From 29f085b7aa27e4df4baa186f06da54e4fed272ab Mon Sep 17 00:00:00 2001
From: Mathieu Maret <mathieu.maret@gmail.com>
Date: Mon, 6 Aug 2018 21:00:58 +0200
Subject: [PATCH] Add va_list

and rename types.h into stdarg.h
---
 core/exception.h           | 2 +-
 core/idt.h                 | 2 +-
 core/interrupt.h           | 2 +-
 core/io.h                  | 2 +-
 core/irq.c                 | 2 +-
 core/klibc.h               | 2 +-
 core/main.c                | 2 +-
 core/mem.h                 | 2 +-
 core/segment.h             | 2 +-
 core/{types.h => stdarg.h} | 5 +++++
 drivers/vga.h              | 2 +-
 11 files changed, 15 insertions(+), 10 deletions(-)
 rename core/{types.h => stdarg.h} (83%)

diff --git a/core/exception.h b/core/exception.h
index 465f752..8ff1c20 100644
--- a/core/exception.h
+++ b/core/exception.h
@@ -1,6 +1,6 @@
 #pragma once
 #include "interrupt.h"
-#include "types.h"
+#include "stdarg.h"
 
 #define EXCEPTION_INTERRUPT_BASE_ADDRESS 0
 
diff --git a/core/idt.h b/core/idt.h
index a87266d..ce8491d 100644
--- a/core/idt.h
+++ b/core/idt.h
@@ -1,5 +1,5 @@
 #pragma once
-#include "types.h"
+#include "stdarg.h"
 
 #define IDT_NUM 256
 
diff --git a/core/interrupt.h b/core/interrupt.h
index 45b7bfc..7edd0bb 100644
--- a/core/interrupt.h
+++ b/core/interrupt.h
@@ -1,5 +1,5 @@
 #pragma once
-#include "types.h"
+#include "stdarg.h"
 
 struct interrupt_frame;
 
diff --git a/core/io.h b/core/io.h
index 9f0a62b..9e7b50a 100644
--- a/core/io.h
+++ b/core/io.h
@@ -1,5 +1,5 @@
 #pragma once
-#include "types.h"
+#include "stdarg.h"
 
 // NIH http://wiki.osdev.org/Inline_Assembly/Examples#I.2FO_access
 static inline void outb(uint16_t port, uint8_t val)
diff --git a/core/irq.c b/core/irq.c
index 09ee6b2..2809f6d 100644
--- a/core/irq.c
+++ b/core/irq.c
@@ -1,7 +1,7 @@
 #include "irq.h"
 #include "idt.h"
 #include "pic.h"
-#include "types.h"
+#include "stdarg.h"
 
 int irqSetup()
 {
diff --git a/core/klibc.h b/core/klibc.h
index 02b3479..fa7011e 100644
--- a/core/klibc.h
+++ b/core/klibc.h
@@ -1,4 +1,4 @@
 #pragma once
-#include "types.h"
+#include "stdarg.h"
 
 void *memcpy(void *dest, const void *src, size_t n );
diff --git a/core/main.c b/core/main.c
index 46d40f9..2aab0d4 100644
--- a/core/main.c
+++ b/core/main.c
@@ -7,7 +7,7 @@
 #include "mem.h"
 #include "multiboot.h"
 #include "pit.h"
-#include "types.h"
+#include "stdarg.h"
 #include "vga.h"
 
 #define CHECK_FLAG(flags,bit)   ((flags) & (1 << (bit)))
diff --git a/core/mem.h b/core/mem.h
index 9cb8069..9d24821 100644
--- a/core/mem.h
+++ b/core/mem.h
@@ -1,5 +1,5 @@
 #pragma once
-#include "types.h"
+#include "stdarg.h"
 
 
 #define PAGE_SHIFT 12
diff --git a/core/segment.h b/core/segment.h
index f5d5961..570464b 100644
--- a/core/segment.h
+++ b/core/segment.h
@@ -29,7 +29,7 @@
  * @see Intel x86 doc, vol 3 chapter 3.
  */
 
-#include "types.h"
+#include "stdarg.h"
 
 /*
  * Global segment selectors (GDT) for SOS/x86.
diff --git a/core/types.h b/core/stdarg.h
similarity index 83%
rename from core/types.h
rename to core/stdarg.h
index f816264..6866c81 100644
--- a/core/types.h
+++ b/core/stdarg.h
@@ -45,3 +45,8 @@ typedef long ssize_t;
 typedef unsigned int size_t;
 typedef int ssize_t;
 #endif
+
+typedef void *va_list;
+#define va_start(v, l) ((v) = (va_list) & (l) + sizeof(l))
+#define va_end(v) ((v) = NULL)
+#define va_arg(v, type) (*(type *)(((v)+=sizeof(type))-sizeof(type)))
diff --git a/drivers/vga.h b/drivers/vga.h
index a488719..6672c53 100644
--- a/drivers/vga.h
+++ b/drivers/vga.h
@@ -1,5 +1,5 @@
 #pragma once
-#include "types.h"
+#include "stdarg.h"
 
 // https://wiki.osdev.org/Text_UI
 #define BLACK   0x00