Update.cvs/libc-ud-971118cvs/libc-ud-971117

1997-11-18 02:31  Ulrich Drepper  <drepper@cygnus.com>

	* iconv/Makefile: New file.
	* iconv/gconv.c: New file.
	* iconv/gconv.h: New file.
	* iconv/gconv_builtin.c: New file.
	* iconv/gconv_builtin.h: New file.
	* iconv/gconv_close.c: New file.
	* iconv/gconv_conf.c: New file.
	* iconv/gconv_db.c: New file.
	* iconv/gconv_dl.c: New file.
	* iconv/gconv_open.c: New file.
	* iconv/gconv_simple.c: New file.
	* iconv/iconv.c: New file.
	* iconv/iconv.h: New file.
	* iconv/iconv_close.c: New file.
	* iconv/iconv_open.c: New file.
	* include/gconv.h: New file.

	* Makeconfig: Define gconvdir.
	* Makefile (subdirs): Add iconv.

	* string/bits/string2.h: Add optimization for strtok_r.

	* sysdeps/generic/_G_config.h: Define __need_NULL to get definition
	for NULL.
	Reported by H.J. Lu <hjl@gnu.ai.mit.edu>.
	* configure.in: Correct test for bash2.
	* locale/Makefile (CFLAGS-charmap.c): Add -Wno-char-subscripts.
	(CFLAGS-locfile.c): Likewise.
	Suggested by Zack Weinberg <zack@rabi.phys.columbia.edu>.
	* misc/hsearch_r.c (hsearch_r): Avoid undefinitely search for
	non-existing entry if the table is full.
	* posix/regex.h: Pretty print.
	* stdio-common/printf_fp.c: Don't define NDEBUG if already defined.
	* sysdeps/posix/ctermid.c: Simplify a bit.
	* sysdeps/unix/sysv/linux/net/if.h: Pretty print.
1997-11-17  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* sysdeps/unix/sysv/linux/sys/quota.h: Add include for
	<sys/types.h> instead of <asm/types.h>.
1997-11-16  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* math/libm-test.c (asin_test): Add epsilon for asin (0.5).
1997-11-16 17:09  H.J. Lu  <hjl@gnu.ai.mit.edu>
	* libc.map (_IO_stdin_, _IO_stdout_, _IO_stderr_, _IO_fopen,
	fopen, freopen, _IO_fclose, fclose): Added to GLIBC_2.0.
	(_IO_stdin_, _IO_stdout_, _IO_stderr_): Removed from GLIBC_2.1.
	(_IO_2_1_stdin_, _IO_2_1_stdout_, _IO_2_1_stderr_, _IO_fclose,
	fclose): Added to GLIBC_2.1.
	* libio/Makefile (routines, shared-only-routines): Add
	oldiofclose.  Remove oldfreopen.
	* libio/freopen.c (freopen): When PIC is defined, call
	_IO_old_freopen () for old stdio.
	* libio/iofclose.c (_IO_new_fclose): Renamed from _IO_fclose.
	(_IO_fclose, fclose): Use _IO_new_fclose as default version
	for GLIBC_2.1.
	* libio/iolibio.h (_IO_old_freopen): Use _IO_old_file_close_it
	instead of _IO_file_close_it.
	* libio/libio.h (_IO_stdin_, _IO_stdout_, _IO_stderr_): Changed
	to _IO_2_1_stdxxx_.
	(_IO_stdin, _IO_stdout, _IO_stderr): Declare as extern if _LIBC
	* libio/libioP.h (_IO_old_do_flush): New.
	* libio/oldfileops.c (_IO_old_file_close_it,
	_IO_old_file_finish, _IO_old_file_overflow, _IO_old_file_sync):
	Call _IO_old_do_flush () instead of _IO_do_flush ().
	(_IO_old_file_xsputn): Call _IO_old_do_write () instead of
	_IO_do_write ().
	* libio/oldiofopen.c (_IO_old_fopen): Call _IO_old_file_init ()
	instead of _IO_file_init ().
	Bind old symbols to version GLIBC_2.0.
	* libio/oldstdfiles.c (DEF_STDFILE): Don't use symbol_version.
	(_IO_old_stdin_, _IO_old_stdout_, _IO_old_stderr_): Changed to
	_IO_stdxxx_.
	(_IO_check_libio): New function in .init.
	* libio/oldiofclose.c: New file.
	* libio/stdfiles.c (_IO_new_stdin_, _IO_new_stdout_,
	_IO_new_stderr_): Changed to _IO_2_1_stdxxx_.
	(DEF_STDFILE): Don't use default_symbol_version.
	* libio/stdio.c (stdin, stdout, stderr): Set to
	_IO_2_1_stdxxx_._
	(_IO_stdin, _IO_stdout, _IO_stderr): New, strong alias of
	stdxxx.
	* csu/Makefile (distribute): Add init.c.
	(extra-objs): Add init.o for ELF.
	(start-installed-name): Add $(objpfx)init.o.
	* csu/init.c: New file.
1997-11-12 08:02  H.J. Lu  <hjl@gnu.ai.mit.edu>
	* elf/dl-lookup.c (do_lookup): Don't use the hidden base
	definition as the default.
1997-08-27  Klaus Espenlaub  <kespenla@hydra.informatik.uni-ulm.de>
	* erand48_r.c (__erand48_r): Implement for 32 bit short int.
1997-11-15  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* elf/genrtldtbl.awk: Replace gensub for compatibility with gawk2
	(PR 351).
1997-11-16 21:01  Philip Blundell  <Philip.Blundell@pobox.com>
	* sysdeps/arm/sysdep.h: Use __APCS_32__ to decide whether or not
	to preserve condition codes on function call.
1997-11-13  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* sysdeps/generic/s_exp2l.c: Change exp2l to __ieee754_exp2l.
1997-11-14  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* math/libm-test.c (asin_test): Add epsilon for float.
	(tan_test): Add epsilon for float.
	(log1p_test): Add epsilon for float.
	(inverse_functions): Add epsilons.
	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers) [socket]: Add
	net/if_packet.h.
	* sysdeps/unix/sysv/linux/Dist: Add net/if_packet.h.
1997-11-10  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* md5-crypt/Makefile (extra-objs): Make recursively expanded
	variable, since $(object-suffixes) is not defined yet.
1997-11-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* db2/Makefile (distribute): db185/db185_int.src ->
	db185/db185_int.h.
1997-11-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* misc/tst-fdset.c: Don't require the value of FD_ISSET to be
	exactly one.
1997-11-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* sysdeps/generic/e_acoshl.c: Fix stub_warning: use the user level
	* sysdeps/generic/e_acosl.c: Likewise.
	* sysdeps/generic/e_asinl.c: Likewise.
	* sysdeps/generic/e_atan2l.c: Likewise.
	* sysdeps/generic/e_expl.c: Likewise.
	* sysdeps/generic/e_fmodl.c: Likewise.
	* sysdeps/generic/e_j0l.c: Likewise.
	* sysdeps/generic/e_j1l.c: Likewise.
	* sysdeps/generic/e_jnl.c: Likewise.
	* sysdeps/generic/e_lgammal_r.c: Likewise.
	* sysdeps/generic/e_log10l.c: Likewise.
	* sysdeps/generic/e_logl.c: Likewise.
	* sysdeps/generic/e_powl.c: Likewise.
	* sysdeps/generic/e_sqrtl.c: Likewise.
	* sysdeps/generic/e_exp2l.c: Likewise.

1997-11-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* Make-dist (+sysdep-names): Remove extra paren.
	* Makefile (distribute): Add stub-tag.h.
	* elf/Makefile (distribute): Add atomicity.h.
	* stdlib/Makefile (headers): Add ucontext.h and sys/ucontext.h.
	* sysdeps/unix/sysv/linux/Makefile (sysdep_headers)
	[$(subdir)=socket]: Add net/if_packet.h.
	* sysdeps/alpha/Dist: Remove setjmp_aux.c.
	* sysdeps/unix/sysv/linux/Dist: Add s_pread64.c, s_pwrite64.c,
	net/if_packet.h, scsi/sg.h.
1997-11-13  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* Makefile (install): Quote $(CC) expansion.
1997-11-14  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* sysdeps/unix/sysv/linux/getcwd.c (__getcwd): Added caching of
	working /proc cwd and no restrictions on path length.  Following
	some ideas from Andi Kleen <ak@muc.de> (PR 350).
1997-11-14 19:14  Thorsten Kukuk  <kukuk@vt.uni-paderborn.de>
	* nis/nss_compat/compat-grp.c: Remove buggy assert call.
1997-11-14 22:23  Ulrich Drepper  <drepper@cygnus.com>
	* sysdeps/libm-i387/s_fdim.S: New file.
	* sysdeps/libm-i387/s_fdimf.S: New file.
	* sysdeps/libm-i387/s_fdiml.S: New file.
	* sysdeps/libm-i387/i686/s_fdim.S: New file.
	* sysdeps/libm-i387/i686/s_fdimf.S: New file.
	* sysdeps/libm-i387/i686/s_fdiml.S: New file.
