</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_ERRNO, <font color='#BB00BB'>zstrerror</font><font face='Lucida Console'>(</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>eof <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* Load up input buffer and set eof flag if last data loaded -- return -1 on
error, 0 otherwise. Note that the eof flag is set when the end of the input
file is reached, even though there may be unused data in the buffer. Once
that data has been used, no more attempts will be made to read the file.
If strm-&gt;avail_in != 0, then the current data is moved to the beginning of
the input buffer, and then the remainder of the buffer is loaded with the
available data from the input file. */</font>
local <font color='#0000FF'><u>int</u></font> <b><a name='gz_avail'></a>gz_avail</b><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font>
gz_statep state;
<b>{</b>
<font color='#0000FF'><u>unsigned</u></font> got;
z_streamp strm <font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_BUF_ERROR<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>eof <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* copy what's there to the start */</font>
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>p <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in;
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'>const</font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>q <font color='#5555FF'>=</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_in;
<font color='#0000FF'><u>unsigned</u></font> n <font color='#5555FF'>=</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in;
<font color='#0000FF'>do</font> <b>{</b>
<font color='#5555FF'>*</font>p<font color='#5555FF'>+</font><font color='#5555FF'>+</font> <font color='#5555FF'>=</font> <font color='#5555FF'>*</font>q<font color='#5555FF'>+</font><font color='#5555FF'>+</font>;
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font><font color='#5555FF'>-</font><font color='#5555FF'>-</font>n<font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_load</font><font face='Lucida Console'>(</font>state, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in <font color='#5555FF'>+</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in,
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>-</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in, <font color='#5555FF'>&amp;</font>got<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>+</font><font color='#5555FF'>=</font> got;
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_in <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in;
<b>}</b>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* Look for gzip header, set up for inflate or copy. state-&gt;x.have must be 0.
If this is the first time in, allocate required memory. state-&gt;how will be
left unchanged if there is no more input data available, will be set to COPY
if there is no gzip header and direct copying will be performed, or it will
be set to GZIP for decompression. If direct copying, then leftover input
data from the input buffer will be copied to the output buffer. In that
case, all further file reads will be directly to either the output buffer or
a user buffer. If decompressing, the inflate state will be initialized.
gz_look() will return 0 on success or -1 on failure. */</font>
local <font color='#0000FF'><u>int</u></font> <b><a name='gz_look'></a>gz_look</b><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font>
gz_statep state;
<b>{</b>
z_streamp strm <font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font>;
<font color='#009900'>/* allocate read buffers and inflate memory */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* allocate buffers */</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font><font color='#BB00BB'>malloc</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>want<font face='Lucida Console'>)</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font><font color='#BB00BB'>malloc</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>want <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in<font face='Lucida Console'>)</font>;
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_MEM_ERROR, "<font color='#CC0000'>out of memory</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>want;
<font color='#009900'>/* allocate inflate memory */</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm.zalloc <font color='#5555FF'>=</font> Z_NULL;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm.zfree <font color='#5555FF'>=</font> Z_NULL;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm.opaque <font color='#5555FF'>=</font> Z_NULL;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm.avail_in <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm.next_in <font color='#5555FF'>=</font> Z_NULL;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>inflateInit2</font><font face='Lucida Console'>(</font><font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font>, <font color='#979000'>15</font> <font color='#5555FF'>+</font> <font color='#979000'>16</font><font face='Lucida Console'>)</font> <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* gunzip */</font>
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out<font face='Lucida Console'>)</font>;
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in<font face='Lucida Console'>)</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_MEM_ERROR, "<font color='#CC0000'>out of memory</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<b>}</b>
<font color='#009900'>/* get at least the magic bytes in the input buffer */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>&lt;</font> <font color='#979000'>2</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_avail</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* look for gzip magic bytes -- if there, do gzip decoding (note: there is
a logical dilemma here when considering the case of a partially written
gzip file, to wit, if a single 31 byte is written, then we cannot tell
whether this is a single-byte file, or just a partially written gzip
file -- for here we assume that if a gzip file is being written, then
the header will be written in a single operation, so that reading a
single byte is sufficient indication that it is not a gzip file) */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>&gt;</font> <font color='#979000'>1</font> <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font>
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_in[<font color='#979000'>0</font>] <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>31</font> <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_in[<font color='#979000'>1</font>] <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>139</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>inflateReset</font><font face='Lucida Console'>(</font>strm<font face='Lucida Console'>)</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font> GZIP;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>direct <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* no gzip header -- if we were decoding gzip before, then this is trailing
garbage. Ignore the trailing garbage and finish. */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>direct <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>eof <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* doing raw i/o, copy any leftover input to output -- this assumes that
the output buffer is larger than the input buffer, which also assures
space for gzungetc() */</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in<font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next, strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_in, strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in<font face='Lucida Console'>)</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in;
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<b>}</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font> COPY;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>direct <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* Decompress from input to the provided next_out and avail_out in the state.
