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< 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.mpn_set_str Method < / title > < meta name = "Language" content = "en-us" / > < meta name = "System.Keywords" content = "mpn_set_str method" / > < meta name = "System.Keywords" content = "gmp_lib.mpn_set_str method" / > < meta name = "Microsoft.Help.F1" content = "Math.Gmp.Native.gmp_lib.mpn_set_str" / > < meta name = "Microsoft.Help.Id" content = "M:Math.Gmp.Native.gmp_lib.mpn_set_str(Math.Gmp.Native.mp_ptr,Math.Gmp.Native.char_ptr,Math.Gmp.Native.size_t,System.Int32)" / > < meta name = "Description" content = "Convert bytes {, } in the given to limbs at ." / > < meta name = "Microsoft.Help.ContentType" content = "Reference" / > < meta name = "BrandingAware" content = "true" / > < meta name = "container" content = "Math.Gmp.Native" / > < meta name = "file" content = "9a68645a-d8d6-f4c1-f706-0dc217f9809a" / > < meta name = "guid" content = "9a68645a-d8d6-f4c1-f706-0dc217f9809a" / > < 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" 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 = "
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Convert bytes {< span class = "parameter" > str< / span > , < span class = "parameter" > strsize< / span > } in the given < span class = "parameter" > base< / span > to limbs at < span class = "parameter" > rp< / span > .
< / div > < p > < / p >
< strong > Namespace:< / strong >
< a href = "d9c51b9f-0c54-770b-28ea-6eebd8fef368.htm" > Math.Gmp.Native< / a > < br / >
< strong > Assembly:< / strong >
< 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 = "identifier" > mp_size_t< / span > < span class = "identifier" > mpn_set_str< / span > (
< span class = "identifier" > mp_ptr< / span > < span class = "parameter" > rp< / span > ,
< span class = "identifier" > char_ptr< / span > < span class = "parameter" > str< / span > ,
< span class = "identifier" > size_t< / span > < span class = "parameter" > strsize< / span > ,
< span class = "identifier" > int< / span > < span class = "parameter" > base< / 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" > Function< / span > < span class = "identifier" > mpn_set_str< / span > (
< span class = "parameter" > rp< / span > < span class = "keyword" > As< / span > < span class = "identifier" > mp_ptr< / span > ,
< span class = "parameter" > str< / span > < span class = "keyword" > As< / span > < span class = "identifier" > char_ptr< / span > ,
< span class = "parameter" > strsize< / span > < span class = "keyword" > As< / span > < span class = "identifier" > size_t< / span > ,
< span class = "parameter" > base< / span > < span class = "keyword" > As< / span > < span class = "identifier" > Integer< / 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 = "identifier" > mp_size_t< / span > < span class = "identifier" > mpn_set_str< / span > (
< span class = "identifier" > mp_ptr< / span > ^ < span class = "parameter" > rp< / span > ,
< span class = "identifier" > char_ptr< / span > < span class = "parameter" > str< / span > ,
< span class = "identifier" > size_t< / span > < span class = "parameter" > strsize< / span > ,
< span class = "identifier" > int< / span > < span class = "parameter" > base< / 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" > mpn_set_str< / span > :
< span class = "parameter" > rp< / span > : < span class = "identifier" > mp_ptr< / span > *
< span class = "parameter" > str< / span > : < span class = "identifier" > char_ptr< / span > *
< span class = "parameter" > strsize< / span > : < span class = "identifier" > size_t< / span > *
