quakeforge/libs/util/sys.c

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/*
sys.c
virtual filesystem functions
Copyright (C) 1996-1997 Id Software, Inc.
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:
Free Software Foundation, Inc.
59 Temple Place - Suite 330
Boston, MA 02111-1307, USA
*/
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static const char rcsid[] =
"$Id$";
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
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# include <unistd.h>
#endif
#ifdef HAVE_LIMITS_H
# include <limits.h>
#endif
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#ifdef HAVE_CONIO_H
# include <conio.h>
#endif
#ifdef HAVE_IO_H
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# include <io.h>
#endif
#ifdef HAVE_WINDOWS_H
# include <windows.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
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#include <time.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include "QF/cvar.h"
#include "QF/dstring.h"
#include "QF/sys.h"
#include "compat.h"
static void Sys_StdPrintf (const char *fmt, va_list args);
static void Sys_ErrPrintf (const char *fmt, va_list args);
cvar_t *sys_nostdout;
cvar_t *sys_extrasleep;
cvar_t *sys_dead_sleep;
cvar_t *sys_sleep;
int sys_checksum;
static sys_printf_t sys_std_printf_function = Sys_StdPrintf;
static sys_printf_t sys_err_printf_function = Sys_ErrPrintf;
typedef struct shutdown_list_s {
struct shutdown_list_s *next;
void (*func)(void);
} shutdown_list_t;
static shutdown_list_t *shutdown_list;
static int do_stdin = 1;
qboolean stdin_ready;
/* The translation table between the graphical font and plain ASCII --KB */
const char sys_char_map[256] = {
'\0', '#', '#', '#', '#', '.', '#', '#',
'#', 9, 10, '#', ' ', 13, '.', '.',
'[', ']', '0', '1', '2', '3', '4', '5',
'6', '7', '8', '9', '.', '<', '=', '>',
' ', '!', '"', '#', '$', '%', '&', '\'',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', '<',
'<', '=', '>', '#', '#', '.', '#', '#',
'#', '#', ' ', '#', ' ', '>', '.', '.',
'[', ']', '0', '1', '2', '3', '4', '5',
'6', '7', '8', '9', '.', '<', '=', '>',
' ', '!', '"', '#', '$', '%', '&', '\'',
'(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', ':', ';', '<', '=', '>', '?',
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G',
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
'X', 'Y', 'Z', '[', '\\', ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w',
'x', 'y', 'z', '{', '|', '}', '~', '<'
};
#define MAXPRINTMSG 4096
#ifndef USE_INTEL_ASM
void
Sys_MaskExceptions (void)
{
}
#endif
void
Sys_mkdir (const char *path)
{
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#ifdef HAVE_MKDIR
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# ifdef _WIN32
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if (mkdir (path) == 0)
return;
# else
if (mkdir (path, 0777) == 0)
return;
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# endif
#else
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# ifdef HAVE__MKDIR
if (_mkdir (path) == 0)
return;
# else
# error do not know how to make directories
# endif
#endif
if (errno != EEXIST)
Sys_Error ("mkdir %s: %s", path, strerror (errno));
}
int
Sys_FileTime (const char *path)
{
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#ifdef HAVE_ACCESS
if (access (path, R_OK) == 0)
return 0;
#else
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# ifdef HAVE__ACCESS
if (_access (path, R_OK) == 0)
return 0;
# else
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# error do not know how to check access
# endif
#endif
return -1;
}
/*
Sys_SetPrintf
for want of a better name, but it sets the function pointer for the
actual implementation of Sys_Printf.
