--- /dev/null
+/*
+ * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
+ * All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#include <asn_internal.h>
+#include <constr_CHOICE.h>
+
+/*
+ * Return a standardized complex structure.
+ */
+#undef RETURN
+#define RETURN(_code) \
+ do { \
+ rval.code = _code; \
+ rval.consumed = consumed_myself; \
+ return rval; \
+ } while(0)
+
+#undef XER_ADVANCE
+#define XER_ADVANCE(num_bytes) \
+ do { \
+ size_t num = num_bytes; \
+ buf_ptr = (const void *)(((const char *)buf_ptr) + num); \
+ size -= num; \
+ consumed_myself += num; \
+ } while(0)
+
+/*
+ * Decode the XER (XML) data.
+ */
+asn_dec_rval_t
+CHOICE_decode_xer(const asn_codec_ctx_t *opt_codec_ctx,
+ const 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.
+ */
+ const asn_CHOICE_specifics_t *specs = (const asn_CHOICE_specifics_t *)td->specifics;
+ const char *xml_tag = opt_mname ? opt_mname : td->xml_tag;
+
+ /*
+ * 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 of a decoder */
+ ssize_t consumed_myself = 0; /* Consumed bytes from ptr */
+ size_t edx; /* Element index */
+
+ /*
+ * 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);
+ if(ctx->phase == 0 && !*xml_tag)
+ ctx->phase = 1; /* Skip the outer tag checking phase */
+
+ /*
+ * 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.
+ * Phase 3: Only waiting for closing tag.
+ * Phase 4: Skipping unknown extensions.
+ * Phase 5: PHASED OUT
+ */
+ for(edx = ctx->step; ctx->phase <= 4;) {
+ pxer_chunk_type_e ch_type; /* XER chunk type */
+ ssize_t ch_size; /* Chunk size */
+ xer_check_tag_e tcv; /* Tag check value */
+ asn_TYPE_member_t *elm;
+
+ /*
+ * Go inside the member.
+ */
+ if(ctx->phase == 2) {
+ asn_dec_rval_t tmprval;
+ void *memb_ptr; /* Pointer to the member */
+ void **memb_ptr2; /* Pointer to that pointer */
+ unsigned old_present;
+
+ elm = &td->elements[edx];
+
+ 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;
+ }
+
+ /* Start/Continue decoding the inner member */
+ tmprval = elm->type->op->xer_decoder(opt_codec_ctx,
+ elm->type, memb_ptr2,
+ elm->name,
+ buf_ptr, size);
+ XER_ADVANCE(tmprval.consumed);
+ ASN_DEBUG("XER/CHOICE: itdf: [%s] code=%d",
+ elm->type->name, tmprval.code);
+ old_present = _fetch_present_idx(st,
+ specs->pres_offset,
+ specs->pres_size);
+ assert(old_present == 0 || old_present == edx + 1);
+ /* Record what we've got */
+ _set_present_idx(st,
+ specs->pres_offset,
+ specs->pres_size, edx + 1);
+ if(tmprval.code != RC_OK)
+ RETURN(tmprval.code);
+ ctx->phase = 3;
+ /* Fall through */
+ }
+
+ /* No need to wait for closing tag; special mode. */
+ if(ctx->phase == 3 && !*xml_tag) {
+ ctx->phase = 5; /* Phase out */
+ RETURN(RC_OK);
+ }
+
+ /*
+ * Get the next part of the XML stream.
+ */
+ ch_size = xer_next_token(&ctx->context, buf_ptr, size, &ch_type);
+ if(ch_size == -1) {
+ RETURN(RC_FAIL);
+ } else {
+ switch(ch_type) {
+ case PXER_WMORE:
+ RETURN(RC_WMORE);
+ 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/CHOICE checked [%c%c%c%c] vs [%s], tcv=%d",
+ ch_size>0?((const uint8_t *)buf_ptr)[0]:'?',
+ ch_size>1?((const uint8_t *)buf_ptr)[1]:'?',
+ ch_size>2?((const uint8_t *)buf_ptr)[2]:'?',
+ ch_size>3?((const uint8_t *)buf_ptr)[3]:'?',
+ xml_tag, tcv);
+
+ /* Skip the extensions section */
+ if(ctx->phase == 4) {
+ ASN_DEBUG("skip_unknown(%d, %ld)",
+ tcv, (long)ctx->left);
+ switch(xer_skip_unknown(tcv, &ctx->left)) {
+ case -1:
+ ctx->phase = 5;
+ RETURN(RC_FAIL);
+ case 1:
+ ctx->phase = 3;
+ /* Fall through */
+ case 0:
+ XER_ADVANCE(ch_size);
+ continue;
+ case 2:
+ ctx->phase = 3;
+ break;
+ }
+ }
+
+ switch(tcv) {
+ case XCT_BOTH:
+ break; /* No CHOICE? */
+ case XCT_CLOSING:
+ if(ctx->phase != 3)
+ break;
+ XER_ADVANCE(ch_size);
+ ctx->phase = 5; /* Phase out */
+ RETURN(RC_OK);
+ 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:
+
+ if(ctx->phase != 1)
+ break; /* Really unexpected */
+
+ /*
+ * Search which inner member corresponds to this tag.
