fteqw/engine/client/sys_sdl.c

#include "quakedef.h"

#include <SDL.h>
#ifdef MULTITHREAD
#include <SDL_thread.h>
#endif

#include <SDL_loadso.h>


#ifndef WIN32
#include <fcntl.h>
#include <sys/stat.h>
#if defined(__unix__) || defined(__unix) ||defined(__HAIKU__) || (defined(__APPLE__) && defined(__MACH__))	//apple make everything painful.
#include <unistd.h>
#endif
#else
#include <direct.h>
#endif

#ifdef FTE_TARGET_WEB
#include <emscripten/emscripten.h>
#endif

#if SDL_MAJOR_VERSION >= 2
extern SDL_Window *sdlwindow;
#endif

#ifndef isDedicated
qboolean isDedicated;
#endif

void Sys_Error (const char *error, ...)
{
	va_list argptr;
	char string[1024];

	va_start (argptr,error);
	vsnprintf (string, sizeof (string), error, argptr);
	va_end (argptr);
	COM_WorkerAbort(string);
	fprintf(stderr, "Error: %s\n", string);

	Sys_Printf ("Quake Error: %s\n", string);

#if SDL_MAJOR_VERSION >= 2
	SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR, "Sys_Error", string, sdlwindow);
#endif

	if (COM_CheckParm("-crashonerror"))
		*(int*)-3 = 0;

	Host_Shutdown ();
	exit (1);
}

void Sys_RecentServer(char *command, char *target, char *title, char *desc)
{
}

qboolean Sys_RandomBytes(qbyte *string, int len)
{
	return false;
}

static void ApplyColour(unsigned int chrflags)
{
//on win32, SDL usually redirected stdout to a file (as it won't get printed anyway.
//win32 doesn't do ascii escapes, and text editors like to show the gibberish too, so just don't bother emitting any.
#ifndef _WIN32
	static const int ansiremap[8] = {0, 4, 2, 6, 1, 5, 3, 7};
	static int oldflags = CON_WHITEMASK;
	int bg, fg;

	if (oldflags == chrflags)
		return;
	oldflags = chrflags;

	printf("\e[0;"); // reset

	if (chrflags & CON_BLINKTEXT)
		printf("5;"); // set blink

	bg = (chrflags & CON_BGMASK) >> CON_BGSHIFT;
	fg = (chrflags & CON_FGMASK) >> CON_FGSHIFT;

	// don't handle intensive bit for background
	// as terminals differ too much in displaying \e[1;7;3?m
	bg &= 0x7;

	if (chrflags & CON_NONCLEARBG)
	{
		if (fg & 0x8) // intensive bit set for foreground
		{
			printf("1;"); // set bold/intensity ansi flag
			fg &= 0x7; // strip intensive bit
		}

		// set foreground and background colors
		printf("3%i;4%im", ansiremap[fg], ansiremap[bg]);
	}
	else
	{
		switch(fg)
		{
		//to get around wierd defaults (like a white background) we have these special hacks for colours 0 and 7
		case COLOR_BLACK:
			printf("7m"); // set inverse
			break;
		case COLOR_GREY:
			printf("1;30m"); // treat as dark grey
			break;
		case COLOR_WHITE:
			printf("m"); // set nothing else
			break;
		default:
			if (fg & 0x8) // intensive bit set for foreground
			{
				printf("1;"); // set bold/intensity ansi flag
				fg &= 0x7; // strip intensive bit
			}

			printf("3%im", ansiremap[fg]); // set foreground
			break;
		}
	}
#endif
}
//#include <wchar.h>
void Sys_Printf (char *fmt, ...)
{
	va_list		argptr;
	char		text[2048];
	conchar_t	ctext[2048];
	conchar_t       *c, *e;
	wchar_t		w;
	unsigned int codeflags, codepoint;

