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;
61 hash = hash_string (tocode, hash_string (fromcode, 0));
62 HMAPX_FOR_EACH_WITH_HASH (converter, node, hash, &map)
63 if (!strcmp (tocode, converter->tocode)
64 && !strcmp (fromcode, converter->fromcode))
65 return converter->conv;
67 converter = xmalloc (sizeof *converter);
68 converter->tocode = xstrdup (tocode);
69 converter->fromcode = xstrdup (fromcode);
70 converter->conv = iconv_open (tocode, fromcode);
71 hmapx_insert (&map, converter, hash);
73 /* I don't think it's safe to translate this string or to use messaging
74 as the convertors have not yet been set up */
75 if ( (iconv_t) -1 == converter->conv && 0 != strcmp (tocode, fromcode))
77 const int err = errno;
80 "cannot create a convertor for \"%s\" to \"%s\": %s\n",
81 fromcode, tocode, strerror (err));
84 return converter->conv;
87 /* Return a string based on TEXT converted according to HOW.
88 If length is not -1, then it must be the number of bytes in TEXT.
89 The returned string must be freed when no longer required.
92 recode_string (const char *to, const char *from,
93 const char *text, int length)
96 size_t outbufferlength;
103 /* FIXME: Need to ensure that this char is valid in the target encoding */
104 const char fallbackchar = '?';
110 length = strlen(text);
114 to = default_encoding;
117 from = default_encoding;
119 for ( outbufferlength = 1 ; outbufferlength != 0; outbufferlength <<= 1 )
120 if ( outbufferlength > length)
123 outbuf = xmalloc(outbufferlength);
126 outbytes = outbufferlength;
130 conv = create_iconv (to, from);
132 if ( (iconv_t) -1 == conv )
133 return xstrdup (text);
136 const char *ip = text;
137 result = iconv (conv, (ICONV_CONST char **) &text, &inbytes,
142 int the_error = errno;
150 *op++ = fallbackchar;
159 outbufferlength <<= 1;
160 outbuf = xmalloc (outbufferlength);
162 outbytes = outbufferlength;
167 /* should never happen */
168 fprintf (stderr, "Character conversion error: %s\n", strerror (the_error));
173 } while ( -1 == result );
177 char *const oldaddr = outbuf;
178 outbuf = xrealloc (outbuf, outbufferlength + 1);
180 op += (outbuf - oldaddr) ;
193 setlocale (LC_CTYPE, "");
195 setlocale (LC_MESSAGES, "");
198 setlocale (LC_PAPER, "");
200 bindtextdomain (PACKAGE, relocate(locale_dir));
201 textdomain (PACKAGE);
202 #endif /* ENABLE_NLS */
204 assert (default_encoding == NULL);
205 default_encoding = xstrdup (locale_charset ());
212 get_default_encoding (void)
214 return default_encoding;
218 set_default_encoding (const char *enc)
220 free (default_encoding);
221 default_encoding = xstrdup (enc);
225 /* Attempts to set the encoding from a locale name
226 returns true if successfull.
227 This function does not (should not!) alter the current locale.
230 set_encoding_from_locale (const char *loc)
235 char *tmp = xstrdup (setlocale (LC_CTYPE, NULL));
237 setlocale (LC_CTYPE, "C");
238 c_encoding = xstrdup (locale_charset ());
240 setlocale (LC_CTYPE, loc);
241 loc_encoding = xstrdup (locale_charset ());
244 if ( 0 == strcmp (loc_encoding, c_encoding))
250 setlocale (LC_CTYPE, tmp);
256 free (default_encoding);
257 default_encoding = loc_encoding;
270 struct hmapx_node *node;
271 struct converter *cvtr;
272 HMAPX_FOR_EACH (cvtr, node, &map)
274 iconv_close (cvtr->conv);
278 hmapx_destroy (&map);
280 free (default_encoding);
281 default_encoding = NULL;
287 valid_encoding (const char *enc)
289 iconv_t conv = iconv_open ("UTF8", enc);
291 if ( conv == (iconv_t) -1)
300 /* Return the system local's idea of the
301 decimal seperator character */
303 get_system_decimal (void)
307 char *ol = xstrdup (setlocale (LC_NUMERIC, NULL));
308 setlocale (LC_NUMERIC, "");
311 radix_char = nl_langinfo (RADIXCHAR)[0];
315 snprintf (buf, sizeof buf, "%f", 2.5);
320 /* We MUST leave LC_NUMERIC untouched, since it would
321 otherwise interfere with data_{in,out} */
322 setlocale (LC_NUMERIC, ol);