Imported Upstream version 2.35.8

1 files changed, 1965 insertions, 0 deletions

diff --git a/glib/win_iconv.c b/glib/win_iconv.c
new file mode 100644
index 0000000..7a55c0a
--- /dev/null
+++ b/glib/win_iconv.c
@@ -0,0 +1,1965 @@
+/*
+ * iconv library implemented with Win32 API.
+ *
+ * This file is placed in the public domain.
+ *
+ * Maintainer: Yukihiro Nakadaira <yukihiro.nakadaira@gmail.com>
+ *
+ * If $WINICONV_LIBICONV_DLL environment variable was defined, win_iconv
+ * loads the specified DLL dynamically and uses it.  If loading the DLL
+ * or iconv_open() failed, falls back to internal conversion.
+ * $WINICONV_LIBICONV_DLL is a comma separated list.  The first loadable
+ * DLL is used.  The specified DLL should have iconv_open(),
+ * iconv_close() and iconv() functions.  Or these functions can be
+ * libiconv_open(), libiconv_close() and libiconv().
+ *
+ * Win32 API does not support strict encoding conversion for some
+ * codepage.  And MLang function drop or replace invalid bytes and does
+ * not return useful error status as iconv.  This implementation cannot
+ * be used for encoding validation purpose.
+ */
+
+/* for WC_NO_BEST_FIT_CHARS */
+#ifndef WINVER
+# define WINVER 0x0500
+#endif
+
+#define STRICT
+#include <windows.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+
+#if 0
+# define MAKE_EXE
+# define MAKE_DLL
+# define USE_LIBICONV_DLL
+#endif
+
+#if !defined(DEFAULT_LIBICONV_DLL)
+# define DEFAULT_LIBICONV_DLL ""
+#endif
+
+#define MB_CHAR_MAX 16
+
+#define UNICODE_MODE_BOM_DONE   1
+#define UNICODE_MODE_SWAPPED    2
+
+#define FLAG_USE_BOM_ENDIAN     1
+#define FLAG_TRANSLIT           2 /* //TRANSLIT */
+#define FLAG_IGNORE             4 /* //IGNORE (not implemented) */
+
+#define return_error(code)  \
+    do {                    \
+        errno = code;       \
+        return -1;          \
+    } while (0)
+
+#define xstrlcpy(dst, src, size)    \
+    do {                            \
+        strncpy(dst, src, size);    \
+        dst[size - 1] = 0;          \
+    } while (0)
+
+#define xstrlcpyn(dst, src, srclen, size) \
+    xstrlcpy(dst, src, xmin((srclen) + 1, size))
+
+#define xmin(a, b) ((a) < (b) ? (a) : (b))
+#define xmax(a, b) ((a) > (b) ? (a) : (b))
+
+#define STATIC_STRLEN(arr) (sizeof(arr) - 1)
+
+typedef unsigned char uchar;
+typedef unsigned short ushort;
+typedef unsigned int uint;
+
+typedef void* iconv_t;
+
+iconv_t iconv_open(const char *tocode, const char *fromcode);
+int iconv_close(iconv_t cd);
+size_t iconv(iconv_t cd, /* const */ char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
+
+/* libiconv interface for vim */
+#if defined(MAKE_DLL)
+int
+iconvctl (iconv_t cd, int request, void* argument)
+{
+    /* not supported */
+    return 0;
+}
+#endif
+
+typedef struct compat_t compat_t;
+typedef struct csconv_t csconv_t;
+typedef struct rec_iconv_t rec_iconv_t;
+
+typedef iconv_t (*f_iconv_open)(const char *tocode, const char *fromcode);
+typedef int (*f_iconv_close)(iconv_t cd);
+typedef size_t (*f_iconv)(iconv_t cd, /* const */ char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
+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 rec_iconv_t {
+    iconv_t cd;
+    f_iconv_close iconv_close;
+    f_iconv iconv;
+    f_errno _errno;
+    csconv_t from;
+    csconv_t to;
+#if defined(USE_LIBICONV_DLL)
+    HMODULE hlibiconv;
+#endif
+};
+
+static int win_iconv_open(rec_iconv_t *cd, const char *tocode, const char *fromcode);
+static int win_iconv_close(iconv_t cd);
+static size_t win_iconv(iconv_t cd, /* const */ char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
+
+static int load_mlang(void);
+static csconv_t make_csconv(const char *name);
+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 is_unicode(int codepage);
+static int mbtowc_flags(int codepage);
+static int must_use_null_useddefaultchar(int codepage);
+static void check_utf_bom(rec_iconv_t *cd, ushort *wbuf, int *wbufsize);
+static char *strrstr(const char *str, const char *token);
+
+#if defined(USE_LIBICONV_DLL)
+static int libiconv_iconv_open(rec_iconv_t *cd, const char *tocode, const char *fromcode);
+static PVOID MyImageDirectoryEntryToData(LPVOID Base, BOOLEAN MappedAsImage, USHORT DirectoryEntry, PULONG Size);
+static HMODULE find_imported_module_by_funcname(HMODULE hModule, const char *funcname);
+
+static HMODULE hwiniconv;
+static HMODULE hlastdll; /* keep dll loaded for efficiency (unnecessary?) */
+#endif
+
+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);
+static int eucjp_mblen(csconv_t *cv, const uchar *buf, int bufsize);
+
+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);
+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);
+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);
+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);
+
+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"},
+
+    {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"},
+
+#ifndef GLIB_COMPILATION
+    /*
+     * Default is big endian.
+     * See rfc2781 4.3 Interpreting text labelled as UTF-16.
