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Variable scope reduction.
[stg.git] / stglibs / smux.lib / constr_SET_OF.c
1 /*-
2  * Copyright (c) 2003, 2004, 2005 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_SET_OF.h>
8 #include <asn_SET_OF.h>
9
10 /*
11  * Number of bytes left for this structure.
12  * (ctx->left) indicates the number of bytes _transferred_ for the structure.
13  * (size) contains the number of bytes in the buffer passed.
14  */
15 #define LEFT    ((size<(size_t)ctx->left)?size:(size_t)ctx->left)
16
17 /*
18  * If the subprocessor function returns with an indication that it wants
19  * more data, it may well be a fatal decoding problem, because the
20  * size is constrained by the <TLV>'s L, even if the buffer size allows
21  * reading more data.
22  * For example, consider the buffer containing the following TLVs:
23  * <T:5><L:1><V> <T:6>...
24  * The TLV length clearly indicates that one byte is expected in V, but
25  * if the V processor returns with "want more data" even if the buffer
26  * contains way more data than the V processor have seen.
27  */
28 #define SIZE_VIOLATION  (ctx->left >= 0 && (size_t)ctx->left <= size)
29
30 /*
31  * This macro "eats" the part of the buffer which is definitely "consumed",
32  * i.e. was correctly converted into local representation or rightfully skipped.
33  */
34 #undef  ADVANCE
35 #define ADVANCE(num_bytes)      do {            \
36                 size_t num = num_bytes;         \
37                 ptr = ((const char *)ptr) + num;\
38                 size -= num;                    \
39                 if(ctx->left >= 0)              \
40                         ctx->left -= num;       \
41                 consumed_myself += num;         \
42         } while(0)
43
44 /*
45  * Switch to the next phase of parsing.
46  */
47 #undef  NEXT_PHASE
48 #undef  PHASE_OUT
49 #define NEXT_PHASE(ctx) do {                    \
50                 ctx->phase++;                   \
51                 ctx->step = 0;                  \
52         } while(0)
53 #define PHASE_OUT(ctx)  do { ctx->phase = 10; } while(0)
54
55 /*
56  * Return a standardized complex structure.
57  */
58 #undef  RETURN
59 #define RETURN(_code)   do {                    \
60                 rval.code = _code;              \
61                 rval.consumed = consumed_myself;\
62                 return rval;                    \
63         } while(0)
64
65 /*
66  * The decoder of the SET OF type.
67  */
68 asn_dec_rval_t
69 SET_OF_decode_ber(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
70         void **struct_ptr, const void *ptr, size_t size, int tag_mode) {
71         /*
72          * Bring closer parts of structure description.
73          */
74         asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
75         asn_TYPE_member_t *elm = td->elements;  /* Single one */
76
77         /*
78          * Parts of the structure being constructed.
79          */
80         void *st = *struct_ptr; /* Target structure. */
81         asn_struct_ctx_t *ctx;  /* Decoder context */
82
83         ber_tlv_tag_t tlv_tag;  /* T from TLV */
84         asn_dec_rval_t rval;    /* Return code from subparsers */
85
86         ssize_t consumed_myself = 0;    /* Consumed bytes from ptr */
87
88         ASN_DEBUG("Decoding %s as SET OF", td->name);
89         
90         /*
91          * Create the target structure if it is not present already.
92          */
93         if(st == 0) {
94                 st = *struct_ptr = CALLOC(1, specs->struct_size);
95                 if(st == 0) {
96                         RETURN(RC_FAIL);
97                 }
98         }
99
100         /*
101          * Restore parsing context.
102          */
103         ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset);
104         
105         /*
106          * Start to parse where left previously
107          */
108         switch(ctx->phase) {
109         case 0:
110                 /*
111                  * PHASE 0.
112                  * Check that the set of tags associated with given structure
113                  * perfectly fits our expectations.
