1 /* Get descriptor for character set conversion.
2 Copyright (C) 1997-2014 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
27 #include <gconv_int.h>
28 #include "gconv_charset.h"
32 iconv_open (const char *tocode
, const char *fromcode
)
34 /* Normalize the name. We remove all characters beside alpha-numeric,
35 '_', '-', '/', '.', and ':'. */
36 size_t tocode_len
= strlen (tocode
) + 3;
38 bool tocode_usealloca
= __libc_use_alloca (tocode_len
);
40 tocode_conv
= (char *) alloca (tocode_len
);
43 tocode_conv
= (char *) malloc (tocode_len
);
44 if (tocode_conv
== NULL
)
47 strip (tocode_conv
, tocode
);
48 tocode
= (tocode_conv
[2] == '\0' && tocode
[0] != '\0'
49 ? upstr (tocode_conv
, tocode
) : tocode_conv
);
51 size_t fromcode_len
= strlen (fromcode
) + 3;
53 bool fromcode_usealloca
= __libc_use_alloca (fromcode_len
);
54 if (fromcode_usealloca
)
55 fromcode_conv
= (char *) alloca (fromcode_len
);
58 fromcode_conv
= (char *) malloc (fromcode_len
);
59 if (fromcode_conv
== NULL
)
61 if (! tocode_usealloca
)
66 strip (fromcode_conv
, fromcode
);
67 fromcode
= (fromcode_conv
[2] == '\0' && fromcode
[0] != '\0'
68 ? upstr (fromcode_conv
, fromcode
) : fromcode_conv
);
71 int res
= __gconv_open (tocode
, fromcode
, &cd
, 0);
73 if (! fromcode_usealloca
)
75 if (! tocode_usealloca
)
78 if (__builtin_expect (res
, __GCONV_OK
) != __GCONV_OK
)
80 /* We must set the error number according to the specs. */
81 if (res
== __GCONV_NOCONV
|| res
== __GCONV_NODB
)