From af3a2788aad87d9b018ea5c4125404242927e47d Mon Sep 17 00:00:00 2001
From: Juan RP <xtraeme@gmail.com>
Date: Tue, 4 May 2010 14:36:32 +0200
Subject: [PATCH] Provide stubs for htobe{32,64}() and be32toh() macros if they
 aren't defined on Linux.

Tested and verified by Jimmy on xbps@googlegroups.com.
---
 lib/sha256.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/lib/sha256.c b/lib/sha256.c
index dfa4f52a..985f3397 100644
--- a/lib/sha256.c
+++ b/lib/sha256.c
@@ -36,6 +36,7 @@
  *
  */
 
+#include <sys/param.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <errno.h>
@@ -51,6 +52,34 @@
 #include <xbps_api.h>
 #include "sha256.h"
 
+/* Workaround byte swap cludge on Linux systems */
+#ifdef _BSD
+#include <sys/endian.h>
+#elif defined(__linux__)
+#include <byteswap.h>
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+#  ifndef htobe32
+#    define htobe32(x) bswap_32 (x)
+#  endif
+#  ifndef be32toh
+#    define be32toh(x) bswap_32 (x)
+#  endif
+#  ifndef htobe64
+#    define htobe64(x) bswap_64 (x)
+#  endif
+# else
+#  ifndef htobe32
+#    define htobe32(x) (x)
+#  endif
+#  ifndef be32toh
+#    define be32toh(x) (x)
+#  endif
+#  ifndef htobe64
+#    define htobe64(x) (x)
+#  endif
+# endif
+#endif
+
 /*** SHA-256 Various Length Definitions ***********************/
 /* NOTE: Most of these are in sha2.h */
 #define SHA256_SHORT_BLOCK_LENGTH	(SHA256_BLOCK_LENGTH - 8)