114                  */
115
116                 rval = ber_check_tags(opt_codec_ctx, td, ctx, ptr, size,
117                         tag_mode, 1, &ctx->left, 0);
118                 if(rval.code != RC_OK) {
119                         ASN_DEBUG("%s tagging check failed: %d",
120                                 td->name, rval.code);
121                         return rval;
122                 }
123
124                 if(ctx->left >= 0)
125                         ctx->left += rval.consumed; /* ?Substracted below! */
126                 ADVANCE(rval.consumed);
127
128                 ASN_DEBUG("Structure consumes %ld bytes, "
129                         "buffer %ld", (long)ctx->left, (long)size);
130
131                 NEXT_PHASE(ctx);
132                 /* Fall through */
133         case 1:
134                 /*
135                  * PHASE 1.
136                  * From the place where we've left it previously,
137                  * try to decode the next item.
138                  */
139           for(;; ctx->step = 0) {
140                 ssize_t tag_len;        /* Length of TLV's T */
141
142                 if(ctx->step & 1)
143                         goto microphase2;
144
145                 /*
146                  * MICROPHASE 1: Synchronize decoding.
147                  */
148
149                 if(ctx->left == 0) {
150                         ASN_DEBUG("End of SET OF %s", td->name);
151                         /*
152                          * No more things to decode.
153                          * Exit out of here.
154                          */
155                         PHASE_OUT(ctx);
156                         RETURN(RC_OK);
157                 }
158
159                 /*
160                  * Fetch the T from TLV.
161                  */
162                 tag_len = ber_fetch_tag(ptr, LEFT, &tlv_tag);
163                 switch(tag_len) {
164                 case 0: if(!SIZE_VIOLATION) RETURN(RC_WMORE);
165                         /* Fall through */
166                 case -1: RETURN(RC_FAIL);
167                 }
168
169                 if(ctx->left < 0 && ((const uint8_t *)ptr)[0] == 0) {
170                         if(LEFT < 2) {
171                                 if(SIZE_VIOLATION)
172                                         RETURN(RC_FAIL);
173                                 else
174                                         RETURN(RC_WMORE);
175                         } else if(((const uint8_t *)ptr)[1] == 0) {
176                                 /*
177                                  * Found the terminator of the
178                                  * indefinite length structure.
179                                  */
180                                 break;
181                         }
182                 }
183
184                 /* Outmost tag may be unknown and cannot be fetched/compared */
185                 if(elm->tag != (ber_tlv_tag_t)-1) {
186                     if(BER_TAGS_EQUAL(tlv_tag, elm->tag)) {
187                         /*
188                          * The new list member of expected type has arrived.
189                          */
190                     } else {
191                         ASN_DEBUG("Unexpected tag %s fixed SET OF %s",
192                                 ber_tlv_tag_string(tlv_tag), td->name);
193                         ASN_DEBUG("%s SET OF has tag %s",
194                                 td->name, ber_tlv_tag_string(elm->tag));
195                         RETURN(RC_FAIL);
196                     }
197                 }
198
199                 /*
200                  * MICROPHASE 2: Invoke the member-specific decoder.
201                  */
202                 ctx->step |= 1;         /* Confirm entering next microphase */
203         microphase2:
204                 
205                 /*
206                  * Invoke the member fetch routine according to member's type
207                  */
208                 rval = elm->type->ber_decoder(opt_codec_ctx,
209                                 elm->type, &ctx->ptr, ptr, LEFT, 0);
210                 ASN_DEBUG("In %s SET OF %s code %d consumed %d",
211                         td->name, elm->type->name,
212                         rval.code, (int)rval.consumed);
213                 switch(rval.code) {
214                 case RC_OK:
215                         {
216                                 asn_anonymous_set_ *list = _A_SET_FROM_VOID(st);
217                                 if(ASN_SET_ADD(list, ctx->ptr) != 0)
218                                         RETURN(RC_FAIL);
219                                 else
220                                         ctx->ptr = 0;
221                         }
222                         break;
223                 case RC_WMORE: /* More data expected */
224                         if(!SIZE_VIOLATION) {
225                                 ADVANCE(rval.consumed);
226                                 RETURN(RC_WMORE);
227                         }
228                         /* Fall through */
229                 case RC_FAIL: /* Fatal error */
230                         RETURN(RC_FAIL);
231                 } /* switch(rval) */
232                 
233                 ADVANCE(rval.consumed);
234           }     /* for(all list members) */
235
236                 NEXT_PHASE(ctx);
237         case 2:
238                 /*
239                  * Read in all "end of content" TLVs.