//	if (nostdout)
//		return;

	va_start (argptr,fmt);
	vsnprintf (text,sizeof(text)-1, fmt,argptr);
	va_end (argptr);

	if (strlen(text) > sizeof(text))
		Sys_Error("memory overwrite in Sys_Printf");

	e = COM_ParseFunString(CON_WHITEMASK, text, ctext, sizeof(ctext), false);

	for (c = ctext; c < e; )
	{
		c = Font_Decode(c, &codeflags, &codepoint);
		if (codeflags & CON_HIDDEN)
			continue;

		if (codepoint == '\n' && (codeflags&CON_NONCLEARBG))
			codeflags &= CON_WHITEMASK;
		ApplyColour(codeflags);
		w = codepoint;
		if (w >= 0xe000 && w < 0xe100)
		{
			/*not all quake chars are ascii compatible, so map those control chars to safe ones so we don't mess up anyone's xterm*/
			if ((w & 0x7f) > 0x20)
				putc(w&0x7f, stdout);
			else if (w & 0x80)
			{
				static char tab[32] = "---#@.@@@@ # >.." "[]0123456789.---";
				putc(tab[w&31], stdout);
			}
			else
			{
				static char tab[32] = ".####.#### # >.." "[]0123456789.---";
				putc(tab[w&31], stdout);
			}
		}
		else if (w < ' ' && w != '\t' && w != '\r' && w != '\n')
			putc('?', stdout);	//don't let anyone print escape codes or other things that could crash an xterm.
		else
		{
			/*putwc doesn't like me. force it in utf8*/
			if (w >= 0x80)
			{
				if (w > 0x800)
				{
					putc(0xe0 | ((w>>12)&0x0f), stdout);
					putc(0x80 | ((w>>6)&0x3f), stdout);
				}
				else
					putc(0xc0 | ((w>>6)&0x1f), stdout);
				putc(0x80 | (w&0x3f), stdout);
			}
			else
				putc(w, stdout);
		}
	}

	ApplyColour(CON_WHITEMASK);
	fflush(stdout);
}




//#define QCLOCK(e,n,q,f,i) //q must have t=

#if SDL_VERSION_ATLEAST(2,0,18)	//less wrappy... still terrible precision.
	#define CLOCKDEF_SDL_TICKS QCLOCK(TICKS, "ticks", t=SDL_GetTicks64(), 1000,;)
#else
	#define CLOCKDEF_SDL_TICKS QCLOCK(TICKS, "ticks", t=SDL_GetTicks(), 1000,;)
#endif

static quint64_t sdlperf_freq;
#define CLOCKDEF_SDL_PERF  QCLOCK(PERF,  "perf", t=SDL_GetPerformanceCounter(), sdlperf_freq,sdlperf_freq=SDL_GetPerformanceFrequency())

#if defined(CLOCK_MONOTONIC) && (_POSIX_C_SOURCE >= 200112L)
	#define CLOCKDEF_LINUX_MONOTONIC QCLOCK(MONOTONIC, "monotonic", {	\
				struct timespec ts;	\
				clock_gettime(CLOCK_MONOTONIC, &ts);	\
				t = (ts.tv_sec*(quint64_t)1000000000) + ts.tv_nsec;	\
			}, 1000000000,;)
#else
	#define CLOCKDEF_LINUX_MONOTONIC
#endif

#if defined(CLOCK_REALTIME) && (_POSIX_C_SOURCE >= 200112L)
	#define CLOCKDEF_LINUX_REALTIME QCLOCK(REALTIME, "realtime", {	\
				struct timespec ts;	\
				clock_gettime(CLOCK_REALTIME, &ts);	\
				t = (ts.tv_sec*(quint64_t)1000000000) + ts.tv_nsec;	\
			}, 1000000000,;)
#else
	#define CLOCKDEF_LINUX_REALTIME
#endif

#if _POSIX_C_SOURCE >= 200112L
	#include <sys/time.h>
	#define CLOCKDEF_POSIX_GTOD QCLOCK(GTOD, "gettimeofday", {	\
			struct timeval tp;	\
			gettimeofday(&tp, NULL);	\
			t = tp.tv_sec*(quint64_t)1000000 + tp.tv_usec;	\
		}, 1000000,;)
#else
	#define CLOCKDEF_POSIX_GTOD
#endif

