/*
 * Copyright (c) 1995-2004, Index Data
 * See the file LICENSE for details.
 *
 * $Id: odr_seq.c,v 1.2 2004/10/15 00:19:00 adam Exp $
 */
/**
 * \file odr_seq.c
 * \brief Implements ODR SEQUENCE codec
 */
#if HAVE_CONFIG_H
#include <config.h>
#endif

#include "odr-priv.h"

int odr_sequence_begin(ODR o, void *p, int size, const char *name)
{
    char **pp = (char**) p;

    if (o->error)
    	return 0;
    if (o->t_class < 0)
    {
    	o->t_class = ODR_UNIVERSAL;
    	o->t_tag = ODR_SEQUENCE;
    }
    if (o->direction == ODR_DECODE)
    	*pp = 0;
    if (odr_constructed_begin(o, p, o->t_class, o->t_tag, name))
    {
    	if (o->direction == ODR_DECODE && size)
	    *pp = (char *)odr_malloc(o, size);
    	return 1;
    }
    else
    	return 0;
}

int odr_set_begin(ODR o, void *p, int size, const char *name)
{
    char **pp = (char**) p;

    if (o->error)
    	return 0;
    if (o->t_class < 0)
    {
    	o->t_class = ODR_UNIVERSAL;
    	o->t_tag = ODR_SET;
    }
    if (o->direction == ODR_DECODE)
    	*pp = 0;
    if (odr_constructed_begin(o, p, o->t_class, o->t_tag, name))
    {
    	if (o->direction == ODR_DECODE && size)
	    *pp = (char *)odr_malloc(o, size);
    	return 1;
    }
    else
    	return 0;
}

int odr_sequence_end(ODR o)
{
    return odr_constructed_end(o);    
}

int odr_set_end(ODR o)
{
    return odr_constructed_end(o);    
}

static int odr_sequence_more(ODR o)
{
    return odr_constructed_more(o);
}

static int odr_sequence_x (ODR o, Odr_fun type, void *p, int *num)
{
    char ***pp = (char***) p;  /* for dereferencing */
    char **tmp = 0;
    int size = 0, i;

    switch (o->direction)
    {
    	case ODR_DECODE:
	    *num = 0;
	    *pp = (char **)odr_nullval();
	    while (odr_sequence_more(o))
	    {
		/* outgrown array? */
		if (*num * (int) sizeof(void*) >= size)
		{
		    /* double the buffer size */
		    tmp = (char **)odr_malloc(o, sizeof(void*) *
					      (size += size ? size : 128));
		    if (*num)
		    {
			memcpy(tmp, *pp, *num * sizeof(void*));
			/*
			 * For now, we just throw the old *p away, since we use
			 * nibble memory anyway (disgusting, isn't it?).
			 */
		    }
		    *pp = tmp;
		}
		if (!(*type)(o, (*pp) + *num, 0, 0))
		    return 0;
		(*num)++;
	    }
	    break;
    	case ODR_ENCODE: case ODR_PRINT:
#ifdef ODR_DEBUG
	    fprintf(stderr, "[seqof: num=%d]", *num);
#endif
	    for (i = 0; i < *num; i++)
	    {
#ifdef ODR_DEBUG
		fprintf(stderr, "[seqof: elem #%d]", i);
#endif
	    	if (!(*type)(o, *pp + i, 0, 0))
		    return 0;
	    }
	    break;
    	default:
            odr_seterror(o, OOTHER, 47);
	    return 0;
    }
    return odr_sequence_end(o);
}

int odr_set_of(ODR o, Odr_fun type, void *p, int *num, const char *name)
{
    if (!odr_set_begin(o, p, 0, name)) {
	if (o->direction == ODR_DECODE)
	    *num = 0;
    	return 0;
    }
    return odr_sequence_x (o, type, p, num);
}

int odr_sequence_of(ODR o, Odr_fun type, void *p, int *num,
		    const char *name)
{
    if (!odr_sequence_begin(o, p, 0, name)) {
	if (o->direction == ODR_DECODE)
	    *num = 0;
    	return 0;
    }
    return odr_sequence_x (o, type, p, num);
}

