gen_copy.c revision 55682 
1/*
2 * Copyright (c) 1997 - 1999 Kungliga Tekniska H�gskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include "gen_locl.h"
35
36RCSID("$Id: gen_copy.c,v 1.10 1999/12/02 17:05:02 joda Exp $");
37
38static void
39copy_primitive (const char *typename, const char *from, const char *to)
40{
41    fprintf (codefile, "if(copy_%s(%s, %s)) return ENOMEM;\n",
42	     typename, from, to);
43}
44
45static void
46copy_type (const char *from, const char *to, const Type *t)
47{
48  switch (t->type) {
49  case TType:
50#if 0
51      copy_type (from, to, t->symbol->type);
52#endif
53      fprintf (codefile, "if(copy_%s(%s, %s)) return ENOMEM;\n",
54	       t->symbol->gen_name, from, to);
55      break;
56  case TInteger:
57      fprintf(codefile, "*(%s) = *(%s);\n", to, from);
58      break;
59  case TOctetString:
60      copy_primitive ("octet_string", from, to);
61      break;
62  case TBitString: {
63      fprintf(codefile, "*(%s) = *(%s);\n", to, from);
64      break;
65  }
66  case TSequence: {
67      Member *m;
68      int tag = -1;
69
70      if (t->members == NULL)
71	  break;
72
73      for (m = t->members; m && tag != m->val; m = m->next) {
74	  char *f;
75	  char *t;
76
77	  asprintf (&f, "%s(%s)->%s",
78		    m->optional ? "" : "&", from, m->gen_name);
79	  asprintf (&t, "%s(%s)->%s",
80		    m->optional ? "" : "&", to, m->gen_name);
81	  if(m->optional){
82	      fprintf(codefile, "if(%s) {\n", f);
83	      fprintf(codefile, "%s = malloc(sizeof(*%s));\n", t, t);
84	      fprintf(codefile, "if(%s == NULL) return ENOMEM;\n", t);
85	  }
86	  copy_type (f, t, m->type);
87	  if(m->optional){
88	      fprintf(codefile, "}else\n");
89	      fprintf(codefile, "%s = NULL;\n", t);
90	  }
91	  if (tag == -1)
92	      tag = m->val;
93	  free (f);
94	  free (t);
95      }
96      break;
97  }
98  case TSequenceOf: {
99      char *f;
100      char *T;
101
102      fprintf (codefile, "if(((%s)->val = "
103	       "malloc((%s)->len * sizeof(*(%s)->val))) == NULL && (%s)->len != 0)\n",
104	       to, from, to, from);
105      fprintf (codefile, "return ENOMEM;\n");
106      fprintf(codefile,
107	      "for((%s)->len = 0; (%s)->len < (%s)->len; (%s)->len++){\n",
108	      to, to, from, to);
109      asprintf(&f, "&(%s)->val[(%s)->len]", from, to);
110      asprintf(&T, "&(%s)->val[(%s)->len]", to, to);
111      copy_type(f, T, t->subtype);
112      fprintf(codefile, "}\n");
113      free(f);
114      free(T);
115      break;
116  }
117  case TGeneralizedTime:
118      fprintf(codefile, "*(%s) = *(%s);\n", to, from);
119      break;
120  case TGeneralString:
121      copy_primitive ("general_string", from, to);
122      break;
123  case TApplication:
124      copy_type (from, to, t->subtype);
125      break;
126  default :
127      abort ();
128  }
129}
130
131void
132generate_type_copy (const Symbol *s)
133{
134  fprintf (headerfile,
135	   "int    copy_%s  (const %s *, %s *);\n",
136	   s->gen_name, s->gen_name, s->gen_name);
137
138  fprintf (codefile, "int\n"
139	   "copy_%s(const %s *from, %s *to)\n"
140	   "{\n",
141	   s->gen_name, s->gen_name, s->gen_name);
142
143  copy_type ("from", "to", s->type);
144  fprintf (codefile, "return 0;\n}\n\n");
145}
146
147