<html><head><metahttp-equiv="X-UA-Compatible"content="IE=edge"/><linkrel="shortcut icon"href="../icons/favicon.ico"/><linkrel="stylesheet"type="text/css"href="../styles/branding.css"/><linkrel="stylesheet"type="text/css"href="../styles/branding-en-US.css"/><scripttype="text/javascript"src="../scripts/branding.js"></script><metahttp-equiv="Content-Type"content="text/html; charset=UTF-8"/><title>gmp_lib.mpn_cnd_swap Method </title><metaname="Language"content="en-us"/><metaname="System.Keywords"content="mpn_cnd_swap method"/><metaname="System.Keywords"content="gmp_lib.mpn_cnd_swap method"/><metaname="Microsoft.Help.F1"content="Math.Gmp.Native.gmp_lib.mpn_cnd_swap"/><metaname="Microsoft.Help.Id"content="M:Math.Gmp.Native.gmp_lib.mpn_cnd_swap(Math.Gmp.Native.mp_limb_t,Math.Gmp.Native.mp_ptr,Math.Gmp.Native.mp_ptr,Math.Gmp.Native.mp_size_t)"/><metaname="Description"content="If is non-zero, swaps the contents of the areas {, } and {, }. Otherwise, the areas are left unmodified."/><metaname="Microsoft.Help.ContentType"content="Reference"/><metaname="BrandingAware"content="true"/><metaname="container"content="Math.Gmp.Native"/><metaname="file"content="f0985ccc-17da-8a0b-066c-53df9b1921a1"/><metaname="guid"content="f0985ccc-17da-8a0b-066c-53df9b1921a1"/><linktype="text/css"rel="stylesheet"href="../styles/highlight.css"/><scripttype="text/javascript"src="../scripts/highlight.js"></script><linkrel="stylesheet"type="text/css"href="../styles/branding-Website.css"/><scripttype="text/javascript"src="../scripts/jquery-1.11.0.min.js"></script><scripttype="text/javascript"src="../scripts/branding-Website.js"></script><scripttype="text/javascript"src="../scripts/clipboard.min.js"></script></head><bodyonload="OnLoad('cs')"><inputtype="hidden"id="userDataCache"class="userDataStyle"/><divclass="pageHeader"id="PageHeader">GMP Native Interface for .NET<formid="SearchForm"method="get"action="#"onsubmit="javascript:TransferToSearchPage(); return false;"><inputid="SearchTextBox"type="text"maxlength="200"/><buttonid="SearchButton"type="submit"></button></form></div><divclass="pageBody"><divclass="leftNav"id="leftNav"><divid="tocNav"><divclass="toclevel0"data-toclevel="0"><aclass="tocCollapsed"onclick="javascript: Toggle(this);"href="#!"/><adata-tochassubtree="true"href="846f5c8a-6cba-433e-9f18-cde2ff5695cd.htm"title="GMP Native Interface for .NET"tocid="roottoc">GMP Native Interface for .NET</a></div><divclass="toclevel0"data-toclevel="0"><aclass="tocCollapsed"onclick="javascript: Toggle(this);"href="#!"/><adata-tochassubtree="true"href="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm"title="Math.Gmp.Native"tocid="d9c51b9f-0c54-770b-28ea-6eebd8fef368">Math.Gmp.Native</a></div><divclass="toclevel0"data-toclevel="0"><aclass="tocCollapsed"onclick="javascript: Toggle(this);"href="#!"/><adata-tochassubtree="true"href="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm"title="gmp_lib Class"tocid="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f">gmp_lib Class</a></div><divclass="toclevel1"data-toclevel="1"data-childrenloaded="true"><aclass="tocExpanded"onclick="javascript: Toggle(this);"href="#!"/><adata-tochassubtree="true"href="0fa7cbf3-e8f4-6b14-d829-8aa663e77c74.htm"title="gmp_lib Methods"tocid="0fa7cbf3-e8f4-6b14-d829-8aa663e77c74">gmp_lib Methods</a></div><divclass="toclevel2"data-toclevel="2"><adata-tochassubtree="false"href="c9cb6a67-59b8-5c03-f31d-f252441c53f6.htm"title="_mpz_realloc Method "tocid="c9cb6a67-59b8-5c03-f31d-f252441c53f6">_mpz_realloc Method </a></div><divclass="toclevel2"data-toclevel="2"><adata-tochassubtree="false"href="2c68671c-cd5c-e2ec-52a2-65b0ca31c3d1.htm"title="allocate Method "tocid="2c68671c-cd5c-e2ec-52a2-65b0ca31c3d1">allocate Method </a></div><divclass="toclevel2"data-toclevel="2"><aclass="tocCollapsed"onclick="javascript: Toggle(this);"href="#!"/><adata-tochassubtree="true"href="92160da3-b1af-e005-cb05-e3fb4dd524d8.htm"title="free Method "tocid="92160da3-b1af-e005-cb05-e3fb4dd524d8">free Met
If <spanclass="parameter">cnd</span> is non-zero, swaps the contents of the areas {<spanclass="parameter">ap</span>, <spanclass="parameter">n</span>} and {<spanclass="parameter">bp</span>, <spanclass="parameter">n</span>}. Otherwise, the areas are left unmodified.