+     */
+    {1201, "UTF16"},
+    {1201, "UTF-16"},
+    {12001, "UTF32"},
+    {12001, "UTF-32"},
+    {12001, "UCS-4"},
+    {12001, "UCS4"},
+#else
+    /* Default is little endian, because the platform is */
+    {1200, "UTF16"},
+    {1200, "UTF-16"},
+    {1200, "UCS2"},
+    {1200, "UCS-2"},
+    {12000, "UTF32"},
+    {12000, "UTF-32"},
+    {12000, "UCS4"},
+    {12000, "UCS-4"},
+#endif
+
+    /* 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"},
+
+    {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
+     * http://msdn2.microsoft.com/en-us/library/ms776446.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) */
+    {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) */
+    {28592, "iso-8859-2"}, /* ISO 8859-2 Central European; Central European (ISO) */
+    {28592, "iso8859-2"}, /* ISO 8859-2 Central European; Central European (ISO) */
+    {28593, "iso-8859-3"}, /* ISO 8859-3 Latin 3 */
+    {28593, "iso8859-3"}, /* ISO 8859-3 Latin 3 */
+    {28594, "iso-8859-4"}, /* ISO 8859-4 Baltic */
+    {28594, "iso8859-4"}, /* ISO 8859-4 Baltic */
+    {28595, "iso-8859-5"}, /* ISO 8859-5 Cyrillic */
+    {28595, "iso8859-5"}, /* ISO 8859-5 Cyrillic */
+    {28596, "iso-8859-6"}, /* ISO 8859-6 Arabic */
+    {28596, "iso8859-6"}, /* ISO 8859-6 Arabic */
+    {28597, "iso-8859-7"}, /* ISO 8859-7 Greek */
+    {28597, "iso8859-7"}, /* ISO 8859-7 Greek */
+    {28598, "iso-8859-8"}, /* ISO 8859-8 Hebrew; Hebrew (ISO-Visual) */
+    {28598, "iso8859-8"}, /* ISO 8859-8 Hebrew; Hebrew (ISO-Visual) */
+    {28599, "iso-8859-9"}, /* ISO 8859-9 Turkish */
+    {28599, "iso8859-9"}, /* ISO 8859-9 Turkish */
+    {28603, "iso-8859-13"}, /* ISO 8859-13 Estonian */
+    {28603, "iso8859-13"}, /* ISO 8859-13 Estonian */
+    {28605, "iso-8859-15"}, /* ISO 8859-15 Latin 9 */
+    {28605, "iso8859-15"}, /* ISO 8859-15 Latin 9 */
+    {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) */
+    {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;
+
+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;
+
+static int
+load_mlang(void)
+{
+    HMODULE h = NULL;
+    char mlang_dll[MAX_PATH + 100];
+    int n;
+    if (ConvertINetString != NULL)
+        return TRUE;
+    n = GetSystemDirectory(mlang_dll, MAX_PATH);
+    if (n > 0 && n < MAX_PATH)
+    {
+        if (mlang_dll[n-1] != '\\' &&
+            mlang_dll[n-1] != '/')
+            strcat(mlang_dll, "\\");
+        strcat(mlang_dll, "mlang.dll");
+        h = LoadLibrary(mlang_dll);
+    }
+    if (!h)
+        return FALSE;
+    ConvertINetString = (CONVERTINETSTRING)GetProcAddress(h, "ConvertINetString");
+    ConvertINetMultiByteToUnicode = (CONVERTINETMULTIBYTETOUNICODE)GetProcAddress(h, "ConvertINetMultiByteToUnicode");
+    ConvertINetUnicodeToMultiByte = (CONVERTINETUNICODETOMULTIBYTE)GetProcAddress(h, "ConvertINetUnicodeToMultiByte");
+    IsConvertINetStringAvailable = (ISCONVERTINETSTRINGAVAILABLE)GetProcAddress(h, "IsConvertINetStringAvailable");
+    LcidToRfc1766A = (LCIDTORFC1766A)GetProcAddress(h, "LcidToRfc1766A");
+    Rfc1766ToLcidA = (RFC1766TOLCIDA)GetProcAddress(h, "Rfc1766ToLcidA");
+    return TRUE;
+}
+
+iconv_t
+iconv_open(const char *tocode, const char *fromcode)
+{
+    rec_iconv_t *cd;
+
+    cd = (rec_iconv_t *)calloc(1, sizeof(rec_iconv_t));
+    if (cd == NULL)
+    {
+        errno = ENOMEM;
+        return (iconv_t)(-1);
+    }
+
+#if defined(USE_LIBICONV_DLL)
+    if (libiconv_iconv_open(cd, tocode, fromcode))
+        return (iconv_t)cd;
+#endif
+
+    if (win_iconv_open(cd, tocode, fromcode))
+        return (iconv_t)cd;
+
+    free(cd);
+    errno = EINVAL;
+    return (iconv_t)(-1);
+}
+
+int
+iconv_close(iconv_t _cd)
+{
+    rec_iconv_t *cd = (rec_iconv_t *)_cd;
+    int r = cd->iconv_close(cd->cd);
+    int e = *(cd->_errno());
+#if defined(USE_LIBICONV_DLL)
+    if (cd->hlibiconv != NULL)
+        FreeLibrary(cd->hlibiconv);
+#endif
+    free(cd);
+    errno = e;
+    return r;
+}
+
+size_t
+iconv(iconv_t _cd, /* const */ char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
+{
+    rec_iconv_t *cd = (rec_iconv_t *)_cd;
+    size_t r = cd->iconv(cd->cd, inbuf, inbytesleft, outbuf, outbytesleft);
+    errno = *(cd->_errno());
+    return r;
+}
+
+static int
+win_iconv_open(rec_iconv_t *cd, const char *tocode, const char *fromcode)
+{
+    cd->from = make_csconv(fromcode);
+    cd->to = make_csconv(tocode);
+    if (cd->from.codepage == -1 || cd->to.codepage == -1)
+        return FALSE;
+    cd->iconv_close = win_iconv_close;
+    cd->iconv = win_iconv;
+    cd->_errno = _errno;
+    cd->cd = (iconv_t)cd;
+    return TRUE;
+}
+
+static int
+win_iconv_close(iconv_t cd)
+{
+    return 0;
+}
+
+static size_t
+win_iconv(iconv_t _cd, /* const */ char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft)
+{
+    rec_iconv_t *cd = (rec_iconv_t *)_cd;
+    ushort wbuf[MB_CHAR_MAX]; /* enough room for one character */
+    int insize;
+    int outsize;
+    int wsize;
+    DWORD mode;
+    uint wc;
+    compat_t *cp;
+    int i;
+
+    if (inbuf == NULL || *inbuf == NULL)
+    {
+        if (outbuf != NULL && *outbuf != NULL && cd->to.flush != NULL)
+        {
+            outsize = cd->to.flush(&cd->to, (uchar *)*outbuf, *outbytesleft);
+            if (outsize == -1)
+                return (size_t)(-1);
+            *outbuf += outsize;
+            *outbytesleft -= outsize;
+        }
+        if (is_unicode(cd->from.codepage) && (cd->from.mode & UNICODE_MODE_SWAPPED))
+            cd->from.codepage ^= 1;
+        cd->from.mode = 0;
+        cd->to.mode = 0;
+        return 0;