#define CLOCKDEF_ALL	\
					 CLOCKDEF_LINUX_MONOTONIC CLOCKDEF_LINUX_REALTIME /*linux-specific clocks*/\
					 CLOCKDEF_SDL_PERF CLOCKDEF_SDL_TICKS /*sdl clocks*/\
					 CLOCKDEF_POSIX_GTOD /*posix clocks*/

static quint64_t timer_basetime;    //used by all clocks to bias them to starting at 0
static quint64_t timer_nobacksies;  //used by all clocks to bias them to starting at 0
static void Sys_ClockType_Changed(cvar_t *var, char *oldval);
#define QCLOCK(e,n,q,f,i) n"\n"
static cvar_t sys_clocktype = CVARFCD("sys_clocktype", "", CVAR_NOTFROMSERVER, Sys_ClockType_Changed, "Controls which system clock to base timings from.\nAvailable Clocks:\n"
	CLOCKDEF_ALL);
#undef QCLOCK

static enum
{
#define QCLOCK(e,n,q,f,i) CLOCKID_##e,
	CLOCKDEF_ALL
#undef QCLOCK
	CLOCKID_INVALID
} timer_clocktype=CLOCKID_INVALID;
static quint64_t Sys_GetClock(quint64_t *freq)
{
	quint64_t t;
	switch(timer_clocktype)
	{
	default:
#define QCLOCK(e,n,q,f,i) case CLOCKID_##e: *freq = f; q; break;
	CLOCKDEF_ALL
#undef QCLOCK
	}
	t -= timer_basetime;
	if (t < timer_nobacksies && t-*freq>timer_nobacksies)
	{
		quint64_t back = timer_nobacksies-t;
		t = timer_nobacksies;
		if (back > 0)//*freq/1000)	//warn if the clock went backwards by more than 1ms.
			Con_Printf("Warning: clock went backwards by %g secs.\n", back/(double)*freq);
		if (back > 0x8000000 && *freq==1000)
		{	//32bit value wrapped?
			timer_basetime -= 0x8000000;
			t += 0x8000000;
		}
	}
	else
		timer_nobacksies = t;
	return t;
}
static void Sys_ClockType_Changed(cvar_t *var, char *oldval)
{
	int newtype;

#define QCLOCK(e,n,q,f,i) if (!strcasecmp(var->string, n)) newtype = CLOCKID_##e; else
	CLOCKDEF_ALL
#undef QCLOCK
	{
		quint64_t freq;
		if (!*var->string || !strcasecmp(var->string, "auto"))
			;
		else
		{
			Con_Printf("%s: Unknown clock name %s available clocks", var->name, var->string);
#define QCLOCK(e,n,q,f,i) Con_Printf(", %s", n);
	CLOCKDEF_ALL
#undef QCLOCK
			Con_Printf("\n");
		}

		//look for any that work.
		for(newtype = 0; ; newtype++)
		{
			switch(newtype)
			{
			default:
				freq = 0;
				Sys_Error("No usable clocks");
#define QCLOCK(e,n,q,f,i) case CLOCKID_##e: freq = f; break;
	CLOCKDEF_ALL
#undef QCLOCK
			}
			if (freq)
				break;	//this clock seems usable.
		}
	}

	if (newtype != timer_clocktype)
	{
		quint64_t oldtime, oldfreq;
		quint64_t newtime, newfreq;

		oldtime = Sys_GetClock(&oldfreq);
		timer_clocktype = newtype;
		timer_nobacksies = timer_basetime = 0;	//make sure we get the raw clock.
		newtime = Sys_GetClock(&newfreq);

		timer_basetime = newtime - (newfreq * ((long double)oldtime) / oldfreq);
		timer_nobacksies = newtime - timer_basetime;

		Sys_GetClock(&newfreq);
	}
}
static void Sys_InitClock(void)
{
	quint64_t freq;

	Cvar_Register(&sys_clocktype, "System vars");

#define QCLOCK(e,n,q,f,i) i;
	CLOCKDEF_ALL
#undef QCLOCK

	//calibrate it, and apply.
	timer_clocktype = CLOCKID_INVALID;
	Sys_ClockType_Changed(&sys_clocktype, NULL);
	timer_basetime = timer_nobacksies = 0;
	timer_basetime = Sys_GetClock(&freq);
	timer_nobacksies = 0;
}
double Sys_DoubleTime (void)
{
	quint64_t denum, num = Sys_GetClock(&denum);
	return num / (long double)denum;
}
unsigned int Sys_Milliseconds (void)
{
	quint64_t denum, num = Sys_GetClock(&denum);
	num *= 1000;
	return num / denum;
}

