3 * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
4 * Redistribution and modifications are permitted subject to BSD license.
6 #include <asn_internal.h>
11 * The XER encoder of any type. May be invoked by the application.
14 xer_encode(const asn_TYPE_descriptor_t *td, const void *sptr,
15 enum xer_encoder_flags_e xer_flags, asn_app_consume_bytes_f *cb,
17 asn_enc_rval_t er = {0, 0, 0};
21 int xcan = (xer_flags & XER_F_CANONICAL) ? 1 : 2;
23 if(!td || !sptr) goto cb_failed;
28 ASN__CALLBACK3("<", 1, mname, mlen, ">", 1);
30 tmper = td->op->xer_encoder(td, sptr, 1, xer_flags, cb, app_key);
31 if(tmper.encoded == -1) return tmper;
32 er.encoded += tmper.encoded;
34 ASN__CALLBACK3("</", 2, mname, mlen, ">\n", xcan);
42 * This is a helper function for xer_fprint, which directs all incoming data
43 * into the provided file descriptor.
46 xer__print2fp(const void *buffer, size_t size, void *app_key) {
47 FILE *stream = (FILE *)app_key;
49 if(fwrite(buffer, 1, size, stream) != size)
56 xer_fprint(FILE *stream, const asn_TYPE_descriptor_t *td, const void *sptr) {
57 asn_enc_rval_t er = {0,0,0};
59 if(!stream) stream = stdout;
63 er = xer_encode(td, sptr, XER_F_BASIC, xer__print2fp, stream);
67 return fflush(stream);
73 size_t allocated_size;
77 xer__buffer_append(const void *buffer, size_t size, void *app_key) {
78 struct xer_buffer *xb = app_key;
80 while(xb->buffer_size + size + 1 > xb->allocated_size) {
81 size_t new_size = 2 * (xb->allocated_size ? xb->allocated_size : 64);
82 char *new_buf = MALLOC(new_size);
83 if(!new_buf) return -1;
85 memcpy(new_buf, xb->buffer, xb->buffer_size);
89 xb->allocated_size = new_size;
92 memcpy(xb->buffer + xb->buffer_size, buffer, size);
93 xb->buffer_size += size;
94 xb->buffer[xb->buffer_size] = '\0';
98 enum xer_equivalence_e
99 xer_equivalent(const struct asn_TYPE_descriptor_s *td, const void *struct1,
100 const void *struct2, FILE *opt_debug_stream) {
101 struct xer_buffer xb1 = {0, 0, 0};
102 struct xer_buffer xb2 = {0, 0, 0};
103 asn_enc_rval_t e1, e2;
107 if(!td || !struct1 || !struct2) {
108 if(opt_debug_stream) {
109 if(!td) fprintf(opt_debug_stream, "Type descriptor missing\n");
110 if(!struct1) fprintf(opt_debug_stream, "Structure 1 missing\n");
111 if(!struct2) fprintf(opt_debug_stream, "Structure 2 missing\n");
116 e1 = xer_encode(td, struct1, XER_F_BASIC, xer__buffer_append, &xb1);
117 if(e1.encoded == -1) {
118 if(opt_debug_stream) {
119 fprintf(stderr, "XER Encoding of %s failed\n", td->name);
122 return XEQ_ENCODE1_FAILED;
125 e2 = xer_encode(td, struct2, XER_F_BASIC, xer__buffer_append, &xb2);
126 if(e2.encoded == -1) {
127 if(opt_debug_stream) {
128 fprintf(stderr, "XER Encoding of %s failed\n", td->name);
132 return XEQ_ENCODE1_FAILED;
135 if(xb1.buffer_size != xb2.buffer_size
136 || memcmp(xb1.buffer, xb2.buffer, xb1.buffer_size) != 0) {
137 if(opt_debug_stream) {
138 fprintf(opt_debug_stream,
139 "Structures XER-encoded into different byte streams:\n=== "
140 "Structure 1 ===\n%s\n=== Structure 2 ===\n%s\n",
141 xb1.buffer, xb2.buffer);
145 return XEQ_DIFFERENT;
147 if(opt_debug_stream) {
148 fprintf(opt_debug_stream,
149 "Both structures encoded into the same XER byte stream "
150 "of size %" ASN_PRI_SIZE ":\n%s",
151 xb1.buffer_size, xb1.buffer);
155 rval = xer_decode(NULL, td, (void **)&sptr, xb1.buffer,
161 if(opt_debug_stream) {
162 fprintf(opt_debug_stream,
163 "Structure %s XER decode unexpectedly requires "
165 td->name, xb1.buffer);
170 if(opt_debug_stream) {
171 fprintf(opt_debug_stream,
172 "Structure %s XER decoding resulted in failure.\n",
175 ASN_STRUCT_FREE(*td, sptr);
178 return XEQ_DECODE_FAILED;
181 if(rval.consumed != xb1.buffer_size
182 && ((rval.consumed > xb1.buffer_size)
183 || xer_whitespace_span(xb1.buffer + rval.consumed,
184 xb1.buffer_size - rval.consumed)
185 != (xb1.buffer_size - rval.consumed))) {
186 if(opt_debug_stream) {
187 fprintf(opt_debug_stream,
188 "Round-trip decode of %s required less bytes (%" ASN_PRI_SIZE ") than "
189 "encoded (%" ASN_PRI_SIZE ")\n",
190 td->name, rval.consumed, xb1.buffer_size);
192 ASN_STRUCT_FREE(*td, sptr);
195 return XEQ_ROUND_TRIP_FAILED;
199 * Reuse xb2 to encode newly decoded structure.
202 memset(&xb2, 0, sizeof(xb2));
204 e2 = xer_encode(td, sptr, XER_F_BASIC, xer__buffer_append, &xb2);
205 if(e2.encoded == -1) {
206 if(opt_debug_stream) {
207 fprintf(stderr, "XER Encoding of round-trip decode of %s failed\n",
210 ASN_STRUCT_FREE(*td, sptr);
213 return XEQ_ROUND_TRIP_FAILED;
216 ASN_STRUCT_FREE(*td, sptr);
219 if(xb1.buffer_size != xb2.buffer_size
220 || memcmp(xb1.buffer, xb2.buffer, xb1.buffer_size) != 0) {
221 if(opt_debug_stream) {
222 fprintf(opt_debug_stream,
223 "XER Encoding of round-trip decode of %s resulted in "
224 "different byte stream:\n"
225 "=== Original ===\n%s\n"
226 "=== Round-tripped ===\n%s\n",
227 xb1.buffer, xb2.buffer, td->name);
231 return XEQ_ROUND_TRIP_FAILED;