moffset(struct magic_set *ms, struct magic *m, const struct buffer *b,
    int32_t *op)
{
	size_t nbytes = b->flen;
	int32_t o;

  	switch (m->type) {
  	case FILE_BYTE:
		o = CAST(int32_t, (ms->offset + sizeof(char)));
		break;

  	case FILE_SHORT:
  	case FILE_BESHORT:
  	case FILE_LESHORT:
		o = CAST(int32_t, (ms->offset + sizeof(short)));
		break;

  	case FILE_LONG:
  	case FILE_BELONG:
  	case FILE_LELONG:
  	case FILE_MELONG:
		o = CAST(int32_t, (ms->offset + sizeof(int32_t)));
		break;

  	case FILE_QUAD:
  	case FILE_BEQUAD:
  	case FILE_LEQUAD:
		o = CAST(int32_t, (ms->offset + sizeof(int64_t)));
		break;

  	case FILE_STRING:
  	case FILE_PSTRING:
  	case FILE_BESTRING16:
  	case FILE_LESTRING16:
		if (m->reln == '=' || m->reln == '!') {
			o = ms->offset + m->vallen;
		} else {
			union VALUETYPE *p = &ms->ms_value;

			if (*m->value.s == '\0')
				p->s[strcspn(p->s, "\r\n")] = '\0';
			o = CAST(uint32_t, (ms->offset + strlen(p->s)));
			if (m->type == FILE_PSTRING) {
				size_t l = file_pstring_length_size(ms, m);
				if (l == FILE_BADSIZE)
					return -1;
				o += CAST(uint32_t, l);
			}
		}
		break;

	case FILE_DATE:
	case FILE_BEDATE:
	case FILE_LEDATE:
	case FILE_MEDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint32_t)));
		break;

	case FILE_LDATE:
	case FILE_BELDATE:
	case FILE_LELDATE:
	case FILE_MELDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint32_t)));
		break;

	case FILE_QDATE:
	case FILE_BEQDATE:
	case FILE_LEQDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint64_t)));
		break;

	case FILE_QLDATE:
	case FILE_BEQLDATE:
	case FILE_LEQLDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint64_t)));
		break;

  	case FILE_FLOAT:
  	case FILE_BEFLOAT:
  	case FILE_LEFLOAT:
		o = CAST(int32_t, (ms->offset + sizeof(float)));
		break;

  	case FILE_DOUBLE:
  	case FILE_BEDOUBLE:
  	case FILE_LEDOUBLE:
		o = CAST(int32_t, (ms->offset + sizeof(double)));
		break;

	case FILE_REGEX:
		if ((m->str_flags & REGEX_OFFSET_START) != 0)
			o = CAST(int32_t, ms->search.offset);
		else
			o = CAST(int32_t,
			    (ms->search.offset + ms->search.rm_len));
		break;

	case FILE_SEARCH:
		if ((m->str_flags & REGEX_OFFSET_START) != 0)
			o = CAST(int32_t, ms->search.offset);
		else
			o = CAST(int32_t, (ms->search.offset + m->vallen));
		break;

	case FILE_CLEAR:
	case FILE_DEFAULT:
	case FILE_INDIRECT:
	case FILE_OFFSET:
	case FILE_USE:
		o = ms->offset;
		break;

	case FILE_DER:
		o = der_offs(ms, m, nbytes);
		if (o == -1 || CAST(size_t, o) > nbytes) {
			if ((ms->flags & MAGIC_DEBUG) != 0) {
				(void)fprintf(stderr,
				    "Bad DER offset %d nbytes=%"
				    SIZE_T_FORMAT "u", o, nbytes);
			}
			*op = 0;
			return 0;
		}
		break;

	case FILE_GUID:
		o = CAST(int32_t, (ms->offset + 2 * sizeof(uint64_t)));
		break;

	default:
		o = 0;
		break;
	}

	if (CAST(size_t, o) > nbytes) {
#if 0
		file_error(ms, 0, "Offset out of range %" SIZE_T_FORMAT
		    "u > %" SIZE_T_FORMAT "u", (size_t)o, nbytes);
#endif
		return -1;
	}
	*op = o;
	return 1;
}
moffset(struct magic_set *ms, struct magic *m, const struct buffer *b,
    int32_t *op)
{
	size_t nbytes = b->flen;
	int32_t o;

