Squashed 'features/frameworks/nanostack-libservice/' changes from 1d4c358..dd98c37

dd98c37 Merge pull request #85 from ARMmbed/sync_with_MbedOS
8418f4c (via Mbed OS) Add missing mbed_lib.json for frameworks and nanostack
eb0692e Merge pull request #84 from ARMmbed/nslist_iar7
7ce58bf Support C++03 compilers that cannot return properly-typed pointers.
2775dce Merge pull request #83 from ARMmbed/IOTTHD-3187
fef3c6d Remove references to yotta
a953636 Avoid memcmp(x, NULL, 0)
1de4b47 (split) Fix C++11 build with Arm Compiler 6 (#79)

git-subtree-dir: features/frameworks/nanostack-libservice
git-subtree-split: dd98c37c363acd0b6547ca59adc735ee52b2a7b1

Author: Arto Kinnunen

mbed-client-libservice/ns_list.h

@@ -96,6 +96,9 @@ typedef struct ns_list {
  * always assign returned entry pointers to a properly typed pointer variable.
  * This assignment will be then type-checked where the compiler supports it, and
  * will dereference correctly on compilers that don't support this extension.
+ *
+ * If you need to support C++03 compilers that cannot return properly-typed
+ * pointers, such as IAR 7, you need to use NS_LIST_TYPECOERCE to force the type.
  * ~~~
  *     NS_LIST_HEAD(example_entry_t, link) my_list;
  *
@@ -199,6 +202,27 @@ union \
 #define NS_LIST_TYPECAST_(list, val) (0 ? (list)->type : (val))
 #endif
 
+/** \brief Macro to force correct type if necessary.
+ *
+ * In C, doesn't matter if NS_LIST_TYPECAST_ works or not, as it's legal
+ * to assign void * to a pointer. In C++, we can't do that, so need
+ * a back-up plan for C++03. This forces the type, so breaks type-safety -
+ * only activate when needed, meaning we still get typechecks on other
+ * toolchains.
+ *
+ * If a straight assignment of a ns_list function to a pointer fails
+ * on a C++03 compiler, use the following construct. This will not be
+ * required with C++11 compilers.
+ * ~~~
+ *     type *elem = NS_LIST_TYPECOERCE(type *, ns_list_get_first(list));
+ * ~~~
+ */
+#if defined(NS_LIST_PTR_TYPE_) || !defined(__cplusplus)
+#define NS_LIST_TYPECOERCE(type, val) (val)
+#else
+#define NS_LIST_TYPECOERCE(type, val) (type) (val)
+#endif
+
 /** \brief Internal macro to check types of input entry pointer. */
 #define NS_LIST_TYPECHECK_(list, entry) \
     (NS_PTR_MATCH_((list)->type, (entry), "incorrect entry type for list"), (entry))
@@ -480,7 +504,8 @@ typedef struct ns_list_link {
  * \param list `(const list_t *)` Pointer to list - evaluated multiple times.
  */
 #define ns_list_foreach(type, e, list) \
-    for (type *e = ns_list_get_first(list); e; e = ns_list_get_next(list, e))
+    for (type *e = NS_LIST_TYPECOERCE(type *, ns_list_get_first(list)); \
+        e; e = NS_LIST_TYPECOERCE(type *, ns_list_get_next(list, e)))
 
 /** \brief Iterate forwards over a list, where user may delete.
  *
@@ -500,25 +525,26 @@ typedef struct ns_list_link {
  * \param list `(list_t *)`  Pointer to list - evaluated multiple times.
  */
 #define ns_list_foreach_safe(type, e, list) \
-    for (type *e = ns_list_get_first(list), *_next##e; \
-        e && (_next##e = ns_list_get_next(list, e), true); e = _next##e)
+    for (type *e = NS_LIST_TYPECOERCE(type *, ns_list_get_first(list)), *_next##e; \
