encdec.c 13.9 KB
Newer Older
Elemer Lelik's avatar
Elemer Lelik committed
1
///////////////////////////////////////////////////////////////////////////////
Elemer Lelik's avatar
Elemer Lelik committed
2
// Copyright (c) 2000-2015 Ericsson Telecom AB
Elemer Lelik's avatar
Elemer Lelik committed
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// which accompanies this distribution, and is available at
// http://www.eclipse.org/legal/epl-v10.html
///////////////////////////////////////////////////////////////////////////////
#include "../common/memory.h"
#include "datatypes.h"
#include "main.hh"
#include "encdec.h"

void def_encdec(const char *p_classname,
                char **p_classdef, char **p_classsrc,
                boolean ber, boolean raw, boolean text, boolean xer,
                boolean json, boolean is_leaf)
{
  char *def=NULL;
  char *src=NULL;

  def=mputstr
    (def,
     "void encode(const TTCN_Typedescriptor_t&, TTCN_Buffer&,"
     " TTCN_EncDec::coding_t, ...) const;\n"
     "void decode(const TTCN_Typedescriptor_t&, TTCN_Buffer&,"
     " TTCN_EncDec::coding_t, ...);\n");
  if(ber)
    def=mputstr(def,
     "ASN_BER_TLV_t* BER_encode_TLV(const TTCN_Typedescriptor_t& p_td,"
     " unsigned p_coding) const;\n"
     "boolean BER_decode_TLV(const TTCN_Typedescriptor_t& p_td, const"
     " ASN_BER_TLV_t& p_tlv, unsigned L_form);\n"
     );
  if(raw)
    def=mputprintf(def,
     "int RAW_encode(const TTCN_Typedescriptor_t&, RAW_enc_tree&) const;\n"
     "int RAW_decode(const TTCN_Typedescriptor_t&, TTCN_Buffer&,"
     " int, raw_order_t, boolean no_err=FALSE,"
     "int sel_field=-1, boolean first_call=TRUE);\n"
     );
  if(text)
    def=mputprintf(def,
     "int TEXT_encode(const TTCN_Typedescriptor_t&, TTCN_Buffer&) const;\n"
     "int TEXT_decode(const TTCN_Typedescriptor_t&,"
     "TTCN_Buffer&, Limit_Token_List&, boolean no_err=FALSE,"
     "boolean first_call=TRUE);\n"
     );
  if (xer) /* XERSTUFF encdec function headers */
    def=mputprintf(def,
#ifndef NDEBUG
      "// written by %s in " __FILE__ " at %d\n"
#endif
Elemer Lelik's avatar
Elemer Lelik committed
53
54
55
56
      "int XER_encode(const XERdescriptor_t&, TTCN_Buffer&, unsigned int, int, "
      "embed_values_enc_struct_t*) const;\n"
      "int XER_decode(const XERdescriptor_t&, XmlReaderWrap&, unsigned int, "
      "embed_values_dec_struct_t*);\n"
Elemer Lelik's avatar
Elemer Lelik committed
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
      "static boolean can_start(const char *name, const char *uri, "
      "XERdescriptor_t const& xd, unsigned int);\n"
      "%s"
#ifndef NDEBUG
      , __FUNCTION__, __LINE__
#endif
      , use_runtime_2 ?
        "boolean can_start_v(const char *name, const char *uri, "
        "XERdescriptor_t const& xd, unsigned int);\n" : ""
    );
  if(json) {
    def = mputprintf(def,
      "int JSON_encode(const TTCN_Typedescriptor_t&, JSON_Tokenizer&) const;\n"
      "int JSON_decode(const TTCN_Typedescriptor_t&, JSON_Tokenizer&, boolean);\n");
  }