240                  */
241                 while(ctx->left < 0) {
242                         if(LEFT < 2) {
243                                 if(LEFT > 0 && ((const char *)ptr)[0] != 0) {
244                                         /* Unexpected tag */
245                                         RETURN(RC_FAIL);
246                                 } else {
247                                         RETURN(RC_WMORE);
248                                 }
249                         }
250                         if(((const char *)ptr)[0] == 0
251                         && ((const char *)ptr)[1] == 0) {
252                                 ADVANCE(2);
253                                 ctx->left++;
254                         } else {
255                                 RETURN(RC_FAIL);
256                         }
257                 }
258
259                 PHASE_OUT(ctx);
260         }
261         
262         RETURN(RC_OK);
263 }
264
265 /*
266  * Internally visible buffer holding a single encoded element.
267  */
268 struct _el_buffer {
269         uint8_t *buf;
270         size_t length;
271         size_t size;
272 };
273 /* Append bytes to the above structure */
274 static int _el_addbytes(const void *buffer, size_t size, void *el_buf_ptr) {
275         struct _el_buffer *el_buf = (struct _el_buffer *)el_buf_ptr;
276
277         if(el_buf->length + size > el_buf->size)
278                 return -1;
279
280         memcpy(el_buf->buf + el_buf->length, buffer, size);
281
282         el_buf->length += size;
283         return 0;
284 }
285 static int _el_buf_cmp(const void *ap, const void *bp) {
286         const struct _el_buffer *a = (const struct _el_buffer *)ap;
287         const struct _el_buffer *b = (const struct _el_buffer *)bp;
288         int ret;
289         size_t common_len;
290
291         if(a->length < b->length)
292                 common_len = a->length;
293         else
294                 common_len = b->length;
295
296         ret = memcmp(a->buf, b->buf, common_len);
297         if(ret == 0) {
298                 if(a->length < b->length)
299                         ret = -1;
300                 else if(a->length > b->length)
301                         ret = 1;
302         }
303
304         return ret;
305 }
306
307 /*
308  * The DER encoder of the SET OF type.
309  */
310 asn_enc_rval_t
311 SET_OF_encode_der(asn_TYPE_descriptor_t *td, void *ptr,
312         int tag_mode, ber_tlv_tag_t tag,
313         asn_app_consume_bytes_f *cb, void *app_key) {
314         asn_TYPE_member_t *elm = td->elements;
315         asn_TYPE_descriptor_t *elm_type = elm->type;
316         der_type_encoder_f *der_encoder = elm_type->der_encoder;
317         asn_anonymous_set_ *list = _A_SET_FROM_VOID(ptr);
318         size_t computed_size = 0;
319         ssize_t encoding_size = 0;
320         struct _el_buffer *encoded_els;
321         ssize_t eels_count = 0;
322         size_t max_encoded_len = 1;
323         asn_enc_rval_t erval;
324         int ret;
325         int edx;
326
327         ASN_DEBUG("Estimating size for SET OF %s", td->name);
328
329         /*
330          * Gather the length of the underlying members sequence.
331          */
332         for(edx = 0; edx < list->count; edx++) {
333                 void *memb_ptr = list->array[edx];
334                 if(!memb_ptr) continue;
335                 erval = der_encoder(elm_type, memb_ptr, 0, elm->tag, 0, 0);
336                 if(erval.encoded == -1)
337                         return erval;
338                 computed_size += erval.encoded;
339
340                 /* Compute maximum encoding's size */
341                 if(max_encoded_len < (size_t)erval.encoded)
342                         max_encoded_len = erval.encoded;
343         }
344
345         /*
346          * Encode the TLV for the sequence itself.
347          */
348         encoding_size = der_write_tags(td, computed_size, tag_mode, 1, tag,
349                 cb, app_key);
350         if(encoding_size == -1) {
351                 erval.encoded = -1;
352                 erval.failed_type = td;
353                 erval.structure_ptr = ptr;
354                 return erval;
355         }
356         computed_size += encoding_size;
357
358         if(!cb || list->count == 0) {
359                 erval.encoded = computed_size;
360                 _ASN_ENCODED_OK(erval);
361         }
362
363         /*
364          * DER mandates dynamic sorting of the SET OF elements
365          * according to their encodings. Build an array of the
366          * encoded elements.
