diff options
Diffstat (limited to 'locale/newlocale.c')
| -rw-r--r-- | locale/newlocale.c | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/locale/newlocale.c b/locale/newlocale.c new file mode 100644 index 0000000..d4e184b --- /dev/null +++ b/locale/newlocale.c @@ -0,0 +1,192 @@ +/* Return a reference to locale information record. + Copyright (C) 1996, 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include <argz.h> +#include <errno.h> +#include <locale.h> +#include <stdlib.h> + +#include "localeinfo.h" + + +/* Constant data defined in setlocale.c. */ +extern struct locale_data *const _nl_C[]; + +/* Use this when we come along an error. */ +#define ERROR_RETURN \ + do { \ + __set_errno (EINVAL); \ + return NULL; \ + } while (0) + + +__locale_t +__newlocale (int category_mask, const char *locale, __locale_t base) +{ + /* Intermediate memory for result. */ + const char *newnames[LC_ALL]; + struct __locale_t result; + __locale_t result_ptr; + char *locale_path; + size_t locale_path_len; + const char *locpath_var; + int cnt; + + /* We treat LC_ALL in the same way as if all bits were set. */ + if (category_mask == LC_ALL) + category_mask = (1 << LC_ALL) - 1; + + /* Sanity check for CATEGORY argument. */ + if ((category_mask & ~(1 << LC_ALL) - 1) != 0) + ERROR_RETURN; + + /* `newlocale' does not support asking for the locale name. */ + if (locale == NULL) + ERROR_RETURN; + + /* Allocate memory for the result. */ + if (base != NULL) + { + if (base != NULL) + return base; + + result = *base; + } + else + { + /* Fill with pointers to C locale data to . */ + for (cnt = 0; cnt < LC_ALL; ++cnt) + result.__locales[cnt] = _nl_C[cnt]; + + /* If no category is to be set we return BASE if available or a + dataset using the C locale data. */ + if (category_mask == 0) + { + result_ptr = (__locale_t) malloc (sizeof (struct __locale_t)); + *result_ptr = result; + + goto update; + } + } + + /* We perhaps really have to load some data. So we determine the + path in which to look for the data now. The environment variable + `LOCPATH' must only be used when the binary has no SUID or SGID + bit set. */ + locale_path = NULL; + locale_path_len = 0; + + locpath_var = __secure_getenv ("LOCPATH"); + if (locpath_var != NULL && locpath_var[0] != '\0') + if (__argz_create_sep (locpath_var, ':', + &locale_path, &locale_path_len) != 0) + return NULL; + + if (__argz_append (&locale_path, &locale_path_len, + LOCALE_PATH, sizeof (LOCALE_PATH)) != 0) + return NULL; + + /* Get the names for the locales we are interested in. We either + allow a composite name or a single name. */ + for (cnt = 0; cnt < LC_ALL; ++cnt) + newnames[cnt] = locale; + if (strchr (locale, ';') != NULL) + { + /* This is a composite name. Make a copy and split it up. */ + char *np = strdupa (locale); + char *cp; + + while ((cp = strchr (np, '=')) != NULL) + { + for (cnt = 0; cnt < LC_ALL; ++cnt) + if ((size_t) (cp - np) == _nl_category_name_sizes[cnt] + && memcmp (np, _nl_category_names[cnt], cp - np) == 0) + break; + + if (cnt == LC_ALL) + /* Bogus category name. */ + ERROR_RETURN; + + /* Found the category this clause sets. */ + newnames[cnt] = ++cp; + cp = strchr (cp, ';'); + if (cp != NULL) + { + /* Examine the next clause. */ + *cp = '\0'; + np = cp + 1; + } + else + /* This was the last clause. We are done. */ + break; + } + + for (cnt = 0; cnt < LC_ALL; ++cnt) + if ((category_mask & 1 << cnt) != 0 && newnames[cnt] == locale) + /* The composite name did not specify the category we need. */ + ERROR_RETURN; + } + + /* Now process all categories we are interested in. */ + for (cnt = 0; cnt < LC_ALL; ++cnt) + if ((category_mask & 1 << cnt) != 0) + { + result.__locales[cnt] = _nl_find_locale (locale_path, locale_path_len, + cnt, &newnames[cnt]); + if (result.__locales[cnt] == NULL) + return NULL; + } + + /* We successfully loaded all required data. */ + if (base == NULL) + { + /* Allocate new structure. */ + result_ptr = (__locale_t) malloc (sizeof (struct __locale_t)); + if (result_ptr == NULL) + return NULL; + + *result_ptr = result; + } + else + *(result_ptr = base) = result; + + /* Update the special members. */ + update: + { + union locale_data_value *ctypes = result_ptr->__locales[LC_CTYPE]->values; + result_ptr->__ctype_b = (const unsigned short int *) + (ctypes[_NL_ITEM_INDEX (_NL_CTYPE_CLASS)] .string); +#if BYTE_ORDER == BIG_ENDIAN + result_ptr->__ctype_tolower = (const int *) + (ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOLOWER_EB)].string); + result_ptr->__ctype_toupper = (const int *) + (ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOUPPER_EB)].string); +#elif BYTE_ORDER == LITTLE_ENDIAN + result_ptr->__ctype_tolower = (const int *) + (ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOLOWER_EL)].string); + result_ptr->__ctype_toupper = (const int *) + (ctypes[_NL_ITEM_INDEX (_NL_CTYPE_TOUPPER_EL)].string); +#else +#error bizarre byte order +#endif + } + + return result_ptr; +} |