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2017-11-06 13:38:19 +01:00
<html><head><meta http-equiv="X-UA-Compatible" content="IE=edge" /><link rel="shortcut icon" href="../icons/favicon.ico" /><link rel="stylesheet" type="text/css" href="../styles/branding.css" /><link rel="stylesheet" type="text/css" href="../styles/branding-en-US.css" /><script type="text/javascript" src="../scripts/branding.js"> </script><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>gmp_lib._mpz_realloc Method </title><meta name="Language" content="en-us" /><meta name="System.Keywords" content="_mpz_realloc method" /><meta name="System.Keywords" content="gmp_lib._mpz_realloc method" /><meta name="Microsoft.Help.F1" content="Math.Gmp.Native.gmp_lib._mpz_realloc" /><meta name="Microsoft.Help.Id" content="M:Math.Gmp.Native.gmp_lib._mpz_realloc(Math.Gmp.Native.mpz_t,Math.Gmp.Native.mp_size_t)" /><meta name="Description" content="Change the space for to limbs." /><meta name="Microsoft.Help.ContentType" content="Reference" /><meta name="BrandingAware" content="true" /><meta name="container" content="Math.Gmp.Native" /><meta name="file" content="c9cb6a67-59b8-5c03-f31d-f252441c53f6" /><meta name="guid" content="c9cb6a67-59b8-5c03-f31d-f252441c53f6" /><link type="text/css" rel="stylesheet" href="../styles/highlight.css" /><script type="text/javascript" src="../scripts/highlight.js"> </script><link rel="stylesheet" type="text/css" href="../styles/branding-Website.css" /><script type="text/javascript" src="../scripts/jquery-1.11.0.min.js"></script><script type="text/javascript" src="../scripts/branding-Website.js"></script><script type="text/javascript" src="../scripts/clipboard.min.js"></script></head><body onload="OnLoad('cs')"><input type="hidden" id="userDataCache" class="userDataStyle" /><div class="pageHeader" id="PageHeader">GMP Native Interface for .NET<form id="SearchForm" method="get" action="#" onsubmit="javascript:TransferToSearchPage(); return false;"><input id="SearchTextBox" type="text" maxlength="200" /><button id="SearchButton" type="submit"></button></form></div><div class="pageBody"><div class="leftNav" id="leftNav"><div id="tocNav"><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="javascript: Toggle(this);" href="#!" /><a data-tochassubtree="true" href="846f5c8a-6cba-433e-9f18-cde2ff5695cd.htm" title="GMP Native Interface for .NET" tocid="roottoc">GMP Native Interface for .NET</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="javascript: Toggle(this);" href="#!" /><a data-tochassubtree="true" href="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm" title="Math.Gmp.Native" tocid="d9c51b9f-0c54-770b-28ea-6eebd8fef368">Math.Gmp.Native</a></div><div class="toclevel0" data-toclevel="0"><a class="tocCollapsed" onclick="javascript: Toggle(this);" href="#!" /><a data-tochassubtree="true" href="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm" title="gmp_lib Class" tocid="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f">gmp_lib Class</a></div><div class="toclevel1" data-toclevel="1" data-childrenloaded="true"><a class="tocExpanded" onclick="javascript: Toggle(this);" href="#!" /><a data-tochassubtree="true" href="0fa7cbf3-e8f4-6b14-d829-8aa663e77c74.htm" title="gmp_lib Methods" tocid="0fa7cbf3-e8f4-6b14-d829-8aa663e77c74">gmp_lib Methods</a></div><div class="toclevel2 current" data-toclevel="2"><a data-tochassubtree="false" href="c9cb6a67-59b8-5c03-f31d-f252441c53f6.htm" title="_mpz_realloc Method " tocid="c9cb6a67-59b8-5c03-f31d-f252441c53f6">_mpz_realloc Method </a></div><div class="toclevel2" data-toclevel="2"><a data-tochassubtree="false" href="2c68671c-cd5c-e2ec-52a2-65b0ca31c3d1.htm" title="allocate Method " tocid="2c68671c-cd5c-e2ec-52a2-65b0ca31c3d1">allocate Method </a></div><div class="toclevel2" data-toclevel="2"><a class="tocCollapsed" onclick="javascript: Toggle(this);" href="#!" /><a data-tochassubtree="true" href="92160da3-b1af-e005-cb05-e3fb4dd524d8.htm" title="free Method " tocid="92160da3-b1af-e005-cb05-e3fb4dd524d8">free Method </a></div><div class="toclevel2" data-toclevel="2"><a data-tochassubtree="false" href="fe6e46c3-8464-a080-b5fc-7
2017-11-04 16:02:37 +01:00
Change the space for <span class="parameter">integer</span> to <span class="parameter">new_alloc</span> limbs.