+ */
+ for(edx = 0; edx < td->elements_count; edx++) {
+ elm = &td->elements[edx];
+ tcv = xer_check_tag(buf_ptr,ch_size,elm->name);
+ switch(tcv) {
+ case XCT_BOTH:
+ case XCT_OPENING:
+ /*
+ * Process this member.
+ */
+ ctx->step = edx;
+ ctx->phase = 2;
+ break;
+ case XCT_UNKNOWN_OP:
+ case XCT_UNKNOWN_BO:
+ continue;
+ default:
+ edx = td->elements_count;
+ break; /* Phase out */
+ }
+ break;
+ }
+ if(edx != td->elements_count)
+ continue;
+
+ /* It is expected extension */
+ if(specs->ext_start != -1) {
+ ASN_DEBUG("Got anticipated extension");
+ /*
+ * Check for (XCT_BOTH or XCT_UNKNOWN_BO)
+ * By using a mask. Only record a pure
+ * <opening> tags.
+ */
+ if(tcv & XCT_CLOSING) {
+ /* Found </extension> without body */
+ ctx->phase = 3; /* Terminating */
+ } else {
+ ctx->left = 1;
+ ctx->phase = 4; /* Skip ...'s */
+ }
+ XER_ADVANCE(ch_size);
+ continue;
+ }
+
+ /* Fall through */
+ default:
+ break;
+ }
+
+ ASN_DEBUG("Unexpected XML tag [%c%c%c%c] in CHOICE [%s]"
+ " (ph=%d, tag=%s)",
+ ch_size>0?((const uint8_t *)buf_ptr)[0]:'?',
+ ch_size>1?((const uint8_t *)buf_ptr)[1]:'?',
+ ch_size>2?((const uint8_t *)buf_ptr)[2]:'?',
+ ch_size>3?((const uint8_t *)buf_ptr)[3]:'?',
+ td->name, ctx->phase, xml_tag);
+ break;
+ }
+
+ ctx->phase = 5; /* Phase out, just in case */
+ RETURN(RC_FAIL);
+}
+
+asn_enc_rval_t
+CHOICE_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) {
+ const asn_CHOICE_specifics_t *specs =
+ (const asn_CHOICE_specifics_t *)td->specifics;
+ asn_enc_rval_t er = {0,0,0};
+ unsigned present = 0;
+
+ if(!sptr)
+ ASN__ENCODE_FAILED;
+
+ /*
+ * Figure out which CHOICE element is encoded.
+ */
+ present = _fetch_present_idx(sptr, specs->pres_offset,specs->pres_size);
+
+ if(present == 0 || present > td->elements_count) {
+ ASN__ENCODE_FAILED;
+ } else {
+ asn_enc_rval_t tmper = {0,0,0};
+ asn_TYPE_member_t *elm = &td->elements[present-1];
+ const void *memb_ptr = NULL;
+ const char *mname = elm->name;
+ unsigned int mlen = strlen(mname);
+
+ if(elm->flags & ATF_POINTER) {
+ memb_ptr =
+ *(const void *const *)((const char *)sptr + elm->memb_offset);
+ if(!memb_ptr) ASN__ENCODE_FAILED;
+ } else {
+ memb_ptr = (const void *)((const char *)sptr + elm->memb_offset);
+ }
+
+ er.encoded = 0;
+
+ if(!(flags & XER_F_CANONICAL)) ASN__TEXT_INDENT(1, ilevel);
+ ASN__CALLBACK3("<", 1, mname, mlen, ">", 1);
+
+ tmper = elm->type->op->xer_encoder(elm->type, memb_ptr,
+ ilevel + 1, flags, cb, app_key);
+ if(tmper.encoded == -1) return tmper;
+ er.encoded += tmper.encoded;
+
+ ASN__CALLBACK3("</", 2, mname, mlen, ">", 1);
+ }
+
+ if(!(flags & XER_F_CANONICAL)) ASN__TEXT_INDENT(1, ilevel - 1);
+
+ ASN__ENCODED_OK(er);
+cb_failed:
+ ASN__ENCODE_FAILED;
+}
Code Review / sim / e2-interface.git / blobdiff