+    }
+
+    while (*inbytesleft != 0)
+    {
+        mode = cd->from.mode;
+        wsize = MB_CHAR_MAX;
+
+        insize = cd->from.mbtowc(&cd->from, (const uchar *)*inbuf, *inbytesleft, wbuf, &wsize);
+        if (insize == -1)
+            return (size_t)(-1);
+
+        if (is_unicode(cd->from.codepage) && !(cd->from.mode & UNICODE_MODE_BOM_DONE))
+        {
+            check_utf_bom(cd, wbuf, &wsize);
+            cd->from.mode |= UNICODE_MODE_BOM_DONE;
+        }
+
+        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)
+        {
+            cd->from.mode = mode;
+            return (size_t)(-1);
+        }
+
+        *inbuf += insize;
+        *outbuf += outsize;
+        *inbytesleft -= insize;
+        *outbytesleft -= outsize;
+    }
+
+    return 0;
+}
+
+static csconv_t
+make_csconv(const char *_name)
+{
+    CPINFOEX cpinfoex;
+    csconv_t cv;
+    int use_compat = TRUE;
+    int flag = 0;
+    char name[128];
+    char *p;
+
+    xstrlcpy(name, _name, sizeof(name));
+
+    /* 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)
+            cv.flags |= FLAG_USE_BOM_ENDIAN;
+    }
+    else if (cv.codepage == 12000 || cv.codepage == 12001)
+    {
+        cv.mbtowc = utf32_mbtowc;
+        cv.wctomb = utf32_wctomb;
+        if (_stricmp(name, "UTF-32") == 0 ||
+	    _stricmp(name, "UTF32") == 0 ||
+	    _stricmp(name, "UCS-4") == 0 ||
+	    _stricmp(name, "UCS4") == 0)
+            cv.flags |= FLAG_USE_BOM_ENDIAN;
+    }
+    else if (cv.codepage == 65001)
+    {
+        cv.mbtowc = kernel_mbtowc;
+        cv.wctomb = kernel_wctomb;
+        cv.mblen = utf8_mblen;
+    }
+    else if ((cv.codepage == 50220 || cv.codepage == 50221 || cv.codepage == 50222) && load_mlang())
+    {
+        cv.mbtowc = iso2022jp_mbtowc;
+        cv.wctomb = iso2022jp_wctomb;
+        cv.flush = iso2022jp_flush;
+    }
+    else if (cv.codepage == 51932 && load_mlang())
+    {
+        cv.mbtowc = mlang_mbtowc;
+        cv.wctomb = mlang_wctomb;
+        cv.mblen = eucjp_mblen;
+    }
+    else if (IsValidCodePage(cv.codepage)
+	     && GetCPInfoEx(cv.codepage, 0, &cpinfoex) != 0)
+    {
+        cv.mbtowc = kernel_mbtowc;
+        cv.wctomb = kernel_wctomb;
+        if (cpinfoex.MaxCharSize == 1)
+            cv.mblen = sbcs_mblen;
+        else if (cpinfoex.MaxCharSize == 2)
+            cv.mblen = dbcs_mblen;
+	else
+	    cv.mblen = mbcs_mblen;
+    }
+    else
+    {
+        /* not supported */
+        cv.codepage = -1;
+    }
+    if (use_compat)
+    {
+        switch (cv.codepage)
+        {
+        case 932: cv.compat = cp932_compat; break;
+        case 20932: cv.compat = cp20932_compat; break;
+        case 51932: cv.compat = cp51932_compat; break;
+        case 50220: case 50221: case 50222: cv.compat = cp5022x_compat; break;
+        }
+    }
+    return cv;
+}
+
+static int
+name_to_codepage(const char *name)
+{
+    int i;
+
+    if (*name == '\0' ||
+	strcmp(name, "char") == 0)
+        return GetACP();
+    else if (strcmp(name, "wchar_t") == 0)
+        return 1200;
+    else if (_strnicmp(name, "cp", 2) == 0)
+        return atoi(name + 2); /* CP123 */
+    else if ('0' <= name[0] && name[0] <= '9')
+        return atoi(name);     /* 123 */
+    else if (_strnicmp(name, "xx", 2) == 0)
+        return atoi(name + 2); /* XX123 for debug */
+
+    for (i = 0; codepage_alias[i].name != NULL; ++i)
+        if (_stricmp(name, codepage_alias[i].name) == 0)
+            return codepage_alias[i].codepage;
+    return -1;
+}
+
+/*
+ * http://www.faqs.org/rfcs/rfc2781.html
+ */
+static uint
+utf16_to_ucs4(const ushort *wbuf)
+{
+    uint wc = wbuf[0];
+    if (0xD800 <= wbuf[0] && wbuf[0] <= 0xDBFF)
+        wc = ((wbuf[0] & 0x3FF) << 10) + (wbuf[1] & 0x3FF) + 0x10000;
+    return wc;
+}
+
+static void
+ucs4_to_utf16(uint wc, ushort *wbuf, int *wbufsize)
+{
+    if (wc < 0x10000)
+    {
+        wbuf[0] = wc;
+        *wbufsize = 1;
+    }
+    else
+    {
+        wc -= 0x10000;
+        wbuf[0] = 0xD800 | ((wc >> 10) & 0x3FF);
+        wbuf[1] = 0xDC00 | (wc & 0x3FF);
+        *wbufsize = 2;
+    }
+}
+
+static int
+is_unicode(int codepage)
+{
+    return (codepage == 1200 || codepage == 1201 ||
+            codepage == 12000 || codepage == 12001 ||
+            codepage == 65000 || codepage == 65001);
+}
+
+/*
+ * Check if codepage is one of those for which the dwFlags parameter
+ * to MultiByteToWideChar() must be zero. Return zero or
+ * MB_ERR_INVALID_CHARS.  The docs in Platform SDK for for Windows
+ * Server 2003 R2 claims that also codepage 65001 is one of these, but
+ * that doesn't seem to be the case. The MSDN docs for MSVS2008 leave
+ * out 65001 (UTF-8), and that indeed seems to be the case on XP, it
+ * works fine to pass MB_ERR_INVALID_CHARS in dwFlags when converting
+ * from UTF-8.
+ */
+static int
+mbtowc_flags(int codepage)
+{
+    return (codepage == 50220 || codepage == 50221 ||
+	    codepage == 50222 || codepage == 50225 ||
+	    codepage == 50227 || codepage == 50229 ||
+	    codepage == 52936 || codepage == 54936 ||
+	    (codepage >= 57002 && codepage <= 57011) ||
+	    codepage == 65000 || codepage == 42) ? 0 : MB_ERR_INVALID_CHARS;
+}
+
+/*
+ * Check if codepage is one those for which the lpUsedDefaultChar
+ * parameter to WideCharToMultiByte() must be NULL.  The docs in
+ * Platform SDK for for Windows Server 2003 R2 claims that this is the
+ * list below, while the MSDN docs for MSVS2008 claim that it is only
+ * for 65000 (UTF-7) and 65001 (UTF-8). This time the earlier Platform
+ * SDK seems to be correct, at least for XP.