  src=mputprintf(src,
     "void %s::encode(const TTCN_Typedescriptor_t& p_td,"
     " TTCN_Buffer& p_buf, TTCN_EncDec::coding_t p_coding, ...) const\n"
     "{\n"
     "  va_list pvar;\n"
     "  va_start(pvar, p_coding);\n"
     "  switch(p_coding) {\n"
     "  case TTCN_EncDec::CT_BER: {\n"
     "    TTCN_EncDec_ErrorContext ec(\"While BER-encoding type"
     " '%%s': \", p_td.name);\n"
     "    unsigned BER_coding=va_arg(pvar, unsigned);\n"
     "    BER_encode_chk_coding(BER_coding);\n"
     "    ASN_BER_TLV_t *tlv=BER_encode_TLV(p_td, BER_coding);\n"
     "    tlv->put_in_buffer(p_buf);\n"
     "    ASN_BER_TLV_t::destruct(tlv);\n"
     "    break;}\n"
     "  case TTCN_EncDec::CT_RAW: {\n"
     "    TTCN_EncDec_ErrorContext ec(\"While RAW-encoding type"
     " '%%s': \", p_td.name);\n"
     "    if(!p_td.raw)\n"
     "      TTCN_EncDec_ErrorContext::error_internal\n"
     "        (\"No RAW descriptor available for type '%%s'.\", p_td.name);\n"
     "    RAW_enc_tr_pos rp;\n"
     "    rp.level=0;\n"
     "    rp.pos=NULL;\n"
     "    RAW_enc_tree root(%s, NULL, &rp, 1, p_td.raw);\n"
     "    RAW_encode(p_td, root);\n"
     "    root.put_to_buf(p_buf);\n"
     "    break;}\n"
     "  case TTCN_EncDec::CT_TEXT: {\n"
     "    TTCN_EncDec_ErrorContext ec("
     "\"While TEXT-encoding type '%%s': \", p_td.name);\n"
     "    if(!p_td.text)\n"
     "      TTCN_EncDec_ErrorContext::error_internal\n"
     "      (\"No TEXT descriptor available for type '%%s'.\", p_td.name);\n"
     "    TEXT_encode(p_td,p_buf);\n"
     "    break;}\n"
     /* XERSTUFF encoder */
     "  case TTCN_EncDec::CT_XER: {\n"
     "    TTCN_EncDec_ErrorContext ec("
     "\"While XER-encoding type '%%s': \", p_td.name);\n"
     "    unsigned XER_coding=va_arg(pvar, unsigned);\n"
     "    XER_encode_chk_coding(XER_coding, p_td);\n"
      /* Do not use %s_xer_ here. It supplies the XER descriptor of oldtype
       * even if encoding newtype for:
       * <ttcn>type newtype oldtype;</ttcn> */
Elemer Lelik's avatar
Elemer Lelik committed
119
     "    XER_encode(*(p_td.xer),p_buf, XER_coding, 0, 0);\n"
Elemer Lelik's avatar
Elemer Lelik committed
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
     "    p_buf.put_c('\\n');\n" /* make sure it has a newline */
     "    break;}\n"
     "  case TTCN_EncDec::CT_JSON: {\n"
     "    TTCN_EncDec_ErrorContext ec("
     "\"While JSON-encoding type '%%s': \", p_td.name);\n"
     "    if(!p_td.json)\n"
     "      TTCN_EncDec_ErrorContext::error_internal\n"
     "        (\"No JSON descriptor available for type '%%s'.\", p_td.name);\n"
     "    JSON_Tokenizer tok(va_arg(pvar, int) != 0);\n"
     "    JSON_encode(p_td, tok);\n"
     "    p_buf.put_s(tok.get_buffer_length(), (const unsigned char*)tok.get_buffer());\n"
     "    break;}\n"
     "  default:\n"
     "    TTCN_error(\"Unknown coding method requested to encode"
     " type '%%s'\", p_td.name);\n"
     "  }\n"
     "  va_end(pvar);\n"
     "}\n"
     "\n"
    , p_classname, is_leaf?"TRUE":"FALSE"
    );

