binutils sprintf optimisation

Avoid the use of sprintf with a "%s" format string, replacing with
strcpy or stpcpy.  Use sprintf return value rather than a later
strlen.  Don't use strcat where we can keep track of the end of a
string output buffer.

	* dlltool.c (look_for_prog): memcpy prefix and strcpy prog_name.
	* dllwrap.c (look_for_prog): Likewise.
	* resrc.c (look_for_default): Likewise.  Add quotes with memmove
	rather than allocating another buffer.
	* size.c (size_number): Use sprintf return value.
	* stabs.c (parse_stab_argtypes): Likewise.
	* windmc.c (write_bin): Likewes, and use stpcpy.
	* wrstabs.c: Similarly throughout.

binutils/stabs.c

@@ -3030,7 +3030,7 @@ parse_stab_argtypes (void *dhandle, struct stab_handle *info,
 
   if (!(is_destructor || is_full_physname_constructor || is_v3))
     {
-      unsigned int len;
+      unsigned int len, buf_len;
       const char *const_prefix;
       const char *volatile_prefix;
       char buf[20];
@@ -3042,19 +3042,19 @@ parse_stab_argtypes (void *dhandle, struct stab_handle *info,
       volatile_prefix = volatilep ? "V" : "";
 
       if (len == 0)
-	sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
+	buf_len = sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
       else if (tagname != NULL && strchr (tagname, '<') != NULL)
 	{
 	  /* Template methods are fully mangled.  */
-	  sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
+	  buf_len = sprintf (buf, "__%s%s", const_prefix, volatile_prefix);
 	  tagname = NULL;
 	  len = 0;
 	}
       else
-	sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
+	buf_len = sprintf (buf, "__%s%s%d", const_prefix, volatile_prefix, len);
 
       mangled_name_len = ((is_constructor ? 0 : strlen (fieldname))
-			  + strlen (buf)
+			  + buf_len
 			  + len
 			  + strlen (argtypes)
 			  + 1);