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constr_SET_OF.c

/*-
 * Copyright (c) 2003, 2004, 2005 Lev Walkin <vlm@lionet.info>.
 * All rights reserved.
 * Redistribution and modifications are permitted subject to BSD license.
 */
#include <asn_internal.h>
#include <constr_SET_OF.h>
#include <asn_SET_OF.h>

/*
 * Number of bytes left for this structure.
 * (ctx->left) indicates the number of bytes _transferred_ for the structure.
 * (size) contains the number of bytes in the buffer passed.
 */
#define     LEFT  ((size<(size_t)ctx->left)?size:(size_t)ctx->left)

/*
 * If the subprocessor function returns with an indication that it wants
 * more data, it may well be a fatal decoding problem, because the
 * size is constrained by the <TLV>'s L, even if the buffer size allows
 * reading more data.
 * For example, consider the buffer containing the following TLVs:
 * <T:5><L:1><V> <T:6>...
 * The TLV length clearly indicates that one byte is expected in V, but
 * if the V processor returns with "want more data" even if the buffer
 * contains way more data than the V processor have seen.
 */
#define     SIZE_VIOLATION    (ctx->left >= 0 && (size_t)ctx->left <= size)

/*
 * This macro "eats" the part of the buffer which is definitely "consumed",
 * i.e. was correctly converted into local representation or rightfully skipped.
 */
#undef      ADVANCE
#define     ADVANCE(num_bytes)      do {        \
            size_t num = num_bytes;       \
            ptr = ((const char *)ptr) + num;\
            size -= num;                  \
            if(ctx->left >= 0)            \
                  ctx->left -= num; \
            consumed_myself += num;       \
      } while(0)

/*
 * Switch to the next phase of parsing.
 */
#undef      NEXT_PHASE
#undef      PHASE_OUT
#define     NEXT_PHASE(ctx)   do {              \
            ctx->phase++;                 \
            ctx->step = 0;                \
      } while(0)
#define     PHASE_OUT(ctx)    do { ctx->phase = 10; } while(0)

/*
 * Return a standardized complex structure.
 */
#undef      RETURN
#define     RETURN(_code)     do {              \
            rval.code = _code;            \
            rval.consumed = consumed_myself;\
            return rval;                  \
      } while(0)

/*
 * The decoder of the SET OF type.
 */
asn_dec_rval_t
SET_OF_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
      void **struct_ptr, const void *ptr, size_t size, int tag_mode) {
      /*
       * Bring closer parts of structure description.
       */
      asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
      asn_TYPE_member_t *elm = td->elements;    /* Single one */

      /*
       * Parts of the structure being constructed.
       */
      void *st = *struct_ptr; /* Target structure. */
      asn_struct_ctx_t *ctx;  /* Decoder context */

      ber_tlv_tag_t tlv_tag;  /* T from TLV */
      asn_dec_rval_t rval;    /* Return code from subparsers */

      ssize_t consumed_myself = 0;  /* Consumed bytes from ptr */

      ASN_DEBUG("Decoding %s as SET OF", td->name);
      
      /*
       * Create the target structure if it is not present already.
       */
      if(st == 0) {
            st = *struct_ptr = CALLOC(1, specs->struct_size);
            if(st == 0) {
                  RETURN(RC_FAIL);
            }
      }

      /*
       * Restore parsing context.
       */
      ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset);
      
      /*
       * Start to parse where left previously
       */
      switch(ctx->phase) {
      case 0:
            /*
             * PHASE 0.
             * Check that the set of tags associated with given structure
             * perfectly fits our expectations.
             */

            rval = ber_check_tags(opt_codec_ctx, td, ctx, ptr, size,
                  tag_mode, 1, &ctx->left, 0);
            if(rval.code != RC_OK) {
                  ASN_DEBUG("%s tagging check failed: %d",
                        td->name, rval.code);
                  return rval;
            }

            if(ctx->left >= 0)
                  ctx->left += rval.consumed; /* ?Substracted below! */
            ADVANCE(rval.consumed);

            ASN_DEBUG("Structure consumes %ld bytes, "
                  "buffer %ld", (long)ctx->left, (long)size);

