91 lines
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91 lines
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<ul><li><a href="../inweb/index.html">inweb</a></li>
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<!--Weave of 'Wide Strings' generated by Inweb-->
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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="index.html">foundation</a></li><li><a href="index.html#4">Chapter 4: Text Handling</a></li><li><b>Wide Strings</b></li></ul><p class="purpose">A minimal library for handling wide C strings.</p>
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<p class="inwebparagraph"><a id="SP1"></a><b>§1. </b>By "wide string", we mean an array of <code class="display"><span class="extract-syntax">wchar_t</span></code>. A pointer to this type
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is what is returned by an L-literal in ANSI C, such as <code class="display"><span class="extract-syntax">L"look, I'm wide"</span></code>.
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A wide string is essentially a C string but with characters stored in full
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words instead of bytes. The character values should be Unicode code points.
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</p>
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<p class="inwebparagraph">We will do as little as possible with wide strings, and the following
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wrappers simply abstract the standard C library's handling.
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</p>
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<pre class="display">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Wide::len</span><button class="popup" onclick="togglePopup('usagePopup1')">...<span class="popuptext" id="usagePopup1">Usage of <b>Wide::len</b>:<br>Tries and Avinues - <a href="4-taa.html#SP2_3">§2.3</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">wcslen</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="inwebparagraph"><a id="SP2"></a><b>§2. </b>On the rare occasions when we need to sort alphabetically we'll also call:
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</p>
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<pre class="display">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Wide::cmp</span><button class="popup" onclick="togglePopup('usagePopup2')">...<span class="popuptext" id="usagePopup2">Usage of <b>Wide::cmp</b>:<br>HTML - <a href="5-htm.html#SP21">§21</a></span></button><span class="plain-syntax">(</span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> *</span><span class="identifier-syntax">A</span><span class="plain-syntax">, </span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> *</span><span class="identifier-syntax">B</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">wcscmp</span><span class="plain-syntax">(</span><span class="identifier-syntax">A</span><span class="plain-syntax">, </span><span class="identifier-syntax">B</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<p class="inwebparagraph"><a id="SP3"></a><b>§3. </b></p>
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<pre class="display">
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<span class="reserved-syntax">int</span><span class="plain-syntax"> </span><span class="function-syntax">Wide::atoi</span><button class="popup" onclick="togglePopup('usagePopup3')">...<span class="popuptext" id="usagePopup3">Usage of <b>Wide::atoi</b>:<br>none</span></button><span class="plain-syntax">(</span><span class="identifier-syntax">wchar_t</span><span class="plain-syntax"> *</span><span class="identifier-syntax">p</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> (</span><span class="reserved-syntax">int</span><span class="plain-syntax">) </span><span class="identifier-syntax">wcstol</span><span class="plain-syntax">(</span><span class="identifier-syntax">p</span><span class="plain-syntax">, </span><span class="identifier-syntax">NULL</span><span class="plain-syntax">, </span><span class="constant-syntax">10</span><span class="plain-syntax">);</span>
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<span class="plain-syntax">}</span>
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</pre>
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<ul class="toc"><li><a href="4-cst.html">Back to 'C Strings'</a></li><li><a href="4-sm.html">Continue with 'String Manipulation'</a></li></ul><hr class="tocbar">
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