int odr_peektag(ODR o, int *zclass, int *tag, int *cons)
{
if (o->direction != ODR_DECODE)
{
odr_seterror(o, OOTHER, 48);
return 0;
}
if (ODR_STACK_NOT_EMPTY(o) && !odr_constructed_more(o))
return 0;
if (ber_dectag(o->bp, zclass, tag, cons, odr_max(o)) <= 0)
{
odr_seterror(o, OREQUIRED, 49);
return 0;
}
return 1;
}
int odr_write(ODR o, const char *buf, int bytes)
{
if (bytes < 0 || o->op->pos > INT_MAX - bytes)
{
odr_seterror(o, OSPACE, 40);
return -1;
}
if (o->op->pos + bytes >= o->op->size && odr_grow_block(o, bytes))
{
odr_seterror(o, OSPACE, 40);
return -1;
}
memcpy(o->op->buf + o->op->pos, buf, bytes);
o->op->pos += bytes;
if (o->op->pos > o->op->top)
o->op->top = o->op->pos;
return 0;
}
int odr_missing(ODR o, int opt, const char *name)
{
if (o->error)
return 0;
if (!opt)
{
odr_seterror(o, OREQUIRED, 53);
odr_setelement(o, name);
}
return opt;
}
int odr_write(ODR o, unsigned char *buf, int bytes)
{
if (o->pos + bytes >= o->size && odr_grow_block(o, bytes))
{
odr_seterror(o, OSPACE, 40);
return -1;
}
memcpy(o->buf + o->pos, buf, bytes);
o->pos += bytes;
if (o->pos > o->top)
o->top = o->pos;
return 0;
}
int odr_seek(ODR o, int whence, int offset)
{
if (whence == ODR_S_CUR)
offset += o->pos;
else if (whence == ODR_S_END)
offset += o->top;
if (offset > o->size && odr_grow_block(o, offset - o->size))
{
odr_seterror(o, OSPACE, 41);
return -1;
}
o->pos = offset;
return 0;
}
int ber_integer(ODR o, Odr_int *val)
{
int res;
switch (o->direction)
{
case ODR_DECODE:
if ((res = ber_decinteger(o->bp, val, odr_max(o))) <= 0)
{
odr_seterror(o, OPROTO, 50);
return 0;
}
o->bp += res;
return 1;
case ODR_ENCODE:
if ((res = ber_encinteger(o, *val)) < 0)
return 0;
return 1;
case ODR_PRINT:
return 1;
default:
odr_seterror(o, OOTHER, 51); return 0;
}
}
int ber_any(ODR o, Odr_any **p)
{
int res;
switch (o->direction)
{
case ODR_DECODE:
if ((res = completeBER(o->bp, odr_max(o))) <= 0) /* FIX THIS */
{
odr_seterror(o, OPROTO, 2);
return 0;
}
(*p)->buf = (unsigned char *)odr_malloc(o, res);
memcpy((*p)->buf, o->bp, res);
(*p)->len = (*p)->size = res;
o->bp += res;
return 1;
case ODR_ENCODE:
if (odr_write(o, (*p)->buf, (*p)->len) < 0)
return 0;
return 1;
default: odr_seterror(o, OOTHER, 3); return 0;
}
}
int ber_bitstring(ODR o, Odr_bitmask *p, int cons)
{
int res, len;
const char *base;
switch (o->direction)
{
case ODR_DECODE:
if ((res = ber_declen(o->op->bp, &len, odr_max(o))) < 0)
{
odr_seterror(o, OPROTO, 4);
return 0;
}
o->op->bp += res;
if (cons) /* fetch component strings */
{
base = o->op->bp;
while (odp_more_chunks(o, base, len))
if (!odr_bitstring(o, &p, 0, 0))
return 0;
return 1;
}
/* primitive bitstring */
if (len < 0)
{
odr_seterror(o, OOTHER, 5);
return 0;
}
if (len == 0)
return 1;
if (len - 1 > ODR_BITMASK_SIZE)
{
odr_seterror(o, OOTHER, 6);
return 0;
}
if (len > odr_max(o))
{
odr_seterror(o, OOTHER, 7);
return 0;
}
o->op->bp++; /* silently ignore the unused-bits field */
len--;
memcpy(p->bits + p->top + 1, o->op->bp, len);
p->top += len;
o->op->bp += len;
return 1;
case ODR_ENCODE:
if ((res = ber_enclen(o, p->top + 2, 5, 0)) < 0)
return 0;
if (odr_putc(o, 0) < 0) /* no unused bits here */
return 0;
if (p->top < 0)
return 1;
if (odr_write(o, p->bits, p->top + 1) < 0)
return 0;
return 1;
case ODR_PRINT:
return 1;
default:
odr_seterror(o, OOTHER, 8);
return 0;
}
}
