ldap/common/convutf8.c

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation. Portions created by Netscape are
 * Copyright (C) 1998-1999 Netscape Communications Corporation. All
 * Rights Reserved.
 *
 * Contributor(s):
 */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <ctype.h>

#ifndef HAVE_LIBICU

#ifdef SOLARIS_LDAP_CMD
#include <errno.h>
#include <langinfo.h>
#include <iconv.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

extern char *ldaptool_charset;
char        *ldaptool_convdir = NULL;
static      int charsetset = 0;
char        *ldaptool_local2UTF8( const char *src );

#ifdef SOLARIS_LDAP_CMD
static char     *ldaptool_convert( const char *src, const char *fcode,
                const char *tcode);
char        *ldaptool_UTF82local( const char *src );
#endif  /* SOLARIS_LDAP_CMD */

#ifdef SOLARIS_LDAP_CMD
/*
 * ICU version always returns string, unless strdup fails.
 * As in ICU version, in case of error strdup(src)
 * Usually strdup(src) will be ASCII and legal anyways.
 */

static char *
ldaptool_convert( const char *src, const char *fcode,
                 const char *tcode) {
    char    *dest, *tptr, *tmp;
    const char  *fptr;
    iconv_t cd;
    size_t  ileft, oleft, ret, size;

    if (src == NULL)
    return (NULL);

    if (fcode == NULL || tcode == NULL)
    return (strdup(src));

    if (strcasecmp(fcode, tcode) == 0)
    return (strdup(src));

    if ((cd = iconv_open(tcode, fcode)) == (iconv_t)-1) {
    /* conversion table not available */
    return (strdup(src));
    }

    ileft = strlen(src);
    oleft = 2 * ileft;
    size = oleft;
    ret = -1;
    if ((dest = (char *)malloc(size)) == NULL) {
    (void) iconv_close(cd);
    /* maybe sizeof strlen(src) memory still exists */
    return (strdup(src));
    }
    tptr = dest;
    fptr = src;

    for (;;) {
    ret = iconv(cd, &fptr, &ileft, &tptr, &oleft);

    if (ret != (size_t)-1) {
        /*
         * Success. Place 'cd' into its initial shift
         * state before returning.
         */
        if (fptr == NULL) /* already in initial state  */
            break;
        fptr = NULL;
        ileft = 0;
        continue;
    } if (errno == E2BIG) {
        /*
         * Lack of space in output buffer.
         * Hence double the size and retry.
         * But before calling  iconv(), oleft
         * and tptr have to re-adjusted, so that
         * iconv() doesn't overwrite the data
         * which has already been converted.
         */
        oleft += size;
        size *= 2;
        if ((tmp = (char *) realloc(dest, size)) == NULL)
            break;
        tptr = tmp + (tptr - dest);
        dest = tmp;
        continue;
    } else {
        /* Other errors */
        break;
    }
    }

    if (dest != NULL) {
    if (ret == -1) {
            /* Free malloc'ed memory on failure */
        free(dest);
        dest = NULL;
    } else if (oleft > 0) {
        /* NULL terminate the return value */
        *(dest + (size - oleft)) = '\0';
    } else {
        /* realloc one more byte and NULL terminate */
        if ((tmp = (char *) realloc(dest, size + 1)) == NULL) {
            free(dest);
            dest = NULL;
        } else {
            *(dest + size) = '\0';
        }
    }
    }

    (void) iconv_close(cd);
    if (dest == NULL) {
    /* last chance in case some other failure along the way occurs */
    return (strdup(src));
    }
    return (dest);
}

char *
ldaptool_UTF82local( const char *src )
{
    char *to_code;
    if ((to_code = nl_langinfo(CODESET)) == NULL)
    return (strdup(src));
    return (ldaptool_convert(src, "UTF-8", (const char *)to_code));
}
#endif  /* SOLARIS_LDAP_CMD */

char *
ldaptool_local2UTF8( const char *src )
{
#ifdef SOLARIS_LDAP_CMD
    char *from_code;
    if ((from_code = nl_langinfo(CODESET)) == NULL)
    return (strdup(src));
    return (ldaptool_convert(src, (const char *)from_code, "UTF-8"));
#else
    char *utf8;
    charsetset = 0;
    if (src == NULL)
    {
    return NULL;
    }
    utf8 = strdup(src);
    return ( utf8 );
#endif  /* SOLARIS_LDAP_CMD */
}