  src=mputprintf(src,
#ifndef NDEBUG
     "// written by %s in " __FILE__ " at %d\n"
#endif
     "void %s::decode(const TTCN_Typedescriptor_t& p_td,"
     " TTCN_Buffer& p_buf, TTCN_EncDec::coding_t p_coding, ...)\n"
     "{\n"
     "  va_list pvar;\n"
     "  va_start(pvar, p_coding);\n"
     "  switch(p_coding) {\n"
     "  case TTCN_EncDec::CT_BER: {\n"
     "    TTCN_EncDec_ErrorContext ec(\"While BER-decoding type"
     " '%%s': \", p_td.name);\n"
     "    unsigned L_form=va_arg(pvar, unsigned);\n"
     "    ASN_BER_TLV_t tlv;\n"
     "    BER_decode_str2TLV(p_buf, tlv, L_form);\n"
     "    BER_decode_TLV(p_td, tlv, L_form);\n"
     "    if(tlv.isComplete) p_buf.increase_pos(tlv.get_len());\n"
     "    break;}\n"
     "  case TTCN_EncDec::CT_RAW: {\n"
     "    TTCN_EncDec_ErrorContext ec(\"While RAW-decoding"
     " type '%%s': \", p_td.name);\n"
     "    if(!p_td.raw)\n"
     "      TTCN_EncDec_ErrorContext::error_internal\n"
     "        (\"No RAW descriptor available for type '%%s'.\", p_td.name);\n"
     "    raw_order_t r_order;\n"
     "    switch(p_td.raw->top_bit_order) {\n"
     "    case TOP_BIT_LEFT:\n"
     "      r_order=ORDER_LSB;\n"
     "      break;\n"
     "    case TOP_BIT_RIGHT:\n"
     "    default:\n"
     "      r_order=ORDER_MSB;\n"
     "    }\n"
     "    int rawr = RAW_decode(p_td, p_buf, p_buf.get_len()*8, r_order);\n"
     "    if(rawr<0) switch (-rawr) {\n"
     "    case TTCN_EncDec::ET_INCOMPL_MSG:\n"
     "    case TTCN_EncDec::ET_LEN_ERR:\n"
     "      ec.error((TTCN_EncDec::error_type_t)-rawr, "
     "\"Can not decode type '%%s', because incomplete message was received\", "
     "p_td.name);\n"
     "      break;\n"
     "    case 1:\n" /* from the generic -1 return value */
     "    default:\n"
     "      ec.error(TTCN_EncDec::ET_INVAL_MSG, "
     "\"Can not decode type '%%s', because invalid "
     "message was received\", p_td.name);\n"
     "      break;\n"
     "    }\n"
     "    break;}\n"
     "  case TTCN_EncDec::CT_TEXT: {\n"
     "    Limit_Token_List limit;\n"
     "    TTCN_EncDec_ErrorContext ec(\"While TEXT-decoding type '%%s': \","
     " p_td.name);\n"
     "    if(!p_td.text)\n"
     "      TTCN_EncDec_ErrorContext::error_internal\n"
     "        (\"No TEXT descriptor available for type '%%s'.\", p_td.name);\n"
     "    const unsigned char *b_data=p_buf.get_data();\n"
     "    if(b_data[p_buf.get_len()-1]!='\\0'){\n"
     "      p_buf.set_pos(p_buf.get_len());\n"
     "      p_buf.put_zero(8,ORDER_LSB);\n"
     "      p_buf.rewind();\n"
     "    }\n"
     "    if(TEXT_decode(p_td,p_buf,limit)<0)\n"
     "      ec.error(TTCN_EncDec::ET_INCOMPL_MSG,"
     "\"Can not decode type '%%s', because invalid or incomplete"
     " message was received\", p_td.name);\n"
     "    break;}\n"
     /* XERSTUFF decoder */
     "  case TTCN_EncDec::CT_XER: {\n"
     "    TTCN_EncDec_ErrorContext ec("
     "\"While XER-decoding type '%%s': \", p_td.name);\n"
     "    unsigned XER_coding=va_arg(pvar, unsigned);\n"
     "    XER_encode_chk_coding(XER_coding, p_td);\n"
     "    XmlReaderWrap reader(p_buf);\n"
     "    for (int rd_ok=reader.Read(); rd_ok==1; rd_ok=reader.Read()) {\n"
     "      if (reader.NodeType() == XML_READER_TYPE_ELEMENT) break;\n"
     "    }\n"
Elemer Lelik's avatar
Elemer Lelik committed
220
     "    XER_decode(*(p_td.xer), reader, XER_coding | XER_TOPLEVEL, 0);\n"
Elemer Lelik's avatar
Elemer Lelik committed
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
     "    size_t bytes = reader.ByteConsumed();\n"
     "    p_buf.set_pos(bytes);\n"
     "    break;}\n"
     "  case TTCN_EncDec::CT_JSON: {\n"
     "    TTCN_EncDec_ErrorContext ec(\"While JSON-decoding type '%%s': \","
     " p_td.name);\n"
     "    if(!p_td.json)\n"
     "      TTCN_EncDec_ErrorContext::error_internal\n"
     "        (\"No JSON descriptor available for type '%%s'.\", p_td.name);\n"
     "    JSON_Tokenizer tok((const char*)p_buf.get_data(), p_buf.get_len());\n"
     "    if(JSON_decode(p_td, tok, false)<0)\n"
     "      ec.error(TTCN_EncDec::ET_INCOMPL_MSG,"
     "\"Can not decode type '%%s', because invalid or incomplete"
     " message was received\", p_td.name);\n"
     "    p_buf.set_pos(tok.get_buf_pos());\n"
     "    break;}\n"
     "  default:\n"
     "    TTCN_error(\"Unknown coding method requested to decode"
     " type '%%s'\", p_td.name);\n"
     "  }\n"
     "  va_end(pvar);\n"
     "}\n\n"
#ifndef NDEBUG
     , __FUNCTION__, __LINE__
#endif
     , p_classname);

