Update.

2000-06-19  Ulrich Drepper  <drepper@redhat.com>

	* iconv/gconv.h (__gconv_trans_fct): Add new parameter.
	General namespace cleanup.
	(struct __gconv_trans_data): Add next field.
	(struct __gconv_step_data): Make __trans a pointer.
	* iconv/gconv_conf.c: Split out code to find gconv directories from
	__gconv_read_conf in new functions.
	* iconv/gconv_int.h: Define new data structure and declare new
	functions for handling of gconv directory list.
	* iconv/gconv_open.c: Allow more than one error handling step being
	used.  Call function to load error handling module if it is none
	of the builtin transformations.
	* iconv/gconv_close.c: Add code to free transliteration data.
	* iconv/gconv_trans.c: Add functions to load and unload modules
	implementing transliteration etc.
	* iconv/skeleton.c: Call all context functions now that more than
	one module is allowed.
	* iconv/loop.c (STANDARD_ERR_HANDLING): New macro.
	* iconv/gconv_simple.c: Use STANDARD_ERR_HANDLING macro for places
	where the full error handling using transliteration is needed.
	* iconvdata/8bit-gap.c: Likewise.
	* iconvdata/8bit-generic.c: Likewise.
	* iconvdata/ansi_x3.110.c: Likewise.
	* iconvdata/big5.c: Likewise.
	* iconvdata/big5hkscs.c: Likewise.
	* iconvdata/euc-cn.c: Likewise.
	* iconvdata/euc-jp.c: Likewise.
	* iconvdata/euc-kr.c: Likewise.
	* iconvdata/euc-tw.c: Likewise.
	* iconvdata/gbgbk.c: Likewise.
	* iconvdata/gbk.c: Likewise.
	* iconvdata/iso-2022-cn.c: Likewise.
	* iconvdata/iso-2022-jp.c: Likewise.
	* iconvdata/iso-2022-kr.c: Likewise.
	* iconvdata/iso646.c: Likewise.
	* iconvdata/iso8859-1.c: Likewise.
	* iconvdata/iso_6937-2.c: Likewise.
	* iconvdata/iso_6937.c: Likewise.
	* iconvdata/johab.c: Likewise.
	* iconvdata/sjis.c: Likewise.
	* iconvdata/t.61.c: Likewise.
	* iconvdata/uhc.c: Likewise.
	* iconvdata/unicode.c: Likewise.
	* iconvdata/utf-16.c: Likewise.
	* libio/iofwide.c: Reset __trans member of __gconv_trans_data
	structure correctly after last change.
	* wcsmbs/btowc.c: Likewise.
	* wcsmbs/mbrtowc.c: Likewise.
	* wcsmbs/mbsnrtowcs.c: Likewise.
	* wcsmbs/mbsrtowcs.c: Likewise.
	* wcsmbs/wcrtomb.c: Likewise.
	* wcsmbs/wcsnrtombs.c: Likewise.
	* wcsmbs/wcsrtombs.c: Likewise.
	* wcsmbs/wctob.c: Likewise.

	* localedata/Makefile: Set -Wno-format for some files since gcc does
	not know all the format specifiers.

2000-06-18  Ulrich Drepper  <drepper@redhat.com>

	* locale/loadlocale.c (_nl_unload_locale): Remove a bit of
	unneeded code.
	* locale/lc-time.c (_nl_init_era_entries): Likewise.

9 files changed, 586 insertions, 165 deletions

diff --git a/iconv/gconv.h b/iconv/gconv.h
index 0164b62..50458e2 100644
--- a/iconv/gconv.h
+++ b/iconv/gconv.h
@@ -76,21 +76,22 @@ typedef void (*__gconv_end_fct) (struct __gconv_step *);
 
 
 /* Type of a transliteration/transscription function.  */
-typedef int (*__gconv_trans_fct) (struct __gconv_step *step,
-				  struct __gconv_step_data *step_data,
+typedef int (*__gconv_trans_fct) (struct __gconv_step *,
+				  struct __gconv_step_data *, void *,
 				  __const unsigned char *,
 				  __const unsigned char **,
 				  __const unsigned char *, unsigned char **,
 				  size_t *);
 
 /* Function to call to provide transliteration module with context.  */
-typedef int (*__gconv_trans_context_fct) (struct __gconv_trans_data *data,
+typedef int (*__gconv_trans_context_fct) (struct __gconv_trans_data *,
 					  __const unsigned char *,
 					  __const unsigned char *,
 					  unsigned char *, unsigned char *);
 
 /* Function to query module about supported encoded character sets.  */
-typedef int (*__gconv_trans_query_fct) (__const char **, size_t *);
+typedef int (*__gconv_trans_query_fct) (__const char *, __const char ***,
+					size_t *);
 
 /* Constructor and destructor for local data for transliteration.  */
 typedef int (*__gconv_trans_init_fct) (void **, const char *);
@@ -103,6 +104,7 @@ struct __gconv_trans_data
   __gconv_trans_context_fct __trans_context_fct;
   __gconv_trans_end_fct __trans_end_fct;
   void *__data;
+  struct __gconv_trans_data *__next;
 };
 
