--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dev/mk-256bytes.c	Sun May 07 21:19:30 2023 +0000
@@ -0,0 +1,31 @@
+/*
+ * This program generates a binary file of 256 bytes, containing every
+ * possible octet value in linearly increasing order.  The purpose of this
+ * datum is testing of A-linear-A and mu-linear-mu PCM conversions: we need
+ * to ensure that each of those sequences is an identity transform for all
+ * possible PCM octet values.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+main(argc, argv)
+	char **argv;
+{
+	FILE *outf;
+	unsigned val;
+
+	if (argc != 2) {
+		fprintf(stderr, "usage: %s output-bin-file\n", argv[0]);
+		exit(1);
+	}
+	outf = fopen(argv[1], "w");
+	if (!outf) {
+		perror(argv[1]);
+		exit(1);
+	}
+	for (val = 0; val < 256; val++)
+		putc(val, outf);
+	fclose(outf);
+	exit(0);
+}