</div><p> </p>
<strong>Namespace:</strong>
 <a href="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm">Math.Gmp.Native</a><br />
<strong>Assembly:</strong>
 Math.Gmp.Native (in Math.Gmp.Native.dll) Version: 1.0.0.0 (1.0.0.0)<div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('ID1RB')" onkeypress="SectionExpandCollapse_CheckKey('ID1RB', event)" tabindex="0"><img id="ID1RBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Syntax</span></div><div id="ID1RBSection" class="collapsibleSection"><div class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="ID0EDCA_tab1" class="codeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','cs','1','4');return false;">C#</a></div><div id="ID0EDCA_tab2" class="codeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','vb','2','4');return false;">VB</a></div><div id="ID0EDCA_tab3" class="codeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','cpp','3','4');return false;">C++</a></div><div id="ID0EDCA_tab4" class="codeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDCA','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="ID0EDCA_copyCode" href="#" class="copyCodeSnippet" onclick="javascript:CopyToClipboard('ID0EDCA');return false;" title="Copy">Copy</a></div></div><div id="ID0EDCA_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">_mpz_realloc</span>(
<span class="identifier">mpz_t</span> <span class="parameter">integer</span>,
<span class="identifier">mp_size_t</span> <span class="parameter">new_alloc</span>
)</pre></div><div id="ID0EDCA_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">Public</span> <span class="keyword">Shared</span> <span class="keyword">Sub</span> <span class="identifier">_mpz_realloc</span> (
<span class="parameter">integer</span> <span class="keyword">As</span> <span class="identifier">mpz_t</span>,
<span class="parameter">new_alloc</span> <span class="keyword">As</span> <span class="identifier">mp_size_t</span>
)</pre></div><div id="ID0EDCA_code_Div3" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">public</span>:
<span class="keyword">static</span> <span class="keyword">void</span> <span class="identifier">_mpz_realloc</span>(
<span class="identifier">mpz_t</span>^ <span class="parameter">integer</span>,
<span class="identifier">mp_size_t</span> <span class="parameter">new_alloc</span>
)</pre></div><div id="ID0EDCA_code_Div4" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="keyword">static</span> <span class="keyword">member</span> <span class="identifier">_mpz_realloc</span> :
<span class="parameter">integer</span> : <span class="identifier">mpz_t</span> *
<span class="parameter">new_alloc</span> : <span class="identifier">mp_size_t</span> <span class="keyword">-&gt;</span> <span class="keyword">unit</span>
</pre></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDCA");</script><h4 class="subHeading">Parameters</h4><dl><dt><span class="parameter">integer</span></dt><dd>Type: <a href="8beda7fb-bbc4-b56f-fd1f-1459377ecb3b.htm">Math.Gmp.Native<span id="LST797015E5_1"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_t</a><br />The integer to resize.</dd><dt><span class="parameter">new_alloc</span></dt><dd>Type: <a href="4b58a584-7a0e-b600-18fa-ebd493861eb3.htm">Math.Gmp.Native<span id="LST797015E5_2"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_size_t</a><br />The new number of limbs.</dd></dl></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('ID2RB')" onkeypress="SectionExpandCollapse_CheckKey('ID2RB', event)" tabindex="0"><img id="ID2RBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Remarks</span></div><div id="ID2RBSection" class="collapsibleSection"><p>
2017-11-08 01:29:10 +01:00
The value in <span class="parameter">integer</span> is preserved if it fits, or is set to 0 if not.
2017-11-04 16:02:37 +01:00
</p><p><a href="1de9b70a-1d21-8168-e41c-1c259f64091a.htm">mpz_realloc2(mpz_t, mp_bitcnt_t)</a> is the preferred way to accomplish allocation changes like this.
