0001-Add-support-for-channels-sharing-the-same-index.patch

From 745887e8484999b89d3983e89e0d53444485736a Mon Sep 17 00:00:00 2001
From: Paul Cercueil <paul.cercueil@analog.com>
Date: Wed, 16 Dec 2015 14:51:05 +0100
Subject: [PATCH] Add support for channels sharing the same index

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
---
 buffer.c | 8 +++++++-
 device.c | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/buffer.c b/buffer.c
index 82ab6c5..4e61f1e 100644
--- a/buffer.c
+++ b/buffer.c
@@ -234,7 +234,9 @@ ssize_t iio_buffer_foreach_sample(struct iio_buffer *buffer,
 					processed += ret;
 			}
 
-			ptr += length;
+			if (i == dev->nb_channels - 1 || dev->channels[
+					i + 1]->index != chn->index)
+				ptr += length;
 		}
 	}
 	return processed;
@@ -267,6 +269,10 @@ void * iio_buffer_first(const struct iio_buffer *buffer,
 		if (!TEST_BIT(buffer->mask, cur->index))
 			continue;
 
+		/* Two channels with the same index use the same samples */
+		if (i > 0 && cur->index == buffer->dev->channels[i - 1]->index)
+			continue;
+
 		if (ptr % len)
 			ptr += len - (ptr % len);
 		ptr += len;
diff --git a/device.c b/device.c
index 53d5832..6f83eb4 100644
--- a/device.c
+++ b/device.c
@@ -449,6 +449,8 @@ ssize_t iio_device_get_sample_size_mask(const struct iio_device *dev,
 			break;
 		if (!TEST_BIT(mask, chn->index))
 			continue;
+		if (i > 0 && chn->index == dev->channels[i - 1]->index)
+			continue;
 
 		if (size % length)
 			size += 2 * length - (size % length);
-- 
2.6.4