 
@@ -158,7 +160,7 @@ struct __gconv_step_data
 			   any module; always use STATEP!  */
 
   /* Transliteration information.  */
-  struct __gconv_trans_data __trans;
+  struct __gconv_trans_data *__trans;
 };
 
 
diff --git a/iconv/gconv_close.c b/iconv/gconv_close.c
index 79dcb0b..002e2c4 100644
--- a/iconv/gconv_close.c
+++ b/iconv/gconv_close.c
@@ -38,6 +38,20 @@ __gconv_close (__gconv_t cd)
   drunp = cd->__data;
   do
     {
+      struct __gconv_trans_data *transp;
+
+      transp = drunp->__trans;
+      while (transp != NULL)
+	{
+	  struct __gconv_trans_data *curp = transp;
+	  transp = transp->__next;
+
+	  if (__builtin_expect (curp->__trans_end_fct != NULL, 0))
+	    curp->__trans_end_fct (curp->__data);
+
+	  free (curp);
+	}
+
       if (!(drunp->__flags & __GCONV_IS_LAST) && drunp->__outbuf != NULL)
 	free (drunp->__outbuf);
     }
diff --git a/iconv/gconv_conf.c b/iconv/gconv_conf.c
index 0d25c22..480b459 100644
--- a/iconv/gconv_conf.c
+++ b/iconv/gconv_conf.c
@@ -1,5 +1,5 @@
 /* Handle configuration data.
-   Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
+   Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
 
@@ -18,6 +18,7 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <assert.h>
 #include <ctype.h>
 #include <errno.h>
 #include <limits.h>
@@ -34,6 +35,14 @@
 /* This is the default path where we look for module lists.  */
 static const char default_gconv_path[] = GCONV_PATH;
 
+/* The path element in use.   */
+const struct path_elem *__gconv_path_elem;
+/* Maximum length of a single path element.  */
+size_t __gconv_max_path_elem_len;
+
+/* We use the following struct if we couldn't allocate memory.  */
+static const struct path_elem empty_path_elem;
+
 /* Name of the file containing the module information in the directories
    along the path.  */
 static const char gconv_conf_filename[] = "gconv-modules";
@@ -497,48 +506,125 @@ read_conf_file (const char *filename, const char *directory, size_t dir_len,
 	/* Otherwise ignore the line.  */
     }
 
-  if (line != NULL)
-    free (line);
+  free (line);
+
   fclose (fp);
 }
 
 
+/* Determine the directories we are looking for data in.  */
+void
+__gconv_get_path (void)
+{
+  struct path_elem *result;
+  __libc_lock_define_initialized (static, lock);
+
+  __libc_lock_lock (lock);
+
+  /* Make sure there wasn't a second thread doing it already.  */
+  result = (struct path_elem *) __gconv_path_elem;
+  if (result == NULL)
+    {
+      /* Determine the complete path first.  */
+      const char *user_path;
+      char *gconv_path;
+      size_t gconv_path_len;
+      char *elem;
+      char *oldp;
+      char *cp;
+      int nelems;
+
+      user_path = __secure_getenv ("GCONV_PATH");
+      if (user_path == NULL)
+	{
+	  /* No user-defined path.  Make a modifiable copy of the
+	     default path.  */
+	  gconv_path = strdupa (default_gconv_path);
+	  gconv_path_len = sizeof (default_gconv_path);
+	}
+      else
+	{
+	  /* Append the default path to the user-defined path.  */
+	  size_t user_len = strlen (user_path);
+
+	  gconv_path_len = user_len + 1 + sizeof (default_gconv_path);
+	  gconv_path = alloca (gconv_path_len);
+	  __mempcpy (__mempcpy (__mempcpy (gconv_path, user_path, user_len),
+				":", 1),
+		     default_gconv_path, sizeof (default_gconv_path));
+	}
+
+      /* In a first pass we calculate the number of elements.  */
+      oldp = NULL;
+      cp = strchr (gconv_path, ':');
+      nelems = 1;
+      while (cp != NULL)
+	{
+	  if (cp != oldp + 1)
+	    ++nelems;
+	  oldp = cp;
+	  cp =  strchr (cp + 1, ':');
+	}
+
+      /* Allocate the memory for the result.  */
+      result = (struct path_elem *) malloc ((nelems + 1)
+					    * sizeof (struct path_elem)
+					    + gconv_path_len + nelems);
+      if (result != NULL)
+	{
+	  char *strspace = (char *) &result[nelems + 1];
+	  int n = 0;
+
+	  /* Separate the individual parts.  */
+	  __gconv_max_path_elem_len = 0;
+	  elem = __strtok_r (gconv_path, ":", &gconv_path);
+	  assert (elem != NULL);
+	  do
+	    {
+	      result[n].name = strspace;
+	      strspace = __stpcpy (strspace, elem);
+	      if (strspace[-1] != '/')
+		*strspace++ = '/';
+
+	      result[n].len = strspace - result[n].name;
+	      if (result[n].len > __gconv_max_path_elem_len)
+		__gconv_max_path_elem_len = result[n].len;
+
+	      *strspace++ = '\0';
+	      ++n;
+	    }
+	  while ((elem = __strtok_r (NULL, ":", &gconv_path)) != NULL);
+
+	  result[n].name = NULL;
+	  result[n].len = 0;
+	}
+
+      __gconv_path_elem = result ?: &empty_path_elem;
+    }
+
+  __libc_lock_unlock (lock);
+}
+
+
 /* Read all configuration files found in the user-specified and the default
    path.  */
 void
 __gconv_read_conf (void)
 {
-  const char *user_path = __secure_getenv ("GCONV_PATH");
-  char *gconv_path, *elem;
   void *modules = NULL;
   size_t nmodules = 0;
   int save_errno = errno;
   size_t cnt;
 
