--- /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_SEQUENCE.h>
+#include <OPEN_TYPE.h>
+
+/*
+ * Return a standardized complex structure.
+ */
+#undef RETURN
+#define RETURN(_code) \
+ do { \
+ rval.code = _code; \
+ rval.consumed = consumed_myself; \
+ return rval; \
+ } while(0)
+
+/*
+ * Check whether we are inside the extensions group.
+ */
+#define IN_EXTENSION_GROUP(specs, memb_idx) \
+ ((specs)->first_extension >= 0 \
+ && (unsigned)(specs)->first_extension <= (memb_idx))
+
+#undef XER_ADVANCE
+#define XER_ADVANCE(num_bytes) \
+ do { \
+ size_t num = (num_bytes); \
+ ptr = ((const char *)ptr) + num; \
+ size -= num; \
+ consumed_myself += num; \
+ } while(0)
+
+/*
+ * Decode the XER (XML) data.
+ */
+asn_dec_rval_t
+SEQUENCE_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 *ptr, size_t size) {
+ /*
+ * Bring closer parts of structure description.
+ */
+ const asn_SEQUENCE_specifics_t *specs
+ = (const asn_SEQUENCE_specifics_t *)td->specifics;
+ asn_TYPE_member_t *elements = td->elements;
+ 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 */
+ 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);
+
+
+ /*
+ * 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: Skipping unknown extensions.
+ * Phase 4: PHASED OUT
+ */
+ for(edx = ctx->step; ctx->phase <= 3;) {
+ 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 inner member of a sequence.
+ */
+ if(ctx->phase == 2) {
+ asn_dec_rval_t tmprval;
+ void *memb_ptr_dontuse; /* Pointer to the member */
+ void **memb_ptr2; /* Pointer to that pointer */
+
+ 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_dontuse = (char *)st + elm->memb_offset;
+ memb_ptr2 = &memb_ptr_dontuse; /* Only use of memb_ptr_dontuse */
+ }
+
+ if(elm->flags & ATF_OPEN_TYPE) {
+ tmprval = OPEN_TYPE_xer_get(opt_codec_ctx, td, st, elm, ptr, size);
+ } else {
+ /* Invoke the inner type decoder, m.b. multiple times */
+ tmprval = elm->type->op->xer_decoder(opt_codec_ctx,
+ elm->type, memb_ptr2, elm->name,
+ ptr, size);
+ }
+ XER_ADVANCE(tmprval.consumed);
+ if(tmprval.code != RC_OK)
+ RETURN(tmprval.code);
+ ctx->phase = 1; /* Back to body processing */
+ ctx->step = ++edx;
+ ASN_DEBUG("XER/SEQUENCE phase => %d, step => %d",
+ ctx->phase, ctx->step);
+ /* Fall through */
+ }
+
+ /*
+ * Get the next part of the XML stream.
+ */
+ ch_size = xer_next_token(&ctx->context, 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(ptr, ch_size, xml_tag);
+ ASN_DEBUG("XER/SEQUENCE: tcv = %d, ph=%d [%s]",
+ tcv, ctx->phase, xml_tag);
+
+ /* Skip the extensions section */
+ if(ctx->phase == 3) {
+ switch(xer_skip_unknown(tcv, &ctx->left)) {
+ case -1:
+ ctx->phase = 4;
+ RETURN(RC_FAIL);
+ case 0:
+ XER_ADVANCE(ch_size);
+ continue;
+ case 1:
+ XER_ADVANCE(ch_size);
+ ctx->phase = 1;
+ continue;
+ case 2:
+ ctx->phase = 1;
+ break;
+ }
+ }
+
+ switch(tcv) {
+ case XCT_CLOSING:
+ if(ctx->phase == 0) break;
+ ctx->phase = 0;
+ /* Fall through */
+ case XCT_BOTH:
+ if(ctx->phase == 0) {
+ if(edx >= td->elements_count ||
+ /* Explicit OPTIONAL specs reaches the end */
+ (edx + elements[edx].optional == td->elements_count) ||
+ /* All extensions are optional */
+ IN_EXTENSION_GROUP(specs, edx)) {
+ XER_ADVANCE(ch_size);
+ ctx->phase = 4; /* Phase out */
+ RETURN(RC_OK);
+ } else {
+ ASN_DEBUG("Premature end of XER SEQUENCE");
+ RETURN(RC_FAIL);
+ }
+ }
+ /* 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/SEQUENCE: tcv=%d, ph=%d, edx=%" ASN_PRI_SIZE "",
+ tcv, ctx->phase, edx);
+ if(ctx->phase != 1) {
+ break; /* Really unexpected */
+ }
+
+ if(edx < td->elements_count) {
+ /*
+ * Search which member corresponds to this tag.
