Update stdarg.h.

CE-Programming · Feb 16, 2020 · 2a21662 · 2a21662
1 parent 7f05cf3
commit 2a21662
Showing 1 changed file with 19 additions and 12 deletions.
diff --git a/src/std/stdarg.h b/src/std/stdarg.h
@@ -1,15 +1,22 @@
-/*
- *  Copyright (C) 1999-2008 by  Zilog, Inc.
- *  All Rights Reserved
- */
-#ifndef STDARG_H
-#define STDARG_H
+#ifndef _STDARG_H
+#define _STDARG_H
 
-typedef char * va_list;
-#define _INTSIZEOF(n) (sizeof(n) + sizeof(int)-1-((sizeof(n)-1)%sizeof(int)))
+#ifndef __GNUC_VA_LIST
+#define __GNUC_VA_LIST
+typedef __builtin_va_list __gnuc_va_list;
+#endif /* __GNUC_VA_LIST */
 
-#define va_start(ap, parm) (ap = (char *)&parm + _INTSIZEOF(parm))
-#define va_arg(ap,type)    (*(type *)((ap += _INTSIZEOF(type)) - _INTSIZEOF(type)))
-#define va_end(ap)
+#ifndef _VA_LIST
+#define _VA_LIST
+typedef __builtin_va_list va_list;
+#endif /* _VA_LIST */
 
-#endif
+#define va_start(ap, param)  __builtin_va_start(ap, param)
+#define va_end(ap)           __builtin_va_end(ap)
+#define va_arg(ap, type)     __builtin_va_arg(ap, type)
+#define __va_copy(dest, src) __builtin_va_copy(dest, src)
+#if __STDC_VERSION__ >= 199901L || __cplusplus >= 201103L
+# define va_copy(dest, src)   __builtin_va_copy(dest, src)
+#endif /* __STDC_VERSION__ >= 199901L || __cplusplus >= 201103L */
+
+#endif /* _STDARG_H */