1997-11-12  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* string/bits/string2.h (strstr): Avoid warning if HAYSTACK is a
	pointer to unsigned char.
1997-11-13  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* sysdeps/libm-ieee754/s_llrintf.c (__llrintf): Fix function.
	* sysdeps/libm-ieee754/s_lrintf.c (__lrintf): Fix function.
	* sysdeps/libm-ieee754/s_lrint.c (__lrint): Fix function.
1997-11-12  Andreas Jaeger  <aj@arthur.rhein-neckar.de>
	* sysdeps/libm-ieee754/s_ilogbf.c: Correct return values for
	ilogb(0/NaN).
	* sysdeps/libm-ieee754/s_ilogbl.c: Likewise.
	* sysdeps/libm-ieee754/s_ilogb.c: Likewise.

1997-11-14 05:44  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/libm-i387/s_fmin.S: New file.
	* sysdeps/libm-i387/s_fminf.S: New file.
	* sysdeps/libm-i387/s_fminl.S: New file.
	* sysdeps/libm-i387/s_fmax.S: New file.
	* sysdeps/libm-i387/s_fmaxf.S: New file.
	* sysdeps/libm-i387/s_fmaxl.S: New file.
	* sysdeps/libm-i387/i686/s_fmin.S: New file.
	* sysdeps/libm-i387/i686/s_fminf.S: New file.
	* sysdeps/libm-i387/i686/s_fminl.S: New file.
	* sysdeps/libm-i387/i686/s_fmax.S: New file.
	* sysdeps/libm-i387/i686/s_fmaxf.S: New file.
	* sysdeps/libm-i387/i686/s_fmaxl.S: New file.

1997-11-14 03:06  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/accept.S: Add __libc_accept as alias.
	* sysdeps/unix/sysv/linux/send.S: Likewise.
	* sysdeps/unix/sysv/linux/recv.S: Likewise.
	* sysdeps/unix/sysv/linux/connect.S: Likewise.
	Reported by Christopher Wiles <wileyc@ai.cs.fujitsu.co.jp>.
See ChangeLog.7 for earlier changes.

15 files changed, 2183 insertions, 0 deletions

diff --git a/iconv/Makefile b/iconv/Makefile
new file mode 100644
index 0000000000..5e5f74878a
--- /dev/null
+++ b/iconv/Makefile
@@ -0,0 +1,32 @@
+# Copyright (C) 1997 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 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.
+
+#
+#	Makefile for iconv.
+#
+subdir	:= iconv
+
+headers		= iconv.h gconv.h
+routines	= iconv_open iconv iconv_close \
+		  gconv_open gconv gconv_close gconv_db gconv_conf \
+		  gconv_dl gconv_builtin gconv_simple
+distribute	= gconv_builtin.h
+
+CFLAGS-gconv_conf.c = -DGCONV_PATH='"$(gconvdir)"'
+
+include ../Rules
diff --git a/iconv/gconv.c b/iconv/gconv.c
new file mode 100644
index 0000000000..537d0dc3e7
--- /dev/null
+++ b/iconv/gconv.c
@@ -0,0 +1,46 @@
+/* Convert characters in input buffer using conversion descriptor to
+   output buffer.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <gconv.h>
+
+
+int
+__gconv (gconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf,
+	 size_t *outbytesleft, size_t *converted)
+{
+  size_t last_step = cd->nsteps - 1;
+  int result;
+
+  cd->data[last_step].outbuf = *outbuf;
+  cd->data[last_step].outbufavail = 0;
+  cd->data[last_step].outbufsize = *outbytesleft;
+
+  if (converted != NULL)
+    *converted = 0;
+
+  result = (*cd->steps->fct) (cd->steps, cd->data, inbuf, inbytesleft,
+			      converted, inbuf == NULL || *inbuf == NULL);
+
+  *outbuf += cd->data[last_step].outbufavail;
+  *outbytesleft -= cd->data[last_step].outbufavail;
+
+  return result;
+}
diff --git a/iconv/gconv.h b/iconv/gconv.h
new file mode 100644
index 0000000000..45f3a6cf8a
--- /dev/null
+++ b/iconv/gconv.h
@@ -0,0 +1,205 @@
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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.  */
+
+#ifndef _GCONV_H
+#define _GCONV_H	1
+
+#include <features.h>
+#include <sys/types.h>
+#include <regex.h>
+
+/* Error codes for gconv functions.  */
+enum
+{
+  GCONV_OK = 0,
+  GCONV_NOCONV,
+  GCONV_NODB,
+  GCONV_NOMEM,
+
+  GCONV_EMPTY_INPUT,
+  GCONV_FULL_OUTPUT,
+  GCONV_ILLEGAL_INPUT,
+
+  GCONV_ILLEGAL_DESCRIPTOR,
+  GCONV_INTERNAL_ERROR
+};
+
+
+/* Structure for alias definition.  Simply to strings.  */
+struct gconv_alias
+{
+  __const char *fromname;
+  __const char *toname;
+};
+
+
+/* Default size of intermediate buffers.  */
+#define GCONV_DEFAULT_BUFSIZE	8160
+
+
+/* Forward declarations.  */
+struct gconv_step;
+struct gconv_step_data;
+
+
+/* Type of a conversion function.  */
+typedef int (*gconv_fct) __P ((struct gconv_step *,
+			       struct gconv_step_data *,
+			       __const char *, size_t *, size_t *, int));
+
+/* Constructor and destructor for local data for conversion step.  */
+typedef int (*gconv_init_fct) __P ((struct gconv_step *,
+				    struct gconv_step_data *));
+typedef void (*gconv_end_fct) __P ((struct gconv_step_data *));
+
+
+/* Description of a conversion step.  */
+struct gconv_step
+{
+  void *shlib_handle;
+
+  __const char *from_name;
+  __const char *to_name;
+
+  gconv_fct fct;
+  gconv_init_fct init_fct;
+  gconv_end_fct end_fct;
+};
+
+/* Additional data for steps in use of conversion descriptor.  This is
+   allocated by the `init' function.  */
+struct gconv_step_data
+{
+  char *outbuf;		/* Output buffer for this step.  */
+  size_t outbufavail;	/* Bytes already available in output buffer.  */
+  size_t outbufsize;	/* Size of output buffer.  */
+
+  int is_last;
+
+  void *data;		/* Pointer to step-local data.  */
+};
+
+/* Combine conversion step description with data.  */
+typedef struct gconv_info
+{
+  size_t nsteps;
+  struct gconv_step *steps;
+  struct gconv_step_data *data;
+} *gconv_t;
+
+
+/* Description for an available conversion module.  */
+struct gconv_module
+{
+  __const char *from_pattern;
+  __const char *from_constpfx;
+  size_t from_constpfx_len;
+  __const regex_t *from_regex;
+
+  __const char *to_string;
+
+  int cost;
+
+  __const char *module_name;
+};
+
+
+/* Global variables.  */
+
+/* Database of alias names.  */
+extern void *__gconv_alias_db;
+
+/* Array with available modules.  */
+extern size_t __gconv_nmodules;
+extern struct gconv_module **__gconv_modules_db;
+
+
+/* Return in *HANDLE decriptor for transformation from FROMSET to TOSET.  */
+extern int __gconv_open __P ((__const char *__toset, __const char *__fromset,
+			      gconv_t *__handle));
+
+/* Free resources associated with transformation descriptor CD.  */
+extern int __gconv_close __P ((gconv_t cd));
+
+/* Transform at most *INBYTESLEFT bytes from buffer starting at *INBUF
+   according to rules described by CD and place up to *OUTBYTESLEFT
+   bytes in buffer starting at *OUTBUF.  Return number of written
+   characters in *CONVERTED if this pointer is not null.  */
+extern int __gconv __P ((gconv_t __cd,
+			 __const char **__inbuf, size_t *__inbytesleft,
+			 char **__outbuf, size_t *__outbytesleft,
+			 size_t *__converted));
+
+/* Return in *HANDLE a pointer to an array with *NSTEPS elements describing
+   the single steps necessary for transformation from FROMSET to TOSET.  */
+extern int __gconv_find_transform __P ((__const char *__toset,
+					__const char *__fromset,
+					struct gconv_step **__handle,
+					size_t *__nsteps));
+
+/* Read all the configuration data and cache it.  */
+extern void __gconv_read_conf __P ((void));
+
+/* Comparison function to search alias.  */
+extern int __gconv_alias_compare __P ((__const void *__p1,
+				       __const void *__p2));
+
+/* Clear reference to transformation step implementations which might
+   cause the code to be unloaded.  */
+extern int __gconv_close_transform __P ((struct gconv_step *__steps,
+					 size_t __nsteps));
+
+
+/* Find in the shared object associated with HANDLE for a function with
+   name NAME.  Return function pointer or NULL.  */
+extern void *__gconv_find_func __P ((void *__handle, __const char *__name));
+
+/* Load shared object named by NAME.  If already loaded increment reference
+   count.  */
+extern void *__gconv_find_shlib __P ((__const char *__name));
+
