From a1a6a5cf18241da4cc5869d6b69ecbc89ffcec93 Mon Sep 17 00:00:00 2001
From: Thomas Perl <m@thp.io>
Date: Fri, 27 Jul 2018 15:18:55 +0200
Subject: [PATCH 1/2] Fix version check

---
 src/psmove.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/src/psmove.c b/src/psmove.c
index 3285947d..8c7c990f 100644
--- a/src/psmove.c
+++ b/src/psmove.c
@@ -276,14 +276,13 @@ psmove_get_half_frame(PSMove *move, enum PSMove_Sensor sensor,
 enum PSMove_Bool
 psmove_init(enum PSMove_Version version)
 {
-    /**
-     * You could do initialization here. Be sure to always check
-     * if initialization has already been carried out, as this
-     * might be called multiple times, even after succeeding once.
-     **/
+    // Compile-time version of the library is PSMOVE_CURRENT_VERSION
+    // Compile-time version of the user code is the value of "version"
 
-    /* For now, assume future versions will be backwards-compatible */
-    if (version >= PSMOVE_CURRENT_VERSION) {
+    // The requested version must be equal or less than the version implemented,
+    // but it's okay if the requested version is less than the implemented version,
+    // as we (try to) be backwards compatible with older API users
+    if (version <= PSMOVE_CURRENT_VERSION) {
         return PSMove_True;
     } else {
         return PSMove_False;

From 2bf06a637e90b73d56ddc1b9e29728639a1d1e00 Mon Sep 17 00:00:00 2001
From: Thomas Perl <m@thp.io>
Date: Fri, 27 Jul 2018 15:19:16 +0200
Subject: [PATCH 2/2] Take PSMOVE_CURRENT_VERSION from CMake (Fixes #360)

---
 include/psmove.h           | 11 +++--------
 include/psmove_config.h.in |  5 +++++
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/include/psmove.h b/include/psmove.h
index 03071181..2fffabce 100644
--- a/include/psmove.h
+++ b/include/psmove.h
@@ -231,14 +231,9 @@ typedef struct _PSMove_3AxisTransform PSMove_3AxisTransform;
 
 /*! Library version number */
 enum PSMove_Version {
-    /**
-     * Version format: AA.BB.CC = 0xAABBCC
-     *
-     * Examples:
-     *  3.0.1 = 0x030001
-     *  4.2.11 = 0x04020B
-     **/
-    PSMOVE_CURRENT_VERSION = 0x030001, /*!< Current version, see psmove_init() */
+    PSMOVE_CURRENT_VERSION = (PSMOVEAPI_VERSION_MAJOR << 16) |
+                             (PSMOVEAPI_VERSION_MINOR << 8) |
+                             (PSMOVEAPI_VERSION_PATCH << 0)
 };
     
 /**
diff --git a/include/psmove_config.h.in b/include/psmove_config.h.in
index bfc16bcb..84e78586 100644
--- a/include/psmove_config.h.in
+++ b/include/psmove_config.h.in
@@ -33,3 +33,8 @@
 
 #cmakedefine PSMOVE_BUILD_TRACKER
 #cmakedefine PSMOVE_USE_PSEYE
+
+/* Version information */
+#define PSMOVEAPI_VERSION_MAJOR @PSMOVEAPI_VERSION_MAJOR@
+#define PSMOVEAPI_VERSION_MINOR @PSMOVEAPI_VERSION_MINOR@
+#define PSMOVEAPI_VERSION_PATCH @PSMOVEAPI_VERSION_PATCH@