2 * Copyright (c) 2003, 2004 Lev Walkin <vlm@lionet.info>. All rights reserved.
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3 * Redistribution and modifications are permitted subject to BSD license.
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5 #include <asn_internal.h>
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10 * The XER encoder of any type. May be invoked by the application.
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13 xer_encode(const asn_TYPE_descriptor_t *td, const void *sptr,
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14 enum xer_encoder_flags_e xer_flags, asn_app_consume_bytes_f *cb,
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16 asn_enc_rval_t er = {0, 0, 0};
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17 asn_enc_rval_t tmper;
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20 int xcan = (xer_flags & XER_F_CANONICAL) ? 1 : 2;
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22 if(!td || !sptr) goto cb_failed;
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24 mname = td->xml_tag;
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25 mlen = strlen(mname);
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27 ASN__CALLBACK3("<", 1, mname, mlen, ">", 1);
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29 tmper = td->op->xer_encoder(td, sptr, 1, xer_flags, cb, app_key);
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30 if(tmper.encoded == -1) return tmper;
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31 er.encoded += tmper.encoded;
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33 ASN__CALLBACK3("</", 2, mname, mlen, ">\n", xcan);
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35 ASN__ENCODED_OK(er);
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41 * This is a helper function for xer_fprint, which directs all incoming data
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42 * into the provided file descriptor.
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45 xer__print2fp(const void *buffer, size_t size, void *app_key) {
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46 FILE *stream = (FILE *)app_key;
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48 if(fwrite(buffer, 1, size, stream) != size)
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55 xer_fprint(FILE *stream, const asn_TYPE_descriptor_t *td, const void *sptr) {
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56 asn_enc_rval_t er = {0,0,0};
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58 if(!stream) stream = stdout;
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62 er = xer_encode(td, sptr, XER_F_BASIC, xer__print2fp, stream);
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63 if(er.encoded == -1)
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66 return fflush(stream);
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72 size_t allocated_size;
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76 xer__buffer_append(const void *buffer, size_t size, void *app_key) {
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77 struct xer_buffer *xb = app_key;
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79 while(xb->buffer_size + size + 1 > xb->allocated_size) {
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80 size_t new_size = 2 * (xb->allocated_size ? xb->allocated_size : 64);
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81 char *new_buf = MALLOC(new_size);
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82 if(!new_buf) return -1;
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84 memcpy(new_buf, xb->buffer, xb->buffer_size);
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86 FREEMEM(xb->buffer);
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87 xb->buffer = new_buf;
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88 xb->allocated_size = new_size;
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91 memcpy(xb->buffer + xb->buffer_size, buffer, size);
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92 xb->buffer_size += size;
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93 xb->buffer[xb->buffer_size] = '\0';
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97 enum xer_equivalence_e
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98 xer_equivalent(const struct asn_TYPE_descriptor_s *td, const void *struct1,
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99 const void *struct2, FILE *opt_debug_stream) {
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100 struct xer_buffer xb1 = {0, 0, 0};
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101 struct xer_buffer xb2 = {0, 0, 0};
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102 asn_enc_rval_t e1, e2;
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103 asn_dec_rval_t rval;
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106 if(!td || !struct1 || !struct2) {
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107 if(opt_debug_stream) {
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108 if(!td) fprintf(opt_debug_stream, "Type descriptor missing\n");
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109 if(!struct1) fprintf(opt_debug_stream, "Structure 1 missing\n");
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110 if(!struct2) fprintf(opt_debug_stream, "Structure 2 missing\n");
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112 return XEQ_FAILURE;
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115 e1 = xer_encode(td, struct1, XER_F_BASIC, xer__buffer_append, &xb1);
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116 if(e1.encoded == -1) {
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117 if(opt_debug_stream) {
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118 fprintf(stderr, "XER Encoding of %s failed\n", td->name);
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120 FREEMEM(xb1.buffer);
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121 return XEQ_ENCODE1_FAILED;
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124 e2 = xer_encode(td, struct2, XER_F_BASIC, xer__buffer_append, &xb2);
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125 if(e2.encoded == -1) {
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126 if(opt_debug_stream) {
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127 fprintf(stderr, "XER Encoding of %s failed\n", td->name);
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129 FREEMEM(xb1.buffer);
