Update. cvs/libc-ud-971125

1997-11-26 04:28  Ulrich Drepper  <drepper@cygnus.com>

	* eld/dl-profile.c (_dl_start_profile): Avoid FP calculation when
	computing s_scale.  Patch by a sun <asun@zoology.washington.edu>.

	* iconv/gconv_close.c: Correct freeing of descriptor data.
	* iconv/gconv_simple.c: Return correct error values for illegal or
	incomplete characters.

	* Makefile (iconvdata/%): Special goal to simplify iconvdata
	development.
	* iconvdata/Makefile: New file.
	* iconvdata/configure: Likewise.
	* iconvdata/extra-module.mk: Likewise.
	* iconvdata/gconv-modules: Likewise.
	* iconvdata/iso6937.c: Likewise.
	* iconvdata/iso8859-1.c: Likewise.
	* iconvdata/iso8859-10.c: Likewise.
	* iconvdata/iso8859-10.h: Likewise.
	* iconvdata/iso8859-2.c: Likewise.
	* iconvdata/iso8859-2.h: Likewise.
	* iconvdata/iso8859-3.c: Likewise.
	* iconvdata/iso8859-3.h: Likewise.
	* iconvdata/iso8859-4.c: Likewise.
	* iconvdata/iso8859-4.h: Likewise.
	* iconvdata/iso8859-5.c: Likewise.
	* iconvdata/iso8859-5.h: Likewise.
	* iconvdata/iso8859-6.c: Likewise.
	* iconvdata/iso8859-6.h: Likewise.
	* iconvdata/iso8859-7.c: Likewise.
	* iconvdata/iso8859-7.h: Likewise.
	* iconvdata/iso8859-8.c: Likewise.
	* iconvdata/iso8859-8.h: Likewise.
	* iconvdata/iso8859-9.c: Likewise.
	* iconvdata/iso8859-9.h: Likewise.
	* iconvdata/iso8859-generic.c: Likewise.
	* iconvdata/t61.c: Likewise.

	* string/Makefile (routines): Add strcasestr.
	* string/string.h: Add prototype for strcasestr.
	* sysdeps/generic/strcasestr.c: New file.
	* wcsmbs/mbrtowc.c: Simplify special case a bit.
	* wcsmbs/wcrtomb.c: Likewise.
	* wcsmbs/mbsnrtowcs.c: Correctly handle incomplete characters.
	* wcsmbs/wcsnrtombs.c: Likewise.
	* wcsmbs/mbsrtowcs.c: Make sure SRC argument is correct when
	partial character is read.
	* wcsmbs/wcsrtombs.c: Likewise.
	* wcsmbs/wmemrtombs.c: Likewise.
	* wcsmbs/wmemrtowcs.c: Likewise.

	* io/ftw.h: Include <sys/stat.h> instead of <bits/stat.h>.
	* login/pty.h: Include <sys/ioctl.h> instead og <bits/ioctl-types.h>.
	* sysdeps/i386/__longjmp.S: Define _SETJMP_H.
	* sysdeps/i386/elf/setjmp.S: Likewise.
	* sysdeps/unix/sysv/linux/kernel_termios.h: Do include
	<bits/termios.h>.

	* sysdeps/posix/mk-stdiolim.c: Output file with comment.
	* sysdeps/unix/sysv/linux/stdio_lim.h.in: Add comment.

	* sysdeps/unix/sysv/linux/sys/mman.h: Pretty print.
	* sysvipc/sys/ipc.h: Likewise.
	* sysvipc/sys/msg.h: Likewise.
	* sysvipc/sys/sem.h: Likewise.
	* sysvipc/sys/shm.h: Likewise.

