/* w32-iconv.c - iconv implementation for Windows.

 * Copyright (C) 2016 g10 Code GmbH

 *

 * This file is part of libgpg-error.

 *

 * libgpg-error is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * libgpg-error is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this program; if not, see <https://www.gnu.org/licenses/>.

 *

 **************************************************************

 * This code code is based on the file win_iconv.c as found

 * at https://github.com/win-iconv/win-iconv with the commit id

 * 8c23784e35327c9d85d22810b9e4a2cbd06ffe90, dated 2016-03-18.

 * Yukihiro Nakadaira <yukihiro.nakadaira@gmail.com> is the

 * original author.  The file win_iconv.c carried this notice:

 *--------------------------------------------------------------

 * iconv implementation using Win32 API to convert.

 *

 * This file is placed in the public domain.

 *---------------------------------------------------

 */

#if HAVE_CONFIG_H

#include <config.h>

#endif

#if !defined (_WIN32) && !defined (__CYGWIN32__)

#  error This module may only be build for Windows or Cygwin32

#endif

/* for WC_NO_BEST_FIT_CHARS */

#ifndef WINVER

# define WINVER 0x0500

#endif

#include <windows.h>

#include <errno.h>

#include <string.h>

#include <stdlib.h>

#include "gpgrt-int.h"

#undef USE_MLANG_DLL

#define MB_CHAR_MAX 16

#define UNICODE_MODE_BOM_DONE   1

#define UNICODE_MODE_SWAPPED    2

#define FLAG_USE_BOM            1

#define FLAG_TRANSLIT           2 /* //TRANSLIT */

#define FLAG_IGNORE             4 /* //IGNORE */

typedef unsigned char uchar;

typedef unsigned short ushort;

typedef unsigned int uint;

typedef struct compat_t compat_t;

typedef struct csconv_t csconv_t;

typedef int* (*f_errno)(void);

typedef int (*f_mbtowc)(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize);

typedef int (*f_wctomb)(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize);

typedef int (*f_mblen)(csconv_t *cv, const uchar *buf, int bufsize);

typedef int (*f_flush)(csconv_t *cv, uchar *buf, int bufsize);

#define COMPAT_IN   1

#define COMPAT_OUT  2

/* unicode mapping for compatibility with other conversion table. */

struct compat_t {

    uint in;

    uint out;

    uint flag;

};

struct csconv_t {

    int codepage;

    int flags;

    f_mbtowc mbtowc;

    f_wctomb wctomb;

    f_mblen mblen;

    f_flush flush;

    DWORD mode;

    compat_t *compat;

};

struct _gpgrt_w32_iconv_s {

    f_errno _errno;

    csconv_t from;

    csconv_t to;

};

#if USE_MLANG_DLL

static int load_mlang(void);

#endif /*USE_MLANG_DLL*/

static int make_csconv(const char *name, csconv_t *cv);

static int name_to_codepage(const char *name);

static uint utf16_to_ucs4(const ushort *wbuf);

static void ucs4_to_utf16(uint wc, ushort *wbuf, int *wbufsize);

static int mbtowc_flags(int codepage);

static int must_use_null_useddefaultchar(int codepage);

static char *strrstr(const char *str, const char *token);

static char *xstrndup(const char *s, size_t n);

static int seterror(int err);

static int sbcs_mblen(csconv_t *cv, const uchar *buf, int bufsize);

static int dbcs_mblen(csconv_t *cv, const uchar *buf, int bufsize);

static int mbcs_mblen(csconv_t *cv, const uchar *buf, int bufsize);

static int utf8_mblen(csconv_t *cv, const uchar *buf, int bufsize);

#if USE_MLANG_DLL

static int eucjp_mblen(csconv_t *cv, const uchar *buf, int bufsize);

#endif /*USE_MLANG_DLL*/

static int kernel_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize);

static int kernel_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize);

#if USE_MLANG_DLL

static int mlang_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize);

static int mlang_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize);

#endif /*USE_MLANG_DLL*/

static int utf16_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize);

static int utf16_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize);

static int utf32_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize);

static int utf32_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize);

#if USE_MLANG_DLL

static int iso2022jp_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize);

static int iso2022jp_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize);

static int iso2022jp_flush(csconv_t *cv, uchar *buf, int bufsize);

#endif /*USE_MLANG_DLL*/

static struct {

    int codepage;

    const char *name;

} codepage_alias[] = {

    {65001, "CP65001"},

    {65001, "UTF8"},

    {65001, "UTF-8"},

    {1200, "CP1200"},

    {1200, "UTF16LE"},

    {1200, "UTF-16LE"},

    {1200, "UCS2LE"},

    {1200, "UCS-2LE"},

    {1200, "UCS-2-INTERNAL"},

    {1201, "CP1201"},

    {1201, "UTF16BE"},

    {1201, "UTF-16BE"},

    {1201, "UCS2BE"},

    {1201, "UCS-2BE"},

    {1201, "unicodeFFFE"},

    {12000, "CP12000"},

    {12000, "UTF32LE"},

    {12000, "UTF-32LE"},

    {12000, "UCS4LE"},

    {12000, "UCS-4LE"},

    {12001, "CP12001"},

    {12001, "UTF32BE"},

    {12001, "UTF-32BE"},

    {12001, "UCS4BE"},

    {12001, "UCS-4BE"},

    /*

     * Default is big endian.

