/* $NetBSD: gen_free.c,v 1.2.22.1 2023/08/11 13:39:56 martin Exp $ */ /* * 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("$NetBSD: gen_free.c,v 1.2.22.1 2023/08/11 13:39:56 martin Exp $"); static void free_primitive (const char *typename, const char *name) { fprintf (codefile, "der_free_%s(%s);\n", typename, name); } static void free_type (const char *name, const Type *t, int preserve) { switch (t->type) { case TType: #if 0 free_type (name, t->symbol->type, preserve); #endif fprintf (codefile, "free_%s(%s);\n", t->symbol->gen_name, name); break; case TInteger: if (t->range == NULL && t->members == NULL) { free_primitive ("heim_integer", name); break; } /* fallthrough */ case TBoolean: case TEnumerated : case TNull: case TGeneralizedTime: case TUTCTime: /* * This doesn't do much, but it leaves zeros where garbage might * otherwise have been found. Gets us closer to having the equivalent * of a memset()-to-zero data structure after calling the free * functions. */ fprintf(codefile, "*%s = 0;\n", name); break; case TBitString: if (ASN1_TAILQ_EMPTY(t->members)) free_primitive("bit_string", name); break; case TOctetString: free_primitive ("octet_string", name); break; case TChoice: case TSet: case TSequence: { Member *m, *have_ellipsis = NULL; if (t->members == NULL) break; if ((t->type == TSequence || t->type == TChoice) && preserve) fprintf(codefile, "der_free_octet_string(&data->_save);\n"); 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); if (asprintf (&s, "%s(%s)->%s%s", m->optional ? "" : "&", name, t->type == TChoice ? "u." : "", m->gen_name) < 0 || s == NULL) errx(1, "malloc"); if(m->optional) fprintf(codefile, "if(%s) {\n", s); free_type (s, m->type, FALSE); if(m->optional) fprintf(codefile, "free(%s);\n" "%s = NULL;\n" "}\n",s, s); free (s); if(t->type == TChoice) fprintf(codefile, "break;\n"); } if(t->type == TChoice) { if (have_ellipsis) fprintf(codefile, "case %s:\n" "der_free_octet_string(&(%s)->u.%s);\n" "break;", have_ellipsis->label, name, have_ellipsis->gen_name); fprintf(codefile, "}\n"); } break; } case TSetOf: case TSequenceOf: { char *n; fprintf (codefile, "while((%s)->len){\n", name); if (asprintf (&n, "&(%s)->val[(%s)->len-1]", name, name) < 0 || n == NULL) errx(1, "malloc"); free_type(n, t->subtype, FALSE); fprintf(codefile, "(%s)->len--;\n" "}\n", name); fprintf(codefile, "free((%s)->val);\n" "(%s)->val = NULL;\n", name, name); free(n); break; } case TGeneralString: free_primitive ("general_string", name); break; case TTeletexString: free_primitive ("general_string", name); break; case TUTF8String: free_primitive ("utf8string", name); break; case TPrintableString: free_primitive ("printable_string", name); break; case TIA5String: free_primitive ("ia5_string", name); break; case TBMPString: free_primitive ("bmp_string", name); break; case TUniversalString: free_primitive ("universal_string", name); break; case TVisibleString: free_primitive ("visible_string", name); break; case TTag: free_type (name, t->subtype, preserve); break; case TOID : free_primitive ("oid", name); break; default : abort (); } } void generate_type_free (const Symbol *s) { int preserve = preserve_type(s->name) ? TRUE : FALSE; fprintf (codefile, "void ASN1CALL\n" "free_%s(%s *data)\n" "{\n", s->gen_name, s->gen_name); free_type ("data", s->type, preserve); fprintf (codefile, "}\n\n"); }