+/* Release shared object.  If no further reference is available unload
+   the object.  */
+extern int __gconv_release_shlib __P ((void *__handle));
+
+/* Fill STEP with information about builtin module with NAME.  */
+extern void __gconv_get_builtin_trans __P ((__const char *__name,
+					    struct gconv_step *__step));
+
+
+
+/* Builtin transformations.  */
+#ifdef _LIBC
+# define __BUILTIN_TRANS(Name) \
+  extern int Name __P ((struct gconv_step *__step,			      \
+			struct gconv_step_data *__data, __const char *__inbuf,\
+			size_t *__inlen, size_t *__written, int __do_flush))
+
+__BUILTIN_TRANS (__gconv_transform_dummy);
+__BUILTIN_TRANS (__gconv_transform_ucs4_utf8);
+__BUILTIN_TRANS (__gconv_transform_utf8_ucs4);
+# undef __BUITLIN_TRANS
+
+extern int __gconv_transform_init_rstate __P ((struct gconv_step *__step,
+					      struct gconv_step_data *__data));
+extern void __gconv_transform_end_rstate __P ((struct gconv_step_data *__data));
+
+#endif
+
+#endif /* gconv.h */
diff --git a/iconv/gconv_builtin.c b/iconv/gconv_builtin.c
new file mode 100644
index 0000000000..4193822e16
--- /dev/null
+++ b/iconv/gconv_builtin.c
@@ -0,0 +1,64 @@
+/* Table for builtin transformation mapping.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <gconv.h>
+#include <string.h>
+
+#include <assert.h>
+
+
+static struct builtin_map
+{
+  const char *name;
+  gconv_fct fct;
+  gconv_init_fct init;
+  gconv_end_fct end;
+
+} map[] =
+{
+#define BUILTIN_TRANSFORMATION(From, ConstPfx, ConstLen, To, Cost, Name, \
+			       Fct, Init, End) \
+  {									      \
+    name: Name,								      \
+    fct: Fct,								      \
+    init: Init,								      \
+    end: End,								      \
+  },
+
+#include <gconv_builtin.h>
+};
+
+
+void
+__gconv_get_builtin_trans (const char *name, struct gconv_step *step)
+{
+  size_t cnt;
+
+  for (cnt = 0; cnt < sizeof (map) / sizeof (map[0]); ++cnt)
+    if (strcmp (name, map[cnt].name) == 0)
+      break;
+
+  assert (cnt < sizeof (map) / sizeof (map[0]));
+
+  step->fct = map[cnt].fct;
+  step->init_fct = map[cnt].init;
+  step->end_fct = map[cnt].end;
+  step->shlib_handle = NULL;
+}
diff --git a/iconv/gconv_builtin.h b/iconv/gconv_builtin.h
new file mode 100644
index 0000000000..a3070a532f
--- /dev/null
+++ b/iconv/gconv_builtin.h
@@ -0,0 +1,34 @@
+/* Builtin transformations.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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.  */
+
+BUILTIN_TRANSFORMATION ("\\([^/]+\\)/UCS4/\\([^/]*\\)", NULL, 0,
+			"\\1/UTF8/\\2", 1, "=ucs4->utf8",
+			__gconv_transform_ucs4_utf8,
+			__gconv_transform_init_rstate,
+			__gconv_transform_end_rstate)
+
+BUILTIN_TRANSFORMATION ("\\([^/]+\\)/UTF8/\\([^/]*\\)", NULL, 0,
+			"\\1/UCS4/\\2", 1, "=utf8->ucs4",
+			__gconv_transform_utf8_ucs4,
+			__gconv_transform_init_rstate,
+			__gconv_transform_end_rstate)
+
+BUILTIN_TRANSFORMATION ("\\(.*\\)", NULL, 0, "\\1", 1, "=dummy",
+			__gconv_transform_dummy, NULL, NULL)
diff --git a/iconv/gconv_close.c b/iconv/gconv_close.c
new file mode 100644
index 0000000000..d3d023f488
--- /dev/null
+++ b/iconv/gconv_close.c
@@ -0,0 +1,64 @@
+/* Release any resource associated with given conversion descriptor.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <gconv.h>
+#include <stdlib.h>
+
+
+int
+__gconv_close (gconv_t cd)
+{
+  struct gconv_step *srunp;
+  struct gconv_step_data *drunp;
+  size_t nsteps;
+
+  /* Free all resources by calling destructor functions and release
+     the implementations.  */
+  srunp = cd->steps;
+  nsteps = cd->nsteps;
+  drunp = cd->data;
+  do
+    {
+      /* Call destructor.  */
+      if (srunp->end_fct != NULL)
+	(*srunp->end_fct) (drunp);
+      else
+	{
+	  free (drunp->outbuf);
+	  if (drunp->data != NULL)
+	    free (drunp->data);
+	}
+
+      /* Next step.  */
+      ++srunp;
+      ++drunp;
+    }
+  while (!drunp->is_last);
+
+  /* Save the pointer, we need it below.  */
+  srunp = cd->steps;
+
+  /* Free the data allocated for the descriptor.  */
+  free (cd->data);
+  free (cd);
+
+  /* Close the participating modules.  */
+  return __gconv_close_transform (srunp, nsteps);
+}
diff --git a/iconv/gconv_conf.c b/iconv/gconv_conf.c
new file mode 100644
index 0000000000..d3c13d75c9
--- /dev/null
+++ b/iconv/gconv_conf.c
@@ -0,0 +1,420 @@
+/* Handle configuration data.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <ctype.h>
+#include <gconv.h>
+#include <search.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/param.h>
+
+
+/* This is the default path where we look for module lists.  */
+static const char default_gconv_path[] = GCONV_PATH;
+
+/* Name of the file containing the module information in the directories
+   along the path.  */
+static const char gconv_conf_filename[] = "gconv-modules";
+
+/* We have a few builtin transformations.  */
+static struct gconv_module builtin_modules[] =
+{
+#define BUILTIN_TRANSFORMATION(From, ConstPfx, ConstLen, To, Cost, Name, \
+			       Fct, Init, End) \
+  {									      \
+    from_pattern: From,							      \
+    from_constpfx: ConstPfx,						      \
+    from_constpfx_len: ConstLen,					      \
+    from_regex: NULL,							      \
+    to_string: To,							      \
+    cost: Cost,								      \
+    module_name: Name							      \
+  },
+
+#include "gconv_builtin.h"
+};
+
+
+/* Function for searching module.  */
+static int
+module_compare (const void *p1, const void *p2)
+{
+  struct gconv_module *s1 = (struct gconv_module *) p1;
+  struct gconv_module *s2 = (struct gconv_module *) p2;
+  int result;
+
+  if (s1->from_pattern == NULL)
+    {
+      if (s2->from_pattern == NULL)
+	result = strcmp (s1->from_constpfx, s2->from_constpfx);
+      else
+	result = -1;
+    }
+  else if (s2->from_pattern == NULL)
+    result = 1;
+  else
+    result = strcmp (s1->from_pattern, s2->from_pattern);
+
+  if (result == 0)
+    result = strcmp (s1->to_string, s2->to_string);
+
+  return result;
+}
+
+
+/* Add new alias.  */
+static inline void
+add_alias (char *rp)
+{
+  /* We now expect two more string.  The strings are normalized
+     (converted to UPPER case) and strored in the alias database.  */
+  struct gconv_alias *new_alias;
+  char *from, *to, *wp;
+
+  while (isspace (*rp))
+    ++rp;
+  from = wp = rp;
+  while (*rp != '\0' && !isspace (*rp))
+    ++rp;
+  if (*rp == '\0')
+    /* There is no `to' string on the line.  Ignore it.  */
+    return;
+  *rp++ = '\0';
+  to = wp = rp;
+  while (isspace (*rp))
+    ++rp;
+  while (*rp != '\0' && !isspace (*rp))
+    *wp++ = *rp++;
+  if (to == wp)
+    /* No `to' string, ignore the line.  */
+    return;
+  *wp++ = '\0';
+
+  new_alias = (struct gconv_alias *)
+    malloc (sizeof (struct gconv_alias) + (wp - from));
+  new_alias->fromname = memcpy ((char *) new_alias
+				+ sizeof (struct gconv_alias),
+				from, to - from);
+  new_alias->toname = memcpy ((char *) new_alias + sizeof (struct gconv_alias)
+			      + (to - from), to, wp - to);
+
+  if (__tsearch (new_alias, &__gconv_alias_db, __gconv_alias_compare) == NULL)
+    /* Something went wrong, free this entry.  */
+    free (new_alias);
+}
+
+
+/* Add new module.  */
+static inline void
+add_module (char *rp, const char *directory, size_t dir_len, void **modules,
+	    size_t *nmodules)
+{
+  /* We expect now
+     1. `from' name
+     2. `to' name
+     3. filename of the module
+     4. an optional cost value
+  */
+  struct gconv_module *new_module;
+  char *from, *to, *module, *wp;
+  size_t const_len;
+  int from_is_regex;
+  int cost;
+
+  while (isspace (*rp))
+    ++rp;
+  from = rp;
+  from_is_regex = 0;
+  while (*rp != '\0' && !isspace (*rp))
+    {
+      if (!isalnum (*rp) && *rp != '-' && *rp != '/' && *rp != '.'