            NEXT_PHASE(ctx);
            /* Fall through */
      case 1:
            /*
             * PHASE 1.
             * From the place where we've left it previously,
             * try to decode the next item.
             */
        for(;; ctx->step = 0) {
            ssize_t tag_len;  /* Length of TLV's T */

            if(ctx->step & 1)
                  goto microphase2;

            /*
             * MICROPHASE 1: Synchronize decoding.
             */

            if(ctx->left == 0) {
                  ASN_DEBUG("End of SET OF %s", td->name);
                  /*
                   * No more things to decode.
                   * Exit out of here.
                   */
                  PHASE_OUT(ctx);
                  RETURN(RC_OK);
            }

            /*
             * Fetch the T from TLV.
             */
            tag_len = ber_fetch_tag(ptr, LEFT, &tlv_tag);
            switch(tag_len) {
            case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE);
                  /* Fall through */
            case -1: RETURN(RC_FAIL);
            }

            if(ctx->left < 0 && ((const uint8_t *)ptr)[0] == 0) {
                  if(LEFT < 2) {
                        if(SIZE_VIOLATION)
                              RETURN(RC_FAIL);
                        else
                              RETURN(RC_WMORE);
                  } else if(((const uint8_t *)ptr)[1] == 0) {
                        /*
                         * Found the terminator of the
                         * indefinite length structure.
                         */
                        break;
                  }
            }

            /* Outmost tag may be unknown and cannot be fetched/compared */
            if(elm->tag != (ber_tlv_tag_t)-1) {
                if(BER_TAGS_EQUAL(tlv_tag, elm->tag)) {
                  /*
                   * The new list member of expected type has arrived.
                   */
                } else {
                  ASN_DEBUG("Unexpected tag %s fixed SET OF %s",
                        ber_tlv_tag_string(tlv_tag), td->name);
                  ASN_DEBUG("%s SET OF has tag %s",
                        td->name, ber_tlv_tag_string(elm->tag));
                  RETURN(RC_FAIL);
                }
            }

            /*
             * MICROPHASE 2: Invoke the member-specific decoder.
             */
            ctx->step |= 1;         /* Confirm entering next microphase */
      microphase2:
            
            /*
             * Invoke the member fetch routine according to member's type
             */
            rval = elm->type->ber_decoder(opt_codec_ctx,
                        elm->type, &ctx->ptr, ptr, LEFT, 0);
            ASN_DEBUG("In %s SET OF %s code %d consumed %d",
                  td->name, elm->type->name,
                  rval.code, (int)rval.consumed);
            switch(rval.code) {
            case RC_OK:
                  {
                        asn_anonymous_set_ *list = _A_SET_FROM_VOID(st);
                        if(ASN_SET_ADD(list, ctx->ptr) != 0)
                              RETURN(RC_FAIL);
                        else
                              ctx->ptr = 0;
                  }
                  break;
            case RC_WMORE: /* More data expected */
                  if(!SIZE_VIOLATION) {
                        ADVANCE(rval.consumed);
                        RETURN(RC_WMORE);
                  }
                  /* Fall through */
            case RC_FAIL: /* Fatal error */
                  ASN_STRUCT_FREE(*elm->type, ctx->ptr);
                  ctx->ptr = 0;
                  RETURN(RC_FAIL);
            } /* switch(rval) */
            
            ADVANCE(rval.consumed);
        }   /* for(all list members) */

            NEXT_PHASE(ctx);
      case 2:
            /*
             * Read in all "end of content" TLVs.
             */
            while(ctx->left < 0) {
                  if(LEFT < 2) {
                        if(LEFT > 0 && ((const char *)ptr)[0] != 0) {
                              /* Unexpected tag */
                              RETURN(RC_FAIL);
                        } else {
                              RETURN(RC_WMORE);
                        }
                  }
                  if(((const char *)ptr)[0] == 0
                  && ((const char *)ptr)[1] == 0) {
                        ADVANCE(2);
                        ctx->left++;
                  } else {
                        RETURN(RC_FAIL);
                  }
            }

