1 files changed, 82 insertions, 0 deletions
diff --git a/testing/fulltests/unit-tests/T015int64_clib.c b/testing/fulltests/unit-tests/T015int64_clib.c
new file mode 100644
index 0000000..5f5f4b6
--- /dev/null
+++ b/testing/fulltests/unit-tests/T015int64_clib.c
@@ -0,0 +1,82 @@
+/* HEADER Testing 64-bit integer operations (U64). */
+
+int i, j;
+char buf[22];
+static const int64_t intval[] = {
+    0,
+    -1,
+    1,
+    37,
+    0x7fffffffUL,
+    0x80000000UL,
+    0x99999999UL,
+    0x7fffffffffffffffULL,
+    0x8000000000000000ULL,
+};
+
+for (i = 0; i < sizeof(intval)/sizeof(intval[0]); ++i) {
+    U64 a, b;
+    a.low = (uint32_t)intval[i];
+    a.high = (uint32_t)(intval[i] >> 32);
+    printI64(buf, &a);
+    read64(&b, buf);
+    OKF(memcmp(&a, &b, sizeof(a)) == 0,
+        ("[%d]: %" PRId64 " <> %s <> %" PRId64, i, intval[i], buf,
+         ((uint64_t)b.high) << 32 | b.low));
+}
+
+for (i = 0; i < sizeof(intval)/sizeof(intval[0]); ++i) {
+    for (j = i; j < sizeof(intval)/sizeof(intval[0]); ++j) {
+        U64 a, b;
+        uint64_t d;
+        a.low = (uint32_t)intval[i];
+        a.high = (uint32_t)(intval[i] >> 32);
+        b.low = (uint32_t)intval[j];
+        b.high = (uint32_t)(intval[j] >> 32);
+        u64Incr(&a, &b);
+        d = (uint64_t)a.high << 32 | a.low;
+        OKF(intval[i] + intval[j] == d,
+            ("%" PRId64 " + %" PRId64 " = %" PRId64 " <> %" PRId64, intval[i],
+             intval[j], intval[i] + intval[j], d));
+    }
+}
+        
+for (i = 0; i < sizeof(intval)/sizeof(intval[0]); ++i) {
+    for (j = i; j < sizeof(intval)/sizeof(intval[0]); ++j) {
+        U64 a, b, c;
+        uint64_t d;
+        a.low = (uint32_t)intval[i];
+        a.high = (uint32_t)(intval[i] >> 32);
+        b.low = (uint32_t)intval[j];
+        b.high = (uint32_t)(intval[j] >> 32);
+        u64Subtract(&a, &b, &c);
+        d = (uint64_t)c.high << 32 | c.low;
+        OKF(intval[i] - intval[j] == d,
+            ("%" PRId64 " - %" PRId64 " = %" PRId64 " <> %" PRId64, intval[i],
+             intval[j], intval[i] - intval[j], d));
+    }
+}
+        
+{
+    U64 old_val, new_val;
+    old_val.low = 7;
+    old_val.high = 0;
+    new_val = old_val;
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 0) == 0, "cwrap1");
+    new_val.low = 8;
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 0) == 0, "cwrap2");
+    new_val.low = 6;
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 0) == 32, "cwrap3");
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 1) == 32
+       && new_val.low == 6 && new_val.high == 1, "cwrap4");
+    old_val.low = 7;
+    old_val.high = 0xffffffffU;
+    new_val.low = 7;
+    new_val.high = old_val.high;
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 0) == 0, "cwrap5");
+    new_val.low = 8;
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 0) == 0, "cwrap6");
+    new_val.low = 6;
+    new_val.high = 0;
+    OK(netsnmp_c64_check_for_32bit_wrap(&old_val, &new_val, 0) == 64, "cwrap7");
+}