Implemented stdlib.h

libc/stdlib/search.c

@@ -0,0 +1,25 @@
+#include <stdlib.h>
+#include <stddef.h>
+
+void* bsearch(const void* key, const void* base, size_t nitem, size_t size, int (*compar)(const void*, const void*)) {
+    size_t left = 0;
+    size_t right = nitem;
+
+    while (left < right) {
+        size_t mid = left + (right - left) / 2;
+        void* midEl = (char*)base + mid * size;
+
+        int cmp = compar(key, midEl);
+
+        if (cmp < 0) {
+            right = mid;
+        } else if (cmp > 0) {
+            left = mid + 1;
+        } else {
+            return midEl;
+        }
+    }
+
+    return NULL;
+}
+