iconv_open.3

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Author : Bruno Haible
Date : 2023-05-21 00:29:37
Hash : 6549d20c
Message : Implement GB18030 version 2022. * lib/encodings.def (GB18030): Add alias GB18030:2005. (GB18030:2022): New encoding. * lib/gb18030ext.h (gb18030_2005_ext_2uni_pagefe): Renamed from gb18030ext_2uni_pagefe. (gb18030_2022_ext_2uni_pagefe): New array. (gb18030_2005_ext_mbtowc): Renamed from gb18030ext_mbtowc. (gb18030_2022_ext_mbtowc): New function. (gb18030_2005_ext_wctomb): Renamed from gb18030ext_wctomb. (gb18030_2022_ext_wctomb): New function. * lib/gb18030uni.h (gb18030_2022_charset2uni_pua1, gb18030_2022_charset2uni_pua2): New arrays. (gb18030_2005_uni_mbtowc): Renamed from gb18030uni_mbtowc. (gb18030_2022_uni_mbtowc): New function. (gb18030_2022_uni2charset_pua1, gb18030_2022_uni2charset_pua2): New arrays. (gb18030_2005_uni_wctomb): Renamed from gb18030uni_wctomb. (gb18030_2022_uni_wctomb): New function. * lib/gb18030_2005.h: Renamed from lib/gb18030.h. Update comments. (gb18030_2005_mbtowc): Renamed from gb18030_mbtowc. (gb18030_2005_pua2charset): Renamed from gb18030_pua2charset. (gb18030_2005_wctomb): Renamed from gb18030_wctomb. * lib/gb18030_2022.h: New file, based on lib/gb18030_2005.h. * lib/converters.h: Don't include gb18030.h. Include gb18030_2005.h, gb18030_2022.h. * lib/Makefile.in (SOURCE_FILES): Remove gb18030.h. Add gb18030_2005.h, gb18030_2022.h. * tests/GB18030-2005-BMP.TXT: Renamed from tests/GB18030-BMP.TXT. * tests/GB18030-2005.IRREVERSIBLE.TXT: Renamed from tests/GB18030.IRREVERSIBLE.TXT. * tests/GB18030-2022-BMP.TXT: New file. * tests/Makefile.in (check): Test GB18030:2005 instead of GB18030. Also test GB18030:2022. (clean): Don't remove GB18030.TXT. Instead, remove GB18030-2005.TXT and GB18030-2022.TXT. (SOURCE_FILES): Update. Add GB18030-2022-BMP.TXT. * README: Mention the new encoding. * man/iconv_open.3: Likewise. * NEWS: Likewise.

