Skeleton of mgos_imu_{mag,acc,gyro}.c; restructure header files

src/mgos_imu_mag.c

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mgos.h"
+#include "mgos_imu_internal.h"
+
+struct mgos_imu_mag *mgos_imu_mag_create(void) {
+  struct mgos_imu_mag *mag;
+  mag = calloc(1, sizeof(struct mgos_imu_mag));
+  if (!mag) return NULL;
+  memset(mag, 0, sizeof(struct mgos_imu_mag));
+
+  mag->type=MAG_NONE;
+  return mag;
+}
+
+bool mgos_imu_mag_destroy(struct mgos_imu_mag **mag) {
+  if (!*mag) return false;
+  free(*mag);
+  *mag=NULL;
+  return true;
+}