     * See rfc2781 4.3 Interpreting text labelled as UTF-16.

     */

    {1201, "UTF16"},

    {1201, "UTF-16"},

    {1201, "UCS2"},

    {1201, "UCS-2"},

    {12001, "UTF32"},

    {12001, "UTF-32"},

    {12001, "UCS-4"},

    {12001, "UCS4"},

    /* copy from libiconv `iconv -l` */

    /* !IsValidCodePage(367) */

    {20127, "ANSI_X3.4-1968"},

    {20127, "ANSI_X3.4-1986"},

    {20127, "ASCII"},

    {20127, "CP367"},

    {20127, "IBM367"},

    {20127, "ISO-IR-6"},

    {20127, "ISO646-US"},

    {20127, "ISO_646.IRV:1991"},

    {20127, "US"},

    {20127, "US-ASCII"},

    {20127, "CSASCII"},

    /* !IsValidCodePage(819) */

    {1252, "CP819"},

    {1252, "IBM819"},

    {28591, "ISO-8859-1"},

    {28591, "ISO-IR-100"},

    {28591, "ISO8859-1"},

    {28591, "ISO_8859-1"},

    {28591, "ISO_8859-1:1987"},

    {28591, "L1"},

    {28591, "LATIN1"},

    {28591, "CSISOLATIN1"},

    {1250, "CP1250"},

    {1250, "MS-EE"},

    {1250, "WINDOWS-1250"},

    {1251, "CP1251"},

    {1251, "MS-CYRL"},

    {1251, "WINDOWS-1251"},

    {1252, "CP1252"},

    {1252, "MS-ANSI"},

    {1252, "WINDOWS-1252"},

    {1253, "CP1253"},

    {1253, "MS-GREEK"},

    {1253, "WINDOWS-1253"},

    {1254, "CP1254"},

    {1254, "MS-TURK"},

    {1254, "WINDOWS-1254"},

    {1255, "CP1255"},

    {1255, "MS-HEBR"},

    {1255, "WINDOWS-1255"},

    {1256, "CP1256"},

    {1256, "MS-ARAB"},

    {1256, "WINDOWS-1256"},

    {1257, "CP1257"},

    {1257, "WINBALTRIM"},

    {1257, "WINDOWS-1257"},

    {1258, "CP1258"},

    {1258, "WINDOWS-1258"},

    {850, "850"},

    {850, "CP850"},

    {850, "IBM850"},

    {850, "CSPC850MULTILINGUAL"},

    /* !IsValidCodePage(862) */

    {862, "862"},

    {862, "CP862"},

    {862, "IBM862"},

    {862, "CSPC862LATINHEBREW"},

    {866, "866"},

    {866, "CP866"},

    {866, "IBM866"},

    {866, "CSIBM866"},

    /* !IsValidCodePage(154) */

    {154, "CP154"},

    {154, "CYRILLIC-ASIAN"},

    {154, "PT154"},

    {154, "PTCP154"},

    {154, "CSPTCP154"},

    /* !IsValidCodePage(1133) */

    {1133, "CP1133"},

    {1133, "IBM-CP1133"},

    {874, "CP874"},

    {874, "WINDOWS-874"},

    /* !IsValidCodePage(51932) */

    {51932, "CP51932"},

    {51932, "MS51932"},

    {51932, "WINDOWS-51932"},

    {51932, "EUC-JP"},

    {932, "CP932"},

    {932, "MS932"},

    {932, "SHIFFT_JIS"},

    {932, "SHIFFT_JIS-MS"},

    {932, "SJIS"},

    {932, "SJIS-MS"},

    {932, "SJIS-OPEN"},

    {932, "SJIS-WIN"},

    {932, "WINDOWS-31J"},

    {932, "WINDOWS-932"},

    {932, "CSWINDOWS31J"},

    {50221, "CP50221"},

    {50221, "ISO-2022-JP"},

    {50221, "ISO-2022-JP-MS"},

    {50221, "ISO2022-JP"},

    {50221, "ISO2022-JP-MS"},

    {50221, "MS50221"},

    {50221, "WINDOWS-50221"},

    {936, "CP936"},

    {936, "GBK"},

    {936, "MS936"},

    {936, "WINDOWS-936"},

    {950, "CP950"},

    {950, "BIG5"},

    {950, "BIG5HKSCS"},

    {950, "BIG5-HKSCS"},

    {949, "CP949"},

    {949, "UHC"},

    {949, "EUC-KR"},

    {1361, "CP1361"},

    {1361, "JOHAB"},

    {437, "437"},

    {437, "CP437"},

    {437, "IBM437"},

    {437, "CSPC8CODEPAGE437"},

    {737, "CP737"},

