add dev/null_detect.c

dev/null_detect.c

@@ -0,0 +1,52 @@
+
+/**
+	* RND64
+	* null_detect.c
+	*
+	* Stream reader null counter.
+	*
+	* gcc null_detect.c -o null_detect -Ofast -flto -s
+	* rnd64 -f 1m | ./null_detect
+	*
+	* @author        Martin Latter, 03/01/2019
+	* @version       0.02
+	* @license       GNU GPL version 3.0 (GPL v3); https://www.gnu.org/licenses/gpl-3.0.html
+	* @link          https://github.com/Tinram/RND64.git
+*/
+
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <inttypes.h>
+#include <time.h>
+
+
+int main(void)
+{
+	char c;
+	uint64_t iCharCount = 0;
+	uint64_t iByteCount = 0;
+
+	clock_t tStart = 0;
+	clock_t tDiff = 0;
+	int iMSec = 0;
+
+	while ((c = getchar_unlocked()) != EOF)
+	{
+		if (c == 0)
+		{
+			iCharCount++;
+		}
+
+		iByteCount++;
+	}
+
+	fprintf(stderr, "%"PRId64" null bytes found\n", iCharCount);
+	fprintf(stderr, "%"PRId64" bytes parsed\n", iByteCount);
+
+	tDiff = clock() - tStart;
+	iMSec = tDiff * 1000 / CLOCKS_PER_SEC;
+	fprintf(stderr, "time: %d s %d ms\n", iMSec / 1000, iMSec % 1000);
+
+	return EXIT_SUCCESS;
+}