#else /* HAVE_LIBICU */

#include "unicode/utypes.h"
#include "unicode/ucnv.h"

#define NSPR20

#ifdef XP_WIN32
#define  VC_EXTRALEAN
#include <afxwin.h>
#include <winnls.h>
#endif

extern char *ldaptool_charset;
static int charsetset = 0;

extern "C" {
char *ldaptool_convdir = NULL;
char *ldaptool_local2UTF8( const char * );
}

#ifndef XP_WIN32
char * GetNormalizedLocaleName(void);


char *
GetNormalizedLocaleName(void)
{
#ifdef _HPUX_SOURCE

    int    len;
    char    *locale;

    locale = setlocale(LC_CTYPE, "");
    if (locale && *locale) {
        len = strlen(locale);
    } else {
        locale = "C";
        len = 1;
    }

    if ((!strncmp(locale, "/\x03:", 3)) &&
        (!strcmp(&locale[len - 2], ";/"))) {
        locale += 3;
        len -= 5;
    }

    locale = strdup(locale);
    if (locale) {
        locale[len] = 0;
    }

    return locale;

#else

    char    *locale;

    locale = setlocale(LC_CTYPE, "");
    if (locale && *locale) {
        return strdup(locale);
    }

    return strdup("C");

#endif
}

#if defined(IRIX)
const char *CHARCONVTABLE[] =
{
"! This table maps the host's locale names to IANA charsets",
"!",
"C:             ISO_8859-1:1987",
"cs:            ISO_8859-2:1987",
"da:            ISO_8859-1:1987",
"de:            ISO_8859-1:1987",
"de_AT:         ISO_8859-1:1987",
"de_CH:         ISO_8859-1:1987",
"en:            ISO_8859-1:1987",
"en_AU:         ISO_8859-1:1987",
"en_CA:         ISO_8859-1:1987",
"en_TH:         ISO_8859-1:1987",
"en_US:         ISO_8859-1:1987",
"es:            ISO_8859-1:1987",
"fi:            ISO_8859-1:1987",
"fr:            ISO_8859-1:1987",
"fr_BE:         ISO_8859-1:1987",
"fr_CA:         ISO_8859-1:1987",
"fr_CH:         ISO_8859-1:1987",
"is:            ISO_8859-1:1987",
"it:            ISO_8859-1:1987",
"it_CH:         ISO_8859-1:1987",
"ja_JP.EUC:     Extended_UNIX_Code_Packed_Format_for_Japanese",
"ko_KR.euc:     EUC-KR",
"nl:            ISO_8859-1:1987",
"nl_BE:         ISO_8859-1:1987",
"no:            ISO_8859-1:1987",
"pl:            ISO_8859-2:1987",
"pt:            ISO_8859-1:1987",
"sh:            ISO_8859-2:1987",
"sk:            ISO_8859-2:1987",
"sv:            ISO_8859-1:1987",
"zh_CN.ugb:     GB2312",
"zh_TW.ucns:    cns11643_1",
NULL
};
#elif defined(SOLARIS)
const char *CHARCONVTABLE[] =
{
"! This table maps the host's locale names to IANA charsets",
"!",
"C:             ISO_8859-1:1987",
"ja:            Extended_UNIX_Code_Packed_Format_for_Japanese",
"ja_JP.EUC:     Extended_UNIX_Code_Packed_Format_for_Japanese",
"ja_JP.PCK:     Shift_JIS",
"en:        ISO_8859-1:1987",
"en_AU:     ISO_8859-1:1987",
"en_CA:     ISO_8859-1:1987",
"en_UK:     ISO_8859-1:1987",
"en_US:     ISO_8859-1:1987",
"es:        ISO_8859-1:1987",
"es_AR:     ISO_8859-1:1987",
"es_BO:     ISO_8859-1:1987",
"es_CL:     ISO_8859-1:1987",
"es_CO:     ISO_8859-1:1987",
"es_CR:     ISO_8859-1:1987",
"es_EC:     ISO_8859-1:1987",
