From b2016fd2a52b82d45324526c965e7545d026cebe Mon Sep 17 00:00:00 2001
From: Thomas Haller <thaller@redhat.com>
Date: Mon, 5 Sep 2016 14:12:41 +0200
Subject: shared: add NM_MIN()/NM_MAX() macros to replace glib's MIN()/MAX()

---
 shared/nm-utils/nm-macros-internal.h | 44 ++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)

diff --git a/shared/nm-utils/nm-macros-internal.h b/shared/nm-utils/nm-macros-internal.h
index c66cb53954..2067dba2a5 100644
--- a/shared/nm-utils/nm-macros-internal.h
+++ b/shared/nm-utils/nm-macros-internal.h
@@ -542,6 +542,50 @@ nm_strcmp_p_with_data (gconstpointer a, gconstpointer b, gpointer user_data)
 
 /*****************************************************************************/
 
+/* Taken from systemd's UNIQ_T and UNIQ macros. */
+
+#define NM_UNIQ_T(x, uniq) G_PASTE(__unique_prefix_, G_PASTE(x, uniq))
+#define NM_UNIQ __COUNTER__
+
+/*****************************************************************************/
+
+/* glib's MIN()/MAX() macros don't have function-like behavior, in that they evaluate
+ * the argument possibly twice.
+ *
+ * Taken from systemd's MIN()/MAX() macros. */
+
+#define NM_MIN(a, b) __NM_MIN(NM_UNIQ, a, NM_UNIQ, b)
+#define __NM_MIN(aq, a, bq, b) \
+	({ \
+		typeof (a) NM_UNIQ_T(A, aq) = (a); \
+		typeof (b) NM_UNIQ_T(B, bq) = (b); \
+		((NM_UNIQ_T(A, aq) < NM_UNIQ_T(B, bq)) ? NM_UNIQ_T(A, aq) : NM_UNIQ_T(B, bq)); \
+	})
+
+#define NM_MAX(a, b) __NM_MAX(NM_UNIQ, a, NM_UNIQ, b)
+#define __NM_MAX(aq, a, bq, b) \
+	({ \
+		typeof (a) NM_UNIQ_T(A, aq) = (a); \
+		typeof (b) NM_UNIQ_T(B, bq) = (b); \
+		((NM_UNIQ_T(A, aq) > NM_UNIQ_T(B, bq)) ? NM_UNIQ_T(A, aq) : NM_UNIQ_T(B, bq)); \
+	})
+
+#define NM_CLAMP(x, low, high) __NM_CLAMP(NM_UNIQ, x, NM_UNIQ, low, NM_UNIQ, high)
+#define __NM_CLAMP(xq, x, lowq, low, highq, high) \
+	({ \
+		typeof(x)NM_UNIQ_T(X,xq) = (x); \
+		typeof(low) NM_UNIQ_T(LOW,lowq) = (low); \
+		typeof(high) NM_UNIQ_T(HIGH,highq) = (high); \
+		\
+		( (NM_UNIQ_T(X,xq) > NM_UNIQ_T(HIGH,highq)) \
+		  ? NM_UNIQ_T(HIGH,highq) \
+		  : (NM_UNIQ_T(X,xq) < NM_UNIQ_T(LOW,lowq)) \
+		     ? NM_UNIQ_T(LOW,lowq) \
+		     : NM_UNIQ_T(X,xq)); \
+	})
+
+/*****************************************************************************/
+
 static inline guint
 nm_encode_version (guint major, guint minor, guint micro) {
 	/* analog to the preprocessor macro NM_ENCODE_VERSION(). */
-- 
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