On return, state-&gt;x.have and state-&gt;x.next point to the just decompressed
data. If the gzip stream completes, state-&gt;how is reset to LOOK to look for
the next gzip stream or raw data, once state-&gt;x.have is depleted. Returns 0
on success, -1 on failure. */</font>
local <font color='#0000FF'><u>int</u></font> <b><a name='gz_decomp'></a>gz_decomp</b><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font>
gz_statep state;
<b>{</b>
<font color='#0000FF'><u>int</u></font> ret <font color='#5555FF'>=</font> Z_OK;
<font color='#0000FF'><u>unsigned</u></font> had;
z_streamp strm <font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font>;
<font color='#009900'>/* fill output buffer up to end of deflate stream */</font>
had <font color='#5555FF'>=</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_out;
<font color='#0000FF'>do</font> <b>{</b>
<font color='#009900'>/* get more input for inflate() */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> <font color='#BB00BB'>gz_avail</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_BUF_ERROR, "<font color='#CC0000'>unexpected end of file</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>break</font>;
<b>}</b>
<font color='#009900'>/* decompress and handle errors */</font>
ret <font color='#5555FF'>=</font> <font color='#BB00BB'>inflate</font><font face='Lucida Console'>(</font>strm, Z_NO_FLUSH<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_STREAM_ERROR <font color='#5555FF'>|</font><font color='#5555FF'>|</font> ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_NEED_DICT<font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_STREAM_ERROR,
"<font color='#CC0000'>internal error: inflate stream corrupt</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_MEM_ERROR<font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_MEM_ERROR, "<font color='#CC0000'>out of memory</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_DATA_ERROR<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* deflate stream invalid */</font>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_DATA_ERROR,
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>msg <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL ? "<font color='#CC0000'>compressed data error</font>" : strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>msg<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_out <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> ret <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_STREAM_END<font face='Lucida Console'>)</font>;
<font color='#009900'>/* update available output */</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font> had <font color='#5555FF'>-</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_out;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>=</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_out <font color='#5555FF'>-</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have;
<font color='#009900'>/* if the gzip stream completed successfully, look for another */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_STREAM_END<font face='Lucida Console'>)</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font> LOOK;
<font color='#009900'>/* good decompression */</font>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* Fetch data and put it in the output buffer. Assumes state-&gt;x.have is 0.
Data is either copied from the input file or decompressed from the input
file depending on state-&gt;how. If state-&gt;how is LOOK, then a gzip header is
looked for to determine whether to copy or decompress. Returns -1 on error,
otherwise 0. gz_fetch() will leave state-&gt;how as COPY or GZIP unless the
end of the input file has been reached and all data has been processed. */</font>
local <font color='#0000FF'><u>int</u></font> <b><a name='gz_fetch'></a>gz_fetch</b><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font>
gz_statep state;
<b>{</b>
z_streamp strm <font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font>;
<font color='#0000FF'>do</font> <b>{</b>
<font color='#0000FF'>switch</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how<font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'>case</font> LOOK: <font color='#009900'>/* -&gt; LOOK, COPY (only if never GZIP), or GZIP */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_look</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font><font color='#5555FF'>=</font> LOOK<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<font color='#0000FF'>break</font>;
<font color='#0000FF'>case</font> COPY: <font color='#009900'>/* -&gt; COPY */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_load</font><font face='Lucida Console'>(</font>state, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font>, <font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
<font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out;
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<font color='#0000FF'>case</font> GZIP: <font color='#009900'>/* -&gt; GZIP or LOOK (if end of gzip stream) */</font>
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_out <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font>;
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_out <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_decomp</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>eof <font color='#5555FF'>|</font><font color='#5555FF'>|</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* Skip len uncompressed bytes of output. Return -1 on error, 0 on success. */</font>
local <font color='#0000FF'><u>int</u></font> <b><a name='gz_skip'></a>gz_skip</b><font face='Lucida Console'>(</font>state, len<font face='Lucida Console'>)</font>
gz_statep state;
z_off64_t len;
<b>{</b>
<font color='#0000FF'><u>unsigned</u></font> n;
<font color='#009900'>/* skip over len bytes or reach end-of-file, whichever comes first */</font>
<font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>len<font face='Lucida Console'>)</font>
<font color='#009900'>/* skip over whatever is in output buffer */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font face='Lucida Console'>)</font> <b>{</b>
n <font color='#5555FF'>=</font> <font color='#BB00BB'>GT_OFF</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font face='Lucida Console'>)</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> <font face='Lucida Console'>(</font>z_off64_t<font face='Lucida Console'>)</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>&gt;</font> len ?
