Add project files.

3rd-party/curl-7.52.1/lib/rand.h

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+#ifndef HEADER_CURL_RAND_H
+#define HEADER_CURL_RAND_H
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.haxx.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+
+/*
+ * Curl_rand() stores 'num' number of random unsigned integers in the buffer
+ * 'rnd' points to.
+ *
+ * If libcurl is built without TLS support or with a TLS backend that lacks a
+ * proper random API (Gskit, PolarSSL or mbedTLS), this function will use
+ * "weak" random.
+ *
+ * When built *with* TLS support and a backend that offers strong random, it
+ * will return error if it cannot provide strong random values.
+ *
+ * NOTE: 'data' may be passed in as NULL when coming from external API without
+ * easy handle!
+ *
+ */
+CURLcode Curl_rand(struct Curl_easy *data, unsigned int *rnd,
+                   unsigned int num);
+
+#endif /* HEADER_CURL_RAND_H */