305 lines
15 KiB
HTML
Executable file
305 lines
15 KiB
HTML
Executable file
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<title>SCC.150 Assembler Emulator: /home/rumperuu/Documents/University/University Work/SCC.150 Digital Systems/Coursework/unr-C/SCC.150 Assembler Emulator/source/mystring.c File Reference</title>
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<div id="projectname">SCC.150 Assembler Emulator
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<div id="projectbrief">A compiler for a simple assembler language</div>
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<a href="#func-members">Functions</a> </div>
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<div class="title">mystring.c File Reference</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="textblock"><code>#include <stddef.h></code><br/>
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<code>#include "<a class="el" href="mystring_8h_source.html">mystring.h</a>"</code><br/>
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</div><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:aa231246d7f6f97231aa18689cc2ea20a"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="mystring_8c.html#aa231246d7f6f97231aa18689cc2ea20a">mystrlen</a> (const char *s)</td></tr>
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<tr class="separator:aa231246d7f6f97231aa18689cc2ea20a"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a3dab99f21a63ee803be3e9344efda0a0"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="mystring_8c.html#a3dab99f21a63ee803be3e9344efda0a0">mystrcmp</a> (const char *s1, const char *s2)</td></tr>
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<tr class="separator:a3dab99f21a63ee803be3e9344efda0a0"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a70913f883a62585fb8fe025aa1e56749"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="mystring_8c.html#a70913f883a62585fb8fe025aa1e56749">mystrncmp</a> (const char *s1, const char *s2, int n)</td></tr>
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<tr class="separator:a70913f883a62585fb8fe025aa1e56749"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a1a18457ecefaaafb354de326065b86f9"><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="mystring_8c.html#a1a18457ecefaaafb354de326065b86f9">mystrchr</a> (char *haystack, const char needle)</td></tr>
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<tr class="separator:a1a18457ecefaaafb354de326065b86f9"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ac650f6f569951713296a17edd496f7a5"><td class="memItemLeft" align="right" valign="top">char * </td><td class="memItemRight" valign="bottom"><a class="el" href="mystring_8c.html#ac650f6f569951713296a17edd496f7a5">mystrstr</a> (char *haystack, const char *needle)</td></tr>
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<tr class="separator:ac650f6f569951713296a17edd496f7a5"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
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<div class="textblock"><dl class="section author"><dt>Author</dt><dd>Ben Goldsworthy (rumps) <a href="#" onclick="location.href='mai'+'lto:'+'bgo'+'ld'+'swo'+'rt'+'hy9'+'6@'+'gma'+'il'+'.co'+'m'; return false;">bgold<span style="display: none;">.nosp@m.</span>swor<span style="display: none;">.nosp@m.</span>thy96<span style="display: none;">.nosp@m.</span>@gma<span style="display: none;">.nosp@m.</span>il.co<span style="display: none;">.nosp@m.</span>m</a> </dd></dl>
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<dl class="section version"><dt>Version</dt><dd>1.0</dd></dl>
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<h1><a class="anchor" id="LICENSE"></a>
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LICENSE</h1>
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<p>This file is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.</p>
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<p>This file is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.</p>
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<p>You should have received a copy of the GNU General Public License along with this program. If not, see <a href="http://www.gnu.org/licenses/">http://www.gnu.org/licenses/</a>.</p>
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<h1><a class="anchor" id="DESCRIPTION"></a>
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DESCRIPTION</h1>
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<p>The <code><a class="el" href="mystring_8h.html">mystring.h</a></code> library serves as a fairly pointless replacement for the perfectly good (better, even) <code>string.h</code>. </p>
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</div><h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="a1a18457ecefaaafb354de326065b86f9"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">char* mystrchr </td>
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<td>(</td>
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<td class="paramtype">char * </td>
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<td class="paramname"><em>haystack</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const char </td>
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<td class="paramname"><em>needle</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>A function to find if a character exists in a string.</p>
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<p>Goes through the string <code>haystack</code> looking for the character <code>needle</code>.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">haystack</td><td>the string to search </td></tr>
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<tr><td class="paramname">needle</td><td>the character to search for </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd><code>haystack</code> if successful, 0 if not </dd></dl>
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</div>
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</div>
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<a class="anchor" id="a3dab99f21a63ee803be3e9344efda0a0"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">int mystrcmp </td>
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<td>(</td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>s1</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>s2</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>A function to compare two strings.</p>
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<p>Compares two strings, returning -1 if <code>s1</code> < <code>s2</code>, 1 if <code>s1</code> > <code>s2</code> and 0 if <code>s1</code> == <code>s2</code>.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">s1</td><td>the string to compare </td></tr>
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<tr><td class="paramname">s2</td><td>the string to compare <code>s1</code> to </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>-1 if the <code>s1</code> < <code>s2</code>; 1 if <code>s1</code> > <code>s2</code>; 0 if <code>s1</code> == <code>s2</code> </dd></dl>
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</div>
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</div>
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<a class="anchor" id="aa231246d7f6f97231aa18689cc2ea20a"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">size_t mystrlen </td>
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<td>(</td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>s</em></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>A function to measure the length of a valid C string.</p>
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<p>Goes through the null-terminated (i.e. valid C) string <code>s</code> character-by-character, returning the length of the string (sans the null terminator).</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">s</td><td>the string to measure </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>the length of the string as an <code>unsigned int</code> (<code>size_t</code> because apparently that's the done thing as of C99, which I'm using because I love for loop initial declarations to bits) </dd></dl>
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</div>
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</div>
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<a class="anchor" id="a70913f883a62585fb8fe025aa1e56749"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">int mystrncmp </td>
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<td>(</td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>s1</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>s2</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">int </td>
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<td class="paramname"><em>n</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>A function to compare two strings up to a certain point.</p>
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<p>Goes through <code>n</code> characters of <code>s1</code>, comparing them to the matching characters of <code>s2</code>. If the characters are different, it returns -1 if <code>s1</code> < <code>s2</code> and 1 if <code>s1</code> > <code>s2</code>.</p>
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<p>If they're the same, it returns 0 if <code>s1</code> is the same length as <code>s2</code> (i.e. the same characters are both <code>NUL</code>). If the function reaches the <code>n</code>th character of <code>s1</code> and it remains the same as <code>s2</code>, it returns 0 also.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">s1</td><td>the string to compare </td></tr>
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<tr><td class="paramname">s2</td><td>the string to compare <code>s1</code> to </td></tr>
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<tr><td class="paramname">n</td><td>the length of <code>s1</code> to compare </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>-1/1 if the strings don't match, 0 if they do </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ac650f6f569951713296a17edd496f7a5"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<tr>
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<td class="memname">char* mystrstr </td>
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<td>(</td>
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<td class="paramtype">char * </td>
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<td class="paramname"><em>haystack</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">const char * </td>
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<td class="paramname"><em>needle</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>A function to find if a string exists as a subset or totality of another.</p>
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<p>Goes through the string <code>haystack</code> looking for the string <code>needle</code> by executing <code>mystrchr</code> on each character in turn.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">haystack</td><td>the string to search </td></tr>
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<tr><td class="paramname">needle</td><td>the (sub)string to search for </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd><code>haystack</code> if successful, 0 if not </dd></dl>
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</div>
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</div>
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</div><!-- contents -->
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