1 files changed, 33 insertions, 0 deletions
diff --git a/src/basic/sort-util.c b/src/basic/sort-util.c
new file mode 100644
index 0000000..e0fb9cf
--- /dev/null
+++ b/src/basic/sort-util.c
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "sort-util.h"
+#include "alloc-util.h"
+
+/* hey glibc, APIs with callbacks without a user pointer are so useless */
+void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
+                 comparison_userdata_fn_t compar, void *arg) {
+        size_t l, u, idx;
+        const void *p;
+        int comparison;
+
+        assert(!size_multiply_overflow(nmemb, size));
+
+        l = 0;
+        u = nmemb;
+        while (l < u) {
+                idx = (l + u) / 2;
+                p = (const uint8_t*) base + idx * size;
+                comparison = compar(key, p, arg);
+                if (comparison < 0)
+                        u = idx;
+                else if (comparison > 0)
+                        l = idx + 1;
+                else
+                        return (void *)p;
+        }
+        return NULL;
+}
+
+int cmp_int(const int *a, const int *b) {
+        return CMP(*a, *b);
+}