mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-05 20:50:43 +00:00
416 lines
8.7 KiB
C
416 lines
8.7 KiB
C
/*
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sys.c
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virtual filesystem functions
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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static const char rcsid[] =
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"$Id$";
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_LIMITS_H
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# include <limits.h>
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#endif
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#ifdef HAVE_IO_H
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# include <io.h>
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#endif
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#ifdef HAVE_WINDOWS_H
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# include <windows.h>
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#endif
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#ifdef HAVE_SYS_MMAN_H
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# include <sys/mman.h>
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#endif
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <time.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include "QF/cvar.h"
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#include "QF/dstring.h"
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#include "QF/sys.h"
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#include "compat.h"
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static void Sys_StdPrintf (const char *fmt, va_list args);
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static void Sys_ErrPrintf (const char *fmt, va_list args);
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cvar_t *sys_nostdout;
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cvar_t *sys_extrasleep;
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cvar_t *sys_dead_sleep;
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cvar_t *sys_sleep;
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int sys_checksum;
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static sys_printf_t sys_std_printf_function = Sys_StdPrintf;
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static sys_printf_t sys_err_printf_function = Sys_ErrPrintf;
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typedef struct shutdown_list_s {
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struct shutdown_list_s *next;
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void (*func)(void);
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} shutdown_list_t;
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static shutdown_list_t *shutdown_list;
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/* The translation table between the graphical font and plain ASCII --KB */
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const char sys_char_map[256] = {
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'\0', '#', '#', '#', '#', '.', '#', '#',
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'#', 9, 10, '#', ' ', 13, '.', '.',
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'[', ']', '0', '1', '2', '3', '4', '5',
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'6', '7', '8', '9', '.', '<', '=', '>',
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' ', '!', '"', '#', '$', '%', '&', '\'',
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'(', ')', '*', '+', ',', '-', '.', '/',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', ':', ';', '<', '=', '>', '?',
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'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
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'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
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'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
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'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
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'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
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'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
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'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
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'x', 'y', 'z', '{', '|', '}', '~', '<',
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'<', '=', '>', '#', '#', '.', '#', '#',
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'#', '#', ' ', '#', ' ', '>', '.', '.',
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'[', ']', '0', '1', '2', '3', '4', '5',
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'6', '7', '8', '9', '.', '<', '=', '>',
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' ', '!', '"', '#', '$', '%', '&', '\'',
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'(', ')', '*', '+', ',', '-', '.', '/',
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'0', '1', '2', '3', '4', '5', '6', '7',
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'8', '9', ':', ';', '<', '=', '>', '?',
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'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
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'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
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'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
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'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
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'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
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'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
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'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
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'x', 'y', 'z', '{', '|', '}', '~', '<'
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};
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#define MAXPRINTMSG 4096
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void
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Sys_mkdir (const char *path)
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{
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#ifdef HAVE_MKDIR
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# ifdef _WIN32
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if (mkdir (path) == 0)
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return;
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# else
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if (mkdir (path, 0777) == 0)
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return;
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# endif
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#else
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# ifdef HAVE__MKDIR
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if (_mkdir (path) == 0)
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return;
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# else
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# error do not know how to make directories
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# endif
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#endif
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if (errno != EEXIST)
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Sys_Error ("mkdir %s: %s", path, strerror (errno));
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}
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int
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Sys_FileTime (const char *path)
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{
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#ifdef HAVE_ACCESS
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if (access (path, R_OK) == 0)
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return 0;
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#else
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# ifdef HAVE__ACCESS
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if (_access (path, R_OK) == 0)
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return 0;
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# else
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# error do not know how to check access
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# endif
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#endif
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return -1;
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}
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/*
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Sys_SetPrintf
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for want of a better name, but it sets the function pointer for the
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actual implementation of Sys_Printf.
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*/
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void
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Sys_SetStdPrintf (sys_printf_t func)
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{
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sys_std_printf_function = func;
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}
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void
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Sys_SetErrPrintf (sys_printf_t func)
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{
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sys_err_printf_function = func;
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}
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void
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Sys_Print (FILE *stream, const char *fmt, va_list args)
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{
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static dstring_t *msg;
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unsigned char *p;
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if (!msg)
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msg = dstring_new ();
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dvsprintf (msg, fmt, args);
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if (stream == stderr) {
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#ifdef WIN32
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MessageBox (NULL, msg->str, "Fatal Error", 0 /* MB_OK */ );
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#endif
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fputs ("Fatal Error: ", stream);
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}
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/* translate to ASCII instead of printing [xx] --KB */
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for (p = (unsigned char *) msg->str; *p; p++)
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putc (sys_char_map[*p], stream);
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if (stream == stderr) {
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fputs ("\n", stream);
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}
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fflush (stream);
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}
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static void
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Sys_StdPrintf (const char *fmt, va_list args)
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{
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if (sys_nostdout && sys_nostdout->int_val)
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return;
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Sys_Print (stdout, fmt, args);
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}
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static void
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Sys_ErrPrintf (const char *fmt, va_list args)
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{
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Sys_Print (stderr, fmt, args);
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}
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void
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Sys_Printf (const char *fmt, ...)
