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work on docs
[pspp]
/
src
/
libpspp
/
tower.h
diff --git
a/src/libpspp/tower.h
b/src/libpspp/tower.h
index 246984a2c1bfd6cd1c46100fbe95f84140843a92..2ec5a0d820b354a91f19cfa1dd961f5407f52dc0 100644
(file)
--- a/
src/libpspp/tower.h
+++ b/
src/libpspp/tower.h
@@
-1,5
+1,5
@@
/* PSPP - a program for statistical analysis.
/* PSPP - a program for statistical analysis.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007
, 2009, 2011
Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@
-50,13
+50,15
@@
#define LIBPSPP_TOWER_H
#include <stdbool.h>
#define LIBPSPP_TOWER_H
#include <stdbool.h>
-#include <libpspp/abt.h>
+#include "libpspp/abt.h"
+#include "libpspp/cast.h"
/* Returns the data structure corresponding to the given NODE,
assuming that NODE is embedded as the given MEMBER name in
data type STRUCT. */
/* Returns the data structure corresponding to the given NODE,
assuming that NODE is embedded as the given MEMBER name in
data type STRUCT. */
-#define tower_data(NODE, STRUCT, MEMBER) \
- ((STRUCT *) ((char *) (NODE) - offsetof (STRUCT, MEMBER)))
+#define tower_data(NODE, STRUCT, MEMBER) \
+ (CHECK_POINTER_HAS_TYPE (NODE, struct tower_node *), \
+ UP_CAST (NODE, STRUCT, MEMBER))
/* A node within a tower. */
struct tower_node
/* A node within a tower. */
struct tower_node