+ */
+ size_t n;
+ size_t edx_end = edx + elements[edx].optional + 1;
+ if(edx_end > td->elements_count)
+ edx_end = td->elements_count;
+ for(n = edx; n < edx_end; n++) {
+ elm = &td->elements[n];
+ tcv = xer_check_tag(ptr, ch_size, elm->name);
+ switch(tcv) {
+ case XCT_BOTH:
+ case XCT_OPENING:
+ /*
+ * Process this member.
+ */
+ ctx->step = edx = n;
+ ctx->phase = 2;
+ break;
+ case XCT_UNKNOWN_OP:
+ case XCT_UNKNOWN_BO:
+ continue;
+ default:
+ n = edx_end;
+ break; /* Phase out */
+ }
+ break;
+ }
+ if(n != edx_end)
+ continue;
+ } else {
+ ASN_DEBUG("Out of defined members: %" ASN_PRI_SIZE "/%u",
+ edx, td->elements_count);
+ }
+
+ /* It is expected extension */
+ if(IN_EXTENSION_GROUP(specs,
+ edx + (edx < td->elements_count
+ ? elements[edx].optional : 0))) {
+ ASN_DEBUG("Got anticipated extension at %" ASN_PRI_SIZE "",
+ edx);
+ /*
+ * 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 */
+ } else {
+ ctx->left = 1;
+ ctx->phase = 3; /* Skip ...'s */
+ }
+ XER_ADVANCE(ch_size);
+ continue;
+ }
+
+ /* Fall through */
+ default:
+ break;
+ }
+
+ ASN_DEBUG("Unexpected XML tag in SEQUENCE [%c%c%c%c%c%c]",
+ size>0?((const char *)ptr)[0]:'.',
+ size>1?((const char *)ptr)[1]:'.',
+ size>2?((const char *)ptr)[2]:'.',
+ size>3?((const char *)ptr)[3]:'.',
+ size>4?((const char *)ptr)[4]:'.',
+ size>5?((const char *)ptr)[5]:'.');
+ break;
+ }
+
+ ctx->phase = 4; /* "Phase out" on hard failure */
+ RETURN(RC_FAIL);
+}
+
+asn_enc_rval_t
+SEQUENCE_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 = {0,0,0};
+ int xcan = (flags & XER_F_CANONICAL);
+ asn_TYPE_descriptor_t *tmp_def_val_td = 0;
+ void *tmp_def_val = 0;
+ size_t edx;
+
+ if(!sptr) ASN__ENCODE_FAILED;
+
+ er.encoded = 0;
+
+ for(edx = 0; edx < td->elements_count; edx++) {
+ asn_enc_rval_t tmper = {0,0,0};
+ asn_TYPE_member_t *elm = &td->elements[edx];
+ const void *memb_ptr;
+ 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) {
+ assert(tmp_def_val == 0);
+ if(elm->default_value_set) {
+ if(elm->default_value_set(&tmp_def_val)) {
+ ASN__ENCODE_FAILED;
+ } else {
+ memb_ptr = tmp_def_val;
+ tmp_def_val_td = elm->type;
+ }
+ } else if(elm->optional) {
+ continue;
+ } else {
+ /* Mandatory element is missing */
+ ASN__ENCODE_FAILED;
+ }
+ }
+ } else {
+ memb_ptr = (const void *)((const char *)sptr + elm->memb_offset);
+ }
+
+ if(!xcan) ASN__TEXT_INDENT(1, ilevel);
+ ASN__CALLBACK3("<", 1, mname, mlen, ">", 1);
+
+ /* Print the member itself */
+ tmper = elm->type->op->xer_encoder(elm->type, memb_ptr, ilevel + 1,
+ flags, cb, app_key);
+ if(tmp_def_val) {
+ ASN_STRUCT_FREE(*tmp_def_val_td, tmp_def_val);
+ tmp_def_val = 0;
+ }
+ if(tmper.encoded == -1) return tmper;
+ er.encoded += tmper.encoded;
+
+ ASN__CALLBACK3("</", 2, mname, mlen, ">", 1);
+ }
+
+ if(!xcan) ASN__TEXT_INDENT(1, ilevel - 1);
+
+ ASN__ENCODED_OK(er);
+cb_failed:
+ if(tmp_def_val) ASN_STRUCT_FREE(*tmp_def_val_td, tmp_def_val);
+ ASN__ENCODE_FAILED;
+}
Code Review / sim / e2-interface.git / blobdiff