| /* nls.c -- skeletal internationalization code. */ |
| |
| /* Copyright (C) 1996 Free Software Foundation, Inc. |
| |
| This file is part of the GNU Readline Library, a library for |
| reading lines of text with interactive input and history editing. |
| |
| The GNU Readline Library is free software; you can redistribute it |
| and/or modify it under the terms of the GNU General Public License |
| as published by the Free Software Foundation; either version 2, or |
| (at your option) any later version. |
| |
| The GNU Readline Library is distributed in the hope that it will be |
| useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| The GNU General Public License is often shipped with GNU software, and |
| is generally kept in a file called COPYING or LICENSE. If you do not |
| have a copy of the license, write to the Free Software Foundation, |
| 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
| #define READLINE_LIBRARY |
| |
| #if defined (HAVE_CONFIG_H) |
| # include <config.h> |
| #endif |
| |
| #include <sys/types.h> |
| |
| #include <stdio.h> |
| |
| #if defined (HAVE_UNISTD_H) |
| # include <unistd.h> |
| #endif /* HAVE_UNISTD_H */ |
| |
| #if defined (HAVE_STDLIB_H) |
| # include <stdlib.h> |
| #else |
| # include "ansi_stdlib.h" |
| #endif /* HAVE_STDLIB_H */ |
| |
| #if defined (HAVE_LOCALE_H) |
| # include <locale.h> |
| #endif |
| |
| #include <ctype.h> |
| |
| #include "rldefs.h" |
| #include "readline.h" |
| #include "rlshell.h" |
| #include "rlprivate.h" |
| |
| #if !defined (HAVE_SETLOCALE) |
| /* A list of legal values for the LANG or LC_CTYPE environment variables. |
| If a locale name in this list is the value for the LC_ALL, LC_CTYPE, |
| or LANG environment variable (using the first of those with a value), |
| readline eight-bit mode is enabled. */ |
| static char *legal_lang_values[] = |
| { |
| "iso88591", |
| "iso88592", |
| "iso88593", |
| "iso88594", |
| "iso88595", |
| "iso88596", |
| "iso88597", |
| "iso88598", |
| "iso88599", |
| "iso885910", |
| "koi8r", |
| 0 |
| }; |
| |
| static char *normalize_codeset PARAMS((char *)); |
| static char *find_codeset PARAMS((char *, size_t *)); |
| #endif /* !HAVE_SETLOCALE */ |
| |
| static char *_rl_get_locale_var PARAMS((const char *)); |
| |
| static char * |
| _rl_get_locale_var (v) |
| const char *v; |
| { |
| char *lspec; |
| |
| lspec = sh_get_env_value ("LC_ALL"); |
| if (lspec == 0 || *lspec == 0) |
| lspec = sh_get_env_value (v); |
| if (lspec == 0 || *lspec == 0) |
| lspec = sh_get_env_value ("LANG"); |
| |
| return lspec; |
| } |
| |
| /* Check for LC_ALL, LC_CTYPE, and LANG and use the first with a value |
| to decide the defaults for 8-bit character input and output. Returns |
| 1 if we set eight-bit mode. */ |
| int |
| _rl_init_eightbit () |
| { |
| /* If we have setlocale(3), just check the current LC_CTYPE category |
| value, and go into eight-bit mode if it's not C or POSIX. */ |
| #if defined (HAVE_SETLOCALE) |
| char *lspec, *t; |
| |
| /* Set the LC_CTYPE locale category from environment variables. */ |
| lspec = _rl_get_locale_var ("LC_CTYPE"); |
| /* Since _rl_get_locale_var queries the right environment variables, |
| we query the current locale settings with setlocale(), and, if |