*/
void
Sys_SetStdPrintf (sys_printf_t func)
{
sys_std_printf_function = func;
}
void
Sys_SetErrPrintf (sys_printf_t func)
{
sys_err_printf_function = func;
}
void
Sys_Print (FILE *stream, const char *fmt, va_list args)
{
static dstring_t *msg;
unsigned char *p;
if (!msg)
msg = dstring_new ();
dvsprintf (msg, fmt, args);
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if (stream == stderr) {
#ifdef WIN32
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MessageBox (NULL, msg->str, "Fatal Error", 0 /* MB_OK */ );
#endif
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fputs ("Fatal Error: ", stream);
}
/* translate to ASCII instead of printing [xx] --KB */
for (p = (unsigned char *) msg->str; *p; p++)
putc (sys_char_map[*p], stream);
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if (stream == stderr) {
fputs ("\n", stream);
}
fflush (stream);
}
static void
Sys_StdPrintf (const char *fmt, va_list args)
{
if (sys_nostdout && sys_nostdout->int_val)
return;
Sys_Print (stdout, fmt, args);
}
static void
Sys_ErrPrintf (const char *fmt, va_list args)
{
Sys_Print (stderr, fmt, args);
}
void
Sys_Printf (const char *fmt, ...)
{
va_list args;
va_start (args, fmt);
sys_std_printf_function (fmt, args);
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va_end (args);
}
void
Sys_DPrintf (const char *fmt, ...)
{
va_list args;
if (!developer || !developer->int_val)
return;
va_start (args, fmt);
sys_std_printf_function (fmt, args);
va_end (args);
}
double
Sys_DoubleTime (void)
{
static qboolean first = true;
#ifdef _WIN32
static DWORD starttime;
DWORD now;
now = timeGetTime ();
if (first) {
first = false;
starttime = now;
return 0.0;
}
if (now < starttime) // wrapped?
return (now / 1000.0) + (LONG_MAX - starttime / 1000.0);
if (now - starttime == 0)
return 0.0;
return (now - starttime) / 1000.0;
#else
struct timeval tp;
struct timezone tzp;
double now;
static double start_time;
gettimeofday (&tp, &tzp);
tp.tv_usec /= 1000; // lose some precision, we don't need it
now = tp.tv_sec + tp.tv_usec / 1000.0;
if (first) {
first = false;
start_time = now;
}
return now - start_time;
#endif
}
void
Sys_MakeCodeWriteable (unsigned long startaddr, unsigned long length)
{
#ifdef _WIN32
DWORD flOldProtect;
if (!VirtualProtect
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((LPVOID) startaddr, length, PAGE_READWRITE, &flOldProtect))
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Sys_Error ("Protection change failed");
#else
# ifdef HAVE_MPROTECT
int r;
unsigned long addr;
int psize = getpagesize ();
addr = (startaddr & ~(psize - 1)) - psize;
// fprintf(stderr, "writable code %lx(%lx)-%lx, length=%lx\n", startaddr,
// addr, startaddr+length, length);
r = mprotect ((char *) addr, length + startaddr - addr + psize, 7);
if (r < 0)
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Sys_Error ("Protection change failed");
# endif
#endif
}
void
Sys_Init_Cvars (void)
{
sys_nostdout = Cvar_Get ("sys_nostdout", "0", CVAR_NONE, NULL,
"Set to disable std out");
sys_extrasleep = Cvar_Get ("sys_extrasleep", "0", CVAR_NONE, NULL,
"Set to cause whatever amount delay in "
"microseconds you want. Mostly "
"useful to generate simulated bad "
"connections.");
sys_dead_sleep = Cvar_Get ("sys_dead_sleep", "1", CVAR_NONE, NULL,
"When set, the server gets NO cpu if no "
"clients are connected and there's no other "
"activity. *MIGHT* cause problems with some "
"mods.");
sys_sleep = Cvar_Get ("sys_sleep", "8", CVAR_NONE, NULL, "Sleep how long "
"in seconds between checking for connections. "
"Minimum is 0, maximum is 13");
}
void
Sys_Shutdown (void)
{
shutdown_list_t *p = shutdown_list;
while (p) {
p->func ();
p = p->next;
}
}
void
Sys_Quit (void)
{
Sys_Shutdown ();
exit (0);
}
void
Sys_Error (const char *error, ...)