  	switch (m->type) {
  	case FILE_BYTE:
		o = CAST(int32_t, (ms->offset + sizeof(char)));
		break;

  	case FILE_SHORT:
  	case FILE_BESHORT:
  	case FILE_LESHORT:
		o = CAST(int32_t, (ms->offset + sizeof(short)));
		break;

  	case FILE_LONG:
  	case FILE_BELONG:
  	case FILE_LELONG:
  	case FILE_MELONG:
		o = CAST(int32_t, (ms->offset + sizeof(int32_t)));
		break;

  	case FILE_QUAD:
  	case FILE_BEQUAD:
  	case FILE_LEQUAD:
		o = CAST(int32_t, (ms->offset + sizeof(int64_t)));
		break;

  	case FILE_STRING:
  	case FILE_PSTRING:
  	case FILE_BESTRING16:
  	case FILE_LESTRING16:
		if (m->reln == '=' || m->reln == '!') {
			o = ms->offset + m->vallen;
		} else {
			union VALUETYPE *p = &ms->ms_value;

			if (*m->value.s == '\0')
				p->s[strcspn(p->s, "\r\n")] = '\0';
			o = CAST(uint32_t, (ms->offset + strlen(p->s)));
			if (m->type == FILE_PSTRING) {
				size_t l = file_pstring_length_size(ms, m);
				if (l == FILE_BADSIZE)
					return -1;
				o += CAST(uint32_t, l);
			}
		}
		break;

	case FILE_DATE:
	case FILE_BEDATE:
	case FILE_LEDATE:
	case FILE_MEDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint32_t)));
		break;

	case FILE_LDATE:
	case FILE_BELDATE:
	case FILE_LELDATE:
	case FILE_MELDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint32_t)));
		break;

	case FILE_QDATE:
	case FILE_BEQDATE:
	case FILE_LEQDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint64_t)));
		break;

	case FILE_QLDATE:
	case FILE_BEQLDATE:
	case FILE_LEQLDATE:
		o = CAST(int32_t, (ms->offset + sizeof(uint64_t)));
		break;

  	case FILE_FLOAT:
  	case FILE_BEFLOAT:
  	case FILE_LEFLOAT:
		o = CAST(int32_t, (ms->offset + sizeof(float)));
		break;

  	case FILE_DOUBLE:
  	case FILE_BEDOUBLE:
  	case FILE_LEDOUBLE:
		o = CAST(int32_t, (ms->offset + sizeof(double)));
		break;

	case FILE_REGEX:
		if ((m->str_flags & REGEX_OFFSET_START) != 0)
			o = CAST(int32_t, ms->search.offset);
		else
			o = CAST(int32_t,
			    (ms->search.offset + ms->search.rm_len));
		break;

	case FILE_SEARCH:
		if ((m->str_flags & REGEX_OFFSET_START) != 0)
			o = CAST(int32_t, ms->search.offset);
		else
			o = CAST(int32_t, (ms->search.offset + m->vallen));
		break;

	case FILE_CLEAR:
	case FILE_DEFAULT:
	case FILE_INDIRECT:
	case FILE_OFFSET:
	case FILE_USE:
		o = ms->offset;
		break;

	case FILE_DER:
		o = der_offs(ms, m, nbytes);
		if (o == -1 || CAST(size_t, o) > nbytes) {
			if ((ms->flags & MAGIC_DEBUG) != 0) {
				(void)fprintf(stderr,
				    "Bad DER offset %d nbytes=%"
				    SIZE_T_FORMAT "u", o, nbytes);
			}
			*op = 0;
			return 0;
		}
		break;

	case FILE_GUID:
		o = CAST(int32_t, (ms->offset + 2 * sizeof(uint64_t)));
		break;

	default:
		o = 0;
		break;
	}

	if (CAST(size_t, o) > nbytes) {
#if 0
		file_error(ms, 0, "Offset out of range %" SIZE_T_FORMAT
		    "u > %" SIZE_T_FORMAT "u", (size_t)o, nbytes);
#endif
		return -1;
	}
	*op = o;
	return 1;
}