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<a href="#define-members">Defines</a> |
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<div class="title">/builddir/build/BUILD/nifticlib-2.0.0/znzlib/znzlib.c File Reference</div> </div>
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<p>Low level i/o interface to compressed and noncompressed files. Written by Mark Jenkinson, FMRIB.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include "znzlib.h"</code><br/>
</div><table class="memberdecls">
<tr><td colspan="2"><h2><a name="define-members"></a>
Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a704d5acdeafe9b3ba8bfe00a00bc5ce5"></a><!-- doxytag: member="znzlib.c::ZNZ_MAX_BLOCK_SIZE" ref="a704d5acdeafe9b3ba8bfe00a00bc5ce5" args="" -->
#define </td><td class="memItemRight" valign="bottom"><b>ZNZ_MAX_BLOCK_SIZE</b>   (1<<30)</td></tr>
<tr><td colspan="2"><h2><a name="func-members"></a>
Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aa540bce560a7e7cb664834919aaa22c3"></a><!-- doxytag: member="znzlib.c::znzopen" ref="aa540bce560a7e7cb664834919aaa22c3" args="(const char *path, const char *mode, int use_compression)" -->
<a class="el" href="structznzptr.html">znzFile</a> </td><td class="memItemRight" valign="bottom"><b>znzopen</b> (const char *path, const char *mode, int use_compression)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a1787892db58f5a7cd52e277afaaeb047"></a><!-- doxytag: member="znzlib.c::znzdopen" ref="a1787892db58f5a7cd52e277afaaeb047" args="(int fd, const char *mode, int use_compression)" -->
<a class="el" href="structznzptr.html">znzFile</a> </td><td class="memItemRight" valign="bottom"><b>znzdopen</b> (int fd, const char *mode, int use_compression)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a52af94f6a3c8f0b049f0da23a73298b2"></a><!-- doxytag: member="znzlib.c::Xznzclose" ref="a52af94f6a3c8f0b049f0da23a73298b2" args="(znzFile *file)" -->
int </td><td class="memItemRight" valign="bottom"><b>Xznzclose</b> (<a class="el" href="structznzptr.html">znzFile</a> *file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aeb8e9e6f545a5feaa67d680acdc55d36"></a><!-- doxytag: member="znzlib.c::znzread" ref="aeb8e9e6f545a5feaa67d680acdc55d36" args="(void *buf, size_t size, size_t nmemb, znzFile file)" -->
size_t </td><td class="memItemRight" valign="bottom"><b>znzread</b> (void *buf, size_t size, size_t nmemb, <a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3a983f55a92768766161deb0235e0cd4"></a><!-- doxytag: member="znzlib.c::znzwrite" ref="a3a983f55a92768766161deb0235e0cd4" args="(const void *buf, size_t size, size_t nmemb, znzFile file)" -->
size_t </td><td class="memItemRight" valign="bottom"><b>znzwrite</b> (const void *buf, size_t size, size_t nmemb, <a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8e720f1e20e4a4849061ebf3a55d3d00"></a><!-- doxytag: member="znzlib.c::znzseek" ref="a8e720f1e20e4a4849061ebf3a55d3d00" args="(znzFile file, long offset, int whence)" -->
long </td><td class="memItemRight" valign="bottom"><b>znzseek</b> (<a class="el" href="structznzptr.html">znzFile</a> file, long offset, int whence)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8100abd69a0c08858120a86c38dfbe6d"></a><!-- doxytag: member="znzlib.c::znzrewind" ref="a8100abd69a0c08858120a86c38dfbe6d" args="(znzFile stream)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzrewind</b> (<a class="el" href="structznzptr.html">znzFile</a> stream)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ada3e90dbd58daddf0d99676129371557"></a><!-- doxytag: member="znzlib.c::znztell" ref="ada3e90dbd58daddf0d99676129371557" args="(znzFile file)" -->
long </td><td class="memItemRight" valign="bottom"><b>znztell</b> (<a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a069bf95b347e0216af18a63c388e30ea"></a><!-- doxytag: member="znzlib.c::znzputs" ref="a069bf95b347e0216af18a63c388e30ea" args="(const char *str, znzFile file)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzputs</b> (const char *str, <a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9c374a2fd16c2e73387c8fb6743fcc40"></a><!-- doxytag: member="znzlib.c::znzgets" ref="a9c374a2fd16c2e73387c8fb6743fcc40" args="(char *str, int size, znzFile file)" -->
char * </td><td class="memItemRight" valign="bottom"><b>znzgets</b> (char *str, int size, <a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a3b5cf510220b990f0b5512639fc879b3"></a><!-- doxytag: member="znzlib.c::znzflush" ref="a3b5cf510220b990f0b5512639fc879b3" args="(znzFile file)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzflush</b> (<a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="abc453a2495be2545ba3b3840ac41a5db"></a><!-- doxytag: member="znzlib.c::znzeof" ref="abc453a2495be2545ba3b3840ac41a5db" args="(znzFile file)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzeof</b> (<a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a276a5a5f0319843fa920d2ba976841d6"></a><!-- doxytag: member="znzlib.c::znzputc" ref="a276a5a5f0319843fa920d2ba976841d6" args="(int c, znzFile file)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzputc</b> (int c, <a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aec24a675883cee3f89f3bd82f7758821"></a><!-- doxytag: member="znzlib.c::znzgetc" ref="aec24a675883cee3f89f3bd82f7758821" args="(znzFile file)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzgetc</b> (<a class="el" href="structznzptr.html">znzFile</a> file)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af134c5a66b4d3370ff4c7e507834eea3"></a><!-- doxytag: member="znzlib.c::znzprintf" ref="af134c5a66b4d3370ff4c7e507834eea3" args="(znzFile stream, const char *format,...)" -->
int </td><td class="memItemRight" valign="bottom"><b>znzprintf</b> (<a class="el" href="structznzptr.html">znzFile</a> stream, const char *format,...)</td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Low level i/o interface to compressed and noncompressed files. Written by Mark Jenkinson, FMRIB. </p>
<p>This library provides an interface to both compressed (gzip/zlib) and uncompressed (normal) file IO. The functions are written to have the same interface as the standard file IO functions.</p>
<p>To use this library instead of normal file IO, the following changes are required:</p>
<ul>
<li>replace all instances of FILE* with znzFile</li>
<li>change the name of all function calls, replacing the initial character f with the znz (e.g. fseek becomes znzseek) one exception is rewind() -> znzrewind()</li>
<li>add a third parameter to all calls to znzopen (previously fopen) that specifies whether to use compression (1) or not (0)</li>
<li>use znz_isnull rather than any (pointer == NULL) comparisons in the code for znzfile types (normally done after a return from znzopen)</li>
</ul>
<p>NB: seeks for writable files with compression are quite restricted </p>
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