From b902381221067fc99ee5b090dfcba427484f87f0 Mon Sep 17 00:00:00 2001
From: Eric Jiang <erjiang@alumni.iu.edu>
Date: Fri, 2 Dec 2022 21:50:04 -0800
Subject: [PATCH] Define alias for le16toh on macOS

Fixes #25
---
 usbscale.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/usbscale.c b/usbscale.c
index 56d6540..ef69429 100644
--- a/usbscale.c
+++ b/usbscale.c
@@ -53,6 +53,13 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #define WEIGH_REPORT_SIZE 6
 #define CONTROL_REPORT_SIZE 2
 
+// `le16toh` is not available on MacOS (as of 12.6) but we can replace it with
+// a similar function.
+#if defined(__APPLE__)
+  #include <libkern/OSByteOrder.h>
+  #define le16toh(x) OSSwapLittleToHostInt16(x)
+#endif
+
 //
 // **find_scale** takes a libusb device list and finds the first USB device
 // that matches a device listed in scales.h.