chore: import upstream snapshot with attribution

components/bootloader_support/include/bootloader_util.h

@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: 2018-2021 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <assert.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Check if half-open intervals overlap
+ *
+ * @param start1  interval 1 start
+ * @param end1    interval 1 end
+ * @param start2  interval 2 start
+ * @param end2    interval 2 end
+ * @return true iff [start1; end1) overlaps [start2; end2)
+ */
+static inline bool bootloader_util_regions_overlap(
+    const intptr_t start1, const intptr_t end1,
+    const intptr_t start2, const intptr_t end2)
+{
+    assert(end1 > start1);
+    assert(end2 > start2);
+    return (end1 > start2 && end2 > start1);
+}
+
+#ifdef __cplusplus
+}
+#endif