367          */
368         encoded_els = (struct _el_buffer *)MALLOC(
369                                 list->count * sizeof(encoded_els[0]));
370         if(encoded_els == NULL) {
371                 erval.encoded = -1;
372                 erval.failed_type = td;
373                 erval.structure_ptr = ptr;
374                 return erval;
375         }
376
377         ASN_DEBUG("Encoding members of %s SET OF", td->name);
378
379         /*
380          * Encode all members.
381          */
382         for(edx = 0; edx < list->count; edx++) {
383                 void *memb_ptr = list->array[edx];
384                 struct _el_buffer *encoded_el = &encoded_els[eels_count];
385
386                 if(!memb_ptr) continue;
387
388                 /*
389                  * Prepare space for encoding.
390                  */
391                 encoded_el->buf = (uint8_t *)MALLOC(max_encoded_len);
392                 if(encoded_el->buf) {
393                         encoded_el->length = 0;
394                         encoded_el->size = max_encoded_len;
395                 } else {
396                         for(edx--; edx >= 0; edx--)
397                                 FREEMEM(encoded_els[edx].buf);
398                         FREEMEM(encoded_els);
399                         erval.encoded = -1;
400                         erval.failed_type = td;
401                         erval.structure_ptr = ptr;
402                         return erval;
403                 }
404
405                 /*
406                  * Encode the member into the prepared space.
407                  */
408                 erval = der_encoder(elm_type, memb_ptr, 0, elm->tag,
409                         _el_addbytes, encoded_el);
410                 if(erval.encoded == -1) {
411                         for(; edx >= 0; edx--)
412                                 FREEMEM(encoded_els[edx].buf);
413                         FREEMEM(encoded_els);
414                         return erval;
415                 }
416                 encoding_size += erval.encoded;
417                 eels_count++;
418         }
419
420         /*
421          * Sort the encoded elements according to their encoding.
422          */
423         qsort(encoded_els, eels_count, sizeof(encoded_els[0]), _el_buf_cmp);
424
425         /*
426          * Report encoded elements to the application.
427          * Dispose of temporary sorted members table.
428          */
429         ret = 0;
430         for(edx = 0; edx < eels_count; edx++) {
431                 struct _el_buffer *encoded_el = &encoded_els[edx];
432                 /* Report encoded chunks to the application */
433                 if(ret == 0
434                 && cb(encoded_el->buf, encoded_el->length, app_key) < 0)
435                         ret = -1;
436                 FREEMEM(encoded_el->buf);
437         }
438         FREEMEM(encoded_els);
439
440         if(ret || computed_size != (size_t)encoding_size) {
441                 /*
442                  * Standard callback failed, or
443                  * encoded size is not equal to the computed size.
444                  */
445                 erval.encoded = -1;
446                 erval.failed_type = td;
447                 erval.structure_ptr = ptr;
448         } else {
449                 erval.encoded = computed_size;
450         }
451
452         _ASN_ENCODED_OK(erval);
453 }
454
455 #undef  XER_ADVANCE
456 #define XER_ADVANCE(num_bytes)  do {                    \
457                 size_t num = num_bytes;                 \
458                 buf_ptr = ((const char *)buf_ptr) + num;\
459                 size -= num;                            \
460                 consumed_myself += num;                 \
461         } while(0)
462
463 /*
464  * Decode the XER (XML) data.
465  */
466 asn_dec_rval_t
467 SET_OF_decode_xer(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
468         void **struct_ptr, const char *opt_mname,
469                 const void *buf_ptr, size_t size) {
470         /*
471          * Bring closer parts of structure description.
472          */
473         asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
474         asn_TYPE_member_t *element = td->elements;
475         const char *elm_tag;
476         const char *xml_tag = opt_mname ? opt_mname : td->xml_tag;
477
478         /*
479          * ... and parts of the structure being constructed.
480          */
481         void *st = *struct_ptr; /* Target structure. */
482         asn_struct_ctx_t *ctx;  /* Decoder context */
483
484         asn_dec_rval_t rval;            /* Return value from a decoder */
485         ssize_t consumed_myself = 0;    /* Consumed bytes from ptr */
486
487         /*
488          * Create the target structure if it is not present already.