+ */
+static int
+must_use_null_useddefaultchar(int codepage)
+{
+    return (codepage == 65000 || codepage == 65001 ||
+            codepage == 50220 || codepage == 50221 ||
+            codepage == 50222 || codepage == 50225 ||
+            codepage == 50227 || codepage == 50229 ||
+            codepage == 52936 || codepage == 54936 ||
+            (codepage >= 57002 && codepage <= 57011) ||
+            codepage == 42);
+}
+
+static void
+check_utf_bom(rec_iconv_t *cd, ushort *wbuf, int *wbufsize)
+{
+    /* If we have a BOM, trust it, despite what the caller said */
+    if (wbuf[0] == 0xFFFE && (cd->from.flags & FLAG_USE_BOM_ENDIAN))
+    {
+        /* swap endian: 1200 <-> 1201 or 12000 <-> 12001 */
+        cd->from.codepage ^= 1;
+        cd->from.mode |= UNICODE_MODE_SWAPPED;
+        wbuf[0] = 0xFEFF;
+    }
+
+    /*
+     * Remove BOM.
+     * Don't do this if "to" is Unicode,
+     * except if "to" is UTF-8.
+     */
+    if (wbuf[0] == 0xFEFF && (!is_unicode(cd->to.codepage) || cd->to.codepage == 65001))
+        *wbufsize = 0;
+}
+
+static char *
+strrstr(const char *str, const char *token)
+{
+    int len = strlen(token);
+    const char *p = str + strlen(str);
+
+    while (str <= --p)
+        if (p[0] == token[0] && strncmp(p, token, len) == 0)
+            return (char *)p;
+    return NULL;
+}
+
+#if defined(USE_LIBICONV_DLL)
+static int
+libiconv_iconv_open(rec_iconv_t *cd, const char *fromcode, const char *tocode)
+{
+    HMODULE hlibiconv = NULL;
+    HMODULE hmsvcrt = NULL;
+    char dllname[_MAX_PATH];
+    const char *p;
+    const char *e;
+    f_iconv_open _iconv_open;
+
+    /*
+     * always try to load dll, so that we can switch dll in runtime.
+     */
+
+    /* XXX: getenv() can't get variable set by SetEnvironmentVariable() */
+    p = getenv("WINICONV_LIBICONV_DLL");
+    if (p == NULL)
+        p = DEFAULT_LIBICONV_DLL;
+    /* parse comma separated value */
+    for ( ; *p != 0; p = (*e == ',') ? e + 1 : e)
+    {
+        e = strchr(p, ',');
+        if (p == e)
+            continue;
+        else if (e == NULL)
+            e = p + strlen(p);
+        xstrlcpyn(dllname, p, e - p, sizeof(dllname));
+        hlibiconv = LoadLibrary(dllname);
+        if (hlibiconv != NULL)
+        {
+            if (hlibiconv == hwiniconv)
+            {
+                FreeLibrary(hlibiconv);
+                hlibiconv = NULL;
+                continue;
+            }
+            break;
+        }
+    }
+
+    if (hlastdll != NULL)
+    {
+        /* decrement reference count */
+        FreeLibrary(hlastdll);
+        hlastdll = NULL;
+    }
+
+    if (hlibiconv == NULL)
+        goto failed;
+
+    hmsvcrt = find_imported_module_by_funcname(hlibiconv, "_errno");
+    if (hmsvcrt == NULL)
+        goto failed;
+
+    _iconv_open = (f_iconv_open)GetProcAddress(hlibiconv, "libiconv_open");
+    if (_iconv_open == NULL)
+        _iconv_open = (f_iconv_open)GetProcAddress(hlibiconv, "iconv_open");
+    cd->iconv_close = (f_iconv_close)GetProcAddress(hlibiconv, "libiconv_close");
+    if (cd->iconv_close == NULL)
+        cd->iconv_close = (f_iconv_close)GetProcAddress(hlibiconv, "iconv_close");
+    cd->iconv = (f_iconv)GetProcAddress(hlibiconv, "libiconv");
+    if (cd->iconv == NULL)
+        cd->iconv = (f_iconv)GetProcAddress(hlibiconv, "iconv");
+    cd->_errno = (f_errno)GetProcAddress(hmsvcrt, "_errno");
+    if (_iconv_open == NULL || cd->iconv_close == NULL
+            || cd->iconv == NULL || cd->_errno == NULL)
+        goto failed;
+
+    /* increment reference count */
+    hlastdll = LoadLibrary(dllname);
+
+    cd->cd = _iconv_open(tocode, fromcode);
+    if (cd->cd == (iconv_t)(-1))
+        goto failed;
+
+    cd->hlibiconv = hlibiconv;
+    return TRUE;
+
+failed:
+    if (hlibiconv != NULL)
+        FreeLibrary(hlibiconv);
+    /* do not free hmsvcrt which is obtained by GetModuleHandle() */
+    return FALSE;
+}
+
+/*
+ * Reference:
+ * http://forums.belution.com/ja/vc/000/234/78s.shtml
+ * http://nienie.com/~masapico/api_ImageDirectoryEntryToData.html
+ *
+ * The formal way is
+ *   imagehlp.h or dbghelp.h
+ *   imagehlp.lib or dbghelp.lib
+ *   ImageDirectoryEntryToData()
+ */
+#define TO_DOS_HEADER(base) ((PIMAGE_DOS_HEADER)(base))
+#define TO_NT_HEADERS(base) ((PIMAGE_NT_HEADERS)((LPBYTE)(base) + TO_DOS_HEADER(base)->e_lfanew))
+static PVOID
+MyImageDirectoryEntryToData(LPVOID Base, BOOLEAN MappedAsImage, USHORT DirectoryEntry, PULONG Size)
+{
+    /* TODO: MappedAsImage? */
+    PIMAGE_DATA_DIRECTORY p;
+    p = TO_NT_HEADERS(Base)->OptionalHeader.DataDirectory + DirectoryEntry;
+    if (p->VirtualAddress == 0) {
+      *Size = 0;
+      return NULL;
+    }
+    *Size = p->Size;
+    return (PVOID)((LPBYTE)Base + p->VirtualAddress);
+}
+
+static HMODULE
+find_imported_module_by_funcname(HMODULE hModule, const char *funcname)
+{
+    DWORD Base;
+    ULONG Size;
+    PIMAGE_IMPORT_DESCRIPTOR Imp;
