emacs-module: Use __attribute__((nonnull))

Annotate all parameters with __attribute__((nonnull)) that may not be
NULL.

1 files changed, 67 insertions, 31 deletions

diff --git a/src/emacs-module.h b/src/emacs-module.h
index 26b519a39cf..88cc38191b1 100644
--- a/src/emacs-module.h
+++ b/src/emacs-module.h
@@ -35,6 +35,12 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 # define EMACS_NOEXCEPT
 #endif
 
+#if defined __has_attribute && __has_attribute(__nonnull__)
+# define EMACS_ATTRIBUTE_NONNULL(...) __attribute__((__nonnull__(__VA_ARGS__)))
+#else
+# define EMACS_ATTRIBUTE_NONNULL(...)
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif
@@ -58,7 +64,8 @@ struct emacs_runtime
   struct emacs_runtime_private *private_members;
 
   /* Return an environment pointer.  */
-  emacs_env *(*get_environment) (struct emacs_runtime *ert);
+  emacs_env *(*get_environment) (struct emacs_runtime *ert)
+    EMACS_ATTRIBUTE_NONNULL(1);
 };
 
 
@@ -86,29 +93,36 @@ struct emacs_env_25
   /* Memory management.  */
 
   emacs_value (*make_global_ref) (emacs_env *env,
-                                  emacs_value any_reference);
+                                  emacs_value any_reference)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   void (*free_global_ref) (emacs_env *env,
-                           emacs_value global_reference);
+                           emacs_value global_reference)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   /* Non-local exit handling.  */
 
-  enum emacs_funcall_exit (*non_local_exit_check) (emacs_env *env);
+  enum emacs_funcall_exit (*non_local_exit_check) (emacs_env *env)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  void (*non_local_exit_clear) (emacs_env *env);
+  void (*non_local_exit_clear) (emacs_env *env)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   enum emacs_funcall_exit (*non_local_exit_get)
     (emacs_env *env,
      emacs_value *non_local_exit_symbol_out,
-     emacs_value *non_local_exit_data_out);
+     emacs_value *non_local_exit_data_out)
+    EMACS_ATTRIBUTE_NONNULL(1, 2, 3);
 
   void (*non_local_exit_signal) (emacs_env *env,
                                  emacs_value non_local_exit_symbol,
-                                 emacs_value non_local_exit_data);
+                                 emacs_value non_local_exit_data)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   void (*non_local_exit_throw) (emacs_env *env,
                                 emacs_value tag,
-                                emacs_value value);
+                                emacs_value value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   /* Function registration.  */
 
@@ -119,34 +133,45 @@ struct emacs_env_25
                                                          ptrdiff_t nargs,
                                                          emacs_value args[],
                                                          void *)
-                                  EMACS_NOEXCEPT,
+                                  EMACS_NOEXCEPT
+                                  EMACS_ATTRIBUTE_NONNULL(1),
                                 const char *documentation,
-                                void *data);
+                                void *data)
+    EMACS_ATTRIBUTE_NONNULL(1, 4);
 
   emacs_value (*funcall) (emacs_env *env,
                           emacs_value function,
                           ptrdiff_t nargs,
-                          emacs_value args[]);
+                          emacs_value args[])
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   emacs_value (*intern) (emacs_env *env,
-                         const char *symbol_name);
+                         const char *symbol_name)
+    EMACS_ATTRIBUTE_NONNULL(1, 2);
 
   /* Type conversion.  */
 
   emacs_value (*type_of) (emacs_env *env,
-                          emacs_value value);
+                          emacs_value value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  bool (*is_not_nil) (emacs_env *env, emacs_value value);
+  bool (*is_not_nil) (emacs_env *env, emacs_value value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  bool (*eq) (emacs_env *env, emacs_value a, emacs_value b);
+  bool (*eq) (emacs_env *env, emacs_value a, emacs_value b)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  intmax_t (*extract_integer) (emacs_env *env, emacs_value value);
+  intmax_t (*extract_integer) (emacs_env *env, emacs_value value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  emacs_value (*make_integer) (emacs_env *env, intmax_t value);
+  emacs_value (*make_integer) (emacs_env *env, intmax_t value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  double (*extract_float) (emacs_env *env, emacs_value value);
+  double (*extract_float) (emacs_env *env, emacs_value value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  emacs_value (*make_float) (emacs_env *env, double value);
+  emacs_value (*make_float) (emacs_env *env, double value)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   /* Copy the content of the Lisp string VALUE to BUFFER as an utf8
      null-terminated string.
@@ -163,40 +188,51 @@ struct emacs_env_25
   bool (*copy_string_contents) (emacs_env *env,
                                 emacs_value value,
                                 char *buffer,
-                                ptrdiff_t *size_inout);
+                                ptrdiff_t *size_inout)
+    EMACS_ATTRIBUTE_NONNULL(1, 4);
 
   /* Create a Lisp string from a utf8 encoded string.  */
   emacs_value (*make_string) (emacs_env *env,
-                              const char *contents, ptrdiff_t length);
+                              const char *contents, ptrdiff_t length)
+    EMACS_ATTRIBUTE_NONNULL(1, 2);
 
   /* Embedded pointer type.  */
   emacs_value (*make_user_ptr) (emacs_env *env,
                                 void (*fin) (void *) EMACS_NOEXCEPT,
-                                void *ptr);
+                                void *ptr)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  void *(*get_user_ptr) (emacs_env *env, emacs_value uptr);
-  void (*set_user_ptr) (emacs_env *env, emacs_value uptr, void *ptr);
+  void *(*get_user_ptr) (emacs_env *env, emacs_value uptr)
+    EMACS_ATTRIBUTE_NONNULL(1);
+  void (*set_user_ptr) (emacs_env *env, emacs_value uptr, void *ptr)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   void (*(*get_user_finalizer) (emacs_env *env, emacs_value uptr))
-    (void *) EMACS_NOEXCEPT;
+    (void *) EMACS_NOEXCEPT EMACS_ATTRIBUTE_NONNULL(1);
   void (*set_user_finalizer) (emacs_env *env,
                               emacs_value uptr,
-                              void (*fin) (void *) EMACS_NOEXCEPT);
+                              void (*fin) (void *) EMACS_NOEXCEPT)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   /* Vector functions.  */
-  emacs_value (*vec_get) (emacs_env *env, emacs_value vec, ptrdiff_t i);
+  emacs_value (*vec_get) (emacs_env *env, emacs_value vec, ptrdiff_t i)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   void (*vec_set) (emacs_env *env, emacs_value vec, ptrdiff_t i,
-                   emacs_value val);
+                   emacs_value val)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
-  ptrdiff_t (*vec_size) (emacs_env *env, emacs_value vec);
+  ptrdiff_t (*vec_size) (emacs_env *env, emacs_value vec)
+    EMACS_ATTRIBUTE_NONNULL(1);
 
   /* Returns whether a quit is pending.  */
-  bool (*should_quit) (emacs_env *env);
+  bool (*should_quit) (emacs_env *env)
+    EMACS_ATTRIBUTE_NONNULL(1);
 };
 
 /* Every module should define a function as follows.  */
-extern int emacs_module_init (struct emacs_runtime *ert);
+extern int emacs_module_init (struct emacs_runtime *ert)
+  EMACS_ATTRIBUTE_NONNULL(1);
 
 #ifdef __cplusplus
 }