489          */
490         if(st == 0) {
491                 st = *struct_ptr = CALLOC(1, specs->struct_size);
492                 if(st == 0) RETURN(RC_FAIL);
493         }
494
495         /* Which tag is expected for the downstream */
496         if(specs->as_XMLValueList) {
497                 elm_tag = (specs->as_XMLValueList == 1) ? 0 : "";
498         } else {
499                 elm_tag = (*element->name)
500                                 ? element->name : element->type->xml_tag;
501         }
502
503         /*
504          * Restore parsing context.
505          */
506         ctx = (asn_struct_ctx_t *)((char *)st + specs->ctx_offset);
507
508         /*
509          * Phases of XER/XML processing:
510          * Phase 0: Check that the opening tag matches our expectations.
511          * Phase 1: Processing body and reacting on closing tag.
512          * Phase 2: Processing inner type.
513          */
514         for(; ctx->phase <= 2;) {
515                 pxer_chunk_type_e ch_type;      /* XER chunk type */
516                 ssize_t ch_size;                /* Chunk size */
517                 xer_check_tag_e tcv;            /* Tag check value */
518
519                 /*
520                  * Go inside the inner member of a set.
521                  */
522                 if(ctx->phase == 2) {
523                         asn_dec_rval_t tmprval;
524
525                         /* Invoke the inner type decoder, m.b. multiple times */
526                         ASN_DEBUG("XER/SET OF element [%s]", elm_tag);
527                         tmprval = element->type->xer_decoder(opt_codec_ctx,
528                                         element->type, &ctx->ptr, elm_tag,
529                                         buf_ptr, size);
530                         if(tmprval.code == RC_OK) {
531                                 asn_anonymous_set_ *list = _A_SET_FROM_VOID(st);
532                                 if(ASN_SET_ADD(list, ctx->ptr) != 0)
533                                         RETURN(RC_FAIL);
534                                 ctx->ptr = 0;
535                                 XER_ADVANCE(tmprval.consumed);
536                         } else {
537                                 XER_ADVANCE(tmprval.consumed);
538                                 RETURN(tmprval.code);
539                         }
540                         ctx->phase = 1; /* Back to body processing */
541                         ASN_DEBUG("XER/SET OF phase => %d", ctx->phase);
542                         /* Fall through */
543                 }
544
545                 /*
546                  * Get the next part of the XML stream.
547                  */
548                 ch_size = xer_next_token(&ctx->context,
549                         buf_ptr, size, &ch_type);
550                 switch(ch_size) {
551                 case -1: RETURN(RC_FAIL);
552                 case 0:  RETURN(RC_WMORE);
553                 default:
554                         switch(ch_type) {
555                         case PXER_COMMENT:      /* Got XML comment */
556                         case PXER_TEXT:         /* Ignore free-standing text */
557                                 XER_ADVANCE(ch_size);   /* Skip silently */
558                                 continue;
559                         case PXER_TAG:
560                                 break;  /* Check the rest down there */
561                         }
562                 }
563
564                 tcv = xer_check_tag(buf_ptr, ch_size, xml_tag);
565                 ASN_DEBUG("XER/SET OF: tcv = %d, ph=%d t=%s",
566                         tcv, ctx->phase, xml_tag);
567                 switch(tcv) {
568                 case XCT_CLOSING:
569                         if(ctx->phase == 0) break;
570                         ctx->phase = 0;
571                         /* Fall through */
572                 case XCT_BOTH:
573                         if(ctx->phase == 0) {
574                                 /* No more things to decode */
575                                 XER_ADVANCE(ch_size);
576                                 ctx->phase = 3; /* Phase out */
577                                 RETURN(RC_OK);
578                         }
579                         /* Fall through */
580                 case XCT_OPENING:
581                         if(ctx->phase == 0) {
582                                 XER_ADVANCE(ch_size);
583                                 ctx->phase = 1; /* Processing body phase */
584                                 continue;
585                         }
586                         /* Fall through */
587                 case XCT_UNKNOWN_OP:
588                 case XCT_UNKNOWN_BO:
589
590                         ASN_DEBUG("XER/SET OF: tcv=%d, ph=%d", tcv, ctx->phase);
591                         if(ctx->phase == 1) {
592                                 /*
593                                  * Process a single possible member.
