Latest update.

crypto/bsearch.c

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2019 The OpenSSL Project Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License 2.0 (the "License").  You may not use
+ * this file except in compliance with the License.  You can obtain a copy
+ * in the file LICENSE in the source distribution or at
+ * https://www.openssl.org/source/license.html
+ */
+
+#include <stddef.h>
+#include "internal/cryptlib.h"
+
+const void *ossl_bsearch(const void *key, const void *base, int num,
+                         int size, int (*cmp) (const void *, const void *),
+                         int flags)
+{
+    const char *base_ = base;
+    int l, h, i = 0, c = 0;
+    const char *p = NULL;
+
+    if (num == 0)
+        return NULL;
+    l = 0;
+    h = num;
+    while (l < h) {
+        i = (l + h) / 2;
+        p = &(base_[i * size]);
+        c = (*cmp) (key, p);
+        if (c < 0)
+            h = i;
+        else if (c > 0)
+            l = i + 1;
+        else
+            break;
+    }
+    if (c != 0 && !(flags & OSSL_BSEARCH_VALUE_ON_NOMATCH))
+        p = NULL;
+    else if (c == 0 && (flags & OSSL_BSEARCH_FIRST_VALUE_ON_MATCH)) {
+        while (i > 0 && (*cmp) (key, &(base_[(i - 1) * size])) == 0)
+            i--;
+        p = &(base_[i * size]);
+    }
+    return p;
+}