--- mstools/h/io.h	2018/08/09 18:20:01	1.1.1.1
+++ mstools/h/io.h	2018/08/09 18:21:13	1.1.1.3
@@ -1,7 +1,7 @@
 /***
 *io.h - declarations for low-level file handling and I/O functions
 *
-*	Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
+*	Copyright (c) 1985-1992, Microsoft Corporation. All rights reserved.
 *
 *Purpose:
 *	This file contains the function declarations for the low-level
@@ -11,22 +11,52 @@
 
 #ifndef _INC_IO
 
+#ifndef _POSIX_
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 
-#if (_MSC_VER <= 600)
-#define __cdecl _cdecl
+/*
+ * Conditional macro definition for function calling type and variable type
+ * qualifiers.
+ */
+#if   ( (_MSC_VER >= 800) && (_M_IX86 >= 300) )
+
+/*
+ * Definitions for MS C8-32 (386/486) compiler
+ */
+#define _CRTAPI1 __cdecl
+#define _CRTAPI2 __cdecl
+
+#elif ( _MSC_VER == 600 )
+
+/*
+ * Definitions for old MS C6-386 compiler
+ */
+#define _CRTAPI1 _cdecl
+#define _CRTAPI2 _cdecl
+#define _M_IX86  300
+
+#else
+
+/*
+ * Other compilers (e.g., MIPS)
+ */
+#define _CRTAPI1
+#define _CRTAPI2
+
 #endif
 
+
 #ifndef _TIME_T_DEFINED
 typedef long time_t;		/* time value */
 #define _TIME_T_DEFINED 	/* avoid multiple def's of time_t */
 #endif
 
 #ifndef _FSIZE_T_DEFINED
-typedef unsigned long _fsize_t;     // Could be 64 bits for Win32
+typedef unsigned long _fsize_t; /* Could be 64 bits for Win32 */
 #define _FSIZE_T_DEFINED
 #endif
 
@@ -34,8 +64,8 @@ typedef unsigned long _fsize_t;     // C
 
 struct _finddata_t {
     unsigned	attrib;
-    time_t	time_create;	// -1 for FAT file systems
-    time_t	time_access;	// -1 for FAT file systems
+    time_t	time_create;	/* -1 for FAT file systems */
+    time_t	time_access;	/* -1 for FAT file systems */
     time_t	time_write;
     _fsize_t	size;
     char	name[256];
@@ -56,40 +86,40 @@ struct _finddata_t {
 
 /* function prototypes */
 
-int _access(const char *, int);
-int _chmod(const char *, int);
-int _chsize(int, long);
-int _close(int);
-int _commit(int);
-int _creat(const char *, int);
-int _dup(int);
-int _dup2(int, int);
-int _eof(int);
-long _filelength(int);
-int _isatty(int);
-int _locking(int, int, long);
-long _lseek(int, long, int);
-char * _mktemp(char *);
-int _open(const char *, int, ...);
-int _pipe(int *, unsigned int, int);
-int _read(int, void *, unsigned int);
-int remove(const char *);
-int rename(const char *, const char *);
-int _setmode(int, int);
-int _sopen(const char *, int, int, ...);
-long _tell(int);
-int _umask(int);
-int _unlink(const char *);
-int _write(int, const void *, unsigned int);
-long _findfirst(char *, struct _finddata_t *);
-int _findnext(long, struct _finddata_t *);
-int _findclose(long);
+int _CRTAPI1 _access(const char *, int);
+int _CRTAPI1 _chmod(const char *, int);
+int _CRTAPI1 _chsize(int, long);
+int _CRTAPI1 _close(int);
+int _CRTAPI1 _commit(int);
+int _CRTAPI1 _creat(const char *, int);
+int _CRTAPI1 _dup(int);
+int _CRTAPI1 _dup2(int, int);
+int _CRTAPI1 _eof(int);
+long _CRTAPI1 _filelength(int);
+long _CRTAPI1 _findfirst(char *, struct _finddata_t *);
+int _CRTAPI1 _findnext(long, struct _finddata_t *);
+int _CRTAPI1 _findclose(long);
+int _CRTAPI1 _isatty(int);
+int _CRTAPI1 _locking(int, int, long);
+long _CRTAPI1 _lseek(int, long, int);
+char * _CRTAPI1 _mktemp(char *);
+int _CRTAPI2 _open(const char *, int, ...);
+int _CRTAPI1 _pipe(int *, unsigned int, int);
+int _CRTAPI1 _read(int, void *, unsigned int);
+int _CRTAPI1 remove(const char *);
+int _CRTAPI1 rename(const char *, const char *);
+int _CRTAPI1 _setmode(int, int);
+int _CRTAPI2 _sopen(const char *, int, int, ...);
+long _CRTAPI1 _tell(int);
+int _CRTAPI1 _umask(int);
+int _CRTAPI1 _unlink(const char *);
+int _CRTAPI1 _write(int, const void *, unsigned int);
 
 
-long _get_osfhandle(int);
-int _open_osfhandle(long, int);
+long _CRTAPI1 _get_osfhandle(int);
+int _CRTAPI1 _open_osfhandle(long, int);
 
-#if !__STDC__
+#if !(__STDC__ || defined(__cplusplus))
 /* Non-ANSI names for compatibility */
 #define access	   _access
 #define chmod	   _chmod
@@ -118,5 +148,8 @@ int _open_osfhandle(long, int);
 }
 #endif
 
+
+#endif	/* _POSIX_ */
+
 #define _INC_IO
 #endif	/* _INC_IO */