594                                  */
595                                 ctx->phase = 2;
596                                 continue;
597                         }
598                         /* Fall through */
599                 default:
600                         break;
601                 }
602
603                 ASN_DEBUG("Unexpected XML tag in SET OF");
604                 break;
605         }
606
607         ctx->phase = 3; /* "Phase out" on hard failure */
608         RETURN(RC_FAIL);
609 }
610
611
612
613 typedef struct xer_tmp_enc_s {
614         void *buffer;
615         size_t offset;
616         size_t size;
617 } xer_tmp_enc_t;
618 static int
619 SET_OF_encode_xer_callback(const void *buffer, size_t size, void *key) {
620         xer_tmp_enc_t *t = (xer_tmp_enc_t *)key;
621         if(t->offset + size >= t->size) {
622                 size_t newsize = (t->size << 2) + size;
623                 void *p = REALLOC(t->buffer, newsize);
624                 if(!p) return -1;
625                 t->buffer = p;
626                 t->size = newsize;
627         }
628         memcpy((char *)t->buffer + t->offset, buffer, size);
629         t->offset += size;
630         return 0;
631 }
632 static int
633 SET_OF_xer_order(const void *aptr, const void *bptr) {
634         const xer_tmp_enc_t *a = (const xer_tmp_enc_t *)aptr;
635         const xer_tmp_enc_t *b = (const xer_tmp_enc_t *)bptr;
636         size_t minlen = a->offset;
637         int ret;
638         if(b->offset < minlen) minlen = b->offset;
639         /* Well-formed UTF-8 has this nice lexicographical property... */
640         ret = memcmp(a->buffer, b->buffer, minlen);
641         if(ret != 0) return ret;
642         if(a->offset == b->offset)
643                 return 0;
644         if(a->offset == minlen)
645                 return -1;
646         return 1;
647 }
648
649
650 asn_enc_rval_t
651 SET_OF_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
652         int ilevel, enum xer_encoder_flags_e flags,
653                 asn_app_consume_bytes_f *cb, void *app_key) {
654         asn_enc_rval_t er;
655         asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
656         asn_TYPE_member_t *elm = td->elements;
657         asn_anonymous_set_ *list = _A_SET_FROM_VOID(sptr);
658         const char *mname = specs->as_XMLValueList
659                 ? 0 : ((*elm->name) ? elm->name : elm->type->xml_tag);
660         size_t mlen = mname ? strlen(mname) : 0;
661         int xcan = (flags & XER_F_CANONICAL);
662         xer_tmp_enc_t *encs = 0;
663         size_t encs_count = 0;
664         void *original_app_key = app_key;
665         asn_app_consume_bytes_f *original_cb = cb;
666         int i;
667
668         if(!sptr) _ASN_ENCODE_FAILED;
669
670         if(xcan) {
671                 encs = (xer_tmp_enc_t *)MALLOC(list->count * sizeof(encs[0]));
672                 if(!encs) _ASN_ENCODE_FAILED;
673                 cb = SET_OF_encode_xer_callback;
674         }
675
676         er.encoded = 0;
677
678         for(i = 0; i < list->count; i++) {
679                 asn_enc_rval_t tmper;
680
681                 void *memb_ptr = list->array[i];
682                 if(!memb_ptr) continue;
683
684                 if(encs) {
685                         memset(&encs[encs_count], 0, sizeof(encs[0]));
686                         app_key = &encs[encs_count];
687                         encs_count++;
688                 }
689
690                 if(mname) {
691                         if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel);
692                         _ASN_CALLBACK3("<", 1, mname, mlen, ">", 1);
693                 }
694
695                 if(!xcan && specs->as_XMLValueList == 1)
696                         _i_ASN_TEXT_INDENT(1, ilevel + 1);
697                 tmper = elm->type->xer_encoder(elm->type, memb_ptr,
698                                 ilevel + (specs->as_XMLValueList != 2),
699                                 flags, cb, app_key);
700                 if(tmper.encoded == -1) {
701                         td = tmper.failed_type;
702                         sptr = tmper.structure_ptr;
703                         goto cb_failed;
704                 }
705                 if(tmper.encoded == 0 && specs->as_XMLValueList) {
706                         const char *name = elm->type->xml_tag;