-  if (user_path == NULL)
-    /* No user-defined path.  Make a modifiable copy of the default path.  */
-    gconv_path = strdupa (default_gconv_path);
-  else
-    {
-      /* Append the default path to the user-defined path.  */
-      size_t user_len = strlen (user_path);
-
-      gconv_path = alloca (user_len + 1 + sizeof (default_gconv_path));
-      __mempcpy (__mempcpy (__mempcpy (gconv_path, user_path, user_len),
-			    ":", 1),
-		 default_gconv_path, sizeof (default_gconv_path));
-    }
+  /* Find out where we have to look.  */
+  if (__gconv_path_elem == NULL)
+    __gconv_get_path ();
 
-  elem = __strtok_r (gconv_path, ":", &gconv_path);
-  while (elem != NULL)
+  for (cnt = 0; __gconv_path_elem[cnt].name != NULL; ++cnt)
     {
-#ifndef MAXPATHLEN
-      /* We define a reasonable limit.  */
-# define MAXPATHLEN 4096
-#endif
-      char real_elem[MAXPATHLEN];
+      char real_elem[__gconv_max_path_elem_len + sizeof (gconv_conf_filename)];
 
-      if (__realpath (elem, real_elem) != NULL)
+      if (__realpath (__gconv_path_elem[cnt].name, real_elem) != NULL)
 	{
 	  size_t elem_len = strlen (real_elem);
 	  char *filename;
@@ -551,9 +637,6 @@ __gconv_read_conf (void)
 	  /* Read the next configuration file.  */
 	  read_conf_file (filename, real_elem, elem_len, &modules, &nmodules);
 	}
-
-      /* Get next element in the path.  */
-      elem = __strtok_r (NULL, ":", &gconv_path);
     }
 
   /* Add the internal modules.  */
@@ -586,3 +669,15 @@ __gconv_read_conf (void)
   /* Restore the error number.  */
   __set_errno (save_errno);
 }
+
+
+
+/* Free all resources if necessary.  */
+static void __attribute__ ((unused))
+free_mem (void)
+{
+  if (__gconv_path_elem != NULL && __gconv_path_elem != &empty_path_elem)
+    free ((void *) __gconv_path_elem);
+}
+
+text_set_element (__libc_subfreeres, free_mem);
diff --git a/iconv/gconv_int.h b/iconv/gconv_int.h
index 5bdf714..6d19971 100644
--- a/iconv/gconv_int.h
+++ b/iconv/gconv_int.h
@@ -26,6 +26,19 @@
 __BEGIN_DECLS
 
 
+/* Type to represent search path.  */
+struct path_elem
+{
+  const char *name;
+  size_t len;
+};
+
+/* Variable with search path for `gconv' implementation.  */
+extern const struct path_elem *__gconv_path_elem;
+/* Maximum length of a single path element.  */
+extern size_t __gconv_max_path_elem_len;
+
+
 /* Structure for alias definition.  Simply to strings.  */
 struct gconv_alias
 {
@@ -83,6 +96,21 @@ struct gconv_module
 };
 
 
+/* Internal data structure to represent transliteration module.  */
+struct trans_struct
+{
+  const char *name;
+  struct trans_struct *next;
+
+  const char **csnames;
+  size_t ncsnames;
+  __gconv_trans_fct trans_fct;
+  __gconv_trans_context_fct trans_context_fct;
+  __gconv_trans_init_fct trans_init_fct;
+  __gconv_trans_end_fct trans_end_fct;
+};
+
+
 /* Flags for `gconv_open'.  */
 enum
 {
@@ -161,6 +189,9 @@ extern int __gconv_find_transform (const char *toset, const char *fromset,
 /* Read all the configuration data and cache it.  */
 extern void __gconv_read_conf (void);
 
+/* Determine the directories we are looking in.  */
+extern void __gconv_get_path (void);
+
 /* Comparison function to search alias.  */
 extern int __gconv_alias_compare (const void *p1, const void *p2);
 
