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<ul class="crumbs"><li><a href="../index.html">Home</a></li><li><a href="../extensions.html">Kits</a></li><li><a href="index.html">BasicInformKit</a></li><li><b>Char Template</b></li></ul></div>
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<p class="purpose">To decide whether letters are upper or lower case, and convert between the two.</p>
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<ul class="toc"><li><a href="S-chr.html#SP1">§1. Char Is Of Case</a></li><li><a href="S-chr.html#SP2">§2. Char To Case</a></li><li><a href="S-chr.html#SP3">§3. Reversing Case</a></li><li><a href="S-chr.html#SP4">§4. DigitToValue</a></li><li><a href="S-chr.html#SP5">§5. Testing</a></li></ul><hr class="tocbar">
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<p class="commentary firstcommentary"><a id="SP1" class="paragraph-anchor"></a><b>§1. Char Is Of Case. </b>The following decides whether a character <span class="extract"><span class="extract-syntax">c</span></span> belongs to case <span class="extract"><span class="extract-syntax">case</span></span>, where
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0 means lower case and 1 means upper. <span class="extract"><span class="extract-syntax">c</span></span> is interpreted according to the
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character casing chart in "UnicodeData.i6t", which means, it will be
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ZSCII for the Z-machine and Unicode for Glulx.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax">[ </span><span class="identifier-syntax">CharIsOfCase</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> </span><span class="identifier-syntax">tab</span><span class="plain-syntax"> </span><span class="identifier-syntax">min</span><span class="plain-syntax"> </span><span class="identifier-syntax">max</span><span class="plain-syntax"> </span><span class="identifier-syntax">len</span><span class="plain-syntax"> </span><span class="identifier-syntax">par</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"><</span><span class="character-syntax">'A'</span><span class="plain-syntax">) </span><span class="reserved-syntax">rfalse</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">case</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> >= </span><span class="character-syntax">'a'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> <= </span><span class="character-syntax">'z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">rtrue</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">tab</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CharCasingChart0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> >= </span><span class="character-syntax">'A'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> <= </span><span class="character-syntax">'Z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">rtrue</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">tab</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CharCasingChart1</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"><128) </span><span class="reserved-syntax">rfalse</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">min</span><span class="plain-syntax"> = </span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">len</span><span class="plain-syntax"> = </span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">par</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">len</span><span class="plain-syntax"><0) { </span><span class="identifier-syntax">par</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="identifier-syntax">len</span><span class="plain-syntax"> = -</span><span class="identifier-syntax">len</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> < </span><span class="identifier-syntax">min</span><span class="plain-syntax">) </span><span class="reserved-syntax">rfalse</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> < </span><span class="identifier-syntax">min</span><span class="plain-syntax">+</span><span class="identifier-syntax">len</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">par</span><span class="plain-syntax">) { </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax">-</span><span class="identifier-syntax">min</span><span class="plain-syntax">) % </span><span class="constant-syntax">2</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="reserved-syntax">rtrue</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> { </span><span class="reserved-syntax">rtrue</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">rfalse</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="commentary firstcommentary"><a id="SP2" class="paragraph-anchor"></a><b>§2. Char To Case. </b>And the following converts character <span class="extract"><span class="extract-syntax">c</span></span> to the desired case, or returns
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it unchanged if it is not a letter with variant casings.
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax">[ </span><span class="identifier-syntax">CharToCase</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> </span><span class="identifier-syntax">tab</span><span class="plain-syntax"> </span><span class="identifier-syntax">min</span><span class="plain-syntax"> </span><span class="identifier-syntax">max</span><span class="plain-syntax"> </span><span class="identifier-syntax">len</span><span class="plain-syntax"> </span><span class="identifier-syntax">par</span><span class="plain-syntax"> </span><span class="identifier-syntax">del</span><span class="plain-syntax"> </span><span class="identifier-syntax">f</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"><</span><span class="character-syntax">'A'</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">case</span><span class="plain-syntax"> == </span><span class="constant-syntax">1</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> >= </span><span class="character-syntax">'a'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> <= </span><span class="character-syntax">'z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">-32;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">tab</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CharCasingChart0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> } </span><span class="reserved-syntax">else</span><span class="plain-syntax"> {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax"> >= </span><span class="character-syntax">'A'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> <= </span><span class="character-syntax">'Z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">+32;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">tab</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CharCasingChart1</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"><128) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">while</span><span class="plain-syntax"> (</span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">min</span><span class="plain-syntax"> = </span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">len</span><span class="plain-syntax"> = </span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">del</span><span class="plain-syntax"> = </span><span class="identifier-syntax">tab</span><span class="plain-syntax">--></span><span class="identifier-syntax">i</span><span class="plain-syntax">; </span><span class="identifier-syntax">i</span><span class="plain-syntax">++;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">par</span><span class="plain-syntax"> = </span><span class="constant-syntax">0</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">len</span><span class="plain-syntax"><0) { </span><span class="identifier-syntax">par</span><span class="plain-syntax"> = </span><span class="constant-syntax">1</span><span class="plain-syntax">; </span><span class="identifier-syntax">len</span><span class="plain-syntax"> = -</span><span class="identifier-syntax">len</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> < </span><span