Enhance iio_context_find_device() to use labels

Make iio_context_find_device() able to search not only by ID and name,
but also by label.

Signed-off-by: Paul Cercueil <[email protected]>

context.c

@@ -232,7 +232,8 @@ struct iio_device * iio_context_find_device(const struct iio_context *ctx,
 	for (i = 0; i < ctx->nb_devices; i++) {
 		struct iio_device *dev = ctx->devices[i];
 		if (!strcmp(dev->id, name) ||
-				(dev->name && !strcmp(dev->name, name)))
+		    (dev->label && !strcmp(dev->label, name)) ||
+		    (dev->name && !strcmp(dev->name, name)))
 			return dev;
 	}
 	return NULL;

iio.h

@@ -541,13 +541,13 @@ __api __check_ret __pure struct iio_device * iio_context_get_device(
 		const struct iio_context *ctx, unsigned int index);
 
 
-/** @brief Try to find a device structure by its name of ID
+/** @brief Try to find a device structure by its ID, label or name
  * @param ctx A pointer to an iio_context structure
- * @param name A NULL-terminated string corresponding to the name or the ID of
- * the device to search for
+ * @param name A NULL-terminated string corresponding to the ID, label or name
+ * of the device to search for
  * @return On success, a pointer to an iio_device structure
- * @return If the name or ID does not correspond to any known device, NULL is
- * returned */
+ * @return If the parameter does not correspond to the ID, label or name of
+ * any known device, NULL is returned */
 __api __check_ret __pure struct iio_device * iio_context_find_device(
 		const struct iio_context *ctx, const char *name);