	* sysdeps/alpha/bits/endian.h: Issue error message if the header is
	used directly.
	* sysdeps/alpha/bits/setjmp.h: Likewise.
	* sysdeps/alpha/fpu/bits/fenv.h: Likewise.
	* sysdeps/arm/bits/endian.h: Likewise.
	* sysdeps/arm/bits/setjmp.h: Likewise.
	* sysdeps/generic/bits/byteswap.h: Likewise.
	* sysdeps/generic/bits/confname.h: Likewise.
	* sysdeps/generic/bits/dirent.h: Likewise.
	* sysdeps/generic/bits/dlfcn.h: Likewise.
	* sysdeps/generic/bits/endian.h: Likewise.
	* sysdeps/generic/bits/fenv.h: Likewise.
	* sysdeps/generic/bits/huge_val.h: Likewise.
	* sysdeps/generic/bits/in.h: Likewise.
	* sysdeps/generic/bits/ioctl-types.h: Likewise.
	* sysdeps/generic/bits/ioctls.h: Likewise.
	* sysdeps/generic/bits/ipc.h: Likewise.
	* sysdeps/generic/bits/msq.h: Likewise.
	* sysdeps/generic/bits/poll.h: Likewise.
	* sysdeps/generic/bits/resource.h: Likewise.
	* sysdeps/generic/bits/sched.h: Likewise.
	* sysdeps/generic/bits/sem.h: Likewise.
	* sysdeps/generic/bits/setjmp.h: Likewise.
	* sysdeps/generic/bits/shm.h: Likewise.
	* sysdeps/generic/bits/sigaction.h: Likewise.
	* sysdeps/generic/bits/sigcontext.h: Likewise.
	* sysdeps/generic/bits/socket.h: Likewise.
	* sysdeps/generic/bits/stat.h: Likewise.
	* sysdeps/generic/bits/statfs.h: Likewise.
	* sysdeps/generic/bits/stdio_lim.h: Likewise.
	* sysdeps/generic/bits/termios.h: Likewise.
	* sysdeps/generic/bits/time.h: Likewise.
	* sysdeps/generic/bits/uio.h: Likewise.
	* sysdeps/generic/bits/utmp.h: Likewise.
	* sysdeps/generic/bits/utmpx.h: Likewise.
	* sysdeps/generic/bits/utsname.h: Likewise.
	* sysdeps/generic/bits/waitflags.h: Likewise.
	* sysdeps/generic/bits/waitstatus.h: Likewise.
	* sysdeps/gnu/bits/utmp.h: Likewise.
	* sysdeps/gnu/bits/utmpx.h: Likewise.
	* sysdeps/i386/bits/byteswap.h: Likewise.
	* sysdeps/i386/bits/endian.h: Likewise.
	* sysdeps/i386/bits/huge_val.h: Likewise.
	* sysdeps/i386/bits/setjmp.h: Likewise.
	* sysdeps/i386/fpu/bits/fenv.h: Likewise.
	* sysdeps/ieee754/bits/huge_val.h: Likewise.
	* sysdeps/m68k/bits/byteswap.h: Likewise.
	* sysdeps/m68k/bits/endian.h: Likewise.
	* sysdeps/m68k/bits/setjmp.h: Likewise.
	* sysdeps/m68k/fpu/bits/fenv.h: Likewise.
	* sysdeps/mach/hurd/alpha/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/bits/ioctls.h: Likewise.
	* sysdeps/mach/hurd/bits/stat.h: Likewise.
	* sysdeps/mach/hurd/hppa/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/i386/bits/sigcontext.h: Likewise.
	* sysdeps/mach/hurd/mips/bits/sigcontext.h: Likewise.
	* sysdeps/mips/bits/dlfcn.h: Likewise.
	* sysdeps/mips/bits/endian.h: Likewise.
	* sysdeps/mips/bits/setjmp.h: Likewise.
	* sysdeps/mips/dec/bits/endian.h: Likewise.
	* sysdeps/mips/mips64/bits/setjmp.h: Likewise.
	* sysdeps/mips/mipsel/bits/endian.h: Likewise.
	* sysdeps/mips/p40/bits/endian.h: Likewise.
	* sysdeps/powerpc/bits/endian.h: Likewise.
	* sysdeps/powerpc/bits/fenv.h: Likewise.
	* sysdeps/powerpc/bits/setjmp.h: Likewise.
	* sysdeps/sparc/sparc32/bits/endian.h: Likewise.
	* sysdeps/sparc/sparc32/bits/setjmp.h: Likewise.
	* sysdeps/sparc/sparc32/fpu/bits/fenv.h: Likewise.
	* sysdeps/sparc/sparc64/bits/endian.h: Likewise.
	* sysdeps/sparc/sparc64/fpu/bits/fenv.h: Likewise.
	* sysdeps/unix/bsd/bits/dirent.h: Likewise.
	* sysdeps/unix/bsd/bits/stat.h: Likewise.
	* sysdeps/unix/bsd/bits/waitflags.h: Likewise.
	* sysdeps/unix/bsd/bsd4.4/bits/dirent.h: Likewise.
	* sysdeps/unix/bsd/osf/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/bsd/osf/bits/sigaction.h: Likewise.
	* sysdeps/unix/bsd/sun/m68k/bits/sigcontext.h: Likewise.
	* sysdeps/unix/bsd/sun/sparc/bits/sigcontext.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/resource.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/termios.h: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/bits/utsname.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/bits/utsname.h: Likewise.
	* sysdeps/unix/bsd/ultrix4/mips/bits/sigcontext.h: Likewise.
	* sysdeps/unix/common/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/bits/utmp.h: Likewise.
	* sysdeps/unix/sysv/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/irix4/bits/confname.h: Likewise.
	* sysdeps/unix/sysv/irix4/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/dirent.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/in.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/msq.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/resource.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sched.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sem.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/shm.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigcontext.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/uio.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/waitflags.h: Likewise.
	* sysdeps/unix/sysv/linux/i386/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/m68k/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/endian.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/ipc.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/shm.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/socket.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/statfs.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/time.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/ioctl-types.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/powerpc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/ioctls.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/poll.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/termios.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/mman.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/setjmp.h: Likewise.
	* sysdeps/unix/sysv/minix/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/bits/confname.h: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/utsname.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/waitflags.h: Likewise.
	* sysdeps/unix/sysv/sysv4/i386/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/bits/stat.h: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/sparc/bits/sigcontext.h: Likewise.
	* sysdeps/vax/bits/huge_val.h: Likewise.
	* sysdeps/vax/bits/setjmp.h: Likewise.
	* sysdeps/wordsize-32/bits/elfclass.h: Likewise.
	* sysdeps/wordsize-64/bits/elfclass.h: Likewise.

