Obsolete code removal

src/include/gpxe/buffer.h

@@ -1,106 +0,0 @@
-#ifndef _GPXE_BUFFER_H
-#define _GPXE_BUFFER_H
-
-#include <stdint.h>
-#include <errno.h>
-#include <gpxe/uaccess.h>
-
-/** @file
- *
- * Buffers for loading files.
- *
- * This file provides routines for filling a buffer with data received
- * piecemeal, where the size of the data is not necessarily known in
- * advance.
- *
- * Some protocols do not provide a mechanism for us to know the size
- * of the file before we happen to receive a particular block
- * (e.g. the final block in an MTFTP transfer).  In addition, some
- * protocols (e.g. the multicast protocols) can, in theory, provide
- * the data in any order.
- *
- * Example usage:
- *
- * @code
- *
- *   struct buffer my_buffer;
- *   void *data;
- *   off_t offset;
- *   size_t len;
- *   
- *   // We have an area of memory [buf_start,buf_start+len) into which to
- *   // load a file, where buf_start is a userptr_t.
- *   memset ( &buffer, 0, sizeof ( buffer ) );
- *   buffer->start = buf_start;
- *   buffer->len = len;
- *   ...
- *   while ( get_file_block ( ... ) ) {
- *     // Downloaded block is stored in [data,data+len), and represents 
- *     // the portion of the file at offsets [offset,offset+len)
- *     if ( fill_buffer ( &buffer, data, offset, len ) != 0 ) {
- *       // An error occurred
- *     }
- *     ...
- *   }
- *   ...
- *   // The whole file is now present at [buf_start,buf_start+filesize),
- *   // where buf_start is a userptr_t.  The struct buffer can simply
- *   // be discarded.
- *
- * @endcode
- *
- */
-
-/**
- * A data buffer
- *
- * A buffer looks something like this:
- *
- * @code
- *
- *     XXXXXXXXXXXXXXXXX.........XXX..........XXXXXXX........XXXXXX.........
- *
- *     ^
- *     |
- *   start
- *
- *     <----- fill ---->
- *
- *     <------------------------ free ---------------------------->
- *
- *     <------------------------------ len -------------------------------->
- *
- * @endcode
- *
- * #start and #len denote the real boundaries of the buffer.  #fill
- * denotes the offset to the first free block in the buffer.  (If the
- * buffer is full, #fill, #free and #len will all be equal.)
- *
- */
-struct buffer {
-	/** Start of buffer */
-	userptr_t addr;
-	/** Total length of buffer */
-	size_t len;
-	/** Offset to first free block within buffer */
-	size_t fill;
-	/** Offset to last free block within buffer */
-	size_t free;
-	/** Expand data buffer
-	 *
-	 * @v buffer		Data buffer
-	 * @v new_len		New length
-	 * @ret rc		Return status code
-	 *
-	 * Expand the data buffer to accommodate more data.  This
-	 * method is optional; if it is @c NULL then the buffer will
-	 * not be expandable.
-	 */
-	int ( * expand ) ( struct buffer *buffer, size_t new_len );
-};
-
-extern int fill_buffer ( struct buffer *buffer, const void *data,
-			 size_t offset, size_t len );
-extern int expand_buffer ( struct buffer *buffer, size_t new_len );
-
-#endif /* _GPXE_BUFFER_H */