{
va_list argptr;
va_start (argptr, error);
sys_err_printf_function (error, argptr);
va_end (argptr);
Sys_Shutdown ();
exit (1);
}
void
Sys_RegisterShutdown (void (*func) (void))
{
shutdown_list_t *p;
if (!func)
return;
p = malloc (sizeof (*p));
if (!p)
Sys_Error ("Sys_RegisterShutdown: insufficient memory");
p->func = func;
p->next = shutdown_list;
shutdown_list = p;
}
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int
Sys_TimeID (void) //FIXME I need a new name, one that doesn't make me feel 3 feet thick
{
int val;
#ifdef _WIN32
val = ((int) (timeGetTime () * 1000) * time (NULL)) & 0xffff;
#else
val = ((int) (getpid () + getuid () * 1000) * time (NULL)) & 0xffff;
#endif
return val;
}
void
Sys_PageIn (void *ptr, int size)
{
//may or may not be useful in linux #ifdef WIN32
byte *x;
int m, n;
// touch all the memory to make sure it's there. The 16-page skip is to
// keep Win 95 from thinking we're trying to page ourselves in (we are
// doing that, of course, but there's no reason we shouldn't)
x = (byte *) ptr;
for (n = 0; n < 4; n++) {
for (m = 0; m < (size - 16 * 0x1000); m += 4) {
sys_checksum += *(int *) &x[m];
sys_checksum += *(int *) &x[m + 16 * 0x1000];
}
}
//#endif
}
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void
Sys_DebugLog (const char *file, const char *fmt, ...)
{
va_list argptr;
static char data[1024]; // why static ?
int fd;
va_start (argptr, fmt);
vsnprintf (data, sizeof (data), fmt, argptr);
va_end (argptr);
fd = open (file, O_WRONLY | O_CREAT | O_APPEND, 0666);
write (fd, data, strlen (data));
close (fd);
}
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int
Sys_CheckInput (int idle, int net_socket)
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{
fd_set fdset;
struct timeval _timeout;
struct timeval *timeout = 0;
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#ifdef _WIN32
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int sleep_msec;
// Now we want to give some processing time to other applications,
// such as qw_client, running on this machine.
sleep_msec = sys_sleep->int_val;
if (sleep_msec > 0) {
if (sleep_msec > 13)
sleep_msec = 13;
Sleep (sleep_msec);
}
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_timeout.tv_sec = 0;
_timeout.tv_usec = 100;
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timeout = &_timeout;
if (_kbhit ()) {
stdin_ready = 1;
return 1;
}
#else
_timeout.tv_sec = 0;
_timeout.tv_usec = 10000;
#endif
// select on the net socket and stdin
// the only reason we have a timeout at all is so that if the last
// connected client times out, the message would not otherwise
// be printed until the next event.
FD_ZERO (&fdset);
if (do_stdin)
FD_SET (0, &fdset);
FD_SET (net_socket, &fdset);
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if (!idle || !sys_dead_sleep->int_val)
timeout = &_timeout;
if (select (net_socket + 1, &fdset, NULL, NULL, timeout) == -1
&& errno != EINTR)
return 0;
stdin_ready = FD_ISSET (0, &fdset);
return 1;
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}
/*
Sys_ConsoleInput
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Checks for a complete line of text typed in at the console, then forwards
it to the host command processor
*/
const char *
Sys_ConsoleInput (void)
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{
static char text[256];
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int len = 0;
#ifdef _WIN32
int c;
// read a line out
while (kbhit ()) {
c = _getch ();
putch (c);
if (c == '\r') {
text[len] = 0;
putch ('\n');
len = 0;
return text;
}
if (c == 8) {
if (len) {
putch (' ');
putch (c);
len--;
text[len] = 0;
}
continue;
}
text[len] = c;
len++;
text[len] = 0;
if (len == sizeof (text))
len = 0;
}
return NULL;
#else
if (!stdin_ready || !do_stdin)
return NULL; // the select didn't say it was ready
stdin_ready = false;
len = read (0, text, sizeof (text));
if (len == 0) {
// end of file
do_stdin = 0;
return NULL;
}
if (len < 1)
return NULL;
text[len - 1] = 0; // rip off the \n and terminate
return text;
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#endif
}