@@ -185,9 +216,14 @@ extern void __gconv_get_builtin_trans (const char *name,
 				       struct __gconv_step *step)
      internal_function;
 
+/* Try to load transliteration step module.  */
+extern int __gconv_translit_find (struct trans_struct *trans)
+     internal_function;
+
 /* Transliteration using the locale's data.  */
 extern int __gconv_transliterate (struct __gconv_step *step,
 				  struct __gconv_step_data *step_data,
+				  void *trans_data,
 				  __const unsigned char *inbufstart,
 				  __const unsigned char **inbufp,
 				  __const unsigned char *inbufend,
diff --git a/iconv/gconv_open.c b/iconv/gconv_open.c
index d2963fa..2374703 100644
--- a/iconv/gconv_open.c
+++ b/iconv/gconv_open.c
@@ -38,6 +38,7 @@ __gconv_open (const char *toset, const char *fromset, __gconv_t *handle,
   int conv_flags = 0;
   const char *errhand;
   const char *ignore;
+  struct trans_struct *trans = NULL;
 
   /* Find out whether any error handling method is specified.  */
   errhand = strchr (toset, '/');
@@ -51,17 +52,85 @@ __gconv_open (const char *toset, const char *fromset, __gconv_t *handle,
 	{
 	  /* Make copy without the error handling description.  */
 	  char *newtoset = (char *) alloca (errhand - toset + 1);
+	  char *tok;
+	  char *ptr;
 
 	  newtoset[errhand - toset] = '\0';
 	  toset = memcpy (newtoset, toset, errhand - toset);
 
-	  flags = __GCONV_IGNORE_ERRORS;
+	  /* Find the appropriate transliteration handlers.  */
+	  tok = strdupa (errhand);
 
-	  if (__strcasecmp (errhand, "IGNORE") == 0)
+	  tok = __strtok_r (tok, ",", &ptr);
+	  while (tok != NULL)
 	    {
-	      /* Found it.  This means we should ignore conversion errors.  */
-	      flags = __GCONV_IGNORE_ERRORS;
-	      errhand = NULL;
+	      if (__strcasecmp (tok, "TRANSLIT") == 0)
+		{
+		  /* It's the builtin transliteration handling.  We only
+		     support it for working on the internal encoding.  */
+		  static const char *internal_trans_names[1] = { "INTERNAL" };
+		  struct trans_struct *lastp = NULL;
+		  struct trans_struct *runp;
+
+		  for (runp = trans; runp != NULL; runp = runp->next)
+		    if (runp->trans_fct == __gconv_transliterate)
+		      break;
+		    else
+		      lastp = runp;
+
+		  if (runp == NULL)
+		    {
+		      struct trans_struct *newp;
+
+		      newp = (struct trans_struct *) alloca (sizeof (*newp));
+		      memset (newp, '\0', sizeof (*newp));
+
+		      /* We leave the `name' field zero to signal that
+			 this is an internal transliteration step.  */
+		      newp->csnames = internal_trans_names;
+		      newp->ncsnames = 1;
+		      newp->trans_fct = __gconv_transliterate;
+
+		      if (lastp == NULL)
+			trans = newp;
+		      else
+			lastp->next = newp;
+		    }
+		}
+	      else if (__strcasecmp (tok, "IGNORE") == 0)
+		/* Set the flag to ignore all errors.  */
+		flags = __GCONV_IGNORE_ERRORS;
+	      else
+		{
+		  /* `tok' is possibly a module name.  We'll see later
+		     whether we can find it.  But first see that we do
+		     not already a module of this name.  */
+		  struct trans_struct *lastp = NULL;
+		  struct trans_struct *runp;
+
+		  for (runp = trans; runp != NULL; runp = runp->next)
+		    if (runp->name != NULL
+			&& __strcasecmp (tok, runp->name) == 0)
+		      break;
+		    else
+		      lastp = runp;
+
+		  if (runp == NULL)
+		    {
+		      struct trans_struct *newp;
+
+		      newp = (struct trans_struct *) alloca (sizeof (*newp));
+		      memset (newp, '\0', sizeof (*newp));
+		      newp->name = tok;
+
+		      if (lastp == NULL)
+			trans = newp;
+		      else
+			lastp->next = newp;
+		    }
+		}
+
+	      tok = __strtok_r (NULL, ",", &ptr);
 	    }
 	}
     }
@@ -81,31 +150,18 @@ __gconv_open (const char *toset, const char *fromset, __gconv_t *handle,
   res = __gconv_find_transform (toset, fromset, &steps, &nsteps, flags);
   if (res == __GCONV_OK)
     {
-      const char **csnames = NULL;
-      size_t ncsnames = 0;
-      __gconv_trans_fct trans_fct = NULL;
-      __gconv_trans_context_fct trans_context_fct = NULL;
-      __gconv_trans_init_fct trans_init_fct = NULL;
-      __gconv_trans_end_fct trans_end_fct = NULL;
-
-      if (errhand != NULL)
+      /* Find the modules.  */
+      struct trans_struct *lastp = NULL;
+      struct trans_struct *runp;
+
+      for (runp = trans; runp != NULL; runp = runp->next)
 	{
-	  /* Find the appropriate transliteration handling.  */
-	  if (__strcasecmp (errhand, "TRANSLIT") == 0)
-	    {
-	      /* It's the builtin transliteration handling.  We only
-                 suport for it working on the internal encoding.  */
-	      static const char *internal_trans_names[1] = { "INTERNAL" };
-
-	      csnames = internal_trans_names;
-	      ncsnames = 1;
-	      trans_fct = __gconv_transliterate;
-	      /* No context, init, or end function.  */
-	    }
-	  else if (__strcasecmp (errhand, "WORK AROUND A GCC BUG") == 0)
-	    {
-	      trans_init_fct = (__gconv_trans_init_fct) 1;
-	    }
+	  if (runp->name == NULL
+	      || __builtin_expect (__gconv_translit_find (runp), 0) == 0)
+	    lastp = runp;
+	  else
+	    /* This means we haven't found the module.  Remove it.  */
+	    (lastp == NULL ? trans : lastp->next) = runp->next;
 	}
 
