erts: Add enif_snprintf

* Add the capability to format erlang terms to a char buffer in nifs.
* Bump NIF version to 2.11

3 files changed, 14 insertions, 1 deletions

diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index a695a028ba..fa20ce3c86 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -1603,6 +1603,16 @@ int enif_fprintf(void* filep, const char* format, ...)
     return ret;
 }    
 
+int enif_snprintf(char *buffer, size_t size, const char* format, ...) 
+{ 
+    int ret;
+    va_list arglist;
+    va_start(arglist, format);
+    ret = erts_vsnprintf(buffer, size, format, arglist);
+    va_end(arglist);
+    return ret;
+}
+
 /***********************************************************
  **       Memory managed (GC'ed) "resource" objects       **
  ***********************************************************/
diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index 3964f7f679..468f5cf5ec 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -50,9 +50,10 @@
 ** 2.8: 18.0 add enif_has_pending_exception
 ** 2.9: 18.2 enif_getenv
 ** 2.10: Time API
+** 2.11: 19.0 enif_snprintf
 */
 #define ERL_NIF_MAJOR_VERSION 2
-#define ERL_NIF_MINOR_VERSION 10
+#define ERL_NIF_MINOR_VERSION 11
 
 /*
  * The emulator will refuse to load a nif-lib with a major version
diff --git a/erts/emulator/beam/erl_nif_api_funcs.h b/erts/emulator/beam/erl_nif_api_funcs.h
index a5acd86551..c7389b1626 100644
--- a/erts/emulator/beam/erl_nif_api_funcs.h
+++ b/erts/emulator/beam/erl_nif_api_funcs.h
@@ -172,6 +172,7 @@ ERL_NIF_API_FUNC_DECL(int, enif_get_local_port, (ErlNifEnv* env, ERL_NIF_TERM, E
 ERL_NIF_API_FUNC_DECL(int, enif_term_to_binary, (ErlNifEnv *env, ERL_NIF_TERM term, ErlNifBinary *bin));
 ERL_NIF_API_FUNC_DECL(size_t, enif_binary_to_term, (ErlNifEnv *env, const unsigned char* data, size_t sz, ERL_NIF_TERM *term, unsigned int opts));
 ERL_NIF_API_FUNC_DECL(int, enif_port_command, (ErlNifEnv *env, const ErlNifPort* to_port, ErlNifEnv *msg_env, ERL_NIF_TERM msg));
+ERL_NIF_API_FUNC_DECL(int,enif_snprintf,(char * buffer, size_t size, const char *format, ...));
 
 /*
 ** ADD NEW ENTRIES HERE (before this comment) !!!
@@ -336,6 +337,7 @@ ERL_NIF_API_FUNC_DECL(int,enif_is_on_dirty_scheduler,(ErlNifEnv*));
 #  define enif_term_to_binary ERL_NIF_API_FUNC_MACRO(enif_term_to_binary)
 #  define enif_binary_to_term ERL_NIF_API_FUNC_MACRO(enif_binary_to_term)
 #  define enif_port_command ERL_NIF_API_FUNC_MACRO(enif_port_command)
+#  define enif_snprintf ERL_NIF_API_FUNC_MACRO(enif_snprintf)
 
 /*
 ** ADD NEW ENTRIES HERE (before this comment)