From 192a12fb6ab0b4a2033f087cec8a232d42a4c000 Mon Sep 17 00:00:00 2001
From: Patrick Rudolph <patrick.rudolph@9elements.com>
Date: Wed, 6 May 2020 10:52:55 +0200
Subject: commonlib/region: Add region_overlap

Add inline function to check if two regions overlap.

Change-Id: I6f3dfaa9f0805893bd691ba64f112944d89a8e71
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/41083
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
---
 src/commonlib/include/commonlib/region.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/commonlib/include/commonlib/region.h b/src/commonlib/include/commonlib/region.h
index 86b9ee39cc..08b9191a66 100644
--- a/src/commonlib/include/commonlib/region.h
+++ b/src/commonlib/include/commonlib/region.h
@@ -7,6 +7,7 @@
 #include <sys/types.h>
 #include <stdint.h>
 #include <stddef.h>
+#include <stdbool.h>
 #include <commonlib/mem_pool.h>
 
 /*
@@ -117,6 +118,12 @@ static inline size_t region_end(const struct region *r)
 	return region_offset(r) + region_sz(r);
 }
 
+static inline bool region_overlap(const struct region *r1, const struct region *r2)
+{
+	return (region_end(r1) > region_offset(r2)) &&
+	       (region_offset(r1) < region_end(r2));
+}
+
 static inline const struct region *region_device_region(
 					const struct region_device *rdev)
 {
-- 
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