/* 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 */ /* 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 *t; /* Set the LC_CTYPE locale category from environment variables. */ t = setlocale (LC_CTYPE, ""); 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 = sh_get_env_value ("LC_ALL"); if (lspec == 0) lspec = sh_get_env_value ("LC_CTYPE"); if (lspec == 0) lspec = sh_get_env_value ("LANG"); 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 */