Import of the watch repository from Pebble

src/fw/applib/platform.h

@@ -0,0 +1,84 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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.
+ */
+
+#pragma once
+
+typedef enum PlatformType {
+  PlatformTypeAplite,
+  PlatformTypeBasalt,
+  PlatformTypeChalk,
+  PlatformTypeDiorite,
+  PlatformTypeEmery,
+} PlatformType;
+
+// Unit tests and the firmware don't define the SDK platform defines because reasons.
+// Therefore, we need to switch on the platform for the platform type.
+#if !defined(SDK)
+  #if PLATFORM_TINTIN
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeAplite
+  #elif PLATFORM_SNOWY
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeBasalt
+  #elif PLATFORM_SPALDING
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeChalk
+  #elif PLATFORM_SILK
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeDiorite
+  #elif PLATFORM_ROBERT || PLATFORM_CALCULUS
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeEmery
+  #else
+    #error "PBL_PLATFORM_TYPE_CURRENT couldn't be determined: No PLATFORM_* defined!"
+  #endif
+#else
+  #if PBL_PLATFORM_APLITE
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeAplite
+  #elif PBL_PLATFORM_BASALT
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeBasalt
+  #elif PBL_PLATFORM_CHALK
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeChalk
+  #elif PBL_PLATFORM_DIORITE
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeDiorite
+  #elif PBL_PLATFORM_EMERY
+    #define PBL_PLATFORM_TYPE_CURRENT PlatformTypeEmery
+  #else
+    #error "PBL_PLATFORM_TYPE_CURRENT couldn't be determined: No PBL_PLATFORM_* defined!"
+  #endif
+#endif
+
+#define PBL_PLATFORM_SWITCH_DEFAULT(PLAT, DEFAULT, APLITE, BASALT, CHALK, DIORITE, EMERY) (\
+  ((PLAT) == PlatformTypeEmery) ? (EMERY) : \
+  ((PLAT) == PlatformTypeDiorite) ? (DIORITE) : \
+  ((PLAT) == PlatformTypeChalk) ? (CHALK) : \
+  ((PLAT) == PlatformTypeBasalt) ? (BASALT) : \
+  ((PLAT) == PlatformTypeBasalt) ? (APLITE) : \
+  (DEFAULT) \
+)
+
+// We fall back to Aplite because we need to fall back on _one_ of the given arguments.
+// This prevents issues with sometimes using this for pointers/strings, and sometimes for ints.
+//
+// NOTE: Optimal use of this does _not_ call a function for the `PLAT` argument! If you do, it
+//       will be _evaluated on every comparison_, which is unlikely to be what you want!
+#define PBL_PLATFORM_SWITCH(PLAT, APLITE, BASALT, CHALK, DIORITE, EMERY) \
+  PBL_PLATFORM_SWITCH_DEFAULT(PLAT, APLITE, APLITE, BASALT, CHALK, DIORITE, EMERY)
+
+
+// INTERNAL
+#define platform_type_get_name(plat) PBL_PLATFORM_SWITCH_DEFAULT(plat, \
+  /*default*/ "unknown", \
+  /*aplite*/ "aplite", \
+  /*basalt*/ "basalt", \
+  /*chalk*/ "chalk", \
+  /*diorite*/ "diorite", \
+  /*emery*/ "emery")