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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:51:56 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 14:51:56 +0000 |
commit | c77311c90aa045796b3adcd021e69901022f4649 (patch) | |
tree | 3a6c4cc9271c6f7f7c24feff0d1aea286eed0a06 /nls.c | |
parent | Initial commit. (diff) | |
download | readline-c77311c90aa045796b3adcd021e69901022f4649.tar.xz readline-c77311c90aa045796b3adcd021e69901022f4649.zip |
Adding upstream version 8.2.upstream/8.2upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | nls.c | 344 |
1 files changed, 344 insertions, 0 deletions
@@ -0,0 +1,344 @@ +/* nls.c -- skeletal internationalization code. */ + +/* Copyright (C) 1996-2022 Free Software Foundation, Inc. + + This file is part of the GNU Readline Library (Readline), a library + for reading lines of text with interactive input and history editing. + + Readline 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 3 of the License, or + (at your option) any later version. + + Readline 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. + + You should have received a copy of the GNU General Public License + along with Readline. If not, see <http://www.gnu.org/licenses/>. +*/ + +#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 + +#if defined (HAVE_LANGINFO_CODESET) +# include <langinfo.h> +#endif + +#include <ctype.h> + +#include "rldefs.h" +#include "readline.h" +#include "rlshell.h" +#include "rlprivate.h" +#include "xmalloc.h" + +static int utf8locale (char *); + +#define RL_DEFAULT_LOCALE "C" +static char *_rl_current_locale = 0; + +#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", + "utf8", + 0 +}; + +static char *normalize_codeset (char *); +#endif /* !HAVE_SETLOCALE */ + +static char *find_codeset (char *, size_t *); + +static char *_rl_get_locale_var (const char *); + +static char * +_rl_get_locale_var (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; +} + +static int +utf8locale (char *lspec) +{ + char *cp; + size_t len; + +#if HAVE_LANGINFO_CODESET + cp = nl_langinfo (CODESET); + return (STREQ (cp, "UTF-8") || STREQ (cp, "utf8")); +#else + cp = find_codeset (lspec, &len); + + if (cp == 0 || len < 4 || len > 5) + return 0; + return ((len == 5) ? strncmp (cp, "UTF-8", len) == 0 : strncmp (cp, "utf8", 4) == 0); +#endif +} + +/* Query the right environment variables and call setlocale() to initialize + the C library locale settings. */ +char * +_rl_init_locale (void) +{ + char *ret, *lspec; + + /* 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 defined (HAVE_SETLOCALE) + if (lspec == 0 || *lspec == 0) + lspec = setlocale (LC_CTYPE, (char *)NULL); + if (lspec == 0) + lspec = ""; + ret = setlocale (LC_CTYPE, lspec); /* ok, since it does not change locale */ +#else + ret = (lspec == 0 || *lspec == 0) ? RL_DEFAULT_LOCALE : lspec; +#endif + + _rl_utf8locale = (ret && *ret) ? utf8locale (ret) : 0; + + _rl_current_locale = savestring (ret); + return ret; +} + +/* If we have setlocale(3), just check the current LC_CTYPE category + value (passed as LOCALESTR), and go into eight-bit mode if it's not "C" + or "POSIX". If FORCE is non-zero, we reset the locale variables to values + appropriate for the C locale if the locale is "C" or "POSIX". FORCE is 0 + when this is called from _rl_init_eightbit, since we're modifying the + default initial values and don't need to change anything else. If we + don't have setlocale(3), we check the codeset portion of LOCALESTR against + a set of known values and go into eight-bit mode if it matches one of those. + Returns 1 if we set eight-bit (multibyte) mode. */ +static int +_rl_set_localevars (char *localestr, int force) +{ +#if defined (HAVE_SETLOCALE) + if (localestr && *localestr && (localestr[0] != 'C' || localestr[1]) && (STREQ (localestr, "POSIX") == 0)) + { + _rl_meta_flag = 1; + _rl_convert_meta_chars_to_ascii = 0; + _rl_output_meta_chars = 1; + return (1); + } + else if (force) + { + /* Default "C" locale settings. */ + _rl_meta_flag = 0; + _rl_convert_meta_chars_to_ascii = 1; + _rl_output_meta_chars = 0; + return (0); + } + else + return (0); + +#else /* !HAVE_SETLOCALE */ + char *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. */ + if (localestr == 0 || (t = normalize_codeset (localestr)) == 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; + } + + if (force && legal_lang_values[i] == 0) /* didn't find it */ + { + /* Default "C" locale settings. */ + _rl_meta_flag = 0; + _rl_convert_meta_chars_to_ascii = 1; + _rl_output_meta_chars = 0; + } + + _rl_utf8locale = *t ? STREQ (t, "utf8") : 0; + + xfree (t); + return (legal_lang_values[i] ? 1 : 0); +#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 (void) +{ + char *t, *ol; + + ol = _rl_current_locale; + t = _rl_init_locale (); /* resets _rl_current_locale, returns static pointer */ + xfree (ol); + + return (_rl_set_localevars (t, 0)); +} + +#if !defined (HAVE_SETLOCALE) +static char * +normalize_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; +} +#endif /* !HAVE_SETLOCALE */ + +/* Isolate codeset portion of locale specification. */ +static char * +find_codeset (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; +} + +void +_rl_reset_locale (void) +{ + char *ol, *nl; + + /* This should not be NULL; _rl_init_eightbit sets it on the first call to + readline() or rl_initialize(). */ + ol = _rl_current_locale; + nl = _rl_init_locale (); /* resets _rl_current_locale */ + + if ((ol == 0 && nl) || (ol && nl && (STREQ (ol, nl) == 0))) + (void)_rl_set_localevars (nl, 1); + + xfree (ol); +} |