< span class = "parameter" > base< / span > : < span class = "identifier" > int< / span > < span class = "keyword" > -> < / span > < span class = "identifier" > mp_size_t< / span >
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< / pre > < / div > < / div > < / div > < script type = "text/javascript" > AddLanguageTabSet ( "ID0EDCA" ) ; < / script > < h4 class = "subHeading" > Parameters< / h4 > < dl > < dt > < span class = "parameter" > rp< / span > < / dt > < dd > Type: < a href = "4609ac5e-5cf9-cd20-2fa9-8040101c165c.htm" > Math.Gmp.Native< span id = "LSTF9A8C1A6_1" > < / span > < script type = "text/javascript" > AddLanguageSpecificTextSet ( "LSTF9A8C1A6_1?cs=.|vb=.|cpp=::|nu=.|fs=." ) ; < / script > mp_ptr< / a > < br / > The result integer.< / dd > < dt > < span class = "parameter" > str< / span > < / dt > < dd > Type: < a href = "06249483-9daf-95f9-32c7-30195550bbcc.htm" > Math.Gmp.Native< span id = "LSTF9A8C1A6_2" > < / span > < script type = "text/javascript" > AddLanguageSpecificTextSet ( "LSTF9A8C1A6_2?cs=.|vb=.|cpp=::|nu=.|fs=." ) ; < / script > char_ptr< / a > < br / > The operand string.< / dd > < dt > < span class = "parameter" > strsize< / span > < / dt > < dd > Type: < a href = "d9761bfb-1882-59d2-e89b-c6460141f9a6.htm" > Math.Gmp.Native< span id = "LSTF9A8C1A6_3" > < / span > < script type = "text/javascript" > AddLanguageSpecificTextSet ( "LSTF9A8C1A6_3?cs=.|vb=.|cpp=::|nu=.|fs=." ) ; < / script > size_t< / a > < br / > The length of < span class = "parameter" > str< / span > .< / dd > < dt > < span class = "parameter" > base< / span > < / dt > < dd > Type: < a href = "http://msdn2.microsoft.com/en-us/library/td2s409d" target = "_blank" > System< span id = "LSTF9A8C1A6_4" > < / span > < script type = "text/javascript" > AddLanguageSpecificTextSet ( "LSTF9A8C1A6_4?cs=.|vb=.|cpp=::|nu=.|fs=." ) ; < / script > Int32< / a > < br / > < / dd > < / dl > < h4 class = "subHeading" > Return Value< / h4 > Type: < a href = "4b58a584-7a0e-b600-18fa-ebd493861eb3.htm" > mp_size_t< / a > < br / > The number of limbs of < span class = "parameter" > rp< / span > .< / 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 > < span class = "parameter" > str< / span > [0] is the most significant input byte and
< span class = "parameter" > str< / span > [< span class = "parameter" > strsize< / span > - 1] is the least significant input byte.
Each byte should be a value in the range 0 to < span class = "parameter" > base< / span > - 1,
not an ASCII character. base can vary from 2 to 256.
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< / p > < p >
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The converted value is {< span class = "parameter" > rp< / span > , rn} where rn is the return value.
If the most significant input byte < span class = "parameter" > str< / span > [0] is non-zero,
then < span class = "parameter" > rp< / span > [rn - 1] will be non-zero,
else < span class = "parameter" > rp< / span > [rn - 1] and some number of subsequent limbs may be zero.
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< / p > < p >
The area at < span class = "parameter" > rp< / span > has to have space for the largest possible number with
< span class = "parameter" > strsize< / span > digits in the chosen < span class = "parameter" > base< / span > , plus one extra limb.
< / p > < p >
The input must have at least one byte, and no overlap is permitted
between {< span class = "parameter" > str< / span > , < span class = "parameter" > strsize< / span > } and the result at < span class = "parameter" > rp< / span > .