class="identifier-syntax">min</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">c</span><span class="plain-syntax"> < </span><span class="identifier-syntax">min</span><span class="plain-syntax">+</span><span class="identifier-syntax">len</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">f</span><span class="plain-syntax"> = </span><span class="reserved-syntax">false</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">par</span><span class="plain-syntax">) { </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">c</span><span class="plain-syntax">-</span><span class="identifier-syntax">min</span><span class="plain-syntax">) % </span><span class="constant-syntax">2</span><span class="plain-syntax"> == </span><span class="constant-syntax">0</span><span class="plain-syntax">) </span><span class="identifier-syntax">f</span><span class="plain-syntax"> = </span><span class="reserved-syntax">true</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">else</span><span class="plain-syntax"> { </span><span class="identifier-syntax">f</span><span class="plain-syntax"> = </span><span class="reserved-syntax">true</span><span class="plain-syntax">; }</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">f</span><span class="plain-syntax">) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">del</span><span class="plain-syntax"> == </span><span class="identifier-syntax">UNIC_NCT</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</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">c</span><span class="plain-syntax">+</span><span class="identifier-syntax">del</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax"> }</span>
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<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">c</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="commentary firstcommentary"><a id="SP3" class="paragraph-anchor"></a><b>§3. Reversing Case. </b>It's convenient to provide this relatively fast routine to reverse the
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case of a letter since this is an operation used frequently in regular
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expression matching (see "RegExp.i6t").
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</p>
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax">#</span><span class="identifier-syntax">IFDEF</span><span class="plain-syntax"> </span><span class="identifier-syntax">TARGET_ZCODE</span><span class="plain-syntax">;</span>
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<span class="plain-syntax">[ </span><span class="identifier-syntax">TEXT_TY_RevCase</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"><</span><span class="character-syntax">'A'</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="character-syntax">'a'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="character-syntax">'z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-</span><span class="character-syntax">'a'</span><span class="plain-syntax">+</span><span class="character-syntax">'A'</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="character-syntax">'A'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="character-syntax">'Z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-</span><span class="character-syntax">'A'</span><span class="plain-syntax">+</span><span class="character-syntax">'a'</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"><128) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">155</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">157</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+3; </span><span class="comment-syntax">a, o, u umlaut in ZSCII</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">158</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">160</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-3; </span><span class="comment-syntax">A, O, U umlaut</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">164</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">165</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+3; </span><span class="comment-syntax">e, i umlaut</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">167</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">168</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-3; </span><span class="comment-syntax">E, I umlaut</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">169</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">174</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+6; </span><span class="comment-syntax">a, e, i, o, u, y acute</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">175</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">180</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-6; </span><span class="comment-syntax">A, E, I, O, U, Y acute</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">181</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">185</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+5; </span><span class="comment-syntax">a, e, i, o, u grave</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">186</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">190</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-5; </span><span class="comment-syntax">A, E, I, O, U grave</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">191</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">195</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+5; </span><span class="comment-syntax">a, e, i, o, u circumflex</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">196</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">200</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-5; </span><span class="comment-syntax">A, E, I, O, U circumflex</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">201</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">202</span><span class="plain-syntax">; </span><span class="comment-syntax">a circle</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">202</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">201</span><span class="plain-syntax">; </span><span class="comment-syntax">A circle</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">203</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">204</span><span class="plain-syntax">; </span><span class="comment-syntax">o slash</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">204</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">203</span><span class="plain-syntax">; </span><span class="comment-syntax">O slash</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">205</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">207</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+3; </span><span class="comment-syntax">a, n, o tilde</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="constant-syntax">208</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="constant-syntax">210</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-3; </span><span class="comment-syntax">A, N, O tilde</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">211</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">212</span><span class="plain-syntax">; </span><span class="comment-syntax">ae ligature</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">212</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">211</span><span class="plain-syntax">; </span><span class="comment-syntax">AE ligature</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">213</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">214</span><span class="plain-syntax">; </span><span class="comment-syntax">c cedilla</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">214</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">213</span><span class="plain-syntax">; </span><span class="comment-syntax">C cedilla</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">215</span><span class="plain-syntax"> </span><span class="reserved-syntax">or</span><span class="plain-syntax"> </span><span class="constant-syntax">216</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">+2; </span><span class="comment-syntax">thorn, eth</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">217</span><span class="plain-syntax"> </span><span class="reserved-syntax">or</span><span class="plain-syntax"> </span><span class="constant-syntax">218</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-2; </span><span class="comment-syntax">Thorn, Eth</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">220</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">221</span><span class="plain-syntax">; </span><span class="comment-syntax">oe ligature</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> == </span><span class="constant-syntax">221</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="constant-syntax">220</span><span class="plain-syntax">; </span><span class="comment-syntax">OE ligature</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">];</span>