"es_GT:     ISO_8859-1:1987",
"es_MX:     ISO_8859-1:1987",
"es_NI:     ISO_8859-1:1987",
"es_PA:     ISO_8859-1:1987",
"es_PE:     ISO_8859-1:1987",
"es_PY:     ISO_8859-1:1987",
"es_SV:     ISO_8859-1:1987",
"es_UY:     ISO_8859-1:1987",
"es_VE:     ISO_8859-1:1987",
"fr:        ISO_8859-1:1987",
"fr_BE:     ISO_8859-1:1987",
"fr_CA:     ISO_8859-1:1987",
"fr_CH:     ISO_8859-1:1987",
"de:        ISO_8859-1:1987",
"de_AT:     ISO_8859-1:1987",
"de_CH:     ISO_8859-1:1987",
"nl:        ISO_8859-1:1987",
"nl_BE:     ISO_8859-1:1987",
"it:        ISO_8859-1:1987",
"sv:        ISO_8859-1:1987",
"no:        ISO_8859-1:1987",
"da:        ISO_8859-1:1987",
"iso_8859_1:    ISO_8859-1:1987",
"japanese:      Extended_UNIX_Code_Packed_Format_for_Japanese",
"ko:            EUC-KR",
"zh:            GB2312",
"zh_TW:         cns11643_1",
NULL
};
#elif defined(OSF1)
const char *CHARCONVTABLE[] =
{
"! This table maps the host's locale names to IANA charsets",
"!",
"C:                     ISO_8859-1:1987",
"cs_CZ.ISO8859-2:       ISO_8859-2:1987",
"cs_CZ:                 ISO_8859-2:1987",
"da_DK.ISO8859-1:       ISO_8859-1:1987",
"de_CH.ISO8859-1:       ISO_8859-1:1987",
"de_DE.ISO8859-1:       ISO_8859-1:1987",
"en_GB.ISO8859-1:       ISO_8859-1:1987",
"en_US.ISO8859-1:       ISO_8859-1:1987",
"es_ES.ISO8859-1:       ISO_8859-1:1987",
"fi_FI.ISO8859-1:       ISO_8859-1:1987",
"fr_BE.ISO8859-1:       ISO_8859-1:1987",
"fr_CA.ISO8859-1:       ISO_8859-1:1987",
"fr_CH.ISO8859-1:       ISO_8859-1:1987",
"fr_FR.ISO8859-1:       ISO_8859-1:1987",
"hu_HU.ISO8859-2:       ISO_8859-2:1987",
"hu_HU:                 ISO_8859-2:1987",
"is_IS.ISO8859-1:       ISO_8859-1:1987",
"it_IT.ISO8859-1:       ISO_8859-1:1987",
"ja_JP.SJIS:            Shift_JIS",
"ja_JP.eucJP:           Extended_UNIX_Code_Packed_Format_for_Japanese",
"ja_JP:                 Extended_UNIX_Code_Packed_Format_for_Japanese",
"ko_KR.eucKR:           EUC-KR",
"ko_KR:                 EUC-KR",
"nl_BE.ISO8859-1:       ISO_8859-1:1987",
"nl_NL.ISO8859-1:       ISO_8859-1:1987",
"no_NO.ISO8859-1:       ISO_8859-1:1987",
"pl_PL.ISO8859-2:       ISO_8859-2:1987",
"pl_PL:                 ISO_8859-2:1987",
"pt_PT.ISO8859-1:       ISO_8859-1:1987",
"sk_SK.ISO8859-2:       ISO_8859-2:1987",
"sk_SK:                 ISO_8859-2:1987",
"sv_SE.ISO8859-1:       ISO_8859-1:1987",
"zh_CN:                 GB2312",
"zh_HK.big5:            Big5",
"zh_HK.eucTW:           cns11643_1",
"zh_TW.big5:            Big5",
"zh_TW.big5@chuyin:     Big5",
"zh_TW.big5@radical:    Big5",
"zh_TW.big5@stroke:     Big5",
"zh_TW.eucTW:           cns11643_1",
"zh_TW.eucTW@chuyin:    cns11643_1",
"zh_TW.eucTW@radical:   cns11643_1",
"zh_TW.eucTW@stroke:    cns11643_1",
"zh_TW:                 cns11643_1",
NULL
};
#elif defined(HPUX)
const char *CHARCONVTABLE[] =
{
"! This table maps the host's locale names to IANA charsets",
"!",
"C:         ISO_8859-1:1987",
"ja_JP:         Extended_UNIX_Code_Packed_Format_for_Japanese",
