libs/smux/constr_SEQUENCE_OF.c

   1 /*-
   2  * Copyright (c) 2003, 2004, 2006 Lev Walkin <vlm@lionet.info>.
   3  * All rights reserved.
   4  * Redistribution and modifications are permitted subject to BSD license.
   5  */
   6 #include <asn_internal.h>
   7 #include <constr_SEQUENCE_OF.h>
   8 #include <asn_SEQUENCE_OF.h>
   9
  10 /*
  11  * The DER encoder of the SEQUENCE OF type.
  12  */
  13 asn_enc_rval_t
  14 SEQUENCE_OF_encode_der(const asn_TYPE_descriptor_t *td, const void *ptr,
  15                        int tag_mode, ber_tlv_tag_t tag,
  16                        asn_app_consume_bytes_f *cb, void *app_key) {
  17     asn_TYPE_member_t *elm = td->elements;
  18         const asn_anonymous_sequence_ *list = _A_CSEQUENCE_FROM_VOID(ptr);
  19         size_t computed_size = 0;
  20         ssize_t encoding_size = 0;
  21         asn_enc_rval_t erval;
  22         int edx;
  23
  24         ASN_DEBUG("Estimating size of SEQUENCE OF %s", td->name);
  25
  26         /*
  27          * Gather the length of the underlying members sequence.
  28          */
  29         for(edx = 0; edx < list->count; edx++) {
  30                 void *memb_ptr = list->array[edx];
  31                 if(!memb_ptr) continue;
  32                 erval = elm->type->op->der_encoder(elm->type, memb_ptr,
  33                         0, elm->tag,
  34                         0, 0);
  35                 if(erval.encoded == -1)
  36                         return erval;
  37                 computed_size += erval.encoded;
  38         }
  39
  40         /*
  41          * Encode the TLV for the sequence itself.
  42          */
  43         encoding_size = der_write_tags(td, computed_size, tag_mode, 1, tag,
  44                 cb, app_key);
  45         if(encoding_size == -1) {
  46                 erval.encoded = -1;
  47                 erval.failed_type = td;
  48                 erval.structure_ptr = ptr;
  49                 return erval;
  50         }
  51
  52         computed_size += encoding_size;
  53         if(!cb) {
  54                 erval.encoded = computed_size;
  55                 ASN__ENCODED_OK(erval);
  56         }
  57
  58         ASN_DEBUG("Encoding members of SEQUENCE OF %s", td->name);
  59
  60         /*
  61          * Encode all members.
  62          */
  63         for(edx = 0; edx < list->count; edx++) {
  64                 void *memb_ptr = list->array[edx];
  65                 if(!memb_ptr) continue;
  66                 erval = elm->type->op->der_encoder(elm->type, memb_ptr,
  67                         0, elm->tag,
  68                         cb, app_key);
  69                 if(erval.encoded == -1)
  70                         return erval;
  71                 encoding_size += erval.encoded;
  72         }
  73
  74         if(computed_size != (size_t)encoding_size) {
  75                 /*
  76                  * Encoded size is not equal to the computed size.