            PHASE_OUT(ctx);
      }
      
      RETURN(RC_OK);
}

/*
 * Internally visible buffer holding a single encoded element.
 */
00270 struct _el_buffer {
      uint8_t *buf;
      size_t length;
      size_t size;
};
/* Append bytes to the above structure */
static int _el_addbytes(const void *buffer, size_t size, void *el_buf_ptr) {
      struct _el_buffer *el_buf = (struct _el_buffer *)el_buf_ptr;

      if(el_buf->length + size > el_buf->size)
            return -1;

      memcpy(el_buf->buf + el_buf->length, buffer, size);

      el_buf->length += size;
      return 0;
}
static int _el_buf_cmp(const void *ap, const void *bp) {
      const struct _el_buffer *a = (const struct _el_buffer *)ap;
      const struct _el_buffer *b = (const struct _el_buffer *)bp;
      int ret;
      size_t common_len;

      if(a->length < b->length)
            common_len = a->length;
      else
            common_len = b->length;

      ret = memcmp(a->buf, b->buf, common_len);
      if(ret == 0) {
            if(a->length < b->length)
                  ret = -1;
            else if(a->length > b->length)
                  ret = 1;
      }

      return ret;
}

/*
 * The DER encoder of the SET OF type.
 */
asn_enc_rval_t
SET_OF_encode_der(asn_TYPE_descriptor_t *td, void *ptr,
      int tag_mode, ber_tlv_tag_t tag,
      asn_app_consume_bytes_f *cb, void *app_key) {
      asn_TYPE_member_t *elm = td->elements;
      asn_TYPE_descriptor_t *elm_type = elm->type;
      der_type_encoder_f *der_encoder = elm_type->der_encoder;
      asn_anonymous_set_ *list = _A_SET_FROM_VOID(ptr);
      size_t computed_size = 0;
      ssize_t encoding_size = 0;
      struct _el_buffer *encoded_els;
      ssize_t eels_count = 0;
      size_t max_encoded_len = 1;
      asn_enc_rval_t erval;
      int ret;
      int edx;

      ASN_DEBUG("Estimating size for SET OF %s", td->name);

      /*
       * Gather the length of the underlying members sequence.
       */
      for(edx = 0; edx < list->count; edx++) {
            void *memb_ptr = list->array[edx];
            if(!memb_ptr) continue;
            erval = der_encoder(elm_type, memb_ptr, 0, elm->tag, 0, 0);
            if(erval.encoded == -1)
                  return erval;
            computed_size += erval.encoded;

            /* Compute maximum encoding's size */
            if(max_encoded_len < (size_t)erval.encoded)
                  max_encoded_len = erval.encoded;
      }

      /*
       * Encode the TLV for the sequence itself.
       */
      encoding_size = der_write_tags(td, computed_size, tag_mode, 1, tag,
            cb, app_key);
      if(encoding_size == -1) {
            erval.encoded = -1;
            erval.failed_type = td;
            erval.structure_ptr = ptr;
            return erval;
      }
      computed_size += encoding_size;

      if(!cb || list->count == 0) {
            erval.encoded = computed_size;
            _ASN_ENCODED_OK(erval);
      }

      /*
       * DER mandates dynamic sorting of the SET OF elements
       * according to their encodings. Build an array of the
       * encoded elements.
       */
      encoded_els = (struct _el_buffer *)MALLOC(
                        list->count * sizeof(encoded_els[0]));
      if(encoded_els == NULL) {
            erval.encoded = -1;
            erval.failed_type = td;
            erval.structure_ptr = ptr;
            return erval;
      }

      ASN_DEBUG("Encoding members of %s SET OF", td->name);

      /*
       * Encode all members.
       */
      for(edx = 0; edx < list->count; edx++) {
            void *memb_ptr = list->array[edx];
            struct _el_buffer *encoded_el = &encoded_els[eels_count];

            if(!memb_ptr) continue;

            /*
             * Prepare space for encoding.
             */
            encoded_el->buf = (uint8_t *)MALLOC(max_encoded_len);
            if(encoded_el->buf) {
                  encoded_el->length = 0;
                  encoded_el->size = max_encoded_len;
            } else {
                  for(edx--; edx >= 0; edx--)
                        FREEMEM(encoded_els[edx].buf);
                  FREEMEM(encoded_els);
                  erval.encoded = -1;
                  erval.failed_type = td;
                  erval.structure_ptr = ptr;
                  return erval;
            }

            /*
             * Encode the member into the prepared space.
             */
            erval = der_encoder(elm_type, memb_ptr, 0, elm->tag,
                  _el_addbytes, encoded_el);
            if(erval.encoded == -1) {
                  for(; edx >= 0; edx--)
                        FREEMEM(encoded_els[edx].buf);
                  FREEMEM(encoded_els);
                  return erval;
            }
            encoding_size += erval.encoded;
            eels_count++;
      }

