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04277e02d7
* All files with FSF copyright notices: Update copyright dates using scripts/update-copyrights. * locale/programs/charmap-kw.h: Regenerated. * locale/programs/locfile-kw.h: Likewise.
89 lines
2.6 KiB
C
89 lines
2.6 KiB
C
/* Get descriptor for character set conversion.
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Copyright (C) 1997-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but 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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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <alloca.h>
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#include <errno.h>
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#include <iconv.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gconv_int.h>
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#include "gconv_charset.h"
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iconv_t
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iconv_open (const char *tocode, const char *fromcode)
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{
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/* Normalize the name. We remove all characters beside alpha-numeric,
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'_', '-', '/', '.', and ':'. */
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size_t tocode_len = strlen (tocode) + 3;
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char *tocode_conv;
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bool tocode_usealloca = __libc_use_alloca (tocode_len);
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if (tocode_usealloca)
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tocode_conv = (char *) alloca (tocode_len);
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else
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{
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tocode_conv = (char *) malloc (tocode_len);
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if (tocode_conv == NULL)
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return (iconv_t) -1;
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}
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strip (tocode_conv, tocode);
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tocode = (tocode_conv[2] == '\0' && tocode[0] != '\0'
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? upstr (tocode_conv, tocode) : tocode_conv);
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size_t fromcode_len = strlen (fromcode) + 3;
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char *fromcode_conv;
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bool fromcode_usealloca = __libc_use_alloca (fromcode_len);
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if (fromcode_usealloca)
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fromcode_conv = (char *) alloca (fromcode_len);
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else
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{
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fromcode_conv = (char *) malloc (fromcode_len);
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if (fromcode_conv == NULL)
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{
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if (! tocode_usealloca)
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free (tocode_conv);
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return (iconv_t) -1;
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}
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}
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strip (fromcode_conv, fromcode);
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fromcode = (fromcode_conv[2] == '\0' && fromcode[0] != '\0'
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? upstr (fromcode_conv, fromcode) : fromcode_conv);
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__gconv_t cd;
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int res = __gconv_open (tocode, fromcode, &cd, 0);
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if (! fromcode_usealloca)
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free (fromcode_conv);
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if (! tocode_usealloca)
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free (tocode_conv);
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if (__builtin_expect (res, __GCONV_OK) != __GCONV_OK)
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{
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/* We must set the error number according to the specs. */
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if (res == __GCONV_NOCONV || res == __GCONV_NODB)
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__set_errno (EINVAL);
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cd = (iconv_t) -1;
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}
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return (iconv_t) cd;
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}
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