1997-11-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* libio/stdio.h: Correct comment of sys_nerr/sys_errlist

1997-11-25  Paul Eggert  <eggert@shade.twinsun.com>

	* strftime.c (strftime):
	No longer any need to undef or declare if emacs is defined.
	(my_strftime): When checking a -1 returned by mktime, don't blow up
	if localtime_r returns NULL.

1997-11-24  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* README.template: Fix spelling.

1997-11-25  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* configure.in: Enhance --enable-add-ons description a wee bit.

1997-11-24  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* glibcbug.in: Add more information of build environment and flags.

1997-11-23  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/posix/getcwd.c: Recognize EOF from readdir and translate
	it into ENOENT.

8 files changed, 172 insertions, 99 deletions

diff --git a/wcsmbs/mbrtowc.c b/wcsmbs/mbrtowc.c
index 8b4dbe2912..cf0bbd6ce2 100644
--- a/wcsmbs/mbrtowc.c
+++ b/wcsmbs/mbrtowc.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
 
@@ -38,9 +38,8 @@ __mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
   if (s == NULL)
     {
       /* See first paragraph of description in 7.16.6.3.2.  */
-      pwc = NULL;
-      s = "";
-      n = 1;
+      ps->count = 0;
+      return 0;
     }
 
   if (n > 0)
diff --git a/wcsmbs/mbsnrtowcs.c b/wcsmbs/mbsnrtowcs.c
index bb79a30ed2..db67d5c1bb 100644
--- a/wcsmbs/mbsnrtowcs.c
+++ b/wcsmbs/mbsnrtowcs.c
@@ -43,10 +43,16 @@ __mbsnrtowcs (dst, src, nmc, len, ps)
   size_t written = 0;
   const char *run = *src;
   const char *last = run + nmc;
+  wchar_t value;
+  size_t count;
 
   if (ps == NULL)
     ps = &internal;
 