      /*
       * Sort the encoded elements according to their encoding.
       */
      qsort(encoded_els, eels_count, sizeof(encoded_els[0]), _el_buf_cmp);

      /*
       * Report encoded elements to the application.
       * Dispose of temporary sorted members table.
       */
      ret = 0;
      for(edx = 0; edx < eels_count; edx++) {
            struct _el_buffer *encoded_el = &encoded_els[edx];
            /* Report encoded chunks to the application */
            if(ret == 0
            && cb(encoded_el->buf, encoded_el->length, app_key) < 0)
                  ret = -1;
            FREEMEM(encoded_el->buf);
      }
      FREEMEM(encoded_els);

      if(ret || computed_size != (size_t)encoding_size) {
            /*
             * Standard callback failed, or
             * encoded size is not equal to the computed size.
             */
            erval.encoded = -1;
            erval.failed_type = td;
            erval.structure_ptr = ptr;
      } else {
            erval.encoded = computed_size;
      }

      _ASN_ENCODED_OK(erval);
}

#undef      XER_ADVANCE
#define     XER_ADVANCE(num_bytes)  do {              \
            size_t num = num_bytes;             \
            buf_ptr = ((const char *)buf_ptr) + num;\
            size -= num;                        \
            consumed_myself += num;             \
      } while(0)

/*
 * Decode the XER (XML) data.
 */
asn_dec_rval_t
SET_OF_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
      void **struct_ptr, const char *opt_mname,
            const void *buf_ptr, size_t size) {
      /*
       * Bring closer parts of structure description.
       */
      asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
      asn_TYPE_member_t *element = td->elements;
      const char *elm_tag;
      const char *xml_tag = opt_mname ? opt_mname : td->xml_tag;

      /*
       * ... and parts of the structure being constructed.
       */
      void *st = *struct_ptr; /* Target structure. */
      asn_struct_ctx_t *ctx;  /* Decoder context */

      asn_dec_rval_t rval;          /* Return value from a decoder */
      ssize_t consumed_myself = 0;  /* Consumed bytes from ptr */

      /*
       * Create the target structure if it is not present already.
       */
      if(st == 0) {
            st = *struct_ptr = CALLOC(1, specs->struct_size);
            if(st == 0) RETURN(RC_FAIL);
      }

      /* Which tag is expected for the downstream */
      if(specs->as_XMLValueList) {
            elm_tag = (specs->as_XMLValueList == 1) ? 0 : "";
      } else {
            elm_tag = (*element->name)
                        ? element->name : element->type->xml_tag;
      }

      /*
       * Restore parsing context.
       */
      ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset);

      /*
       * Phases of XER/XML processing:
       * Phase 0: Check that the opening tag matches our expectations.
       * Phase 1: Processing body and reacting on closing tag.
       * Phase 2: Processing inner type.
       */
      for(; ctx->phase <= 2;) {
            pxer_chunk_type_e ch_type;    /* XER chunk type */
            ssize_t ch_size;        /* Chunk size */
            xer_check_tag_e tcv;          /* Tag check value */

            /*
             * Go inside the inner member of a set.
             */
            if(ctx->phase == 2) {
                  asn_dec_rval_t tmprval;

                  /* Invoke the inner type decoder, m.b. multiple times */
                  ASN_DEBUG("XER/SET OF element [%s]", elm_tag);
                  tmprval = element->type->xer_decoder(opt_codec_ctx,
                              element->type, &ctx->ptr, elm_tag,
                              buf_ptr, size);
                  if(tmprval.code == RC_OK) {
                        asn_anonymous_set_ *list = _A_SET_FROM_VOID(st);
                        if(ASN_SET_ADD(list, ctx->ptr) != 0)
                              RETURN(RC_FAIL);
                        ctx->ptr = 0;
                        XER_ADVANCE(tmprval.consumed);
                  } else {
                        XER_ADVANCE(tmprval.consumed);
                        RETURN(tmprval.code);
                  }
                  ctx->phase = 1;   /* Back to body processing */
                  ASN_DEBUG("XER/SET OF phase => %d", ctx->phase);
                  /* Fall through */
            }

