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&#160;<span id="projectnumber">4.5.0</span>
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<div id="projectbrief">API Documentation for GBDK 2020</div>
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<a href="#define-members">Macros</a> &#124;
<a href="#func-members">Functions</a> </div>
<div class="headertitle"><div class="title">string.h File Reference</div></div>
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<div class="contents">
<div class="textblock"><code>#include &lt;<a class="el" href="asm_2mos6502_2types_8h_source.html">types.h</a>&gt;</code><br />
</div>
<p><a href="asm_2mos6502_2string_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:memcpy"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#memcpy">memcpy</a>(dst, src, n)&#160;&#160;&#160;<a class="el" href="asm_2mos6502_2string_8h.html#__memcpy">__memcpy</a>(dst, src, n)</td></tr>
<tr class="separator:memcpy"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:strcpy"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strcpy">strcpy</a> (char *dest, const char *src) <a class="el" href="asm_2types_8h.html#OLDCALL">OLDCALL</a></td></tr>
<tr class="separator:strcpy"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:strcmp"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strcmp">strcmp</a> (const char *s1, const char *s2)</td></tr>
<tr class="separator:strcmp"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:__memcpy"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#__memcpy">__memcpy</a> (void *dest, const void *src, <a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a> len)</td></tr>
<tr class="separator:__memcpy"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:memmove"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#memmove">memmove</a> (void *dest, const void *src, <a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a> n) <a class="el" href="asm_2types_8h.html#OLDCALL">OLDCALL</a></td></tr>
<tr class="separator:memmove"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:memset"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#memset">memset</a> (void *s, int <a class="el" href="sms_8h.html#c">c</a>, <a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a> n)</td></tr>
<tr class="separator:memset"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:reverse"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#reverse">reverse</a> (char *s) <a class="el" href="asm_2types_8h.html#NONBANKED">NONBANKED</a></td></tr>
<tr class="separator:reverse"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:strcat"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strcat">strcat</a> (char *s1, const char *s2) <a class="el" href="asm_2types_8h.html#NONBANKED">NONBANKED</a></td></tr>
<tr class="separator:strcat"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:strlen"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strlen">strlen</a> (const char *s) <a class="el" href="asm_2types_8h.html#OLDCALL">OLDCALL</a></td></tr>
<tr class="separator:strlen"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:strncat"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strncat">strncat</a> (char *s1, const char *s2, int n) <a class="el" href="asm_2types_8h.html#NONBANKED">NONBANKED</a></td></tr>
<tr class="separator:strncat"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:strncmp"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strncmp">strncmp</a> (const char *s1, const char *s2, int n) <a class="el" href="asm_2types_8h.html#NONBANKED">NONBANKED</a></td></tr>
<tr class="separator:strncmp"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:strncpy"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#strncpy">strncpy</a> (char *s1, const char *s2, int n) <a class="el" href="asm_2types_8h.html#NONBANKED">NONBANKED</a></td></tr>
<tr class="separator:strncpy"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:memcmp"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2mos6502_2string_8h.html#memcmp">memcmp</a> (const void *buf1, const void *buf2, <a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a> count)</td></tr>
<tr class="separator:memcmp"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p >Generic string functions. </p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="memcpy" name="memcpy"></a>
<h2 class="memtitle"><span class="permalink"><a href="#memcpy">&#9670;&nbsp;</a></span>memcpy</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define memcpy</td>
<td>(</td>
<td class="paramtype">&#160;</td>
<td class="paramname">dst, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">src, </td>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">&#160;</td>
<td class="paramname">n&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td>&#160;&#160;&#160;<a class="el" href="asm_2mos6502_2string_8h.html#__memcpy">__memcpy</a>(dst, src, n)</td>
