C++ (Cpp) drange_node_get_start_offset Examples

Example #1

File: semcheck.c Project: RazZziel/wireshark-dplay

static void
check_drange_node_sanity(gpointer data, gpointer user_data)
{
	drange_node*		drnode = data;
	struct check_drange_sanity_args *args = user_data;
	gint			start_offset, end_offset, length;
	header_field_info	*hfinfo;

	switch (drange_node_get_ending(drnode)) {

	case LENGTH:
		length = drange_node_get_length(drnode);
		if (length <= 0) {
			if (!args->err) {
				args->err = TRUE;
				start_offset = drange_node_get_start_offset(drnode);
				hfinfo = sttype_range_hfinfo(args->st);
				dfilter_fail("Range %d:%d specified for \"%s\" isn't valid, "
					"as length %d isn't positive",
					start_offset, length,
					hfinfo->abbrev,
					length);
			}
		}
		break;

	case OFFSET:
		/*
		 * Make sure the start offset isn't beyond the end
		 * offset.  This applies to negative offsets too.
		 */

		/* XXX - [-ve - +ve] is probably pathological, but isn't
		 * disallowed.
		 * [+ve - -ve] is probably pathological too, and happens to be
		 * disallowed.
		 */
		start_offset = drange_node_get_start_offset(drnode);
		end_offset = drange_node_get_end_offset(drnode);
		if (start_offset > end_offset) {
			if (!args->err) {
				args->err = TRUE;
				hfinfo = sttype_range_hfinfo(args->st);
				dfilter_fail("Range %d-%d specified for \"%s\" isn't valid, "
					"as %d is greater than %d",
					start_offset, end_offset,
					hfinfo->abbrev,
					start_offset, end_offset);
			}
		}
		break;

	case TO_THE_END:
		break;

	case UNINITIALIZED:
	default:
		g_assert_not_reached();
	}
}

Example #2

File: ftypes.c Project: flaub/HotFuzz

static void
slice_func(gpointer data, gpointer user_data)
{
	drange_node	*drnode = data;
	slice_data_t	*slice_data = user_data;
	gint		start_offset;
	gint		length = 0;
	gint		end_offset = 0;
	guint		field_length;
	fvalue_t	*fv;
	drange_node_end_t	ending;

	if (slice_data->slice_failure) {
		return;
	}

	start_offset = drange_node_get_start_offset(drnode);
	ending = drange_node_get_ending(drnode);

	fv = slice_data->fv;
	field_length = fvalue_length(fv);

	/* Check for negative start */
	if (start_offset < 0) {
		start_offset = field_length + start_offset;
		if (start_offset < 0) {
			slice_data->slice_failure = TRUE;
			return;
		}
	}

	/* Check the end type and set the length */

	if (ending == DRANGE_NODE_END_T_TO_THE_END) {
		length = field_length - start_offset;
		if (length <= 0) {
			slice_data->slice_failure = TRUE;
			return;
		}
	}
	else if (ending == DRANGE_NODE_END_T_LENGTH) {
		length = drange_node_get_length(drnode);
		if (start_offset + length > (int) field_length) {
			slice_data->slice_failure = TRUE;
			return;
		}
	}
	else if (ending == DRANGE_NODE_END_T_OFFSET) {
		end_offset = drange_node_get_end_offset(drnode);
		if (end_offset < 0) {
			end_offset = field_length + end_offset;
			if (end_offset < start_offset) {
				slice_data->slice_failure = TRUE;
				return;
			}
		} else if (end_offset >= (int) field_length) {
			slice_data->slice_failure = TRUE;
			return;
		}
		length = end_offset - start_offset + 1;
	}
	else {
		g_assert_not_reached();
	}

	g_assert(start_offset >=0 && length > 0);
	fv->ftype->slice(fv, slice_data->bytes, start_offset, length);
}