       /* Allocate room for handle.  */
@@ -154,32 +210,51 @@ __gconv_open (const char *toset, const char *fromset, __gconv_t *handle,
 
 	      result->__data[cnt].__outbuf = (char *) malloc (size);
 	      if (result->__data[cnt].__outbuf == NULL)
-		{
-		  res = __GCONV_NOMEM;
-		  break;
-		}
+		goto bail;
+
 	      result->__data[cnt].__outbufend =
 		result->__data[cnt].__outbuf + size;
 
-	      /* Now see whether we can use the transliteration module
-		 for this step.  */
-	      for (n = 0; n < ncsnames; ++n)
-		if (__strcasecmp (steps[cnt].__from_name, csnames[n]) == 0)
-		  {
-		    /* Match!  Now try the initializer.  */
-		    if (trans_init_fct == NULL
-			|| (trans_init_fct (&result->__data[cnt].__trans.__data,
-					    steps[cnt].__to_name)
-			    == __GCONV_OK))
-		      {
-			result->__data[cnt].__trans.__trans_fct = trans_fct;
-			result->__data[cnt].__trans.__trans_context_fct =
-			  trans_context_fct;
-			result->__data[cnt].__trans.__trans_end_fct =
-			  trans_end_fct;
-		      }
-		    break;
-		  }
+	      /* Now see whether we can use any of the transliteration
+		 modules for this step.  */
+	      for (runp = trans; runp != NULL; runp = runp->next)
+		for (n = 0; n < runp->ncsnames; ++n)
+		  if (__strcasecmp (steps[cnt].__from_name,
+				    runp->csnames[n]) == 0)
+		    {
+		      void *data = NULL;
+
+		      /* Match!  Now try the initializer.  */
+		      if (runp->trans_init_fct == NULL
+			  || (runp->trans_init_fct (data, steps[cnt].__to_name)
+			      == __GCONV_OK))
+			{
+			  /* Append at the end of the list.  */
+			  struct __gconv_trans_data *newp;
+			  struct __gconv_trans_data *endp;
+			  struct __gconv_trans_data *lastp;
+
+			  newp = (struct __gconv_trans_data *)
+			    malloc (sizeof (struct __gconv_trans_data));
+			  if (newp == NULL)
+			    goto bail;
+
+			  newp->__trans_fct = runp->trans_fct;
+			  newp->__trans_context_fct = runp->trans_context_fct;
+			  newp->__trans_end_fct = runp->trans_end_fct;
+
+			  lastp = NULL;
+			  for (endp = result->__data[cnt].__trans;
+			       endp != NULL; endp = endp->__next)
+			    lastp = endp;
+
+			  if (lastp == NULL)
+			    result->__data[cnt].__trans = newp;
+			  else
+			    lastp->__next = newp;
+			}
+		      break;
+		    }
 	    }
 
 	  /* Now handle the last entry.  */
@@ -194,34 +269,72 @@ __gconv_open (const char *toset, const char *fromset, __gconv_t *handle,
 
