ref: 6e099632c653dd42dbe1f719c5887844091da0cc
dir: /src/i_system.c/
// Emacs style mode select -*- C++ -*-
//-----------------------------------------------------------------------------
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
//
// DESCRIPTION:
//
//-----------------------------------------------------------------------------
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#else
#include <unistd.h>
#endif
#include "deh_main.h"
#include "doomdef.h"
#include "doomstat.h"
#include "m_argv.h"
#include "m_config.h"
#include "m_misc.h"
#include "i_joystick.h"
#include "i_timer.h"
#include "i_video.h"
#include "s_sound.h"
#include "d_net.h"
#include "g_game.h"
#include "i_system.h"
#include "txt_main.h"
#include "w_wad.h"
#include "z_zone.h"
#define DEFAULT_RAM 16 /* MiB */
#define MIN_RAM 4 /* MiB */
int show_endoom = 1;
// Tactile feedback function, probably used for the Logitech Cyberman
void I_Tactile(int on, int off, int total)
{
}
#ifdef _WIN32_WCE
// Windows CE-specific auto-allocation function that allocates the zone
// size based on the amount of memory reported free by the OS.
static byte *AutoAllocMemory(int *size, int default_ram, int min_ram)
{
MEMORYSTATUS memory_status;
byte *zonemem;
size_t available;
// Get available physical RAM. We leave one megabyte extra free
// for the OS to keep running (my PDA becomes unstable if too
// much RAM is allocated)
GlobalMemoryStatus(&memory_status);
available = memory_status.dwAvailPhys - 2 * 1024 * 1024;
// Limit to default_ram if we have more than that available:
if (available > default_ram * 1024 * 1024)
{
available = default_ram * 1024 * 1024;
}
if (available < min_ram * 1024 * 1024)
{
I_Error("Unable to allocate %i MiB of RAM for zone", min_ram);
}
// Allocate zone:
*size = available;
zonemem = malloc(*size);
if (zonemem == NULL)
{
I_Error("Failed when allocating %i bytes", *size);
}
return zonemem;
}
#else
// Zone memory auto-allocation function that allocates the zone size
// by trying progressively smaller zone sizes until one is found that
// works.
static byte *AutoAllocMemory(int *size, int default_ram, int min_ram)
{
byte *zonemem;
// Allocate the zone memory. This loop tries progressively smaller
// zone sizes until a size is found that can be allocated.
// If we used the -mb command line parameter, only the parameter
// provided is accepted.
zonemem = NULL;
while (zonemem == NULL)
{
// We need a reasonable minimum amount of RAM to start.
if (default_ram < min_ram)
{
I_Error("Unable to allocate %i MiB of RAM for zone", default_ram);
}
// Try to allocate the zone memory.
*size = default_ram * 1024 * 1024;
zonemem = malloc(*size);
// Failed to allocate? Reduce zone size until we reach a size
// that is acceptable.
if (zonemem == NULL)
{
default_ram -= 1;
}
}
return zonemem;
}
#endif
byte *I_ZoneBase (int *size)
{
byte *zonemem;
int min_ram, default_ram;
int p;
//!
// @arg <mb>
//
// Specify the heap size, in MiB (default 16).
//
p = M_CheckParmWithArgs("-mb", 1);
if (p > 0)
{
default_ram = atoi(myargv[p+1]);
min_ram = default_ram;
}
else
{
default_ram = DEFAULT_RAM;
min_ram = MIN_RAM;
}
zonemem = AutoAllocMemory(size, default_ram, min_ram);
printf("zone memory: %p, %x allocated for zone\n",
zonemem, *size);
return zonemem;
}
//
// I_ConsoleStdout
//
// Returns true if stdout is a real console, false if it is a file
//
boolean I_ConsoleStdout(void)
{
#ifdef _WIN32
// SDL "helpfully" always redirects stdout to a file.
return 0;
#else
return isatty(fileno(stdout));
#endif
}
//
// I_Init
//
void I_Init (void)
{
I_CheckIsScreensaver();
I_InitTimer();
I_InitJoystick();
}
#define ENDOOM_W 80
#define ENDOOM_H 25
//
// Displays the text mode ending screen after the game quits
//
void I_Endoom(void)
{
unsigned char *endoom_data;
unsigned char *screendata;
int y;
int indent;
endoom_data = W_CacheLumpName(DEH_String("ENDOOM"), PU_STATIC);
// Set up text mode screen
TXT_Init();
// Make sure the new window has the right title and icon
I_SetWindowCaption();
I_SetWindowIcon();
// Write the data to the screen memory
screendata = TXT_GetScreenData();
indent = (ENDOOM_W - TXT_SCREEN_W) / 2;
for (y=0; y<TXT_SCREEN_H; ++y)
{
memcpy(screendata + (y * TXT_SCREEN_W * 2),
endoom_data + (y * ENDOOM_W + indent) * 2,
TXT_SCREEN_W * 2);
}
// Wait for a keypress
while (true)
{
TXT_UpdateScreen();
if (TXT_GetChar() >= 0)
{
break;
}
TXT_Sleep(0);
}
// Shut down text mode screen
TXT_Shutdown();
}
//
// I_Quit
//
void I_Quit (void)
{
D_QuitNetGame ();
G_CheckDemoStatus();
S_Shutdown();
if (!screensaver_mode)
{
M_SaveDefaults ();
}
I_ShutdownGraphics();
if (show_endoom && !testcontrols && !screensaver_mode)
{
I_Endoom();
}
exit(0);
}
void I_WaitVBL(int count)
{
I_Sleep((count * 1000) / 70);
}
//
// I_Error
//
extern boolean demorecording;
static boolean already_quitting = false;
void I_Error (char *error, ...)
