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/* Character set conversion.
Copyright (C) 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <config.h>
/* Specification. */
#include <iconv.h>
#include <errno.h>
#include <string.h>
#include "c-ctype.h"
#define SIZEOF(a) (sizeof(a) / sizeof(a[0]))
/* Namespace cleanliness. */
#define mapping_lookup rpl_iconv_open_mapping_lookup
/* The macro ICONV_FLAVOR is defined to one of these. */
#define ICONV_FLAVOR_AIX "iconv_open-aix.h"
#define ICONV_FLAVOR_HPUX "iconv_open-hpux.h"
#define ICONV_FLAVOR_IRIX "iconv_open-irix.h"
#define ICONV_FLAVOR_OSF "iconv_open-osf.h"
#include ICONV_FLAVOR
iconv_t
rpl_iconv_open (const char *tocode, const char *fromcode)
#undef iconv_open
{
char fromcode_upper[32];
char tocode_upper[32];
char *fromcode_upper_end;
char *tocode_upper_end;
/* Try with the original names first.
This covers the case when fromcode or tocode is a lowercase encoding name
that is understood by the system's iconv_open but not listed in our
mappings table. */
{
iconv_t cd = iconv_open (tocode, fromcode);
if (cd != (iconv_t)(-1))
return cd;
}
/* Convert the encodings to upper case, because
1. in the arguments of iconv_open() on AIX, HP-UX, and OSF/1 the case
matters,
2. it makes searching in the table faster. */
{
const char *p = fromcode;
char *q = fromcode_upper;
while ((*q = c_toupper (*p)) != '\0')
{
p++;
q++;
if (q == &fromcode_upper[SIZEOF (fromcode_upper)])
{
errno = EINVAL;
return (iconv_t)(-1);
}
}
fromcode_upper_end = q;
}
{
const char *p = tocode;
char *q = tocode_upper;
while ((*q = c_toupper (*p)) != '\0')
{
p++;
q++;
if (q == &tocode_upper[SIZEOF (tocode_upper)])
{
errno = EINVAL;
return (iconv_t)(-1);
}
}
tocode_upper_end = q;
}
/* Apply the mappings. */
{
const struct mapping *m =
mapping_lookup (fromcode_upper, fromcode_upper_end - fromcode_upper);
fromcode = (m != NULL ? m->vendor_name : fromcode_upper);
}
{
const struct mapping *m =
mapping_lookup (tocode_upper, tocode_upper_end - tocode_upper);
tocode = (m != NULL ? m->vendor_name : tocode_upper);
}
return iconv_open (tocode, fromcode);
}