+	  && *rp != '_')
+	from_is_regex = 1;
+      ++rp;
+    }
+  if (*rp == '\0')
+    return;
+  *rp++ = '\0';
+  to = wp = rp;
+  while (isspace (*rp))
+    ++rp;
+  while (*rp != '\0' && !isspace (*rp))
+    *wp++ = *rp++;
+  if (*rp == '\0')
+    return;
+  *wp++ = '\0';
+  do
+    ++rp;
+  while (isspace (*rp));
+  module = wp;
+  while (*rp != '\0' && !isspace (*rp))
+    *wp++ = *rp++;
+  if (*rp == '\0')
+    {
+      /* There is no cost, use one by default.  */
+      *wp++ = '\0';
+      cost = 1;
+    }
+  else
+    {
+      /* There might be a cost value.  */
+      char *endp;
+
+      *wp++ = '\0';
+      cost = strtol (rp, &endp, 10);
+      if (rp == endp)
+	/* No useful information.  */
+	cost = 1;
+    }
+
+  if (module[0] == '\0')
+    /* No module name given.  */
+    return;
+  if (module[0] == '/')
+    dir_len = 0;
+  else
+    /* Increment by one for the slash.  */
+    ++dir_len;
+
+  /* We've collected all the information, now create an entry.  */
+
+  const_len = 0;
+  if (from_is_regex)
+    do
+      ++const_len;
+    while (isalnum (from[const_len]) || from[const_len] == '-'
+	   || from[const_len] == '/' || from[const_len] == '.'
+	   || from[const_len] == '_');
+
+  new_module = (struct gconv_module *) malloc (sizeof (struct gconv_module)
+					       + (wp - from) + const_len
+					       + dir_len);
+  if (new_module != NULL)
+    {
+      if (from_is_regex)
+	{
+	  new_module->from_pattern = memcpy ((char *) new_module
+					     + sizeof (struct gconv_module),
+					     from, to - from);
+	  new_module->from_constpfx = memcpy ((char *) new_module->from_pattern
+					      + (to - from),
+					      from, const_len);
+	  ((char *) new_module->from_constpfx)[const_len] = '\0';
+	  new_module->from_constpfx_len = const_len;
+	  ++const_len;
+	}
+      else
+	{
+	  new_module->from_pattern = NULL;
+	  new_module->from_constpfx = memcpy ((char *) new_module
+					      + sizeof (struct gconv_module),
+					      from, to - from);
+	  new_module->from_constpfx_len = to - from - 1;
+	  const_len = to - from;
+	}
+      new_module->from_regex = NULL;
+
+      new_module->to_string = memcpy ((char *) new_module->from_constpfx
+				      + const_len + 1, to, module - to);
+
+      new_module->cost = cost;
+
+      if (dir_len == 0)
+	new_module->module_name = memcpy ((char *) new_module->to_string
+					  + (module - to),
+					  module, wp - module);
+      else
+	{
+	  char *tmp;
+	  new_module->module_name = ((char *) new_module->to_string
+				     + (module - to));
+	  tmp = __mempcpy ((char *) new_module->module_name,
+			   directory, dir_len - 1);
+	  *tmp++ = '/';
+	  memcpy (tmp, module, wp - module);
+	}
+
+      if (__tfind (new_module, *modules, module_compare) != NULL)
+	if (__tsearch (new_module, modules, module_compare) == NULL)
+	  /* Something went wrong while inserting the new module.  */
+	  free (new_module);
+	else
+	  ++*nmodules;
+    }
+}
+
+
+static void
+insert_module (const void *nodep, VISIT value, int level)
+{
+  if (value == preorder || value == leaf)
+    __gconv_modules_db[__gconv_nmodules++] = (struct gconv_module *) nodep;
+}
+
+static void
+nothing (void *unused __attribute__ ((unused)))
+{
+}
+
+
+/* Read the next configuration file.  */
+static void
+internal_function
+read_conf_file (const char *filename, const char *directory, size_t dir_len,
+		void **modules, size_t *nmodules)
+{
+  FILE *fp = fopen (filename, "r");
+  char *line = NULL;
+  size_t line_len = 0;
+
+  /* Don't complain if a file is not present or readable, simply silently
+     ignore it.  */
+  if (fp == NULL)
+    return;
+
+  /* Process the known entries of the file.  Comments start with `#' and
+     end with the end of the line.  Empty lines are ignored.  */
+  while (!feof (fp))
+    {
+      char *rp, *endp, *word;
+      ssize_t n = __getdelim (&line, &line_len, '\n', fp);
+      if (n < 0)
+	/* An error occurred.  */
+	break;
+
+      rp = line;
+      while (isspace (*rp))
+	++rp;
+      /* Terminate the line (excluding comments or newline) by an NUL byte
+	 to simplify the following code.  */
+      endp = strchr (rp, '#');
+      if (endp != NULL)
+	*endp = '\0';
+      else
+	{
+	  endp = strchr (rp, '\n');
+	  if (endp != NULL)
+	    *endp = '\0';
+	}
+
+      /* If this is an empty line go on with the next one.  */
+      if (rp == endp)
+	continue;
+
+      word = rp;
+      while (*rp != '\0' && !isspace (*rp))
+	++rp;
+
+      if (rp - word == sizeof ("alias") - 1
+	  && memcpy (word, "alias", sizeof ("alias") - 1) == 0)
+	add_alias (rp);
+      else if (rp - word == sizeof ("module") - 1
+	       && memcpy (word, "module", sizeof ("module") - 1) == 0)
+	add_module (rp, directory, dir_len, modules, nmodules);
+      /* else */
+	/* Otherwise ignore the line.  */
+    }
+
+  if (line != NULL)
+    free (line);
+  fclose (fp);
+}
+
+
+/* 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;
+
+  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);
+      char *tmp;
+
+      gconv_path = alloca (user_len + 1 + sizeof (default_gconv_path));
+      tmp = __mempcpy (gconv_path, user_path, user_len);
+      *tmp++ = ':';
+      __mempcpy (tmp, default_gconv_path, sizeof (default_gconv_path));
+    }
+
+  elem = strtok_r (gconv_path, ":", &gconv_path);
+  while (elem != NULL)
+    {
+      char real_elem[MAXPATHLEN];
+
+      if (realpath (elem, real_elem) != NULL)
+	{
+	  size_t elem_len = strlen (real_elem);
+	  char *filename, *tmp;
+
+	  filename = alloca (elem_len + 1 + sizeof (gconv_conf_filename));
+	  tmp = __mempcpy (filename, real_elem, elem_len);
+	  *tmp++ = '/';
+	  __mempcpy (tmp, gconv_conf_filename, sizeof (gconv_conf_filename));
+
+	  /* 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);
+    }
+
+  /* If the configuration files do not contain any valid module specification
+     remember this by setting the pointer to the module array to NULL.  */
+  nmodules = sizeof (builtin_modules) / sizeof (struct gconv_module);
+  if (nmodules == 0)
+    {
+      __gconv_modules_db = NULL;
+      return;
+    }
+
+  __gconv_modules_db =
+    (struct gconv_module **) malloc (nmodules * sizeof (struct gconv_module));
+  if (__gconv_modules_db == NULL)
+    /* We cannot do anything.  */
+    return;
+
+  /* First insert the builtin transformations.  */
+  while (__gconv_nmodules < (sizeof (builtin_modules)
+			     / sizeof (struct gconv_module)))
+    {
+      __gconv_modules_db[__gconv_nmodules] =
+	&builtin_modules[__gconv_nmodules];
+      ++__gconv_nmodules;
+    }
+
+  /* Insert all module entries into the array.  */
+  __twalk (modules, insert_module);
+
+  /* No remove the tree data structure.  */
+  __tdestroy (modules, nothing);
+}
diff --git a/iconv/gconv_db.c b/iconv/gconv_db.c
new file mode 100644
index 0000000000..ceb94be2b1
--- /dev/null
+++ b/iconv/gconv_db.c
@@ -0,0 +1,538 @@
+/* Provide access to the collection of available transformation modules.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <gconv.h>
+#include <search.h>
+#include <stdlib.h>
+#include <string.h>
+#include <bits/libc-lock.h>
+
+
+/* Simple data structure for alias mapping.  We have two names, `from'
+   and `to'.  */
+void *__gconv_alias_db;
+
+/* Array with available modules.  */
+size_t __gconv_nmodules;
+struct gconv_module **__gconv_modules_db;
+
+
+/* Function for searching alias.  */
+int
+__gconv_alias_compare (const void *p1, const void *p2)
+{
+  struct gconv_alias *s1 = (struct gconv_alias *) p1;
+  struct gconv_alias *s2 = (struct gconv_alias *) p2;
+  return __strcasecmp (s1->fromname, s2->fromname);
+}
+
+
+/* To search for a derivation we create a list of intermediate steps.
