📄 nl_langinfo.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2003 The Open Group, All Rights Reserved --><title>nl_langinfo</title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../jscript/codes.js"></script><basefont size="3"> <a name="nl_langinfo"></a> <a name="tag_03_407"></a><!-- nl_langinfo --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_03_407_01"></a>NAME</h4><blockquote>nl_langinfo - language information</blockquote><h4><a name="tag_03_407_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><div class="box"><code><tt><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../images/opt-start.gif" alt="[Option Start]" border="0"> #include <<a href="../basedefs/langinfo.h.html">langinfo.h</a>><br><br> char *nl_langinfo(nl_item</tt> <i>item</i><tt>); <img src="../images/opt-end.gif" alt="[Option End]" border="0"></tt></code></div><tt><br></tt></blockquote><h4><a name="tag_03_407_03"></a>DESCRIPTION</h4><blockquote><p>The <i>nl_langinfo</i>() function shall return a pointer to a string containing information relevant to the particular languageor cultural area defined in the program's locale (see <a href="../basedefs/langinfo.h.html"><i><langinfo.h></i></a>). Themanifest constant names and values of <i>item</i> are defined in <a href="../basedefs/langinfo.h.html"><i><langinfo.h></i></a>. For example:</p><pre><tt>nl_langinfo(ABDAY_1)</tt></pre><p>would return a pointer to the string <tt>"Dom"</tt> if the identified language was Portuguese, and <tt>"Sun"</tt> if theidentified language was English.</p><p>Calls to <a href="../functions/setlocale.html"><i>setlocale</i>()</a> with a category corresponding to the category of<i>item</i> (see <a href="../basedefs/langinfo.h.html"><i><langinfo.h></i></a>), or to the category <i>LC_ALL ,</i> mayoverwrite the array pointed to by the return value.</p><p>The <i>nl_langinfo</i>() function need not be reentrant. A function that is not required to be reentrant is not required to bethread-safe.</p></blockquote><h4><a name="tag_03_407_04"></a>RETURN VALUE</h4><blockquote><p>In a locale where <i>langinfo</i> data is not defined, <i>nl_langinfo</i>() shall return a pointer to the corresponding stringin the POSIX locale. In all locales, <i>nl_langinfo</i>() shall return a pointer to an empty string if <i>item</i> contains aninvalid setting.</p><p>This pointer may point to static data that may be overwritten on the next call.</p></blockquote><h4><a name="tag_03_407_05"></a>ERRORS</h4><blockquote><p>No errors are defined.</p></blockquote><hr><div class="box"><em>The following sections are informative.</em></div><h4><a name="tag_03_407_06"></a>EXAMPLES</h4><blockquote><h5><a name="tag_03_407_06_01"></a>Getting Date and Time Formatting Information</h5><p>The following example returns a pointer to a string containing date and time formatting information, as defined in the<i>LC_TIME</i> category of the current locale.</p><pre><tt>#include <time.h>#include <langinfo.h>...strftime(datestring, sizeof(datestring), nl_langinfo(D_T_FMT), tm);...</tt></pre></blockquote><h4><a name="tag_03_407_07"></a>APPLICATION USAGE</h4><blockquote><p>The array pointed to by the return value should not be modified by the program, but may be modified by further calls to<i>nl_langinfo</i>().</p></blockquote><h4><a name="tag_03_407_08"></a>RATIONALE</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_407_09"></a>FUTURE DIRECTIONS</h4><blockquote><p>None.</p></blockquote><h4><a name="tag_03_407_10"></a>SEE ALSO</h4><blockquote><p><a href="setlocale.html"><i>setlocale</i>()</a> , the Base Definitions volume of IEEE Std 1003.1-2001, <a href="../basedefs/xbd_chap07.html">Chapter 7, Locale</a>, <a href="../basedefs/langinfo.h.html"><i><langinfo.h></i></a>, <a href="../basedefs/nl_types.h.html"><i><nl_types.h></i></a></p></blockquote><h4><a name="tag_03_407_11"></a>CHANGE HISTORY</h4><blockquote><p>First released in Issue 2.</p></blockquote><h4><a name="tag_03_407_12"></a>Issue 5</h4><blockquote><p>The last paragraph of the DESCRIPTION is moved from the APPLICATION USAGE section.</p><p>A note indicating that this function need not be reentrant is added to the DESCRIPTION.</p></blockquote><div class="box"><em>End of informative text.</em></div><hr><hr size="2" noshade><center><font size="2"><!--footer start-->UNIX ® is a registered Trademark of The Open Group.<br>POSIX ® is a registered Trademark of The IEEE.<br>[ <a href="../mindex.html">Main Index</a> | <a href="../basedefs/contents.html">XBD</a> | <a href="../utilities/contents.html">XCU</a> | <a href="../functions/contents.html">XSH</a> | <a href="../xrat/contents.html">XRAT</a>]</font></center><!--footer end--><hr size="2" noshade></body></html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -