added custom implementation for shred

include/shred/tfdef.h

@@ -0,0 +1,39 @@
+#ifndef _THREEFISH_NOISE_GENERATOR_CIPHER_DEFINITIONS_HEADER
+#define _THREEFISH_NOISE_GENERATOR_CIPHER_DEFINITIONS_HEADER
+
+#ifndef _DEFAULT_SOURCE
+#define _DEFAULT_SOURCE
+#endif
+
+#ifndef _BSD_SOURCE
+#define _BSD_SOURCE
+#endif
+
+#include <stddef.h>
+#include <stdint.h>
+#include "machdefs.h"
+
+#if defined(MACHINE_64BIT)
+#define TFNG_UNIT_TYPE uint64_t
+#define TFNG_NR_BLOCK_BITS 256
+#define TFNG_NR_KEY_BITS 512
+#else
+#define TFNG_UNIT_TYPE uint32_t
+#define TFNG_NR_BLOCK_BITS 128
+#define TFNG_NR_KEY_BITS 256
+#endif
+
+#define TFNG_NR_BLOCK_UNITS 4
+#define TFNG_NR_KEY_UNITS 8
+
+#define TFNG_BYTE_TYPE uint8_t
+#define TFNG_SIZE_UNIT (sizeof(TFNG_UNIT_TYPE))
+#define TFNG_BLOCK_SIZE (TFNG_SIZE_UNIT * TFNG_NR_BLOCK_UNITS)
+#define TFNG_KEY_SIZE (TFNG_SIZE_UNIT * TFNG_NR_KEY_UNITS)
+
+#define TFNG_TO_BITS(x) ((x) * 8)
+#define TFNG_FROM_BITS(x) ((x) / 8)
+#define TFNG_MAX_BITS TFNG_NR_BLOCK_BITS
+#define TFNG_UNIT_BITS (TFNG_SIZE_UNIT * 8)
+
+#endif