            /*
             * Get the next part of the XML stream.
             */
            ch_size = xer_next_token(&ctx->context,
                  buf_ptr, size, &ch_type);
            switch(ch_size) {
            case -1: RETURN(RC_FAIL);
            case 0:  RETURN(RC_WMORE);
            default:
                  switch(ch_type) {
                  case PXER_COMMENT:      /* Got XML comment */
                  case PXER_TEXT:         /* Ignore free-standing text */
                        XER_ADVANCE(ch_size);   /* Skip silently */
                        continue;
                  case PXER_TAG:
                        break;      /* Check the rest down there */
                  }
            }

            tcv = xer_check_tag(buf_ptr, ch_size, xml_tag);
            ASN_DEBUG("XER/SET OF: tcv = %d, ph=%d t=%s",
                  tcv, ctx->phase, xml_tag);
            switch(tcv) {
            case XCT_CLOSING:
                  if(ctx->phase == 0) break;
                  ctx->phase = 0;
                  /* Fall through */
            case XCT_BOTH:
                  if(ctx->phase == 0) {
                        /* No more things to decode */
                        XER_ADVANCE(ch_size);
                        ctx->phase = 3;   /* Phase out */
                        RETURN(RC_OK);
                  }
                  /* Fall through */
            case XCT_OPENING:
                  if(ctx->phase == 0) {
                        XER_ADVANCE(ch_size);
                        ctx->phase = 1;   /* Processing body phase */
                        continue;
                  }
                  /* Fall through */
            case XCT_UNKNOWN_OP:
            case XCT_UNKNOWN_BO:

                  ASN_DEBUG("XER/SET OF: tcv=%d, ph=%d", tcv, ctx->phase);
                  if(ctx->phase == 1) {
                        /*
                         * Process a single possible member.
                         */
                        ctx->phase = 2;
                        continue;
                  }
                  /* Fall through */
            default:
                  break;
            }

            ASN_DEBUG("Unexpected XML tag in SET OF");
            break;
      }

      ctx->phase = 3;   /* "Phase out" on hard failure */
      RETURN(RC_FAIL);
}



00615 typedef struct xer_tmp_enc_s {
      void *buffer;
      size_t offset;
      size_t size;
} xer_tmp_enc_t;
static int
SET_OF_encode_xer_callback(const void *buffer, size_t size, void *key) {
      xer_tmp_enc_t *t = (xer_tmp_enc_t *)key;
      if(t->offset + size >= t->size) {
            size_t newsize = (t->size << 2) + size;
            void *p = REALLOC(t->buffer, newsize);
            if(!p) return -1;
            t->buffer = p;
            t->size = newsize;
      }
      memcpy((char *)t->buffer + t->offset, buffer, size);
      t->offset += size;
      return 0;
}
static int
SET_OF_xer_order(const void *aptr, const void *bptr) {
      const xer_tmp_enc_t *a = (const xer_tmp_enc_t *)aptr;
      const xer_tmp_enc_t *b = (const xer_tmp_enc_t *)bptr;
      size_t minlen = a->offset;
      int ret;
      if(b->offset < minlen) minlen = b->offset;
      /* Well-formed UTF-8 has this nice lexicographical property... */
      ret = memcmp(a->buffer, b->buffer, minlen);
      if(ret != 0) return ret;
      if(a->offset == b->offset)
            return 0;
      if(a->offset == minlen)
            return -1;
      return 1;
}


asn_enc_rval_t
SET_OF_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_enc_rval_t er;
      asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
      asn_TYPE_member_t *elm = td->elements;
      asn_anonymous_set_ *list = _A_SET_FROM_VOID(sptr);
      const char *mname = specs->as_XMLValueList
            ? 0 : ((*elm->name) ? elm->name : elm->type->xml_tag);
      size_t mlen = mname ? strlen(mname) : 0;
      int xcan = (flags & XER_F_CANONICAL);
      xer_tmp_enc_t *encs = 0;
      size_t encs_count = 0;
      void *original_app_key = app_key;
      asn_app_consume_bytes_f *original_cb = cb;
      int i;

      if(!sptr) _ASN_ENCODE_FAILED;