</tr>
</table>
</div><div class="memdoc">
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="strcpy" name="strcpy"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strcpy">&#9670;&nbsp;</a></span>strcpy()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">char * strcpy </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>dest</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>src</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<p >Copies the string pointed to by <b>src</b> (including the terminating &lsquo;\0&rsquo; character) to the array pointed to by <b>dest</b>.</p>
<p >The strings may not overlap, and the destination string dest must be large enough to receive the copy.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">dest</td><td>Array to copy into </td></tr>
<tr><td class="paramname">src</td><td>Array to copy from</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>A pointer to dest </dd></dl>
</div>
</div>
<a id="strcmp" name="strcmp"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strcmp">&#9670;&nbsp;</a></span>strcmp()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int strcmp </td>
<td>(</td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Compares strings</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s1</td><td>First string to compare </td></tr>
<tr><td class="paramname">s2</td><td>Second string to compare</td></tr>
</table>
</dd>
</dl>
<p>Returns: </p><ul>
<li>&gt; 0 if <b>s1</b> &gt; <b>s2</b> </li>
<li>0 if <b>s1</b> == <b>s2</b> </li>
<li>&lt; 0 if <b>s1</b> &lt; <b>s2</b> </li>
</ul>
</div>
</div>
<a id="__memcpy" name="__memcpy"></a>
<h2 class="memtitle"><span class="permalink"><a href="#__memcpy">&#9670;&nbsp;</a></span>__memcpy()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void * __memcpy </td>
<td>(</td>
<td class="paramtype">void *&#160;</td>
<td class="paramname"><em>dest</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const void *&#160;</td>
<td class="paramname"><em>src</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a>&#160;</td>
<td class="paramname"><em>len</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Copies n bytes from memory area src to memory area dest.</p>
<p >The memory areas may not overlap.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">dest</td><td>Buffer to copy into </td></tr>
<tr><td class="paramname">src</td><td>Buffer to copy from </td></tr>
<tr><td class="paramname">len</td><td>Number of Bytes to copy </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="memmove" name="memmove"></a>
<h2 class="memtitle"><span class="permalink"><a href="#memmove">&#9670;&nbsp;</a></span>memmove()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void * memmove </td>
<td>(</td>
<td class="paramtype">void *&#160;</td>
<td class="paramname"><em>dest</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const void *&#160;</td>
<td class="paramname"><em>src</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a>&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Copies n bytes from memory area src to memory area dest, areas may overlap </p>
</div>
</div>
<a id="memset" name="memset"></a>
<h2 class="memtitle"><span class="permalink"><a href="#memset">&#9670;&nbsp;</a></span>memset()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void * memset </td>
<td>(</td>
<td class="paramtype">void *&#160;</td>
<td class="paramname"><em>s</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>c</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a>&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Fills the memory region <b>s</b> with <b>n</b> bytes using value <b>c</b></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s</td><td>Buffer to fill </td></tr>
<tr><td class="paramname">c</td><td>char value to fill with (truncated from int) </td></tr>
<tr><td class="paramname">n</td><td>Number of bytes to fill </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="reverse" name="reverse"></a>
<h2 class="memtitle"><span class="permalink"><a href="#reverse">&#9670;&nbsp;</a></span>reverse()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">char * reverse </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>s</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Reverses the characters in a string</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s</td><td>Pointer to string to reverse.</td></tr>
</table>
</dd>
</dl>
<p>For example 'abcdefg' will become 'gfedcba'.</p>
<p >Banked as the string must be modifiable.</p>
<p >Returns: Pointer to <b>s</b> </p>
</div>
</div>
<a id="strcat" name="strcat"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strcat">&#9670;&nbsp;</a></span>strcat()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">char * strcat </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>s1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Concatenate Strings. Appends string <b>s2</b> to the end of string <b>s1</b></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s1</td><td>String to append onto </td></tr>