+    PIMAGE_THUNK_DATA Name;         /* Import Name Table */
+    PIMAGE_IMPORT_BY_NAME ImpName;
+
+    Base = (DWORD)hModule;
+    Imp = MyImageDirectoryEntryToData(
+            (LPVOID)Base,
+            TRUE,
+            IMAGE_DIRECTORY_ENTRY_IMPORT,
+            &Size);
+    if (Imp == NULL)
+        return NULL;
+    for ( ; Imp->OriginalFirstThunk != 0; ++Imp)
+    {
+        Name = (PIMAGE_THUNK_DATA)(Base + Imp->OriginalFirstThunk);
+        for ( ; Name->u1.Ordinal != 0; ++Name)
+        {
+            if (!IMAGE_SNAP_BY_ORDINAL(Name->u1.Ordinal))
+            {
+                ImpName = (PIMAGE_IMPORT_BY_NAME)
+                    (Base + (DWORD)Name->u1.AddressOfData);
+                if (strcmp((char *)ImpName->Name, funcname) == 0)
+                    return GetModuleHandle((char *)(Base + Imp->Name));
+            }
+        }
+    }
+    return NULL;
+}
+#endif
+
+static int
+sbcs_mblen(csconv_t *cv, const uchar *buf, int bufsize)
+{
+    return 1;
+}
+
+static int
+dbcs_mblen(csconv_t *cv, const uchar *buf, int bufsize)
+{
+    int len = IsDBCSLeadByteEx(cv->codepage, buf[0]) ? 2 : 1;
+    if (bufsize < len)
+        return_error(EINVAL);
+    return len;
+}
+
+static int
+mbcs_mblen(csconv_t *cv, const uchar *buf, int bufsize)
+{
+    int len = 0;
+
+    if (cv->codepage == 54936) {
+	if (buf[0] <= 0x7F) len = 1;
+	else if (buf[0] >= 0x81 && buf[0] <= 0xFE &&
+		 bufsize >= 2 &&
+		 ((buf[1] >= 0x40 && buf[1] <= 0x7E) ||
+		  (buf[1] >= 0x80 && buf[1] <= 0xFE))) len = 2;
+	else if (buf[0] >= 0x81 && buf[0] <= 0xFE &&
+		 bufsize >= 4 &&
+		 buf[1] >= 0x30 && buf[1] <= 0x39) len = 4;
+	else
+	    return_error(EINVAL);
+	return len;
+    }
+    else
+	return_error(EINVAL);
+}
+
+static int
+utf8_mblen(csconv_t *cv, const uchar *buf, int bufsize)
+{
+    int len = 0;
+
+    if (buf[0] < 0x80) len = 1;
+    else if ((buf[0] & 0xE0) == 0xC0) len = 2;
+    else if ((buf[0] & 0xF0) == 0xE0) len = 3;
+    else if ((buf[0] & 0xF8) == 0xF0) len = 4;
+    else if ((buf[0] & 0xFC) == 0xF8) len = 5;
+    else if ((buf[0] & 0xFE) == 0xFC) len = 6;
+
+    if (len == 0)
+        return_error(EILSEQ);
+    else if (bufsize < len)
+        return_error(EINVAL);
+    return len;
+}
+
+static int
+eucjp_mblen(csconv_t *cv, const uchar *buf, int bufsize)
+{
+    if (buf[0] < 0x80) /* ASCII */
+        return 1;
+    else if (buf[0] == 0x8E) /* JIS X 0201 */
+    {
+        if (bufsize < 2)
+            return_error(EINVAL);
+        else if (!(0xA1 <= buf[1] && buf[1] <= 0xDF))
+            return_error(EILSEQ);
+        return 2;
+    }
+    else if (buf[0] == 0x8F) /* JIS X 0212 */
+    {
+        if (bufsize < 3)
+            return_error(EINVAL);
+        else if (!(0xA1 <= buf[1] && buf[1] <= 0xFE)
+                || !(0xA1 <= buf[2] && buf[2] <= 0xFE))
+            return_error(EILSEQ);
+        return 3;
+    }
+    else /* JIS X 0208 */
+    {
+        if (bufsize < 2)
+            return_error(EINVAL);
+        else if (!(0xA1 <= buf[0] && buf[0] <= 0xFE)
+                || !(0xA1 <= buf[1] && buf[1] <= 0xFE))
+            return_error(EILSEQ);
+        return 2;
+    }
+}
+
+static int
+kernel_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize)
+{
+    int len;
+
+    len = cv->mblen(cv, buf, bufsize);
+    if (len == -1)
+        return -1;
+    /* If converting from ASCII, reject 8bit
+     * chars. MultiByteToWideChar() doesn't. Note that for ASCII we
+     * know that the mblen function is sbcs_mblen() so len is 1.
+     */
+    if (cv->codepage == 20127 && buf[0] >= 0x80)
+        return_error(EILSEQ);
+    *wbufsize = MultiByteToWideChar(cv->codepage, mbtowc_flags (cv->codepage),
+            (const char *)buf, len, (wchar_t *)wbuf, *wbufsize);
+    if (*wbufsize == 0)
+        return_error(EILSEQ);
+    return len;
+}
+
+static int
+kernel_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize)
+{
+    BOOL usedDefaultChar = 0;
+    BOOL *p = NULL;
+    int flags = 0;
+    int len;
+
+    if (bufsize == 0)
+        return_error(E2BIG);
+    if (!must_use_null_useddefaultchar(cv->codepage))
+    {
+        p = &usedDefaultChar;
+#ifdef WC_NO_BEST_FIT_CHARS
+        if (!(cv->flags & FLAG_TRANSLIT))
+            flags |= WC_NO_BEST_FIT_CHARS;
+#endif
+    }
+    len = WideCharToMultiByte(cv->codepage, flags,
+            (const wchar_t *)wbuf, wbufsize, (char *)buf, bufsize, NULL, p);
+    if (len == 0)
+    {
+        if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
+            return_error(E2BIG);
+        return_error(EILSEQ);
+    }
+    else if (usedDefaultChar)
+        return_error(EILSEQ);
+    else if (cv->mblen(cv, buf, len) != len) /* validate result */
+        return_error(EILSEQ);
+    return len;
+}
+
+/*
+ * It seems that the mode (cv->mode) is fixnum.
+ * For example, when converting iso-2022-jp(cp50221) to unicode:
+ *      in ascii sequence: mode=0xC42C0000
+ *   in jisx0208 sequence: mode=0xC42C0001
+ * "C42C" is same for each convert session.