<a href="1de9b70a-1d21-8168-e41c-1c259f64091a.htm">mpz_realloc2(mpz_t, mp_bitcnt_t)</a> and <span class="selflink">_mpz_realloc(mpz_t, mp_size_t)</span> are the same except that
<span class="selflink">_mpz_realloc(mpz_t, mp_size_t)</span> takes its size in limbs.
</p></div><div class="collapsibleAreaRegion"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('ID3RB')" onkeypress="SectionExpandCollapse_CheckKey('ID3RB', event)" tabindex="0"><img id="ID3RBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />Examples</span></div><div id="ID3RBSection" class="collapsibleSection"><div class="codeSnippetContainer"><div class="codeSnippetContainerTabs"><div id="ID0EDAABA_tab1" class="codeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDAABA','cs','1','4');return false;">C#</a></div><div id="ID0EDAABA_tab2" class="codeSnippetContainerTab"><a href="#" onclick="javascript:ChangeTab('ID0EDAABA','vb','2','4');return false;">VB</a></div><div id="ID0EDAABA_tab3" class="codeSnippetContainerTabPhantom"><a href="#" onclick="javascript:ChangeTab('ID0EDAABA','cpp','3','4');return false;">C++</a></div><div id="ID0EDAABA_tab4" class="codeSnippetContainerTabPhantom"><a href="#" onclick="javascript:ChangeTab('ID0EDAABA','fs','4','4');return false;">F#</a></div></div><div class="codeSnippetContainerCodeContainer"><div class="codeSnippetToolBar"><div class="codeSnippetToolBarText"><a id="ID0EDAABA_copyCode" href="#" class="copyCodeSnippet" onclick="javascript:CopyToClipboard('ID0EDAABA');return false;" title="Copy">Copy</a></div></div><div id="ID0EDAABA_code_Div1" class="codeSnippetContainerCode" style="display: block"><pre xml:space="preserve"><span class="highlight-comment">// Create and initialize new integer x.</span>
mpz_t x = <span class="highlight-keyword">new</span> mpz_t();
gmp_lib.mpz_init(x);
<span class="highlight-comment">// Set the value of x to a 77-bit integer.</span>
char_ptr <span class="highlight-keyword">value</span> = <span class="highlight-keyword">new</span> char_ptr(<span class="highlight-literal">"1000 0000 0000 0000 0000"</span>);
gmp_lib.mpz_set_str(x, <span class="highlight-keyword">value</span>, <span class="highlight-number">16</span>);
<span class="highlight-comment">// Resize x to 50 limbs, and assert that its value has not changed.</span>
gmp_lib._mpz_realloc(x, <span class="highlight-number">50</span>);
char_ptr s = gmp_lib.mpz_get_str(char_ptr.Zero, <span class="highlight-number">16</span>, x);
Assert.IsTrue(s.ToString() == <span class="highlight-literal">"1000 0000 0000 0000 0000"</span>.Replace(<span class="highlight-literal">" "</span>, <span class="highlight-literal">""</span>));
<span class="highlight-comment">// Resize x to 1 limb, and assert that its value has changed to 0.</span>
gmp_lib._mpz_realloc(x, <span class="highlight-number">1</span>);
Assert.IsTrue(gmp_lib.mpz_get_si(x) == <span class="highlight-number">0</span>);
<span class="highlight-comment">// Release unmanaged memory allocated for x and string values.</span>
gmp_lib.mpz_clear(x);
gmp_lib.free(<span class="highlight-keyword">value</span>);
gmp_lib.free(s);</pre></div><div id="ID0EDAABA_code_Div2" class="codeSnippetContainerCode" style="display: none"><pre xml:space="preserve"><span class="highlight-comment">' Create and initialize new integer x.</span>
<span class="highlight-keyword">Dim</span> x <span class="highlight-keyword">As</span> <span class="highlight-keyword">New</span> mpz_t()
gmp_lib.mpz_init(x)
<span class="highlight-comment">' Set the value of x to a 77-bit integer.</span>
<span class="highlight-keyword">Dim</span> value <span class="highlight-keyword">As</span> <span class="highlight-keyword">New</span> char_ptr(<span class="highlight-literal">"1000 0000 0000 0000 0000"</span>)
gmp_lib.mpz_set_str(x, value, <span class="highlight-number">16</span>)
<span class="highlight-comment">' Resize x to 50 limbs, and assert that its value has not changed.</span>
gmp_lib._mpz_realloc(x, <span class="highlight-number">50</span>)
<span class="highlight-keyword">Dim</span> s <span class="highlight-keyword">As</span> char_ptr = gmp_lib.mpz_get_str(char_ptr.Zero, <span class="highlight-number">16</span>, x)