+  /* Get information from last use of this state.  */
+  count = ps->count;
+  value = ps->value;
+
   if (dst == NULL)
     /* The LEN parameter has to be ignored if we don't actually write
        anything.  */
@@ -55,57 +61,66 @@ __mbsnrtowcs (dst, src, nmc, len, ps)
   /* Copy all words.  */
   while (written < len && run < last)
     {
-      wchar_t value;
-      size_t count;
-      unsigned char byte = *run++;
+      unsigned char byte;
 
-      /* We expect a start of a new multibyte character.  */
-      if (byte < 0x80)
-	{
-	  /* One byte sequence.  */
-	  count = 0;
-	  value = byte;
-	}
-      else if ((byte & 0xe0) == 0xc0)
-	{
-	  count = 1;
-	  value = byte & 0x1f;
-	}
-      else if ((byte & 0xf0) == 0xe0)
-	{
-	  /* We expect three bytes.  */
-	  count = 2;
-	  value = byte & 0x0f;
-	}
-      else if ((byte & 0xf8) == 0xf0)
-	{
-	  /* We expect four bytes.  */
-	  count = 3;
-	  value = byte & 0x07;
-	}
-      else if ((byte & 0xfc) == 0xf8)
-	{
-	  /* We expect five bytes.  */
-	  count = 4;
-	  value = byte & 0x03;
-	}
-      else if ((byte & 0xfe) == 0xfc)
-	{
-	  /* We expect six bytes.  */
-	  count = 5;
-	  value = byte & 0x01;
-	}
-      else
+      /* Store address of next byte to process.  */
+      *src = run;
+
+      /* Start reading a new character only if we are in the initial
+	 state.  */
+      if (count == 0)
 	{
-	  /* This is an illegal encoding.  */
-	  __set_errno (EILSEQ);
-	  return (size_t) -1;
+	  byte = *run++;
+
+	  /* We expect a start of a new multibyte character.  */
+	  if (byte < 0x80)
+	    {
+	      /* One byte sequence.  */
+	      count = 0;
+	      value = byte;
+	    }
+	  else if ((byte & 0xe0) == 0xc0)
+	    {
+	      count = 1;
+	      value = byte & 0x1f;
+	    }
+	  else if ((byte & 0xf0) == 0xe0)
+	    {
+	      /* We expect three bytes.  */
+	      count = 2;
+	      value = byte & 0x0f;
+	    }
+	  else if ((byte & 0xf8) == 0xf0)
+	    {
+	      /* We expect four bytes.  */
+	      count = 3;
+	      value = byte & 0x07;
+	    }
+	  else if ((byte & 0xfc) == 0xf8)
+	    {
+	      /* We expect five bytes.  */
+	      count = 4;
+	      value = byte & 0x03;
+	    }
+	  else if ((byte & 0xfe) == 0xfc)
+	    {
+	      /* We expect six bytes.  */
+	      count = 5;
+	      value = byte & 0x01;
+	    }
+	  else
+	    {
+	      /* This is an illegal encoding.  */
+	      __set_errno (EILSEQ);
+	      return (size_t) -1;
+	    }
 	}
 
       /* Read the possible remaining bytes.  */
-      while (count-- > 0)
+      while (run < last && count > 0)
 	{
 	  byte = *run++;
+	  --count;
 
 	  if ((byte & 0xc0) != 0x80)
 	    {
@@ -118,6 +133,14 @@ __mbsnrtowcs (dst, src, nmc, len, ps)
 	  value |= byte & 0x3f;
 	}
 
+      /* If this character is only partially available remember this.  */
+      if (run == last && count != 0)
+	{
+	  ps->count = count;
+	  ps->value = value;
+	  break;
+	}
+
       /* Store value is required.  */
       if (dst != NULL)
 	*dst++ = value;
@@ -128,6 +151,7 @@ __mbsnrtowcs (dst, src, nmc, len, ps)
 	{
 	  /* Found the end of the string.  */
 	  *src = NULL;
+	  ps->count = 0;
 	  return written;
 	}
 
diff --git a/wcsmbs/mbsrtowcs.c b/wcsmbs/mbsrtowcs.c
index 7ae30b4870..84d4cbf66d 100644
--- a/wcsmbs/mbsrtowcs.c
+++ b/wcsmbs/mbsrtowcs.c
@@ -52,7 +52,12 @@ __mbsrtowcs (dst, src, len, ps)
     {
       wchar_t value;
       size_t count;
-      unsigned char byte = *run++;
+      unsigned char byte;
+
+      /* Store address of next byte to process.  */
+      *src = run;
+
+      byte = *run++;
 
