source: main/tags/2.25a/gsdl/packages/yaz/odr/odr_seq.c@ 21893

/*
 * Copyright (c) 1995-2000, Index Data
 * See the file LICENSE for details.
 * Sebastian Hammer, Adam Dickmeiss
 *
 * $Log$
 * Revision 1.1  2000/08/03 03:11:24  johnmcp
 * Added the YAZ toolkit source to the packages directory (for z39.50 stuff)
 *
 * Revision 1.27  2000/02/29 13:44:55  adam
 * Check for config.h (currently not generated).
 *
 * Revision 1.26  2000/01/31 13:15:21  adam
 * Removed uses of assert(3). Cleanup of ODR. CCL parser update so
 * that some characters are not surrounded by spaces in resulting term.
 * ILL-code updates.
 *
 * Revision 1.25  1999/11/30 13:47:11  adam
 * Improved installation. Moved header files to include/yaz.
 *
 * Revision 1.24  1999/04/20 09:56:48  adam
 * Added 'name' paramter to encoder/decoder routines (typedef Odr_fun).
 * Modified all encoders/decoders to reflect this change.
 *
 * Revision 1.23  1998/03/20 14:45:01  adam
 * Implemented odr_enum and odr_set_of.
 *
 * Revision 1.22  1998/02/11 11:53:34  adam
 * Changed code so that it compiles as C++.
 *
 * Revision 1.21  1997/11/24 11:33:56  adam
 * Using function odr_nullval() instead of global ODR_NULLVAL when
 * appropriate.
 *
 * Revision 1.20  1997/09/29 07:17:31  adam
 * Added typecast to avoid warnings on MSVC.
 *
 * Revision 1.19  1997/06/23 10:31:11  adam
 * Added RVDM's SEQUENCE OF patch again!
 *
 * Revision 1.18  1997/05/14 06:53:58  adam
 * C++ support.
 *
 * Revision 1.17  1997/05/05 11:21:09  adam
 * In handling of SEQUENCE OF: Counter set to zero when SEQUENCE
 * OF isn't there at all.
 *
 * Revision 1.16  1995/09/29 17:12:26  quinn
 * Smallish
 *
 * Revision 1.15  1995/09/27  15:03:00  quinn
 * Modified function heads & prototypes.
 *
 * Revision 1.14  1995/08/15  11:16:39  quinn
 * Fixed pretty-printers.
 *
 * Revision 1.13  1995/05/22  14:56:57  quinn
 * Fixed problem in decoding empty sequence.
 *
 * Revision 1.12  1995/05/18  13:06:32  quinn
 * Smallish.
 *
 * Revision 1.11  1995/05/17  08:41:54  quinn
 * Small, hopefully insignificant change.
 *
 * Revision 1.10  1995/05/16  08:50:59  quinn
 * License, documentation, and memory fixes
 *
 * Revision 1.9  1995/03/17  10:17:57  quinn
 * Added memory management.
 *
 * Revision 1.8  1995/03/15  11:18:05  quinn
 * Fixed serious bug in odr_cons
 *
 * Revision 1.7  1995/03/08  12:12:30  quinn
 * Added better error checking.
 *
 * Revision 1.6  1995/02/10  15:55:29  quinn
 * Bug fixes, mostly.
 *
 * Revision 1.5  1995/02/09  15:51:49  quinn
 * Works better now.
 *
 * Revision 1.4  1995/02/07  17:53:00  quinn
 * A damn mess, but now things work, I think.
 *
 * Revision 1.3  1995/02/07  14:13:46  quinn
 * Bug fixes.
 *
 * Revision 1.2  1995/02/06  16:45:03  quinn
 * Small mods.
 *
 * Revision 1.1  1995/02/02  16:21:54  quinn
 * First kick.
 *
 */

#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <yaz/odr.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:
        o->error = OOTHER;
        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);
}