"ja_JP.SJIS:        Shift_JIS",
"ja_JP.eucJP:       Extended_UNIX_Code_Packed_Format_for_Japanese",
"es_ES:         ISO_8859-1:1987",
"es_ES.iso88591:    ISO_8859-1:1987",
"sv_SE:         ISO_8859-1:1987",
"sv_SE.iso88591:    ISO_8859-1:1987",
"da_DK:         ISO_8859-1:1987",
"da_DK.iso88591:    ISO_8859-1:1987",
"nl_NL:         ISO_8859-1:1987",
"nl_NL.iso88591:    ISO_8859-1:1987",
"en:            ISO_8859-1:1987",
"en_GB:         ISO_8859-1:1987",
"en_GB.iso88591:    ISO_8859-1:1987",
"en_US:         ISO_8859-1:1987",
"en_US.iso88591:    ISO_8859-1:1987",
"fi_FI:         ISO_8859-1:1987",
"fi_FI.iso88591:    ISO_8859-1:1987",
"fr_CA:         ISO_8859-1:1987",
"fr_CA.iso88591:    ISO_8859-1:1987",
"fr_FR:         ISO_8859-1:1987",
"fr_FR.iso88591:    ISO_8859-1:1987",
"de_DE:         ISO_8859-1:1987",
"de_DE.iso88591:    ISO_8859-1:1987",
"is_IS:         ISO_8859-1:1987",
"is_IS.iso88591:    ISO_8859-1:1987",
"it_IT:         ISO_8859-1:1987",
"it_IT.iso88591:    ISO_8859-1:1987",
"no_NO:         ISO_8859-1:1987",
"no_NO.iso88591:    ISO_8859-1:1987",
"pt_PT:         ISO_8859-1:1987",
"pt_PT.iso88591:    ISO_8859-1:1987",
"hu_HU:         ISO_8859-2:1987",
"hu_HU.iso88592:    ISO_8859-2:1987",
"cs_CZ:         ISO_8859-2:1987",
"cs_CZ.iso88592:    ISO_8859-2:1987",
"pl_PL:         ISO_8859-2:1987",
"pl_PL.iso88592:    ISO_8859-2:1987",
"ro_RO:         ISO_8859-2:1987",
"ro_RO.iso88592:    ISO_8859-2:1987",
"hr_HR:         ISO_8859-2:1987",
"hr_HR.iso88592:    ISO_8859-2:1987",
"sk_SK:         ISO_8859-2:1987",
"sk_SK.iso88592:    ISO_8859-2:1987",
"sl_SI:         ISO_8859-2:1987",
"sl_SI.iso88592:    ISO_8859-2:1987",
"american.iso88591:     ISO_8859-1:1987",
"bulgarian:             ISO_8859-2:1987",
"c-french.iso88591:     ISO_8859-1:1987",
"chinese-s:             GB2312",
"chinese-t.big5:                Big5",
"czech:                 ISO_8859-2:1987",
"danish.iso88591:       ISO_8859-1:1987",
"dutch.iso88591:                ISO_8859-1:1987",
"english.iso88591:      ISO_8859-1:1987",
"finnish.iso88591:      ISO_8859-1:1987",
"french.iso88591:       ISO_8859-1:1987",
"german.iso88591:       ISO_8859-1:1987",
"hungarian:             ISO_8859-2:1987",
"icelandic.iso88591:    ISO_8859-1:1987",
"italian.iso88591:      ISO_8859-1:1987",
"japanese.euc:          Extended_UNIX_Code_Packed_Format_for_Japanese",
"japanese:              Shift_JIS",
"katakana:              Shift_JIS",
"korean:                        EUC-KR",
"norwegian.iso88591:    ISO_8859-1:1987",
"polish:                        ISO_8859-2:1987",
"portuguese.iso88591:   ISO_8859-1:1987",
"rumanian:              ISO_8859-2:1987",
"serbocroatian:         ISO_8859-2:1987",
"slovene:               ISO_8859-2:1987",
"spanish.iso88591:      ISO_8859-1:1987",
"swedish.iso88591:      ISO_8859-1:1987",
NULL
};
#elif defined(AIX)
const char *CHARCONVTABLE[] =
{
"! This table maps the host's locale names to IANA charsets",
"!",