       /* We expect a start of a new multibyte character.  */
       if (byte < 0x80)
diff --git a/wcsmbs/wcrtomb.c b/wcsmbs/wcrtomb.c
index c5b887dce9..69c67705c3 100644
--- a/wcsmbs/wcrtomb.c
+++ b/wcsmbs/wcrtomb.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>, 1996.
 
@@ -48,8 +48,10 @@ __wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
 
   if (s == NULL)
     {
-      s = fake;
-      wc = L'\0';
+      /* This is equivalent to wcrtomb (<<internal>, L'\0', ps).  We
+	 only have to reset the state.  */
+      ps->count = 0;
+      return 1;
     }
 
   /* Store the UTF8 representation of WC.  */
@@ -65,6 +67,7 @@ __wcrtomb (char *s, wchar_t wc, mbstate_t *ps)
       /* It's a one byte sequence.  */
       if (s != NULL)
 	*s = (char) wc;
+      ps->count = 0;
       return 1;
     }
 
diff --git a/wcsmbs/wcsnrtombs.c b/wcsmbs/wcsnrtombs.c
index ddd4e95057..f6c8048295 100644
--- a/wcsmbs/wcsnrtombs.c
+++ b/wcsmbs/wcsnrtombs.c
@@ -63,7 +63,12 @@ __wcsnrtombs (dst, src, nwc, len, ps)
 
   while (written < len && nwc-- > 0)
     {
-      wchar_t wc = *run++;
+      wchar_t wc;
+
+      /* Store position of first unprocessed word.  */
+      *src = run;
+
+      wc = *run++;
 
       if (wc < 0 || wc > 0x7fffffff)
 	{
diff --git a/wcsmbs/wcsrtombs.c b/wcsmbs/wcsrtombs.c
index b2c0c73778..cc21a51eb3 100644
--- a/wcsmbs/wcsrtombs.c
+++ b/wcsmbs/wcsrtombs.c
@@ -59,7 +59,12 @@ __wcsrtombs (dst, src, len, ps)
 
   while (written < len)
     {
-      wchar_t wc = *run++;
+      wchar_t wc;
+
+      /* Store position of first unprocessed word.  */
+      *src = run;
+
+      wc = *run++;
 
       if (wc < 0 || wc > 0x7fffffff)
 	{
@@ -73,6 +78,7 @@ __wcsrtombs (dst, src, len, ps)
 	  /* Found the end.  */
 	  if (dst != NULL)
 	    *dst = '\0';
+	  ps->count = 0;
 	  *src = NULL;
 	  return written;
 	}
@@ -120,6 +126,9 @@ __wcsrtombs (dst, src, len, ps)
   /* Store position of first unprocessed word.  */
   *src = run;
 
+  /* Signal that we finished correctly.  */
+  ps->count = 0;
+
   return written;
 }
 weak_alias (__wcsrtombs, wcsrtombs)
diff --git a/wcsmbs/wmemrtombs.c b/wcsmbs/wmemrtombs.c
index 2bbd66788e..5b8e39cbe3 100644
--- a/wcsmbs/wmemrtombs.c
+++ b/wcsmbs/wmemrtombs.c
@@ -63,7 +63,12 @@ __wmemrtombs (dst, src, nwc, len, ps)
 
   while (written < len && nwc-- > 0)
     {
-      wchar_t wc = *run++;
+      wchar_t wc;
+
+      /* Store position of first unprocessed word.  */
+      *src = run;
+
+      wc = *run++;
 
       if (wc < 0 || wc > 0x7fffffff)
 	{
diff --git a/wcsmbs/wmemrtowcs.c b/wcsmbs/wmemrtowcs.c
index 1686229b8f..4efdd72d2e 100644
--- a/wcsmbs/wmemrtowcs.c
+++ b/wcsmbs/wmemrtowcs.c
@@ -43,10 +43,16 @@ __wmemrtowcs (dst, src, nmc, len, ps)
   size_t written = 0;
   const char *run = *src;
   const char *last = run + nmc;
+  wchar_t value;
+  size_t count;
 
   if (ps == NULL)
     ps = &internal;
 
