1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2006, 2009 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
27 #include <relocatable.h>
28 #include "assertion.h"
30 #include "hash-functions.h"
36 #include <localcharset.h>
50 static char *default_encoding;
51 static struct hmapx map;
53 /* A wrapper around iconv_open */
55 create_iconv (const char* tocode, const char* fromcode)
58 struct hmapx_node *node;
59 struct converter *converter;
62 hash = hash_string (tocode, hash_string (fromcode, 0));
63 HMAPX_FOR_EACH_WITH_HASH (converter, node, hash, &map)
64 if (!strcmp (tocode, converter->tocode)
65 && !strcmp (fromcode, converter->fromcode))
66 return converter->conv;
68 converter = xmalloc (sizeof *converter);
69 converter->tocode = xstrdup (tocode);
70 converter->fromcode = xstrdup (fromcode);
71 converter->conv = iconv_open (tocode, fromcode);
72 hmapx_insert (&map, converter, hash);
74 /* I don't think it's safe to translate this string or to use messaging
75 as the convertors have not yet been set up */
76 if ( (iconv_t) -1 == converter->conv && 0 != strcmp (tocode, fromcode))
78 const int err = errno;
81 "cannot create a convertor for \"%s\" to \"%s\": %s\n",
82 fromcode, tocode, strerror (err));
85 return converter->conv;
88 /* Return a string based on TEXT converted according to HOW.
89 If length is not -1, then it must be the number of bytes in TEXT.
90 The returned string must be freed when no longer required.
93 recode_string (const char *to, const char *from,
94 const char *text, int length)
97 size_t outbufferlength;
104 /* FIXME: Need to ensure that this char is valid in the target encoding */
105 const char fallbackchar = '?';
111 length = strlen(text);
115 to = default_encoding;
118 from = default_encoding;
120 for ( outbufferlength = 1 ; outbufferlength != 0; outbufferlength <<= 1 )
121 if ( outbufferlength > length)
124 outbuf = xmalloc(outbufferlength);
127 outbytes = outbufferlength;
131 conv = create_iconv (to, from);
133 if ( (iconv_t) -1 == conv )
134 return xstrdup (text);
137 const char *ip = text;
138 result = iconv (conv, (ICONV_CONST char **) &text, &inbytes,
143 int the_error = errno;
151 *op++ = fallbackchar;
160 outbufferlength <<= 1;
161 outbuf = xmalloc (outbufferlength);
163 outbytes = outbufferlength;
168 /* should never happen */
169 fprintf (stderr, "Character conversion error: %s\n", strerror (the_error));
174 } while ( -1 == result );
178 char *const oldaddr = outbuf;
179 outbuf = xrealloc (outbuf, outbufferlength + 1);
181 op += (outbuf - oldaddr) ;
194 setlocale (LC_CTYPE, "");
196 setlocale (LC_MESSAGES, "");
199 setlocale (LC_PAPER, "");
201 bindtextdomain (PACKAGE, relocate(locale_dir));
202 textdomain (PACKAGE);
203 #endif /* ENABLE_NLS */
205 assert (default_encoding == NULL);
206 default_encoding = xstrdup (locale_charset ());
213 get_default_encoding (void)
215 return default_encoding;
219 set_default_encoding (const char *enc)
221 free (default_encoding);
222 default_encoding = xstrdup (enc);
226 /* Attempts to set the encoding from a locale name
227 returns true if successfull.
228 This function does not (should not!) alter the current locale.
231 set_encoding_from_locale (const char *loc)
236 char *tmp = xstrdup (setlocale (LC_CTYPE, NULL));
238 setlocale (LC_CTYPE, "C");
239 c_encoding = xstrdup (locale_charset ());
241 setlocale (LC_CTYPE, loc);
242 loc_encoding = xstrdup (locale_charset ());
245 if ( 0 == strcmp (loc_encoding, c_encoding))
251 setlocale (LC_CTYPE, tmp);
257 free (default_encoding);
258 default_encoding = loc_encoding;
271 struct hmapx_node *node;
272 struct converter *cvtr;
273 HMAPX_FOR_EACH (cvtr, node, &map)
275 iconv_close (cvtr->conv);
279 hmapx_destroy (&map);
281 free (default_encoding);
282 default_encoding = NULL;
288 valid_encoding (const char *enc)
290 iconv_t conv = iconv_open ("UTF8", enc);
292 if ( conv == (iconv_t) -1)
301 /* Return the system local's idea of the
302 decimal seperator character */
304 get_system_decimal (void)
308 char *ol = xstrdup (setlocale (LC_NUMERIC, NULL));
309 setlocale (LC_NUMERIC, "");
312 radix_char = nl_langinfo (RADIXCHAR)[0];
316 snprintf (buf, sizeof buf, "%f", 2.5);
321 /* We MUST leave LC_NUMERIC untouched, since it would
322 otherwise interfere with data_{in,out} */
323 setlocale (LC_NUMERIC, ol);