Enlightenment CVS committal
Author : mej
Project : eterm
Module : libast
Dir : eterm/libast/include/libast
Modified Files:
types.h.in
Log Message:
Tue Jun 29 14:32:01 2004 Michael Jennings (mej)
I'll document all this stuff shortly.
----------------------------------------------------------------------
===================================================================
RCS file: /cvsroot/enlightenment/eterm/libast/include/libast/types.h.in,v
retrieving revision 1.17
retrieving revision 1.18
diff -u -3 -r1.17 -r1.18
--- types.h.in 3 Feb 2004 23:16:59 -0000 1.17
+++ types.h.in 29 Jun 2004 18:32:20 -0000 1.18
@@ -841,6 +841,29 @@
*/
#define SPIF_CMP_IS_GREATER(cmp) ((cmp) == SPIF_CMP_GREATER)
+/**
+ * Convenience macro for comparing possibly NULL values.
+ *
+ * This macro exists because I got tired of typing the same thing over
+ * and over again to handle comparisons of two pointers, either of
+ * which may be NULL.
+ *
+ * @param p1 The first pointer.
+ * @param p2 The second pointer.
+ * @return
+ *
+ * @see @link DOXGRP_STRINGS String Utility Routines @endlink, SPIF_PTR_ISNULL()
+ */
+#define SPIF_COMP_CHECK_NULL(p1, p2) do { \
+ if (SPIF_PTR_ISNULL((p1)) &&
SPIF_PTR_ISNULL((p2))) { \
+ return SPIF_CMP_EQUAL; \
+ } else if (SPIF_PTR_ISNULL((p1))) { \
+ return SPIF_CMP_LESS; \
+ } else if (SPIF_PTR_ISNULL((p2))) { \
+ return SPIF_CMP_GREATER; \
+ } \
+ } while (0)
+
#undef false
#undef False
#undef FALSE
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