"C:                     ISO_8859-1:1987",
"En_JP.IBM-932:         Shift_JIS",
"En_JP:                 Shift_JIS",
"Ja_JP.IBM-932:         Shift_JIS",
"Ja_JP:                 Shift_JIS",
"da_DK.ISO8859-1:       ISO_8859-1:1987",
"da_DK:                 ISO_8859-1:1987",
"de_CH.ISO8859-1:       ISO_8859-1:1987",
"de_CH:                 ISO_8859-1:1987",
"de_DE.ISO8859-1:       ISO_8859-1:1987",
"de_DE:                 ISO_8859-1:1987",
"en_GB.ISO8859-1:       ISO_8859-1:1987",
"en_GB:                 ISO_8859-1:1987",
"en_JP.IBM-eucJP:       Extended_UNIX_Code_Packed_Format_for_Japanese",
"en_JP:                 Extended_UNIX_Code_Packed_Format_for_Japanese",
"en_KR.IBM-eucKR:       EUC-KR",
"en_KR:                 EUC-KR",
"en_TW.IBM-eucTW:       cns11643_1",
"en_TW:                 cns11643_1",
"en_US.ISO8859-1:       ISO_8859-1:1987",
"en_US:                 ISO_8859-1:1987",
"es_ES.ISO8859-1:       ISO_8859-1:1987",
"es_ES:                 ISO_8859-1:1987",
"fi_FI.ISO8859-1:       ISO_8859-1:1987",
"fi_FI:                 ISO_8859-1:1987",
"fr_BE.ISO8859-1:       ISO_8859-1:1987",
"fr_BE:                 ISO_8859-1:1987",
"fr_CA.ISO8859-1:       ISO_8859-1:1987",
"fr_CA:                 ISO_8859-1:1987",
"fr_CH.ISO8859-1:       ISO_8859-1:1987",
"fr_CH:                 ISO_8859-1:1987",
"fr_FR.ISO8859-1:       ISO_8859-1:1987",
"fr_FR:                 ISO_8859-1:1987",
"is_IS.ISO8859-1:       ISO_8859-1:1987",
"is_IS:                 ISO_8859-1:1987",
"it_IT.ISO8859-1:       ISO_8859-1:1987",
"it_IT:                 ISO_8859-1:1987",
"ja_JP.IBM-eucJP:       Extended_UNIX_Code_Packed_Format_for_Japanese",
"ja_JP:                 Extended_UNIX_Code_Packed_Format_for_Japanese",
"ko_KR.IBM-eucKR:       EUC-KR",
"ko_KR:                 EUC-KR",
"nl_BE.ISO8859-1:       ISO_8859-1:1987",
"nl_BE:                 ISO_8859-1:1987",
"nl_NL.ISO8859-1:       ISO_8859-1:1987",
"nl_NL:                 ISO_8859-1:1987",
"no_NO.ISO8859-1:       ISO_8859-1:1987",
"no_NO:                 ISO_8859-1:1987",
"pt_PT.ISO8859-1:       ISO_8859-1:1987",
"pt_PT:                 ISO_8859-1:1987",
"sv_SE.ISO8859-1:       ISO_8859-1:1987",
"sv_SE:                 ISO_8859-1:1987",
"zh_TW.IBM-eucTW:       cns11643_1",
"zh_TW:                 cns11643_1",
NULL
};
#else   // sunos by default
const char *CHARCONVTABLE[] =
{
"! This table maps the host's locale names to IANA charsets",
"!",
"C:             ISO_8859-1:1987",
"de:            ISO_8859-1:1987",
"en_US:         ISO_8859-1:1987",
"es:            ISO_8859-1:1987",
"fr:            ISO_8859-1:1987",
"iso_8859_1:    ISO_8859-1:1987",
"it:            ISO_8859-1:1987",
"ja:            Extended_UNIX_Code_Packed_Format_for_Japanese",
"ja_JP.EUC:     Extended_UNIX_Code_Packed_Format_for_Japanese",
"japanese:      Extended_UNIX_Code_Packed_Format_for_Japanese",
"ko:            EUC-KR",
"sv:            ISO_8859-1:1987",
"zh:            GB2312",
"zh_TW:         cns11643_1",
NULL
};
#endif

