$DragonFly: src/gnu/usr.bin/cc41/cc_prep/patches/c-format.c.patch,v 1.1 2006/09/27 12:10:34 corecode Exp $
--- c-format.c	2006-09-16 20:11:29.000000000 +0200
+++ c-format.c	2006-09-26 01:05:46.000000000 +0200
@@ -506,6 +506,19 @@
   { "S",   1, STD_EXT, { TEX_W,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN  }, "-wp",       "R",  NULL },
   /* GNU conversion specifiers.  */
   { "m",   0, STD_EXT, { T89_V,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN  }, "-wp",       "",   NULL },
+  /* BSD conversion specifiers.  */
+  /* DragonFly kernel extensions (src/sys/kern/subr_prf.c).
+     The format %b is supported to decode error registers.
+     Its usage is:	printf("reg=%b\n", regval, "<base><arg>*");
+     which produces:	reg=3<BITTWO,BITONE>
+     The format %D provides a hexdump given a pointer and separator string:
+     ("%6D", ptr, ":")		-> XX:XX:XX:XX:XX:XX
+     ("%*D", len, ptr, " ")	-> XX XX XX XX ...
+   */
+  { "D",   1, STD_EXT, { T89_C,  BADLEN,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN  }, "-wp",      "cR",	NULL },
+  { "b",   1, STD_EXT, { T89_C,  BADLEN,   BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN  }, "-wp",      "",	NULL   },
+  { "ry",  0, STD_EXT, { T89_I,  BADLEN,   BADLEN,   T89_L,  BADLEN,  BADLEN,  BADLEN,  BADLEN,  BADLEN  }, "-wp0 +#",  "i",	NULL  },
+  { "z",   0, STD_EXT, { T89_UI,  T99_UC,  T89_US,  T89_UL,  T9L_ULL, TEX_ULL, T99_ST,  T99_UPD, T99_UIM }, "-wp0#",     "i",	NULL },
   { NULL,  0, 0, NOLENGTHS, NULL, NULL, NULL }
 };
 
@@ -1800,6 +1813,56 @@
 	    }
 	}
 
+      if (*format_chars == 'b')
+	{
+	  /* There should be an int arg to control the string arg.  */
+	  if (params == 0)
+	    {
+	      warning (OPT_Wformat, "too few arguments for format");
+	      return;
+	    }
+	    if (info->first_arg_num != 0)
+	    {
+	      cur_param = TREE_VALUE (params);
+	      params = TREE_CHAIN (params);
+	      ++arg_num;
+	      if ((TYPE_MAIN_VARIANT (TREE_TYPE (cur_param))
+		   != integer_type_node)
+		  &&
+		  (TYPE_MAIN_VARIANT (TREE_TYPE (cur_param))
+		   != unsigned_type_node))
+		{
+		  warning (OPT_Wformat, "bitmap is not type int (arg %d)",
+				  arg_num);
+		}
+	    }
+	}
+      if (*format_chars == 'D')
+	{
+	  /* There should be an unsigned char * arg before the string arg.  */
+	  if (params == 0)
+	    {
+	      warning (OPT_Wformat, "too few arguments for format");
+	      return;
+	    }
+	    if (info->first_arg_num != 0)
+	    {
+	      tree cur_type;
+
+	      cur_param = TREE_VALUE (params);
+	      params = TREE_CHAIN (params);
+	      ++arg_num;
+	      cur_type = TREE_TYPE (cur_param);
+	      if (TREE_CODE (cur_type) != POINTER_TYPE
+		  || TYPE_MAIN_VARIANT (TREE_TYPE (cur_type))
+		     != unsigned_char_type_node)
+		{
+		  warning (OPT_Wformat, "ethernet address is not type unsigned char * (arg %d)",
+				  arg_num);
+		}
+	    }
+        }
+
       format_char = *format_chars;
       if (format_char == 0
 	  || (!(fki->flags & (int) FMT_FLAG_FANCY_PERCENT_OK)
@@ -1930,7 +1993,7 @@
 	    y2k_level = 2;
 	  if (y2k_level == 3)
 	    warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of "
-		     "year in some locales", format_char);
+		     "year in some locales on non-BSD systems", format_char);
 	  else if (y2k_level == 2)
 	    warning (OPT_Wformat_y2k, "%<%%%c%> yields only last 2 digits of "
 		     "year", format_char);