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-rw-r--r--locale/newlocale.c192
1 files changed, 192 insertions, 0 deletions
diff --git a/locale/newlocale.c b/locale/newlocale.c
new file mode 100644
index 0000000000..d4e184b921
--- /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;
+}