fix codec selection
diff --git a/skeletons/converter-sample.c b/skeletons/converter-sample.c
index aedaaa9..7a61eef 100644
--- a/skeletons/converter-sample.c
+++ b/skeletons/converter-sample.c
@@ -105,41 +105,47 @@
}
}
-
-#define HAS_CODEC(fname) ((&(((asn_TYPE_operation_t *)0)->fname)) != 0)
+#define CODEC_OFFSET(fname) ((ptrdiff_t)&(((asn_TYPE_operation_t *)0)->fname))
typedef struct {
const char *name;
enum asn_transfer_syntax syntax;
- int has_codec;
+ ptrdiff_t codec_offset;
const char *full_name;
} syntax_selector;
static syntax_selector input_encodings[] = {
- {"ber", ATS_BER, HAS_CODEC(ber_decoder),
+ {"ber", ATS_BER, CODEC_OFFSET(ber_decoder),
"Input is in BER (Basic Encoding Rules) or DER"},
- {"oer", ATS_BASIC_OER, HAS_CODEC(oer_decoder),
+ {"oer", ATS_BASIC_OER, CODEC_OFFSET(oer_decoder),
"Input is in OER (Octet Encoding Rules)"},
- {"per", ATS_UNALIGNED_BASIC_PER, HAS_CODEC(uper_decoder),
+ {"per", ATS_UNALIGNED_BASIC_PER, CODEC_OFFSET(uper_decoder),
"Input is in Unaligned PER (Packed Encoding Rules)"},
- {"xer", ATS_BASIC_XER, HAS_CODEC(xer_decoder),
+ {"xer", ATS_BASIC_XER, CODEC_OFFSET(xer_decoder),
"Input is in XER (XML Encoding Rules)"},
{0, ATS_INVALID, 0, 0}};
static syntax_selector output_encodings[] = {
- {"der", ATS_DER, HAS_CODEC(der_encoder),
+ {"der", ATS_DER, CODEC_OFFSET(der_encoder),
"Output as DER (Distinguished Encoding Rules)"},
- {"oer", ATS_CANONICAL_OER, HAS_CODEC(oer_encoder),
+ {"oer", ATS_CANONICAL_OER, CODEC_OFFSET(oer_encoder),
"Output as Canonical OER (Octet Encoding Rules)"},
- {"per", ATS_UNALIGNED_CANONICAL_PER, HAS_CODEC(uper_encoder),
+ {"per", ATS_UNALIGNED_CANONICAL_PER, CODEC_OFFSET(uper_encoder),
"Output as Unaligned PER (Packed Encoding Rules)"},
- {"xer", ATS_BASIC_XER, HAS_CODEC(xer_encoder),
+ {"xer", ATS_BASIC_XER, CODEC_OFFSET(xer_encoder),
"Output as XER (XML Encoding Rules)"},
- {"text", ATS_NONSTANDARD_PLAINTEXT, HAS_CODEC(print_struct),
+ {"text", ATS_NONSTANDARD_PLAINTEXT, CODEC_OFFSET(print_struct),
"Output as plain semi-structured text"},
- {"null", ATS_INVALID, HAS_CODEC(print_struct),
+ {"null", ATS_INVALID, CODEC_OFFSET(print_struct),
"Verify (decode) input, but do not output"},
{0, ATS_INVALID, 0, 0}};
+static int
+has_codec_defined(const asn_TYPE_descriptor_t *td,
+ const syntax_selector *element) {
+ return *(const void *const *)(const void *)((const char *)td->op
+ + element->codec_offset) != 0;
+}
+
/*
* Select ASN.1 Transfer Enocoding Syntax by command line name.
*/
@@ -149,9 +155,7 @@
const syntax_selector *element;
for(element = first_element; element->name; element++) {
if(strcmp(element->name, name) == 0) {
- if(td && td->op
- && *(const void *const *)(const void *)((const char *)td->op
- + element->has_codec)) {
+ if(td && td->op && has_codec_defined(td, element)) {
return element;
}
}