|
|
<span class="plain-syntax">#</span><span class="identifier-syntax">IFNOT</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">[ </span><span class="identifier-syntax">TEXT_TY_RevCase</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"><</span><span class="character-syntax">'A'</span><span class="plain-syntax">) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="character-syntax">'a'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="character-syntax">'z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-</span><span class="character-syntax">'a'</span><span class="plain-syntax">+</span><span class="character-syntax">'A'</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> >= </span><span class="character-syntax">'A'</span><span class="plain-syntax">) && (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"> <= </span><span class="character-syntax">'Z'</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">-</span><span class="character-syntax">'A'</span><span class="plain-syntax">+</span><span class="character-syntax">'a'</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">ch</span><span class="plain-syntax"><128) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">CharIsOfCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">ch</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">CharToCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">ch</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">);</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">CharIsOfCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">ch</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">CharToCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">ch</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">);</span>
|
|
<span class="plain-syntax"> </span><span class="reserved-syntax">return</span><span class="plain-syntax"> </span><span class="identifier-syntax">ch</span><span class="plain-syntax">;</span>
|
|
<span class="plain-syntax">];</span>
|
|
<span class="plain-syntax">#</span><span class="identifier-syntax">ENDIF</span><span class="plain-syntax">;</span>
|
|
</pre>
|
|
<p class="commentary firstcommentary"><a id="SP4" class="paragraph-anchor"></a><b>§4. DigitToValue. </b>This takes a ZSCII or Unicode character code and returns its value as a digit,
|
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or returns \(-1\) if it isn't a digit.
|
|
</p>
|
|
|
|
<pre class="displayed-code all-displayed-code code-font">
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|
<span class="plain-syntax">[ </span><span class="identifier-syntax">DigitToValue</span><span class="plain-syntax"> </span><span class="identifier-syntax">c</span><span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="identifier-syntax">n</span><span class="plain-syntax"> = </span><span class="identifier-syntax">c</span><span class="plain-syntax">-</span><span class="character-syntax">'0'</span><span class="plain-syntax">;</span>
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|
<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">n</span><span class="plain-syntax"><0) || (</span><span class="identifier-syntax">n</span><span class="plain-syntax">>9)) </span><span class="reserved-syntax">return</span><span class="plain-syntax"> -1;</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">n</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="commentary firstcommentary"><a id="SP5" class="paragraph-anchor"></a><b>§5. Testing. </b>Not actually used: simply for testing the tables.
|
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</p>
|
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|
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<pre class="displayed-code all-displayed-code code-font">
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<span class="plain-syntax">[ </span><span class="identifier-syntax">CharTestCases</span><span class="plain-syntax"> </span><span class="identifier-syntax">case</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">for</span><span class="plain-syntax"> (</span><span class="identifier-syntax">i</span><span class="plain-syntax">=32: </span><span class="identifier-syntax">i</span><span class="plain-syntax"><</span><span class="constant-syntax">$E0</span><span class="plain-syntax">: </span><span class="identifier-syntax">i</span><span class="plain-syntax">++) {</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> ((</span><span class="identifier-syntax">i</span><span class="plain-syntax">>=127) && (</span><span class="identifier-syntax">i</span><span class="plain-syntax"><155)) </span><span class="reserved-syntax">continue</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="string-syntax">" - "</span><span class="plain-syntax">, (</span><span class="identifier-syntax">char</span><span class="plain-syntax">) </span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="string-syntax">" -"</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">CharIsOfCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">)) </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">" lower"</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">CharIsOfCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">)) </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">" upper"</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CharToCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">0</span><span class="plain-syntax">); </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">j</span><span class="plain-syntax"> ~= </span><span class="identifier-syntax">i</span><span class="plain-syntax">) </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">" tolower: "</span><span class="plain-syntax">, (</span><span class="identifier-syntax">char</span><span class="plain-syntax">) </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="identifier-syntax">j</span><span class="plain-syntax"> = </span><span class="identifier-syntax">CharToCase</span><span class="plain-syntax">(</span><span class="identifier-syntax">i</span><span class="plain-syntax">, </span><span class="constant-syntax">1</span><span class="plain-syntax">); </span><span class="reserved-syntax">if</span><span class="plain-syntax"> (</span><span class="identifier-syntax">j</span><span class="plain-syntax"> ~= </span><span class="identifier-syntax">i</span><span class="plain-syntax">) </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">" toupper: "</span><span class="plain-syntax">, (</span><span class="identifier-syntax">char</span><span class="plain-syntax">) </span><span class="identifier-syntax">j</span><span class="plain-syntax">;</span>
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<span class="plain-syntax"> </span><span class="reserved-syntax">print</span><span class="plain-syntax"> </span><span class="string-syntax">"^"</span><span class="plain-syntax">;</span>
|
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<span class="plain-syntax"> }</span>
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<span class="plain-syntax">];</span>
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</pre>
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