  77                  */
  78                 erval.encoded = -1;
  79                 erval.failed_type = td;
  80                 erval.structure_ptr = ptr;
  81         } else {
  82                 erval.encoded = computed_size;
  83                 erval.structure_ptr = 0;
  84                 erval.failed_type = 0;
  85         }
  86
  87         return erval;
  88 }
  89
  90 asn_enc_rval_t
  91 SEQUENCE_OF_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr,
  92                        int ilevel, enum xer_encoder_flags_e flags,
  93                        asn_app_consume_bytes_f *cb, void *app_key) {
  94     asn_enc_rval_t er;
  95     const asn_SET_OF_specifics_t *specs = (const asn_SET_OF_specifics_t *)td->specifics;
  96     const asn_TYPE_member_t *elm = td->elements;
  97     const asn_anonymous_sequence_ *list = _A_CSEQUENCE_FROM_VOID(sptr);
  98     const char *mname = specs->as_XMLValueList
  99                             ? 0
 100                             : ((*elm->name) ? elm->name : elm->type->xml_tag);
 101     size_t mlen = mname ? strlen(mname) : 0;
 102     int xcan = (flags & XER_F_CANONICAL);
 103     int i;
 104
 105     if(!sptr) ASN__ENCODE_FAILED;
 106
 107     er.encoded = 0;
 108
 109     for(i = 0; i < list->count; i++) {
 110         asn_enc_rval_t tmper;
 111         void *memb_ptr = list->array[i];
 112         if(!memb_ptr) continue;
 113
 114         if(mname) {
 115             if(!xcan) ASN__TEXT_INDENT(1, ilevel);
 116             ASN__CALLBACK3("<", 1, mname, mlen, ">", 1);
 117         }
 118
 119         tmper = elm->type->op->xer_encoder(elm->type, memb_ptr, ilevel + 1,
 120                                            flags, cb, app_key);
 121         if(tmper.encoded == -1) return tmper;
 122         er.encoded += tmper.encoded;
 123         if(tmper.encoded == 0 && specs->as_XMLValueList) {
 124             const char *name = elm->type->xml_tag;
 125             size_t len = strlen(name);
 126             if(!xcan) ASN__TEXT_INDENT(1, ilevel + 1);
 127             ASN__CALLBACK3("<", 1, name, len, "/>", 2);
 128         }
 129
 130         if(mname) {
 131             ASN__CALLBACK3("</", 2, mname, mlen, ">", 1);
 132         }
 133     }
 134
 135     if(!xcan) ASN__TEXT_INDENT(1, ilevel - 1);
 136
 137     ASN__ENCODED_OK(er);
 138 cb_failed:
 139     ASN__ENCODE_FAILED;
 140 }
 141
 142 #ifndef ASN_DISABLE_PER_SUPPORT
 143
 144 asn_enc_rval_t
 145 SEQUENCE_OF_encode_uper(const asn_TYPE_descriptor_t *td,
 146                         const asn_per_constraints_t *constraints,
 147                         const void *sptr, asn_per_outp_t *po) {
 148     const asn_anonymous_sequence_ *list;
 149         const asn_per_constraint_t *ct;
 150         asn_enc_rval_t er;
 151         const asn_TYPE_member_t *elm = td->elements;
 152         size_t encoded_edx;
 153
 154         if(!sptr) ASN__ENCODE_FAILED;
 155     list = _A_CSEQUENCE_FROM_VOID(sptr);
 156
 157     er.encoded = 0;
 158
 159         ASN_DEBUG("Encoding %s as SEQUENCE OF (%d)", td->name, list->count);
 160
 161     if(constraints) ct = &constraints->size;
 162     else if(td->encoding_constraints.per_constraints)
 163         ct = &td->encoding_constraints.per_constraints->size;
 164     else ct = 0;
 165
 166     /* If extensible constraint, check if size is in root */
 167     if(ct) {
 168         int not_in_root =
 169             (list->count < ct->lower_bound || list->count > ct->upper_bound);
 170         ASN_DEBUG("lb %ld ub %ld %s", ct->lower_bound, ct->upper_bound,
 171                   ct->flags & APC_EXTENSIBLE ? "ext" : "fix");
 172         if(ct->flags & APC_EXTENSIBLE) {
 173             /* Declare whether size is in extension root */
 174             if(per_put_few_bits(po, not_in_root, 1)) ASN__ENCODE_FAILED;
