1 files changed, 198 insertions, 0 deletions
diff --git a/demos/3rdparty/doom/i_system.c b/demos/3rdparty/doom/i_system.c
new file mode 100644
index 00000000..60f5e1b8
--- /dev/null
+++ b/demos/3rdparty/doom/i_system.c
@@ -0,0 +1,198 @@
+// Emacs style mode select   -*- C++ -*- 
+//-----------------------------------------------------------------------------
+//
+// $Id:$
+//
+// Copyright (C) 1993-1996 by id Software, Inc.
+//
+// This source is available for distribution and/or modification
+// only under the terms of the DOOM Source Code License as
+// published by id Software. All rights reserved.
+//
+// The source is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// FITNESS FOR A PARTICULAR PURPOSE. See the DOOM Source Code License
+// for more details.
+//
+// $Log:$
+//
+// DESCRIPTION:
+//
+//-----------------------------------------------------------------------------
+
+#include "gfx.h"
+
+#include "doomdef.h"
+#include "m_misc.h"
+#include "i_video.h"
+#include "i_sound.h"
+
+#include "d_net.h"
+#include "g_game.h"
+
+#ifdef __GNUG__
+#pragma implementation "i_system.h"
+#endif
+#include "i_system.h"
+
+
+
+
+int	mb_used = 6;
+
+
+void
+I_Tactile
+( int	on,
+  int	off,
+  int	total )
+{
+  // UNUSED.
+  on = off = total = 0;
+}
+
+ticcmd_t	emptycmd;
+ticcmd_t*	I_BaseTiccmd(void)
+{
+    return &emptycmd;
+}
+
+
+int  I_GetHeapSize (void)
+{
+    return mb_used*1024*1024;
+}
+
+byte* I_ZoneBase (int*	size)
+{
+    *size = mb_used*1024*1024;
+    return (byte *) gfxAlloc (*size);
+}
+
+
+
+//
+// I_GetTime
+// returns time in 1/70th second tics
+//
+int  I_GetTime (void)
+{
+	systemticks_t	tdiv;
+
+	tdiv = gfxMillisecondsToTicks(1000*256/TICRATE);
+	return (gfxSystemTicks()<<8)/tdiv;
+}
+
+
+
+//
+// I_Init
+//
+void I_Init (void)
+{
+    I_InitSound();
+    //  I_InitGraphics();
+}
+
+//
+// I_Quit
+//
+void I_Quit (void)
+{
+    D_QuitNetGame ();
+    I_ShutdownSound();
+    I_ShutdownMusic();
+    M_SaveDefaults ();
+    I_ShutdownGraphics();
+    gfxExit();
+}
+
+void I_WaitVBL(int count)
+{
+    gfxSleepMilliseconds(1000/TICRATE);
+}
+
+void I_BeginRead(void)
+{
+}
+
+void I_EndRead(void)
+{
+}
+
+byte*	I_AllocLow(int length)
+{
+    byte*	mem;
+        
+    mem = (byte *)gfxAlloc (length);
+    memset (mem,0,length);
+    return mem;
+}
+
+
+//
+// I_Error
+//
+extern boolean demorecording;
+
+void I_Error (char *error, ...)
+{
+#if 0
+    va_list	argptr;
+
+    // Message first.
+    va_start (argptr,error);
+    fprintf (stderr, "Error: ");
+    vfprintf (stderr,error,argptr);
+    fprintf (stderr, "\n");
+    va_end (argptr);
+
+    fflush( stderr );
+#endif
+
+    // Shutdown. Here might be other errors.
+    if (demorecording)
+	G_CheckDemoStatus();
+
+    D_QuitNetGame ();
+    I_ShutdownGraphics();
+    
+    gfxHalt(error);
+}
+
+#include "doom1_wad.h"
+
+#define F1NAME		"doom1.wad"
+#define	F1SIZE		4196020
+#define F1HANDLE	313			// Some random number > 2
+static size_t		f1pos;
+
+int I_HaveFile(char *fname) {
+	return !strcmp(fname, F1NAME);
+}
+
+int I_FileSize(int handle) {
+	return handle == F1HANDLE ? F1SIZE : 0;
+}
+
+int I_FileRead(int handle, char *buf, int len) {
+	if (handle != F1HANDLE || len <= 0) return 0;
+	if (f1pos + len > F1SIZE)
+		len = F1SIZE - f1pos;
+	memcpy(buf, doom1_wad+f1pos, len);
+	return len;
+}
+void I_FilePos(int handle, int pos) {
+	if (handle != F1HANDLE) return;
+	if (pos > F1SIZE)
+		pos = F1SIZE;
+	f1pos = pos;
+}
+int I_FileOpenRead(char *fname) {
+	return strcmp(fname, F1NAME) ? -1 : F1HANDLE;
+}
+void I_FileClose(int handle) {
+}
+void *I_Realloc(void *p, int nsize) {
+	return gfxRealloc(p, 0 /* Oops - we don't know this */, nsize);
+}