Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 534 insertions, 0 deletions

diff --git a/REORG.TODO/locale/setlocale.c b/REORG.TODO/locale/setlocale.c
new file mode 100644
index 0000000000..19acc4b2c7
--- /dev/null
+++ b/REORG.TODO/locale/setlocale.c
@@ -0,0 +1,534 @@
+/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <alloca.h>
+#include <argz.h>
+#include <errno.h>
+#include <libc-lock.h>
+#include <locale.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "localeinfo.h"
+
+#ifdef NL_CURRENT_INDIRECT
+
+/* For each category declare a special external symbol
+   _nl_current_CATEGORY_used with a weak reference.
+   This symbol will is defined in lc-CATEGORY.c and will be linked in
+   if anything uses _nl_current_CATEGORY (also defined in that module).
+   Also use a weak reference for the _nl_current_CATEGORY thread variable.  */
+
+# define DEFINE_CATEGORY(category, category_name, items, a) \
+    extern char _nl_current_##category##_used; \
+    weak_extern (_nl_current_##category##_used) \
+    weak_extern (_nl_current_##category)
+# include "categories.def"
+# undef	DEFINE_CATEGORY
+
+/* Now define a table of flags based on those special weak symbols' values.
+   _nl_current_used[CATEGORY] will be zero if _nl_current_CATEGORY is not
+   linked in.  */
+static char *const _nl_current_used[] =
+  {
+# define DEFINE_CATEGORY(category, category_name, items, a) \
+    [category] = &_nl_current_##category##_used,
+# include "categories.def"
+# undef	DEFINE_CATEGORY
+  };
+
+# define CATEGORY_USED(category)	(_nl_current_used[category] != 0)
+
+#else
+
+/* The shared library always loads all the categories,
+   and the current global settings are kept in _nl_global_locale.  */
+
+# define CATEGORY_USED(category)	(1)
+
+#endif
+
+
+/* Define an array of category names (also the environment variable names).  */
+const union catnamestr_t _nl_category_names attribute_hidden =
+  {
+    {
+#define DEFINE_CATEGORY(category, category_name, items, a) \
+      category_name,
+#include "categories.def"
+#undef DEFINE_CATEGORY
+    }
+  };
+
+const uint8_t _nl_category_name_idxs[__LC_LAST] attribute_hidden =
+  {
+#define DEFINE_CATEGORY(category, category_name, items, a) \
+    [category] = offsetof (union catnamestr_t, CATNAMEMF (__LINE__)),
+#include "categories.def"
+#undef DEFINE_CATEGORY
+  };
+
+/* An array of their lengths, for convenience.  */
+const uint8_t _nl_category_name_sizes[] attribute_hidden =
+  {
+#define DEFINE_CATEGORY(category, category_name, items, a) \
+    [category] = sizeof (category_name) - 1,
+#include "categories.def"
+#undef	DEFINE_CATEGORY
+    [LC_ALL] = sizeof ("LC_ALL") - 1
+  };
+
+
+#ifdef NL_CURRENT_INDIRECT
+# define WEAK_POSTLOAD(postload) weak_extern (postload)
+#else
+# define WEAK_POSTLOAD(postload) /* Need strong refs in static linking.  */
+#endif
+
+/* Declare the postload functions used below.  */
+#undef	NO_POSTLOAD
+#define NO_POSTLOAD _nl_postload_ctype /* Harmless thing known to exist.  */
+#define DEFINE_CATEGORY(category, category_name, items, postload) \
+extern void postload (void); WEAK_POSTLOAD (postload)
+#include "categories.def"
+#undef	DEFINE_CATEGORY
+#undef	NO_POSTLOAD
+
+/* Define an array indexed by category of postload functions to call after
+   loading and installing that category's data.  */
+static void (*const _nl_category_postload[]) (void) =
+  {
+#define DEFINE_CATEGORY(category, category_name, items, postload) \
+    [category] = postload,
+#include "categories.def"
+#undef	DEFINE_CATEGORY
+  };
+
+
+/* Lock for protecting global data.  */
+__libc_rwlock_define_initialized (, __libc_setlocale_lock attribute_hidden)
+
+/* Defined in loadmsgcat.c.  */
+extern int _nl_msg_cat_cntr;
+
+
+/* Use this when we come along an error.  */
+#define ERROR_RETURN							      \
+  do {									      \
+    __set_errno (EINVAL);						      \
+    return NULL;							      \
+  } while (0)
+
+