Assert.IsTrue(s.ToString() = <span class="highlight-literal">"1000 0000 0000 0000 0000"</span>.Replace(<span class="highlight-literal">" "</span>, <span class="highlight-literal">""</span>))
<span class="highlight-comment">' Resize x to 1 limb, and assert that its value has changed to 0.</span>
gmp_lib._mpz_realloc(x, <span class="highlight-number">1</span>)
Assert.IsTrue(gmp_lib.mpz_get_si(x) = <span class="highlight-number">0</span>)
<span class="highlight-comment">' Release unmanaged memory allocated for x and string values.</span>
gmp_lib.mpz_clear(x)
gmp_lib.free(value)
gmp_lib.free(s)</pre></div><div id="ID0EDAABA_code_Div3" class="codeSnippetContainerCode" style="display: none"><p>No code example is currently available or this language may not be supported.</p></div><div id="ID0EDAABA_code_Div4" class="codeSnippetContainerCode" style="display: none"><p>No code example is currently available or this language may not be supported.</p></div></div></div><script type="text/javascript">AddLanguageTabSet("ID0EDAABA");</script></div><div class="collapsibleAreaRegion" id="seeAlsoSection"><span class="collapsibleRegionTitle" onclick="SectionExpandCollapse('ID4RB')" onkeypress="SectionExpandCollapse_CheckKey('ID4RB', event)" tabindex="0"><img id="ID4RBToggle" class="collapseToggle" src="../icons/SectionExpanded.png" />See Also</span></div><div id="ID4RBSection" class="collapsibleSection"><h4 class="subHeading">Reference</h4><div class="seeAlsoStyle"><a href="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm">gmp_lib Class</a></div><div class="seeAlsoStyle"><a href="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm">Math.Gmp.Native Namespace</a></div><div class="seeAlsoStyle"><a href="1de9b70a-1d21-8168-e41c-1c259f64091a.htm">gmp_lib<span id="LST797015E5_3"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_3?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_realloc2(mpz_t, mp_bitcnt_t)</a></div><div class="seeAlsoStyle"><a href="1dfbf5da-f4c2-bbab-5708-3b31d40e4f16.htm">gmp_lib<span id="LST797015E5_4"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_getlimbn(mpz_t, mp_size_t)</a></div><div class="seeAlsoStyle"><a href="9a169dd9-42b0-ea59-abbe-4efc6b870c75.htm">gmp_lib<span id="LST797015E5_5"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_5?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_size(mpz_t)</a></div><div class="seeAlsoStyle"><a href="4b08344c-f506-a717-4e1d-112cd19f5286.htm">gmp_lib<span id="LST797015E5_6"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_6?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_limbs_read(mpz_t)</a></div><div class="seeAlsoStyle"><a href="86ddbf69-57f6-af58-bd13-3eca06123b29.htm">gmp_lib<span id="LST797015E5_7"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_7?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_limbs_write(mpz_t, mp_size_t)</a></div><div class="seeAlsoStyle"><a href="87f5432d-aacb-57b6-b4a7-e4dc803684a4.htm">gmp_lib<span id="LST797015E5_8"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_8?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_limbs_modify(mpz_t, mp_size_t)</a></div><div class="seeAlsoStyle"><a href="398e3eb8-0f55-086f-a765-0a8b3c9307e0.htm">gmp_lib<span id="LST797015E5_9"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_9?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_limbs_finish(mpz_t, mp_size_t)</a></div><div class="seeAlsoStyle"><a href="5786e0c6-2dde-406f-b86d-3df6757c80c0.htm">gmp_lib<span id="LST797015E5_10"></span><script type="text/javascript">AddLanguageSpecificTextSet("LST797015E5_10?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mpz_roinit_n(mpz_t, mp_ptr, mp_size_t)</a></div><div class="seeAlsoStyle"><a href="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm"><a href="https://gmplib.org/manual/Integer-Special-Functions.html#Integer-Special-Functions">GNU MP - Integer Special Functions</a></a></div></div></div></div><div id="pageFooter" class="pageFooter"> </div></body></html>