{
va_list argptr;
if (already_quitting)
{
fprintf(stderr, "Warning: recursive call to I_Error detected.\n");
exit(-1);
}
else
{
already_quitting = true;
}
// Message first.
va_start(argptr, error);
//fprintf(stderr, "\nError: ");
vfprintf(stderr, error, argptr);
fprintf(stderr, "\n\n");
va_end(argptr);
fflush(stderr);
// Shutdown. Here might be other errors.
if (demorecording)
{
G_CheckDemoStatus();
}
D_QuitNetGame ();
I_ShutdownGraphics();
S_Shutdown();
#ifdef _WIN32
// On Windows, pop up a dialog box with the error message.
{
char msgbuf[512];
wchar_t wmsgbuf[512];
va_start(argptr, error);
memset(msgbuf, 0, sizeof(msgbuf));
vsnprintf(msgbuf, sizeof(msgbuf) - 1, error, argptr);
va_end(argptr);
MultiByteToWideChar(CP_ACP, 0,
msgbuf, strlen(msgbuf) + 1,
wmsgbuf, sizeof(wmsgbuf));
MessageBoxW(NULL, wmsgbuf, L"", MB_OK);
}
#endif
// abort();
exit(-1);
}
//
// Read Access Violation emulation.
//
// From PrBoom+, by entryway.
//
// C:\>debug
// -d 0:0
//
// DOS 6.22:
// 0000:0000 (57 92 19 00) F4 06 70 00-(16 00)
// DOS 7.1:
// 0000:0000 (9E 0F C9 00) 65 04 70 00-(16 00)
// Win98:
// 0000:0000 (9E 0F C9 00) 65 04 70 00-(16 00)
// DOSBox under XP:
// 0000:0000 (00 00 00 F1) ?? ?? ?? 00-(07 00)
#define DOS_MEM_DUMP_SIZE 10
static const unsigned char mem_dump_dos622[DOS_MEM_DUMP_SIZE] = {
0x57, 0x92, 0x19, 0x00, 0xF4, 0x06, 0x70, 0x00, 0x16, 0x00};
static const unsigned char mem_dump_win98[DOS_MEM_DUMP_SIZE] = {
0x9E, 0x0F, 0xC9, 0x00, 0x65, 0x04, 0x70, 0x00, 0x16, 0x00};
static const unsigned char mem_dump_dosbox[DOS_MEM_DUMP_SIZE] = {
0x00, 0x00, 0x00, 0xF1, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00};
static unsigned char mem_dump_custom[DOS_MEM_DUMP_SIZE];
static const unsigned char *dos_mem_dump = mem_dump_dos622;
boolean I_GetMemoryValue(unsigned int offset, void *value, int size)
{
static boolean firsttime = true;
if (firsttime)
{
int p, i, val;
firsttime = false;
i = 0;
//!
// @category compat
// @arg <version>
//
// Specify DOS version to emulate for NULL pointer dereference
// emulation. Supported versions are: dos622, dos71, dosbox.
// The default is to emulate DOS 7.1 (Windows 98).
//
p = M_CheckParmWithArgs("-setmem", 1);
if (p > 0)
{
if (!strcasecmp(myargv[p + 1], "dos622"))
{
dos_mem_dump = mem_dump_dos622;
}
if (!strcasecmp(myargv[p + 1], "dos71"))
{
dos_mem_dump = mem_dump_win98;
}
else if (!strcasecmp(myargv[p + 1], "dosbox"))
{
dos_mem_dump = mem_dump_dosbox;
}
else
{
for (i = 0; i < DOS_MEM_DUMP_SIZE; ++i)
{
++p;
if (p >= myargc || myargv[p][0] == '-')
{
break;
}
M_StrToInt(myargv[p], &val);
mem_dump_custom[i++] = (unsigned char) val;
}
dos_mem_dump = mem_dump_custom;
}
}
}
switch (size)
{
case 1:
*((unsigned char *) value) = dos_mem_dump[offset];
return true;
case 2:
*((unsigned short *) value) = dos_mem_dump[offset]
| (dos_mem_dump[offset + 1] << 8);
return true;
case 4:
*((unsigned int *) value) = dos_mem_dump[offset]
| (dos_mem_dump[offset + 1] << 8)
| (dos_mem_dump[offset + 2] << 16)
| (dos_mem_dump[offset + 3] << 24);
return true;
}
return false;
}