os-workshop

commit 4092b1573f340bed550e20c77bf09e1fb5ad0992
parent b8b0952792447e6754a831e0d8f140e4e261de8d
Author: Brian Swetland <swetland@frotz.net>
Date:   Sat, 21 May 2022 16:26:10 -0700

hw/debug: add vxprintf(fmt, ap)

Diffstat:
M
hw/inc/hw/debug.h
 | 
3
++-
M
hw/src/debug-printf.c
 | 
6
++++++

2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/hw/inc/hw/debug.h b/hw/inc/hw/debug.h
@@ -4,6 +4,7 @@
 #pragma once
 
 #include <stdint.h>
+#include <stdarg.h>
 
 // debug-io.c -- can be replaced with alternate impls
 void xputc(unsigned c);
@@ -12,4 +13,4 @@ int  xgetc(void);
 
 // debug-printf.c -- calls xputs()
 void xprintf(const char* fmt, ...);
-
+void vxprintf(const char* fmt, va_list ap);
diff --git a/hw/src/debug-printf.c b/hw/src/debug-printf.c
@@ -15,3 +15,9 @@ void xprintf(const char* fmt, ...) {
 	xputs(msg);
 }
 
+void vxprintf(const char* fmt, va_list ap) {
+	char msg[128];
+	vsnprintf(msg, sizeof(msg), fmt, ap);
+	xputs(msg);
+}
+