+  /* Get information from last use of this state.  */
+  count = ps->count;
+  value = ps->value;
+
   if (dst == NULL)
     /* The LEN parameter has to be ignored if we don't actually write
        anything.  */
@@ -55,57 +61,66 @@ __wmemrtowcs (dst, src, nmc, len, ps)
   /* Copy all words.  */
   while (written < len && run < last)
     {
-      wchar_t value;
-      size_t count;
-      unsigned char byte = *run++;
+      unsigned char byte;
 
-      /* We expect a start of a new multibyte character.  */
-      if (byte < 0x80)
-	{
-	  /* One byte sequence.  */
-	  count = 0;
-	  value = byte;
-	}
-      else if ((byte & 0xe0) == 0xc0)
-	{
-	  count = 1;
-	  value = byte & 0x1f;
-	}
-      else if ((byte & 0xf0) == 0xe0)
-	{
-	  /* We expect three bytes.  */
-	  count = 2;
-	  value = byte & 0x0f;
-	}
-      else if ((byte & 0xf8) == 0xf0)
-	{
-	  /* We expect four bytes.  */
-	  count = 3;
-	  value = byte & 0x07;
-	}
-      else if ((byte & 0xfc) == 0xf8)
-	{
-	  /* We expect five bytes.  */
-	  count = 4;
-	  value = byte & 0x03;
-	}
-      else if ((byte & 0xfe) == 0xfc)
-	{
-	  /* We expect six bytes.  */
-	  count = 5;
-	  value = byte & 0x01;
-	}
-      else
+      /* Store address of next byte to process.  */
+      *src = run;
+
+      /* Start reading a new character only if we are in the initial
+	 state.  */
+      if (count == 0)
 	{
-	  /* This is an illegal encoding.  */
-	  __set_errno (EILSEQ);
-	  return (size_t) -1;
+	  byte = *run++;
+
+	  /* We expect a start of a new multibyte character.  */
+	  if (byte < 0x80)
+	    {
+	      /* One byte sequence.  */
+	      count = 0;
+	      value = byte;
+	    }
+	  else if ((byte & 0xe0) == 0xc0)
+	    {
+	      count = 1;
+	      value = byte & 0x1f;
+	    }
+	  else if ((byte & 0xf0) == 0xe0)
+	    {
+	      /* We expect three bytes.  */
+	      count = 2;
+	      value = byte & 0x0f;
+	    }
+	  else if ((byte & 0xf8) == 0xf0)
+	    {
+	      /* We expect four bytes.  */
+	      count = 3;
+	      value = byte & 0x07;
+	    }
+	  else if ((byte & 0xfc) == 0xf8)
+	    {
+	      /* We expect five bytes.  */
+	      count = 4;
+	      value = byte & 0x03;
+	    }
+	  else if ((byte & 0xfe) == 0xfc)
+	    {
+	      /* We expect six bytes.  */
+	      count = 5;
+	      value = byte & 0x01;
+	    }
+	  else
+	    {
+	      /* This is an illegal encoding.  */
+	      __set_errno (EILSEQ);
+	      return (size_t) -1;
+	    }
 	}
 
       /* Read the possible remaining bytes.  */
-      while (count-- > 0)
+      while (run < last && count > 0)
 	{
 	  byte = *run++;
+	  --count;
 
 	  if ((byte & 0xc0) != 0x80)
 	    {
@@ -118,6 +133,14 @@ __wmemrtowcs (dst, src, nmc, len, ps)
 	  value |= byte & 0x3f;
 	}
 
+      /* If this character is only partially available remember this.  */
+      if (run == last && count != 0)
+	{
+	  ps->count = count;
+	  ps->value = value;
+	  break;
+	}
+
       /* Store value is required.  */
       if (dst != NULL)
 	*dst++ = value;