mirror of https://gerrit.osmocom.org/asn1c
126 lines
3.7 KiB
C
126 lines
3.7 KiB
C
/*-
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* Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
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* Redistribution and modifications are permitted subject to BSD license.
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*/
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/*
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* Please read the NativeInteger.h for the explanation wrt. differences between
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* INTEGER and NativeInteger.
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* Basically, both are decoders and encoders of ASN.1 INTEGER type, but this
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* implementation deals with the standard (machine-specific) representation
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* of them instead of using the platform-independent buffer.
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*/
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#include <asn_internal.h>
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#include <NativeEnumerated.h>
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/*
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* NativeEnumerated basic type description.
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*/
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static ber_tlv_tag_t asn_DEF_NativeEnumerated_tags[] = {
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(ASN_TAG_CLASS_UNIVERSAL | (10 << 2))
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};
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asn_TYPE_descriptor_t asn_DEF_NativeEnumerated = {
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"ENUMERATED", /* The ASN.1 type is still ENUMERATED */
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"ENUMERATED",
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NativeInteger_free,
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NativeInteger_print,
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asn_generic_no_constraint,
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NativeInteger_decode_ber,
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NativeInteger_encode_der,
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NativeInteger_decode_xer,
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NativeEnumerated_encode_xer,
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NativeEnumerated_decode_uper,
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0, /* Use generic outmost tag fetcher */
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asn_DEF_NativeEnumerated_tags,
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sizeof(asn_DEF_NativeEnumerated_tags) / sizeof(asn_DEF_NativeEnumerated_tags[0]),
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asn_DEF_NativeEnumerated_tags, /* Same as above */
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sizeof(asn_DEF_NativeEnumerated_tags) / sizeof(asn_DEF_NativeEnumerated_tags[0]),
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0, /* No PER visible constraints */
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0, 0, /* No members */
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0 /* No specifics */
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};
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asn_enc_rval_t
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NativeEnumerated_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
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int ilevel, enum xer_encoder_flags_e flags,
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asn_app_consume_bytes_f *cb, void *app_key) {
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asn_INTEGER_specifics_t *specs=(asn_INTEGER_specifics_t *)td->specifics;
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asn_enc_rval_t er;
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const long *native = (const long *)sptr;
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const asn_INTEGER_enum_map_t *el;
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(void)ilevel;
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(void)flags;
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if(!native) _ASN_ENCODE_FAILED;
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el = INTEGER_map_value2enum(specs, *native);
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if(el) {
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size_t srcsize = el->enum_len + 5;
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char *src = (char *)alloca(srcsize);
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er.encoded = snprintf(src, srcsize, "<%s/>", el->enum_name);
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assert(er.encoded > 0 && (size_t)er.encoded < srcsize);
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if(cb(src, er.encoded, app_key) < 0) _ASN_ENCODE_FAILED;
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_ASN_ENCODED_OK(er);
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} else {
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ASN_DEBUG("ASN.1 forbids dealing with "
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"unknown value of ENUMERATED type");
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_ASN_ENCODE_FAILED;
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}
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}
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asn_dec_rval_t
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NativeEnumerated_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
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asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
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asn_INTEGER_specifics_t *specs = (asn_INTEGER_specifics_t *)td->specifics;
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asn_dec_rval_t rval = { RC_OK, 0 };
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long *native = (long *)*sptr;
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asn_per_constraint_t *ct;
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long value;
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(void)opt_codec_ctx;
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if(constraints) ct = &constraints->value;
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else if(td->per_constraints) ct = &td->per_constraints->value;
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else _ASN_DECODE_FAILED; /* Mandatory! */
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if(!specs) _ASN_DECODE_FAILED;
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if(!native) {
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native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
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if(!native) _ASN_DECODE_FAILED;
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}
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ASN_DEBUG("Decoding %s as NativeEnumerated", td->name);
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if(ct->flags & APC_EXTENSIBLE) {
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int inext = per_get_few_bits(pd, 1);
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if(inext < 0) _ASN_DECODE_FAILED;
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if(inext) ct = 0;
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}
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if(ct && ct->range_bits >= 0) {
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value = per_get_few_bits(pd, ct->range_bits);
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if(value < 0) _ASN_DECODE_FAILED;
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if(value >= (specs->extension
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? specs->extension - 1 : specs->map_count))
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_ASN_DECODE_FAILED;
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} else {
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if(!specs->extension)
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_ASN_DECODE_FAILED;
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/*
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* X.691, #10.6: normally small non-negative whole number;
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*/
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value = uper_get_nsnnwn(pd);
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if(value < 0) _ASN_DECODE_FAILED;
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value += specs->extension - 1;
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if(value >= specs->map_count)
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_ASN_DECODE_FAILED;
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}
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*native = specs->value2enum[value].nat_value;
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ASN_DEBUG("Decoded %s = %ld", td->name, *native);
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return rval;
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}
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