diff options
Diffstat (limited to 'lib/libc/locale/setlocale.c')
| -rw-r--r-- | lib/libc/locale/setlocale.c | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/lib/libc/locale/setlocale.c b/lib/libc/locale/setlocale.c new file mode 100644 index 0000000..414f58e --- /dev/null +++ b/lib/libc/locale/setlocale.c @@ -0,0 +1,234 @@ +/* + * Copyright (c) 1991, 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Paul Borman at Krystal Technologies. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#if defined(LIBC_SCCS) && !defined(lint) +static char sccsid[] = "@(#)setlocale.c 8.1 (Berkeley) 7/4/93"; +#endif /* LIBC_SCCS and not lint */ + +#include <limits.h> +#include <locale.h> +#include <rune.h> +#include <stdlib.h> +#include <string.h> + +/* + * Category names for getenv() + */ +static char *categories[_LC_LAST] = { + "LC_ALL", + "LC_COLLATE", + "LC_CTYPE", + "LC_MONETARY", + "LC_NUMERIC", + "LC_TIME", +}; + +/* + * Current locales for each category + */ +static char current_categories[_LC_LAST][32] = { + "C", + "C", + "C", + "C", + "C", + "C", +}; + +/* + * The locales we are going to try and load + */ +static char new_categories[_LC_LAST][32]; + +static char current_locale_string[_LC_LAST * 33]; +static char *PathLocale; + +static char *currentlocale __P((void)); +static char *loadlocale __P((int)); + +char * +setlocale(category, locale) + int category; + const char *locale; +{ + int found, i, len; + char *env, *r; + + if (!PathLocale && !(PathLocale = getenv("PATH_LOCALE"))) + PathLocale = _PATH_LOCALE; + + if (category < 0 || category >= _LC_LAST) + return (NULL); + + if (!locale) + return (category ? + current_categories[category] : currentlocale()); + + /* + * Default to the current locale for everything. + */ + for (i = 1; i < _LC_LAST; ++i) + (void)strcpy(new_categories[i], current_categories[i]); + + /* + * Now go fill up new_categories from the locale argument + */ + if (!*locale) { + env = getenv(categories[category]); + + if (!env) + env = getenv(categories[0]); + + if (!env) + env = getenv("LANG"); + + if (!env) + env = "C"; + + (void) strncpy(new_categories[category], env, 31); + new_categories[category][31] = 0; + if (!category) { + for (i = 1; i < _LC_LAST; ++i) { + if (!(env = getenv(categories[i]))) + env = new_categories[0]; + (void)strncpy(new_categories[i], env, 31); + new_categories[i][31] = 0; + } + } + } else if (category) { + (void)strncpy(new_categories[category], locale, 31); + new_categories[category][31] = 0; + } else { + if ((r = strchr(locale, '/')) == 0) { + for (i = 1; i < _LC_LAST; ++i) { + (void)strncpy(new_categories[i], locale, 31); + new_categories[i][31] = 0; + } + } else { + for (i = 1; r[1] == '/'; ++r); + if (!r[1]) + return (NULL); /* Hmm, just slashes... */ + do { + len = r - locale > 31 ? 31 : r - locale; + (void)strncpy(new_categories[i++], locale, len); + new_categories[i++][len] = 0; + locale = r; + while (*locale == '/') + ++locale; + while (*++r && *r != '/'); + } while (*locale); + while (i < _LC_LAST) + (void)strcpy(new_categories[i], + new_categories[i-1]); + } + } + + if (category) + return (loadlocale(category)); + + found = 0; + for (i = 1; i < _LC_LAST; ++i) + if (loadlocale(i) != NULL) + found = 1; + if (found) + return (currentlocale()); + return (NULL); +} + +static char * +currentlocale() +{ + int i; + + (void)strcpy(current_locale_string, current_categories[1]); + + for (i = 2; i < _LC_LAST; ++i) + if (strcmp(current_categories[1], current_categories[i])) { + (void)snprintf(current_locale_string, + sizeof(current_locale_string), "%s/%s/%s/%s/%s", + current_categories[1], current_categories[2], + current_categories[3], current_categories[4], + current_categories[5]); + break; + } + return (current_locale_string); +} + +static char * +loadlocale(category) + int category; +{ + char name[PATH_MAX]; + + if (strcmp(new_categories[category], + current_categories[category]) == 0) + return (current_categories[category]); + + if (category == LC_CTYPE) { + if (setrunelocale(new_categories[LC_CTYPE])) + return (NULL); + (void)strcpy(current_categories[LC_CTYPE], + new_categories[LC_CTYPE]); + return (current_categories[LC_CTYPE]); + } + + if (!strcmp(new_categories[category], "C") || + !strcmp(new_categories[category], "POSIX")) { + + /* + * Some day this will need to reset the locale to the default + * C locale. Since we have no way to change them as of yet, + * there is no need to reset them. + */ + (void)strcpy(current_categories[category], + new_categories[category]); + return (current_categories[category]); + } + + /* + * Some day we will actually look at this file. + */ + (void)snprintf(name, sizeof(name), "%s/%s/%s", + PathLocale, new_categories[category], categories[category]); + + switch (category) { + case LC_COLLATE: + case LC_MONETARY: + case LC_NUMERIC: + case LC_TIME: + return (NULL); + } +} |