 	  /* Now see whether we can use the transliteration module
 	     for this step.  */
-	  for (n = 0; n < ncsnames; ++n)
-	    if (__strcasecmp (steps[cnt].__from_name, csnames[n]) == 0)
-	      {
-		/* Match!  Now try the initializer.  */
-		if (trans_init_fct == NULL
-		    || trans_init_fct (&result->__data[cnt].__trans.__data,
-				       steps[cnt].__to_name)
-		    == __GCONV_OK)
-		  {
-		    result->__data[cnt].__trans.__trans_fct = trans_fct;
-		    result->__data[cnt].__trans.__trans_context_fct =
-		      trans_context_fct;
-		    result->__data[cnt].__trans.__trans_end_fct =
-		      trans_end_fct;
-		  }
-		break;
-	      }
+	  for (runp = trans; runp != NULL; runp = runp->next)
+	    for (n = 0; n < runp->ncsnames; ++n)
+	      if (__strcasecmp (steps[cnt].__from_name, runp->csnames[n]) == 0)
+		{
+		  void *data = NULL;
+
+		  /* Match!  Now try the initializer.  */
+		  if (runp->trans_init_fct == NULL
+		      || (runp->trans_init_fct (data, steps[cnt].__to_name)
+			  == __GCONV_OK))
+		    {
+		      /* Append at the end of the list.  */
+		      struct __gconv_trans_data *newp;
+		      struct __gconv_trans_data *endp;
+		      struct __gconv_trans_data *lastp;
+
+		      newp = (struct __gconv_trans_data *)
+			malloc (sizeof (struct __gconv_trans_data));
+		      if (newp == NULL)
+			goto bail;
+
+		      newp->__trans_fct = runp->trans_fct;
+		      newp->__trans_context_fct = runp->trans_context_fct;
+		      newp->__trans_end_fct = runp->trans_end_fct;
+
+		      lastp = NULL;
+		      for (endp = result->__data[cnt].__trans;
+			   endp != NULL; endp = endp->__next)
+			lastp = endp;
+
+		      if (lastp == NULL)
+			result->__data[cnt].__trans = newp;
+		      else
+			lastp->__next = newp;
+		    }
+		  break;
+		}
 	}
 
       if (res != __GCONV_OK)
 	{
 	  /* Something went wrong.  Free all the resources.  */
-	  int serrno = errno;
+	  int serrno;
+	bail:
+	  serrno = errno;
 
 	  if (result != NULL)
 	    {
 	      while (cnt-- > 0)
-		free (result->__data[cnt].__outbuf);
+		{
+		  struct __gconv_trans_data *transp;
+
+		  transp = result->__data[cnt].__trans;
+		  while (transp != NULL)
+		    {
+		      struct __gconv_trans_data *curp = transp;
+		      transp = transp->__next;
+
+		      if (__builtin_expect (curp->__trans_end_fct != NULL, 0))
+			curp->__trans_end_fct (curp->__data);
+
+		      free (curp);
+		    }
+
+		  free (result->__data[cnt].__outbuf);
+		}
 
 	      free (result);
 	      result = NULL;
diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c
index 3905745..019aac2 100644
--- a/iconv/gconv_simple.c
+++ b/iconv/gconv_simple.c
@@ -797,25 +797,7 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
     /* XXX unaligned.  */						      \
     if (__builtin_expect (*((uint32_t *) inptr), 0) > 0x7f)		      \
       {									      \
-	if (step_data->__trans.__trans_fct != NULL)			      \
-	  {								      \
-	    result = DL_CALL_FCT (step_data->__trans.__trans_fct,	      \
-				  (step, step_data, *inptrp, &inptr, inend,   \
-				   &outptr, irreversible));		      \
-	    if (result != __GCONV_OK)					      \
-	      break;							      \
-	  }								      \
-	else if (! ignore_errors_p ())					      \
-	  {								      \
-	    /* This is no correct ANSI_X3.4-1968 character.  */		      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
-	    break;							      \
-	  }								      \
-	else								      \
-	  {								      \
-	    ++*irreversible;						      \
-	    inptr += 4; 						      \
-	  }								      \
+	STANDARD_ERR_HANDLER (4);					      \
       }									      \
     else								      \
       /* It's an one byte sequence.  */					      \
@@ -1186,24 +1168,7 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
   {									      \
     if (__builtin_expect (*((uint32_t *) inptr), 0) >= 0x10000)		      \
       {									      \
-	if (step_data->__trans.__trans_fct != NULL)			      \
-	  {								      \
-	    result = DL_CALL_FCT (step_data->__trans.__trans_fct,	      \
-				  (step, step_data, *inptrp, &inptr, inend,   \
-				   &outptr, irreversible));		      \
-	    if (result != __GCONV_OK)					      \
-	      break;							      \
-	  }								      \
-	else if (! ignore_errors_p ())					      \
-	  {								      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
-	    break;							      \
-	  }								      \
-	else								      \
-	  {								      \
-	    inptr += 4;							      \
-	    ++*irreversible;						      \
-	  }								      \
+	STANDARD_ERR_HANDLER (4);					      \
       }									      \
     else 								      \
       *((uint16_t *) outptr)++ = *((uint32_t *) inptr)++;		      \
@@ -1253,25 +1218,7 @@ ucs4le_internal_loop_single (struct __gconv_step *step,
     uint32_t val = *((uint32_t *) inptr);				      \
     if (__builtin_expect (val, 0) >= 0x10000)				      \
       {									      \
-	if (step_data->__trans.__trans_fct != NULL)			      \
-	  {								      \
-	    result = DL_CALL_FCT (step_data->__trans.__trans_fct,	      \
-				  (step, step_data, *inptrp, &inptr, inend,   \
-				   &outptr, irreversible));		      \
-	    if (result != __GCONV_OK)					      \
-	      break;							      \
-	  }								      \
-	else if (! ignore_errors_p ())					      \
-	  {								      \
-	    result = __GCONV_ILLEGAL_INPUT;				      \
-	    break;							      \
-	  }								      \
-	else								      \
-	  {								      \
-	    inptr += 4;							      \
-	    ++*irreversible;						      \
-	  }								      \
-	continue;							      \
+	STANDARD_ERR_HANDLER (4);					      \
       }									      \
     *((uint16_t *) outptr)++ = bswap_16 (val);				      \
     inptr += 4;								      \
diff --git a/iconv/gconv_trans.c b/iconv/gconv_trans.c
index 269917b..4d6e776 100644
--- a/iconv/gconv_trans.c
+++ b/iconv/gconv_trans.c
@@ -18,9 +18,13 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
+#include <assert.h>
 #include <dlfcn.h>
+#include <search.h>
 #include <stdint.h>
+#include <string.h>
 