#define BSZ     256

char *
GetCharsetFromLocale(char *locale)
{
    char *tmpcharset = NULL;
    char buf[BSZ];
    char *p;
    const char *line;
    int i=0;

    line = CHARCONVTABLE[i];
    while (line != NULL)
    {
       if (*line == 0)
       {
          break;
       }

       strcpy(buf, line);
       line = CHARCONVTABLE[++i];

       if (strlen(buf) == 0 || buf[0] == '!')
       {
          continue;
       }
       p = strchr(buf, ':');
       if (p == NULL)
       {
          tmpcharset = NULL;
          break;
       }
       *p = 0;
       if (strcmp(buf, locale) == 0) {
          while (*++p == ' ' || *p == '\t')
             ;
          if (isalpha(*p)) {
             tmpcharset = strdup(p);
          } else
             tmpcharset = NULL;

          break;
       }
    }
    return tmpcharset;
}

#endif /* Not defined XP_WIN32 */

#ifdef XP_WIN32
char *_convertor(const char *instr, int bFromUTF8)
{
    char  *outstr = NULL;
    int    inlen, wclen, outlen;
    LPWSTR wcstr;

    if (instr == NULL)
            return NULL;

    if ((inlen = strlen(instr)) <= 0)
            return NULL;

    /* output never becomes longer than input,
     * thus we don't have to ask for the length
     */
    wcstr = (LPWSTR) malloc( sizeof( WCHAR ) * (inlen+1) );
    if (!wcstr)
        return NULL;

    wclen = MultiByteToWideChar(bFromUTF8 ? CP_UTF8 : CP_ACP, 0, instr,
                                 inlen, wcstr, inlen);
    outlen = WideCharToMultiByte(bFromUTF8 ? CP_ACP : CP_UTF8, 0, wcstr,
                                  wclen, NULL, 0, NULL, NULL);

    if (outlen > 0) {
        outstr = (char *) malloc(outlen + 2);
        outlen = WideCharToMultiByte(bFromUTF8 ? CP_ACP : CP_UTF8, 0, wcstr,
                                      wclen, outstr, outlen, NULL, NULL);
        if (outlen > 0)
            *(outstr+outlen) = _T('\0');
        else
            return NULL;
    }
    free( wcstr );
    return outstr;
}
#endif

char *
ldaptool_local2UTF8( const char *src )
{
    char *utf8;
#ifndef XP_WIN32
    char *locale, *newcharset;
    size_t outLen, resultLen;
    UErrorCode err = U_ZERO_ERROR;
    UConverter *cnv;

    if (src == NULL)
    {
      return NULL;
    }
    else if (*src == 0 || (ldaptool_charset == NULL)
         || (!strcmp( ldaptool_charset, "" )))
    {
    /* no option specified, so assume it's already in utf-8 */
        utf8 = strdup(src);
        return utf8;
    }

    if( !strcmp( ldaptool_charset, "0" )
        && (!charsetset) )
    {
    /* zero option specified, so try to get default codepage
       this sucker is strdup'd immediately so it's OK to cast */
    newcharset = (char *)ucnv_getDefaultName();
    if (newcharset != NULL) {
        free( ldaptool_charset );
        /* the default codepage lives in ICU */
        ldaptool_charset = strdup(newcharset);
        if (ldaptool_charset == NULL) {
        return strdup(src);
        }
    }
    charsetset = 1;
    }
    else
    if( strcmp( ldaptool_charset, "" ) && (!charsetset) )
    {
    /* -i option specified with charset name */
        charsetset = 1;
    }

    /* do the preflight - get the size needed for the target buffer */
    outLen = (size_t) ucnv_convert( "utf-8", ldaptool_charset, NULL, 0, src,
                                      strlen( src ) * sizeof(char), &err);

    if ((err != U_BUFFER_OVERFLOW_ERROR) || (outLen == 0)) {
      /* default to just a copy of the string - this covers
         the case of an illegal charset also */
      return strdup(src);
    }

    utf8 =  (char *) malloc( outLen + 1);
    if( utf8 == NULL ) {
      /* if we're already out of memory, does strdup just return NULL? */
       return strdup(src);
    }

    /* do the actual conversion this time */
    err = U_ZERO_ERROR;
    resultLen = ucnv_convert( "utf-8", ldaptool_charset, utf8, (outLen + 1), src,
               strlen(src) * sizeof(char), &err );

    if (!U_SUCCESS(err)) {
      free(utf8);
      return strdup(src);
    }

#else
    utf8 = _convertor(src, FALSE);
    if( utf8 == NULL )
        utf8 = strdup(src);
#endif

    return utf8;
}
#endif /* HAVE_LIBICU */

#ifndef HAVE_LIBICU
#ifdef __cplusplus
}
#endif
#endif