Add varrec, a little tool to convert files with variable records to b…

…yte streams.

tools/varrec.c

@@ -0,0 +1,34 @@
+/*
+ * A little tool to convert files with variable records to byte streams.
+ *
+ * Each record consist of 2 bytes of length (little endian) followed by
+ * that number of data bytes.
+ *
+ * If the length is odd, there is a padding byte. This byte does not have
+ * to be 0.
+ */
+#include <stdio.h>
+
+int main(int argc, char **argv)
+{
+    while (!feof(stdin)) {
+	int count, savecount;
+	unsigned char ch;
+
+	ch = getchar();
+	count = ch;
+	ch = getchar();
+	count += ch << 8;
+
+	savecount  = count;
+
+	while (count-- > 0) {
+	    ch = getchar();
+	    putchar(ch);
+	}
+
+	if (savecount & 1) {
+	    getchar();
+	}
+    }
+}