+   Each element contains a pointer to the element which precedes it
+   in the derivation order.  */
+struct derivation_step
+{
+  const char *result_set;
+  struct gconv_module *code;
+  struct derivation_step *last;
+  struct derivation_step *next;
+};
+
+#define NEW_STEP(result, module, last_mod) \
+  ({ struct derivation_step *newp = alloca (sizeof (struct derivation_step)); \
+     newp->result_set = result;						      \
+     newp->code = module;						      \
+     newp->last = last_mod;						      \
+     newp->next = NULL;							      \
+     newp; })
+
+
+/* If a specific transformation is used more than once we should not need
+   to start looking for it again.  Instead cache each successful result.  */
+struct known_derivation
+{
+  const char *from;
+  const char *to;
+  struct gconv_step *steps;
+  size_t nsteps;
+};
+
+/* Compare function for database of found derivations.  */
+static int
+derivation_compare (const void *p1, const void *p2)
+{
+  struct known_derivation *s1 = (struct known_derivation *) p1;
+  struct known_derivation *s2 = (struct known_derivation *) p2;
+  int result;
+
+  result = strcmp (s1->from, s2->from);
+  if (result == 0)
+    result = strcmp (s1->to, s2->to);
+  return result;
+}
+
+/* The search tree for known derivations.  */
+static void *known_derivations;
+
+/* Look up whether given transformation was already requested before.  */
+static int
+derivation_lookup (const char *fromset, const char *toset,
+		   struct gconv_step **handle, size_t *nsteps)
+{
+  struct known_derivation key = { fromset, toset, NULL, 0 };
+  struct known_derivation *result;
+
+  result = __tfind (&key, known_derivations, derivation_compare);
+
+  if (result == NULL)
+    return GCONV_NOCONV;
+
+  *handle = result->steps;
+  *nsteps = result->nsteps;
+
+  /* Please note that we return GCONV_OK even if the last search for
+     this transformation was unsuccessful.  */
+  return GCONV_OK;
+}
+
+/* Add new derivation to list of known ones.  */
+static void
+add_derivation (const char *fromset, const char *toset,
+		struct gconv_step *handle, size_t nsteps)
+{
+  struct known_derivation *new_deriv;
+  size_t fromset_len = strlen (fromset) + 1;
+  size_t toset_len = strlen (toset) + 1;
+
+  new_deriv = (struct known_derivation *)
+    malloc (sizeof (struct known_derivation) + fromset_len + toset_len);
+  if (new_deriv != NULL)
+    {
+      new_deriv->from = memcpy ((char *) new_deriv
+				+ sizeof (struct known_derivation),
+				fromset, fromset_len);
+      new_deriv->to = memcpy ((char *) new_deriv->from + fromset_len,
+			      toset, toset_len);
+
+      new_deriv->steps = handle;
+      new_deriv->nsteps = nsteps;
+
+      __tsearch (new_deriv, &known_derivations, derivation_compare);
+    }
+  /* Please note that we don't complain if the allocation failed.  This
+     is not tragically but in case we use the memory debugging facilities
+     not all memory will be freed.  */
+}
+
+static void
+free_derivation (void *p)
+{
+  struct known_derivation *deriv = (struct known_derivation *) p;
+
+  free ((struct gconv_step *) deriv->steps);
+  free (deriv);
+}
+
+
+static int
+internal_function
+gen_steps (struct derivation_step *best, const char *toset,
+	   const char *fromset, struct gconv_step **handle, size_t *nsteps)
+{
+  size_t step_cnt = 0;
+  struct gconv_step *result;
+  struct derivation_step *current;
+  int status = GCONV_NOMEM;
+
+  /* First determine number of steps.  */
+  for (current = best; current->last != NULL; current = current->last)
+    ++step_cnt;
+
+  result = (struct gconv_step *) malloc (sizeof (struct gconv_step)
+					 * step_cnt);
+  if (result != NULL)
+    {
+      current = best;
+      while (step_cnt-- > 0)
+	{
+	  result[step_cnt].from_name = current->last->result_set;
+	  result[step_cnt].to_name = current->result_set;
+
+	  if (current->code->module_name[0] == '/')
+	    {
+	      /* Load the module, return handle for it.  */
+	      void *shlib_handle =
+		__gconv_find_shlib (current->code->module_name);
+
+	      if (shlib_handle == NULL)
+		break;
+
+	      result[step_cnt].shlib_handle = shlib_handle;
+
+	      result[step_cnt].fct = __gconv_find_func (shlib_handle, "gconv");
+	      if (result[step_cnt].fct == NULL)
+		{
+		  /* Argh, no conversion function.  There is something
+		     wrong here.  */
+		  __gconv_release_shlib (result[step_cnt].shlib_handle);
+		  break;
+		}
+
+	      result[step_cnt].init_fct = __gconv_find_func (shlib_handle,
+							     "gconv_init");
+	      result[step_cnt].end_fct = __gconv_find_func (shlib_handle,
+							    "gconv_end");
+	    }
+	  else
+	    /* It's a builtin transformation.  */
+	    __gconv_get_builtin_trans (current->code->module_name,
+				       &result[step_cnt]);
+
+	  current = current->last;
+	}
+
+      if (step_cnt != 0)
+	{
+	  /* Something went wrong while initializing the modules.  */
+	  while (step_cnt-- > 0)
+	    __gconv_release_shlib (result[step_cnt].shlib_handle);
+	  free (result);
+	  status = GCONV_NOCONV;
+	}
+      else
+	{
+	  *handle = result;
+	  *nsteps = step_cnt;
+	  status = GCONV_OK;
+	}
+    }
+
+  return status;
+}
+
+
+/* The main function: find a possible derivation from the `fromset' (either
+   the given name or the alias) to the `toset' (again with alias).  */
+static int
+find_derivation (const char *toset, const char *toset_expand,
+		 const char *fromset, const char *fromset_expand,
+		 struct gconv_step **handle, size_t *nsteps)
+{
+  __libc_lock_define_initialized (static, lock)
+  struct derivation_step *current, **lastp, *best = NULL;
+  int best_cost = 0;
+  int result;
+
+  result = derivation_lookup (fromset_expand ?: fromset, toset_expand ?: toset,
+			      handle, nsteps);
+  if (result == GCONV_OK)
+    return result;
+
+  __libc_lock_lock (lock);
+
+  /* There is a small chance that this derivation is meanwhile found.  This
+     can happen if in `find_derivation' we look for this derivation, didn't
+     find it but at the same time another thread looked for this derivation. */
+  result = derivation_lookup (fromset_expand ?: fromset, toset_expand ?: toset,
+			      handle, nsteps);
+  if (result == GCONV_OK)
+    return result;
+
+  /* ### TODO
+     For now we use a simple algorithm with quadratic runtime behaviour.
+     The task is to match the `toset' with any of the available.  */
+  if (fromset_expand != NULL)
+    {
+      current = NEW_STEP (fromset_expand, NULL, NULL);
+      current->next = NEW_STEP (fromset, NULL, NULL);
+      lastp = &current->next->next;
+    }
+  else
+    {
+      current = NEW_STEP (fromset, NULL, NULL);
+      lastp = &current->next;
+    }
+
+  while (current != NULL)
+    {
+      /* Now match all the available module specifications against the
+         current charset name.  If any of them matches check whether
+         we already have a derivation for this charset.  If yes, use the
+         one with the lower costs.  Otherwise add the new charset at the
+         end.  */
+      size_t cnt;
+
+      for (cnt = 0; cnt < __gconv_nmodules; ++cnt)
+        {
+	  const char *result_set = NULL;
+
+	  if (__gconv_modules_db[cnt]->from_pattern == NULL)
+	    {
+	      if (__strcasecmp (current->result_set,
+				__gconv_modules_db[cnt]->from_constpfx) == 0)
+		{
+		  if (strcmp (__gconv_modules_db[cnt]->to_string, "-") == 0)
+		    result_set = toset_expand ?: toset;
+		  else
+		    result_set = __gconv_modules_db[cnt]->to_string;
+		}
+	    }
+	  else
+	    /* We have a regular expression.  First see if the prefix
+	       matches.  */
+	    if (__strncasecmp (current->result_set,
+			       __gconv_modules_db[cnt]->from_constpfx,
+			       __gconv_modules_db[cnt]->from_constpfx_len)
+		== 0)
+	      {
+		/* First compile the regex if not already done.  */
+		if (__gconv_modules_db[cnt]->from_regex == NULL)
+		  {
+		    regex_t *newp = (regex_t *) malloc (sizeof (regex_t));
+
+		    if (regcomp (newp, __gconv_modules_db[cnt]->from_pattern,
+				 REG_EXTENDED | REG_ICASE) != 0)
+		      {
+			/* Something is wrong.  Remember this.  */
+			free (newp);
+			__gconv_modules_db[cnt]->from_regex = (regex_t *) -1L;
+		      }
+		    else
+		      __gconv_modules_db[cnt]->from_regex = newp;
+		  }
+
+		if (__gconv_modules_db[cnt]->from_regex != (regex_t *) -1L)
+		  {
+		    /* Try to match the from name.  */
+		    regmatch_t match[4];
+
+		    if (regexec (__gconv_modules_db[cnt]->from_regex,
+				 current->result_set, 4, match, 0) == 0
+			&& match[0].rm_so == 0
+			&& current->result_set[match[0].rm_eo] == '\0')
+		      {
+			/* At least the whole <from> string is matched.
