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/* Charset handling for GNU tar.
Copyright (C) 2004, 2006 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 <system.h>
#include <quotearg.h>
#include <localcharset.h>
#include "common.h"
#ifdef HAVE_ICONV_H
# include <iconv.h>
#endif
#ifndef ICONV_CONST
# define ICONV_CONST
#endif
#ifndef HAVE_ICONV
# undef iconv_open
# define iconv_open(tocode, fromcode) ((iconv_t) -1)
# undef iconv
# define iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft) ((size_t) 0)
# undef iconv_close
# define iconv_close(cd) 0
#endif
static iconv_t conv_desc[2] = { (iconv_t) -1, (iconv_t) -1 };
static iconv_t
utf8_init (bool to_utf)
{
if (conv_desc[(int) to_utf] == (iconv_t) -1)
{
if (to_utf)
conv_desc[(int) to_utf] = iconv_open ("UTF-8", locale_charset ());
else
conv_desc[(int) to_utf] = iconv_open (locale_charset (), "UTF-8");
}
return conv_desc[(int) to_utf];
}
bool
utf8_convert (bool to_utf, char const *input, char **output)
{
char ICONV_CONST *ib;
char *ob;
size_t inlen;
size_t outlen;
size_t rc;
iconv_t cd = utf8_init (to_utf);
if (cd == 0)
{
*output = xstrdup (input);
return true;
}
else if (cd == (iconv_t)-1)
return false;
inlen = strlen (input) + 1;
outlen = inlen * MB_LEN_MAX + 1;
ob = *output = xmalloc (outlen);
ib = (char ICONV_CONST *) input;
rc = iconv (cd, &ib, &inlen, &ob, &outlen);
*ob = 0;
return rc != -1;
}
bool
string_ascii_p (char const *p)
{
for (; *p; p++)
if (! (0 <= *p && *p <= 127))
return false;
return true;
}
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