--- src/apprentice.c
+++ src/apprentice.c	2013-09-30 00:00:00.000000000 +0000
@@ -48,6 +48,7 @@ FILE_RCSID("@(#)$File: apprentice.c,v 1.
 #include <sys/mman.h>
 #endif
 #include <dirent.h>
+#include <byteswap.h>
 
 #define	EATAB {while (isascii((unsigned char) *l) && \
 		      isspace((unsigned char) *l))  ++l;}
@@ -115,9 +116,11 @@ private struct mlist *mlist_alloc(void);
 private void mlist_free(struct mlist *);
 private void byteswap(struct magic *, uint32_t);
 private void bs1(struct magic *);
-private uint16_t swap2(uint16_t);
-private uint32_t swap4(uint32_t);
-private uint64_t swap8(uint64_t);
+
+#define swap2(x) bswap_16(x)
+#define swap4(x) bswap_32(x)
+#define swap8(x) bswap_64(x)
+
 private char *mkdbname(struct magic_set *, const char *, int);
 private struct magic_map *apprentice_map(struct magic_set *, const char *);
 private void apprentice_unmap(struct magic_map *);
@@ -2809,67 +2812,6 @@ byteswap(struct magic *magic, uint32_t n
 }
 
 /*
- * swap a short
- */
-private uint16_t
-swap2(uint16_t sv)
-{
-	uint16_t rv;
-	uint8_t *s = (uint8_t *)(void *)&sv; 
-	uint8_t *d = (uint8_t *)(void *)&rv; 
-	d[0] = s[1];
-	d[1] = s[0];
-	return rv;
-}
-
-/*
- * swap an int
- */
-private uint32_t
-swap4(uint32_t sv)
-{
-	uint32_t rv;
-	uint8_t *s = (uint8_t *)(void *)&sv; 
-	uint8_t *d = (uint8_t *)(void *)&rv; 
-	d[0] = s[3];
-	d[1] = s[2];
-	d[2] = s[1];
-	d[3] = s[0];
-	return rv;
-}
-
-/*
- * swap a quad
- */
-private uint64_t
-swap8(uint64_t sv)
-{
-	uint64_t rv;
-	uint8_t *s = (uint8_t *)(void *)&sv; 
-	uint8_t *d = (uint8_t *)(void *)&rv; 
-#if 0
-	d[0] = s[3];
-	d[1] = s[2];
-	d[2] = s[1];
-	d[3] = s[0];
-	d[4] = s[7];
-	d[5] = s[6];
-	d[6] = s[5];
-	d[7] = s[4];
-#else
-	d[0] = s[7];
-	d[1] = s[6];
-	d[2] = s[5];
-	d[3] = s[4];
-	d[4] = s[3];
-	d[5] = s[2];
-	d[6] = s[1];
-	d[7] = s[0];
-#endif
-	return rv;
-}
-
-/*
  * byteswap a single magic entry
  */
 private void
--- src/cdf.c
+++ src/cdf.c	2013-09-30 00:00:00.000000000 +0000
@@ -50,6 +50,7 @@ FILE_RCSID("@(#)$File: cdf.c,v 1.53 2013
 #ifdef HAVE_LIMITS_H
 #include <limits.h>
 #endif
+#include <byteswap.h>
 
 #ifndef EFTYPE
 #define EFTYPE EINVAL
@@ -75,56 +76,9 @@ static union {
 #define CDF_TOLE2(x)	((uint16_t)(NEED_SWAP ? _cdf_tole2(x) : (uint16_t)(x)))
 #define CDF_GETUINT32(x, y)	cdf_getuint32(x, y)
 
-
-/*
- * swap a short
- */
-static uint16_t
-_cdf_tole2(uint16_t sv)
-{
-	uint16_t rv;
-	uint8_t *s = (uint8_t *)(void *)&sv;
-	uint8_t *d = (uint8_t *)(void *)&rv;
-	d[0] = s[1];
-	d[1] = s[0];
-	return rv;
-}
-
-/*
- * swap an int
- */
-static uint32_t
-_cdf_tole4(uint32_t sv)
-{
-	uint32_t rv;
-	uint8_t *s = (uint8_t *)(void *)&sv;
-	uint8_t *d = (uint8_t *)(void *)&rv;
-	d[0] = s[3];
-	d[1] = s[2];
-	d[2] = s[1];
-	d[3] = s[0];
-	return rv;
-}
-
-/*
- * swap a quad
- */
-static uint64_t
-_cdf_tole8(uint64_t sv)
-{
-	uint64_t rv;
-	uint8_t *s = (uint8_t *)(void *)&sv;
-	uint8_t *d = (uint8_t *)(void *)&rv;
-	d[0] = s[7];
-	d[1] = s[6];
-	d[2] = s[5];
-	d[3] = s[4];
-	d[4] = s[3];
-	d[5] = s[2];
-	d[6] = s[1];
-	d[7] = s[0];
-	return rv;
-}
+#define _cdf_tole2(x)	bswap_16(x)
+#define _cdf_tole4(x)	bswap_32(x)
+#define _cdf_tole8(x)	bswap_64(x)
 
 /*
  * grab a uint32_t from a possibly unaligned address, and return it in