add directory Minix

Minix/1.7.5/DOSUTILS/FIPS/SOURCE/HOST_OS.CPP

@@ -0,0 +1,114 @@
+// host_os.cpp	host operating system classes
+//		dave mccaldon (d.mccalden@staffordshire.ac.uk)
+
+#include "host_os.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dos.h>
+
+char *msdos_info (void)
+{
+	return ("MS-DOS version %d.%d");
+};
+
+char *dosemu_info (void)
+{
+	return ("Linux dosemu version %d.%d");
+};
+
+char *mswindows_info (void)
+{
+	return ("MS-Windows version %d.%d");
+};
+
+char *desqview_info (void)
+{
+	return ("Desq-View version %d.%d");
+};
+
+host_os::host_os (void)
+{
+	status = NOT_OK;
+	if (mswindows_detect () == true) format = mswindows_info;
+//	else if (dosemu_detect () == true) format = dosemu_info;
+	else if (desqview_detect () == true) format = desqview_info;
+	else
+	{
+		status = OK;
+		msdos_version ();
+		format = msdos_info;
+	}
+}
+
+
+char *host_os::information( char *p )
+{
+	if( p == NULL )
+		p = (char *) malloc( strlen( format() ) + 12 );
+	sprintf( p, format(), ver_major, ver_minor );
+
+	return p;
+}
+
+void host_os::msdos_version()
+{
+	ver_major = _osmajor;			// borlandc constants
+	ver_minor = _osminor;
+}
+
+boolean host_os::mswindows_detect()
+{
+	union   REGS r;
+
+	r.x.ax = 0x1600;
+	int86( 0x2F, &r, &r );
+	if( r.h.al & 0x7F )
+	{
+		ver_major = r.h.al;
+		ver_minor = r.h.ah;
+		return (true);
+	}
+
+	return (false);
+}
+
+boolean host_os::dosemu_detect()
+{
+	union   REGS r;
+
+	// this is slightly more difficult than just calling the dosemu
+	// interrupt (0xE5), we need to check if the interrupt has a
+	// handler, as DOS and BIOS don't establish a default handler
+
+	if( getvect( 0xE5 ) == NULL )
+		return (false);
+	r.x.ax = 0;
+	int86( 0xE5, &r, &r );
+	if( r.x.ax == 0xAA55 )			// check signature
+	{
+		ver_major = r.h.bh;
+		ver_minor = r.h.bl;
+		return (true);
+	}
+
+	return (false);
+}
+
+boolean host_os::desqview_detect()
+{
+	union   REGS r;
+
+	r.x.ax = 0x2B01;                // AL=01 => get desqview version
+	r.x.cx = 0x4445;		// CX = 'DE'
+	r.x.dx = 0x5351;		// DX = 'SQ'
+	int86( 0x21, &r, &r );
+	if( r.h.al != 0xFF )
+	{
+		ver_major = r.h.bh;
+		ver_minor = r.h.bl;
+		return (true);
+	}
+
+	return (false);
+}