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{
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va_list args;
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va_start (args, fmt);
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sys_std_printf_function (fmt, args);
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va_end (args);
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}
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void
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Sys_DPrintf (const char *fmt, ...)
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{
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va_list args;
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if (!developer || !developer->int_val)
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return;
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va_start (args, fmt);
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sys_std_printf_function (fmt, args);
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va_end (args);
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}
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double
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Sys_DoubleTime (void)
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{
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static qboolean first = true;
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#ifdef _WIN32
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static DWORD starttime;
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DWORD now;
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now = timeGetTime ();
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if (first) {
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first = false;
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starttime = now;
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return 0.0;
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}
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if (now < starttime) // wrapped?
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return (now / 1000.0) + (LONG_MAX - starttime / 1000.0);
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if (now - starttime == 0)
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return 0.0;
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return (now - starttime) / 1000.0;
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#else
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struct timeval tp;
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struct timezone tzp;
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double now;
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static double start_time;
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gettimeofday (&tp, &tzp);
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now = tp.tv_sec + tp.tv_usec / 1e6;
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if (first) {
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first = false;
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start_time = now;
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}
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return now - start_time;
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#endif
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}
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void
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Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
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{
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#ifdef _WIN32
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DWORD flOldProtect;
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if (!VirtualProtect
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((LPVOID) startaddr, length, PAGE_READWRITE, &flOldProtect))
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Sys_Error ("Protection change failed");
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#else
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# ifdef HAVE_MPROTECT
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int r;
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unsigned long addr;
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int psize = getpagesize ();
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addr = (startaddr & ~(psize - 1)) - psize;
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// fprintf(stderr, "writable code %lx(%lx)-%lx, length=%lx\n", startaddr,
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// addr, startaddr+length, length);
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r = mprotect ((char *) addr, length + startaddr - addr + psize, 7);
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if (r < 0)
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Sys_Error ("Protection change failed");
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# endif
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#endif
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}
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void
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Sys_Init_Cvars (void)
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{
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sys_nostdout = Cvar_Get ("sys_nostdout", "0", CVAR_NONE, NULL,
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"Set to disable std out");
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sys_extrasleep = Cvar_Get ("sys_extrasleep", "0", CVAR_NONE, NULL,
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"Set to cause whatever amount delay in "
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"microseconds you want. Mostly "
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"useful to generate simulated bad "
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"connections.");
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sys_dead_sleep = Cvar_Get ("sys_dead_sleep", "1", CVAR_NONE, NULL,
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"When set, the server gets NO cpu if no "
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"clients are connected and there's no other "
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"activity. *MIGHT* cause problems with some "
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"mods.");
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sys_sleep = Cvar_Get ("sys_sleep", "8", CVAR_NONE, NULL, "Sleep how long "
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"in seconds between checking for connections. "
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"Minimum is 0, maximum is 13");
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}
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void
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Sys_Shutdown (void)
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{
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shutdown_list_t *p = shutdown_list;
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while (p) {
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p->func ();
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p = p->next;
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}
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}
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void
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Sys_Quit (void)
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{
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Sys_Shutdown ();
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exit (0);
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}
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void
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Sys_Error (const char *error, ...)
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{
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va_list argptr;
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va_start (argptr, error);
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sys_err_printf_function (error, argptr);
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va_end (argptr);
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Sys_Shutdown ();
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exit (1);
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}
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void
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Sys_RegisterShutdown (void (*func) (void))
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{
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shutdown_list_t *p;
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if (!func)
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return;
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p = malloc (sizeof (*p));
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if (!p)
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Sys_Error ("Sys_RegisterShutdown: insufficient memory");
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p->func = func;
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p->next = shutdown_list;
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shutdown_list = p;
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}
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int
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Sys_TimeID (void) //FIXME I need a new name, one that doesn't make me feel 3 feet thick
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{
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int val;
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#ifdef _WIN32
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val = ((int) (timeGetTime () * 1000) * time (NULL)) & 0xffff;
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#else
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val = ((int) (getpid () + getuid () * 1000) * time (NULL)) & 0xffff;
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#endif
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return val;
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}
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void
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Sys_PageIn (void *ptr, int size)
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{
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//may or may not be useful in linux #ifdef WIN32
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byte *x;
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int m, n;
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// touch all the memory to make sure it's there. The 16-page skip is to
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// keep Win 95 from thinking we're trying to page ourselves in (we are
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// doing that, of course, but there's no reason we shouldn't)
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x = (byte *) ptr;
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for (n = 0; n < 4; n++) {
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for (m = 0; m < (size - 16 * 0x1000); m += 4) {
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sys_checksum += *(int *) &x[m];
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sys_checksum += *(int *) &x[m + 16 * 0x1000];
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}
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}
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//#endif
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}
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