707                         size_t len = strlen(name);
708                         _ASN_CALLBACK3("<", 1, name, len, "/>", 2);
709                 }
710
711                 if(mname) {
712                         _ASN_CALLBACK3("</", 2, mname, mlen, ">", 1);
713                         er.encoded += 5;
714                 }
715
716                 er.encoded += (2 * mlen) + tmper.encoded;
717         }
718
719         if(!xcan) _i_ASN_TEXT_INDENT(1, ilevel - 1);
720
721         if(encs) {
722                 xer_tmp_enc_t *enc = encs;
723                 xer_tmp_enc_t *end = encs + encs_count;
724                 ssize_t control_size = 0;
725
726                 cb = original_cb;
727                 app_key = original_app_key;
728                 qsort(encs, encs_count, sizeof(encs[0]), SET_OF_xer_order);
729
730                 for(; enc < end; enc++) {
731                         _ASN_CALLBACK(enc->buffer, enc->offset);
732                         FREEMEM(enc->buffer);
733                         enc->buffer = 0;
734                         control_size += enc->offset;
735                 }
736                 assert(control_size == er.encoded);
737         }
738
739         goto cleanup;
740 cb_failed:
741         er.encoded = -1;
742         er.failed_type = td;
743         er.structure_ptr = sptr;
744 cleanup:
745         if(encs) {
746                 while(encs_count-- > 0) {
747                         if(encs[encs_count].buffer)
748                                 FREEMEM(encs[encs_count].buffer);
749                 }
750                 FREEMEM(encs);
751         }
752         _ASN_ENCODED_OK(er);
753 }
754
755 int
756 SET_OF_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
757                 asn_app_consume_bytes_f *cb, void *app_key) {
758         asn_TYPE_member_t *elm = td->elements;
759         const asn_anonymous_set_ *list = _A_CSET_FROM_VOID(sptr);
760         int ret;
761         int i;
762
763         if(!sptr) return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
764
765         /* Dump preamble */
766         if(cb(td->name, strlen(td->name), app_key) < 0
767         || cb(" ::= {", 6, app_key) < 0)
768                 return -1;
769
770         for(i = 0; i < list->count; i++) {
771                 const void *memb_ptr = list->array[i];
772                 if(!memb_ptr) continue;
773
774                 _i_INDENT(1);
775
776                 ret = elm->type->print_struct(elm->type, memb_ptr,
777                         ilevel + 1, cb, app_key);
778                 if(ret) return ret;
779         }
780
781         ilevel--;
782         _i_INDENT(1);
783
784         return (cb("}", 1, app_key) < 0) ? -1 : 0;
785 }
786
787 void
788 SET_OF_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) {
789         if(td && ptr) {
790                 asn_TYPE_member_t *elm = td->elements;
791                 asn_anonymous_set_ *list = _A_SET_FROM_VOID(ptr);
792                 int i;
793
794                 /*
795                  * Could not use set_of_empty() because of (*free)
796                  * incompatibility.
797                  */
798                 for(i = 0; i < list->count; i++) {
799                         void *memb_ptr = list->array[i];
800                         if(memb_ptr)
801                         ASN_STRUCT_FREE(*elm->type, memb_ptr);
802                 }
803                 list->count = 0;        /* No meaningful elements left */
804
805                 asn_set_empty(list);    /* Remove (list->array) */
806
807                 if(!contents_only) {
808                         FREEMEM(ptr);
809                 }
810         }
811 }
812
813 int
814 SET_OF_constraint(asn_TYPE_descriptor_t *td, const void *sptr,
815                 asn_app_constraint_failed_f *ctfailcb, void *app_key) {
816         asn_TYPE_member_t *elm = td->elements;
817         asn_constr_check_f *constr;
818         const asn_anonymous_set_ *list = _A_CSET_FROM_VOID(sptr);
819         int i;
820
821         if(!sptr) {
822                 _ASN_CTFAIL(app_key, td,
823                         "%s: value not given (%s:%d)",
824                         td->name, __FILE__, __LINE__);
825                 return -1;
826         }
827
828         constr = elm->memb_constraints;
829         if(!constr) constr = elm->type->check_constraints;
830
831         /*
832          * Iterate over the members of an array.