+ * It should be: ((codepage-1)<<16)|state
+ */
+static int
+mlang_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize)
+{
+    int len;
+    int insize;
+    HRESULT hr;
+
+    len = cv->mblen(cv, buf, bufsize);
+    if (len == -1)
+        return -1;
+    insize = len;
+    hr = ConvertINetMultiByteToUnicode(&cv->mode, cv->codepage,
+            (const char *)buf, &insize, (wchar_t *)wbuf, wbufsize);
+    if (hr != S_OK || insize != len)
+        return_error(EILSEQ);
+    return len;
+}
+
+static int
+mlang_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize)
+{
+    char tmpbuf[MB_CHAR_MAX]; /* enough room for one character */
+    int tmpsize = MB_CHAR_MAX;
+    int insize = wbufsize;
+    HRESULT hr;
+
+    hr = ConvertINetUnicodeToMultiByte(&cv->mode, cv->codepage,
+            (const wchar_t *)wbuf, &wbufsize, tmpbuf, &tmpsize);
+    if (hr != S_OK || insize != wbufsize)
+        return_error(EILSEQ);
+    else if (bufsize < tmpsize)
+        return_error(E2BIG);
+    else if (cv->mblen(cv, (uchar *)tmpbuf, tmpsize) != tmpsize)
+        return_error(EILSEQ);
+    memcpy(buf, tmpbuf, tmpsize);
+    return tmpsize;
+}
+
+static int
+utf16_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize)
+{
+    if (bufsize < 2)
+        return_error(EINVAL);
+    if (cv->codepage == 1200) /* little endian */
+        wbuf[0] = (buf[1] << 8) | buf[0];
+    else if (cv->codepage == 1201) /* big endian */
+        wbuf[0] = (buf[0] << 8) | buf[1];
+    if (0xDC00 <= wbuf[0] && wbuf[0] <= 0xDFFF)
+        return_error(EILSEQ);
+    if (0xD800 <= wbuf[0] && wbuf[0] <= 0xDBFF)
+    {
+        if (bufsize < 4)
+            return_error(EINVAL);
+        if (cv->codepage == 1200) /* little endian */
+            wbuf[1] = (buf[3] << 8) | buf[2];
+        else if (cv->codepage == 1201) /* big endian */
+            wbuf[1] = (buf[2] << 8) | buf[3];
+        if (!(0xDC00 <= wbuf[1] && wbuf[1] <= 0xDFFF))
+            return_error(EILSEQ);
+        *wbufsize = 2;
+        return 4;
+    }
+    *wbufsize = 1;
+    return 2;
+}
+
+static int
+utf16_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize)
+{
+    if (bufsize < 2)
+        return_error(E2BIG);
+    if (cv->codepage == 1200) /* little endian */
+    {
+        buf[0] = (wbuf[0] & 0x00FF);
+        buf[1] = (wbuf[0] & 0xFF00) >> 8;
+    }
+    else if (cv->codepage == 1201) /* big endian */
+    {
+        buf[0] = (wbuf[0] & 0xFF00) >> 8;
+        buf[1] = (wbuf[0] & 0x00FF);
+    }
+    if (0xD800 <= wbuf[0] && wbuf[0] <= 0xDBFF)
+    {
+        if (bufsize < 4)
+            return_error(E2BIG);
+        if (cv->codepage == 1200) /* little endian */
+        {
+            buf[2] = (wbuf[1] & 0x00FF);
+            buf[3] = (wbuf[1] & 0xFF00) >> 8;
+        }
+        else if (cv->codepage == 1201) /* big endian */
+        {
+            buf[2] = (wbuf[1] & 0xFF00) >> 8;
+            buf[3] = (wbuf[1] & 0x00FF);
+        }
+        return 4;
+    }
+    return 2;
+}
+
+static int
+utf32_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize)
+{
+    uint wc;
+
+    if (bufsize < 4)
+        return_error(EINVAL);
+    if (cv->codepage == 12000) /* little endian */
+        wc = (buf[3] << 24) | (buf[2] << 16) | (buf[1] << 8) | buf[0];
+    else if (cv->codepage == 12001) /* big endian */
+        wc = (buf[0] << 24) | (buf[1] << 16) | (buf[2] << 8) | buf[3];
+    if ((0xD800 <= wc && wc <= 0xDFFF) || 0x10FFFF < wc)
+        return_error(EILSEQ);
+    ucs4_to_utf16(wc, wbuf, wbufsize);
+    return 4;
+}
+
+static int
+utf32_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize)
+{
+    uint wc;
+
+    if (bufsize < 4)
+        return_error(E2BIG);
+    wc = utf16_to_ucs4(wbuf);
+    if (cv->codepage == 12000) /* little endian */
+    {
+        buf[0] = wc & 0x000000FF;
+        buf[1] = (wc & 0x0000FF00) >> 8;
+        buf[2] = (wc & 0x00FF0000) >> 16;
+        buf[3] = (wc & 0xFF000000) >> 24;
+    }
+    else if (cv->codepage == 12001) /* big endian */
+    {
+        buf[0] = (wc & 0xFF000000) >> 24;
+        buf[1] = (wc & 0x00FF0000) >> 16;
+        buf[2] = (wc & 0x0000FF00) >> 8;
+        buf[3] = wc & 0x000000FF;
+    }
+    return 4;
+}
+
+/*
+ * 50220: ISO 2022 Japanese with no halfwidth Katakana; Japanese (JIS)
+ * 50221: ISO 2022 Japanese with halfwidth Katakana; Japanese (JIS-Allow
+ *        1 byte Kana)
+ * 50222: ISO 2022 Japanese JIS X 0201-1989; Japanese (JIS-Allow 1 byte
+ *        Kana - SO/SI)
+ *
+ * MultiByteToWideChar() and WideCharToMultiByte() behave differently
+ * depending on Windows version.  On XP, WideCharToMultiByte() doesn't
+ * terminate result sequence with ascii escape.  But Vista does.
+ * Use MLang instead.