    {775, "CP775"},

    {775, "IBM775"},

    {775, "CSPC775BALTIC"},

    {852, "852"},

    {852, "CP852"},

    {852, "IBM852"},

    {852, "CSPCP852"},

    /* !IsValidCodePage(853) */

    {853, "CP853"},

    {855, "855"},

    {855, "CP855"},

    {855, "IBM855"},

    {855, "CSIBM855"},

    {857, "857"},

    {857, "CP857"},

    {857, "IBM857"},

    {857, "CSIBM857"},

    /* !IsValidCodePage(858) */

    {858, "CP858"},

    {860, "860"},

    {860, "CP860"},

    {860, "IBM860"},

    {860, "CSIBM860"},

    {861, "861"},

    {861, "CP-IS"},

    {861, "CP861"},

    {861, "IBM861"},

    {861, "CSIBM861"},

    {863, "863"},

    {863, "CP863"},

    {863, "IBM863"},

    {863, "CSIBM863"},

    {864, "CP864"},

    {864, "IBM864"},

    {864, "CSIBM864"},

    {865, "865"},

    {865, "CP865"},

    {865, "IBM865"},

    {865, "CSIBM865"},

    {869, "869"},

    {869, "CP-GR"},

    {869, "CP869"},

    {869, "IBM869"},

    {869, "CSIBM869"},

    /* !IsValidCodePage(1152) */

    {1125, "CP1125"},

    /*

     * Code Page Identifiers

     * https://msdn.microsoft.com/en-us/library/dd317756.aspx

     */

    {37, "IBM037"}, /* IBM EBCDIC US-Canada */

    {437, "IBM437"}, /* OEM United States */

    {500, "IBM500"}, /* IBM EBCDIC International */

    {708, "ASMO-708"}, /* Arabic (ASMO 708) */

    /* 709 		Arabic (ASMO-449+, BCON V4) */

    /* 710 		Arabic - Transparent Arabic */

    {720, "DOS-720"}, /* Arabic (Transparent ASMO); Arabic (DOS) */

    {737, "ibm737"}, /* OEM Greek (formerly 437G); Greek (DOS) */

    {775, "ibm775"}, /* OEM Baltic; Baltic (DOS) */

    {850, "ibm850"}, /* OEM Multilingual Latin 1; Western European (DOS) */

    {852, "ibm852"}, /* OEM Latin 2; Central European (DOS) */

    {855, "IBM855"}, /* OEM Cyrillic (primarily Russian) */

    {857, "ibm857"}, /* OEM Turkish; Turkish (DOS) */

    {858, "IBM00858"}, /* OEM Multilingual Latin 1 + Euro symbol */

    {860, "IBM860"}, /* OEM Portuguese; Portuguese (DOS) */

    {861, "ibm861"}, /* OEM Icelandic; Icelandic (DOS) */

    {862, "DOS-862"}, /* OEM Hebrew; Hebrew (DOS) */

    {863, "IBM863"}, /* OEM French Canadian; French Canadian (DOS) */

    {864, "IBM864"}, /* OEM Arabic; Arabic (864) */

    {865, "IBM865"}, /* OEM Nordic; Nordic (DOS) */

    {866, "cp866"}, /* OEM Russian; Cyrillic (DOS) */

    {869, "ibm869"}, /* OEM Modern Greek; Greek, Modern (DOS) */

    {870, "IBM870"}, /* IBM EBCDIC Multilingual/ROECE (Latin 2); IBM EBCDIC Multilingual Latin 2 */

    {874, "windows-874"}, /* ANSI/OEM Thai (same as 28605, ISO 8859-15); Thai (Windows) */

    {875, "cp875"}, /* IBM EBCDIC Greek Modern */

    {932, "shift_jis"}, /* ANSI/OEM Japanese; Japanese (Shift-JIS) */

    {932, "shift-jis"}, /* alternative name for it */

    {936, "gb2312"}, /* ANSI/OEM Simplified Chinese (PRC, Singapore); Chinese Simplified (GB2312) */

    {949, "ks_c_5601-1987"}, /* ANSI/OEM Korean (Unified Hangul Code) */

    {950, "big5"}, /* ANSI/OEM Traditional Chinese (Taiwan; Hong Kong SAR, PRC); Chinese Traditional (Big5) */

    {950, "big5hkscs"}, /* ANSI/OEM Traditional Chinese (Hong Kong SAR); Chinese Traditional (Big5-HKSCS) */

