Add fuzzer for OSS-Fuzz integration

Signed-off-by: David Korczynski <david@adalogics.com>

fuzz/README.md

@@ -0,0 +1,4 @@
+# Numaqtl fuzzing
+
+OSS-Fuzz fuzzing suite. Fuzzers here are meant to run by way of OSS-Fuzz and
+will be build and executed continuously.

fuzz/fuzz_parse_str.c

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+#include <stdint.h>
+#include <stdlib.h>
+#include "numa.h"
+
+
+int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) {
+    struct bitmask *mask = NULL;
+
+    char *fuzz_str1 = malloc(size+1);
+    memcpy(fuzz_str1, data, size);
+    fuzz_str1[size] = '\0';
+
+    mask = numa_parse_nodestring(fuzz_str1);
+    if (mask != NULL) {
+        numa_bitmask_free(mask);
+    }
+
+    // NULLify the mask variable before we use it again.
+    mask = NULL;
+    mask = numa_parse_cpustring(fuzz_str1);
+    if (mask != NULL) {
+        numa_node_to_cpus_v2(0, mask);
+        numa_bitmask_free(mask);
+    }
+
+    free(fuzz_str1);
+    return 0;
+}