//create a directory
void Sys_mkdir (const char *path)
{
#if WIN32
	_mkdir (path);
#else
	//user, group, others
	mkdir (path, 0755);	//WARNING: DO NOT RUN AS ROOT!
#endif
}

qboolean Sys_rmdir (const char *path)
{
	int ret;
#if WIN32
	ret = _rmdir (path);
#else
	ret = rmdir (path);
#endif
	if (ret == 0)
		return true;
//	if (errno == ENOENT)
//		return true;
	return false;
}

//unlink a file
qboolean Sys_remove (const char *path)
{
	remove(path);

	return true;
}

qboolean Sys_Rename (const char *oldfname, const char *newfname)
{
	return !rename(oldfname, newfname);
}

#if _POSIX_C_SOURCE >= 200112L
	#include <sys/statvfs.h>
#endif
qboolean Sys_GetFreeDiskSpace(const char *path, quint64_t *freespace)
{
#if _POSIX_C_SOURCE >= 200112L
	//posix 2001
	struct statvfs inf;
	if(0==statvfs(path, &inf))
	{
		*freespace = inf.f_bsize*(quint64_t)inf.f_bavail;
		return true;
	}
#endif
	return false;
}

//someone used the 'quit' command
void Sys_Quit (void)
{
	Host_Shutdown();

	SDL_free((char*)host_parms.binarydir);
	host_parms.binarydir = NULL;

	exit (0);
}

//enumerate the files in a directory (of both gpath and match - match may not contain ..)
//calls the callback for each one until the callback returns 0
//SDL provides no file enumeration facilities.
#if defined(_WIN32)
#include <windows.h>
//outlen is the size of out in _BYTES_.
wchar_t *widen(wchar_t *out, size_t outbytes, const char *utf8)
{
	size_t outlen;
	wchar_t *ret = out;
	//utf-8 to utf-16, not ucs-2.
	unsigned int codepoint;
	int error;
	outlen = outbytes/sizeof(wchar_t);
	if (!outlen)
		return L"";
	outlen--;
	while (*utf8)
	{
		codepoint = utf8_decode(&error, utf8, (void*)&utf8);
		if (error || codepoint > 0x10FFFFu)
			codepoint = 0xFFFDu;
		if (codepoint > 0xffff)
		{
			if (outlen < 2)
				break;
			outlen -= 2;
			codepoint -= 0x10000u;
			*out++ = 0xD800 | (codepoint>>10);
			*out++ = 0xDC00 | (codepoint&0x3ff);
		}
		else
		{
			if (outlen < 1)
				break;
			outlen -= 1;
			*out++ = codepoint;
		}
	}
	*out = 0;
	return ret;
}
char *narrowen(char *out, size_t outlen, wchar_t *wide)
{
	char *ret = out;
	int bytes;
	unsigned int codepoint;
	if (!outlen)
		return "";
	outlen--;
	//utf-8 to utf-16, not ucs-2.
	while (*wide)
	{
		codepoint = *wide++;
		if (codepoint >= 0xD800u && codepoint <= 0xDBFFu)
		{ //handle utf-16 surrogates
			if (*wide >= 0xDC00u && *wide <= 0xDFFFu)
			{
				codepoint = (codepoint&0x3ff)<<10;
				codepoint |= *wide++ & 0x3ff;
			}
			else
				codepoint = 0xFFFDu;
		}
		bytes = utf8_encode(out, codepoint, outlen);
		if (bytes <= 0)
			break;
		out += bytes;
		outlen -= bytes;
	}
	*out = 0;
	return ret;
}
static int Sys_EnumerateFiles2 (const char *match, int matchstart, int neststart, int (QDECL *func)(const char *fname, qofs_t fsize, time_t mtime, void *parm, searchpathfuncs_t *spath), void *parm, searchpathfuncs_t *spath)
{
	qboolean go;

	HANDLE r;
	WIN32_FIND_DATAW fd;
	int nest = neststart;	//neststart refers to just after a /
	qboolean wild = false;

	while(match[nest] && match[nest] != '/')
	{
		if (match[nest] == '?' || match[nest] == '*')
			wild = true;
		nest++;
	}
	if (match[nest] == '/')
	{
		char submatch[MAX_OSPATH];
		char tmproot[MAX_OSPATH];

		if (!wild)
			return Sys_EnumerateFiles2(match, matchstart, nest+1, func, parm, spath);

		if (nest-neststart+1> MAX_OSPATH)
			return 1;
		memcpy(submatch, match+neststart, nest - neststart);
		submatch[nest - neststart] = 0;
		nest++;

		if (neststart+4 > MAX_OSPATH)
			return 1;
		memcpy(tmproot, match, neststart);
		strcpy(tmproot+neststart, "*.*");

