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b008274afd
We better do this once and for all instead of cluttering all future commits with diffs of trailing white spaces. In the majority of cases blank or single lines are affected and thus this change won't disturb a git blame too much. For future commits the pre-commit scripts checks that this won't happen again.
819 lines
22 KiB
C
819 lines
22 KiB
C
/* utf8conf.c - UTF8 character set conversion
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* Copyright (C) 1994, 1998, 1999, 2000, 2001, 2003, 2006,
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* 2008, 2010 Free Software Foundation, Inc.
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*
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* This file is part of JNLIB.
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*
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* JNLIB is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as
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* published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* JNLIB is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdarg.h>
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#include <ctype.h>
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#ifdef HAVE_LANGINFO_CODESET
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#include <langinfo.h>
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#endif
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#include <errno.h>
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#ifndef HAVE_W32_SYSTEM
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# include <iconv.h>
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#endif
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#include "libjnlib-config.h"
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#include "stringhelp.h"
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#include "dynload.h"
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#include "utf8conv.h"
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#ifndef MB_LEN_MAX
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#define MB_LEN_MAX 16
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#endif
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static const char *active_charset_name = "iso-8859-1";
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static int no_translation; /* Set to true if we let simply pass through. */
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static int use_iconv; /* iconv comversion fucntions required. */
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/* Under W32 we dlopen the iconv dll and don't require any iconv
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related headers at all. However we need to define some stuff. */
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#ifdef HAVE_W32_SYSTEM
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typedef void *iconv_t;
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#ifndef ICONV_CONST
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#define ICONV_CONST
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#endif
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static iconv_t (* __stdcall iconv_open) (const char *tocode,
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const char *fromcode);
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static size_t (* __stdcall iconv) (iconv_t cd,
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char **inbuf, size_t *inbytesleft,
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char **outbuf, size_t *outbytesleft);
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static int (* __stdcall iconv_close) (iconv_t cd);
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static int
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load_libiconv (void)
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{
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#ifdef HAVE_W32CE_SYSTEM
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return -1; /* FIXME No libiconv yet - Need to investigate whether it
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is at all required. */
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#else
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static int done;
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if (!done)
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{
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void *handle;
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done = 1; /* Do it right now because we might get called recursivly
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through gettext. */
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handle = dlopen ("iconv.dll", RTLD_LAZY);
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if (handle)
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{
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iconv_open = dlsym (handle, "libiconv_open");
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if (iconv_open)
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iconv = dlsym (handle, "libiconv");
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if (iconv)
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iconv_close = dlsym (handle, "libiconv_close");
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}
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if (!handle || !iconv_close)
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{
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log_info (_("error loading `%s': %s\n"),
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"iconv.dll", dlerror ());
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log_info (_("please see %s for more information\n"),
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"http://www.gnupg.org/download/iconv.html");
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iconv_open = NULL;
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iconv = NULL;
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iconv_close = NULL;
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if (handle)
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dlclose (handle);
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}
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}
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return iconv_open? 0: -1;
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#endif
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}
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#endif /*HAVE_W32_SYSTEM*/
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/* Error handler for iconv failures. This is needed to not clutter the
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output with repeated diagnostics about a missing conversion. */
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static void
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handle_iconv_error (const char *to, const char *from, int use_fallback)
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{