    {950, "big5-hkscs"}, /* alternative name for it */

    {1026, "IBM1026"}, /* IBM EBCDIC Turkish (Latin 5) */

    {1047, "IBM01047"}, /* IBM EBCDIC Latin 1/Open System */

    {1140, "IBM01140"}, /* IBM EBCDIC US-Canada (037 + Euro symbol); IBM EBCDIC (US-Canada-Euro) */

    {1141, "IBM01141"}, /* IBM EBCDIC Germany (20273 + Euro symbol); IBM EBCDIC (Germany-Euro) */

    {1142, "IBM01142"}, /* IBM EBCDIC Denmark-Norway (20277 + Euro symbol); IBM EBCDIC (Denmark-Norway-Euro) */

    {1143, "IBM01143"}, /* IBM EBCDIC Finland-Sweden (20278 + Euro symbol); IBM EBCDIC (Finland-Sweden-Euro) */

    {1144, "IBM01144"}, /* IBM EBCDIC Italy (20280 + Euro symbol); IBM EBCDIC (Italy-Euro) */

    {1145, "IBM01145"}, /* IBM EBCDIC Latin America-Spain (20284 + Euro symbol); IBM EBCDIC (Spain-Euro) */

    {1146, "IBM01146"}, /* IBM EBCDIC United Kingdom (20285 + Euro symbol); IBM EBCDIC (UK-Euro) */

    {1147, "IBM01147"}, /* IBM EBCDIC France (20297 + Euro symbol); IBM EBCDIC (France-Euro) */

    {1148, "IBM01148"}, /* IBM EBCDIC International (500 + Euro symbol); IBM EBCDIC (International-Euro) */

    {1149, "IBM01149"}, /* IBM EBCDIC Icelandic (20871 + Euro symbol); IBM EBCDIC (Icelandic-Euro) */

    {1250, "windows-1250"}, /* ANSI Central European; Central European (Windows) */

    {1251, "windows-1251"}, /* ANSI Cyrillic; Cyrillic (Windows) */

    {1252, "windows-1252"}, /* ANSI Latin 1; Western European (Windows) */

    {1253, "windows-1253"}, /* ANSI Greek; Greek (Windows) */

    {1254, "windows-1254"}, /* ANSI Turkish; Turkish (Windows) */

    {1255, "windows-1255"}, /* ANSI Hebrew; Hebrew (Windows) */

    {1256, "windows-1256"}, /* ANSI Arabic; Arabic (Windows) */

    {1257, "windows-1257"}, /* ANSI Baltic; Baltic (Windows) */

    {1258, "windows-1258"}, /* ANSI/OEM Vietnamese; Vietnamese (Windows) */

    {1361, "Johab"}, /* Korean (Johab) */

    {10000, "macintosh"}, /* MAC Roman; Western European (Mac) */

    {10001, "x-mac-japanese"}, /* Japanese (Mac) */

    {10002, "x-mac-chinesetrad"}, /* MAC Traditional Chinese (Big5); Chinese Traditional (Mac) */

    {10003, "x-mac-korean"}, /* Korean (Mac) */

    {10004, "x-mac-arabic"}, /* Arabic (Mac) */

    {10005, "x-mac-hebrew"}, /* Hebrew (Mac) */

    {10006, "x-mac-greek"}, /* Greek (Mac) */

    {10007, "x-mac-cyrillic"}, /* Cyrillic (Mac) */

    {10008, "x-mac-chinesesimp"}, /* MAC Simplified Chinese (GB 2312); Chinese Simplified (Mac) */

    {10010, "x-mac-romanian"}, /* Romanian (Mac) */

    {10017, "x-mac-ukrainian"}, /* Ukrainian (Mac) */

    {10021, "x-mac-thai"}, /* Thai (Mac) */

    {10029, "x-mac-ce"}, /* MAC Latin 2; Central European (Mac) */

    {10079, "x-mac-icelandic"}, /* Icelandic (Mac) */

    {10081, "x-mac-turkish"}, /* Turkish (Mac) */

    {10082, "x-mac-croatian"}, /* Croatian (Mac) */

    {20000, "x-Chinese_CNS"}, /* CNS Taiwan; Chinese Traditional (CNS) */

    {20001, "x-cp20001"}, /* TCA Taiwan */

    {20002, "x_Chinese-Eten"}, /* Eten Taiwan; Chinese Traditional (Eten) */

    {20003, "x-cp20003"}, /* IBM5550 Taiwan */

    {20004, "x-cp20004"}, /* TeleText Taiwan */

    {20005, "x-cp20005"}, /* Wang Taiwan */

    {20105, "x-IA5"}, /* IA5 (IRV International Alphabet No. 5, 7-bit); Western European (IA5) */

