ref: c74cb1b65f46fc2b3846238418bc6c8272d454a3
dir: /src/i_system.c/
//
// Copyright(C) 1993-1996 Id Software, Inc.
// Copyright(C) 2005-2014 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.
//
// 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 "SDL.h"
#include "config.h"
#include "deh_str.h"
#include "doomtype.h"
#include "m_argv.h"
#include "m_config.h"
#include "m_misc.h"
#include "i_joystick.h"
#include "i_sound.h"
#include "i_timer.h"
#include "i_video.h"
#include "i_system.h"
#include "w_wad.h"
#include "z_zone.h"
#define DEFAULT_RAM 16 /* MiB */
#define MIN_RAM 4 /* MiB */
typedef struct atexit_listentry_s atexit_listentry_t;
struct atexit_listentry_s
{
atexit_func_t func;
boolean run_on_error;
atexit_listentry_t *next;
};
static atexit_listentry_t *exit_funcs = NULL;
void I_AtExit(atexit_func_t func, boolean run_on_error)
{
atexit_listentry_t *entry;
entry = malloc(sizeof(*entry));
entry->func = func;
entry->run_on_error = run_on_error;
entry->next = exit_funcs;
exit_funcs = entry;
}
// Tactile feedback function, probably used for the Logitech Cyberman
void I_Tactile(int on, int off, int total)
{
}
// 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;
}
byte *I_ZoneBase (int *size)
{
byte *zonemem;
int min_ram, default_ram;
int p;
//!
// @category obscure
// @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;
}
void I_PrintBanner(const char *msg)
{
int i;
int spaces = 35 - (strlen(msg) / 2);
for (i=0; i<spaces; ++i)
putchar(' ');
puts(msg);
}
void I_PrintDivider(void)
{
int i;
for (i=0; i<75; ++i)
{
putchar('=');
}
putchar('\n');
}
void I_PrintStartupBanner(const char *gamedescription)
{
I_PrintDivider();
I_PrintBanner(gamedescription);
I_PrintDivider();
printf(
" " PACKAGE_NAME " is free software, covered by the GNU General Public\n"
" License. There is NO warranty; not even for MERCHANTABILITY or FITNESS\n"
" FOR A PARTICULAR PURPOSE. You are welcome to change and distribute\n"
" copies under certain conditions. See the source for more information.\n");
I_PrintDivider();
}
//
// 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 false;
#else
return isatty(fileno(stdout));
#endif
}
//
// I_Init
//
/*
void I_Init (void)
{
I_CheckIsScreensaver();
I_InitTimer();
I_InitJoystick();
}
void I_BindVariables(void)
{
I_BindVideoVariables();
I_BindJoystickVariables();
I_BindSoundVariables();
}
*/
//
// I_Quit
//
void I_Quit (void)
{
atexit_listentry_t *entry;
// Run through all exit functions
entry = exit_funcs;
while (entry != NULL)
{
entry->func();
entry = entry->next;
}
SDL_Quit();
exit(0);
}
//
// I_Error
//
static boolean already_quitting = false;
void I_Error (const char *error, ...)
{
char msgbuf[512];
va_list argptr;
atexit_listentry_t *entry;
boolean exit_gui_popup;
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);
// Write a copy of the message into buffer.
va_start(argptr, error);
memset(msgbuf, 0, sizeof(msgbuf));
M_vsnprintf(msgbuf, sizeof(msgbuf), error, argptr);
va_end(argptr);
// Shutdown. Here might be other errors.
entry = exit_funcs;
while (entry != NULL)
{
if (entry->run_on_error)
{
entry->func();
}
entry = entry->next;
}
//!
// @category obscure
//
// If specified, don't show a GUI window for error messages when the
// game exits with an error.
//
exit_gui_popup = !M_ParmExists("-nogui");
// Pop up a GUI dialog box to show the error message, if the
// game was not run from the console (and the user will
// therefore be unable to otherwise see the message).
if (exit_gui_popup && !I_ConsoleStdout())
{
SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
PACKAGE_STRING, msgbuf, NULL);
}
// abort();
SDL_Quit();
exit(-1);
}
//
// I_Realloc
//
void *I_Realloc(void *ptr, size_t size)
{
void *new_ptr;
new_ptr = realloc(ptr, size);
if (size != 0 && new_ptr == NULL)
{
I_Error ("I_Realloc: failed on reallocation of %zu bytes", size);
}
return new_ptr;
}
//
// 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;
}