Add simple pointer array

1 files changed, 20 insertions, 0 deletions

diff --git a/libnul.h b/libnul.h
index 009268c..9ef66e5 100644
--- a/libnul.h
+++ b/libnul.h
@@ -22,6 +22,26 @@
 #include <stdint.h>
 #include <glib.h>
 
+/* From glib */
+
+/* Provide convenience macros for handling structure
+ * fields through their offsets.
+ */
+
+#if defined(__GNUC__)  && __GNUC__ >= 4
+#  define NUL_STRUCT_OFFSET(struct_type, member) \
+      ((gssize) __builtin_offsetof (struct_type, member))
+#else
+#  define NUL_STRUCT_OFFSET(struct_type, member)	\
+      ((gssize) ((guint8*) &((struct_type*) 0)->member))
+#endif
+
+/* Pointer arrays */
+void **nul_parr_new    (void);
+void **nul_parr_append (void **arr, gpointer data);
+gsize  nul_parr_len    (void **arr);
+void   nul_parr_free   (void **arr);
+
 typedef union
 {
     uint32_t		v_uint32;