    {20106, "x-IA5-German"}, /* IA5 German (7-bit) */

    {20107, "x-IA5-Swedish"}, /* IA5 Swedish (7-bit) */

    {20108, "x-IA5-Norwegian"}, /* IA5 Norwegian (7-bit) */

    {20127, "us-ascii"}, /* US-ASCII (7-bit) */

    {20261, "x-cp20261"}, /* T.61 */

    {20269, "x-cp20269"}, /* ISO 6937 Non-Spacing Accent */

    {20273, "IBM273"}, /* IBM EBCDIC Germany */

    {20277, "IBM277"}, /* IBM EBCDIC Denmark-Norway */

    {20278, "IBM278"}, /* IBM EBCDIC Finland-Sweden */

    {20280, "IBM280"}, /* IBM EBCDIC Italy */

    {20284, "IBM284"}, /* IBM EBCDIC Latin America-Spain */

    {20285, "IBM285"}, /* IBM EBCDIC United Kingdom */

    {20290, "IBM290"}, /* IBM EBCDIC Japanese Katakana Extended */

    {20297, "IBM297"}, /* IBM EBCDIC France */

    {20420, "IBM420"}, /* IBM EBCDIC Arabic */

    {20423, "IBM423"}, /* IBM EBCDIC Greek */

    {20424, "IBM424"}, /* IBM EBCDIC Hebrew */

    {20833, "x-EBCDIC-KoreanExtended"}, /* IBM EBCDIC Korean Extended */

    {20838, "IBM-Thai"}, /* IBM EBCDIC Thai */

    {20866, "koi8-r"}, /* Russian (KOI8-R); Cyrillic (KOI8-R) */

    {20871, "IBM871"}, /* IBM EBCDIC Icelandic */

    {20880, "IBM880"}, /* IBM EBCDIC Cyrillic Russian */

    {20905, "IBM905"}, /* IBM EBCDIC Turkish */

    {20924, "IBM00924"}, /* IBM EBCDIC Latin 1/Open System (1047 + Euro symbol) */

    {20932, "EUC-JP"}, /* Japanese (JIS 0208-1990 and 0121-1990) */

    {20936, "x-cp20936"}, /* Simplified Chinese (GB2312); Chinese Simplified (GB2312-80) */