		{
			wchar_t wroot[MAX_OSPATH];
			r = FindFirstFileExW(widen(wroot, sizeof(wroot), tmproot), FindExInfoStandard, &fd, FindExSearchNameMatch, NULL, 0);
		}
		strcpy(tmproot+neststart, "");
		if (r==(HANDLE)-1)
			return 1;
		go = true;
		do
		{
			char utf8[MAX_OSPATH];
			char file[MAX_OSPATH];
			narrowen(utf8, sizeof(utf8), fd.cFileName);
			if (*utf8 == '.');	//don't ever find files with a name starting with '.'
			else if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)	//is a directory
			{
				if (wildcmp(submatch, utf8))
				{
					int newnest;
					if (strlen(tmproot) + strlen(utf8) + strlen(match+nest) + 2 < MAX_OSPATH)
					{
						Q_snprintfz(file, sizeof(file), "%s%s/", tmproot, utf8);
						newnest = strlen(file);
						strcpy(file+newnest, match+nest);
						go = Sys_EnumerateFiles2(file, matchstart, newnest, func, parm, spath);
					}
				}
			}
		} while(FindNextFileW(r, &fd) && go);
		FindClose(r);
	}
	else
	{
		const char *submatch = match + neststart;
		char tmproot[MAX_OSPATH];

		if (neststart+4 > MAX_OSPATH)
			return 1;
		memcpy(tmproot, match, neststart);
		strcpy(tmproot+neststart, "*.*");

		{
			wchar_t wroot[MAX_OSPATH];
			r = FindFirstFileExW(widen(wroot, sizeof(wroot), tmproot), FindExInfoStandard, &fd, FindExSearchNameMatch, NULL, 0);
		}
		strcpy(tmproot+neststart, "");
		if (r==(HANDLE)-1)
			return 1;
		go = true;
		do
		{
			char utf8[MAX_OSPATH];
			char file[MAX_OSPATH];

			narrowen(utf8, sizeof(utf8), fd.cFileName);
			if (*utf8 == '.')
				;	//don't ever find files with a name starting with '.' (includes .. and . directories, and unix hidden files)
			else if (fd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)	//is a directory
			{
				if (wildcmp(submatch, utf8))
				{
					if (strlen(tmproot+matchstart) + strlen(utf8) + 2 < MAX_OSPATH)
					{
						Q_snprintfz(file, sizeof(file), "%s%s/", tmproot+matchstart, utf8);
						go = func(file, qofs_Make(fd.nFileSizeLow, fd.nFileSizeHigh), 0, parm, spath);
					}
				}
			}
			else
			{
				if (wildcmp(submatch, utf8))
				{
					if (strlen(tmproot+matchstart) + strlen(utf8) + 1 < MAX_OSPATH)
					{
						Q_snprintfz(file, sizeof(file), "%s%s", tmproot+matchstart, utf8);
						go = func(file, qofs_Make(fd.nFileSizeLow, fd.nFileSizeHigh), 0, parm, spath);
					}
				}
			}
		} while(FindNextFileW(r, &fd) && go);
		FindClose(r);
	}
	return go;
}
int Sys_EnumerateFiles (const char *gpath, const char *match, int (QDECL *func)(const char *fname, qofs_t fsize, time_t modtime, void *parm, searchpathfuncs_t *spath), void *parm, searchpathfuncs_t *spath)
{
	char fullmatch[MAX_OSPATH];
	int start;
	if (strlen(gpath) + strlen(match) + 2 > MAX_OSPATH)
		return 1;

	strcpy(fullmatch, gpath);
	start = strlen(fullmatch);
	if (start && fullmatch[start-1] != '/')
		fullmatch[start++] = '/';
	fullmatch[start] = 0;
	strcat(fullmatch, match);
	return Sys_EnumerateFiles2(fullmatch, start, start, func, parm, spath);
}
#elif defined(linux) || defined(__unix__) || defined(__MACH__) || defined(__HAIKU__)
#include <dirent.h>
#include <errno.h>
static int Sys_EnumerateFiles2 (const char *truepath, int apathofs, const char *match, int (*func)(const char *, qofs_t, time_t modtime, void *, searchpathfuncs_t *), void *parm, searchpathfuncs_t *spath)
{
	DIR *dir;
	char file[MAX_OSPATH];
	const char *s;
	struct dirent *ent;
	struct stat st;
	const char *wild;
	const char *apath = truepath+apathofs;

