Use struct buffer in gdb_readline_no_editing

gdb/ChangeLog:
2016-03-09  Pedro Alves  <palves@redhat.com>

	* common/buffer.h (buffer_grow_char): New function.
	* top.c: Include buffer.h.
	(gdb_readline_no_editing): Rename 'prompt_arg' parameter to
	'prompt'.  Use struct buffer instead of xrealloc.

1 files changed, 9 insertions, 0 deletions

diff --git a/gdb/common/buffer.h b/gdb/common/buffer.h
index 2a47db4..8122a2c 100644
--- a/gdb/common/buffer.h
+++ b/gdb/common/buffer.h
@@ -31,6 +31,15 @@ struct buffer
    accommodate the new data.  */
 void buffer_grow (struct buffer *buffer, const char *data, size_t size);
 
+/* Append C to the end of BUFFER.  Grows the buffer to accommodate the
+   new data.  */
+
+static inline void
+buffer_grow_char (struct buffer *buffer, char c)
+{
+  buffer_grow (buffer, &c, 1);
+}
+
 /* Release any memory held by BUFFER.  */
 void buffer_free (struct buffer *buffer);