X-Git-Url: https://gerrit.o-ran-sc.org/r/gitweb?p=sim%2Fe2-interface.git;a=blobdiff_plain;f=e2sim%2Fasn1c%2Fconstr_CHOICE_uper.c;fp=e2sim%2Fasn1c%2Fconstr_CHOICE_uper.c;h=77aab6d6aff4e053330d9d14864bc2522c2cb093;hp=0000000000000000000000000000000000000000;hb=f5900596513e4359fc839ba361da085674e90b68;hpb=215d350dbe06a4c7ee370815f26128a7f7e160cb diff --git a/e2sim/asn1c/constr_CHOICE_uper.c b/e2sim/asn1c/constr_CHOICE_uper.c new file mode 100644 index 0000000..77aab6d --- /dev/null +++ b/e2sim/asn1c/constr_CHOICE_uper.c @@ -0,0 +1,191 @@ +/* + * Copyright (c) 2017 Lev Walkin . + * All rights reserved. + * Redistribution and modifications are permitted subject to BSD license. + */ +#include +#include +#include + +asn_dec_rval_t +CHOICE_decode_uper(const asn_codec_ctx_t *opt_codec_ctx, + const asn_TYPE_descriptor_t *td, + const asn_per_constraints_t *constraints, void **sptr, + asn_per_data_t *pd) { + const asn_CHOICE_specifics_t *specs = + (const asn_CHOICE_specifics_t *)td->specifics; + asn_dec_rval_t rv; + const asn_per_constraint_t *ct; + asn_TYPE_member_t *elm; /* CHOICE's element */ + void *memb_ptr; + void **memb_ptr2; + void *st = *sptr; + int value; + + if(ASN__STACK_OVERFLOW_CHECK(opt_codec_ctx)) + ASN__DECODE_FAILED; + + /* + * Create the target structure if it is not present already. + */ + if(!st) { + st = *sptr = CALLOC(1, specs->struct_size); + if(!st) ASN__DECODE_FAILED; + } + + if(constraints) ct = &constraints->value; + else if(td->encoding_constraints.per_constraints) ct = &td->encoding_constraints.per_constraints->value; + else ct = 0; + + if(ct && ct->flags & APC_EXTENSIBLE) { + value = per_get_few_bits(pd, 1); + if(value < 0) ASN__DECODE_STARVED; + if(value) ct = 0; /* Not restricted */ + } + + if(ct && ct->range_bits >= 0) { + value = per_get_few_bits(pd, ct->range_bits); + if(value < 0) ASN__DECODE_STARVED; + ASN_DEBUG("CHOICE %s got index %d in range %d", + td->name, value, ct->range_bits); + if(value > ct->upper_bound) + ASN__DECODE_FAILED; + } else { + if(specs->ext_start == -1) + ASN__DECODE_FAILED; + value = uper_get_nsnnwn(pd); + if(value < 0) ASN__DECODE_STARVED; + value += specs->ext_start; + if((unsigned)value >= td->elements_count) + ASN__DECODE_FAILED; + } + + /* Adjust if canonical order is different from natural order */ + if(specs->from_canonical_order) { + ASN_DEBUG("CHOICE presence from wire %d", value); + value = specs->from_canonical_order[value]; + ASN_DEBUG("CHOICE presence index effective %d", value); + } + + /* Set presence to be able to free it later */ + _set_present_idx(st, specs->pres_offset, specs->pres_size, value + 1); + + elm = &td->elements[value]; + if(elm->flags & ATF_POINTER) { + /* Member is a pointer to another structure */ + memb_ptr2 = (void **)((char *)st + elm->memb_offset); + } else { + memb_ptr = (char *)st + elm->memb_offset; + memb_ptr2 = &memb_ptr; + } + ASN_DEBUG("Discovered CHOICE %s encodes %s", td->name, elm->name); + + if(ct && ct->range_bits >= 0) { + rv = elm->type->op->uper_decoder(opt_codec_ctx, elm->type, + elm->encoding_constraints.per_constraints, + memb_ptr2, pd); + } else { + rv = uper_open_type_get(opt_codec_ctx, elm->type, + elm->encoding_constraints.per_constraints, + memb_ptr2, pd); + } + + if(rv.code != RC_OK) + ASN_DEBUG("Failed to decode %s in %s (CHOICE) %d", + elm->name, td->name, rv.code); + return rv; +} + +asn_enc_rval_t +CHOICE_encode_uper(const asn_TYPE_descriptor_t *td, + const asn_per_constraints_t *constraints, const void *sptr, + asn_per_outp_t *po) { + const asn_CHOICE_specifics_t *specs = (const asn_CHOICE_specifics_t *)td->specifics; + asn_TYPE_member_t *elm; /* CHOICE's element */ + const asn_per_constraint_t *ct; + const void *memb_ptr; + unsigned present; + int present_enc; + + if(!sptr) ASN__ENCODE_FAILED; + + ASN_DEBUG("Encoding %s as CHOICE", td->name); + + if(constraints) ct = &constraints->value; + else if(td->encoding_constraints.per_constraints) + ct = &td->encoding_constraints.per_constraints->value; + else ct = 0; + + present = _fetch_present_idx(sptr, specs->pres_offset, specs->pres_size); + + /* + * If the structure was not initialized properly, it cannot be encoded: + * can't deduce what to encode in the choice type. + */ + if(present == 0 || present > td->elements_count) + ASN__ENCODE_FAILED; + else + present--; + + ASN_DEBUG("Encoding %s CHOICE element %d", td->name, present); + + /* Adjust if canonical order is different from natural order */ + if(specs->to_canonical_order) + present_enc = specs->to_canonical_order[present]; + else + present_enc = present; + + if(ct && ct->range_bits >= 0) { + if(present_enc < ct->lower_bound + || present_enc > ct->upper_bound) { + if(ct->flags & APC_EXTENSIBLE) { + ASN_DEBUG( + "CHOICE member %d (enc %d) is an extension (%ld..%ld)", + present, present_enc, ct->lower_bound, ct->upper_bound); + if(per_put_few_bits(po, 1, 1)) + ASN__ENCODE_FAILED; + } else { + ASN__ENCODE_FAILED; + } + ct = 0; + } + } + if(ct && ct->flags & APC_EXTENSIBLE) { + ASN_DEBUG("CHOICE member %d (enc %d) is not an extension (%ld..%ld)", + present, present_enc, ct->lower_bound, ct->upper_bound); + if(per_put_few_bits(po, 0, 1)) + ASN__ENCODE_FAILED; + } + + + elm = &td->elements[present]; + ASN_DEBUG("CHOICE member \"%s\" %d (as %d)", elm->name, present, + present_enc); + if(elm->flags & ATF_POINTER) { + /* Member is a pointer to another structure */ + memb_ptr = + *(const void *const *)((const char *)sptr + elm->memb_offset); + if(!memb_ptr) ASN__ENCODE_FAILED; + } else { + memb_ptr = (const char *)sptr + elm->memb_offset; + } + + if(ct && ct->range_bits >= 0) { + if(per_put_few_bits(po, present_enc, ct->range_bits)) + ASN__ENCODE_FAILED; + + return elm->type->op->uper_encoder( + elm->type, elm->encoding_constraints.per_constraints, memb_ptr, po); + } else { + asn_enc_rval_t rval = {0,0,0}; + if(specs->ext_start == -1) ASN__ENCODE_FAILED; + if(uper_put_nsnnwn(po, present_enc - specs->ext_start)) + ASN__ENCODE_FAILED; + if(uper_open_type_put(elm->type, + elm->encoding_constraints.per_constraints, + memb_ptr, po)) + ASN__ENCODE_FAILED; + rval.encoded = 0; + ASN__ENCODED_OK(rval); + } +}