<font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font><font face='Lucida Console'>)</font>len : state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>-</font><font color='#5555FF'>=</font> n;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.pos <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
len <font color='#5555FF'>-</font><font color='#5555FF'>=</font> n;
<b>}</b>
<font color='#009900'>/* output buffer empty -- return if we're at the end of the input */</font>
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>eof <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm.avail_in <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>break</font>;
<font color='#009900'>/* need more data to skip -- load up output buffer */</font>
<font color='#0000FF'>else</font> <b>{</b>
<font color='#009900'>/* get more output, looking for header if required */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_fetch</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* -- see zlib.h -- */</font>
<font color='#0000FF'><u>int</u></font> ZEXPORT <b><a name='gzread'></a>gzread</b><font face='Lucida Console'>(</font>file, buf, len<font face='Lucida Console'>)</font>
gzFile file;
voidp buf;
<font color='#0000FF'><u>unsigned</u></font> len;
<b>{</b>
<font color='#0000FF'><u>unsigned</u></font> got, n;
gz_statep state;
z_streamp strm;
<font color='#009900'>/* get internal structure */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>file <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
state <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font>file;
strm <font color='#5555FF'>=</font> <font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font>;
<font color='#009900'>/* check that we're reading and that there's no (serious) error */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mode <font color='#5555FF'>!</font><font color='#5555FF'>=</font> GZ_READ <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
<font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_BUF_ERROR<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#009900'>/* since an int is returned, make sure len fits in one, otherwise return
with an error (this avoids the flaw in the interface) */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font>len <font color='#5555FF'>&lt;</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_DATA_ERROR, "<font color='#CC0000'>requested length does not fit in int</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#009900'>/* if len is zero, avoid unnecessary operations */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>len <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
<font color='#009900'>/* process a skip request */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>seek<font face='Lucida Console'>)</font> <b>{</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>seek <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_skip</font><font face='Lucida Console'>(</font>state, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>skip<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#009900'>/* get len bytes to buf, or less than len if at the end */</font>
got <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>do</font> <b>{</b>
<font color='#009900'>/* first just try copying data from the output buffer */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font face='Lucida Console'>)</font> <b>{</b>
n <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>&gt;</font> len ? len : state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have;
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>buf, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next, n<font face='Lucida Console'>)</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>-</font><font color='#5555FF'>=</font> n;
<b>}</b>
<font color='#009900'>/* output buffer empty -- return if we're at the end of the input */</font>
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>eof <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_in <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>past <font color='#5555FF'>=</font> <font color='#979000'>1</font>; <font color='#009900'>/* tried to read past end */</font>
<font color='#0000FF'>break</font>;
<b>}</b>
<font color='#009900'>/* need output data -- for small len or new stream load up our output
buffer */</font>
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font><font color='#5555FF'>=</font> LOOK <font color='#5555FF'>|</font><font color='#5555FF'>|</font> len <font color='#5555FF'>&lt;</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#009900'>/* get more output, looking for header if required */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_fetch</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#0000FF'>continue</font>; <font color='#009900'>/* no progress yet -- go back to copy above */</font>
<font color='#009900'>/* the copy above assures that we will leave with space in the
output buffer, allowing at least one gzungetc() to succeed */</font>
<b>}</b>
<font color='#009900'>/* large len -- read directly into user buffer */</font>
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font><font color='#5555FF'>=</font> COPY<font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* read directly */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_load</font><font face='Lucida Console'>(</font>state, <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>buf, len, <font color='#5555FF'>&amp;</font>n<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#009900'>/* large len -- decompress directly into user buffer */</font>
<font color='#0000FF'>else</font> <b>{</b> <font color='#009900'>/* state-&gt;how == GZIP */</font>
