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&#160;<span id="projectnumber">4.3.0</span>
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<div id="projectbrief">API Documentation for GBDK 2020</div>
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<a href="#func-members">Functions</a> &#124;
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<div class="title">string.h File Reference</div> </div>
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<div class="textblock"><code>#include &lt;<a class="el" href="asm_2sm83_2types_8h_source.html">types.h</a>&gt;</code><br />
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<p><a href="asm_2sm83_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 name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ada128b5ed545214bb397d1399615ec9e"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#ada128b5ed545214bb397d1399615ec9e">strcpy</a> (char *dest, const char *src) <a class="el" href="asm_2types_8h.html#a0971918860055db2e50dacea4da8f3bc">OLDCALL</a> <a class="el" href="asm_2types_8h.html#acb825e83a33fcc06482c59b4ab2cf961">PRESERVES_REGS</a>(<a class="el" href="sms_8h.html#a4c2e4adef74067fdbb49005bc73de937">b</a></td></tr>
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<tr class="memitem:ab68eb7b07f8ada1c6c8bde74731d3de7"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#ab68eb7b07f8ada1c6c8bde74731d3de7">memcpy</a> (void *dest, const void *src, <a class="el" href="asm_2mos6502_2types_8h.html#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a> len)</td></tr>
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<tr class="memitem:a802c986820d3866639922b6bc9484f90"><td class="memItemLeft" align="right" valign="top">void *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#a802c986820d3866639922b6bc9484f90">memmove</a> (void *dest, const void *src, <a class="el" href="asm_2mos6502_2types_8h.html#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a> n)</td></tr>
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<tr class="memitem:a8908188ae9fc2f05d993257ef001d553"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#a8908188ae9fc2f05d993257ef001d553">strcat</a> (char *s1, const char *s2)</td></tr>
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<tr class="memitem:a5e4982e9d2fd4ec328abfda6b1a3f7e5"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#a5e4982e9d2fd4ec328abfda6b1a3f7e5">strlen</a> (const char *s) <a class="el" href="asm_2types_8h.html#a0971918860055db2e50dacea4da8f3bc">OLDCALL</a> <a class="el" href="asm_2types_8h.html#acb825e83a33fcc06482c59b4ab2cf961">PRESERVES_REGS</a>(<a class="el" href="sms_8h.html#a4c2e4adef74067fdbb49005bc73de937">b</a></td></tr>
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<tr class="memitem:a52701f453c97403ec1b12d286484259b"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#a52701f453c97403ec1b12d286484259b">memcmp</a> (const void *buf1, const void *buf2, <a class="el" href="asm_2mos6502_2types_8h.html#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a> count) <a class="el" href="asm_2types_8h.html#a0971918860055db2e50dacea4da8f3bc">OLDCALL</a></td></tr>
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Variables</h2></td></tr>
<tr class="memitem:a0b3366755f3276b0243c1e0497471b7a"><td class="memItemLeft" align="right" valign="top">char&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="asm_2sm83_2string_8h.html#a0b3366755f3276b0243c1e0497471b7a">c</a></td></tr>
<tr class="separator:a0b3366755f3276b0243c1e0497471b7a"><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">Function Documentation</h2>
<a id="ada128b5ed545214bb397d1399615ec9e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ada128b5ed545214bb397d1399615ec9e">&#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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</div><div class="memdoc">
<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>
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</div>
<a id="a7172770a053aa1fe0ab46a97ab43a5fa"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7172770a053aa1fe0ab46a97ab43a5fa">&#9670;&nbsp;</a></span>strcmp()</h2>
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<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="ab68eb7b07f8ada1c6c8bde74731d3de7"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ab68eb7b07f8ada1c6c8bde74731d3de7">&#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>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a>&#160;</td>
<td class="paramname"><em>len</em>&#160;</td>
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<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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<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>
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</dd>
</dl>
</div>
</div>
<a id="a802c986820d3866639922b6bc9484f90"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a802c986820d3866639922b6bc9484f90">&#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>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a>&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
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<p>Copies n bytes from memory area src to memory area dest, areas may overlap </p>
</div>
</div>
<a id="a4bc4146b1a053fc4ec10f1377bb21a4f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a4bc4146b1a053fc4ec10f1377bb21a4f">&#9670;&nbsp;</a></span>memset()</h2>
<div class="memitem">
<div class="memproto">
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<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>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="asm_2mos6502_2types_8h.html#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a>&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
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<tr>