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if (errno == EINVAL)
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{
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static int shown1, shown2;
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int x;
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if (to && !strcmp (to, "utf-8"))
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{
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x = shown1;
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shown1 = 1;
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}
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else
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{
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x = shown2;
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shown2 = 1;
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}
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if (!x)
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log_info (_("conversion from `%s' to `%s' not available\n"),
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from, to);
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}
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else
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{
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static int shown;
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if (!shown)
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log_info (_("iconv_open failed: %s\n"), strerror (errno));
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shown = 1;
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}
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if (use_fallback)
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{
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/* To avoid further error messages we fallback to Latin-1 for the
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native encoding. This is justified as one can expect that on a
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utf-8 enabled system nl_langinfo() will work and thus we won't
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never get to here. Thus Latin-1 seems to be a reasonable
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default. */
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active_charset_name = "iso-8859-1";
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no_translation = 0;
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use_iconv = 0;
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}
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}
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int
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set_native_charset (const char *newset)
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{
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const char *full_newset;
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if (!newset)
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{
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#ifdef HAVE_W32_SYSTEM
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static char codepage[30];
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unsigned int cpno;
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const char *aliases;
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/* We are a console program thus we need to use the
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GetConsoleOutputCP function and not the the GetACP which
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would give the codepage for a GUI program. Note this is not
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a bulletproof detection because GetConsoleCP might return a
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different one for console input. Not sure how to cope with
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that. If the console Code page is not known we fall back to
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the system code page. */
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#ifndef HAVE_W32CE_SYSTEM
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cpno = GetConsoleOutputCP ();
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if (!cpno)
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#endif
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cpno = GetACP ();
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sprintf (codepage, "CP%u", cpno );
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/* Resolve alias. We use a long string string and not the usual
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array to optimize if the code is taken to a DSO. Taken from
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libiconv 1.9.2. */
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newset = codepage;
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for (aliases = ("CP936" "\0" "GBK" "\0"
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"CP1361" "\0" "JOHAB" "\0"
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"CP20127" "\0" "ASCII" "\0"
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"CP20866" "\0" "KOI8-R" "\0"
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"CP21866" "\0" "KOI8-RU" "\0"
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"CP28591" "\0" "ISO-8859-1" "\0"
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"CP28592" "\0" "ISO-8859-2" "\0"
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"CP28593" "\0" "ISO-8859-3" "\0"
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"CP28594" "\0" "ISO-8859-4" "\0"
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"CP28595" "\0" "ISO-8859-5" "\0"
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"CP28596" "\0" "ISO-8859-6" "\0"
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"CP28597" "\0" "ISO-8859-7" "\0"
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"CP28598" "\0" "ISO-8859-8" "\0"
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"CP28599" "\0" "ISO-8859-9" "\0"
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"CP28605" "\0" "ISO-8859-15" "\0"
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"CP65001" "\0" "UTF-8" "\0");
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*aliases;
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aliases += strlen (aliases) + 1, aliases += strlen (aliases) + 1)
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{
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if (!strcmp (codepage, aliases) ||(*aliases == '*' && !aliases[1]))
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{
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newset = aliases + strlen (aliases) + 1;
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break;
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}
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}
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#else /*!HAVE_W32_SYSTEM*/
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#ifdef HAVE_LANGINFO_CODESET