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>avail_out <font color='#5555FF'>=</font> len;
strm<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>next_out <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>buf;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_decomp</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
n <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<b>}</b>
<font color='#009900'>/* update progress */</font>
len <font color='#5555FF'>-</font><font color='#5555FF'>=</font> n;
buf <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font>buf <font color='#5555FF'>+</font> n;
got <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.pos <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>len<font face='Lucida Console'>)</font>;
<font color='#009900'>/* return number of bytes read into user buffer (will fit in int) */</font>
<font color='#0000FF'>return</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font>got;
<b>}</b>
<font color='#009900'>/* -- see zlib.h -- */</font>
<font color='#0000FF'>#ifdef</font> Z_PREFIX_SET
# undef z_gzgetc
<font color='#0000FF'>#else</font>
# undef gzgetc
<font color='#0000FF'>#endif</font>
<font color='#0000FF'><u>int</u></font> ZEXPORT <b><a name='gzgetc'></a>gzgetc</b><font face='Lucida Console'>(</font>file<font face='Lucida Console'>)</font>
gzFile file;
<b>{</b>
<font color='#0000FF'><u>int</u></font> ret;
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> buf[<font color='#979000'>1</font>];
gz_statep state;
<font color='#009900'>/* get internal structure */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>file <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
state <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font>file;
<font color='#009900'>/* check that we're reading and that there's no (serious) error */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mode <font color='#5555FF'>!</font><font color='#5555FF'>=</font> GZ_READ <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
<font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_BUF_ERROR<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#009900'>/* try output buffer (no need to check for skip request) */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font face='Lucida Console'>)</font> <b>{</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font color='#5555FF'>-</font><font color='#5555FF'>-</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.pos<font color='#5555FF'>+</font><font color='#5555FF'>+</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>*</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next<font face='Lucida Console'>)</font><font color='#5555FF'>+</font><font color='#5555FF'>+</font>;
<b>}</b>
<font color='#009900'>/* nothing there -- try gzread() */</font>
ret <font color='#5555FF'>=</font> <font color='#BB00BB'>gzread</font><font face='Lucida Console'>(</font>file, buf, <font color='#979000'>1</font><font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> ret <font color='#5555FF'>&lt;</font> <font color='#979000'>1</font> ? <font color='#5555FF'>-</font><font color='#979000'>1</font> : buf[<font color='#979000'>0</font>];
<b>}</b>
<font color='#0000FF'><u>int</u></font> ZEXPORT <b><a name='gzgetc_'></a>gzgetc_</b><font face='Lucida Console'>(</font>file<font face='Lucida Console'>)</font>
gzFile file;
<b>{</b>
<font color='#0000FF'>return</font> <font color='#BB00BB'>gzgetc</font><font face='Lucida Console'>(</font>file<font face='Lucida Console'>)</font>;
<b>}</b>
<font color='#009900'>/* -- see zlib.h -- */</font>
<font color='#0000FF'><u>int</u></font> ZEXPORT <b><a name='gzungetc'></a>gzungetc</b><font face='Lucida Console'>(</font>c, file<font face='Lucida Console'>)</font>
<font color='#0000FF'><u>int</u></font> c;
gzFile file;
<b>{</b>
gz_statep state;
<font color='#009900'>/* get internal structure */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>file <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
state <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font>file;
<font color='#009900'>/* check that we're reading and that there's no (serious) error */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mode <font color='#5555FF'>!</font><font color='#5555FF'>=</font> GZ_READ <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
<font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_BUF_ERROR<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#009900'>/* process a skip request */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>seek<font face='Lucida Console'>)</font> <b>{</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>seek <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_skip</font><font face='Lucida Console'>(</font>state, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>skip<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#009900'>/* can't push EOF */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>c <font color='#5555FF'>&lt;</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<font color='#009900'>/* if output buffer empty, put byte at end (allows more pushing) */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font> <font color='#979000'>1</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out <font color='#5555FF'>+</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font> <font color='#5555FF'>-</font> <font color='#979000'>1</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next[<font color='#979000'>0</font>] <font color='#5555FF'>=</font> c;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.pos<font color='#5555FF'>-</font><font color='#5555FF'>-</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>past <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>return</font> c;