      if(xcan) {
            encs = (xer_tmp_enc_t *)MALLOC(list->count * sizeof(encs[0]));
            if(!encs) _ASN_ENCODE_FAILED;
            cb = SET_OF_encode_xer_callback;
      }

      er.encoded = 0;

      for(i = 0; i < list->count; i++) {
            asn_enc_rval_t tmper;

            void *memb_ptr = list->array[i];
            if(!memb_ptr) continue;

            if(encs) {
                  memset(&encs[encs_count], 0, sizeof(encs[0]));
                  app_key = &encs[encs_count];
                  encs_count++;
            }

            if(mname) {
                  if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel);
                  _ASN_CALLBACK3("<", 1, mname, mlen, ">", 1);
            }

            if(!xcan && specs->as_XMLValueList == 1)
                  _i_ASN_TEXT_INDENT(1, ilevel + 1);
            tmper = elm->type->xer_encoder(elm->type, memb_ptr,
                        ilevel + (specs->as_XMLValueList != 2),
                        flags, cb, app_key);
            if(tmper.encoded == -1) {
                  td = tmper.failed_type;
                  sptr = tmper.structure_ptr;
                  goto cb_failed;
            }
            if(tmper.encoded == 0 && specs->as_XMLValueList) {
                  const char *name = elm->type->xml_tag;
                  size_t len = strlen(name);
                  _ASN_CALLBACK3("<", 1, name, len, "/>", 2);
            }

            if(mname) {
                  _ASN_CALLBACK3("</", 2, mname, mlen, ">", 1);
                  er.encoded += 5;
            }

            er.encoded += (2 * mlen) + tmper.encoded;
      }

      if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1);

      if(encs) {
            xer_tmp_enc_t *enc = encs;
            xer_tmp_enc_t *end = encs + encs_count;
            ssize_t control_size = 0;

            cb = original_cb;
            app_key = original_app_key;
            qsort(encs, encs_count, sizeof(encs[0]), SET_OF_xer_order);

            for(; enc < end; enc++) {
                  _ASN_CALLBACK(enc->buffer, enc->offset);
                  FREEMEM(enc->buffer);
                  enc->buffer = 0;
                  control_size += enc->offset;
            }
            assert(control_size == er.encoded);
      }

      goto cleanup;
cb_failed:
      er.encoded = -1;
      er.failed_type = td;
      er.structure_ptr = sptr;
cleanup:
      if(encs) {
            while(encs_count-- > 0) {
                  if(encs[encs_count].buffer)
                        FREEMEM(encs[encs_count].buffer);
            }
            FREEMEM(encs);
      }
      _ASN_ENCODED_OK(er);
}

int
SET_OF_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
            asn_app_consume_bytes_f *cb, void *app_key) {
      asn_TYPE_member_t *elm = td->elements;
      const asn_anonymous_set_ *list = _A_CSET_FROM_VOID(sptr);
      int ret;
      int i;

      if(!sptr) return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;

      /* Dump preamble */
      if(cb(td->name, strlen(td->name), app_key) < 0
      || cb(" ::= {", 6, app_key) < 0)
            return -1;

      for(i = 0; i < list->count; i++) {
            const void *memb_ptr = list->array[i];
            if(!memb_ptr) continue;

            _i_INDENT(1);

            ret = elm->type->print_struct(elm->type, memb_ptr,
                  ilevel + 1, cb, app_key);
            if(ret) return ret;
      }

      ilevel--;
      _i_INDENT(1);

      return (cb("}", 1, app_key) < 0) ? -1 : 0;
}

void
SET_OF_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) {
      if(td && ptr) {
            asn_SET_OF_specifics_t *specs;
            asn_TYPE_member_t *elm = td->elements;
            asn_anonymous_set_ *list = _A_SET_FROM_VOID(ptr);
            asn_struct_ctx_t *ctx;  /* Decoder context */
            int i;

