From 37173ab394082a5102d04f78ca1b920a9f34b265 Mon Sep 17 00:00:00 2001
From: "H. Peter Anvin" <hpa@zytor.com>
Date: Mon, 14 Jul 2008 12:43:50 -0700
Subject: [PATCH] getc: add "readc" function to do block reads

Add "readc" function to do block reads.  Currently it just does a loop
around "call getc/stosb".
---
 core/getc.inc | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/core/getc.inc b/core/getc.inc
index b36115c..ec8dab2 100644
--- a/core/getc.inc
+++ b/core/getc.inc
@@ -151,6 +151,26 @@ getc:
 		stc
 		jmp .ret
 
+;
+; This is similar to getc, except that we read up to CX bytes and
+; store them in ES:DI.  Eventually this could get optimized...
+;
+; On return, CX and DI are adjusted by the number of bytes actually read.
+;
+readc:
+		push ax
+.loop:
+		call getc
+		jc .out
+		stosb
+		loop .loop
+.out:
+		pop ax
+		ret
+
+;
+; close: close the top of the getc stack
+;
 close:
 		push bx
 		push si
-- 
2.7.4