    {20949, "x-cp20949"}, /* Korean Wansung */

    {21025, "cp1025"}, /* IBM EBCDIC Cyrillic Serbian-Bulgarian */

    /* 21027 		(deprecated) */

    {21866, "koi8-u"}, /* Ukrainian (KOI8-U); Cyrillic (KOI8-U) */

    {28591, "iso-8859-1"}, /* ISO 8859-1 Latin 1; Western European (ISO) */

    {28591, "iso8859-1"}, /* ISO 8859-1 Latin 1; Western European (ISO) */

    {28591, "iso_8859-1"},

    {28591, "iso_8859_1"},

    {28592, "iso-8859-2"}, /* ISO 8859-2 Central European; Central European (ISO) */

    {28592, "iso8859-2"}, /* ISO 8859-2 Central European; Central European (ISO) */

    {28592, "iso_8859-2"},

    {28592, "iso_8859_2"},

    {28593, "iso-8859-3"}, /* ISO 8859-3 Latin 3 */

    {28593, "iso8859-3"}, /* ISO 8859-3 Latin 3 */

    {28593, "iso_8859-3"},

    {28593, "iso_8859_3"},

    {28594, "iso-8859-4"}, /* ISO 8859-4 Baltic */

    {28594, "iso8859-4"}, /* ISO 8859-4 Baltic */

    {28594, "iso_8859-4"},

    {28594, "iso_8859_4"},

    {28595, "iso-8859-5"}, /* ISO 8859-5 Cyrillic */

    {28595, "iso8859-5"}, /* ISO 8859-5 Cyrillic */

    {28595, "iso_8859-5"},

    {28595, "iso_8859_5"},

    {28596, "iso-8859-6"}, /* ISO 8859-6 Arabic */

    {28596, "iso8859-6"}, /* ISO 8859-6 Arabic */

    {28596, "iso_8859-6"},

    {28596, "iso_8859_6"},

    {28597, "iso-8859-7"}, /* ISO 8859-7 Greek */

    {28597, "iso8859-7"}, /* ISO 8859-7 Greek */

    {28597, "iso_8859-7"},

    {28597, "iso_8859_7"},

    {28598, "iso-8859-8"}, /* ISO 8859-8 Hebrew; Hebrew (ISO-Visual) */

    {28598, "iso8859-8"}, /* ISO 8859-8 Hebrew; Hebrew (ISO-Visual) */

    {28598, "iso_8859-8"},

    {28598, "iso_8859_8"},

    {28599, "iso-8859-9"}, /* ISO 8859-9 Turkish */

    {28599, "iso8859-9"}, /* ISO 8859-9 Turkish */

    {28599, "iso_8859-9"},

    {28599, "iso_8859_9"},

    {28603, "iso-8859-13"}, /* ISO 8859-13 Estonian */

    {28603, "iso8859-13"}, /* ISO 8859-13 Estonian */

    {28603, "iso_8859-13"},

    {28603, "iso_8859_13"},

    {28605, "iso-8859-15"}, /* ISO 8859-15 Latin 9 */

    {28605, "iso8859-15"}, /* ISO 8859-15 Latin 9 */

    {28605, "iso_8859-15"},

    {28605, "iso_8859_15"},

    {29001, "x-Europa"}, /* Europa 3 */

    {38598, "iso-8859-8-i"}, /* ISO 8859-8 Hebrew; Hebrew (ISO-Logical) */

    {38598, "iso8859-8-i"}, /* ISO 8859-8 Hebrew; Hebrew (ISO-Logical) */

    {38598, "iso_8859-8-i"},

    {38598, "iso_8859_8-i"},

    {50220, "iso-2022-jp"}, /* ISO 2022 Japanese with no halfwidth Katakana; Japanese (JIS) */

    {50221, "csISO2022JP"}, /* ISO 2022 Japanese with halfwidth Katakana; Japanese (JIS-Allow 1 byte Kana) */

    {50222, "iso-2022-jp"}, /* ISO 2022 Japanese JIS X 0201-1989; Japanese (JIS-Allow 1 byte Kana - SO/SI) */

    {50225, "iso-2022-kr"}, /* ISO 2022 Korean */

    {50225, "iso2022-kr"}, /* ISO 2022 Korean */

    {50227, "x-cp50227"}, /* ISO 2022 Simplified Chinese; Chinese Simplified (ISO 2022) */

    /* 50229 		ISO 2022 Traditional Chinese */

    /* 50930 		EBCDIC Japanese (Katakana) Extended */

    /* 50931 		EBCDIC US-Canada and Japanese */

    /* 50933 		EBCDIC Korean Extended and Korean */

    /* 50935 		EBCDIC Simplified Chinese Extended and Simplified Chinese */

    /* 50936 		EBCDIC Simplified Chinese */

    /* 50937 		EBCDIC US-Canada and Traditional Chinese */

    /* 50939 		EBCDIC Japanese (Latin) Extended and Japanese */

    {51932, "euc-jp"}, /* EUC Japanese */

    {51936, "EUC-CN"}, /* EUC Simplified Chinese; Chinese Simplified (EUC) */

    {51949, "euc-kr"}, /* EUC Korean */

    /* 51950 		EUC Traditional Chinese */

    {52936, "hz-gb-2312"}, /* HZ-GB2312 Simplified Chinese; Chinese Simplified (HZ) */

    {54936, "GB18030"}, /* Windows XP and later: GB18030 Simplified Chinese (4 byte); Chinese Simplified (GB18030) */

    {57002, "x-iscii-de"}, /* ISCII Devanagari */

    {57003, "x-iscii-be"}, /* ISCII Bengali */

    {57004, "x-iscii-ta"}, /* ISCII Tamil */

    {57005, "x-iscii-te"}, /* ISCII Telugu */

    {57006, "x-iscii-as"}, /* ISCII Assamese */

    {57007, "x-iscii-or"}, /* ISCII Oriya */

    {57008, "x-iscii-ka"}, /* ISCII Kannada */

    {57009, "x-iscii-ma"}, /* ISCII Malayalam */

    {57010, "x-iscii-gu"}, /* ISCII Gujarati */

    {57011, "x-iscii-pa"}, /* ISCII Punjabi */

    {0, NULL}

};

/*

 * SJIS SHIFTJIS table              CP932 table

 * ---- --------------------------- --------------------------------

 *   5C U+00A5 YEN SIGN             U+005C REVERSE SOLIDUS

 *   7E U+203E OVERLINE             U+007E TILDE

 * 815C U+2014 EM DASH              U+2015 HORIZONTAL BAR

 * 815F U+005C REVERSE SOLIDUS      U+FF3C FULLWIDTH REVERSE SOLIDUS

 * 8160 U+301C WAVE DASH            U+FF5E FULLWIDTH TILDE

 * 8161 U+2016 DOUBLE VERTICAL LINE U+2225 PARALLEL TO

 * 817C U+2212 MINUS SIGN           U+FF0D FULLWIDTH HYPHEN-MINUS

 * 8191 U+00A2 CENT SIGN            U+FFE0 FULLWIDTH CENT SIGN

 * 8192 U+00A3 POUND SIGN           U+FFE1 FULLWIDTH POUND SIGN

 * 81CA U+00AC NOT SIGN             U+FFE2 FULLWIDTH NOT SIGN

 *

 * EUC-JP and ISO-2022-JP should be compatible with CP932.

 *

 * Kernel and MLang have different Unicode mapping table.  Make sure

 * which API is used.