<tr><td class="paramname">s2</td><td>String to copy from</td></tr>
</table>
</dd>
</dl>
<p>For example 'abc' and 'def' will become 'abcdef'.</p>
<p >String <b>s1</b> must be large enough to store both <b>s1</b> and <b>s2</b>.</p>
<p >Returns: Pointer to <b>s1</b> </p>
</div>
</div>
<a id="strlen" name="strlen"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strlen">&#9670;&nbsp;</a></span>strlen()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int strlen </td>
<td>(</td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p >Calculates the length of a string</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s</td><td>String to calculate length of</td></tr>
</table>
</dd>
</dl>
<p>Returns: Length of string not including the terminating &lsquo;\0&rsquo; character. </p>
</div>
</div>
<a id="strncat" name="strncat"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strncat">&#9670;&nbsp;</a></span>strncat()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">char * strncat </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>s1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
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<td>)</td>
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<p >Concatenate at most <b>n</b> characters from string <b>s2</b> onto the end of <b>s1</b>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s1</td><td>String to append onto </td></tr>
<tr><td class="paramname">s2</td><td>String to copy from </td></tr>
<tr><td class="paramname">n</td><td>Max number of characters to copy from <b>s2</b></td></tr>
</table>
</dd>
</dl>
<p>String <b>s1</b> must be large enough to store both <b>s1</b> and <b>n</b> characters of <b>s2</b></p>
<p >Returns: Pointer to <b>s1</b> </p>
</div>
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<a id="strncmp" name="strncmp"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strncmp">&#9670;&nbsp;</a></span>strncmp()</h2>
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<td class="memname">int strncmp </td>
<td>(</td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<p >Compare strings (at most n characters):</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s1</td><td>First string to compare </td></tr>
<tr><td class="paramname">s2</td><td>Second string to compare </td></tr>
<tr><td class="paramname">n</td><td>Max number of characters to compare</td></tr>
</table>
</dd>
</dl>
<p>Returns: </p><ul>
<li>&gt; 0 if <b>s1</b> &gt; <b>s2</b> </li>
<li>0 if <b>s1</b> == <b>s2</b> </li>
<li>&lt; 0 if <b>s1</b> &lt; <b>s2</b> </li>
</ul>
</div>
</div>
<a id="strncpy" name="strncpy"></a>
<h2 class="memtitle"><span class="permalink"><a href="#strncpy">&#9670;&nbsp;</a></span>strncpy()</h2>
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<div class="memproto">
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<td class="memname">char * strncpy </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>s1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
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<p >Copy <b>n</b> characters from string <b>s2</b> to <b>s1</b></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">s1</td><td>String to copy into </td></tr>
<tr><td class="paramname">s2</td><td>String to copy from </td></tr>
<tr><td class="paramname">n</td><td>Max number of characters to copy from <b>s2</b></td></tr>
</table>
</dd>
</dl>
<p>If <b>s2</b> is shorter than <b>n</b>, the remaining bytes in <b>s1</b> are filled with \0.</p>
<p >Warning: If there is no \0 in the first <b>n</b> bytes of <b>s2</b> then <b>s1</b> will not be null terminated.</p>
<p >Returns: Pointer to <b>s1</b> </p>
</div>
</div>
<a id="memcmp" name="memcmp"></a>
<h2 class="memtitle"><span class="permalink"><a href="#memcmp">&#9670;&nbsp;</a></span>memcmp()</h2>
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<td class="memname">int memcmp </td>
<td>(</td>
<td class="paramtype">const void *&#160;</td>
<td class="paramname"><em>buf1</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const void *&#160;</td>
<td class="paramname"><em>buf2</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#size_t">size_t</a>&#160;</td>
<td class="paramname"><em>count</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<p >Compares buffers</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">buf1</td><td>First buffer to compare </td></tr>
<tr><td class="paramname">buf2</td><td>Second buffer to compare </td></tr>
<tr><td class="paramname">count</td><td>Buffer length</td></tr>
</table>
</dd>
</dl>
<p>Returns: </p><ul>
<li>&gt; 0 if <b>buf1</b> &gt; <b>buf2</b> </li>
<li>0 if <b>buf1</b> == <b>buf2</b> </li>
<li>&lt; 0 if <b>buf1</b> &lt; <b>buf2</b> </li>
</ul>
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