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newset = nl_langinfo (CODESET);
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#else /*!HAVE_LANGINFO_CODESET*/
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/* Try to get the used charset from environment variables. */
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static char codepage[30];
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const char *lc, *dot, *mod;
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strcpy (codepage, "iso-8859-1");
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lc = getenv ("LC_ALL");
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if (!lc || !*lc)
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{
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lc = getenv ("LC_CTYPE");
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if (!lc || !*lc)
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lc = getenv ("LANG");
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}
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if (lc && *lc)
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{
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dot = strchr (lc, '.');
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if (dot)
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{
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mod = strchr (++dot, '@');
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if (!mod)
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mod = dot + strlen (dot);
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if (mod - dot < sizeof codepage && dot != mod)
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{
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memcpy (codepage, dot, mod - dot);
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codepage [mod - dot] = 0;
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}
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}
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}
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newset = codepage;
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#endif /*!HAVE_LANGINFO_CODESET*/
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#endif /*!HAVE_W32_SYSTEM*/
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}
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full_newset = newset;
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if (strlen (newset) > 3 && !ascii_memcasecmp (newset, "iso", 3))
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{
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newset += 3;
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if (*newset == '-' || *newset == '_')
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newset++;
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}
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/* Note that we silently assume that plain ASCII is actually meant
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as Latin-1. This makes sense because many Unix system don't have
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their locale set up properly and thus would get annoying error
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messages and we have to handle all the "bug" reports. Latin-1 has
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always been the character set used for 8 bit characters on Unix
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systems. */
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if ( !*newset
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|| !ascii_strcasecmp (newset, "8859-1" )
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|| !ascii_strcasecmp (newset, "646" )
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|| !ascii_strcasecmp (newset, "ASCII" )
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|| !ascii_strcasecmp (newset, "ANSI_X3.4-1968" )
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)
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{
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active_charset_name = "iso-8859-1";
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no_translation = 0;
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use_iconv = 0;
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}
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else if ( !ascii_strcasecmp (newset, "utf8" )
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|| !ascii_strcasecmp(newset, "utf-8") )
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{
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active_charset_name = "utf-8";
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no_translation = 1;
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use_iconv = 0;
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}
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else
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{
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iconv_t cd;
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#ifdef HAVE_W32_SYSTEM
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if (load_libiconv ())
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return -1;
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#endif /*HAVE_W32_SYSTEM*/
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cd = iconv_open (full_newset, "utf-8");
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if (cd == (iconv_t)-1)
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{
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handle_iconv_error (full_newset, "utf-8", 0);
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return -1;
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}
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iconv_close (cd);
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cd = iconv_open ("utf-8", full_newset);
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if (cd == (iconv_t)-1)
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{
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handle_iconv_error ("utf-8", full_newset, 0);
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return -1;
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}
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iconv_close (cd);
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active_charset_name = full_newset;
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no_translation = 0;
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use_iconv = 1;
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}
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return 0;
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}
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const char *
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get_native_charset ()
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{
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return active_charset_name;
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}
