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/*
* Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan
* (Royal Institute of Technology, Stockholm, Sweden).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "gen_locl.h"
RCSID("$Id: gen_length.c,v 1.21 2006/10/14 05:28:28 lha Exp $");
static void
length_primitive (const char *typename,
const char *name,
const char *variable)
{
fprintf (codefile, "%s += der_length_%s(%s);\n", variable, typename, name);
}
static size_t
length_tag(unsigned int tag)
{
size_t len = 0;
if(tag <= 30)
return 1;
while(tag) {
tag /= 128;
len++;
}
return len + 1;
}
static int
length_type (const char *name, const Type *t,
const char *variable, const char *tmpstr)
{
switch (t->type) {
case TType:
#if 0
length_type (name, t->symbol->type);
#endif
fprintf (codefile, "%s += length_%s(%s);\n",
variable, t->symbol->gen_name, name);
break;
case TInteger:
if(t->members) {
char *s;
asprintf(&s, "(const int*)%s", name);
if(s == NULL)
errx (1, "out of memory");
length_primitive ("integer", s, variable);
free(s);
} else if (t->range == NULL) {
length_primitive ("heim_integer", name, variable);
} else if (t->range->min == INT_MIN && t->range->max == INT_MAX) {
length_primitive ("integer", name, variable);
} else if (t->range->min == 0 && t->range->max == UINT_MAX) {
length_primitive ("unsigned", name, variable);
} else if (t->range->min == 0 && t->range->max == INT_MAX) {
length_primitive ("unsigned", name, variable);
} else
errx(1, "%s: unsupported range %d -> %d",
name, t->range->min, t->range->max);
break;
case TBoolean:
fprintf (codefile, "%s += 1;\n", variable);
break;
case TEnumerated :
length_primitive ("enumerated", name, variable);
break;
case TOctetString:
length_primitive ("octet_string", name, variable);
break;
case TBitString: {
if (ASN1_TAILQ_EMPTY(t->members))
length_primitive("bit_string", name, variable);
else {
if (!rfc1510_bitstring) {
Member *m;
int pos = ASN1_TAILQ_LAST(t->members, memhead)->val;
fprintf(codefile,
"do {\n");
ASN1_TAILQ_FOREACH_REVERSE(m, t->members, memhead, members) {
while (m->val / 8 < pos / 8) {
pos -= 8;
}
fprintf (codefile,
"if((%s)->%s) { %s += %d; break; }\n",
name, m->gen_name, variable, (pos + 8) / 8);
}
fprintf(codefile,
"} while(0);\n");
fprintf (codefile, "%s += 1;\n", variable);
} else {
fprintf (codefile, "%s += 5;\n", variable);
}
}
break;
}
case TSet:
case TSequence:
case TChoice: {
Member *m, *have_ellipsis = NULL;
if (t->members == NULL)
break;
if(t->type == TChoice)
fprintf (codefile, "switch((%s)->element) {\n", name);
ASN1_TAILQ_FOREACH(m, t->members, members) {
char *s;
if (m->ellipsis) {
have_ellipsis = m;
continue;
}
if(t->type == TChoice)
fprintf(codefile, "case %s:\n", m->label);
asprintf (&s, "%s(%s)->%s%s",
m->optional ? "" : "&", name,
t->type == TChoice ? "u." : "", m->gen_name);
if (s == NULL)
errx(1, "malloc");
if (m->optional)
fprintf (codefile, "if(%s)", s);
else if(m->defval)
gen_compare_defval(s + 1, m->defval);
fprintf (codefile, "{\n"
"size_t %s_oldret = %s;\n"
"%s = 0;\n", tmpstr, variable, variable);
length_type (s, m->type, "ret", m->gen_name);
fprintf (codefile, "ret += %s_oldret;\n", tmpstr);
fprintf (codefile, "}\n");
free (s);
if(t->type == TChoice)
fprintf(codefile, "break;\n");
}
if(t->type == TChoice) {
if (have_ellipsis)
fprintf(codefile,
"case %s:\n"
"ret += (%s)->u.%s.length;\n"
"break;\n",
have_ellipsis->label,
name,
have_ellipsis->gen_name);
fprintf (codefile, "}\n"); /* switch */
}
break;
}
case TSetOf:
case TSequenceOf: {
char *n;
char *sname;
fprintf (codefile,
"{\n"
"int %s_oldret = %s;\n"
"int i;\n"
"%s = 0;\n",
tmpstr, variable, variable);
fprintf (codefile, "for(i = (%s)->len - 1; i >= 0; --i){\n", name);
fprintf (codefile, "int %s_for_oldret = %s;\n"
"%s = 0;\n", tmpstr, variable, variable);
asprintf (&n, "&(%s)->val[i]", name);
if (n == NULL)
errx(1, "malloc");
asprintf (&sname, "%s_S_Of", tmpstr);
if (sname == NULL)
errx(1, "malloc");
length_type(n, t->subtype, variable, sname);
fprintf (codefile, "%s += %s_for_oldret;\n",
variable, tmpstr);
fprintf (codefile, "}\n");
fprintf (codefile,
"%s += %s_oldret;\n"
"}\n", variable, tmpstr);
free(n);
free(sname);
break;
}
case TGeneralizedTime:
length_primitive ("generalized_time", name, variable);
break;
case TGeneralString:
length_primitive ("general_string", name, variable);
break;
case TUTCTime:
length_primitive ("utctime", name, variable);
break;
case TUTF8String:
length_primitive ("utf8string", name, variable);
break;
case TPrintableString:
length_primitive ("printable_string", name, variable);
break;
case TIA5String:
length_primitive ("ia5_string", name, variable);
break;
case TBMPString:
length_primitive ("bmp_string", name, variable);
break;
case TUniversalString:
length_primitive ("universal_string", name, variable);
break;
case TNull:
fprintf (codefile, "/* NULL */\n");
break;
case TTag:{
char *tname;
asprintf(&tname, "%s_tag", tmpstr);
if (tname == NULL)
errx(1, "malloc");
length_type (name, t->subtype, variable, tname);
fprintf (codefile, "ret += %lu + der_length_len (ret);\n",
(unsigned long)length_tag(t->tag.tagvalue));
free(tname);
break;
}
case TOID:
length_primitive ("oid", name, variable);
break;
default :
abort ();
}
return 0;
}
void
generate_type_length (const Symbol *s)
{
fprintf (headerfile,
"size_t length_%s(const %s *);\n",
s->gen_name, s->gen_name);
fprintf (codefile,
"size_t\n"
"length_%s(const %s *data)\n"
"{\n"
"size_t ret = 0;\n",
s->gen_name, s->gen_name);
length_type ("data", s->type, "ret", "Top");
fprintf (codefile, "return ret;\n}\n\n");
}
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