1 /* nls.c -- skeletal internationalization code. */
3 /* Copyright (C) 1996 Free Software Foundation, Inc.
5 This file is part of the GNU Readline Library, a library for
6 reading lines of text with interactive input and history editing.
8 The GNU Readline Library is free software; you can redistribute it
9 and/or modify it under the terms of the GNU General Public License
10 as published by the Free Software Foundation; either version 1, or
11 (at your option) any later version.
13 The GNU Readline Library is distributed in the hope that it will be
14 useful, but WITHOUT ANY WARRANTY; without even the implied warranty
15 of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 The GNU General Public License is often shipped with GNU software, and
19 is generally kept in a file called COPYING or LICENSE. If you do not
20 have a copy of the license, write to the Free Software Foundation,
21 675 Mass Ave, Cambridge, MA 02139, USA. */
22 #define READLINE_LIBRARY
24 #if defined (HAVE_CONFIG_H)
28 #include <sys/types.h>
30 #if defined (HAVE_UNISTD_H)
32 #endif /* HAVE_UNISTD_H */
34 #if defined (HAVE_STDLIB_H)
37 # include "ansi_stdlib.h"
38 #endif /* HAVE_STDLIB_H */
40 #if defined (HAVE_LOCALE_H)
48 extern int _rl_convert_meta_chars_to_ascii;
49 extern int _rl_output_meta_chars;
50 extern int _rl_meta_flag;
52 /* Functions imported from shell.c */
53 extern char *get_env_value ();
55 #if !defined (HAVE_SETLOCALE)
56 /* A list of legal values for the LANG or LC_CTYPE environment variables.
57 If a locale name in this list is the value for the LC_ALL, LC_CTYPE,
58 or LANG environment variable (using the first of those with a value),
59 readline eight-bit mode is enabled. */
60 static char *legal_lang_values[] =
77 static char *normalize_codeset ();
78 static char *find_codeset ();
79 #endif /* !HAVE_SETLOCALE */
81 /* Check for LC_ALL, LC_CTYPE, and LANG and use the first with a value
82 to decide the defaults for 8-bit character input and output. Returns
83 1 if we set eight-bit mode. */
87 /* If we have setlocale(3), just check the current LC_CTYPE category
88 value, and go into eight-bit mode if it's not C or POSIX. */
89 #if defined (HAVE_SETLOCALE)
92 /* Set the LC_CTYPE locale category from environment variables. */
93 t = setlocale (LC_CTYPE, "");
94 if (t && *t && (t[0] != 'C' || t[1]) && (STREQ (t, "POSIX") == 0))
97 _rl_convert_meta_chars_to_ascii = 0;
98 _rl_output_meta_chars = 1;
104 #else /* !HAVE_SETLOCALE */
108 /* We don't have setlocale. Finesse it. Check the environment for the
109 appropriate variables and set eight-bit mode if they have the right
111 lspec = get_env_value ("LC_ALL");
112 if (lspec == 0) lspec = get_env_value ("LC_CTYPE");
113 if (lspec == 0) lspec = get_env_value ("LANG");
114 if (lspec == 0 || (t = normalize_codeset (lspec)) == 0)
116 for (i = 0; t && legal_lang_values[i]; i++)
117 if (STREQ (t, legal_lang_values[i]))
120 _rl_convert_meta_chars_to_ascii = 0;
121 _rl_output_meta_chars = 1;
125 return (legal_lang_values[i] ? 1 : 0);
127 #endif /* !HAVE_SETLOCALE */
130 #if !defined (HAVE_SETLOCALE)
132 normalize_codeset (codeset)
139 codeset = find_codeset (codeset, &namelen);
145 for (len = 0, i = 0; i < namelen; i++)
147 if (isalnum (codeset[i]))
150 all_digits &= isdigit (codeset[i]);
154 retval = (char *)malloc ((all_digits ? 3 : 0) + len + 1);
159 /* Add `iso' to beginning of an all-digit codeset */
167 for (i = 0; i < namelen; i++)
168 if (isalpha (codeset[i]))
169 *wp++ = (isupper (codeset[i])) ? tolower (codeset[i]) : codeset[i];
170 else if (isdigit (codeset[i]))
177 /* Isolate codeset portion of locale specification. */
179 find_codeset (name, lenp)
183 char *cp, *language, *result;
185 cp = language = name;
188 while (*cp && *cp != '_' && *cp != '@' && *cp != '+' && *cp != ',')
191 /* This does not make sense: language has to be specified. As
192 an exception we allow the variable to contain only the codeset
193 name. Perhaps there are funny codeset names. */
196 *lenp = strlen (language);
201 /* Next is the territory. */
205 while (*cp && *cp != '.' && *cp != '@' && *cp != '+' && *cp != ',' && *cp != '_');
207 /* Now, finally, is the codeset. */
212 while (*cp && *cp != '@');
221 *lenp = strlen (language);
228 #endif /* !HAVE_SETLOCALE */