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130 FREEMEM(xb2.buffer);
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131 return XEQ_ENCODE1_FAILED;
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134 if(xb1.buffer_size != xb2.buffer_size
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135 || memcmp(xb1.buffer, xb2.buffer, xb1.buffer_size) != 0) {
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136 if(opt_debug_stream) {
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137 fprintf(opt_debug_stream,
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138 "Structures XER-encoded into different byte streams:\n=== "
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139 "Structure 1 ===\n%s\n=== Structure 2 ===\n%s\n",
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140 xb1.buffer, xb2.buffer);
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142 FREEMEM(xb1.buffer);
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143 FREEMEM(xb2.buffer);
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144 return XEQ_DIFFERENT;
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146 if(opt_debug_stream) {
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147 fprintf(opt_debug_stream,
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148 "Both structures encoded into the same XER byte stream "
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149 "of size %" ASN_PRI_SIZE ":\n%s",
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150 xb1.buffer_size, xb1.buffer);
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154 rval = xer_decode(NULL, td, (void **)&sptr, xb1.buffer,
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156 switch(rval.code) {
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160 if(opt_debug_stream) {
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161 fprintf(opt_debug_stream,
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162 "Structure %s XER decode unexpectedly requires "
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163 "more data:\n%s\n",
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164 td->name, xb1.buffer);
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169 if(opt_debug_stream) {
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170 fprintf(opt_debug_stream,
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171 "Structure %s XER decoding resulted in failure.\n",
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174 ASN_STRUCT_FREE(*td, sptr);
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175 FREEMEM(xb1.buffer);
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176 FREEMEM(xb2.buffer);
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177 return XEQ_DECODE_FAILED;
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180 if(rval.consumed != xb1.buffer_size
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181 && ((rval.consumed > xb1.buffer_size)
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182 || xer_whitespace_span(xb1.buffer + rval.consumed,
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183 xb1.buffer_size - rval.consumed)
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184 != (xb1.buffer_size - rval.consumed))) {
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185 if(opt_debug_stream) {
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186 fprintf(opt_debug_stream,
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187 "Round-trip decode of %s required less bytes (%" ASN_PRI_SIZE ") than "
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188 "encoded (%" ASN_PRI_SIZE ")\n",
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189 td->name, rval.consumed, xb1.buffer_size);
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191 ASN_STRUCT_FREE(*td, sptr);
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192 FREEMEM(xb1.buffer);
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193 FREEMEM(xb2.buffer);
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194 return XEQ_ROUND_TRIP_FAILED;
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198 * Reuse xb2 to encode newly decoded structure.
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200 FREEMEM(xb2.buffer);
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201 memset(&xb2, 0, sizeof(xb2));
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203 e2 = xer_encode(td, sptr, XER_F_BASIC, xer__buffer_append, &xb2);
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204 if(e2.encoded == -1) {
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205 if(opt_debug_stream) {
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206 fprintf(stderr, "XER Encoding of round-trip decode of %s failed\n",
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209 ASN_STRUCT_FREE(*td, sptr);
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210 FREEMEM(xb1.buffer);
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211 FREEMEM(xb2.buffer);
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212 return XEQ_ROUND_TRIP_FAILED;
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215 ASN_STRUCT_FREE(*td, sptr);
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218 if(xb1.buffer_size != xb2.buffer_size
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219 || memcmp(xb1.buffer, xb2.buffer, xb1.buffer_size) != 0) {
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220 if(opt_debug_stream) {
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221 fprintf(opt_debug_stream,
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222 "XER Encoding of round-trip decode of %s resulted in "
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223 "different byte stream:\n"
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224 "=== Original ===\n%s\n"
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225 "=== Round-tripped ===\n%s\n",
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226 xb1.buffer, xb2.buffer, td->name);
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228 FREEMEM(xb1.buffer);
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229 FREEMEM(xb2.buffer);
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230 return XEQ_ROUND_TRIP_FAILED;
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233 FREEMEM(xb1.buffer);
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234 FREEMEM(xb2.buffer);
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235 return XEQ_SUCCESS;
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