< / 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 multi-precision operands.< / span >
mp_ptr rp = < span class = "highlight-keyword" > new< / span > mp_ptr(< span class = "highlight-keyword" > new< / span > < span class = "highlight-keyword" > uint< / span > [< span class = "highlight-number" > 2< / span > ]);
< span class = "highlight-keyword" > byte< / span > [] s = < span class = "highlight-keyword" > new< / span > < span class = "highlight-keyword" > byte< / span > [] { < span class = "highlight-number" > 1< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 1< / span > };
mp_ptr result = < span class = "highlight-keyword" > new< / span > mp_ptr(< span class = "highlight-keyword" > new< / span > < span class = "highlight-keyword" > uint< / span > [] { < span class = "highlight-number" > 0x00000001< / span > , < span class = "highlight-number" > 0x00000001< / span > });
char_ptr str = < span class = "highlight-keyword" > new< / span > char_ptr(< span class = "highlight-literal" > "xxxxxxxxxxxxxxxxx"< / span > );
Marshal.Copy(s, < span class = "highlight-number" > 0< / span > , str.ToIntPtr(), < span class = "highlight-number" > 9< / span > );
< span class = "highlight-comment" > // Convert rp from str in hex base.< / span >
mp_size_t count = gmp_lib.mpn_set_str(rp, str, < span class = "highlight-number" > 9< / span > , < span class = "highlight-number" > 16< / span > );
< span class = "highlight-comment" > // Assert the non-ASCII, hex representation of s1p.< / span >
Assert.IsTrue(count == rp.Size);
Assert.IsTrue(rp.SequenceEqual(result));
< span class = "highlight-comment" > // Release unmanaged memory.< / span >
gmp_lib.free(rp);
gmp_lib.free(str);< / pre > < / div > < div id = "ID0EDAABA_code_Div2" class = "codeSnippetContainerCode" style = "display: none" > < pre xml:space = "preserve" > < span class = "highlight-comment" > ' Create multi-precision operands.< / span >
< span class = "highlight-keyword" > Dim< / span > rp < span class = "highlight-keyword" > As< / span > < span class = "highlight-keyword" > New< / span > mp_ptr(< span class = "highlight-keyword" > New< / span > < span class = "highlight-keyword" > UInteger< / span > (< span class = "highlight-number" > 1< / span > ) { })
< span class = "highlight-keyword" > Dim< / span > s < span class = "highlight-keyword" > As< / span > < span class = "highlight-keyword" > Byte< / span > () = < span class = "highlight-keyword" > New< / span > < span class = "highlight-keyword" > Byte< / span > () { < span class = "highlight-number" > 1< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 0< / span > , < span class = "highlight-number" > 1< / span > }
< span class = "highlight-keyword" > Dim< / span > result < span class = "highlight-keyword" > As< / span > < span class = "highlight-keyword" > New< / span > mp_ptr(< span class = "highlight-keyword" > New< / span > < span class = "highlight-keyword" > UInteger< / span > () { < span class = "highlight-number" > & H1< / span > , < span class = "highlight-number" > & H1< / span > })
< span class = "highlight-keyword" > Dim< / span > str < span class = "highlight-keyword" > As< / span > < span class = "highlight-keyword" > New< / span > char_ptr(< span class = "highlight-literal" > "xxxxxxxxxxxxxxxxx"< / span > )
Marshal.Copy(s, < span class = "highlight-number" > 0< / span > , str.ToIntPtr(), < span class = "highlight-number" > 9< / span > )
< span class = "highlight-comment" > ' Convert rp from str in hex base.< / span >
< span class = "highlight-keyword" > Dim< / span > count < span class = "highlight-keyword" > As< / span > mp_size_t = gmp_lib.mpn_set_str(rp, str, < span class = "highlight-number" > 9< / span > , < span class = "highlight-number" > 16< / span > )
< span class = "highlight-comment" > ' Assert the non-ASCII, hex representation of s1p.< / span >
Assert.IsTrue(count = rp.Size)
Assert.IsTrue(rp.SequenceEqual(result))
< span class = "highlight-comment" > ' Release unmanaged memory.< / span >
gmp_lib.free(rp)
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gmp_lib.free(str)< / 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 = "1e9cacd7-32b3-7f3b-659a-efdb3e064092.htm" > mpn_get_str< / a > < / div > < div class = "seeAlsoStyle" > < a href = "fb2d29b4-f7e2-e3d6-6fcb-920f2e86c0d7.htm" > mpn_sizeinbase< / a > < / div > < div class = "seeAlsoStyle" > < a href = "3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm" > < a href = "/Math.Gmp.Native/html/3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm#Low_level_Functions" > Low-level Functions< / a > < / a > < / div > < div class = "seeAlsoStyle" > < a href = "3af6b34c-3242-2b75-e7c7-ab79af8a4b0f.htm" > < a href = "https://gmplib.org/manual/Low_002dlevel-Functions.html#Low_002dlevel-Functions" > GNU MP - Low-level Functions< / a > < / a > < / div > < / div > < / div > < / div > < div id = "pageFooter" class = "pageFooter" > < / div > < / body > < / html >