+#include <bits/libc-lock.h>
 #include "gconv_int.h"
 #include "../locale/localeinfo.h"
 
@@ -28,6 +32,7 @@
 int
 __gconv_transliterate (struct __gconv_step *step,
 		       struct __gconv_step_data *step_data,
+		       void *trans_data __attribute__ ((unused)),
 		       const unsigned char *inbufstart,
 		       const unsigned char **inbufp,
 		       const unsigned char *inbufend,
@@ -218,3 +223,178 @@ __gconv_transliterate (struct __gconv_step *step,
   /* Haven't found a match.  */
   return __GCONV_ILLEGAL_INPUT;
 }
+
+
+/* Structure to represent results of found (or not) transliteration
+   modules.  */
+struct known_trans
+{
+  /* This structure must remain the first member.  */
+  struct trans_struct info;
+
+  const char *fname;
+  void *handle;
+  int open_count;
+};
+
+
+/* Tree with results of previous calls to __gconv_translit_find.  */
+static void *search_tree;
+
+/* We modify global data.   */
+__libc_lock_define_initialized (static, lock);
+
+
+/* Compare two transliteration entries.  */
+static int
+trans_compare (const void *p1, const void *p2)
+{
+  struct known_trans *s1 = (struct known_trans *) p1;
+  struct known_trans *s2 = (struct known_trans *) p2;
+
+  return strcmp (s1->info.name, s2->info.name);
+}
+
+
+/* Open (maybe reopen) the module named in the struct.  Get the function
+   and data structure pointers we need.  */
+static int
+open_translit (struct known_trans *trans)
+{
+  __gconv_trans_query_fct queryfct;
+
+  trans->handle = __libc_dlopen (trans->fname);
+  if (trans->handle == NULL)
+    /* Not available.  */
+    return 1;
+
+  /* Find the required symbol.  */
+  queryfct = __libc_dlsym (trans->handle, "gconv_trans_context");
+  if (queryfct == NULL)
+    {
+      /* We cannot live with that.  */
+    close_and_out:
+      __libc_dlclose (trans->handle);
+      trans->handle = NULL;
+      return 1;
+    }
+
+  /* Get the context.  */
+  if (queryfct (trans->info.name, &trans->info.csnames, &trans->info.ncsnames)
+      != 0)
+    goto close_and_out;
+
+  /* Of course we also have to have the actual function.  */
+  trans->info.trans_fct = __libc_dlsym (trans->handle, "gconv_trans");
+  if (trans->info.trans_fct == NULL)
+    goto close_and_out;
+
+  /* Now the optional functions.  */
+  trans->info.trans_init_fct =
+    __libc_dlsym (trans->handle, "gconv_trans_init");
+  trans->info.trans_context_fct =
+    __libc_dlsym (trans->handle, "gconv_trans_context");
+  trans->info.trans_end_fct =
+    __libc_dlsym (trans->handle, "gconv_trans_end");
+
+  trans->open_count = 1;
+
+  return 0;
+}
+
+
+int
+internal_function
+__gconv_translit_find (struct trans_struct *trans)
+{
+  struct known_trans **found;
+  const struct path_elem *runp;
+  int res = 1;
+
+  /* We have to have a name.  */
+  assert (trans->name != NULL);
+
+  /* Acquire the lock.  */
+  __libc_lock_lock (lock);
+
+  /* See whether we know this module already.  */
+  found = __tfind (trans, &search_tree, trans_compare);
+  if (found != NULL)
+    {
+      /* Is this module available?  */
+      if ((*found)->handle != NULL)
+	{
+	  /* Maybe we have to reopen the file.  */
+	  if ((*found)->handle != (void *) -1)
+	    /* The object is not unloaded.  */
+	    res = 0;
+	  else if (open_translit (*found) == 0)
+	    {
+	      /* Copy the data.  */
+	      *trans = (*found)->info;
+	      res = 0;
+	    }
+	}
+    }
+  else
+    {
+      size_t name_len = strlen (trans->name) + 1;
+      int need_so = 0;
+      struct known_trans *newp;
+
+      /* We have to continue looking for the module.  */
+      if (__gconv_path_elem == NULL)
+	__gconv_get_path ();
+
+      /* See whether we have to append .so.  */
+      if (name_len <= 3 || memcmp (&trans->name[name_len - 3], ".so", 3) != 0)
+	need_so = 1;
+
+      /* Create a new entry.  */
+      newp = (struct known_trans *) malloc (sizeof (struct known_trans)
+					    + (__gconv_max_path_elem_len
+					       + name_len + 3)
+					    + name_len);
+      if (newp != NULL)
+	{
+	  char *cp;
+
+	  /* Clear the struct.  */
+	  memset (newp, '\0', sizeof (struct known_trans));
+
+	  /* Store a copy of the module name.  */
+	  newp->info.name = (char *) (newp + 1);
+	  cp = __mempcpy ((char *) newp->info.name, trans->name, name_len);
+
+	  newp->fname = cp;
+
+	  /* Seach in all the directories.  */
+	  for (runp = __gconv_path_elem; runp->name != NULL; ++runp)
+	    {
+	      cp = __mempcpy (__stpcpy ((char *) newp->fname, runp->name),
+			      trans->name, name_len);
+	      if (need_so)
+		memcpy (cp, ".so", sizeof (".so"));
+
+	      if (open_translit (newp) == 0)
+		{
+		  /* We found a module.  */
+		  res = 0;
+		  break;
+		}
+	    }
+
+	  /* In any case we'll add the entry to our search tree.  */
+	  if (__tsearch (newp, &search_tree, trans_compare) == NULL)
+	    {
+	      /* Yickes, this should not happen.  Unload the object.  */
+	      res = 1;
+	      /* XXX unload here.  */
+	    }
+	}
+    }
+
+  __libc_lock_unlock (lock);
+
+  return res;
+}
diff --git a/iconv/loop.c b/iconv/loop.c
index ebbc136..04ae50b 100644
--- a/iconv/loop.c
+++ b/iconv/loop.c
@@ -173,6 +173,38 @@
 #define ignore_errors_p() (flags & __GCONV_IGNORE_ERRORS)
 
