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/*-
* Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
* Redistribution and modifications are permitted subject to BSD license.
*/
/*
* Please read the NativeInteger.h for the explanation wrt. differences between
* INTEGER and NativeInteger.
* Basically, both are decoders and encoders of ASN.1 INTEGER type, but this
* implementation deals with the standard (machine-specific) representation
* of them instead of using the platform-independent buffer.
*/
#include <asn_internal.h>
#include <NativeEnumerated.h>
/*
* NativeEnumerated basic type description.
*/
static ber_tlv_tag_t asn_DEF_NativeEnumerated_tags[] = {
(ASN_TAG_CLASS_UNIVERSAL | (10 << 2))
};
asn_TYPE_descriptor_t asn_DEF_NativeEnumerated = {
"ENUMERATED", /* The ASN.1 type is still ENUMERATED */
"ENUMERATED",
NativeInteger_free,
NativeInteger_print,
asn_generic_no_constraint,
NativeInteger_decode_ber,
NativeInteger_encode_der,
NativeInteger_decode_xer,
NativeEnumerated_encode_xer,
NativeEnumerated_decode_uper,
0, /* Use generic outmost tag fetcher */
asn_DEF_NativeEnumerated_tags,
sizeof(asn_DEF_NativeEnumerated_tags) / sizeof(asn_DEF_NativeEnumerated_tags[0]),
asn_DEF_NativeEnumerated_tags, /* Same as above */
sizeof(asn_DEF_NativeEnumerated_tags) / sizeof(asn_DEF_NativeEnumerated_tags[0]),
0, /* No PER visible constraints */
0, 0, /* No members */
0 /* No specifics */
};
asn_enc_rval_t
NativeEnumerated_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
int ilevel, enum xer_encoder_flags_e flags,
asn_app_consume_bytes_f *cb, void *app_key) {
asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
asn_enc_rval_t er;
const long *native = (const long *)sptr;
const asn_INTEGER_enum_map_t *el;
(void)ilevel;
(void)flags;
if(!native) _ASN_ENCODE_FAILED;
el = INTEGER_map_value2enum(specs, *native);
if(el) {
size_t srcsize = el->enum_len + 5;
char *src = (char *)alloca(srcsize);
er.encoded = snprintf(src, srcsize, "<%s/>", el->enum_name);
assert(er.encoded > 0 && (size_t)er.encoded < srcsize);
if(cb(src, er.encoded, app_key) < 0) _ASN_ENCODE_FAILED;
_ASN_ENCODED_OK(er);
} else {
ASN_DEBUG("ASN.1 forbids dealing with "
"unknown value of ENUMERATED type");
_ASN_ENCODE_FAILED;
}
}
asn_dec_rval_t
NativeEnumerated_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
asn_dec_rval_t rval = { RC_OK, 0 };
long *native = (long *)*sptr;
asn_per_constraint_t *ct;
long value;
(void)opt_codec_ctx;
if(constraints) ct = &constraints->value;
else if(td->per_constraints) ct = &td->per_constraints->value;
else _ASN_DECODE_FAILED; /* Mandatory! */
if(!specs) _ASN_DECODE_FAILED;
if(!native) {
native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
if(!native) _ASN_DECODE_FAILED;
}
ASN_DEBUG("Decoding %s as NativeEnumerated", td->name);
if(ct->flags & APC_EXTENSIBLE) {
int inext = per_get_few_bits(pd, 1);
if(inext < 0) _ASN_DECODE_FAILED;
if(inext) ct = 0;
}
if(ct && ct->range_bits >= 0) {
value = per_get_few_bits(pd, ct->range_bits);
if(value < 0) _ASN_DECODE_FAILED;
if(value >= (specs->extension
? specs->extension - 1 : specs->map_count))
_ASN_DECODE_FAILED;
} else {
if(!specs->extension)
_ASN_DECODE_FAILED;
/*
* X.691, #10.6: normally small non-negative whole number;
*/
value = uper_get_nsnnwn(pd);
if(value < 0) _ASN_DECODE_FAILED;
value += specs->extension - 1;
if(value >= specs->map_count)
_ASN_DECODE_FAILED;
}
*native = specs->value2enum[value].nat_value;
ASN_DEBUG("Decoded %s = %ld", td->name, *native);
return rval;
}
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