 */

static compat_t cp932_compat[] = {

    {0x00A5, 0x005C, COMPAT_OUT},

    {0x203E, 0x007E, COMPAT_OUT},

    {0x2014, 0x2015, COMPAT_OUT},

    {0x301C, 0xFF5E, COMPAT_OUT},

    {0x2016, 0x2225, COMPAT_OUT},

    {0x2212, 0xFF0D, COMPAT_OUT},

    {0x00A2, 0xFFE0, COMPAT_OUT},

    {0x00A3, 0xFFE1, COMPAT_OUT},

    {0x00AC, 0xFFE2, COMPAT_OUT},

    {0, 0, 0}

};

static compat_t cp20932_compat[] = {

    {0x00A5, 0x005C, COMPAT_OUT},

    {0x203E, 0x007E, COMPAT_OUT},

    {0x2014, 0x2015, COMPAT_OUT},

    {0xFF5E, 0x301C, COMPAT_OUT|COMPAT_IN},

    {0x2225, 0x2016, COMPAT_OUT|COMPAT_IN},

    {0xFF0D, 0x2212, COMPAT_OUT|COMPAT_IN},

    {0xFFE0, 0x00A2, COMPAT_OUT|COMPAT_IN},

    {0xFFE1, 0x00A3, COMPAT_OUT|COMPAT_IN},

    {0xFFE2, 0x00AC, COMPAT_OUT|COMPAT_IN},

    {0, 0, 0}

};

static compat_t *cp51932_compat = cp932_compat;

/* cp20932_compat for kernel.  cp932_compat for mlang. */

static compat_t *cp5022x_compat = cp932_compat;

#if USE_MLANG_DLL

typedef HRESULT (WINAPI *CONVERTINETSTRING)(

    LPDWORD lpdwMode,

    DWORD dwSrcEncoding,

    DWORD dwDstEncoding,

    LPCSTR lpSrcStr,

    LPINT lpnSrcSize,

    LPBYTE lpDstStr,

    LPINT lpnDstSize

);

typedef HRESULT (WINAPI *CONVERTINETMULTIBYTETOUNICODE)(

    LPDWORD lpdwMode,

    DWORD dwSrcEncoding,

    LPCSTR lpSrcStr,

    LPINT lpnMultiCharCount,

    LPWSTR lpDstStr,

    LPINT lpnWideCharCount

);

typedef HRESULT (WINAPI *CONVERTINETUNICODETOMULTIBYTE)(

    LPDWORD lpdwMode,

    DWORD dwEncoding,

    LPCWSTR lpSrcStr,

    LPINT lpnWideCharCount,

    LPSTR lpDstStr,

    LPINT lpnMultiCharCount

);

typedef HRESULT (WINAPI *ISCONVERTINETSTRINGAVAILABLE)(

    DWORD dwSrcEncoding,

    DWORD dwDstEncoding

);

typedef HRESULT (WINAPI *LCIDTORFC1766A)(

    LCID Locale,

    LPSTR pszRfc1766,

    int nChar

);

typedef HRESULT (WINAPI *LCIDTORFC1766W)(

    LCID Locale,

    LPWSTR pszRfc1766,

    int nChar

);

typedef HRESULT (WINAPI *RFC1766TOLCIDA)(

    LCID *pLocale,

    LPSTR pszRfc1766

);

typedef HRESULT (WINAPI *RFC1766TOLCIDW)(

    LCID *pLocale,

    LPWSTR pszRfc1766

);

static CONVERTINETSTRING ConvertINetString;

static CONVERTINETMULTIBYTETOUNICODE ConvertINetMultiByteToUnicode;

static CONVERTINETUNICODETOMULTIBYTE ConvertINetUnicodeToMultiByte;

static ISCONVERTINETSTRINGAVAILABLE IsConvertINetStringAvailable;

static LCIDTORFC1766A LcidToRfc1766A;

static RFC1766TOLCIDA Rfc1766ToLcidA;

#endif /*USE_MLANG_DLL*/

#if USE_MLANG_DLL

static int

load_mlang(void)

{

    HMODULE h;

    if (ConvertINetString != NULL)

        return TRUE;

    h = LoadLibrary(TEXT("mlang.dll"));

    if (!h)

        return FALSE;

    ConvertINetString = (CONVERTINETSTRING)GetProcAddressA(h, "ConvertINetString");

    ConvertINetMultiByteToUnicode = (CONVERTINETMULTIBYTETOUNICODE)GetProcAddressA(h, "ConvertINetMultiByteToUnicode");

    ConvertINetUnicodeToMultiByte = (CONVERTINETUNICODETOMULTIBYTE)GetProcAddressA(h, "ConvertINetUnicodeToMultiByte");

    IsConvertINetStringAvailable = (ISCONVERTINETSTRINGAVAILABLE)GetProcAddressA(h, "IsConvertINetStringAvailable");

    LcidToRfc1766A = (LCIDTORFC1766A)GetProcAddressA(h, "LcidToRfc1766A");

    Rfc1766ToLcidA = (RFC1766TOLCIDA)GetProcAddressA(h, "Rfc1766ToLcidA");

    return TRUE;

