Cleanup and refactoring of the STM32w port

This is a general cleanup of things like code style issues and code structure of the STM32w port to make it more like the rest of Contiki is structured.

cpu/stm32w108/small-printf/sp-snprintf.c

@@ -0,0 +1,131 @@
+/**
+ * \addtogroup stm32w-cpu
+ *
+ * @{
+ */
+
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/* doc in sp-sprintf.c */
+/* This code created by modifying sp-sprintf.c so copyright inherited. */
+
+#include <stdio.h>
+#ifdef _HAVE_STDC
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+#include <limits.h>
+#include <errno.h>
+#include <_ansi.h>
+
+#ifndef _SMALL_PRINTF
+		#include "local.h"
+#else
+	#ifdef INTEGER_ONLY
+		#define _vfprintf_r  _vfiprintf_r 
+	#endif
+#endif
+
+
+#ifndef _SMALL_PRINTF
+	int
+	#ifdef _HAVE_STDC
+	_DEFUN (_snprintf_r, (ptr, str, size, fmt), struct _reent *ptr _AND char *str _AND size_t size _AND _CONST char *fmt _DOTS)
+	#else
+	_snprintf_r (ptr, str, size, fmt, va_alist)
+	     struct _reent *ptr;
+	     char *str;
+		 size_t size;
+	     _CONST char *fmt;
+	     va_dcl
+	#endif
+	{
+	  int ret;
+	  va_list ap;
+	  FILE f;
+	  
+	  if (size > INT_MAX)
+		{
+		 ptr->_errno = EOVERFLOW;
+		 return EOF;
+		}
+	
+	  f._flags = __SWR | __SSTR;
+	  f._bf._base = f._p = (unsigned char *) str;
+	  f._bf._size = f._w = (size > 0 ? size - 1 : 0);
+	  f._file = -1;  /* No file. */
+	#ifdef _HAVE_STDC
+	  va_start (ap, fmt);
+	#else
+	  va_start (ap);
+	#endif
+	  ret = _vfprintf_r (ptr, &f, fmt, ap);
+	  va_end (ap);
+	  if (ret < EOF)
+		ptr->_errno = EOVERFLOW;
+	  if (size > 0)
+		*f._p = 0;
+	  return (ret);
+	}
+#endif
+
+#ifndef _REENT_ONLY
+int
+#ifdef _HAVE_STDC
+_DEFUN (snprintf, (str, size, fmt), char *str _AND size_t size _AND _CONST char *fmt _DOTS)
+#else
+snprintf (str, size, fmt, va_alist)
+     char *str;
+	 size_t size;
+     _CONST char *fmt;
+     va_dcl
+#endif
+{
+  int ret;
+  va_list ap;
+  FILE f;
+
+  struct _reent *ptr = _REENT;
+
+  if (size > INT_MAX)
+    {
+      ptr->_errno = EOVERFLOW;
+      return EOF;
+    }
+
+  f._flags = __SWR | __SSTR;
+  f._bf._base = f._p = (unsigned char *) str;
+  f._bf._size = f._w = (size > 0 ? size - 1 : 0);
+  f._file = -1;  /* No file. */
+#ifdef _HAVE_STDC
+  va_start (ap, fmt);
+#else
+  va_start (ap);
+#endif
+  ret = _vfprintf_r (ptr, &f, fmt, ap);
+  va_end (ap);
+  if (ret < EOF)
+    ptr->_errno = EOVERFLOW;
+  if (size > 0)
+	*f._p = 0;
+  return (ret);
+}
+#endif
+
+/** @} */