</pre></div></div></div><scripttype="text/javascript">AddLanguageTabSet("ID0EDCA");</script><h4class="subHeading">Parameters</h4><dl><dt><spanclass="parameter">cnd</span></dt><dd>Type:<ahref="bf1f694d-f9b2-6413-12e5-ebae603d5b49.htm">Math.Gmp.Native<spanid="LSTE0CEDFDB_1"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LSTE0CEDFDB_1?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_limb_t</a><br/>Conditonal value: non-zero for true, zero for false.</dd><dt><spanclass="parameter">ap</span></dt><dd>Type:<ahref="4609ac5e-5cf9-cd20-2fa9-8040101c165c.htm">Math.Gmp.Native<spanid="LSTE0CEDFDB_2"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LSTE0CEDFDB_2?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_ptr</a><br/>The first operand integer.</dd><dt><spanclass="parameter">bp</span></dt><dd>Type:<ahref="4609ac5e-5cf9-cd20-2fa9-8040101c165c.htm">Math.Gmp.Native<spanid="LSTE0CEDFDB_3"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LSTE0CEDFDB_3?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_ptr</a><br/>The second operand integer.</dd><dt><spanclass="parameter">n</span></dt><dd>Type:<ahref="4b58a584-7a0e-b600-18fa-ebd493861eb3.htm">Math.Gmp.Native<spanid="LSTE0CEDFDB_4"></span><scripttype="text/javascript">AddLanguageSpecificTextSet("LSTE0CEDFDB_4?cs=.|vb=.|cpp=::|nu=.|fs=.");</script>mp_size_t</a><br/>The number of limbs of <spanclass="parameter">ap</span> and <spanclass="parameter">bp</span>.</dd></dl></div><divclass="collapsibleAreaRegion"><spanclass="collapsibleRegionTitle"onclick="SectionExpandCollapse('ID2RB')"onkeypress="SectionExpandCollapse_CheckKey('ID2RB', event)"tabindex="0"><imgid="ID2RBToggle"class="collapseToggle"src="../icons/SectionExpanded.png"/>Remarks</span></div><divid="ID2RBSection"class="collapsibleSection"><p>
Implemented using logical operations on the limbs, with the same memory accesses independent of the value of <spanclass="parameter">cnd</span>.
gmp_lib.free(ap, bp, a1p, b1p)</pre></div><divid="ID0EDAABA_code_Div3"class="codeSnippetContainerCode"style="display: none"><p>No code example is currently available or this language may not be supported.</p></div><divid="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><scripttype="text/javascript">AddLanguageTabSet("ID0EDAABA");</script></div><divclass="collapsibleAreaRegion"id="seeAlsoSection"><spanclass="collapsibleRegionTitle"onclick="SectionExpandCollapse('ID4RB')"onkeypress="SectionExpandCollapse_CheckKey('ID4RB', event)"tabindex="0"><imgid="ID4RBToggle"class="collapseToggle"src="../icons/SectionExpanded.png"/>See Also</span></div><divid="ID4RBSection"class="collapsibleSection"><h4class="subHeading">Reference</h4><divclass="seeAlsoStyle"><ahref="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm">gmp_lib Class</a></div><divclass="seeAlsoStyle"><ahref="d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm">Math.Gmp.Native Namespace</a></div><divclass="seeAlsoStyle"><ahref="27902901-3a7d-b5b3-d3fc-3900f754bff1.htm">mpn_cnd_add_n</a></div><divclass="seeAlsoStyle"><ahref="b82bad6a-f8f0-db53-a6d3-ed6002046257.htm">mpn_cnd_sub_n</a></div><divclass="seeAlsoStyle"><ahref="1555cd52-98d2-6253-214a-d342a539bfb5.htm">mpn_sec_add_1</a></div><divclass="seeAlsoStyle"><ahref="9137a632-abd2-7963-1991-85e6d753bf13.htm">mpn_sec_sub_1</a></div><divclass="seeAlsoStyle"><ahref="028e92d4-3699-77ff-e8da-9ff4c367f5b3.htm">mpn_sec_mul</a></div><divclass="seeAlsoStyle"><ahref="bfe1e9b5-6fc1-95f2-d5b6-137fe87c071a.htm">mpn_sec_sqr</a></div><divclass="seeAlsoStyle"><ahref="a38b87c5-c6ac-fa68-6d58-c45793bf933e.htm">mpn_sec_powm</a></div><divclass="seeAlsoStyle"><ahref="3588cf60-567a-6182-20e8-5e2836498f49.htm">mpn_sec_tabselect</a></div><divclass="seeAlsoStyle"><ahref="6f1dca2b-39f4-3acd-71fb-4f1e5a0d04e6.htm">mpn_sec_div_qr</a></div><divclass="seeAlsoStyle"><ahref="094ea390-8cc8-bac7-35c3-3616775736de.htm">mpn_sec_div_r</a></div><divclass="seeAlsoStyle"><ahref="62ffb793-b32f-e0dc-a399-f20fe708a803.htm">mpn_sec_invert</a></div><divclass="seeAlsoStyle"><ahref="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm"><ahref="/Math.Gmp.Native/html/3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm#Low_level_functions_for_cryptography">Low-level functions for cryptography</a></a></div><divclass="seeAlsoStyle"><ahref="3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm"><ahref="https://gmplib.org/manual/Low_002dlevel-Functions.html#Low_002dlevel-Functions">GNU MP - Low-level Functions</a></a></div></div></div></div><divid="pageFooter"class="pageFooter"></div></body></html>
