C: binary search

c/binary-search/src/binary_search.h

@@ -0,0 +1,20 @@
+#ifndef BINARY_SEARCH_H
+#define BINARY_SEARCH_H
+
+#include <stddef.h>
+
+const int *binary_search(int value, const int *arr, size_t length);
+
+/* See GNUmakefile below for explanation
+ * https://github.com/braoult/exercism/blob/master/c/templates/GNUmakefile
+ */
+#if defined UNIT_TEST || defined DEBUG
+#include <stdio.h>
+#include <stdlib.h>
+#endif
+#ifdef  TESTALL
+#undef  TEST_IGNORE
+#define TEST_IGNORE() {}
+#endif
+
+#endif