833          * Validate each in turn, until one fails.
834          */
835         for(i = 0; i < list->count; i++) {
836                 const void *memb_ptr = list->array[i];
837                 int ret;
838
839                 if(!memb_ptr) continue;
840
841                 ret = constr(elm->type, memb_ptr, ctfailcb, app_key);
842                 if(ret) return ret;
843         }
844
845         /*
846          * Cannot inherit it eralier:
847          * need to make sure we get the updated version.
848          */
849         if(!elm->memb_constraints)
850                 elm->memb_constraints = elm->type->check_constraints;
851
852         return 0;
853 }
854
855 asn_dec_rval_t
856 SET_OF_decode_uper(asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
857         asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
858         asn_dec_rval_t rv;
859         asn_SET_OF_specifics_t *specs = (asn_SET_OF_specifics_t *)td->specifics;
860         asn_TYPE_member_t *elm = td->elements;  /* Single one */
861         void *st = *sptr;
862         asn_anonymous_set_ *list;
863         asn_per_constraint_t *ct;
864         int repeat = 0;
865         ssize_t nelems;
866
867         if(_ASN_STACK_OVERFLOW_CHECK(opt_codec_ctx))
868                 _ASN_DECODE_FAILED;
869
870         /*
871          * Create the target structure if it is not present already.
872          */
873         if(!st) {
874                 st = *sptr = CALLOC(1, specs->struct_size);
875                 if(!st) _ASN_DECODE_FAILED;
876         }                                                                       
877         list = _A_SET_FROM_VOID(st);
878
879         /* Figure out which constraints to use */
880         if(constraints) ct = &constraints->size;
881         else if(td->per_constraints) ct = &td->per_constraints->size;
882         else ct = 0;
883
884         if(ct && ct->flags & APC_EXTENSIBLE) {
885                 int value = per_get_few_bits(pd, 1);
886                 if(value < 0) _ASN_DECODE_STARVED;
887                 if(value) ct = 0;       /* Not restricted! */
888         }
889
890         if(ct && ct->effective_bits >= 0) {
891                 /* X.691, #19.5: No length determinant */
892                 nelems = per_get_few_bits(pd, ct->effective_bits);
893                 ASN_DEBUG("Preparing to fetch %ld+%ld elements from %s",
894                         (long)nelems, ct->lower_bound, td->name);
895                 if(nelems < 0)  _ASN_DECODE_STARVED;
896                 nelems += ct->lower_bound;
897         } else {
898                 nelems = -1;
899         }
900
901         do {
902                 int i;
903                 if(nelems < 0) {
904                         nelems = uper_get_length(pd,
905                                 ct ? ct->effective_bits : -1, &repeat);
906                         ASN_DEBUG("Got to decode %d elements (eff %d)",
907                                 (int)nelems, ct ? ct->effective_bits : -1);
908                         if(nelems < 0) _ASN_DECODE_STARVED;
909                 }
910
911                 for(i = 0; i < nelems; i++) {
912                         void *ptr = 0;
913                         ASN_DEBUG("SET OF %s decoding", elm->type->name);
914                         rv = elm->type->uper_decoder(opt_codec_ctx, elm->type,
915                                 elm->per_constraints, &ptr, pd);
916                         ASN_DEBUG("%s SET OF %s decoded %d, %p",
917                                 td->name, elm->type->name, rv.code, ptr);
918                         if(rv.code == RC_OK) {
919                                 if(ASN_SET_ADD(list, ptr) == 0)
920                                         continue;
921                                 ASN_DEBUG("Failed to add element into %s",
922                                         td->name);
923                                 /* Fall through */
924                                 rv.code = RC_FAIL;
925                         } else {
926                                 ASN_DEBUG("Failed decoding %s of %s (SET OF)",
927                                         elm->type->name, td->name);
928                         }
929                         if(ptr) ASN_STRUCT_FREE(*elm->type, ptr);
930                         return rv;
931                 }
932
933                 nelems = -1;    /* Allow uper_get_length() */
934         } while(repeat);
935
936         ASN_DEBUG("Decoded %s as SET OF", td->name);
937
938         rv.code = RC_OK;
939         rv.consumed = 0;
940         return rv;
941 }
942