You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
157 lines
7.4 KiB
HTML
157 lines
7.4 KiB
HTML
4 years ago
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<!-- Created by GNU Texinfo 6.4, http://www.gnu.org/software/texinfo/ -->
|
||
|
|
<head>
|
||
|
|
<title>wcstoull (The Red Hat newlib C Library)</title>
|
||
|
|
|
||
|
|
<meta name="description" content="wcstoull (The Red Hat newlib C Library)">
|
||
|
|
<meta name="keywords" content="wcstoull (The Red Hat newlib C Library)">
|
||
|
|
<meta name="resource-type" content="document">
|
||
|
|
<meta name="distribution" content="global">
|
||
|
|
<meta name="Generator" content="makeinfo">
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
|
||
|
|
<link href="index.html#Top" rel="start" title="Top">
|
||
|
|
<link href="Document-Index.html#Document-Index" rel="index" title="Document Index">
|
||
|
|
<link href="Document-Index.html#SEC_Contents" rel="contents" title="Table of Contents">
|
||
|
|
<link href="Stdlib.html#Stdlib" rel="up" title="Stdlib">
|
||
|
|
<link href="system.html#system" rel="next" title="system">
|
||
|
|
<link href="wcstoul.html#wcstoul" rel="prev" title="wcstoul">
|
||
|
|
<style type="text/css">
|
||
|
|
<!--
|
||
|
|
a.summary-letter {text-decoration: none}
|
||
|
|
blockquote.indentedblock {margin-right: 0em}
|
||
|
|
blockquote.smallindentedblock {margin-right: 0em; font-size: smaller}
|
||
|
|
blockquote.smallquotation {font-size: smaller}
|
||
|
|
div.display {margin-left: 3.2em}
|
||
|
|
div.example {margin-left: 3.2em}
|
||
|
|
div.lisp {margin-left: 3.2em}
|
||
|
|
div.smalldisplay {margin-left: 3.2em}
|
||
|
|
div.smallexample {margin-left: 3.2em}
|
||
|
|
div.smalllisp {margin-left: 3.2em}
|
||
|
|
kbd {font-style: oblique}
|
||
|
|
pre.display {font-family: inherit}
|
||
|
|
pre.format {font-family: inherit}
|
||
|
|
pre.menu-comment {font-family: serif}
|
||
|
|
pre.menu-preformatted {font-family: serif}
|
||
|
|
pre.smalldisplay {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smallexample {font-size: smaller}
|
||
|
|
pre.smallformat {font-family: inherit; font-size: smaller}
|
||
|
|
pre.smalllisp {font-size: smaller}
|
||
|
|
span.nolinebreak {white-space: nowrap}
|
||
|
|
span.roman {font-family: initial; font-weight: normal}
|
||
|
|
span.sansserif {font-family: sans-serif; font-weight: normal}
|
||
|
|
ul.no-bullet {list-style: none}
|
||
|
|
-->
|
||
|
|
</style>
|
||
|
|
|
||
|
|
|
||
|
|
</head>
|
||
|
|
|
||
|
|
<body lang="en">
|
||
|
|
<a name="wcstoull"></a>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="system.html#system" accesskey="n" rel="next">system</a>, Previous: <a href="wcstoul.html#wcstoul" accesskey="p" rel="prev">wcstoul</a>, Up: <a href="Stdlib.html#Stdlib" accesskey="u" rel="up">Stdlib</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
<hr>
|
||
|
|
<a name="wcstoull_002c-wcstoull_005fl_002d_002d_002dwide-string-to-unsigned-long-long"></a>
|
||
|
|
<h3 class="section">2.47 <code>wcstoull</code>, <code>wcstoull_l</code>—wide string to unsigned long long</h3>
|
||
|
|
<a name="index-wcstoull"></a>
|
||
|
|
<a name="index-wcstoull_005fl"></a>
|
||
|
|
<a name="index-_005fwcstoull_005fr"></a>
|
||
|
|
<p><strong>Synopsis</strong>
|
||
|
|
</p><div class="example">
|
||
|
|
<pre class="example">#include <wchar.h>
|
||
|
|
unsigned long long wcstoull(const wchar_t *__restrict <var>s</var>,
|
||
|
|
wchar_t **__restrict <var>ptr</var>,
|
||
|
|
int <var>base</var>);
|
||
|
|
|
||
|
|
#include <wchar.h>
|
||
|
|
unsigned long long wcstoull_l(const wchar_t *__restrict <var>s</var>,
|
||
|
|
wchar_t **__restrict <var>ptr</var>,
|
||
|
|
int <var>base</var>,
|
||
|
|
locale_t <var>locale</var>);
|
||
|
|
|
||
|
|
unsigned long long _wcstoull_r(void *<var>reent</var>, const wchar_t *<var>s</var>,
|
||
|
|
wchar_t **<var>ptr</var>, int <var>base</var>);
|
||
|
|
|
||
|
|
</pre></div>
|
||
|
|
<p><strong>Description</strong><br>
|
||
|
|
The function <code>wcstoull</code> converts the wide string <code>*<var>s</var></code> to
|
||
|
|
an <code>unsigned long long</code>. First, it breaks down the string into three parts:
|
||
|
|
leading whitespace, which is ignored; a subject string consisting
|
||
|
|
of the digits meaningful in the radix specified by <var>base</var>
|
||
|
|
(for example, <code>0</code> through <code>7</code> if the value of <var>base</var> is 8);
|
||
|
|
and a trailing portion consisting of one or more unparseable characters,
|
||
|
|
which always includes the terminating null character. Then, it attempts
|
||
|
|
to convert the subject string into an unsigned long long integer, and returns the
|
||
|
|
result.