<b>}</b>
<font color='#009900'>/* if no room, give up (must have already done a gzungetc()) */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_DATA_ERROR, "<font color='#CC0000'>out of room to push characters</font>"<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> <font color='#5555FF'>-</font><font color='#979000'>1</font>;
<b>}</b>
<font color='#009900'>/* slide output data if needed and insert byte before existing data */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>=</font><font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out<font face='Lucida Console'>)</font> <b>{</b>
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>src <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out <font color='#5555FF'>+</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have;
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>dest <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out <font color='#5555FF'>+</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size <font color='#5555FF'>&lt;</font><font color='#5555FF'>&lt;</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>;
<font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>src <font color='#5555FF'>&gt;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out<font face='Lucida Console'>)</font>
<font color='#5555FF'>*</font><font color='#5555FF'>-</font><font color='#5555FF'>-</font>dest <font color='#5555FF'>=</font> <font color='#5555FF'>*</font><font color='#5555FF'>-</font><font color='#5555FF'>-</font>src;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>=</font> dest;
<b>}</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have<font color='#5555FF'>+</font><font color='#5555FF'>+</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next<font color='#5555FF'>-</font><font color='#5555FF'>-</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next[<font color='#979000'>0</font>] <font color='#5555FF'>=</font> c;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.pos<font color='#5555FF'>-</font><font color='#5555FF'>-</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>past <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>return</font> c;
<b>}</b>
<font color='#009900'>/* -- see zlib.h -- */</font>
<font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font> ZEXPORT <b><a name='gzgets'></a>gzgets</b><font face='Lucida Console'>(</font>file, buf, len<font face='Lucida Console'>)</font>
gzFile file;
<font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>buf;
<font color='#0000FF'><u>int</u></font> len;
<b>{</b>
<font color='#0000FF'><u>unsigned</u></font> left, n;
<font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>str;
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font>eol;
gz_statep state;
<font color='#009900'>/* check parameters and get internal structure */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>file <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> buf <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> len <font color='#5555FF'>&lt;</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> NULL;
state <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font>file;
<font color='#009900'>/* check that we're reading and that there's no (serious) error */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mode <font color='#5555FF'>!</font><font color='#5555FF'>=</font> GZ_READ <font color='#5555FF'>|</font><font color='#5555FF'>|</font>
<font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_BUF_ERROR<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> NULL;
<font color='#009900'>/* process a skip request */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>seek<font face='Lucida Console'>)</font> <b>{</b>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>seek <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>gz_skip</font><font face='Lucida Console'>(</font>state, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>skip<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> NULL;
<b>}</b>
<font color='#009900'>/* copy output bytes up to new line or len - 1, whichever comes first --
append a terminating zero to the string (we don't check for a zero in
the contents, let the user worry about that) */</font>
str <font color='#5555FF'>=</font> buf;
left <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font><font face='Lucida Console'>)</font>len <font color='#5555FF'>-</font> <font color='#979000'>1</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>left<font face='Lucida Console'>)</font> <font color='#0000FF'>do</font> <b>{</b>
<font color='#009900'>/* assure that something is in the output buffer */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> <font color='#BB00BB'>gz_fetch</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font> <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#5555FF'>-</font><font color='#979000'>1</font><font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> NULL; <font color='#009900'>/* error */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <b>{</b> <font color='#009900'>/* end of file */</font>
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>past <font color='#5555FF'>=</font> <font color='#979000'>1</font>; <font color='#009900'>/* read past end */</font>
<font color='#0000FF'>break</font>; <font color='#009900'>/* return what we have */</font>
<b>}</b>
<font color='#009900'>/* look for end-of-line in current output buffer */</font>
n <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>&gt;</font> left ? left : state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have;
