source: trunk/gsdl/packages/yaz/odr/ber_oid.c@ 1343

/*
 * Copyright (c) 1995-2000, Index Data
 * See the file LICENSE for details.
 * Sebastian Hammer, Adam Dickmeiss
 *
 * $Log$
 * Revision 1.1  2000/08/03 03:11:16  johnmcp
 * Added the YAZ toolkit source to the packages directory (for z39.50 stuff)
 *
 * Revision 1.12  2000/02/29 13:44:55  adam
 * Check for config.h (currently not generated).
 *
 * Revision 1.11  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 1.10  1999/11/30 13:47:11  adam
 * Improved installation. Moved header files to include/yaz.
 *
 * Revision 1.9  1995/09/29 17:12:19  quinn
 * Smallish
 *
 * Revision 1.8  1995/09/27  15:02:56  quinn
 * Modified function heads & prototypes.
 *
 * Revision 1.7  1995/05/16  08:50:47  quinn
 * License, documentation, and memory fixes
 *
 * Revision 1.6  1995/04/18  08:15:18  quinn
 * Added dynamic memory allocation on encoding (whew). Code is now somewhat
 * neater. We'll make the same change for decoding one day.
 *
 * Revision 1.5  1995/03/20  12:18:22  quinn
 * Fixed bug in ber_oid
 *
 * Revision 1.4  1995/03/08  12:12:11  quinn
 * Added better error checking.
 *
 * Revision 1.3  1995/03/01  08:40:56  quinn
 * Smallish changes.
 *
 * Revision 1.2  1995/02/14  20:39:55  quinn
 * Fixed bugs in completeBER and (serious one in) ber_oid.
 *
 * Revision 1.1  1995/02/03  17:04:36  quinn
 * Initial revision
 *
 */
#if HAVE_CONFIG_H
#include <config.h>
#endif

#include <yaz/odr.h>

int ber_oidc(ODR o, Odr_oid *p)
{
    int len, lenp, end;
    int pos, n, res, id;
    unsigned char octs[8];

    switch (o->direction)
    {
    case ODR_DECODE:
        if ((res = ber_declen(o->bp, &len)) < 1)
        {
            o->error = OPROTO;
            return 0;
        }
        if (len < 0)
        {
            o->error = OPROTO;
            return 0;
        }
        o->bp += res;
        if (len == 0)
        {
            *p = -1;
            return 1;
        }
        p[0] = *o->bp / 40;
        if (p[0] > 2)
            p[0] = 2;
        p[1] = *o->bp - p[0] * 40;
        o->bp++;
        pos = 2;
        len--;
        while (len)
        {
            p[pos] = 0;
            do
            {
            if (!len)
            {
                o->error = OPROTO;
                return 0;
            }
            p[pos] <<= 7;
            p[pos] |= *o->bp & 0X7F;
            len--;
        }
        while (*(o->bp++) & 0X80);
        pos++;
        }
        p[pos] = -1;
        return 1;
        case ODR_ENCODE:
        /* we'll allow ourselves the quiet luxury of only doing encodings
               shorter than 127 */
            lenp = odr_tell(o);
        if (odr_putc(o, 0) < 0)   /* dummy */
            return 0;
            if (p[0] < 0 && p[1] <= 0)
        {
            o->error = ODATA;
                return 0;
        }
        for (pos = 1; p[pos] >= 0; pos++)
        {
            id = pos > 1 ? p[pos] : p[0] * 40 + p[1];
            n = 0;
            do
            {
            octs[n++] = id & 0X7F;
            id >>= 7;
        }
        while (id);
        while (n--)
        {
            unsigned char p;

            p = octs[n] | ((n > 0) << 7);
            if (odr_putc(o, p) < 0)
                return 0;
        }
        }
        end = odr_tell(o);
        odr_seek(o, ODR_S_SET, lenp);
        if (ber_enclen(o, (end - lenp) - 1, 1, 1) != 1)
        {
            o->error = OOTHER;
            return 0;
        }
        odr_seek(o, ODR_S_END, 0);
        return 1;
        default: o->error = OOTHER; return 0;
    }
}