}

#endif

static int

win_iconv_open(gpgrt_w32_iconv_t cd, const char *tocode, const char *fromcode)

{

    if (!make_csconv(fromcode, &cd->from) || !make_csconv(tocode, &cd->to))

        return FALSE;

    cd->_errno = _errno;

    return TRUE;

}

static size_t

win_iconv (gpgrt_w32_iconv_t cd,

           const char **inbuf, size_t *inbytesleft,

           char **outbuf, size_t *outbytesleft)

{

    ushort wbuf[MB_CHAR_MAX]; /* enough room for one character */

    int insize;

    int outsize;

    int wsize;

    DWORD frommode;

    DWORD tomode;

    uint wc;

    compat_t *cp;

    int i;

    if (inbuf == NULL || *inbuf == NULL)

    {

        if (outbuf != NULL && *outbuf != NULL && cd->to.flush != NULL)

        {

            tomode = cd->to.mode;

            outsize = cd->to.flush(&cd->to, (uchar *)*outbuf, *outbytesleft);

            if (outsize == -1)

            {

                if ((cd->to.flags & FLAG_IGNORE) && errno != E2BIG)

                {

                    outsize = 0;

                }

                else

                {

                    cd->to.mode = tomode;

                    return (size_t)(-1);

                }

            }

            *outbuf += outsize;

            *outbytesleft -= outsize;

        }

        cd->from.mode = 0;

        cd->to.mode = 0;

        return 0;

    }

    while (*inbytesleft != 0)

    {

        frommode = cd->from.mode;

        tomode = cd->to.mode;

        wsize = MB_CHAR_MAX;

        insize = cd->from.mbtowc(&cd->from, (const uchar *)*inbuf, *inbytesleft, wbuf, &wsize);

        if (insize == -1)

        {

            if (cd->to.flags & FLAG_IGNORE)

            {

                cd->from.mode = frommode;

                insize = 1;

                wsize = 0;

            }

            else

            {

                cd->from.mode = frommode;

                return (size_t)(-1);

            }

        }

        if (wsize == 0)

        {

            *inbuf += insize;

            *inbytesleft -= insize;

            continue;

        }

        if (cd->from.compat != NULL)

        {

            wc = utf16_to_ucs4(wbuf);

            cp = cd->from.compat;

            for (i = 0; cp[i].in != 0; ++i)

            {

                if ((cp[i].flag & COMPAT_IN) && cp[i].out == wc)

                {

                    ucs4_to_utf16(cp[i].in, wbuf, &wsize);

                    break;

                }

            }

        }

        if (cd->to.compat != NULL)

        {

            wc = utf16_to_ucs4(wbuf);

            cp = cd->to.compat;

            for (i = 0; cp[i].in != 0; ++i)

            {

                if ((cp[i].flag & COMPAT_OUT) && cp[i].in == wc)

                {

                    ucs4_to_utf16(cp[i].out, wbuf, &wsize);

                    break;

                }

            }

        }

        outsize = cd->to.wctomb(&cd->to, wbuf, wsize, (uchar *)*outbuf, *outbytesleft);

        if (outsize == -1)

        {

            if ((cd->to.flags & FLAG_IGNORE) && errno != E2BIG)

            {

                cd->to.mode = tomode;

                outsize = 0;

            }

            else

            {

                cd->from.mode = frommode;

                cd->to.mode = tomode;

                return (size_t)(-1);

            }

        }

        *inbuf += insize;

        *outbuf += outsize;

        *inbytesleft -= insize;

        *outbytesleft -= outsize;

    }

    return 0;

}

static int

make_csconv(const char *_name, csconv_t *cv)

{

    CPINFO cpinfo;

    int use_compat = TRUE;

    int flag = 0;

    char *name;

    char *p;

    name = xstrndup(_name, strlen(_name));

    if (name == NULL)

        return FALSE;

    /* check for option "enc_name//opt1//opt2" */

    while ((p = strrstr(name, "//")) != NULL)

    {

        if (_stricmp(p + 2, "nocompat") == 0)

            use_compat = FALSE;

        else if (_stricmp(p + 2, "translit") == 0)

            flag |= FLAG_TRANSLIT;

        else if (_stricmp(p + 2, "ignore") == 0)

            flag |= FLAG_IGNORE;

        *p = 0;

    }

    cv->mode = 0;

    cv->flags = flag;

    cv->mblen = NULL;

    cv->flush = NULL;

    cv->compat = NULL;

    cv->codepage = name_to_codepage(name);

    if (cv->codepage == 1200 || cv->codepage == 1201)

    {

        cv->mbtowc = utf16_mbtowc;

        cv->wctomb = utf16_wctomb;

        if (_stricmp(name, "UTF-16") == 0 || _stricmp(name, "UTF16") == 0 ||

          _stricmp(name, "UCS-2") == 0 || _stricmp(name, "UCS2") == 0 ||

	  _stricmp(name,"UCS-2-INTERNAL") == 0)