|
||
|
|
</p>
|
||
|
|
<p>If the value of <var>base</var> is zero, the subject string is expected to look
|
||
|
|
like a normal C integer constant: an optional sign (<code>+</code> or <code>-</code>),
|
||
|
|
a possible <code>0x</code> indicating hexadecimal radix or a possible <0> indicating
|
||
|
|
octal radix, and a number.
|
||
|
|
If <var>base</var> is between 2 and 36, the expected form of the subject is a
|
||
|
|
sequence of digits (which may include letters, depending on the
|
||
|
|
base) representing an integer in the radix specified by <var>base</var>.
|
||
|
|
The letters <code>a</code>–<code>z</code> (or <code>A</code>–<code>Z</code>) are used as digits valued from
|
||
|
|
10 to 35. If <var>base</var> is 16, a leading <code>0x</code> is permitted.
|
||
|
|
</p>
|
||
|
|
<p>The subject sequence is the longest initial sequence of the input
|
||
|
|
string that has the expected form, starting with the first
|
||
|
|
non-whitespace character. If the string is empty or consists entirely
|
||
|
|
of whitespace, or if the first non-whitespace character is not a
|
||
|
|
permissible digit, the subject string is empty.
|
||
|
|
</p>
|
||
|
|
<p>If the subject string is acceptable, and the value of <var>base</var> is zero,
|
||
|
|
<code>wcstoull</code> attempts to determine the radix from the input string. A
|
||
|
|
string with a leading <code>0x</code> is treated as a hexadecimal value; a string with
|
||
|
|
a leading <code>0</code> and no <code>x</code> is treated as octal; all other strings are
|
||
|
|
treated as decimal. If <var>base</var> is between 2 and 36, it is used as the
|
||
|
|
conversion radix, as described above. Finally, a pointer to the first
|
||
|
|
character past the converted subject string is stored in <var>ptr</var>, if
|
||
|
|
<var>ptr</var> is not <code>NULL</code>.
|
||
|
|
</p>
|
||
|
|
<p>If the subject string is empty (that is, if <code>*</code><var>s</var> does not start
|
||
|
|
with a substring in acceptable form), no conversion
|
||
|
|
is performed and the value of <var>s</var> is stored in <var>ptr</var> (if <var>ptr</var> is
|
||
|
|
not <code>NULL</code>).
|
||
|
|
</p>
|
||
|
|
<p>The alternate function <code>_wcstoull_r</code> is a reentrant version. The
|
||
|
|
extra argument <var>reent</var> is a pointer to a reentrancy structure.
|
||
|
|
</p>
|
||
|
|
<p><code>wcstoull_l</code> is like <code>wcstoull</code> but performs the conversion based on the
|
||
|
|
locale specified by the locale object locale. If <var>locale</var> is
|
||
|
|
LC_GLOBAL_LOCALE or not a valid locale object, the behaviour is undefined.
|
||
|
|
</p>
|
||
|
|
<br>
|
||
|
|
<p><strong>Returns</strong><br>
|
||
|
|
<code>wcstoull</code>, <code>wcstoull_l</code> return <code>0</code> and sets <code>errno</code> to <code>EINVAL</code>
|
||
|
|
if the value of <var>base</var> is not supported.
|
||
|
|
</p>
|
||
|
|
<p><code>wcstoull</code>, <code>wcstoull_l</code> return the converted value, if any. If no
|
||
|
|
conversion was made, <code>0</code> is returned.
|
||
|
|
</p>
|
||
|
|
<p><code>wcstoull</code>, <code>wcstoull_l</code> return <code>ULLONG_MAX</code> if the magnitude of
|
||
|
|
the converted value is too large, and sets <code>errno</code> to <code>ERANGE</code>.
|
||
|
|
</p>
|
||
|
|
<br>
|
||
|
|
<p><strong>Portability</strong><br>
|
||
|
|
<code>wcstoull</code> is ANSI.
|
||
|
|
<code>wcstoull_l</code> is a GNU extension.
|
||
|
|
</p>
|
||
|
|
<p><code>wcstoull</code> requires no supporting OS subroutines.
|
||
|
|
</p>
|
||
|
|
<br>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
<div class="header">
|
||
|
|
<p>
|
||
|
|
Next: <a href="system.html#system" accesskey="n" rel="next">system</a>, Previous: <a href="wcstoul.html#wcstoul" accesskey="p" rel="prev">wcstoul</a>, Up: <a href="Stdlib.html#Stdlib" accesskey="u" rel="up">Stdlib</a> [<a href="Document-Index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Document-Index.html#Document-Index" title="Index" rel="index">Index</a>]</p>
|
||
|
|
</div>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|