gen_seq.c

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/*
 * Copyright (c) 1997 - 2006 Kungliga Tekniska H鰃skolan
 * (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_seq.c 20561 2007-04-24 16:14:30Z lha $");

void
generate_type_seq (const Symbol *s)
{
    char *subname;
    Type *type;

    if (!seq_type(s->name))
	return;
    type = s->type;
    while(type->type == TTag)
	type = type->subtype;

    if (type->type != TSequenceOf) {
	printf("%s not seq of %d\n", s->name, (int)type->type);
	return;
    }

    /*
     * Require the subtype to be a type so we can name it and use
     * copy_/free_
     */
    
    if (type->subtype->type != TType) {
	fprintf(stderr, "%s subtype is not a type, can't generate "
	       "sequence code for this case: %d\n",
		s->name, (int)type->subtype->type);
	exit(1);
    }

    subname = type->subtype->symbol->gen_name;

    fprintf (headerfile,
	     "int   add_%s  (%s *, const %s *);\n"
	     "int   remove_%s  (%s *, unsigned int);\n",
	     s->gen_name, s->gen_name, subname,
	     s->gen_name, s->gen_name);

    fprintf (codefile, "int\n"
	     "add_%s(%s *data, const %s *element)\n"
	     "{\n",
	     s->gen_name, s->gen_name, subname);

    fprintf (codefile, 
	     "int ret;\n"
	     "void *ptr;\n"
	     "\n"
	     "ptr = realloc(data->val, \n"
	     "\t(data->len + 1) * sizeof(data->val[0]));\n"
	     "if (ptr == NULL) return ENOMEM;\n"
	     "data->val = ptr;\n\n"
	     "ret = copy_%s(element, &data->val[data->len]);\n"
	     "if (ret) return ret;\n"
	     "data->len++;\n"
	     "return 0;\n",
	     subname);

    fprintf (codefile, "}\n\n");
    
    fprintf (codefile, "int\n"
	     "remove_%s(%s *data, unsigned int element)\n"
	     "{\n",
	     s->gen_name, s->gen_name);

    fprintf (codefile, 
	     "void *ptr;\n"
	     "\n"
	     "if (data->len == 0 || element >= data->len)\n"
	     "\treturn ASN1_OVERRUN;\n"
	     "free_%s(&data->val[element]);\n"
	     "data->len--;\n"
	     /* don't move if its the last element */
	     "if (element < data->len)\n"
	     "\tmemmove(&data->val[element], &data->val[element + 1], \n"
	     "\t\tsizeof(data->val[0]) * data->len);\n"
	     /* resize but don't care about failures since it doesn't matter */
	     "ptr = realloc(data->val, data->len * sizeof(data->val[0]));\n"
	     "if (ptr != NULL || data->len == 0) data->val = ptr;\n"
	     "return 0;\n",
	     subname);

    fprintf (codefile, "}\n\n");
}