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<h1>include/sphinxbase/huff_code.h File Reference</h1>  </div>
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<p>Huffman code and bitstream implementation.  
<a href="#_details">More...</a></p>
<div class="textblock"><code>#include &lt;stdio.h&gt;</code><br/>
<code>#include &lt;sphinxbase/sphinxbase_export.h&gt;</code><br/>
<code>#include &lt;sphinxbase/prim_type.h&gt;</code><br/>
<code>#include &lt;sphinxbase/cmd_ln.h&gt;</code><br/>
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<p><a href="huff__code_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a99a5188e6a18682c96100cd5232af0f4"></a><!-- doxytag: member="huff_code.h::huff_code_t" ref="a99a5188e6a18682c96100cd5232af0f4" args="" -->
typedef struct <a class="el" href="structhuff__code__s.html">huff_code_s</a>&#160;</td><td class="memItemRight" valign="bottom"><b>huff_code_t</b></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="a278b925caf4f2c93cbb63adc8f77bfa6"></a><!-- doxytag: member="huff_code.h::huff_code_build_int" ref="a278b925caf4f2c93cbb63adc8f77bfa6" args="(int32 const *values, int32 const *frequencies, int nvals)" -->
SPHINXBASE_EXPORT <a class="el" href="structhuff__code__s.html">huff_code_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a278b925caf4f2c93cbb63adc8f77bfa6">huff_code_build_int</a> (int32 const *values, int32 const *frequencies, int nvals)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Create a codebook from 32-bit integer data. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af5d0c85a2ad206c277ecde2a085af790"></a><!-- doxytag: member="huff_code.h::huff_code_build_str" ref="af5d0c85a2ad206c277ecde2a085af790" args="(char *const *values, int32 const *frequencies, int nvals)" -->
SPHINXBASE_EXPORT <a class="el" href="structhuff__code__s.html">huff_code_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#af5d0c85a2ad206c277ecde2a085af790">huff_code_build_str</a> (char *const *values, int32 const *frequencies, int nvals)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Create a codebook from string data. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a873745b79dac884cbb1b5bdf12e069e6"></a><!-- doxytag: member="huff_code.h::huff_code_read" ref="a873745b79dac884cbb1b5bdf12e069e6" args="(FILE *infh)" -->
SPHINXBASE_EXPORT <a class="el" href="structhuff__code__s.html">huff_code_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a873745b79dac884cbb1b5bdf12e069e6">huff_code_read</a> (FILE *infh)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Read a codebook from a file. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6b91641e852a8eb4c4d32f40ff6dd055"></a><!-- doxytag: member="huff_code.h::huff_code_write" ref="a6b91641e852a8eb4c4d32f40ff6dd055" args="(huff_code_t *hc, FILE *outfh)" -->
SPHINXBASE_EXPORT int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a6b91641e852a8eb4c4d32f40ff6dd055">huff_code_write</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, FILE *outfh)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Write a codebook to a file. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a821658831cbe9b1199c756435d0ad4aa"></a><!-- doxytag: member="huff_code.h::huff_code_dump" ref="a821658831cbe9b1199c756435d0ad4aa" args="(huff_code_t *hc, FILE *dumpfh)" -->
SPHINXBASE_EXPORT int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a821658831cbe9b1199c756435d0ad4aa">huff_code_dump</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, FILE *dumpfh)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Print a codebook to a file as text (for debugging) <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a26a70d1b1704f1af985e67127e622a7b"></a><!-- doxytag: member="huff_code.h::huff_code_retain" ref="a26a70d1b1704f1af985e67127e622a7b" args="(huff_code_t *hc)" -->
SPHINXBASE_EXPORT <a class="el" href="structhuff__code__s.html">huff_code_t</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a26a70d1b1704f1af985e67127e622a7b">huff_code_retain</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Retain a pointer to a Huffman codec object. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ac8678d07a65af1963cc0b3bd8b10d646"></a><!-- doxytag: member="huff_code.h::huff_code_free" ref="ac8678d07a65af1963cc0b3bd8b10d646" args="(huff_code_t *hc)" -->
SPHINXBASE_EXPORT int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#ac8678d07a65af1963cc0b3bd8b10d646">huff_code_free</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Release a pointer to a Huffman codec object. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9698821197737e3e1be9533a3059c82c"></a><!-- doxytag: member="huff_code.h::huff_code_attach" ref="a9698821197737e3e1be9533a3059c82c" args="(huff_code_t *hc, FILE *fh, char const *mode)" -->
SPHINXBASE_EXPORT FILE *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a9698821197737e3e1be9533a3059c82c">huff_code_attach</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, FILE *fh, char const *mode)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Attach a Huffman codec to a file handle for input/output. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a403f575701c1d5fd2ddef1d001cf53e3"></a><!-- doxytag: member="huff_code.h::huff_code_detach" ref="a403f575701c1d5fd2ddef1d001cf53e3" args="(huff_code_t *hc)" -->
SPHINXBASE_EXPORT FILE *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a403f575701c1d5fd2ddef1d001cf53e3">huff_code_detach</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Detach a Huffman codec from its file handle. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="acf369555b8784eee944f7ebc97b6b825"></a><!-- doxytag: member="huff_code.h::huff_code_encode_int" ref="acf369555b8784eee944f7ebc97b6b825" args="(huff_code_t *hc, int32 sym, uint32 *outcw)" -->
SPHINXBASE_EXPORT int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#acf369555b8784eee944f7ebc97b6b825">huff_code_encode_int</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, int32 sym, uint32 *outcw)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Encode an integer, writing it to the file handle, if any. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a24fe76f501a7a0485f3e9485c60fae32"></a><!-- doxytag: member="huff_code.h::huff_code_encode_str" ref="a24fe76f501a7a0485f3e9485c60fae32" args="(huff_code_t *hc, char const *sym, uint32 *outcw)" -->
SPHINXBASE_EXPORT int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a24fe76f501a7a0485f3e9485c60fae32">huff_code_encode_str</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, char const *sym, uint32 *outcw)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Encode a string, writing it to the file handle, if any. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a9155dd07a0a24393ef0e4e66cb314140"></a><!-- doxytag: member="huff_code.h::huff_code_decode_int" ref="a9155dd07a0a24393ef0e4e66cb314140" args="(huff_code_t *hc, int *outval, char const **inout_data, size_t *inout_data_len, int *inout_offset)" -->
SPHINXBASE_EXPORT int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#a9155dd07a0a24393ef0e4e66cb314140">huff_code_decode_int</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, int *outval, char const **inout_data, size_t *inout_data_len, int *inout_offset)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Decode an integer, reading it from the file if no data given. <br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aec0908ece3a695f8a3f6619d8d726e57"></a><!-- doxytag: member="huff_code.h::huff_code_decode_str" ref="aec0908ece3a695f8a3f6619d8d726e57" args="(huff_code_t *hc, char const **inout_data, size_t *inout_data_len, int *inout_offset)" -->
SPHINXBASE_EXPORT char const *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="huff__code_8h.html#aec0908ece3a695f8a3f6619d8d726e57">huff_code_decode_str</a> (<a class="el" href="structhuff__code__s.html">huff_code_t</a> *hc, char const **inout_data, size_t *inout_data_len, int *inout_offset)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Decode a string, reading it from the file if no data given. <br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Huffman code and bitstream implementation. </p>
<p>This interface supports building canonical Huffman codes from string and integer values. It also provides support for encoding and decoding from strings and files, and for reading and writing codebooks from files. </p>

<p>Definition in file <a class="el" href="huff__code_8h_source.html">huff_code.h</a>.</p>
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