+			   We must now match sed-like possible
+			   subexpressions from the match to the
+			   toset expression.  */
+#define ENSURE_LEN(LEN) \
+  if (wp + (LEN) >= constr + len - 1)					      \
+    {									      \
+      char *newp = alloca (len += 128);					      \
+      memcpy (newp, constr, wp - constr);				      \
+      wp = newp + (wp - constr);					      \
+      constr = newp;							      \
+    }
+			size_t len = 128;
+			char *constr = alloca (len);
+			char *wp = constr;
+			const char *cp = __gconv_modules_db[cnt]->to_string;
+
+			while (*cp != '\0')
+			  {
+			    if (*cp != '\\')
+			      {
+				ENSURE_LEN (1);
+				*wp++ = *cp++;
+			      }
+			    else if (cp[1] == '\0')
+			      /* Backslash at end of string.  */
+			      break;
+			    else
+			      {
+				++cp;
+				if (*cp == '\\')
+				  {
+				    *wp++ = *cp++;
+				    ENSURE_LEN (1);
+				  }
+				else if (*cp < '1' || *cp > '3')
+				  break;
+				else
+				  {
+				    int idx = *cp - '0';
+				    if (match[idx].rm_so == -1)
+				      /* No match.  */
+				      break;
+
+				    ENSURE_LEN (match[idx].rm_eo
+						- match[idx].rm_so);
+				    wp = __mempcpy (wp,
+						    &current->result_set[match[idx].rm_so],
+						    match[idx].rm_eo
+						    - match[idx].rm_so);
+				    ++cp;
+				  }
+			      }
+			  }
+			if (*cp == '\0' && wp != constr)
+			  {
+                                /* Terminate the constructed string.  */
+			    *wp = '\0';
+			    result_set = constr;
+			  }
+		      }
+		  }
+	      }
+
+	  if (result_set != NULL)
+	    {
+	      /* We managed to find a derivation.  First see whether
+		 this is what we are looking for.  */
+	      if (__strcasecmp (result_set, toset) == 0
+		  || (toset_expand != NULL
+		      && __strcasecmp (result_set, toset_expand) == 0))
+		{
+		  /* Determine the costs.  If they are lower than the
+		     previous solution (or this is the first solution)
+		     remember this solution.  */
+		  int cost = __gconv_modules_db[cnt]->cost;
+		  struct derivation_step *runp = current;
+		  while (runp->code != NULL)
+		    {
+		      cost += runp->code->cost;
+		      runp = runp->last;
+		    }
+		  if (best == NULL || cost < best_cost)
+		    {
+		      best = NEW_STEP (result_set, __gconv_modules_db[cnt],
+				       current);
+		      best_cost = cost;
+		    }
+		}
+	      else
+		{
+		  /* Append at the end.  */
+		  *lastp = NEW_STEP (result_set, __gconv_modules_db[cnt],
+				     current);
+		  lastp = &(*lastp)->next;
+                }
+	    }
+	}
+    }
+
+  if (best != NULL)
+    /* We really found a way to do the transformation.  Now build a data
+       structure describing the transformation steps.*/
+    result = gen_steps (best, toset_expand ?: toset, fromset_expand ?: fromset,
+			handle, nsteps);
+  else
+    {
+      /* We haven't found a transformation.  Clear the result values.  */
+      *handle = NULL;
+      *nsteps = 0;
+    }
+
+  /* Add result in any case to list of known derivations.  */
+  add_derivation (fromset_expand ?: fromset, toset_expand ?: toset,
+		  *handle, *nsteps);
+
+  __libc_lock_unlock (lock);
+
+  return result;
+}
+
+
+int
+__gconv_find_transform (const char *toset, const char *fromset,
+			struct gconv_step **handle, size_t *nsteps)
+{
+  __libc_once_define (static, once);
+  const char *fromset_expand = NULL;
+  const char *toset_expand = NULL;
+  int result;
+
+  /* Ensure that the configuration data is read.  */
+  __libc_once (once, __gconv_read_conf);
+
+  /* If we don't have a module database return with an error.  */
+  if (__gconv_modules_db == NULL)
+    return GCONV_NOCONV;
+
+  /* See whether the names are aliases.  */
+  if (__gconv_alias_db != NULL)
+    {
+      struct gconv_alias key;
+      struct gconv_alias *found;
+
+      key.fromname = fromset;
+      found = __tfind (&key, __gconv_alias_db, __gconv_alias_compare);
+      fromset_expand = found != NULL ? found->toname : NULL;
+
+      key.fromname = toset;
+      found = __tfind (&key, __gconv_alias_db, __gconv_alias_compare);
+      toset_expand = found != NULL ? found->toname : NULL;
+    }
+
+  result = find_derivation (toset, toset_expand, fromset, fromset_expand,
+			    handle, nsteps);
+
+  /* The following code is necessary since `find_derivation' will return
+     GCONV_OK even when no derivation was found but the same request
+     was processed before.  I.e., negative results will also be cached.  */
+  return (result == GCONV_OK
+	  ? (*handle == NULL ? GCONV_NOCONV : GCONV_OK)
+	  : result);
+}
+
+
+/* Release the entries of the modules list.  */
+int
+__gconv_close_transform (struct gconv_step *steps, size_t nsteps)
+{
+  int result = GCONV_OK;
+
+  while (nsteps-- > 0)
+    if (steps[nsteps].shlib_handle != NULL)
+      {
+	result = __gconv_release_shlib (steps[nsteps].shlib_handle);
+	if (result != GCONV_OK)
+	  break;
+      }
+
+  return result;
+}
+
+
+/* Free all resources if necessary.  */
+static void __attribute__ ((unused))
+free_mem (void)
+{
+  size_t cnt;
+
+  if (__gconv_alias_db != NULL)
+    __tdestroy (__gconv_alias_db, free);
+
+  for (cnt = 0; cnt < __gconv_nmodules; ++cnt)
+    {
+      if (__gconv_modules_db[cnt]->from_regex != NULL)
+	regfree ((regex_t *) __gconv_modules_db[cnt]->from_regex);
+
+      /* Modules which names do not start with a slash are builtin
+	 transformations and the memory is not allocated dynamically.  */
+      if (__gconv_modules_db[cnt]->module_name[0] == '/')
+	free (__gconv_modules_db[cnt]);
+    }
+
+  if (known_derivations != NULL)
+    __tdestroy (known_derivations, free_derivation);
+}
+
+text_set_element (__libc_subfreeres, free_mem);
diff --git a/iconv/gconv_dl.c b/iconv/gconv_dl.c
new file mode 100644
index 0000000000..a0003a82db
--- /dev/null
+++ b/iconv/gconv_dl.c
@@ -0,0 +1,254 @@
+/* Handle loading/unloading of shared object for transformation.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <dlfcn.h>
+#include <gconv.h>
+#include <inttypes.h>
+#include <link.h>
+#include <search.h>
+#include <stdlib.h>
+#include <string.h>
+#include <bits/libc-lock.h>
+#include <sys/param.h>
+
+
+/* This is a tuning parameter.  If a transformation module is not used
+   anymore it gets not immediately unloaded.  Instead we wait a certain
+   number of load attempts for further modules.  If none of the
+   subsequent load attempts name the same object it finally gets unloaded.
+   Otherwise it is still available which hopefully is the frequent case.
