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thodg/libiconv/man/iconv_open.3.html
Bruno Haible
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<html> <head> <meta name="generator" content="groff -Thtml, see www.gnu.org"> <meta name="Content-Style" content="text/css"> <title>ICONV_OPEN</title> </head> <body> <h1 align=center>ICONV_OPEN</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> <!-- Creator : groff version 1.17 --> <!-- CreationDate: Wed May 29 16:17:03 2002 --> <a name="NAME"></a> <h2>NAME</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> iconv_open - allocate descriptor for character set conversion</td></table> <a name="SYNOPSIS"></a> <h2>SYNOPSIS</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> <pre><b>#include <iconv.h> iconv_t iconv_open (const char*</b> <i>tocode</i><b>, const char*</b> <i>fromcode</i><b>); </b></pre></td></table> <a name="DESCRIPTION"></a> <h2>DESCRIPTION</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> The <b>iconv_open</b> function allocates a conversion descriptor suitable for converting byte sequences from character encoding <i>fromcode</i> to character encoding <i>tocode</i>.</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> The values permitted for <i>fromcode</i> and <i>tocode</i> and the supported combinations are system dependent. For the libiconv library, the following encodings are supported, in all combinations.</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> European languages</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> ASCII, ISO-8859-{1,2,3,4,5,7,9,10,13,14,15,16}, KOI8-R, KOI8-U, KOI8-RU, CP{1250,1251,1252,1253,1254,1257}, CP{850,866}, Mac{Roman,CentralEurope,Iceland,Croatian,Romania}, Mac{Cyrillic,Ukraine,Greek,Turkish}, Macintosh</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Semitic languages</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> ISO-8859-{6,8}, CP{1255,1256}, CP862, Mac{Hebrew,Arabic}</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Japanese</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> EUC-JP, SHIFT_JIS, CP932, ISO-2022-JP, ISO-2022-JP-2, ISO-2022-JP-1</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Chinese</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> EUC-CN, HZ, GBK, GB18030, EUC-TW, BIG5, CP950, BIG5-HKSCS, ISO-2022-CN, ISO-2022-CN-EXT</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Korean</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> EUC-KR, CP949, ISO-2022-KR, JOHAB</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Armenian</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> ARMSCII-8</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Georgian</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> Georgian-Academy, Georgian-PS</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Tajik</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> KOI8-T</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Thai</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> TIS-620, CP874, MacThai</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Laotian</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> MuleLao-1, CP1133</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Vietnamese</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> VISCII, TCVN, CP1258</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Platform specifics</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> HP-ROMAN8, NEXTSTEP</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Full Unicode</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UTF-8</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UCS-2, UCS-2BE, UCS-2LE</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UCS-4, UCS-4BE, UCS-4LE</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UTF-16, UTF-16BE, UTF-16LE</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UTF-32, UTF-32BE, UTF-32LE</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UTF-7</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> C99, JAVA</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Full Unicode, in terms of <b>uint16_t</b> or <b>uint32_t</b></td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> (with machine dependent endianness and alignment)</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> UCS-2-INTERNAL, UCS-4-INTERNAL</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Locale dependent, in terms of <b>char</b> or <b>wchar_t</b></td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> (with machine dependent endianness and alignment, and with semantics depending on the OS and the current LC_CTYPE locale facet)</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> char, wchar_t</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> When configured with the option <b>--enable-extra-encodings</b>, it also provides support for a few extra encodings:</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> European languages</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> <pre>CP{437,737,775,852,853,855,857,858,860,861,863,865,869,1125} </pre></td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Semitic languages</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> CP864</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Japanese</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> EUC-JISX0213, Shift_JISX0213, ISO-2022-JP-3</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Turkmen</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> TDS565</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> Platform specifics</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> RISCOS-LATIN1</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> The empty encoding name "" is equivalent to "char": it denotes the locale dependent character encoding.</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> When the string "//TRANSLIT" is appended to <i>tocode</i>, transliteration is activated. This means that when a character cannot be represented in the target character set, it can be approximated through one or several similarly looking characters.</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> When the string "//IGNORE" is appended to <i>tocode</i>, characters that cannot be represented in the target character set will be silently discarded.</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> The resulting conversion descriptor can be used with <b>iconv</b> any number of times. It remains valid until deallocated using <b>iconv_close</b>.</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> A conversion descriptor contains a conversion state. After creation using <b>iconv_open</b>, the state is in the initial state. Using <b>iconv</b> modifies the descriptor's conversion state. (This implies that a conversion descriptor can not be used in multiple threads simultaneously.) To bring the state back to the initial state, use <b>iconv</b> with NULL as <i>inbuf</i> argument.</td></table> <a name="RETURN VALUE"></a> <h2>RETURN VALUE</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> The <b>iconv_open</b> function returns a freshly allocated conversion descriptor. In case of error, it sets <b>errno</b> and returns (iconv_t)(-1).</td></table> <a name="ERRORS"></a> <h2>ERRORS</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> The following error can occur, among others:</td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> <b>EINVAL</b></td></table> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="21%"></td><td width="79%"> The conversion from <i>fromcode</i> to <i>tocode</i> is not supported by the implementation.</td></table> <a name="CONFORMING TO"></a> <h2>CONFORMING TO</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> UNIX98</td></table> <a name="SEE ALSO"></a> <h2>SEE ALSO</h2> <table width="100%" border=0 rules="none" frame="void" cols="2" cellspacing="0" cellpadding="0"> <tr valign="top" align="left"> <td width="10%"></td><td width="90%"> <b>iconv</b>(3), <b>iconv_close</b>(3)</td></table> <hr> </body> </html>