X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fe2apv1sim%2Fricsim%2FASN1c%2Fasn_random_fill.c;fp=e2sim%2Fe2apv1sim%2Fricsim%2FASN1c%2Fasn_random_fill.c;h=819cf700ecc63254d2063af92e5a071d860899f8;hp=0000000000000000000000000000000000000000;hb=3ebf932d23dcbec9ed19f4a51f9d00a0a54f5124;hpb=6896318f2b4ff01b4a88b16019c3dc93b0b693f5

diff --git a/e2sim/e2apv1sim/ricsim/ASN1c/asn_random_fill.c b/e2sim/e2apv1sim/ricsim/ASN1c/asn_random_fill.c
new file mode 100644
index 0000000..819cf70
--- /dev/null
+++ b/e2sim/e2apv1sim/ricsim/ASN1c/asn_random_fill.c
@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
+ * All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#include <asn_internal.h>
+#include <asn_random_fill.h>
+#include <constr_TYPE.h>
+
+int
+asn_random_fill(const struct asn_TYPE_descriptor_s *td, void **struct_ptr,
+                size_t length) {
+
+    if(td && td->op->random_fill) {
+        asn_random_fill_result_t res =
+            td->op->random_fill(td, struct_ptr, 0, length);
+        return (res.code == ARFILL_OK) ? 0 : -1;
+    } else {
+        return -1;
+    }
+}
+
+static uintmax_t
+asn__intmax_range(intmax_t lb, intmax_t ub) {
+    assert(lb <= ub);
+    if((ub < 0) == (lb < 0)) {
+        return ub - lb;
+    } else if(lb < 0) {
+        return 1 + ((uintmax_t)ub + (uintmax_t)-(lb + 1));
+    } else {
+        assert(!"Unreachable");
+        return 0;
+    }
+}
+
+intmax_t
+asn_random_between(intmax_t lb, intmax_t rb) {
+    if(lb == rb) {
+        return lb;
+    } else {
+        const uintmax_t intmax_max = ((~(uintmax_t)0) >> 1);
+        uintmax_t range = asn__intmax_range(lb, rb);
+        uintmax_t value = 0;
+        uintmax_t got_entropy = 0;
+
+        assert(RAND_MAX > 0xffffff);    /* Seen 7ffffffd! */
+        assert(range < intmax_max);
+
+        for(; got_entropy < range;) {
+            got_entropy = (got_entropy << 24) | 0xffffff;
+            value = (value << 24) | (random() % 0xffffff);
+        }
+
+        return lb + (intmax_t)(value % (range + 1));
+    }
+}