+ */
+
+#define ISO2022_MODE(cs, shift) (((cs) << 8) | (shift))
+#define ISO2022_MODE_CS(mode) (((mode) >> 8) & 0xFF)
+#define ISO2022_MODE_SHIFT(mode) ((mode) & 0xFF)
+
+#define ISO2022_SI  0
+#define ISO2022_SO  1
+
+/* shift in */
+static const char iso2022_SI_seq[] = "\x0F";
+/* shift out */
+static const char iso2022_SO_seq[] = "\x0E";
+
+typedef struct iso2022_esc_t iso2022_esc_t;
+struct iso2022_esc_t {
+    const char *esc;
+    int esc_len;
+    int len;
+    int cs;
+};
+
+#define ISO2022JP_CS_ASCII            0
+#define ISO2022JP_CS_JISX0201_ROMAN   1
+#define ISO2022JP_CS_JISX0201_KANA    2
+#define ISO2022JP_CS_JISX0208_1978    3
+#define ISO2022JP_CS_JISX0208_1983    4
+#define ISO2022JP_CS_JISX0212         5
+
+static iso2022_esc_t iso2022jp_esc[] = {
+    {"\x1B\x28\x42", 3, 1, ISO2022JP_CS_ASCII},
+    {"\x1B\x28\x4A", 3, 1, ISO2022JP_CS_JISX0201_ROMAN},
+    {"\x1B\x28\x49", 3, 1, ISO2022JP_CS_JISX0201_KANA},
+    {"\x1B\x24\x40", 3, 2, ISO2022JP_CS_JISX0208_1983}, /* unify 1978 with 1983 */
+    {"\x1B\x24\x42", 3, 2, ISO2022JP_CS_JISX0208_1983},
+    {"\x1B\x24\x28\x44", 4, 2, ISO2022JP_CS_JISX0212},
+    {NULL, 0, 0, 0}
+};
+
+static int
+iso2022jp_mbtowc(csconv_t *cv, const uchar *buf, int bufsize, ushort *wbuf, int *wbufsize)
+{
+    iso2022_esc_t *iesc = iso2022jp_esc;
+    char tmp[MB_CHAR_MAX];
+    int insize;
+    HRESULT hr;
+    DWORD dummy = 0;
+    int len;
+    int esc_len;
+    int cs;
+    int shift;
+    int i;
+
+    if (buf[0] == 0x1B)
+    {
+        for (i = 0; iesc[i].esc != NULL; ++i)
+        {
+            esc_len = iesc[i].esc_len;
+            if (bufsize < esc_len)
+            {
+                if (strncmp((char *)buf, iesc[i].esc, bufsize) == 0)
+                    return_error(EINVAL);
+            }
+            else
+            {
+                if (strncmp((char *)buf, iesc[i].esc, esc_len) == 0)
+                {
+                    cv->mode = ISO2022_MODE(iesc[i].cs, ISO2022_SI);
+                    *wbufsize = 0;
+                    return esc_len;
+                }
+            }
+        }
+        /* not supported escape sequence */
+        return_error(EILSEQ);
+    }
+    else if (buf[0] == iso2022_SO_seq[0])
+    {
+        cv->mode = ISO2022_MODE(ISO2022_MODE_CS(cv->mode), ISO2022_SO);
+        *wbufsize = 0;
+        return 1;
+    }
+    else if (buf[0] == iso2022_SI_seq[0])
+    {
+        cv->mode = ISO2022_MODE(ISO2022_MODE_CS(cv->mode), ISO2022_SI);
+        *wbufsize = 0;
+        return 1;
+    }
+
+    cs = ISO2022_MODE_CS(cv->mode);
+    shift = ISO2022_MODE_SHIFT(cv->mode);
+
+    /* reset the mode for informal sequence */
+    if (buf[0] < 0x20)
+    {
+        cs = ISO2022JP_CS_ASCII;
+        shift = ISO2022_SI;
+    }
+
+    len = iesc[cs].len;
+    if (bufsize < len)
+        return_error(EINVAL);
+    for (i = 0; i < len; ++i)
+        if (!(buf[i] < 0x80))
+            return_error(EILSEQ);
+    esc_len = iesc[cs].esc_len;
+    memcpy(tmp, iesc[cs].esc, esc_len);
+    if (shift == ISO2022_SO)
+    {
+        memcpy(tmp + esc_len, iso2022_SO_seq, 1);
+        esc_len += 1;
+    }
+    memcpy(tmp + esc_len, buf, len);
+
+    if ((cv->codepage == 50220 || cv->codepage == 50221
+                || cv->codepage == 50222) && shift == ISO2022_SO)
+    {
+        /* XXX: shift-out cannot be used for mbtowc (both kernel and
+         * mlang) */
+        esc_len = iesc[ISO2022JP_CS_JISX0201_KANA].esc_len;
+        memcpy(tmp, iesc[ISO2022JP_CS_JISX0201_KANA].esc, esc_len);
+        memcpy(tmp + esc_len, buf, len);
+    }
+
+    insize = len + esc_len;
+    hr = ConvertINetMultiByteToUnicode(&dummy, cv->codepage,
+            (const char *)tmp, &insize, (wchar_t *)wbuf, wbufsize);
+    if (hr != S_OK || insize != len + esc_len)
+        return_error(EILSEQ);
+
+    /* Check for conversion error.  Assuming defaultChar is 0x3F. */
+    /* ascii should be converted from ascii */
+    if (wbuf[0] == buf[0]
+            && cv->mode != ISO2022_MODE(ISO2022JP_CS_ASCII, ISO2022_SI))
+        return_error(EILSEQ);
+
+    /* reset the mode for informal sequence */
+    if (cv->mode != ISO2022_MODE(cs, shift))
+        cv->mode = ISO2022_MODE(cs, shift);
+
+    return len;
+}
+
+static int
+iso2022jp_wctomb(csconv_t *cv, ushort *wbuf, int wbufsize, uchar *buf, int bufsize)
+{
+    iso2022_esc_t *iesc = iso2022jp_esc;
+    char tmp[MB_CHAR_MAX];
+    int tmpsize = MB_CHAR_MAX;
+    int insize = wbufsize;
+    HRESULT hr;
+    DWORD dummy = 0;
+    int len;
+    int esc_len;
+    int cs;
+    int shift;
+    int i;
+
+    /*
+     * MultiByte = [escape sequence] + character + [escape sequence]
+     *
+     * Whether trailing escape sequence is added depends on which API is
+     * used (kernel or MLang, and its version).
