| /*- |
| * Copyright (c) 2003, 2005 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| #include <asn_internal.h> |
| #include <asn_codecs_prim.h> |
| #include <NULL.h> |
| |
| /* |
| * NULL basic type description. |
| */ |
| static const ber_tlv_tag_t asn_DEF_NULL_tags[] = { |
| (ASN_TAG_CLASS_UNIVERSAL | (5 << 2)) |
| }; |
| asn_TYPE_operation_t asn_OP_NULL = { |
| NULL_free, |
| NULL_print, |
| NULL_compare, |
| NULL_decode_ber, |
| NULL_encode_der, /* Special handling of DER encoding */ |
| NULL_decode_xer, |
| NULL_encode_xer, |
| #ifdef ASN_DISABLE_OER_SUPPORT |
| 0, |
| 0, |
| #else |
| NULL_decode_oer, |
| NULL_encode_oer, |
| #endif /* ASN_DISABLE_OER_SUPPORT */ |
| #ifdef ASN_DISABLE_PER_SUPPORT |
| 0, |
| 0, |
| #else |
| NULL_decode_uper, /* Unaligned PER decoder */ |
| NULL_encode_uper, /* Unaligned PER encoder */ |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| NULL_random_fill, |
| 0 /* Use generic outmost tag fetcher */ |
| }; |
| asn_TYPE_descriptor_t asn_DEF_NULL = { |
| "NULL", |
| "NULL", |
| &asn_OP_NULL, |
| asn_DEF_NULL_tags, |
| sizeof(asn_DEF_NULL_tags) / sizeof(asn_DEF_NULL_tags[0]), |
| asn_DEF_NULL_tags, /* Same as above */ |
| sizeof(asn_DEF_NULL_tags) / sizeof(asn_DEF_NULL_tags[0]), |
| { 0, 0, asn_generic_no_constraint }, |
| 0, 0, /* No members */ |
| 0 /* No specifics */ |
| }; |
| |
| void |
| NULL_free(const asn_TYPE_descriptor_t *td, void *ptr, |
| enum asn_struct_free_method method) { |
| if(td && ptr) { |
| switch(method) { |
| case ASFM_FREE_EVERYTHING: |
| FREEMEM(ptr); |
| break; |
| case ASFM_FREE_UNDERLYING: |
| break; |
| case ASFM_FREE_UNDERLYING_AND_RESET: |
| memset(ptr, 0, sizeof(NULL_t)); |
| break; |
| } |
| } |
| } |
| |
| /* |
| * Decode NULL type. |
| */ |
| asn_dec_rval_t |
| NULL_decode_ber(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, void **bool_value, |
| const void *buf_ptr, size_t size, int tag_mode) { |
| NULL_t *st = (NULL_t *)*bool_value; |
| asn_dec_rval_t rval; |
| ber_tlv_len_t length; |
| |
| if(st == NULL) { |
| st = (NULL_t *)(*bool_value = CALLOC(1, sizeof(*st))); |
| if(st == NULL) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| } |
| |
| ASN_DEBUG("Decoding %s as NULL (tm=%d)", td->name, tag_mode); |
| |
| /* |
| * Check tags. |
| */ |
| rval = ber_check_tags(opt_codec_ctx, td, 0, buf_ptr, size, tag_mode, 0, |
| &length, 0); |
| if(rval.code != RC_OK) { |
| return rval; |
| } |
| |
| // X.690-201508, #8.8.2, length shall be zero. |
| if(length != 0) { |
| ASN_DEBUG("Decoding %s as NULL failed: too much data", td->name); |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| |
| return rval; |
| } |
| |
| asn_enc_rval_t |
| NULL_encode_der(const asn_TYPE_descriptor_t *td, const void *ptr, int tag_mode, |
| ber_tlv_tag_t tag, asn_app_consume_bytes_f *cb, void *app_key) { |
| asn_enc_rval_t erval; |
| |
| erval.encoded = der_write_tags(td, 0, tag_mode, 0, tag, cb, app_key); |
| if(erval.encoded == -1) { |
| erval.failed_type = td; |
| erval.structure_ptr = ptr; |
| } |
| |
| ASN__ENCODED_OK(erval); |
| } |
| |
| asn_enc_rval_t |
| NULL_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| enum xer_encoder_flags_e flags, asn_app_consume_bytes_f *cb, |
| void *app_key) { |
| asn_enc_rval_t er; |
| |
| (void)td; |
| (void)sptr; |
| (void)ilevel; |
| (void)flags; |
| (void)cb; |
| (void)app_key; |
| |
| /* XMLNullValue is empty */ |
| er.encoded = 0; |
| ASN__ENCODED_OK(er); |
| } |
| |
| |
| static enum xer_pbd_rval |
| NULL__xer_body_decode(const asn_TYPE_descriptor_t *td, void *sptr, |
| const void *chunk_buf, size_t chunk_size) { |