 
+/* Error handling with transliteration/transcription function use and
+   ignoring of errors.  Note that we cannot use the do while (0) trick
+   since `break' and `continue' must reach certain points.  */
+#define STANDARD_ERR_HANDLER(Incr) \
+  {									      \
+    struct __gconv_trans_data *trans;					      \
+									      \
+    result = __GCONV_ILLEGAL_INPUT;					      \
+    /* First try the transliteration methods.  */			      \
+    for (trans = step_data->__trans; trans != NULL; trans = trans->__next)    \
+      {									      \
+	result = DL_CALL_FCT (trans->__trans_fct,			      \
+			      (step, step_data, trans->__data, *inptrp,	      \
+			       &inptr, inend, &outptr, irreversible));	      \
+	if (result != __GCONV_ILLEGAL_INPUT)				      \
+	  break;							      \
+      }									      \
+    /* If any of them recognized the input stop.  */			      \
+    if (result != __GCONV_ILLEGAL_INPUT)				      \
+      break;								      \
+									      \
+    /* Next see whether we have to ignore the error.  If not, stop.  */	      \
+    if (! ignore_errors_p ())						      \
+      break;								      \
+    									      \
+    /* When we come here it means we ignore the character.  */		      \
+    ++*irreversible;							      \
+    inptr += Incr;							      \
+    continue;								      \
+  }
+
+
 /* The function returns the status, as defined in gconv.h.  */
 static inline int
 FCTNAME (LOOPFCT) (struct __gconv_step *step,
diff --git a/iconv/skeleton.c b/iconv/skeleton.c
index 8dbebb8..854cc70 100644
--- a/iconv/skeleton.c
+++ b/iconv/skeleton.c
@@ -379,6 +379,8 @@ FUNCTION_NAME (struct __gconv_step *step, struct __gconv_step_data *data,
 
       do
 	{
+	  struct __gconv_trans_data *trans;
+
 	  /* Remember the start value for this round.  */
 	  inptr = *inptrp;
 	  /* The outbuf buffer is empty.  */
@@ -429,10 +431,10 @@ FUNCTION_NAME (struct __gconv_step *step, struct __gconv_step_data *data,
 
 	  /* Give the transliteration module the chance to store the
 	     original text and the result in case it needs a context.  */
-	  if (data->__trans.__trans_context_fct != NULL)
-	    DL_CALL_FCT (data->__trans.__trans_context_fct,
-			 (data->__trans.__data, inptr, *inptrp,
-			  outstart, outbuf));
+	  for (trans = data->__trans; trans != NULL; trans = trans->__next)
+	    if (trans->__trans_context_fct != NULL)
+	      DL_CALL_FCT (trans->__trans_context_fct,
+			   (trans->__data, inptr, *inptrp, outstart, outbuf));
 
 	  /* We finished one use of the loops.  */
 	  ++data->__invocation_counter;