BNER: Add weak function stubs for BNER fixed encoded PDUs

Author: ringlej

libasn1compiler/asn1c_C.c

@@ -13,6 +13,7 @@
 #include <asn1fix_crange.h>	/* constraint groker from libasn1fix */
 #include <asn1fix_export.h>	/* other exportables from libasn1fix */
 #include <asn1parser.h>
+#include <regex.h>
 
 typedef struct tag2el_s {
 	struct asn1p_type_tag_s el_tag;
@@ -75,6 +76,24 @@ enum etd_spec {
 };
 static int emit_type_DEF(arg_t *arg, asn1p_expr_t *expr, enum tvm_compat tv_mode, int tags_count, int all_tags_count, int elements_count, enum etd_spec);
 
+static int is_bner_pdu_regex_init = 0;
+static regex_t bner_pdu_regex;
+
+static int init_bner(void) {
+	int ret = 0;
+
+	if(!is_bner_pdu_regex_init) {
+		ret = regcomp(&bner_pdu_regex, "BACnet.*PDU", 0);
+		if(ret == 0) is_bner_pdu_regex_init = 1;
+	}
+
+	return ret;
+}
+static int is_bner_fixed_pdu(const char *pdu_type_name) {
+	init_bner();
+	return (regexec(&bner_pdu_regex, pdu_type_name, 0, NULL, 0) == 0);
+}
+
 #define	C99_MODE	(!(arg->flags & A1C_NO_C99))
 #define	UNNAMED_UNIONS	(arg->flags & A1C_UNNAMED_UNIONS)
 #define	HIDE_INNER_DEFS	(arg->embed && !(arg->flags & A1C_ALL_DEFS_GLOBAL))
@@ -2980,7 +2999,12 @@ emit_type_DEF(arg_t *arg, asn1p_expr_t *expr, enum tvm_compat tv_mode, int tags_
 		if (!p2)
 			p2 = strdup(p);
 
-        OUT("&asn_OP_%s,\n", p2);
+		if(arg->flags & A1C_GEN_BNER
+				&& is_bner_fixed_pdu(expr->Identifier)) {
+			OUT("&asn_OP_%s,\n", expr_id);
+		} else {
+			OUT("&asn_OP_%s,\n", p2);
+		}
 
 		if(tags_count) {
 			OUT("asn_DEF_%s_tags_%d,\n",

skeletons/Makefile.am

@@ -100,20 +100,21 @@ check_PROGRAMS =                    \
     check-converter_c89_example
 
 # BNER Support
-libasn1cskeletons_la_SOURCES +=       \
-    bner_decoder.c bner_decoder.h     \
-    bner_encoder.c bner_encoder.h     \
-    bner_support.c bner_support.h     \
-    constr_CHOICE_bner.c              \
-    constr_SEQUENCE_bner.c            \
-    constr_SEQUENCE_OF_bner.c         \
-    ANY_bner.c                        \
-    BOOLEAN_bner.c                    \
-    INTEGER_bner.c                    \
-    NativeInteger_bner.c              \
-    NativeReal_bner.c                 \
-    NULL_bner.c                       \
-    OCTET_STRING_bner.c               \
+libasn1cskeletons_la_SOURCES +=           \
+    bner_decoder.c bner_decoder.h         \
+    bner_encoder.c bner_encoder.h         \
+    bner_fixed_stubs.c bner_fixed_stubs.h \
+    bner_support.c bner_support.h         \
+    constr_CHOICE_bner.c                  \
+    constr_SEQUENCE_bner.c                \
+    constr_SEQUENCE_OF_bner.c             \
+    ANY_bner.c                            \
+    BOOLEAN_bner.c                        \
+    INTEGER_bner.c                        \
+    NativeInteger_bner.c                  \
+    NativeReal_bner.c                     \
+    NULL_bner.c                           \
+    OCTET_STRING_bner.c                   \
     REAL_bner.c
 
 LDADD = -lm