Move scan_block functions into iio.h

scan_block functions we originally required by MATLAB but these are
generally handy in other applications. Moving into the main header.

This eliminates the iio-wrapper.h file, as it is not needed anymore.
Users who want to use this in MATLAB will need to add:
before they include iio.h

Signed-off-by: Travis F. Collins <[email protected]>
Signed-off-by: Robin Getz <[email protected]>

iio.h

@@ -90,6 +90,7 @@ struct iio_buffer;
 
 struct iio_context_info;
 struct iio_scan_context;
+struct iio_scan_block;
 
 /**
  * @enum iio_chan_type
@@ -253,6 +254,42 @@ __api __check_ret __pure const char * iio_context_info_get_uri(
 		const struct iio_context_info *info);
 
 
+/** @brief Create a scan block
+ * @param backend A NULL-terminated string containing the backend to use for
+ * scanning. If NULL, all the available backends are used.
+ * @param flags Unused for now. Set to 0.
+ * @return on success, a pointer to a iio_scan_block structure
+ * @return On failure, NULL is returned and errno is set appropriately */
+__api struct iio_scan_block * iio_create_scan_block(
+		const char *backend, unsigned int flags);
+
+
+/** @brief Destroy the given scan block
+ * @param ctx A pointer to an iio_scan_block structure
+ *
+ * <b>NOTE:</b> After that function, the iio_scan_block pointer shall be invalid. */
+__api void iio_scan_block_destroy(struct iio_scan_block *blk);
+
+
+/** @brief Enumerate available contexts via scan block
+ * @param blk A pointer to a iio_scan_block structure.
+ * @returns On success, the number of contexts found.
+ * @returns On failure, a negative error number.
+ */
+__api ssize_t iio_scan_block_scan(struct iio_scan_block *blk);
+
+
+/** @brief Get the iio_context_info for a particular context
+ * @param blk A pointer to an iio_scan_block structure
+ * @param index The index corresponding to the context.
+ * @return A pointer to the iio_context_info for the context
+ * @returns On success, a pointer to the specified iio_context_info
+ * @returns On failure, NULL is returned and errno is set appropriately
+ */
+__api struct iio_context_info *iio_scan_block_get_info(
+		struct iio_scan_block *blk, unsigned int index);
+
+
 /** @} *//* ------------------------------------------------------------------*/
 /* ------------------------- Top-level functions -----------------------------*/
 /** @defgroup TopLevel Top-level functions