From db25345de9924c87fae0f3ba5519ae1f99617037 Mon Sep 17 00:00:00 2001
From: Ariadne Conill <ariadne@dereferenced.org>
Date: Fri, 10 Dec 2021 13:26:04 -0600
Subject: use apk_endian.h wrapper instead of including endian.h directly.

endian.h is a GNU extension.  sys/endian.h and machine/endian.h are incompatible
BSD equivalents.

assume Linux systems have endian.h, provide macOS wrapper on Apple systems.

ref #10794
---
 src/adb.h         |  2 +-
 src/apk_defines.h |  3 ++-
 src/apk_endian.h  | 33 +++++++++++++++++++++++++++++++++
 src/io.c          |  2 +-
 4 files changed, 37 insertions(+), 3 deletions(-)
 create mode 100644 src/apk_endian.h

diff --git a/src/adb.h b/src/adb.h
index a306d05..de68c00 100644
--- a/src/adb.h
+++ b/src/adb.h
@@ -1,11 +1,11 @@
 #ifndef ADB_H
 #define ADB_H
 
-#include <endian.h>
 #include <stdint.h>
 #include <sys/types.h>
 #include "apk_io.h"
 #include "apk_trust.h"
+#include "apk_endian.h"
 
 struct adb;
 struct adb_obj;
diff --git a/src/apk_defines.h b/src/apk_defines.h
index 27f31ef..3626495 100644
--- a/src/apk_defines.h
+++ b/src/apk_defines.h
@@ -10,12 +10,13 @@
 #ifndef APK_DEFINES_H
 #define APK_DEFINES_H
 
-#include <endian.h>
 #include <stdint.h>
 #include <string.h>
 #include <errno.h>
 #include <time.h>
 
+#include "apk_endian.h"
+
 #define ARRAY_SIZE(x)	(sizeof(x) / sizeof((x)[0]))
 #define BIT(x)		(1 << (x))
 #define min(a, b)	((a) < (b) ? (a) : (b))
diff --git a/src/apk_endian.h b/src/apk_endian.h
new file mode 100644
index 0000000..d4ff516
--- /dev/null
+++ b/src/apk_endian.h
@@ -0,0 +1,33 @@
+/* apk_endian.h - Alpine Package Keeper (APK)
+ *
+ * Copyright (C) 2005-2008 Natanael Copa <n@tanael.org>
+ * Copyright (C) 2008-2011 Timo Teräs <timo.teras@iki.fi>
+ * All rights reserved.
+ *
+ * SPDX-License-Identifier: GPL-2.0-only
+ */
+
+#ifndef APK_ENDIAN_H
+#define APK_ENDIAN_H
+
+#ifdef __linux__
+# include <endian.h>
+#endif
+
+#ifdef __APPLE__
+# include <libkern/OSByteOrder.h>
+# define htobe16(x) OSSwapHostToBigInt16(x)
+# define htole16(x) OSSwapHostToLittleInt16(x)
+# define be16toh(x) OSSwapBigToHostInt16(x)
+# define le16toh(x) OSSwapLittleToHostInt16(x)
+# define htobe32(x) OSSwapHostToBigInt32(x)
+# define htole32(x) OSSwapHostToLittleInt32(x)
+# define be32toh(x) OSSwapBigToHostInt32(x)
+# define le32toh(x) OSSwapLittleToHostInt32(x)
+# define htobe64(x) OSSwapHostToBigInt64(x)
+# define htole64(x) OSSwapHostToLittleInt64(x)
+# define be64toh(x) OSSwapBigToHostInt64(x)
+# define le64toh(x) OSSwapLittleToHostInt64(x)
+#endif
+
+#endif
diff --git a/src/io.c b/src/io.c
index 8a9646a..1b3e7b4 100644
--- a/src/io.c
+++ b/src/io.c
@@ -10,7 +10,6 @@
 #include <errno.h>
 #include <stdio.h>
 #include <fcntl.h>
-#include <endian.h>
 #include <unistd.h>
 #include <dirent.h>
 #include <stdint.h>
@@ -24,6 +23,7 @@
 #include "apk_defines.h"
 #include "apk_io.h"
 #include "apk_crypto.h"
+#include "apk_endian.h"
 
 #if defined(__GLIBC__) || defined(__UCLIBC__)
 #define HAVE_FGETPWENT_R
-- 
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