| 1 | /* Charset handling for GNU tar.
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| 2 |
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| 3 | Copyright (C) 2004 Free Software Foundation, Inc.
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| 4 |
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| 5 | This program is free software; you can redistribute it and/or modify it
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| 6 | under the terms of the GNU General Public License as published by the
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| 7 | Free Software Foundation; either version 2, or (at your option) any later
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| 8 | version.
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| 9 |
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| 10 | This program is distributed in the hope that it will be useful, but
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| 11 | WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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| 13 | Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU General Public License along
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| 16 | with this program; if not, write to the Free Software Foundation, Inc.,
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| 17 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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| 18 |
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| 19 | #include <system.h>
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| 20 | #include <quotearg.h>
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| 21 | #include <localcharset.h>
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| 22 | #include "common.h"
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| 23 | #ifdef HAVE_ICONV_H
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| 24 | # include <iconv.h>
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| 25 | #endif
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| 26 |
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| 27 | #ifndef ICONV_CONST
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| 28 | # define ICONV_CONST
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| 29 | #endif
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| 30 |
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| 31 | #ifndef HAVE_ICONV
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| 32 |
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| 33 | # undef iconv_open
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| 34 | # define iconv_open(tocode, fromcode) ((iconv_t) -1)
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| 35 |
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| 36 | # undef iconv
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| 37 | # define iconv(cd, inbuf, inbytesleft, outbuf, outbytesleft) ((size_t) 0)
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| 38 |
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| 39 | # undef iconv_close
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| 40 | # define iconv_close(cd) 0
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| 41 |
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| 42 | #endif
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| 43 |
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| 44 |
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| 45 | |
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| 46 |
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| 47 |
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| 48 | static iconv_t conv_desc[2] = { (iconv_t) -1, (iconv_t) -1 };
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| 49 |
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| 50 | static iconv_t
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| 51 | utf8_init (bool to_utf)
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| 52 | {
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| 53 | if (conv_desc[(int) to_utf] == (iconv_t) -1)
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| 54 | {
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| 55 | if (to_utf)
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| 56 | conv_desc[(int) to_utf] = iconv_open ("UTF-8", locale_charset ());
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| 57 | else
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| 58 | conv_desc[(int) to_utf] = iconv_open (locale_charset (), "UTF-8");
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| 59 | }
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| 60 | return conv_desc[(int) to_utf];
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| 61 | }
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| 62 |
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| 63 | bool
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| 64 | utf8_convert (bool to_utf, char const *input, char **output)
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| 65 | {
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| 66 | char ICONV_CONST *ib;
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| 67 | char *ob;
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| 68 | size_t inlen;
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| 69 | size_t outlen;
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| 70 | size_t rc;
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| 71 | iconv_t cd = utf8_init (to_utf);
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| 72 |
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| 73 | if (cd == 0)
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| 74 | {
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| 75 | *output = xstrdup (input);
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| 76 | return true;
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| 77 | }
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| 78 | else if (cd == (iconv_t)-1)
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| 79 | return false;
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| 80 |
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| 81 | inlen = strlen (input) + 1;
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| 82 | outlen = inlen * MB_LEN_MAX + 1;
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| 83 | ob = *output = xmalloc (outlen);
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| 84 | ib = (char ICONV_CONST *) input;
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| 85 | rc = iconv (cd, &ib, &inlen, &ob, &outlen);
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| 86 | *ob = 0;
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| 87 | return rc != -1;
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| 88 | }
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| 89 | |
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| 90 |
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| 91 |
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| 92 | bool
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| 93 | string_ascii_p (const char *str)
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| 94 | {
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| 95 | const unsigned char *p = (const unsigned char *)str;
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| 96 | for (; *p; p++)
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| 97 | if (*p > 127)
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| 98 | return false;
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| 99 | return true;
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| 100 | }
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