+/* Construct a new composite name.  */
+static char *
+new_composite_name (int category, const char *newnames[__LC_LAST])
+{
+  size_t last_len = 0;
+  size_t cumlen = 0;
+  int i;
+  char *new, *p;
+  int same = 1;
+
+  for (i = 0; i < __LC_LAST; ++i)
+    if (i != LC_ALL)
+      {
+	const char *name = (category == LC_ALL ? newnames[i] :
+			    category == i ? newnames[0] :
+			    _nl_global_locale.__names[i]);
+	last_len = strlen (name);
+	cumlen += _nl_category_name_sizes[i] + 1 + last_len + 1;
+	if (same && name != newnames[0] && strcmp (name, newnames[0]) != 0)
+	  same = 0;
+      }
+
+  if (same)
+    {
+      /* All the categories use the same name.  */
+      if (strcmp (newnames[0], _nl_C_name) == 0
+	  || strcmp (newnames[0], _nl_POSIX_name) == 0)
+	return (char *) _nl_C_name;
+
+      new = malloc (last_len + 1);
+
+      return new == NULL ? NULL : memcpy (new, newnames[0], last_len + 1);
+    }
+
+  new = malloc (cumlen);
+  if (new == NULL)
+    return NULL;
+  p = new;
+  for (i = 0; i < __LC_LAST; ++i)
+    if (i != LC_ALL)
+      {
+	/* Add "CATEGORY=NAME;" to the string.  */
+	const char *name = (category == LC_ALL ? newnames[i] :
+			    category == i ? newnames[0] :
+			    _nl_global_locale.__names[i]);
+	p = __stpcpy (p, _nl_category_names.str + _nl_category_name_idxs[i]);
+	*p++ = '=';
+	p = __stpcpy (p, name);
+	*p++ = ';';
+      }
+  p[-1] = '\0';		/* Clobber the last ';'.  */
+  return new;
+}
+
+
+/* Put NAME in _nl_global_locale.__names.  */
+static void
+setname (int category, const char *name)
+{
+  if (_nl_global_locale.__names[category] == name)
+    return;
+
+  if (_nl_global_locale.__names[category] != _nl_C_name)
+    free ((char *) _nl_global_locale.__names[category]);
+
+  _nl_global_locale.__names[category] = name;
+}
+
+/* Put DATA in *_nl_current[CATEGORY].  */
+static void
+setdata (int category, struct __locale_data *data)
+{
+  if (CATEGORY_USED (category))
+    {
+      _nl_global_locale.__locales[category] = data;
+      if (_nl_category_postload[category])
+	(*_nl_category_postload[category]) ();
+    }
+}
+
+char *
+setlocale (int category, const char *locale)
+{
+  char *locale_path;
+  size_t locale_path_len;
+  const char *locpath_var;
+  char *composite;
+
+  /* Sanity check for CATEGORY argument.  */
+  if (__builtin_expect (category, 0) < 0
+      || __builtin_expect (category, 0) >= __LC_LAST)
+    ERROR_RETURN;
+
+  /* Does user want name of current locale?  */
+  if (locale == NULL)
+    return (char *) _nl_global_locale.__names[category];
+
+  /* Protect global data.  */
+  __libc_rwlock_wrlock (__libc_setlocale_lock);
+
+  if (strcmp (locale, _nl_global_locale.__names[category]) == 0)
+    {
+      /* Changing to the same thing.  */
+      __libc_rwlock_unlock (__libc_setlocale_lock);
+
+      return (char *) _nl_global_locale.__names[category];
+    }
+
+  /* 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.  If using the default path, we tell _nl_find_locale
+     by passing null and it can check the canonical locale archive.  */
+  locale_path = NULL;
+  locale_path_len = 0;
+
+  locpath_var = getenv ("LOCPATH");
+  if (locpath_var != NULL && locpath_var[0] != '\0')
+    {
+      if (__argz_create_sep (locpath_var, ':',
+			     &locale_path, &locale_path_len) != 0
+	  || __argz_add_sep (&locale_path, &locale_path_len,
+			     _nl_default_locale_path, ':') != 0)
+	{
+	  __libc_rwlock_unlock (__libc_setlocale_lock);
+	  return NULL;
+	}
+    }
+
+  if (category == LC_ALL)
+    {
+      /* The user wants to set all categories.  The desired locales
+	 for the individual categories can be selected by using a
+	 composite locale name.  This is a semi-colon separated list
+	 of entries of the form `CATEGORY=VALUE'.  */
+      const char *newnames[__LC_LAST];
+      struct __locale_data *newdata[__LC_LAST];
+      /* Copy of the locale argument, for in-place splitting.  */
+      char *locale_copy = NULL;
+