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/* Return true if the native charset is utf-8. */
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int
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is_native_utf8 (void)
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{
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return no_translation;
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}
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/* Convert string, which is in native encoding to UTF8 and return a
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new allocated UTF-8 string. This function terminates the process
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on memory shortage. */
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char *
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native_to_utf8 (const char *orig_string)
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{
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const unsigned char *string = (const unsigned char *)orig_string;
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const unsigned char *s;
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char *buffer;
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unsigned char *p;
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size_t length = 0;
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if (no_translation)
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{
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/* Already utf-8 encoded. */
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buffer = jnlib_xstrdup (orig_string);
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}
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else if (!use_iconv)
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{
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/* For Latin-1 we can avoid the iconv overhead. */
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for (s = string; *s; s++)
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{
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length++;
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if (*s & 0x80)
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length++;
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}
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buffer = jnlib_xmalloc (length + 1);
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for (p = (unsigned char *)buffer, s = string; *s; s++)
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{
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if ( (*s & 0x80 ))
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{
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*p++ = 0xc0 | ((*s >> 6) & 3);
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*p++ = 0x80 | (*s & 0x3f);
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}
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else
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*p++ = *s;
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}
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*p = 0;
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}
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else
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{
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/* Need to use iconv. */
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iconv_t cd;
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const char *inptr;
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char *outptr;
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size_t inbytes, outbytes;
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cd = iconv_open ("utf-8", active_charset_name);
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if (cd == (iconv_t)-1)
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{
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handle_iconv_error ("utf-8", active_charset_name, 1);
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return native_to_utf8 (string);
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}
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for (s=string; *s; s++ )
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{
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length++;
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if ((*s & 0x80))
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length += 5; /* We may need up to 6 bytes for the utf8 output. */
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}
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buffer = jnlib_xmalloc (length + 1);
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inptr = string;
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inbytes = strlen (string);
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outptr = buffer;
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outbytes = length;
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if ( iconv (cd, (ICONV_CONST char **)&inptr, &inbytes,
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&outptr, &outbytes) == (size_t)-1)
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{
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static int shown;
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if (!shown)
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log_info (_("conversion from `%s' to `%s' failed: %s\n"),
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active_charset_name, "utf-8", strerror (errno));
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shown = 1;
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/* We don't do any conversion at all but use the strings as is. */
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strcpy (buffer, string);
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}
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else /* Success. */
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{
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*outptr = 0;
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/* We could realloc the buffer now but I doubt that it makes
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much sense given that it will get freed anyway soon
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after. */
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}
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iconv_close (cd);
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}
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return buffer;
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}
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static char *
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do_utf8_to_native (const char *string, size_t length, int delim,
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int with_iconv)
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{
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int nleft;
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int i;
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unsigned char encbuf[8];