| (void)td; |
| (void)sptr; |
| (void)chunk_buf; /* Going to be empty according to the rules below. */ |
| |
| /* |
| * There must be no content in self-terminating <NULL/> tag. |
| */ |
| if(chunk_size) |
| return XPBD_BROKEN_ENCODING; |
| else |
| return XPBD_BODY_CONSUMED; |
| } |
| |
| asn_dec_rval_t |
| NULL_decode_xer(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, void **sptr, |
| const char *opt_mname, const void *buf_ptr, size_t size) { |
| return xer_decode_primitive(opt_codec_ctx, td, |
| sptr, sizeof(NULL_t), opt_mname, buf_ptr, size, |
| NULL__xer_body_decode); |
| } |
| |
| int |
| NULL_compare(const asn_TYPE_descriptor_t *td, const void *a, const void *b) { |
| (void)td; |
| (void)a; |
| (void)b; |
| return 0; |
| } |
| |
| int |
| NULL_print(const asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| (void)td; /* Unused argument */ |
| (void)ilevel; /* Unused argument */ |
| |
| if(sptr) { |
| return (cb("<present>", 9, app_key) < 0) ? -1 : 0; |
| } else { |
| return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
| } |
| } |
| |
| #ifndef ASN_DISABLE_OER_SUPPORT |
| |
| asn_dec_rval_t |
| NULL_decode_oer(const asn_codec_ctx_t *opt_codec_ctx, |
| const asn_TYPE_descriptor_t *td, |
| const asn_oer_constraints_t *constraints, void **sptr, |
| const void *ptr, size_t size) { |
| asn_dec_rval_t rv = {RC_OK, 0}; |
| (void)opt_codec_ctx; |
| (void)td; |
| (void)constraints; |
| (void)ptr; |
| (void)size; |
| |
| if(!*sptr) { |
| *sptr = MALLOC(sizeof(NULL_t)); |
| if(*sptr) { |
| *(NULL_t *)*sptr = 0; |
| } else { |
| ASN__DECODE_FAILED; |
| } |
| } |
| |
| return rv; |
| } |
| |
| asn_enc_rval_t |
| NULL_encode_oer(const asn_TYPE_descriptor_t *td, |
| const asn_oer_constraints_t *constraints, const void *sptr, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| asn_enc_rval_t er; |
| |
| (void)td; |
| (void)sptr; |
| (void)constraints; |
| (void)cb; |
| (void)app_key; |
| |
| er.encoded = 0; /* Encoding in 0 bytes. */ |
| |
| ASN__ENCODED_OK(er); |
| } |
| |
| #endif /* ASN_DISABLE_OER_SUPPORT */ |
| |
| #ifndef ASN_DISABLE_PER_SUPPORT |
| |
| asn_dec_rval_t |
| NULL_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) { |
| asn_dec_rval_t rv; |
| |
| (void)opt_codec_ctx; |
| (void)td; |
| (void)constraints; |
| (void)pd; |
| |
| if(!*sptr) { |
| *sptr = MALLOC(sizeof(NULL_t)); |
| if(*sptr) { |
| *(NULL_t *)*sptr = 0; |
| } else { |
| ASN__DECODE_FAILED; |
| } |
| } |
| |
| /* |
| * NULL type does not have content octets. |
| */ |
| |
| rv.code = RC_OK; |
| rv.consumed = 0; |
| return rv; |
| } |
| |
| asn_enc_rval_t |
| NULL_encode_uper(const asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, const void *sptr, |
| asn_per_outp_t *po) { |
| asn_enc_rval_t er; |
| |
| (void)td; |
| (void)constraints; |
| (void)sptr; |
| (void)po; |
| |
| er.encoded = 0; |
| ASN__ENCODED_OK(er); |
| } |
| |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| |
| asn_random_fill_result_t |
| NULL_random_fill(const asn_TYPE_descriptor_t *td, void **sptr, |
| const asn_encoding_constraints_t *constr, |
| size_t max_length) { |
| asn_random_fill_result_t result_ok = {ARFILL_OK, 1}; |
| asn_random_fill_result_t result_failed = {ARFILL_FAILED, 0}; |
| asn_random_fill_result_t result_skipped = {ARFILL_SKIPPED, 0}; |
| NULL_t *st = *sptr; |
| |
| (void)td; |
| (void)constr; |
| |
| if(max_length == 0) return result_skipped; |
| |
| if(st == NULL) { |
| st = (NULL_t *)(*sptr = CALLOC(1, sizeof(*st))); |
| if(st == NULL) { |
| return result_failed; |
| } |
| } |
| |
| return result_ok; |
| } |
| |