You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
207 lines
6.2 KiB
207 lines
6.2 KiB
4 years ago
|
<!-- Creator : groff version 1.22.3 -->
|
||
|
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
|
||
|
|
"http://www.w3.org/TR/html4/loose.dtd">
|
||
|
|
<html>
|
||
|
|
<head>
|
||
|
|
<meta name="generator" content="groff -Thtml, see www.gnu.org">
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=US-ASCII">
|
||
|
|
<meta name="Content-Style" content="text/css">
|
||
|
|
<style type="text/css">
|
||
|
|
p { margin-top: 0; margin-bottom: 0; vertical-align: top }
|
||
|
|
pre { margin-top: 0; margin-bottom: 0; vertical-align: top }
|
||
|
|
table { margin-top: 0; margin-bottom: 0; vertical-align: top }
|
||
|
|
h1 { text-align: center }
|
||
|
|
</style>
|
||
|
|
<title>ICONV</title>
|
||
|
|
|
||
|
|
</head>
|
||
|
|
<body>
|
||
|
|
|
||
|
|
<h1 align="center">ICONV</h1>
|
||
|
|
|
||
|
|
<a href="#NAME">NAME</a><br>
|
||
|
|
<a href="#SYNOPSIS">SYNOPSIS</a><br>
|
||
|
|
<a href="#DESCRIPTION">DESCRIPTION</a><br>
|
||
|
|
<a href="#RETURN VALUE">RETURN VALUE</a><br>
|
||
|
|
<a href="#ERRORS">ERRORS</a><br>
|
||
|
|
<a href="#CONFORMING TO">CONFORMING TO</a><br>
|
||
|
|
<a href="#SEE ALSO">SEE ALSO</a><br>
|
||
|
|
|
||
|
|
<hr>
|
||
|
|
|
||
|
|
|
||
|
|
<h2>NAME
|
||
|
|
<a name="NAME"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">iconv −
|
||
|
|
perform character set conversion</p>
|
||
|
|
|
||
|
|
<h2>SYNOPSIS
|
||
|
|
<a name="SYNOPSIS"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em"><b>#include
|
||
|
|
<iconv.h></b></p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em"><b>size_t iconv
|
||
|
|
(iconv_t</b> <i>cd</i><b>, <br>
|
||
|
|
const char* *</b> <i>inbuf</i><b>, size_t *</b>
|
||
|
|
<i>inbytesleft</i><b>, <br>
|
||
|
|
char* *</b> <i>outbuf</i><b>, size_t *</b>
|
||
|
|
<i>outbytesleft</i><b>);</b></p>
|
||
|
|
|
||
|
|
<h2>DESCRIPTION
|
||
|
|
<a name="DESCRIPTION"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">The argument
|
||
|
|
<i>cd</i> must be a conversion descriptor created using the
|
||
|
|
function <b>iconv_open</b>.</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">The main case
|
||
|
|
is when <i>inbuf</i> is not NULL and <i>*inbuf</i> is not
|
||
|
|
NULL. In this case, the <b>iconv</b> function converts the
|
||
|
|
multibyte sequence starting at <i>*inbuf</i> to a multibyte
|
||
|
|
sequence starting at <i>*outbuf</i>. At most
|
||
|
|
<i>*inbytesleft</i> bytes, starting at <i>*inbuf</i>, will
|
||
|
|
be read. At most <i>*outbytesleft</i> bytes, starting at
|
||
|
|
<i>*outbuf</i>, will be written.</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">The
|
||
|
|
<b>iconv</b> function converts one multibyte character at a
|
||
|
|
time, and for each character conversion it increments
|
||
|
|
<i>*inbuf</i> and decrements <i>*inbytesleft</i> by the
|
||
|
|
number of converted input bytes, it increments
|
||
|
|
<i>*outbuf</i> and decrements <i>*outbytesleft</i> by the
|
||
|
|
number of converted output bytes, and it updates the
|
||
|
|
conversion state contained in <i>cd</i>. If the character
|
||
|
|
encoding of the input is stateful, the <b>iconv</b> function
|
||
|
|
can also convert a sequence of input bytes to an update of
|
||
|
|
the conversion state without producing any output bytes;
|
||
|
|
such input is called a <i>shift sequence</i>. The conversion
|
||
|
|
can stop for four reasons:</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">1. An invalid
|
||
|
|
multibyte sequence is encountered in the input. In this case
|
||
|
|
it sets <b>errno</b> to <b>EILSEQ</b> and returns
|
||
|
|
(size_t)(−1). <i>*inbuf</i> is left pointing to the
|
||
|
|
beginning of the invalid multibyte sequence.</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">2. The input
|
||
|
|
byte sequence has been entirely converted, i.e.