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int encidx;
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const unsigned char *s;
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size_t n;
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char *buffer = NULL;
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char *p = NULL;
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unsigned long val = 0;
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size_t slen;
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int resync = 0;
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/* First pass (p==NULL): count the extended utf-8 characters. */
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/* Second pass (p!=NULL): create string. */
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for (;;)
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{
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for (slen = length, nleft = encidx = 0, n = 0,
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s = (const unsigned char *)string;
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slen;
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s++, slen--)
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{
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if (resync)
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{
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if (!(*s < 128 || (*s >= 0xc0 && *s <= 0xfd)))
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{
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/* Still invalid. */
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if (p)
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{
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sprintf (p, "\\x%02x", *s);
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p += 4;
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}
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n += 4;
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continue;
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}
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resync = 0;
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}
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if (!nleft)
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{
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if (!(*s & 0x80))
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{
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/* Plain ascii. */
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if ( delim != -1
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&& (*s < 0x20 || *s == 0x7f || *s == delim
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|| (delim && *s == '\\')))
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{
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n++;
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if (p)
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*p++ = '\\';
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switch (*s)
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{
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case '\n': n++; if ( p ) *p++ = 'n'; break;
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case '\r': n++; if ( p ) *p++ = 'r'; break;
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case '\f': n++; if ( p ) *p++ = 'f'; break;
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case '\v': n++; if ( p ) *p++ = 'v'; break;
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case '\b': n++; if ( p ) *p++ = 'b'; break;
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case 0: n++; if ( p ) *p++ = '0'; break;
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default:
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n += 3;
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if (p)
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{
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sprintf (p, "x%02x", *s);
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p += 3;
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}
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break;
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}
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}
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else
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{
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if (p)
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*p++ = *s;
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n++;
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}
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}
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else if ((*s & 0xe0) == 0xc0) /* 110x xxxx */
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{
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val = *s & 0x1f;
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nleft = 1;
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encidx = 0;
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encbuf[encidx++] = *s;
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}
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|
else if ((*s & 0xf0) == 0xe0) /* 1110 xxxx */
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{
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val = *s & 0x0f;
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nleft = 2;
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encidx = 0;
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encbuf[encidx++] = *s;
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}
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else if ((*s & 0xf8) == 0xf0) /* 1111 0xxx */
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{
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val = *s & 0x07;
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nleft = 3;
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encidx = 0;
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encbuf[encidx++] = *s;
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}
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else if ((*s & 0xfc) == 0xf8) /* 1111 10xx */
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{
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val = *s & 0x03;
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nleft = 4;
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encidx = 0;
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encbuf[encidx++] = *s;
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}
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|
else if ((*s & 0xfe) == 0xfc) /* 1111 110x */
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{
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val = *s & 0x01;
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nleft = 5;
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encidx = 0;
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|
encbuf[encidx++] = *s;
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|