man/iconv_open.3

.\" Copyright (c) Free Software Foundation, Inc.
.\"
.\" This is free documentation; you can redistribute it and/or
.\" modify it under the terms of the GNU General Public License as
.\" published by the Free Software Foundation; either version 3 of
.\" the License, or (at your option) any later version.
.\"
.\" References consulted:
.\"   GNU glibc-2 source code and manual
.\"   OpenGroup's Single Unix specification http://www.UNIX-systems.org/online.html
.\"
.TH ICONV_OPEN 3  "May 20, 2023" "GNU" "Linux Programmer's Manual"
.SH NAME
iconv_open \- allocate descriptor for character set conversion
.SH SYNOPSIS
.nf
.B #include <iconv.h>
.sp
.BI "iconv_t iconv_open (const char* " tocode ", const char* " fromcode );
.fi
.SH DESCRIPTION
The \fBiconv_open\fP function allocates a conversion descriptor suitable
for converting byte sequences from character encoding \fIfromcode\fP to
character encoding \fItocode\fP.
.PP
The values permitted for \fIfromcode\fP and \fItocode\fP and the supported
combinations are system dependent. For the libiconv library, the following
encodings are supported, in all combinations.
.TP
European languages
.nf
.fi
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{850,866,1131},
Mac{Roman,CentralEurope,Iceland,Croatian,Romania},
Mac{Cyrillic,Ukraine,Greek,Turkish},
Macintosh
.TP
Semitic languages
.nf
.fi
ISO\-8859\-{6,8}, CP{1255,1256}, CP862, Mac{Hebrew,Arabic}
.TP
Japanese
.nf
.fi
EUC\-JP, SHIFT_JIS, CP932, ISO\-2022\-JP, ISO\-2022\-JP\-2, ISO\-2022\-JP\-1,
ISO-2022\-JP\-MS
.TP
Chinese
.nf
.fi
EUC\-CN, HZ, GBK, CP936, GB18030, GB18030:2022, EUC\-TW, BIG5, CP950,
BIG5\-HKSCS, BIG5\-HKSCS:2004, BIG5\-HKSCS:2001, BIG5\-HKSCS:1999,
ISO\-2022\-CN, ISO\-2022\-CN\-EXT
.TP
Korean
.nf
.fi
EUC\-KR, CP949, ISO\-2022\-KR, JOHAB
.TP
Armenian
.nf
.fi
ARMSCII\-8
.TP
Georgian
.nf
.fi
Georgian\-Academy, Georgian\-PS
.TP
Tajik
.nf
.fi
KOI8\-T
.TP
Kazakh
.nf
.fi
PT154, RK1048
.TP
Thai
.nf
.fi
TIS\-620, CP874, MacThai
.TP
Laotian
.nf
.fi
MuleLao\-1, CP1133
.TP
Vietnamese
.nf
.fi
VISCII, TCVN, CP1258
.TP
Platform specifics
.nf
.fi
HP\-ROMAN8, NEXTSTEP
.TP
Full Unicode
.nf
.fi
UTF\-8
.nf
.fi
UCS\-2, UCS\-2BE, UCS\-2LE
.nf
.fi
UCS\-4, UCS\-4BE, UCS\-4LE
.nf
.fi
UTF\-16, UTF\-16BE, UTF\-16LE
.nf
.fi
UTF\-32, UTF\-32BE, UTF\-32LE
.nf
.fi
UTF\-7
.nf
.fi
C99, JAVA
.TP
Full Unicode, in terms of \fBuint16_t\fP or \fBuint32_t\fP
(with machine dependent endianness and alignment)
.nf
.fi
UCS\-2\-INTERNAL, UCS\-4\-INTERNAL
.TP
Locale dependent, in terms of \fBchar\fP or \fBwchar_t\fP
(with machine dependent endianness and alignment, and with semantics
depending on the OS and the current LC_CTYPE locale facet)
.nf
.fi
char, wchar_t
.PP
When configured with the option \fB\-\-enable\-extra\-encodings\fP, it also
provides support for a few extra encodings:
.TP
European languages
.nf
CP{437,737,775,852,853,855,857,858,860,861,863,865,869,1125}
.fi
.TP
Semitic languages
.nf
.fi
CP864
.TP
Japanese
.nf
.fi
EUC\-JISX0213, Shift_JISX0213, ISO\-2022\-JP\-3
.TP
Chinese
.nf
.fi
BIG5\-2003 (experimental)
.TP
Turkmen
.nf
.fi
TDS565
.TP
Platform specifics
.nf
.fi
ATARIST, RISCOS\-LATIN1
.PP
.TP
EBCDIC compatible (not ASCII compatible, very rarely used)
.nf
.fi
European languages:
.nf
.fi
    IBM-{037,273,277,278,280,282,284,285,297,423,500,870,871,875,880},
    IBM-{905,924,1025,1026,1047,1112,1122,1123,1140,1141,1142,1143},
    IBM-{1144,1145,1146,1147,1148,1149,1153,1154,1155,1156,1157,1158},
    IBM-{1165,1166,4971}
.nf
.fi
Semitic languages:
.nf
.fi
    IBM-{424,425,12712,16804}
.nf
.fi
Persian:
.nf
.fi
    IBM-1097
.nf
.fi
Thai:
.nf
.fi
    IBM-{838,1160}
.nf
.fi
Laotian:
.nf
.fi
    IBM-1132
.nf
.fi
Vietnamese:
.nf
.fi
    IBM-{1130,1164}
.nf
.fi
Indic languages:
.nf
.fi
    IBM-1137
.PP
The empty encoding name "" is equivalent to "char": it denotes the
locale dependent character encoding.
.PP
When the string "//TRANSLIT" is appended to \fItocode\fP, 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 characters
that look similar to the original character.
.PP
When the string "//IGNORE" is appended to \fItocode\fP, characters that
cannot be represented in the target character set will be silently discarded.
.PP
The resulting conversion descriptor can be used with \fBiconv\fP any number
of times. It remains valid until deallocated using \fBiconv_close\fP.
.PP
A conversion descriptor contains a conversion state. After creation using
\fBiconv_open\fP, the state is in the initial state. Using \fBiconv\fP
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 \fBiconv\fP with NULL as \fIinbuf\fP
argument.
.SH "RETURN VALUE"
The \fBiconv_open\fP function returns a freshly allocated conversion
descriptor. In case of error, it sets \fBerrno\fP and returns (iconv_t)(\-1).
.SH ERRORS
The following error can occur, among others:
.TP
.B EINVAL
The conversion from \fIfromcode\fP to \fItocode\fP is not supported by the
implementation.
.SH "CONFORMING TO"
POSIX:2001
.SH "SEE ALSO"
.BR iconv (3)
.BR iconvctl (3)
.BR iconv_close (3)

thodg/libiconv/man/iconv_open.3

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thodg/libiconv /man/iconv_open.3