|
||
|
|
<i>*inbytesleft</i> has gone down to 0. In this case
|
||
|
|
<b>iconv</b> returns the number of non-reversible
|
||
|
|
conversions performed during this call.</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">3. An
|
||
|
|
incomplete multibyte sequence is encountered in the input,
|
||
|
|
and the input byte sequence terminates after it. In this
|
||
|
|
case it sets <b>errno</b> to <b>EINVAL</b> and returns
|
||
|
|
(size_t)(−1). <i>*inbuf</i> is left pointing to the
|
||
|
|
beginning of the incomplete multibyte sequence.</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">4. The output
|
||
|
|
buffer has no more room for the next converted character. In
|
||
|
|
this case it sets <b>errno</b> to <b>E2BIG</b> and returns
|
||
|
|
(size_t)(−1).</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">A different
|
||
|
|
case is when <i>inbuf</i> is NULL or <i>*inbuf</i> is NULL,
|
||
|
|
but <i>outbuf</i> is not NULL and <i>*outbuf</i> is not
|
||
|
|
NULL. In this case, the <b>iconv</b> function attempts to
|
||
|
|
set <i>cd</i>’s conversion state to the initial state
|
||
|
|
and store a corresponding shift sequence at <i>*outbuf</i>.
|
||
|
|
At most <i>*outbytesleft</i> bytes, starting at
|
||
|
|
<i>*outbuf</i>, will be written. If the output buffer has no
|
||
|
|
more room for this reset sequence, it sets <b>errno</b> to
|
||
|
|
<b>E2BIG</b> and returns (size_t)(−1). Otherwise it
|
||
|
|
increments <i>*outbuf</i> and decrements
|
||
|
|
<i>*outbytesleft</i> by the number of bytes written.</p>
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">A third case is
|
||
|
|
when <i>inbuf</i> is NULL or <i>*inbuf</i> is NULL, and
|
||
|
|
<i>outbuf</i> is NULL or <i>*outbuf</i> is NULL. In this
|
||
|
|
case, the <b>iconv</b> function sets <i>cd</i>’s
|
||
|
|
conversion state to the initial state.</p>
|
||
|
|
|
||
|
|
<h2>RETURN VALUE
|
||
|
|
<a name="RETURN VALUE"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">The
|
||
|
|
<b>iconv</b> function returns the number of characters
|
||
|
|
converted in a non-reversible way during this call;
|
||
|
|
reversible conversions are not counted. In case of error, it
|
||
|
|
sets <b>errno</b> and returns (size_t)(−1).</p>
|
||
|
|
|
||
|
|
<h2>ERRORS
|
||
|
|
<a name="ERRORS"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">The following
|
||
|
|
errors can occur, among others:</p>
|
||
|
|
|
||
|
|
<table width="100%" border="0" rules="none" frame="void"
|
||
|
|
cellspacing="0" cellpadding="0">
|
||
|
|
<tr valign="top" align="left">
|
||
|
|
<td width="11%"></td>
|
||
|
|
<td width="9%">
|
||
|
|
|
||
|
|
|
||
|
|
<p><b>E2BIG</b></p></td>
|
||
|
|
<td width="2%"></td>
|
||
|
|
<td width="78%">
|
||
|
|
|
||
|
|
|
||
|
|
<p>There is not sufficient room at <i>*outbuf</i>.</p></td></tr>
|
||
|
|
<tr valign="top" align="left">
|
||
|
|
<td width="11%"></td>
|
||
|
|
<td width="9%">
|
||
|
|
|
||
|
|
|
||
|
|
<p><b>EILSEQ</b></p></td>
|
||
|
|
<td width="2%"></td>
|
||
|
|
<td width="78%">
|
||
|
|
|
||
|
|
|
||
|
|
<p>An invalid multibyte sequence has been encountered in
|
||
|
|
the input.</p></td></tr>
|
||
|
|
<tr valign="top" align="left">
|
||
|
|
<td width="11%"></td>
|
||
|
|
<td width="9%">
|
||
|
|
|
||
|
|
|
||
|
|
<p><b>EINVAL</b></p></td>
|
||
|
|
<td width="2%"></td>
|
||
|
|
<td width="78%">
|
||
|
|
|
||
|
|
|
||
|
|
<p>An incomplete multibyte sequence has been encountered in
|
||
|
|
the input.</p></td></tr>
|
||
|
|
</table>
|
||
|
|
|
||
|
|
<h2>CONFORMING TO
|
||
|
|
<a name="CONFORMING TO"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em">POSIX:2001</p>
|
||
|
|
|
||
|
|
<h2>SEE ALSO
|
||
|
|
<a name="SEE ALSO"></a>
|
||
|
|
</h2>
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
<p style="margin-left:11%; margin-top: 1em"><b>iconv_open</b>(3),
|
||
|
|
<b>iconvctl</b>(3) <b>iconv_close</b>(3)</p>
|
||
|
|
<hr>
|
||
|
|
</body>
|
||
|
|
</html>
|