Diff: srand_from_pubnub_time.cpp

Revision:

2:4d49720c7200

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/srand_from_pubnub_time.cpp	Fri Nov 11 22:46:57 2016 +0000
@@ -0,0 +1,37 @@
+#include "srand_from_pubnub_time.h"
+
+#include "pubnub_coreapi.h"
+#include "pubnub_ntf_sync.h"
+
+#include <stdlib.h>
+#include <string.h>
+
+
+int srand_from_pubnub_time(pubnub_t *pbp)
+{
+    pubnub_res rslt = pubnub_time(pbp);
+    if (rslt != PNR_STARTED) {
+        return -1;
+    }
+    rslt = pubnub_await(pbp);
+    if (rslt != PNR_OK) {
+        return -1;
+    }
+    char const* pbtime = pubnub_get(pbp);
+    if (0 == pbtime)  {
+        return -1;
+    }
+    size_t length_of_time = strlen(pbtime);
+    if (0 == length_of_time) {
+        return -1;
+    }
+    char const *s = pbtime + length_of_time - 1;
+    unsigned int val_for_srand = 0;
+    for (int i = 0; (i < 10) && (s > pbtime); ++i, --s) {
+        val_for_srand = val_for_srand * 10 + *s - '0';
+    }
+    
+    srand(val_for_srand);
+    
+    return 0;
+}
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