<td></td>
<td>)</td>
<td></td><td></td>
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</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="a476b2b37367c65c6cb36037bfc16b19f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a476b2b37367c65c6cb36037bfc16b19f">&#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>
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<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="a8908188ae9fc2f05d993257ef001d553"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8908188ae9fc2f05d993257ef001d553">&#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>
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<p>Concatenate Strings. Appends string <b>s2</b> to the end of string <b>s1</b></p>
<dl class="params"><dt>Parameters</dt><dd>
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<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>
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</dd>
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<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>
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<h2 class="memtitle"><span class="permalink"><a href="#a5e4982e9d2fd4ec328abfda6b1a3f7e5">&#9670;&nbsp;</a></span>strlen()</h2>
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<td class="memname">int strlen </td>
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<td class="paramtype">const char *&#160;</td>
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<p>Calculates the length of a string</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">s</td><td>String to calculate length of</td></tr>
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</dd>
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<p>Returns: Length of string not including the terminating &lsquo;\0&rsquo; character. </p>
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<h2 class="memtitle"><span class="permalink"><a href="#af70714f788819be9dbf368a969be23f7">&#9670;&nbsp;</a></span>strncat()</h2>
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<td class="memname">char* strncat </td>
<td>(</td>
<td class="paramtype">char *&#160;</td>
<td class="paramname"><em>s1</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>, </td>
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<td class="paramtype">int&#160;</td>
<td class="paramname"><em>n</em>&#160;</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>
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</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>
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<h2 class="memtitle"><span class="permalink"><a href="#ab745ed93c0024648f33dc1d553e9fdcc">&#9670;&nbsp;</a></span>strncmp()</h2>
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<td class="memname">int strncmp </td>
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<td class="paramtype">const char *&#160;</td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>, </td>
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<td class="paramkey"></td>
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<td class="paramtype">int&#160;</td>
<td class="paramname"><em>n</em>&#160;</td>
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<p>Compare strings (at most <b>n</b> 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>
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<p>Returns zero if the strings are identical, or non-zero if they are not (see below).</p>
<p>Returns: </p><ul>
<li>&gt; 0 if <b>s1</b> &gt; <b>s2</b> (at first non-matching byte) </li>
<li>0 if <b>s1</b> == <b>s2</b> </li>
<li>&lt; 0 if <b>s1</b> &lt; <b>s2</b> (at first non-matching byte) </li>
</ul>
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<h2 class="memtitle"><span class="permalink"><a href="#a21ae87d60fcc456369668093c57db61f">&#9670;&nbsp;</a></span>strncpy()</h2>
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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>
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<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char *&#160;</td>
<td class="paramname"><em>s2</em>, </td>
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<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>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>
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<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>
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<h2 class="memtitle"><span class="permalink"><a href="#a52701f453c97403ec1b12d286484259b">&#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#a7c94ea6f8948649f8d181ae55911eeaf">size_t</a>&#160;</td>
<td class="paramname"><em>count</em>&#160;</td>
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<p>Compare up to <b>count</b> bytes in buffers <b>buf1</b> and <b>buf2</b></p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">buf1</td><td>Pointer to First buffer to compare </td></tr>
<tr><td class="paramname">buf2</td><td>Pointer to Second buffer to compare </td></tr>
<tr><td class="paramname">count</td><td>Max number of bytes to compare</td></tr>
</table>
</dd>
</dl>
<p>Returns zero if the buffers are identical, or non-zero if they are not (see below).</p>
<p>Returns: </p><ul>
<li>&gt; 0 if <b>buf1</b> &gt; <b>buf2</b> (at first non-matching byte) </li>
<li>0 if <b>buf1</b> == <b>buf2</b> </li>
<li>&lt; 0 if <b>buf1</b> &lt; <b>buf2</b> (at first non-matching byte) </li>
</ul>
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<h2 class="groupheader">Variable Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a0b3366755f3276b0243c1e0497471b7a">&#9670;&nbsp;</a></span>c</h2>
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<td class="memname">void c</td>
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