eol <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> <font color='#5555FF'>*</font><font face='Lucida Console'>)</font><font color='#BB00BB'>memchr</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next, '<font color='#FF0000'>\n</font>', n<font face='Lucida Console'>)</font>;
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>eol <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
n <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font><font color='#0000FF'><u>unsigned</u></font><font face='Lucida Console'>)</font><font face='Lucida Console'>(</font>eol <font color='#5555FF'>-</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next<font face='Lucida Console'>)</font> <font color='#5555FF'>+</font> <font color='#979000'>1</font>;
<font color='#009900'>/* copy through end-of-line, or remainder if not found */</font>
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>buf, state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next, n<font face='Lucida Console'>)</font>;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>-</font><font color='#5555FF'>=</font> n;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.next <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.pos <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
left <font color='#5555FF'>-</font><font color='#5555FF'>=</font> n;
buf <font color='#5555FF'>+</font><font color='#5555FF'>=</font> n;
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>left <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> eol <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>;
<font color='#009900'>/* return terminated string, or if nothing, end of file */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>buf <font color='#5555FF'>=</font><font color='#5555FF'>=</font> str<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> NULL;
buf[<font color='#979000'>0</font>] <font color='#5555FF'>=</font> <font color='#979000'>0</font>;
<font color='#0000FF'>return</font> str;
<b>}</b>
<font color='#009900'>/* -- see zlib.h -- */</font>
<font color='#0000FF'><u>int</u></font> ZEXPORT <b><a name='gzdirect'></a>gzdirect</b><font face='Lucida Console'>(</font>file<font face='Lucida Console'>)</font>
gzFile file;
<b>{</b>
gz_statep state;
<font color='#009900'>/* get internal structure */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>file <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> <font color='#979000'>0</font>;
state <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font>file;
<font color='#009900'>/* if the state is not known, but we can find out, then do so (this is
mainly for right after a gzopen() or gzdopen()) */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mode <font color='#5555FF'>=</font><font color='#5555FF'>=</font> GZ_READ <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>how <font color='#5555FF'>=</font><font color='#5555FF'>=</font> LOOK <font color='#5555FF'>&amp;</font><font color='#5555FF'>&amp;</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>x.have <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>
<font face='Lucida Console'>(</font><font color='#0000FF'><u>void</u></font><font face='Lucida Console'>)</font><font color='#BB00BB'>gz_look</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font>;
<font color='#009900'>/* return 1 if transparent, 0 if processing a gzip stream */</font>
<font color='#0000FF'>return</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>direct;
<b>}</b>
<font color='#009900'>/* -- see zlib.h -- */</font>
<font color='#0000FF'><u>int</u></font> ZEXPORT <b><a name='gzclose_r'></a>gzclose_r</b><font face='Lucida Console'>(</font>file<font face='Lucida Console'>)</font>
gzFile file;
<b>{</b>
<font color='#0000FF'><u>int</u></font> ret, err;
gz_statep state;
<font color='#009900'>/* get internal structure */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>file <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> Z_STREAM_ERROR;
state <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>gz_statep<font face='Lucida Console'>)</font>file;
<font color='#009900'>/* check that we're reading */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>mode <font color='#5555FF'>!</font><font color='#5555FF'>=</font> GZ_READ<font face='Lucida Console'>)</font>
<font color='#0000FF'>return</font> Z_STREAM_ERROR;
<font color='#009900'>/* free memory and close file */</font>
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>size<font face='Lucida Console'>)</font> <b>{</b>
<font color='#BB00BB'>inflateEnd</font><font face='Lucida Console'>(</font><font color='#5555FF'>&amp;</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>strm<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font>;
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>out<font face='Lucida Console'>)</font>;
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>in<font face='Lucida Console'>)</font>;
<b>}</b>
err <font color='#5555FF'>=</font> state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>err <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_BUF_ERROR ? Z_BUF_ERROR : Z_OK;
<font color='#BB00BB'>gz_error</font><font face='Lucida Console'>(</font>state, Z_OK, NULL<font face='Lucida Console'>)</font>;
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>path<font face='Lucida Console'>)</font>;
ret <font color='#5555FF'>=</font> <font color='#BB00BB'>close</font><font face='Lucida Console'>(</font>state<font color='#5555FF'>-</font><font color='#5555FF'>&gt;</font>fd<font face='Lucida Console'>)</font>;
<font color='#BB00BB'>free</font><font face='Lucida Console'>(</font>state<font face='Lucida Console'>)</font>;
<font color='#0000FF'>return</font> ret ? Z_ERRNO : err;
<b>}</b>
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