1 files changed, 20 insertions, 0 deletions
diff --git a/libcmap_find_block.c b/libcmap_find_block.c
new file mode 100644
index 0000000..974297d
--- /dev/null
+++ b/libcmap_find_block.c
@@ -0,0 +1,20 @@
+/* See LICENSE file for copyright and license details. */
+#include "libcmap.h"
+
+
+const struct libcmap_block *
+libcmap_find_block(uint32_t codepoint, size_t *offset_out)
+{
+	const struct libcmap_block *list = libcmap_block_list;
+	size_t i, n = libcmap_block_list_size;
+	for (i = 0; i < n; i++) {
+		if (list[i].range.first <= codepoint && list[i].range.last <= codepoint) {
+			if (offset_out)
+				*offset_out = (size_t)(codepoint - list[i].range.first);
+			return &list[i];
+		}
+	}
+	if (offset_out)
+		*offset_out = (size_t)codepoint;
+	return NULL;
+}