tests, native: fixup for cpuid

- adopt test name to new scheme
- make cppcheck happy / dont overwrite the target memory location twice
- fix license header
- don't redefine define if it already exists
- don't write more cpuid than is defined as size

cpu/native/include/cpu-conf.h

@@ -60,6 +60,8 @@
 /**
  * @brief   length of CPU ID for @ref cpu_id_get() in @ref periph/cpuid.h
  */
+#ifndef CPUID_ID_LEN
 #define CPUID_ID_LEN                    (4)
+#endif
 
 #endif /* CPUCONF_H_ */

cpu/native/periph_cpuid.c

@@ -1,9 +1,9 @@
 /*
  * Copyright (C) 2014 Martin Lenders <mlenders@inf.fu-berlin.de>
  *
- * This file is subject to the terms and conditions of the GNU Lesser General
- * Public License. See the file LICENSE in the top level directory for more
- * details.
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
  */
 
 /**
@@ -26,9 +26,14 @@
 
 void cpuid_get(void *id)
 {
-    memset(id, 0xff, CPUID_ID_LEN);   /* Just in case _native_id is shorter
-                                         than CPUID_ID_LEN. */
-    memcpy(id, &(_native_id), sizeof(_native_id));
+    /* Just in case _native_id is shorter than CPUID_ID_LEN: */
+    size_t len = CPUID_ID_LEN;
+    if (sizeof(_native_id) < CPUID_ID_LEN) {
+        memset(((char*)id) + sizeof(_native_id), 0xff,
+                CPUID_ID_LEN - sizeof(_native_id));
+        len = sizeof(_native_id);
+    }
+    memcpy(id, &(_native_id), len);
 }
 
 /**

tests/cpuid/Makefile

@@ -1,4 +1,4 @@
-export APPLICATION = test_cpu_id
+export APPLICATION = cpu_id
 include ../Makefile.tests_common
 
 BOARD_WHITELIST := native

tests/cpuid/main.c

@@ -1,9 +1,9 @@
 /*
  * Copyright (C) 2014 Freie Universität Berlin
  *
- * This file is subject to the terms and conditions of the GNU Lesser General
- * Public License. See the file LICENSE in the top level directory for more
- * details.
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
  */
 
 /**