+   The following number is the number of unloading attempts we wait
+   before unloading.  */
+#define TRIES_BEFORE_UNLOAD	2
+
+
+/* Structure describing one loaded shared object.  This normally are
+   objects to perform conversation but as a special case the db shared
+   object is also handled.  */
+struct loaded_object
+{
+  /* Name of the object.  */
+  const char *name;
+
+  /* Reference counter for the db functionality.  If no conversion is
+     needed we unload the db library.  */
+  int counter;
+
+  /* The handle for the shared object.  */
+  void *handle;
+};
+
+
+/* Array of loaded objects.  This is shared by all threads so we have
+   to use semaphores to access it.  */
+static void *loaded;
+__libc_lock_define_initialized (static, lock)
+
+
+
+/* Comparison function for searching `loaded_object' tree.  */
+static int
+known_compare (const void *p1, const void *p2)
+{
+  const struct loaded_object *s1 = (const struct loaded_object *) p1;
+  const struct loaded_object *s2 = (const struct loaded_object *) p2;
+
+  return (intptr_t) s1->handle - (intptr_t) s2->handle;
+}
+
+
+static void
+do_open (void *a)
+{
+  struct loaded_object *args = (struct loaded_object *) a;
+  /* Open and relocate the shared object.  */
+  args->handle = _dl_open (args->name, RTLD_LAZY);
+}
+
+
+static int
+dlerror_run (void (*operate) (void *), void *args)
+{
+  char *last_errstring = NULL;
+  const char *last_object_name = NULL;
+  int result;
+
+  (void) _dl_catch_error (&last_errstring, &last_object_name, operate, args);
+
+  result = last_errstring != NULL;
+  if (result)
+    free (last_errstring);
+
+  return result;
+}
+
+
+struct get_sym_args
+{
+  /* Arguments to get_sym.  */
+  struct link_map *map;
+  const char *name;
+
+  /* Return values of get_sym.  */
+  ElfW(Addr) loadbase;
+  const ElfW(Sym) *ref;
+};
+
+static void
+get_sym (void *a)
+{
+  struct get_sym_args *args = (struct get_sym_args *) a;
+  struct link_map *scope[2] = { args->map, NULL };
+  args->ref = NULL;
+  args->loadbase = _dl_lookup_symbol (args->name, &args->ref,
+				      scope, args->map->l_name, 0);
+}
+
+
+void *
+__gconv_find_func (void *handle, const char *name)
+{
+  struct get_sym_args args;
+
+  args.map = handle;
+  args.name = name;
+
+  return (dlerror_run (get_sym, &args) ? NULL
+	  : (void *) (args.loadbase + args.ref->st_value));
+}
+
+
+
+/* Open the gconv database if necessary.  A non-negative return value
+   means success.  */
+void *
+__gconv_find_shlib (const char *name)
+{
+  void *result = NULL;
+  struct loaded_object *found;
+
+  /* Acquire the lock.  */
+  __libc_lock_lock (lock);
+
+  /* Search the tree of shared objects previously requested.  Data in
+     the tree are `loaded_object' structures, whose first member is a
+     `const char *', the lookup key.  The search returns a pointer to
+     the tree node structure; the first member of the is a pointer to
+     our structure (i.e. what will be a `loaded_object'); since the
+     first member of that is the lookup key string, &FCT_NAME is close
+     enough to a pointer to our structure to use as a lookup key that
+     will be passed to `known_compare' (above).  */
+
+  found = __tfind (&name, loaded, known_compare);
+  if (found == NULL)
+    {
+      /* This name was not known before.  */
+      found = malloc (sizeof (struct loaded_object));
+      if (found != NULL)
+	{
+	  /* Point the tree node at this new structure.  */
+	  found->name = name;
+	  found->counter = -TRIES_BEFORE_UNLOAD - 1;
+	  found->handle = NULL;
+
+	  if (__tsearch (found, &loaded, known_compare) == NULL)
+	    {
+	      /* Something went wrong while inserting the entry.  */
+	      free (found);
+	      found = NULL;
+	    }
+	}
+    }
+
+  /* Try to load the shared object if the usage count is 0.  This
+     implies that if the shared object is not loadable, the handle is
+     NULL and the usage count > 0.  */
+  if (found != NULL)
+    {
+      if (found->counter < -TRIES_BEFORE_UNLOAD)
+	{
+	  if (dlerror_run (do_open, found) == 0)
+	    found->counter = 1;
+	}
+      else if (found->handle != NULL)
+	found->counter = MAX (found->counter + 1, 1);
+
+      result = found->handle;
+    }
+
+  /* Release the lock.  */
+  __libc_lock_unlock (lock);
+
+  return result;
+}
+
+
+/* This is very ugly but the tsearch functions provide no way to pass
+   information to the walker function.  So we use a global variable.
+   It is MT safe since we use a lock.  */
+static void *release_handle;
+
+static void
+do_release_shlib (const void *nodep, VISIT value, int level)
+{
+  struct loaded_object *obj = (struct loaded_object *) nodep;
+
+  if (value != preorder && value != leaf)
+    return;
+
+  if (obj->handle == release_handle)
+    /* This is the object we want to unload.  Now set the release
+       counter to zero.  */
+    obj->counter = 0;
+  else if (obj->counter <= 0)
+    {
+      if (--obj->counter < -TRIES_BEFORE_UNLOAD && obj->handle != NULL)
+	{
+	  /* Unload the shared object.  We don't use the trick to
+	     catch errors since in the case an error is signalled
+	     something is really wrong.  */
+	  _dl_close ((struct link_map *) obj->handle);
+
+	  obj->handle = NULL;
+	}
+    }
+}
+
+
+/* Notify system that a shared object is not longer needed.  */
+int
+__gconv_release_shlib (void *handle)
+{
+  /* Acquire the lock.  */
+  __libc_lock_lock (lock);
+
+  /* Urgh, this is ugly but we have no other possibility.  */
+  release_handle = handle;
+
+  /* Process all entries.  Please note that we also visit entries
+     with release counts <= 0.  This way we can finally unload them
+     if necessary.  */
+  __twalk (loaded, do_release_shlib);
+
+  /* Release the lock.  */
+  __libc_lock_unlock (lock);
+
+  return GCONV_OK;
+}
diff --git a/iconv/gconv_open.c b/iconv/gconv_open.c
new file mode 100644
index 0000000000..0e789df896
--- /dev/null
+++ b/iconv/gconv_open.c
@@ -0,0 +1,123 @@
+/* Find matching transformation algorithms and initialize steps.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <errno.h>
+#include <gconv.h>
+#include <stdlib.h>
+
+
+int
+__gconv_open (const char *toset, const char *fromset, gconv_t *handle)
+{
+  struct gconv_step *steps;
+  size_t nsteps;
+  gconv_t result = NULL;
+  size_t cnt = 0;
+  int res;
+
+  res = __gconv_find_transform (toset, fromset, &steps, &nsteps);
+  if (res == GCONV_OK)
+    {
+      /* Allocate room for handle.  */
+      result = (gconv_t) malloc (sizeof (struct gconv_info));
+      if (result == NULL)
+	res = GCONV_NOMEM;
+      else
+	{
+	  /* Remember the list of steps.  */
+	  result->steps = steps;
+	  result->nsteps = nsteps;
+
+	  /* Allocate array for the step data.  */
+	  result->data = (struct gconv_step_data *)
+	    calloc (nsteps, sizeof (struct gconv_step_data));
+
+	  if (result->data == NULL)
+	    res = GCONV_NOMEM;
+	  else
+	    {
+	      /* Call all initialization functions for the transformation
+		 step implemenations.  */
+	      struct gconv_step_data *data = result->data;
+
+	      for (cnt = 0; cnt < nsteps; ++cnt)
+		{
+		  /* If this is the last step we must not allocate an output
+		     buffer.  Signal this to the initializer.  */
+		  data[cnt].is_last = cnt == nsteps - 1;
+
+		  if (steps[cnt].init_fct != NULL)
+		    {
+		      res = (steps[cnt].init_fct) (&steps[cnt], &data[cnt]);
+		      if (res != GCONV_OK)
+			break;
+		    }
+		  else
+		    if (!data[cnt].is_last)
+		      {
+			data[cnt].outbufsize = GCONV_DEFAULT_BUFSIZE;
+			data[cnt].outbuf =
+			  (char *) malloc (data[cnt].outbufsize);
+			if (data[cnt].outbuf == NULL)
+			  {
+			    res = GCONV_NOMEM;
+			    break;
+			  }
+			data[cnt].outbufavail = 0;
+		      }
+		}
+	    }
+	}
+    }
+
+  if (res != GCONV_OK)
+    {
+      /* Something went wrong.  Free all the resources.  */
+      int serrno = errno;
+
+      if (result != NULL)
+	{
+	  if (result->data != NULL)
+	    {
+	      while (cnt-- > 0)
+		if (steps[cnt].end_fct != NULL)
+		  (*steps[cnt].end_fct) (&result->data[cnt]);
+		else
+		  {
+		    free (result->data[cnt].outbuf);
+		    if (result->data[cnt].data != NULL)
+		      free (result->data[cnt].data);
+		  }
+
+	      free (result->data);
+	    }
+
+	  free (result);
+	  result = NULL;
+	}
+
+      __gconv_close_transform (steps, nsteps);
+
+      __set_errno (serrno);
+    }
+
+  *handle = result;
+  return res;
+}
diff --git a/iconv/gconv_simple.c b/iconv/gconv_simple.c
new file mode 100644
index 0000000000..91a347b058
--- /dev/null
+++ b/iconv/gconv_simple.c
@@ -0,0 +1,240 @@
+/* Simple transformations functions.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <gconv.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+#include <sys/param.h>