+        e && (_next##e = NS_LIST_TYPECOERCE(type *, ns_list_get_next(list, e)), true); e = _next##e)
 
 /** \brief Iterate backwards over a list.
  *
  * As ns_list_foreach(), but going backwards - see its documentation.
  * Iterating forwards is *slightly* more efficient.
  */
 #define ns_list_foreach_reverse(type, e, list) \
-    for (type *e = ns_list_get_last(list); e; e = ns_list_get_previous(list, e))
+    for (type *e = NS_LIST_TYPECOERCE(type *, ns_list_get_last(list)); \
+        e; e = NS_LIST_TYPECOERCE(type *, ns_list_get_previous(list, e)))
 
 /** \brief Iterate backwards over a list, where user may delete.
  *
  * As ns_list_foreach_safe(), but going backwards - see its documentation.
  * Iterating forwards is *slightly* more efficient.
  */
 #define ns_list_foreach_reverse_safe(type, e, list) \
-    for (type *e = ns_list_get_last(list), *_next##e; \
-        e && (_next##e = ns_list_get_previous(list, e), true); e = _next##e)
+    for (type *e = NS_LIST_TYPECOERCE(type *, ns_list_get_last(list)), *_next##e; \
+        e && (_next##e = NS_LIST_TYPECOERCE(type *, ns_list_get_previous(list, e)), true); e = _next##e)
 
 /** \hideinitializer \brief Count entries on a list
  *

mbed-client-libservice/ns_types.h

@@ -121,7 +121,15 @@ typedef int_fast32_t int_fast24_t;
 #define alignas(n) __align(n)
 #define __alignas_is_defined 1
 #elif (defined __STDC_VERSION__ && __STDC_VERSION__ >= 201112L) || (defined __cplusplus && __cplusplus >= 201103L)
-#include <stdalign.h>
+# if defined __ARMCC_VERSION && __ARMCC_VERSION < 6120000
+/* Workaround for Arm Compiler versions prior to 6.12 */
+#   if !defined __cplusplus
+#     define alignas _Alignas
+#   endif
+#   define __alignas_is_defined 1
+# else
+#   include <stdalign.h>
+# endif
 #elif defined __GNUC__
 #define alignas(n) __attribute__((__aligned__(n)))
 #define __alignas_is_defined 1

mbed_lib.json

@@ -0,0 +1,3 @@
+{
+    "name": "nanostack-libservice"
+}

module.json

@@ -35,7 +35,7 @@ bool bitsequal(const uint8_t *a, const uint8_t *b, uint_fast8_t bits)
     uint_fast8_t bytes = bits / 8;
     bits %= 8;
 
-    if (memcmp(a, b, bytes)) {
+    if (bytes && memcmp(a, b, bytes)) {
         return false;
     }
 

source/libBits/common_functions.c

@@ -18,13 +18,13 @@
 #include <stdarg.h>
 #include <stdlib.h>
 
-#ifndef YOTTA_CFG_MBED_TRACE
-#define YOTTA_CFG_MBED_TRACE 1
-#define YOTTA_CFG_MBED_TRACE_FEA_IPV6 1
+#ifndef MBED_CONF_MBED_TRACE_ENABLE
+#define MBED_CONF_MBED_TRACE_ENABLE 1
+#define MBED_CONF_MBED_TRACE_FEA_IPV6 1
 #endif
 
 #include "mbed-trace/mbed_trace.h"
-#if YOTTA_CFG_MBED_TRACE_FEA_IPV6 == 1
+#if MBED_CONF_MBED_TRACE_FEA_IPV6 == 1
 #include "mbed-client-libservice/ip6string.h"
 #include "mbed-client-libservice/common_functions.h"
 #endif
@@ -101,7 +101,7 @@ const char *mbed_trace_last(void)
 }
 
 /* Helping functions */
-#if YOTTA_CFG_MBED_TRACE_FEA_IPV6 == 1
+#if MBED_CONF_MBED_TRACE_FEA_IPV6 == 1
 char *mbed_trace_ipv6(const void *addr_ptr)
 {
     return NULL;
@@ -111,7 +111,7 @@ char *mbed_trace_ipv6_prefix(const uint8_t *prefix, uint8_t prefix_len)
 {
     return NULL;
 }
-#endif //YOTTA_CFG_MBED_TRACE_FEA_IPV6
+#endif //MBED_CONF_MBED_TRACE_FEA_IPV6
 
 char *mbed_trace_array(const uint8_t *buf, uint16_t len)
 {