[linebuf] Support buffering of multiple lines

Allow line buffer to accumulate multiple lines, with buffered_line()
returning each freshly-completed line as it is encountered.  This
allows buffered lines to be subsequently processed as a group.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

1 files changed, 6 insertions, 6 deletions

diff --git a/src/include/ipxe/linebuf.h b/src/include/ipxe/linebuf.h
index a1d56bbf5..630278a04 100644
--- a/src/include/ipxe/linebuf.h
+++ b/src/include/ipxe/linebuf.h
@@ -14,17 +14,17 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
 
 /** A line buffer */
 struct line_buffer {
-	/** Current string in the buffer */
+	/** Data buffer */
 	char *data;
-	/** Length of current string, excluding the terminating NUL */
+	/** Length of buffered data */
 	size_t len;
-	/** String is ready to read */
-	int ready;
+	/** Most recently consumed length */
+	size_t consumed;
 };
 
 extern char * buffered_line ( struct line_buffer *linebuf );
-extern ssize_t line_buffer ( struct line_buffer *linebuf,
-			     const char *data, size_t len );
+extern int line_buffer ( struct line_buffer *linebuf,
+			 const char *data, size_t len );
 extern void empty_line_buffer ( struct line_buffer *linebuf );
 
 #endif /* _IPXE_LINEBUF_H */