            /*
             * Could not use set_of_empty() because of (*free)
             * incompatibility.
             */
            for(i = 0; i < list->count; i++) {
                  void *memb_ptr = list->array[i];
                  if(memb_ptr)
                  ASN_STRUCT_FREE(*elm->type, memb_ptr);
            }
            list->count = 0;  /* No meaningful elements left */

            asn_set_empty(list);    /* Remove (list->array) */

            specs = (asn_SET_OF_specifics_t *)td->specifics;
            ctx = (asn_struct_ctx_t *)((char *)ptr + specs->ctx_offset);
            if(ctx->ptr) {
                  ASN_STRUCT_FREE(*elm->type, ctx->ptr);
                  ctx->ptr = 0;
            }

            if(!contents_only) {
                  FREEMEM(ptr);
            }
      }
}

int
SET_OF_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
            asn_app_constraint_failed_f *ctfailcb, void *app_key) {
      asn_TYPE_member_t *elm = td->elements;
      asn_constr_check_f *constr;
      const asn_anonymous_set_ *list = _A_CSET_FROM_VOID(sptr);
      int i;

      if(!sptr) {
            _ASN_CTFAIL(app_key, td, sptr,
                  "%s: value not given (%s:%d)",
                  td->name, __FILE__, __LINE__);
            return -1;
      }

      constr = elm->memb_constraints;
      if(!constr) constr = elm->type->check_constraints;

      /*
       * Iterate over the members of an array.
       * Validate each in turn, until one fails.
       */
      for(i = 0; i < list->count; i++) {
            const void *memb_ptr = list->array[i];
            int ret;

            if(!memb_ptr) continue;

            ret = constr(elm->type, memb_ptr, ctfailcb, app_key);
            if(ret) return ret;
      }

      /*
       * Cannot inherit it eralier:
       * need to make sure we get the updated version.
       */
      if(!elm->memb_constraints)
            elm->memb_constraints = elm->type->check_constraints;

      return 0;
}

asn_dec_rval_t
SET_OF_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_dec_rval_t rv;
        asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
      asn_TYPE_member_t *elm = td->elements;    /* Single one */
      void *st = *sptr;
      asn_anonymous_set_ *list;
      asn_per_constraint_t *ct;
      int repeat = 0;
      ssize_t nelems;

      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;
      }                                                                       
      list = _A_SET_FROM_VOID(st);

      /* Figure out which constraints to use */
      if(constraints) ct = &constraints->size;
      else if(td->per_constraints) ct = &td->per_constraints->size;
      else ct = 0;

      if(ct && ct->flags & APC_EXTENSIBLE) {
            int value = per_get_few_bits(pd, 1);
            if(value < 0) _ASN_DECODE_STARVED;
            if(value) ct = 0; /* Not restricted! */
      }

      if(ct && ct->effective_bits >= 0) {
            /* X.691, #19.5: No length determinant */
            nelems = per_get_few_bits(pd, ct->effective_bits);
            ASN_DEBUG("Preparing to fetch %ld+%ld elements from %s",
                  (long)nelems, ct->lower_bound, td->name);
            if(nelems < 0)  _ASN_DECODE_STARVED;
            nelems += ct->lower_bound;
      } else {
            nelems = -1;
      }

      do {
            int i;
            if(nelems < 0) {
                  nelems = uper_get_length(pd,
                        ct ? ct->effective_bits : -1, &repeat);
                  ASN_DEBUG("Got to decode %d elements (eff %d)",
                        (int)nelems, (int)ct ? ct->effective_bits : -1);
                  if(nelems < 0) _ASN_DECODE_STARVED;
            }

            for(i = 0; i < nelems; i++) {
                  void *ptr = 0;
                  ASN_DEBUG("SET OF %s decoding", elm->type->name);
                  rv = elm->type->uper_decoder(opt_codec_ctx, elm->type,
                        elm->per_constraints, &ptr, pd);
                  ASN_DEBUG("%s SET OF %s decoded %d, %p",
                        td->name, elm->type->name, rv.code, ptr);
                  if(rv.code == RC_OK) {
                        if(ASN_SET_ADD(list, ptr) == 0)
                              continue;
                        ASN_DEBUG("Failed to add element into %s",
                              td->name);
                        /* Fall through */
                        rv.code = RC_FAIL;
                  } else {
                        ASN_DEBUG("Failed decoding %s of %s (SET OF)",
                              elm->type->name, td->name);
                  }
                  if(ptr) ASN_STRUCT_FREE(*elm->type, ptr);
                  return rv;
            }

            nelems = -1;      /* Allow uper_get_length() */
      } while(repeat);

      ASN_DEBUG("Decoded %s as SET OF", td->name);

      rv.code = RC_OK;
      rv.consumed = 0;
      return rv;
}


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