}
|
|
else /* Invalid encoding: print as \xNN. */
|
|
{
|
|
if (p)
|
|
{
|
|
sprintf (p, "\\x%02x", *s);
|
|
p += 4;
|
|
}
|
|
n += 4;
|
|
resync = 1;
|
|
}
|
|
}
|
|
else if (*s < 0x80 || *s >= 0xc0) /* Invalid utf-8 */
|
|
{
|
|
if (p)
|
|
{
|
|
for (i = 0; i < encidx; i++)
|
|
{
|
|
sprintf (p, "\\x%02x", encbuf[i]);
|
|
p += 4;
|
|
}
|
|
sprintf (p, "\\x%02x", *s);
|
|
p += 4;
|
|
}
|
|
n += 4 + 4 * encidx;
|
|
nleft = 0;
|
|
encidx = 0;
|
|
resync = 1;
|
|
}
|
|
else
|
|
{
|
|
encbuf[encidx++] = *s;
|
|
val <<= 6;
|
|
val |= *s & 0x3f;
|
|
if (!--nleft) /* Ready. */
|
|
{
|
|
if (no_translation)
|
|
{
|
|
if (p)
|
|
{
|
|
for (i = 0; i < encidx; i++)
|
|
*p++ = encbuf[i];
|
|
}
|
|
n += encidx;
|
|
encidx = 0;
|
|
}
|
|
else if (with_iconv)
|
|
{
|
|
/* Our strategy for using iconv is a bit strange
|
|
but it better keeps compatibility with
|
|
previous versions in regard to how invalid
|
|
encodings are displayed. What we do is to
|
|
keep the utf-8 as is and have the real
|
|
translation step then at the end. Yes, I
|
|
know that this is ugly. However we are short
|
|
of the 1.4 release and for this branch we
|
|
should not mess too much around with iconv
|
|
things. One reason for this is that we don't
|
|
know enough about non-GNU iconv
|
|
implementation and want to minimize the risk
|
|
of breaking the code on too many platforms. */
|
|
if ( p )
|
|
{
|
|
for (i=0; i < encidx; i++ )
|
|
*p++ = encbuf[i];
|
|
}
|
|
n += encidx;
|
|
encidx = 0;
|
|
}
|
|
else /* Latin-1 case. */
|
|
{
|
|
if (val >= 0x80 && val < 256)
|
|
{
|
|
/* We can simply print this character */
|
|
n++;
|
|
if (p)
|
|
*p++ = val;
|
|
}
|
|
else
|
|
{
|
|
/* We do not have a translation: print utf8. */
|
|
if (p)
|
|
{
|
|
for (i = 0; i < encidx; i++)
|
|
{
|
|
sprintf (p, "\\x%02x", encbuf[i]);
|
|
p += 4;
|
|
}
|
|
}
|
|
n += encidx * 4;
|
|
encidx = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
}
|
|
}
|
|
if (!buffer)
|
|
{
|
|
/* Allocate the buffer after the first pass. */
|
|
buffer = p = jnlib_xmalloc (n + 1);
|
|
}
|
|
else if (with_iconv)
|
|
{
|
|
/* Note: See above for comments. */
|
|
iconv_t cd;
|
|
const char *inptr;
|
|
char *outbuf, *outptr;
|
|
size_t inbytes, outbytes;
|
|
|
|
*p = 0; /* Terminate the buffer. */
|
|
|
|
cd = iconv_open (active_charset_name, "utf-8");
|
|
if (cd == (iconv_t)-1)
|
|
{
|
|
handle_iconv_error (active_charset_name, "utf-8", 1);
|
|
jnlib_free (buffer);
|
|
return utf8_to_native (string, length, delim);
|
|
}
|
|
|
|
/* Allocate a new buffer large enough to hold all possible
|
|
encodings. */
|
|
n = p - buffer + 1;
|
|
inbytes = n - 1;;
|
|
inptr = buffer;
|
|
outbytes = n * MB_LEN_MAX;
|
|
if (outbytes / MB_LEN_MAX != n)
|
|
BUG (); /* Actually an overflow. */
|
|
outbuf = outptr = jnlib_xmalloc (outbytes);
|
|
if ( iconv (cd, (ICONV_CONST char **)&inptr, &inbytes,
|
|
&outptr, &outbytes) == (size_t)-1)
|
|
{
|
|
static int shown;
|
|
|
|
if (!shown)
|
|
log_info (_("conversion from `%s' to `%s' failed: %s\n"),
|
|
"utf-8", active_charset_name, strerror (errno));
|
|
shown = 1;
|
|
/* Didn't worked out. Try again but without iconv. */
|
|
jnlib_free (buffer);
|
|
buffer = NULL;
|
|
jnlib_free (outbuf);
|
|
outbuf = do_utf8_to_native (string, length, delim, 0);
|
|
}
|
|
else /* Success. */
|
|
{
|
|
*outptr = 0; /* Make sure it is a string. */
|
|
/* We could realloc the buffer now but I doubt that it
|
|
makes much sense given that it will get freed
|
|
anyway soon after. */
|
|
jnlib_free (buffer);
|
|
}
|
|
iconv_close (cd);
|
|
return outbuf;
|
|
}
|
|
else /* Not using iconv. */
|
|
{
|
|
*p = 0; /* Make sure it is a string. */
|
|
return buffer;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Convert string, which is in UTF-8 to native encoding. Replace
|
|
illegal encodings by some "\xnn" and quote all control
|
|
characters. A character with value DELIM will always be quoted, it
|
|
must be a vanilla ASCII character. A DELIM value of -1 is special:
|
|
it disables all quoting of control characters. This function
|
|
terminates the process on memory shortage. */
|
|
char *
|
|
utf8_to_native (const char *string, size_t length, int delim)
|
|
{
|
|
return do_utf8_to_native (string, length, delim, use_iconv);
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Wrapper function for iconv_open, required for W32 as we dlopen that
|
|
library on that system. */
|
|
jnlib_iconv_t
|
|
jnlib_iconv_open (const char *tocode, const char *fromcode)
|
|
{
|
|
#ifdef HAVE_W32_SYSTEM
|
|
if (load_libiconv ())
|
|
return (jnlib_iconv_t)(-1);
|
|
#endif /*HAVE_W32_SYSTEM*/
|
|
|
|
return (jnlib_iconv_t)iconv_open (tocode, fromcode);
|
|
}
|
|
|
|
|
|
/* Wrapper function for iconv, required for W32 as we dlopen that
|
|
library on that system. */
|
|
size_t
|
|
jnlib_iconv (jnlib_iconv_t cd,
|
|
const char **inbuf, size_t *inbytesleft,
|
|
char **outbuf, size_t *outbytesleft)
|
|
{
|
|
|
|
#ifdef HAVE_W32_SYSTEM
|
|
if (load_libiconv ())
|
|
return 0;
|
|
#endif /*HAVE_W32_SYSTEM*/
|
|
|
|
return iconv ((iconv_t)cd, (char**)inbuf, inbytesleft, outbuf, outbytesleft);
|
|
}
|
|
|
|
/* Wrapper function for iconv_close, required for W32 as we dlopen that
|
|
library on that system. */
|
|
int
|
|
jnlib_iconv_close (jnlib_iconv_t cd)
|
|
{
|
|
#ifdef HAVE_W32_SYSTEM
|
|
if (load_libiconv ())
|
|
return 0;
|
|
#endif /*HAVE_W32_SYSTEM*/
|
|
|
|
return iconv_close ((iconv_t)cd);
|
|
}
|
|
|
|
|
|
#ifdef HAVE_W32_SYSTEM
|
|
/* Return a malloced string encoded in UTF-8 from the wide char input
|
|
string STRING. Caller must free this value. Returns NULL and sets
|
|
ERRNO on failure. Calling this function with STRING set to NULL is
|
|
not defined. */
|
|
char *
|
|
wchar_to_utf8 (const wchar_t *string)
|
|
{
|
|
int n;
|
|
char *result;
|
|
|
|
n = WideCharToMultiByte (CP_UTF8, 0, string, -1, NULL, 0, NULL, NULL);
|
|
if (n < 0)
|
|
{
|
|
jnlib_set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
|
|
result = jnlib_malloc (n+1);
|
|
if (!result)
|
|
return NULL;
|
|
|
|
n = WideCharToMultiByte (CP_UTF8, 0, string, -1, result, n, NULL, NULL);
|
|
if (n < 0)
|
|
{
|
|
jnlib_free (result);
|
|
jnlib_set_errno (EINVAL);
|
|
result = NULL;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
/* Return a malloced wide char string from an UTF-8 encoded input
|
|
string STRING. Caller must free this value. Returns NULL and sets
|
|
ERRNO on failure. Calling this function with STRING set to NULL is
|
|
not defined. */
|
|
wchar_t *
|
|
utf8_to_wchar (const char *string)
|
|
{
|
|
int n;
|
|
size_t nbytes;
|
|
wchar_t *result;
|
|
|
|
n = MultiByteToWideChar (CP_UTF8, 0, string, -1, NULL, 0);
|
|
if (n < 0)
|
|
{
|
|
jnlib_set_errno (EINVAL);
|
|
return NULL;
|
|
}
|
|
|
|
nbytes = (size_t)(n+1) * sizeof(*result);
|
|
if (nbytes / sizeof(*result) != (n+1))
|
|
{
|
|
jnlib_set_errno (ENOMEM);
|
|
return NULL;
|
|
}
|
|
result = jnlib_malloc (nbytes);
|
|
if (!result)
|
|
return NULL;
|
|
|
|
n = MultiByteToWideChar (CP_UTF8, 0, string, -1, result, n);
|
|
if (n < 0)
|
|
{
|
|
free (result);
|
|
jnlib_set_errno (EINVAL);
|
|
result = NULL;
|
|
}
|
|
return result;
|
|
}
|
|
#endif /*HAVE_W32_SYSTEM*/
|