+     */
+    hr = ConvertINetUnicodeToMultiByte(&dummy, cv->codepage,
+            (const wchar_t *)wbuf, &wbufsize, tmp, &tmpsize);
+    if (hr != S_OK || insize != wbufsize)
+        return_error(EILSEQ);
+    else if (bufsize < tmpsize)
+        return_error(E2BIG);
+
+    if (tmpsize == 1)
+    {
+        cs = ISO2022JP_CS_ASCII;
+        esc_len = 0;
+    }
+    else
+    {
+        for (i = 1; iesc[i].esc != NULL; ++i)
+        {
+            esc_len = iesc[i].esc_len;
+            if (strncmp(tmp, iesc[i].esc, esc_len) == 0)
+            {
+                cs = iesc[i].cs;
+                break;
+            }
+        }
+        if (iesc[i].esc == NULL)
+            /* not supported escape sequence */
+            return_error(EILSEQ);
+    }
+
+    shift = ISO2022_SI;
+    if (tmp[esc_len] == iso2022_SO_seq[0])
+    {
+        shift = ISO2022_SO;
+        esc_len += 1;
+    }
+
+    len = iesc[cs].len;
+
+    /* Check for converting error.  Assuming defaultChar is 0x3F. */
+    /* ascii should be converted from ascii */
+    if (cs == ISO2022JP_CS_ASCII && !(wbuf[0] < 0x80))
+        return_error(EILSEQ);
+    else if (tmpsize < esc_len + len)
+        return_error(EILSEQ);
+
+    if (cv->mode == ISO2022_MODE(cs, shift))
+    {
+        /* remove escape sequence */
+        if (esc_len != 0)
+            memmove(tmp, tmp + esc_len, len);
+        esc_len = 0;
+    }
+    else
+    {
+        if (cs == ISO2022JP_CS_ASCII)
+        {
+            esc_len = iesc[ISO2022JP_CS_ASCII].esc_len;
+            memmove(tmp + esc_len, tmp, len);
+            memcpy(tmp, iesc[ISO2022JP_CS_ASCII].esc, esc_len);
+        }
+        if (ISO2022_MODE_SHIFT(cv->mode) == ISO2022_SO)
+        {
+            /* shift-in before changing to other mode */
+            memmove(tmp + 1, tmp, len + esc_len);
+            memcpy(tmp, iso2022_SI_seq, 1);
+            esc_len += 1;
+        }
+    }
+
+    if (bufsize < len + esc_len)
+        return_error(E2BIG);
+    memcpy(buf, tmp, len + esc_len);
+    cv->mode = ISO2022_MODE(cs, shift);
+    return len + esc_len;
+}
+
+static int
+iso2022jp_flush(csconv_t *cv, uchar *buf, int bufsize)
+{
+    iso2022_esc_t *iesc = iso2022jp_esc;
+    int esc_len;
+
+    if (cv->mode != ISO2022_MODE(ISO2022JP_CS_ASCII, ISO2022_SI))
+    {
+        esc_len = 0;
+        if (ISO2022_MODE_SHIFT(cv->mode) != ISO2022_SI)
+            esc_len += 1;
+        if (ISO2022_MODE_CS(cv->mode) != ISO2022JP_CS_ASCII)
+            esc_len += iesc[ISO2022JP_CS_ASCII].esc_len;
+        if (bufsize < esc_len)
+            return_error(E2BIG);
+
+        esc_len = 0;
+        if (ISO2022_MODE_SHIFT(cv->mode) != ISO2022_SI)
+        {
+            memcpy(buf, iso2022_SI_seq, 1);
+            esc_len += 1;
+        }
+        if (ISO2022_MODE_CS(cv->mode) != ISO2022JP_CS_ASCII)
+        {
+            memcpy(buf + esc_len, iesc[ISO2022JP_CS_ASCII].esc,
+                    iesc[ISO2022JP_CS_ASCII].esc_len);
+            esc_len += iesc[ISO2022JP_CS_ASCII].esc_len;
+        }
+        return esc_len;
+    }
+    return 0;
+}
+
+#if defined(MAKE_DLL) && defined(USE_LIBICONV_DLL)
+BOOL WINAPI
+DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpReserved)
+{
+    switch( fdwReason )
+    {
+    case DLL_PROCESS_ATTACH:
+        hwiniconv = (HMODULE)hinstDLL;
+        break;
+    case DLL_THREAD_ATTACH:
+    case DLL_THREAD_DETACH:
+    case DLL_PROCESS_DETACH:
+        break;
+    }
+    return TRUE;
+}
+#endif
+
+#if defined(MAKE_EXE)
+#include <stdio.h>
+#include <fcntl.h>
+#include <io.h>
+int
+main(int argc, char **argv)
+{
+    char *fromcode = NULL;
+    char *tocode = NULL;
+    int i;
+    char inbuf[BUFSIZ];
+    char outbuf[BUFSIZ];
+    const char *pin;
+    char *pout;
+    size_t inbytesleft;
+    size_t outbytesleft;
+    size_t rest = 0;
+    iconv_t cd;
+    size_t r;
+    FILE *in = stdin;
+
+    _setmode(_fileno(stdin), _O_BINARY);
+    _setmode(_fileno(stdout), _O_BINARY);
+
+    for (i = 1; i < argc; ++i)
+    {
+        if (strcmp(argv[i], "-l") == 0)
+        {
+            for (i = 0; codepage_alias[i].name != NULL; ++i)
+                printf("%s\n", codepage_alias[i].name);
+            return 0;
+        }
+
+        if (strcmp(argv[i], "-f") == 0)
+            fromcode = argv[++i];
+        else if (strcmp(argv[i], "-t") == 0)
+            tocode = argv[++i];
+        else
+        {
+            in = fopen(argv[i], "rb");
+            if (in == NULL)
+            {
+                fprintf(stderr, "cannot open %s\n", argv[i]);
+                return 1;
+            }
+            break;
+        }
+    }
+
+    if (fromcode == NULL || tocode == NULL)
+    {
+        printf("usage: %s -f from-enc -t to-enc [file]\n", argv[0]);
+        return 0;
+    }
+
+    cd = iconv_open(tocode, fromcode);
+    if (cd == (iconv_t)(-1))
+    {
+        perror("iconv_open error");
+        return 1;
+    }
+
+    while ((inbytesleft = fread(inbuf + rest, 1, sizeof(inbuf) - rest, in)) != 0
+            || rest != 0)
+    {
+        inbytesleft += rest;
+        pin = inbuf;
+        pout = outbuf;
+        outbytesleft = sizeof(outbuf);
+        r = iconv(cd, &pin, &inbytesleft, &pout, &outbytesleft);
+        fwrite(outbuf, 1, sizeof(outbuf) - outbytesleft, stdout);
+        if (r == (size_t)(-1) && errno != EINVAL && errno != E2BIG)
+        {
+            perror("conversion error");
+            return 1;
+        }
+        memmove(inbuf, pin, inbytesleft);
+        rest = inbytesleft;
+    }
+    pout = outbuf;
+    outbytesleft = sizeof(outbuf);
+    r = iconv(cd, NULL, NULL, &pout, &outbytesleft);
+    fwrite(outbuf, 1, sizeof(outbuf) - outbytesleft, stdout);
+    if (r == (size_t)(-1))
+    {
+        perror("conversion error");
+        return 1;
+    }
+
+    iconv_close(cd);
+
+    return 0;
+}
+#endif