add XER equivalence check
diff --git a/skeletons/xer_encoder.c b/skeletons/xer_encoder.c
index 4606575..e52ee15 100644
--- a/skeletons/xer_encoder.c
+++ b/skeletons/xer_encoder.c
@@ -65,3 +65,169 @@
return fflush(stream);
}
+
+struct xer_buffer {
+ char *buffer;
+ size_t buffer_size;
+ size_t allocated_size;
+};
+
+static int
+xer__buffer_append(const void *buffer, size_t size, void *app_key) {
+ struct xer_buffer *xb = app_key;
+
+ while(xb->buffer_size + size + 1 > xb->allocated_size) {
+ size_t new_size = 2 * (xb->allocated_size ? xb->allocated_size : 64);
+ char *new_buf = MALLOC(new_size);
+ if(!new_buf) return -1;
+ memcpy(new_buf, xb->buffer, xb->buffer_size);
+ FREEMEM(xb->buffer);
+ xb->buffer = new_buf;
+ xb->allocated_size = new_size;
+ }
+
+ memcpy(xb->buffer + xb->buffer_size, buffer, size);
+ xb->buffer_size += size;
+ xb->buffer[xb->buffer_size] = '\0';
+ return 0;
+}
+
+enum xer_equivalence_e
+xer_equivalent(struct asn_TYPE_descriptor_s *td, void *struct1,
+ void *struct2, FILE *opt_debug_stream) {
+ struct xer_buffer xb1 = {0, 0, 0};
+ struct xer_buffer xb2 = {0, 0, 0};
+ asn_enc_rval_t e1, e2;
+ asn_dec_rval_t rval;
+ void *sptr = NULL;
+
+ if(!td || !struct1 || !struct2) {
+ if(opt_debug_stream) {
+ if(!td) fprintf(opt_debug_stream, "Type descriptor missing\n");
+ if(!struct1) fprintf(opt_debug_stream, "Structure 1 missing\n");
+ if(!struct2) fprintf(opt_debug_stream, "Structure 2 missing\n");
+ }
+ return XEQ_FAILURE;
+ }
+
+ e1 = xer_encode(td, struct1, XER_F_BASIC, xer__buffer_append, &xb1);
+ if(e1.encoded == -1) {
+ if(opt_debug_stream) {
+ fprintf(stderr, "XER Encoding of %s failed\n", td->name);
+ }
+ FREEMEM(xb1.buffer);
+ return XEQ_ENCODE1_FAILED;
+ }
+
+ e2 = xer_encode(td, struct2, XER_F_BASIC, xer__buffer_append, &xb2);
+ if(e2.encoded == -1) {
+ if(opt_debug_stream) {
+ fprintf(stderr, "XER Encoding of %s failed\n", td->name);
+ }
+ FREEMEM(xb1.buffer);
+ FREEMEM(xb2.buffer);
+ return XEQ_ENCODE1_FAILED;
+ }
+
+ if(xb1.buffer_size != xb2.buffer_size
+ || memcmp(xb1.buffer, xb2.buffer, xb1.buffer_size) != 0) {
+ if(opt_debug_stream) {
+ fprintf(opt_debug_stream,
+ "Structures XER-encoded into different byte streams:\n=== "
+ "Structure 1 ===\n%s\n=== Structure 2 ===\n%s\n",
+ xb1.buffer, xb2.buffer);
+ }
+ FREEMEM(xb1.buffer);
+ FREEMEM(xb2.buffer);
+ return XEQ_DIFFERENT;
+ } else {
+ if(opt_debug_stream) {
+ fprintf(opt_debug_stream,
+ "Both structures encoded into the same XER byte stream "
+ "of size %zu:\n%s",
+ xb1.buffer_size, xb1.buffer);
+ }
+ }
+
+ rval = xer_decode(NULL, td, (void **)&sptr, xb1.buffer,
+ xb1.buffer_size);
+ switch(rval.code) {
+ case RC_OK:
+ break;
+ case RC_WMORE:
+ if(opt_debug_stream) {
+ fprintf(opt_debug_stream,
+ "Structure %s XER decode unexpectedly requires "
+ "more data:\n%s\n",
+ td->name, xb1.buffer);
+ }
+ /* Fall through */
+ case RC_FAIL:
+ default:
+ if(opt_debug_stream) {
+ fprintf(opt_debug_stream,
+ "Structure %s XER decoding resulted in failure.\n",
+ td->name);
+ }
+ ASN_STRUCT_FREE(*td, sptr);
+ FREEMEM(xb1.buffer);
+ FREEMEM(xb2.buffer);
+ return XEQ_DECODE_FAILED;
+ }
+
+ if(rval.consumed != xb1.buffer_size
+ && ((rval.consumed > xb1.buffer_size)
+ || xer_whitespace_span(xb1.buffer + rval.consumed,
+ xb1.buffer_size - rval.consumed)
+ != (xb1.buffer_size - rval.consumed))) {
+ if(opt_debug_stream) {
+ fprintf(opt_debug_stream,
+ "Round-trip decode of %s required less bytes (%zu) than "
+ "encoded (%zu)\n",
+ td->name, rval.consumed, xb1.buffer_size);
+ }
+ ASN_STRUCT_FREE(*td, sptr);
+ FREEMEM(xb1.buffer);
+ FREEMEM(xb2.buffer);
+ return XEQ_ROUND_TRIP_FAILED;
+ }
+
+ /*
+ * Reuse xb2 to encode newly decoded structure.
+ */
+ FREEMEM(xb2.buffer);
+ memset(&xb2, 0, sizeof(xb2));
+
+ e2 = xer_encode(td, sptr, XER_F_BASIC, xer__buffer_append, &xb2);
+ if(e2.encoded == -1) {
+ if(opt_debug_stream) {
+ fprintf(stderr, "XER Encoding of round-trip decode of %s failed\n",
+ td->name);
+ }
+ ASN_STRUCT_FREE(*td, sptr);
+ FREEMEM(xb1.buffer);
+ FREEMEM(xb2.buffer);
+ return XEQ_ROUND_TRIP_FAILED;
+ }
+
+ ASN_STRUCT_FREE(*td, sptr);
+ sptr = 0;
+
+ if(xb1.buffer_size != xb2.buffer_size
+ || memcmp(xb1.buffer, xb2.buffer, xb1.buffer_size) != 0) {
+ if(opt_debug_stream) {
+ fprintf(opt_debug_stream,
+ "XER Encoding of round-trip decode of %s resulted in "
+ "different byte stream:\n"
+ "=== Original ===\n%s\n"
+ "=== Round-tripped ===\n%s\n",
+ xb1.buffer, xb2.buffer, td->name);
+ }
+ FREEMEM(xb1.buffer);
+ FREEMEM(xb2.buffer);
+ return XEQ_ROUND_TRIP_FAILED;
+ }
+
+ return XEQ_SUCCESS;
+}
+