 175             if(not_in_root) ct = 0;
 176         } else if(not_in_root && ct->effective_bits >= 0) {
 177             ASN__ENCODE_FAILED;
 178         }
 179
 180     }
 181
 182     if(ct && ct->effective_bits >= 0) {
 183         /* X.691, #19.5: No length determinant */
 184         if(per_put_few_bits(po, list->count - ct->lower_bound,
 185                             ct->effective_bits))
 186             ASN__ENCODE_FAILED;
 187     } else if(list->count == 0) {
 188         /* When the list is empty add only the length determinant
 189          * X.691, #20.6 and #11.9.4.1
 190          */
 191         if (uper_put_length(po, 0, 0)) {
 192             ASN__ENCODE_FAILED;
 193         }
 194         ASN__ENCODED_OK(er);
 195     }
 196
 197     for(encoded_edx = 0; (ssize_t)encoded_edx < list->count;) {
 198         ssize_t may_encode;
 199         size_t edx;
 200         int need_eom = 0;
 201
 202         if(ct && ct->effective_bits >= 0) {
 203             may_encode = list->count;
 204         } else {
 205             may_encode =
 206                 uper_put_length(po, list->count - encoded_edx, &need_eom);
 207             if(may_encode < 0) ASN__ENCODE_FAILED;
 208         }
 209
 210         for(edx = encoded_edx; edx < encoded_edx + may_encode; edx++) {
 211             void *memb_ptr = list->array[edx];
 212             if(!memb_ptr) ASN__ENCODE_FAILED;
 213             er = elm->type->op->uper_encoder(
 214                 elm->type, elm->encoding_constraints.per_constraints, memb_ptr,
 215                 po);
 216             if(er.encoded == -1) ASN__ENCODE_FAILED;
 217         }
 218
 219         if(need_eom && uper_put_length(po, 0, 0))
 220             ASN__ENCODE_FAILED; /* End of Message length */
 221
 222         encoded_edx += may_encode;
 223     }
 224
 225         ASN__ENCODED_OK(er);
 226 }
 227
 228 #endif  /* ASN_DISABLE_PER_SUPPORT */
 229
 230 int
 231 SEQUENCE_OF_compare(const asn_TYPE_descriptor_t *td, const void *aptr,
 232                const void *bptr) {
 233     const asn_anonymous_sequence_ *a = _A_CSEQUENCE_FROM_VOID(aptr);
 234     const asn_anonymous_sequence_ *b = _A_CSEQUENCE_FROM_VOID(bptr);
 235     ssize_t idx;
 236
 237     if(a && b) {
 238         ssize_t common_length = (a->count < b->count ? a->count : b->count);
 239         for(idx = 0; idx < common_length; idx++) {
 240             int ret = td->elements->type->op->compare_struct(
 241                 td->elements->type, a->array[idx], b->array[idx]);
 242             if(ret) return ret;
 243         }
 244
 245         if(idx < b->count) /* more elements in b */
 246             return -1;    /* a is shorter, so put it first */
 247         if(idx < a->count) return 1;
 248
 249     } else if(!a) {
 250         return -1;
 251     } else if(!b) {
 252         return 1;
 253     }
 254
 255     return 0;
 256 }
 257
 258
 259 asn_TYPE_operation_t asn_OP_SEQUENCE_OF = {
 260         SEQUENCE_OF_free,
 261         SEQUENCE_OF_print,
 262         SEQUENCE_OF_compare,
 263         SEQUENCE_OF_decode_ber,
 264         SEQUENCE_OF_encode_der,
 265         SEQUENCE_OF_decode_xer,
 266         SEQUENCE_OF_encode_xer,
 267 #ifdef  ASN_DISABLE_OER_SUPPORT
 268         0,
 269         0,
 270 #else
 271         SEQUENCE_OF_decode_oer, /* Same as SET OF decoder. */
 272         SEQUENCE_OF_encode_oer, /* Same as SET OF encoder */
 273 #endif  /* ASN_DISABLE_OER_SUPPORT */
 274 #ifdef ASN_DISABLE_PER_SUPPORT
 275         0,
 276         0,
 277 #else
 278         SEQUENCE_OF_decode_uper, /* Same as SET OF decoder */
 279         SEQUENCE_OF_encode_uper,
 280 #endif /* ASN_DISABLE_PER_SUPPORT */
 281         SEQUENCE_OF_random_fill,
 282         0       /* Use generic outmost tag fetcher */
 283 };
 284