2002-09-09 Jeff Johnston <jjohnstn@redhat.com>

        * libc/include/sys/_types.h (_mbstate_t): Changed to use
        unsigned char internally.
        * libc/sys/linux/sys/_types.h: Ditto.
        * libc/include/sys/reent.h
        * libc/stdlib/mblen.c (mblen): Use function-specific state
        value from default reentrancy structure.
        * libc/stdlib/mblen_r.c (_mblen_r):  If return code from
        _mbtowc_r is less than 0, reset state __count value and
        return -1.
        * libc/stdlib/mbrlen.c (mbrlen): If the input state pointer
        is NULL, use the function-specific pointer provided in the
        default reentrancy structure.
        * libc/stdlib/mbrtowc.c: Add reentrant form of function.
        If input state pointer is NULL, use function-specific area
        provided in reentrancy structure.
        * libc/stdlib/mbsrtowcs.c: Ditto.
        * libc/stdlib/wcrtomb.c: Ditto.
        * libc/stdlib/wcsrtombs.c: Ditto.
        * libc/stdlib/mbstowcs.c: Reformat.
        * libc/stdlib/wcstombs.c: Ditto.
        * libc/stdlib/mbstowcs_r.c (_mbstowcs_r): If an error occurs,
        reset the state's __count value and return -1.
        * libc/stdlib/mbtowc.c: Ditto.
        * libc/stdlib/mbtowc_r.c (_mbtowc_r): Add restartable functionality.
        If number of bytes is used up before completing a valid multibyte
        character, return -2 and save the state.
        * libc/stdlib/wctomb_r.c (_wctomb_r): Define __state as __count
        and change some __count references to __state for clarity.

1 files changed, 30 insertions, 8 deletions

diff --git a/newlib/libc/stdlib/mbrtowc.c b/newlib/libc/stdlib/mbrtowc.c
index 7934ca1..0db1208 100644
--- a/newlib/libc/stdlib/mbrtowc.c
+++ b/newlib/libc/stdlib/mbrtowc.c
@@ -6,24 +6,46 @@
 #include <string.h>
 
 size_t
-mbrtowc(wchar_t *pwc, const char *s, size_t n, mbstate_t *ps)
+_DEFUN (_mbrtowc_r, (ptr, pwc, s, n, ps),
+	struct _reent *ptr _AND
+	wchar_t *pwc _AND
+	const char *s _AND
+	size_t n _AND
+	mbstate_t *ps)
 {
   int retval = 0;
-  _REENT_CHECK_MISC(_REENT);
+
+#ifdef MB_CAPABLE
+  if (ps == NULL)
+    {
+      _REENT_CHECK_MISC(ptr);
+      ps = &(_REENT_MBRTOWC_STATE(ptr));
+    }
+#endif
 
   if (s == NULL)
-    retval = _mbtowc_r (_REENT, pwc, "", 1, ps);
+    retval = _mbtowc_r (ptr, pwc, "", 1, ps);
   else
-    retval = _mbtowc_r (_REENT, pwc, s, n, ps);
-
-  if (*pwc == NULL)
-    memset (ps, '\0', sizeof (mbstate_t));
+    retval = _mbtowc_r (ptr, pwc, s, n, ps);
 
   if (retval == -1)
     {
-      _REENT->_errno = EILSEQ;
+      ps->__count = 0;
+      ptr->_errno = EILSEQ;
       return (size_t)(-1);
     }
   else
     return (size_t)retval;
 }
+
+#ifndef _REENT_ONLY
+size_t
+_DEFUN (mbrtowc, (pwc, s, n, ps),
+	wchar_t *pwc _AND
+	const char *s _AND
+	size_t n _AND
+	mbstate_t *ps)
+{
+  return _mbrtowc_r (_REENT, pwc, s, n, ps);
+}
+#endif /* !_REENT_ONLY */