| that doesn't return anything, we set lspec to the empty string to |
| force the subsequent call to setlocale() to define the `native' |
| environment. */ |
| if (lspec == 0 || *lspec == 0) |
| lspec = setlocale (LC_CTYPE, (char *)NULL); |
| if (lspec == 0) |
| lspec = ""; |
| t = setlocale (LC_CTYPE, lspec); |
| |
| if (t && *t && (t[0] != 'C' || t[1]) && (STREQ (t, "POSIX") == 0)) |
| { |
| _rl_meta_flag = 1; |
| _rl_convert_meta_chars_to_ascii = 0; |
| _rl_output_meta_chars = 1; |
| return (1); |
| } |
| else |
| return (0); |
| |
| #else /* !HAVE_SETLOCALE */ |
| char *lspec, *t; |
| int i; |
| |
| /* We don't have setlocale. Finesse it. Check the environment for the |
| appropriate variables and set eight-bit mode if they have the right |
| values. */ |
| lspec = _rl_get_locale_var ("LC_CTYPE"); |
| |
| if (lspec == 0 || (t = normalize_codeset (lspec)) == 0) |
| return (0); |
| for (i = 0; t && legal_lang_values[i]; i++) |
| if (STREQ (t, legal_lang_values[i])) |
| { |
| _rl_meta_flag = 1; |
| _rl_convert_meta_chars_to_ascii = 0; |
| _rl_output_meta_chars = 1; |
| break; |
| } |
| free (t); |
| return (legal_lang_values[i] ? 1 : 0); |
| |
| #endif /* !HAVE_SETLOCALE */ |
| } |
| |
| #if !defined (HAVE_SETLOCALE) |
| static char * |
| normalize_codeset (codeset) |
| char *codeset; |
| { |
| size_t namelen, i; |
| int len, all_digits; |
| char *wp, *retval; |
| |
| codeset = find_codeset (codeset, &namelen); |
| |
| if (codeset == 0) |
| return (codeset); |
| |
| all_digits = 1; |
| for (len = 0, i = 0; i < namelen; i++) |
| { |
| if (ISALNUM ((unsigned char)codeset[i])) |
| { |
| len++; |
| all_digits &= _rl_digit_p (codeset[i]); |
| } |
| } |
| |
| retval = (char *)malloc ((all_digits ? 3 : 0) + len + 1); |
| if (retval == 0) |
| return ((char *)0); |
| |
| wp = retval; |
| /* Add `iso' to beginning of an all-digit codeset */ |
| if (all_digits) |
| { |
| *wp++ = 'i'; |
| *wp++ = 's'; |
| *wp++ = 'o'; |
| } |
| |
| for (i = 0; i < namelen; i++) |
| if (ISALPHA ((unsigned char)codeset[i])) |
| *wp++ = _rl_to_lower (codeset[i]); |
| else if (_rl_digit_p (codeset[i])) |
| *wp++ = codeset[i]; |
| *wp = '\0'; |
| |
| return retval; |
| } |
| |
| /* Isolate codeset portion of locale specification. */ |
| static char * |
| find_codeset (name, lenp) |
| char *name; |
| size_t *lenp; |
| { |
| char *cp, *language, *result; |
| |
| cp = language = name; |
| result = (char *)0; |
| |
| while (*cp && *cp != '_' && *cp != '@' && *cp != '+' && *cp != ',') |
| cp++; |
| |
| /* This does not make sense: language has to be specified. As |
| an exception we allow the variable to contain only the codeset |
| name. Perhaps there are funny codeset names. */ |
| if (language == cp) |
| { |
| *lenp = strlen (language); |
| result = language; |
| } |
| else |
| { |
| /* Next is the territory. */ |
| if (*cp == '_') |
| do |
| ++cp; |
| while (*cp && *cp != '.' && *cp != '@' && *cp != '+' && *cp != ',' && *cp != '_'); |
| |
| /* Now, finally, is the codeset. */ |
| result = cp; |
| if (*cp == '.') |
| do |
| ++cp; |
| while (*cp && *cp != '@'); |
| |
| if (cp - result > 2) |
| { |
| result++; |
| *lenp = cp - result; |
| } |
| else |
| { |
| *lenp = strlen (language); |
| result = language; |
| } |
| } |
| |
| return result; |
| } |
| #endif /* !HAVE_SETLOCALE */ |