set default newlib dir's structure

git-svn-id: svn://kolibrios.org@4874 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/stdlib/mbtowc.c

@@ -0,0 +1,95 @@
+/*
+FUNCTION
+<<mbtowc>>---minimal multibyte to wide char converter
+
+INDEX
+	mbtowc
+
+ANSI_SYNOPSIS
+	#include <stdlib.h>
+	int mbtowc(wchar_t *<[pwc]>, const char *<[s]>, size_t <[n]>);
+
+TRAD_SYNOPSIS
+	#include <stdlib.h>
+	int mbtowc(<[pwc]>, <[s]>, <[n]>)
+	wchar_t *<[pwc]>;
+	const char *<[s]>;
+	size_t <[n]>;
+
+DESCRIPTION
+When _MB_CAPABLE is not defined, this is a minimal ANSI-conforming 
+implementation of <<mbtowc>>.  In this case,
+only ``multi-byte character sequences'' recognized are single bytes,
+and they are ``converted'' to themselves.
+Each call to <<mbtowc>> copies one character from <<*<[s]>>> to
+<<*<[pwc]>>>, unless <[s]> is a null pointer.  The argument n
+is ignored.
+
+When _MB_CAPABLE is defined, this routine calls <<_mbtowc_r>> to perform
+the conversion, passing a state variable to allow state dependent
+decoding.  The result is based on the locale setting which may
+be restricted to a defined set of locales.
+
+RETURNS
+This implementation of <<mbtowc>> returns <<0>> if
+<[s]> is <<NULL>> or is the empty string; 
+it returns <<1>> if not _MB_CAPABLE or
+the character is a single-byte character; it returns <<-1>>
+if n is <<0>> or the multi-byte character is invalid; 
+otherwise it returns the number of bytes in the multibyte character.
+If the return value is -1, no changes are made to the <<pwc>>
+output string.  If the input is the empty string, a wchar_t nul
+is placed in the output string and 0 is returned.  If the input
+has a length of 0, no changes are made to the <<pwc>> output string.
+
+PORTABILITY
+<<mbtowc>> is required in the ANSI C standard.  However, the precise
+effects vary with the locale.
+
+<<mbtowc>> requires no supporting OS subroutines.
+*/
+
+#ifndef _REENT_ONLY
+
+#include <newlib.h>
+#include <stdlib.h>
+#include <wchar.h>
+#include "local.h"
+
+int
+_DEFUN (mbtowc, (pwc, s, n),
+        wchar_t *pwc _AND
+        const char *s _AND
+        size_t n)
+{
+#ifdef _MB_CAPABLE
+  int retval = 0;
+  mbstate_t *ps;
+
+  _REENT_CHECK_MISC(_REENT);
+  ps = &(_REENT_MBTOWC_STATE(_REENT));
+  
+  retval = __mbtowc (_REENT, pwc, s, n, __locale_charset (), ps);
+  
+  if (retval < 0)
+    {
+      ps->__count = 0;
+      return -1;
+    }
+  return retval;
+#else /* not _MB_CAPABLE */
+  if (s == NULL)
+    return 0;
+  if (n == 0)
+    return -1;
+  if (pwc)
+    *pwc = (wchar_t) *s;
+  return (*s != '\0');
+#endif /* not _MB_CAPABLE */
+}
+
+#endif /* !_REENT_ONLY */
+
+
+
+