+
+
+int
+__gconv_transform_dummy (struct gconv_step *step, struct gconv_step_data *data,
+			 const char *inbuf, size_t *inlen, size_t *written,
+			 int do_flush)
+{
+  size_t do_write;
+
+  /* We have no stateful encoding.  So we don't have to do anything
+     special.  */
+  if (do_flush)
+    do_write = 0;
+  else
+    {
+      do_write = MIN (*inlen, data->outbufsize - data->outbufavail);
+
+      memcpy (data->outbuf, inbuf, do_write);
+
+      *inlen -= do_write;
+      data->outbufavail += do_write;
+    }
+
+  /* ### TODO Actually, this number must be devided according to the
+     size of the input charset.  I.e., if the input is in UCS4 the
+     number of copied bytes must be divided by 4.  */
+  if (written != NULL)
+    *written = do_write;
+
+  return GCONV_OK;
+}
+
+
+int
+__gconv_transform_init_rstate (struct gconv_step *step,
+			       struct gconv_step_data *data)
+{
+  /* We have to provide the transformation function an correctly initialized
+     object of type `mbstate_t'.  This must be dynamically allocated.  */
+  data->data = calloc (1, sizeof (mbstate_t));
+
+  return data->data == NULL ? GCONV_NOMEM : GCONV_OK;
+}
+
+
+void
+__gconv_transform_end_rstate (struct gconv_step_data *data)
+{
+  if (data->data != NULL)
+    free (data->data);
+}
+
+
+int
+__gconv_transform_ucs4_utf8 (struct gconv_step *step,
+			     struct gconv_step_data *data, const char *inbuf,
+			     size_t *inlen, size_t *written, int do_flush)
+{
+  struct gconv_step *next_step = step + 1;
+  struct gconv_step_data *next_data = data + 1;
+  gconv_fct fct = next_step->fct;
+  size_t do_write;
+  int result;
+
+  /* If the function is called with no input this means we have to reset
+     to the initial state.  The possibly partly converted input is
+     dropped.  */
+  if (do_flush)
+    {
+      /* Clear the state.  */
+      memset (data->data, '\0', sizeof (mbstate_t));
+      do_write = 0;
+
+      /* Call the steps down the chain if there are any.  */
+      if (data->is_last)
+	result = GCONV_OK;
+      else
+	{
+	  struct gconv_step *next_step = step + 1;
+	  struct gconv_step_data *next_data = data + 1;
+
+	  result = (*fct) (next_step, next_data, NULL, 0, written, 1);
+
+	  /* Clear output buffer.  */
+	  data->outbufavail = 0;
+	}
+    }
+  else
+    {
+      do_write = 0;
+
+      do
+	{
+	  const char *newinbuf = inbuf;
+	  size_t actually = __wcsnrtombs (&data->outbuf[data->outbufavail],
+					  (const wchar_t **) &newinbuf,
+					  *inlen / sizeof (wchar_t),
+					  data->outbufsize - data->outbufavail,
+					  (mbstate_t *) data->data);
+
+	  /* Status so far.  */
+	  result = GCONV_EMPTY_INPUT;
+
+	  /* Remember how much we converted.  */
+	  do_write += newinbuf - inbuf;
+	  *inlen -= (newinbuf - inbuf) * sizeof (wchar_t);
+
+	  data->outbufavail += actually;
+	  if (data->outbufavail > 0)
+	    {
+	      /* Call the functions below in the chain.  */
+	      size_t newavail = data->outbufavail;
+
+	      result = (*fct) (next_step, next_data, data->outbuf, &newavail,
+			       written, 0);
+
+	      /* Correct the output buffer.  */
+	      if (newavail != data->outbufavail)
+		{
+		  memmove (data->outbuf,
+			   &data->outbuf[data->outbufavail - newavail],
+			   newavail);
+		  data->outbufavail = newavail;
+		}
+	    }
+	}
+      while (*inlen > 0 && result == GCONV_EMPTY_INPUT);
+    }
+
+  if (written != NULL && data->is_last)
+    *written = do_write / sizeof (wchar_t);
+
+  return result;
+}
+
+
+int
+__gconv_transform_utf8_ucs4 (struct gconv_step *step,
+			     struct gconv_step_data *data, const char *inbuf,
+			     size_t *inlen, size_t *written, int do_flush)
+{
+  struct gconv_step *next_step = step + 1;
+  struct gconv_step_data *next_data = data + 1;
+  gconv_fct fct = next_step->fct;
+  size_t do_write;
+  int result;
+
+  /* If the function is called with no input this means we have to reset
+     to the initial state.  The possibly partly converted input is
+     dropped.  */
+  if (do_flush)
+    {
+      /* Clear the state.  */
+      memset (data->data, '\0', sizeof (mbstate_t));
+      do_write = 0;
+
+      /* Call the steps down the chain if there are any.  */
+      if (data->is_last)
+	result = GCONV_OK;
+      else
+	{
+	  struct gconv_step *next_step = step + 1;
+	  struct gconv_step_data *next_data = data + 1;
+
+	  result = (*fct) (next_step, next_data, NULL, 0, written, 1);
+	}
+    }
+  else
+    {
+      do_write = 0;
+
+      do
+	{
+	  const char *newinbuf = inbuf;
+	  size_t actually = __mbsnrtowcs ((wchar_t *) &data->outbuf[data->outbufavail],
+					  &newinbuf, *inlen,
+					  ((data->outbufsize
+					    - data->outbufavail)
+					   / sizeof (wchar_t)),
+					  (mbstate_t *) data->data);
+
+	  /* Status so far.  */
+	  result = GCONV_EMPTY_INPUT;
+
+	  /* Remember how much we converted.  */
+	  do_write += actually;
+	  *inlen -= newinbuf - inbuf;
+
+	  data->outbufavail += actually * sizeof (wchar_t);
+	  if (data->outbufavail > 0)
+	    {
+	      /* Call the functions below in the chain.  */
+	      size_t newavail = data->outbufavail;
+
+	      result = (*fct) (next_step, next_data, data->outbuf, &newavail,
+			       written, 0);
+
+	      /* Correct the output buffer.  */
+	      if (newavail != data->outbufavail)
+		{
+		  memmove (data->outbuf,
+			   &data->outbuf[data->outbufavail - newavail],
+			   newavail);
+		  data->outbufavail = newavail;
+		}
+	    }
+	}
+      while (*inlen > 0 && result == GCONV_EMPTY_INPUT);
+    }
+
+  if (written != NULL && data->is_last)
+    *written = do_write;
+
+  return GCONV_OK;
+}
diff --git a/iconv/iconv.c b/iconv/iconv.c
new file mode 100644
index 0000000000..e5b0eb7c0d
--- /dev/null
+++ b/iconv/iconv.c
@@ -0,0 +1,38 @@
+/* Convert characters in input buffer using conversion descriptor to
+   output buffer.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <iconv.h>
+#include <gconv.h>
+
+
+size_t
+iconv (iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf,
+       size_t *outbytesleft)
+{
+  gconv_t gcd = (gconv_t) cd;
+  size_t converted;
+
+  if (__gconv (gcd, inbuf, inbytesleft, outbuf, outbytesleft, &converted)
+      != GCONV_OK)
+    return (size_t) -1;
+
+  return converted;
+}
diff --git a/iconv/iconv.h b/iconv/iconv.h
new file mode 100644
index 0000000000..ceb120d4f3
--- /dev/null
+++ b/iconv/iconv.h
@@ -0,0 +1,50 @@
+/* Copyright (C) 1997 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 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.  */
+
+#ifndef _ICONV_H
+#define _ICONV_H	1
+
+#include <features.h>
+#define __need_size_t
+#include <stddef.h>
+
+
+__BEGIN_DECLS
+
+/* Identifier for conversion method from one codeset to another.  */
+typedef void *iconv_t;
+
+
+/* Allocate descriptor for code conversion from codeset FROMCODE to
+   codeset TOCODE.  */
+extern iconv_t iconv_open __P ((__const char *__tocode,
+				__const char *__fromcode));
+
+/* Convert at most *INBYTESLEFT bytes from *INBUF according to the
+   code conversion algorithm specified by CD and place up to
+   *OUTBYTESLEFT bytes in buffer at *OUTBUF.  */
+extern size_t iconv __P ((iconv_t cd,
+			  __const char **__inbuf, size_t *__inbytesleft,
+			  char **__outbuf, size_t *__outbytesleft));
+
+/* Free resources allocated for descriptor CD for code conversion.  */
+extern int iconv_close __P ((iconv_t __cd));
+
+__END_DECLS
+
+#endif /* iconv.h */
diff --git a/iconv/iconv_close.c b/iconv/iconv_close.c
new file mode 100644
index 0000000000..d3123e21d8
--- /dev/null
+++ b/iconv/iconv_close.c
@@ -0,0 +1,30 @@
+/* Release any resource associated with given conversion descriptor.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <iconv.h>
+
+#include <gconv.h>
+
+
+int
+iconv_close (iconv_t cd)
+{
+  return __gconv_close ((gconv_t) cd) ? -1 : 0;
+}
diff --git a/iconv/iconv_open.c b/iconv/iconv_open.c
new file mode 100644
index 0000000000..dadf3d9dbb
--- /dev/null
+++ b/iconv/iconv_open.c
@@ -0,0 +1,45 @@
+/* Get descriptor for character set conversion.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
+
+   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 <errno.h>
+#include <iconv.h>
+
+#include <gconv.h>
+
+
+iconv_t
+iconv_open (const char *tocode, const char *fromcode)
+{
+  gconv_t cd;
+  int res;
+
+  res = __gconv_open (tocode, fromcode, &cd);
+
+  if (res != GCONV_OK)
+    {
+      /* We must set the error number according to the specs.  */
+      if (res == GCONV_NOCONV || res == GCONV_NODB)
+	__set_errno (EINVAL);
+
+      return (iconv_t) -1;
+    }
+
+  return (iconv_t) cd;
+}