+      /* Set all name pointers to the argument name.  */
+      for (category = 0; category < __LC_LAST; ++category)
+	if (category != LC_ALL)
+	  newnames[category] = (char *) locale;
+
+      if (__glibc_unlikely (strchr (locale, ';') != NULL))
+	{
+	  /* This is a composite name.  Make a copy and split it up.  */
+	  locale_copy = __strdup (locale);
+	  if (__glibc_unlikely (locale_copy == NULL))
+	    {
+	      __libc_rwlock_unlock (__libc_setlocale_lock);
+	      return NULL;
+	    }
+	  char *np = locale_copy;
+	  char *cp;
+	  int cnt;
+
+	  while ((cp = strchr (np, '=')) != NULL)
+	    {
+	      for (cnt = 0; cnt < __LC_LAST; ++cnt)
+		if (cnt != LC_ALL
+		    && (size_t) (cp - np) == _nl_category_name_sizes[cnt]
+		    && (memcmp (np, (_nl_category_names.str
+				     + _nl_category_name_idxs[cnt]), cp - np)
+			== 0))
+		  break;
+
+	      if (cnt == __LC_LAST)
+		{
+		error_return:
+		  __libc_rwlock_unlock (__libc_setlocale_lock);
+		  free (locale_copy);
+
+		  /* 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_LAST; ++cnt)
+	    if (cnt != LC_ALL && newnames[cnt] == locale)
+	      /* The composite name did not specify all categories.  */
+	      goto error_return;
+	}
+
+      /* Load the new data for each category.  */
+      while (category-- > 0)
+	if (category != LC_ALL)
+	  {
+	    newdata[category] = _nl_find_locale (locale_path, locale_path_len,
+						 category,
+						 &newnames[category]);
+
+	    if (newdata[category] == NULL)
+	      {
+#ifdef NL_CURRENT_INDIRECT
+		if (newnames[category] == _nl_C_name)
+		  /* Null because it's the weak value of _nl_C_LC_FOO.  */
+		  continue;
+#endif
+		break;
+	      }
+
+	    /* We must not simply free a global locale since we have
+	       no control over the usage.  So we mark it as
+	       un-deletable.  And yes, the 'if' is needed, the data
+	       might be in read-only memory.  */
+	    if (newdata[category]->usage_count != UNDELETABLE)
+	      newdata[category]->usage_count = UNDELETABLE;
+
+	    /* Make a copy of locale name.  */
+	    if (newnames[category] != _nl_C_name)
+	      {
+		if (strcmp (newnames[category],
+			    _nl_global_locale.__names[category]) == 0)
+		  newnames[category] = _nl_global_locale.__names[category];
+		else
+		  {
+		    newnames[category] = __strdup (newnames[category]);
+		    if (newnames[category] == NULL)
+		      break;
+		  }
+	      }
+	  }
+
+      /* Create new composite name.  */
+      composite = (category >= 0
+		   ? NULL : new_composite_name (LC_ALL, newnames));
+      if (composite != NULL)
+	{
+	  /* Now we have loaded all the new data.  Put it in place.  */
+	  for (category = 0; category < __LC_LAST; ++category)
+	    if (category != LC_ALL)
+	      {
+		setdata (category, newdata[category]);
+		setname (category, newnames[category]);
+	      }
+	  setname (LC_ALL, composite);
+
+	  /* We successfully loaded a new locale.  Let the message catalog
+	     functions know about this.  */
+	  ++_nl_msg_cat_cntr;
+	}
+      else
+	for (++category; category < __LC_LAST; ++category)
+	  if (category != LC_ALL && newnames[category] != _nl_C_name
+	      && newnames[category] != _nl_global_locale.__names[category])
+	    free ((char *) newnames[category]);
+
+      /* Critical section left.  */
+      __libc_rwlock_unlock (__libc_setlocale_lock);
+
+      /* Free the resources.  */
+      free (locale_path);
+      free (locale_copy);
+
+      return composite;
+    }
+  else
+    {
+      struct __locale_data *newdata = NULL;
+      const char *newname[1] = { locale };
+
+      if (CATEGORY_USED (category))
+	{
+	  /* Only actually load the data if anything will use it.  */
+	  newdata = _nl_find_locale (locale_path, locale_path_len, category,
+				     &newname[0]);
+	  if (newdata == NULL)
+	    goto abort_single;
+
+	  /* We must not simply free a global locale since we have no
+	     control over the usage.  So we mark it as un-deletable.
