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+    <h1 id="firstHeading" class="firstHeading">wcstol, wcstoll</h1>            <table class="t-dcl-begin"> <tr class="t-dsc-header"> <th> Defined in header <code>&lt;wchar.h&gt;</code> </th> <th> </th> <th> </th> </tr>   <tr class="t-dcl t-since-c95 t-until-c99"> <td><pre data-language="c">long      wcstol( const wchar_t * str, wchar_t ** str_end, int base );</pre></td> <td class="t-dcl-nopad"> </td> <td>
+<span class="t-mark-rev t-since-c95">(since C95)</span> <br><span class="t-mark-rev t-until-c99">(until C99)</span>
+</td> </tr> <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">long      wcstol( const wchar_t * restrict str, wchar_t ** restrict str_end,
+                  int base );</pre>
+</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr>  <tr class="t-dcl t-since-c99"> <td> <pre data-language="c">long long wcstoll( const wchar_t * restrict str, wchar_t ** restrict str_end,
+                   int base );</pre>
+</td> <td class="t-dcl-nopad"> </td> <td> <span class="t-mark-rev t-since-c99">(since C99)</span> </td> </tr>  </table> <p>Interprets an integer value in a wide string pointed to by <code>str</code>.</p>
+<p>Discards any whitespace characters (as identified by calling <a href="iswspace" title="c/string/wide/iswspace"><code>iswspace</code></a>) until the first non-whitespace character is found, then takes as many characters as possible to form a valid <i>base-n</i> (where n=<code>base</code>) integer number representation and converts them to an integer value. The valid integer value consists of the following parts:</p>
+<ul>
+<li> <span class="t-mark">(optional)</span> plus or minus sign </li>
+<li> <span class="t-mark">(optional)</span> prefix (<code>0</code>) indicating octal base (applies only when the base is <code>8</code> or <code>​0​</code>) </li>
+<li> <span class="t-mark">(optional)</span> prefix (<code>0x</code> or <code>0X</code>) indicating hexadecimal base (applies only when the base is <code>16</code> or <code>​0​</code>) </li>
+<li> a sequence of digits </li>
+</ul> <p>The set of valid values for base is <code>{0,2,3,...,36}.</code> The set of valid digits for base-<code>2</code> integers is <code>{0,1},</code> for base-<code>3</code> integers is <code>{0,1,2},</code> and so on. For bases larger than <code>10</code>, valid digits include alphabetic characters, starting from <code>Aa</code> for base-<code>11</code> integer, to <code>Zz</code> for base-<code>36</code> integer. The case of the characters is ignored.</p>
+<p>Additional numeric formats may be accepted by the currently installed C <a href="../../locale/setlocale" title="c/locale/setlocale">locale</a>.</p>
+<p>If the value of <code>base</code> is <code>​0​</code>, the numeric base is auto-detected: if the prefix is <code>0</code>, the base is octal, if the prefix is <code>0x</code> or <code>0X</code>, the base is hexadecimal, otherwise the base is decimal.</p>
+<p>If the minus sign was part of the input sequence, the numeric value calculated from the sequence of digits is negated as if by <a href="../../language/operator_arithmetic#Unary_arithmetic" title="c/language/operator arithmetic">unary minus</a> in the result type.</p>
+<p>The functions sets the pointer pointed to by <code>str_end</code> to point to the wide character past the last character interpreted. If <code>str_end</code> is a null pointer, it is ignored.</p>
+<h3 id="Parameters"> Parameters</h3> <table class="t-par-begin"> <tr class="t-par"> <td> str </td> <td> - </td> <td> pointer to the null-terminated wide string to be interpreted </td>
+</tr> <tr class="t-par"> <td> str_end </td> <td> - </td> <td> pointer to a pointer to wide character </td>
+</tr> <tr class="t-par"> <td> base </td> <td> - </td> <td> <i>base</i> of the interpreted integer value </td>
+</tr>
+</table> <h3 id="Return_value"> Return value</h3> <p>Integer value corresponding to the contents of <code>str</code> on success. If the converted value falls out of range of corresponding return type, range error occurs and <code><a href="../../types/limits" title="c/types/limits">LONG_MAX</a></code>, <code><a href="../../types/limits" title="c/types/limits">LONG_MIN</a></code>, <code><a href="../../types/limits" title="c/types/limits">LLONG_MAX</a></code> or <code><a href="../../types/limits" title="c/types/limits">LLONG_MIN</a></code> is returned. If no conversion can be performed, <code>​0​</code> is returned.</p>
+<h3 id="Example"> Example</h3> <div class="t-example"> <div class="c source-c"><pre data-language="c">#include &lt;stdio.h&gt;
+#include &lt;errno.h&gt;
+#include &lt;wchar.h&gt;
+ 
+int main(void)
+{
+    const wchar_t *p = L"10 200000000000000000000000000000 30 -40";
+    printf("Parsing L'%ls':\n", p);
+    wchar_t *end;
+    for (long i = wcstol(p, &amp;end, 10);
+         p != end;
+         i = wcstol(p, &amp;end, 10))
+    {
+        printf("'%.*ls' -&gt; ", (int)(end-p), p);
+        p = end;
+        if (errno == ERANGE){
+            printf("range error, got ");
+            errno = 0;
+        }
+        printf("%ld\n", i);
+    }
+}</pre></div> <p>Output:</p>
+<div class="text source-text"><pre data-language="c">Parsing L'10 200000000000000000000000000000 30 -40':
+'10' -&gt; 10
+' 200000000000000000000000000000' -&gt; range error, got 9223372036854775807
+' 30' -&gt; 30
+' -40' -&gt; -40</pre></div> </div> <h3 id="References"> References</h3>  <ul>
+<li> C11 standard (ISO/IEC 9899:2011): </li>
+<ul><li> 7.29.4.1.2 The wcstol, wcstoll, wcstoul, and wcstoull functions (p: 429-430) </li></ul>
+<li> C99 standard (ISO/IEC 9899:1999): </li>
+<ul><li> 7.24.4.1.2 The wcstol, wcstoll, wcstoul, and wcstoull functions (p: 375-376) </li></ul>
+</ul>      <h3 id="See_also"> See also</h3> <table class="t-dsc-begin"> <tr class="t-dsc"> <td> <div><a href="../byte/strtol" title="c/string/byte/strtol"> <span class="t-lines"><span>strtol</span><span>strtoll</span></span></a></div>
+<div><span class="t-lines"><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> converts a byte string to an integer value <br> <span class="t-mark">(function)</span>  </td>
+</tr> <tr class="t-dsc"> <td> <div><a href="wcstoul" title="c/string/wide/wcstoul"> <span class="t-lines"><span>wcstoul</span><span>wcstoull</span></span></a></div>
+<div><span class="t-lines"><span><span class="t-mark-rev t-since-c95">(C95)</span></span><span><span class="t-mark-rev t-since-c99">(C99)</span></span></span></div> </td> <td> converts a wide string to an unsigned integer value <br> <span class="t-mark">(function)</span>  </td>
+</tr> <tr class="t-dsc"> <td colspan="2"> <span><a href="https://en.cppreference.com/w/cpp/string/wide/wcstol" title="cpp/string/wide/wcstol">C++ documentation</a></span> for <code>wcstol, wcstoll</code> </td>
+</tr> </table>           <div class="_attribution">
+  <p class="_attribution-p">
+    &copy; cppreference.com<br>Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.<br>
+    <a href="https://en.cppreference.com/w/c/string/wide/wcstol" class="_attribution-link">https://en.cppreference.com/w/c/string/wide/wcstol</a>
+  </p>
+</div>