  *p_classdef=mputstr(*p_classdef, def);
  Free(def);
  *p_classsrc=mputstr(*p_classsrc, src);
  Free(src);
}

char *genRawFieldChecker(char *src, const rawAST_coding_taglist *taglist,
  boolean is_equal)
{
  int i;
  for (i = 0; i < taglist->nElements; i++) {
    rawAST_coding_field_list *fields = taglist->fields + i;
    char *field_name = NULL;
    boolean first_expr = TRUE;
    int j;
    if (i > 0) src = mputstr(src, is_equal ? " || " : " && ");
    for (j = 0; j < fields->nElements; j++) {
      rawAST_coding_fields *field = fields->fields + j;
      if (j == 0) {
        /* this is the first field reference */
        if (field->fieldtype == UNION_FIELD)
          field_name = mputprintf(field_name,"(*field_%s)",field->nthfieldname);
        else
          field_name = mputprintf(field_name,"field_%s", field->nthfieldname);
      }
      else {
        /* this is not the first field reference */
        if (field->fieldtype == UNION_FIELD) {
          /* checking for the right selection within the union */
          if (first_expr) {
            if (taglist->nElements > 1) src = mputc(src, '(');
            first_expr = FALSE;
          }
          else src = mputstr(src, is_equal ? " && " : " || ");
          src = mputprintf(src, "%s.get_selection() %s %s%s%s", field_name,
            is_equal ? "==" : "!=", fields->fields[j - 1].type,
            "::ALT_", field->nthfieldname);
        }
        /* appending the current field name to the field reference */
        field_name = mputprintf(field_name, ".%s()", field->nthfieldname);
      }
      if (j < fields->nElements - 1 && field->fieldtype == OPTIONAL_FIELD) {
        /* this is not the last field in the chain and it is optional */
        if (first_expr) {
          if (taglist->nElements > 1) src = mputc(src, '(');
          first_expr = FALSE;
        }
        else src = mputstr(src, is_equal ? " && " : " || ");
        /* check for the presence */
        if (!is_equal) src = mputc(src, '!');
        src = mputprintf(src, "%s.ispresent()", field_name);
        /* add an extra () to the field reference */
        field_name = mputstr(field_name, "()");
      }
    }
    if (!first_expr) src = mputstr(src, is_equal ? " && " : " || ");
    /* compare the referred field with the given value */
    src = mputprintf(src, "%s %s %s", field_name, is_equal ? "==" : "!=",
      fields->value);
    if (!first_expr && taglist->nElements > 1) src = mputc(src, ')');
    Free(field_name);
  }
  return src;
}

char *genRawTagChecker(char *src, const rawAST_coding_taglist *taglist)
{
  int temp_tag, l;
  rawAST_coding_field_list temp_field;
  src = mputstr(src, "  RAW_enc_tree* temp_leaf;\n");
  for (temp_tag = 0; temp_tag < taglist->nElements; temp_tag++) {
    temp_field = taglist->fields[temp_tag];
    src = mputprintf(src, "  {\n"
      "  RAW_enc_tr_pos pr_pos;\n"
      "  pr_pos.level=myleaf.curr_pos.level+%d;\n"
      "  int new_pos[]={", temp_field.nElements);
    for (l = 0; l < temp_field.nElements; l++) {
      src= mputprintf(src, "%s%d", l ? "," : "", temp_field.fields[l].nthfield);
    }
    src = mputprintf(src, "};\n"
      "  pr_pos.pos=init_new_tree_pos(myleaf.curr_pos,%d,new_pos);\n"
      "  temp_leaf = myleaf.get_node(pr_pos);\n"
      "  if(temp_leaf != NULL){\n", temp_field.nElements);
    if (temp_field.value[0] != ' ') {
      src = mputprintf(src, "  %s new_val = %s;\n"
        "  new_val.RAW_encode(%s_descr_,*temp_leaf);\n",
        temp_field.fields[temp_field.nElements - 1].type, temp_field.value,
        temp_field.fields[temp_field.nElements - 1].typedescr);
    }
    else {
      src = mputprintf(src, "  %s.RAW_encode(%s_descr_,*temp_leaf);\n",
        temp_field.value, temp_field.fields[temp_field.nElements - 1].typedescr);
    }
    src = mputstr(src, "  } else");
  }
  src = mputstr(src, " {\n"
    "    TTCN_EncDec_ErrorContext::error\n"
    "      (TTCN_EncDec::ET_OMITTED_TAG, \"Encoding a tagged, but omitted"
    " value.\");\n"
    "  }\n");
  for (temp_tag = 0; temp_tag < taglist->nElements; temp_tag++) {
    src = mputstr(src, "  free_tree_pos(pr_pos.pos);\n"
      "  }\n");
  }
  return src;
}