+
+	     Note: do not remove the `if', it's necessary to cope with
+	     the builtin locale data.  */
+	  if (newdata->usage_count != UNDELETABLE)
+	    newdata->usage_count = UNDELETABLE;
+	}
+
+      /* Make a copy of locale name.  */
+      if (newname[0] != _nl_C_name)
+	{
+	  newname[0] = __strdup (newname[0]);
+	  if (newname[0] == NULL)
+	    goto abort_single;
+	}
+
+      /* Create new composite name.  */
+      composite = new_composite_name (category, newname);
+      if (composite == NULL)
+	{
+	  if (newname[0] != _nl_C_name)
+	    free ((char *) newname[0]);
+
+	  /* Say that we don't have any data loaded.  */
+	abort_single:
+	  newname[0] = NULL;
+	}
+      else
+	{
+	  if (CATEGORY_USED (category))
+	    setdata (category, newdata);
+
+	  setname (category, newname[0]);
+	  setname (LC_ALL, composite);
+
+	  /* We successfully loaded a new locale.  Let the message catalog
+	     functions know about this.  */
+	  ++_nl_msg_cat_cntr;
+	}
+
+      /* Critical section left.  */
+      __libc_rwlock_unlock (__libc_setlocale_lock);
+
+      /* Free the resources (the locale path variable.  */
+      free (locale_path);
+
+      return (char *) newname[0];
+    }
+}
+libc_hidden_def (setlocale)
+
+static void __libc_freeres_fn_section
+free_category (int category,
+	       struct __locale_data *here, struct __locale_data *c_data)
+{
+  struct loaded_l10nfile *runp = _nl_locale_file_list[category];
+
+  /* If this category is already "C" don't do anything.  */
+  if (here != c_data)
+    {
+      /* We have to be prepared that sometime later we still
+	 might need the locale information.  */
+      setdata (category, c_data);
+      setname (category, _nl_C_name);
+    }
+
+  while (runp != NULL)
+    {
+      struct loaded_l10nfile *curr = runp;
+      struct __locale_data *data = (struct __locale_data *) runp->data;
+
+      if (data != NULL && data != c_data)
+	_nl_unload_locale (data);
+      runp = runp->next;
+      free ((char *) curr->filename);
+      free (curr);
+    }
+}
+
+/* This is called from iconv/gconv_db.c's free_mem, as locales must
+   be freed before freeing gconv steps arrays.  */
+void __libc_freeres_fn_section
+_nl_locale_subfreeres (void)
+{
+#ifdef NL_CURRENT_INDIRECT
+  /* We don't use the loop because we want to have individual weak
+     symbol references here.  */
+# define DEFINE_CATEGORY(category, category_name, items, a)		      \
+  if (CATEGORY_USED (category))						      \
+    {									      \
+      extern struct __locale_data _nl_C_##category;			      \
+      weak_extern (_nl_C_##category)					      \
+      free_category (category, *_nl_current_##category, &_nl_C_##category);   \
+    }
+# include "categories.def"
+# undef	DEFINE_CATEGORY
+#else
+  int category;
+
+  for (category = 0; category < __LC_LAST; ++category)
+    if (category != LC_ALL)
+      free_category (category, _NL_CURRENT_DATA (category),
+		     _nl_C_locobj.__locales[category]);
+#endif
+
+  setname (LC_ALL, _nl_C_name);
+
+  /* This frees the data structures associated with the locale archive.
+     The locales from the archive are not in the file list, so we have
+     not called _nl_unload_locale on them above.  */
+  _nl_archive_subfreeres ();
+}