	//if there's a * in a system path, then we need to scan its parent directory to figure out what the * expands to.
	//we can just recurse quicklyish to try to handle it.
	wild = strchr(apath, '*');
	if (!wild)
		wild = strchr(apath, '?');
	if (wild)
	{
		char subdir[MAX_OSPATH];
		for (s = wild+1; *s && *s != '/'; s++)
			;
		while (wild > truepath)
		{
			if (*(wild-1) == '/')
				break;
			wild--;
		}
		memcpy(file, truepath, wild-truepath);
		file[wild-truepath] = 0;

		dir = opendir(file);
		memcpy(subdir, wild, s-wild);
		subdir[s-wild] = 0;
		if (dir)
		{
			do
			{
				ent = readdir(dir);
				if (!ent)
					break;
				if (*ent->d_name != '.')
				{
#ifdef _DIRENT_HAVE_D_TYPE
					if (ent->d_type != DT_DIR && ent->d_type != DT_UNKNOWN)
						continue;
#endif
					if (wildcmp(subdir, ent->d_name))
					{
						memcpy(file, truepath, wild-truepath);
						Q_snprintfz(file+(wild-truepath), sizeof(file)-(wild-truepath), "%s%s", ent->d_name, s);
						if (!Sys_EnumerateFiles2(file, apathofs, match, func, parm, spath))
						{
							closedir(dir);
							return false;
						}
					}
				}
			} while(1);
			closedir(dir);
		}
		return true;
	}


	dir = opendir(truepath);
	if (!dir)
	{
		Con_DLPrintf((errno==ENOENT)?2:1, "Failed to open dir %s\n", truepath);
		return true;
	}
	do
	{
		ent = readdir(dir);
		if (!ent)
			break;
		if (*ent->d_name != '.')
		{
			if (wildcmp(match, ent->d_name))
			{
				Q_snprintfz(file, sizeof(file), "%s/%s", truepath, ent->d_name);

				if (stat(file, &st) == 0 || lstat(file, &st) == 0)
				{
					Q_snprintfz(file, sizeof(file), "%s%s%s", apath, ent->d_name, S_ISDIR(st.st_mode)?"/":"");

					if (!func(file, st.st_size, st.st_mtime, parm, spath))
					{
//						Con_DPrintf("giving up on search after finding %s\n", file);
						closedir(dir);
						return false;
					}
				}
//				else
//					printf("Stat failed for \"%s\"\n", file);
			}
		}
	} while(1);
	closedir(dir);
	return true;
}
int Sys_EnumerateFiles (const char *gpath, const char *match, int (*func)(const char *, qofs_t, time_t modtime, void *, searchpathfuncs_t *), void *parm, searchpathfuncs_t *spath)
{
	char apath[MAX_OSPATH];
	char truepath[MAX_OSPATH];
	char *s;

	if (!gpath)
		gpath = "";
	*apath = '\0';

	Q_strncpyz(apath, match, sizeof(apath));
	for (s = apath+strlen(apath)-1; s >= apath; s--)
	{
		if (*s == '/')
		{
			s[1] = '\0';
			match += s - apath+1;
			break;
		}
	}
	if (s < apath)	//didn't find a '/'
		*apath = '\0';

	Q_snprintfz(truepath, sizeof(truepath), "%s/%s", gpath, apath);
	return Sys_EnumerateFiles2(truepath, strlen(gpath)+1, match, func, parm, spath);
}

#else
int Sys_EnumerateFiles (const char *gpath, const char *match, int (*func)(const char *, qofs_t, time_t mtime, void *, void *), void *parm, void *spath)
{
	Con_Printf("Warning: Sys_EnumerateFiles not implemented\n");
	return false;
}
#endif

//blink window if possible (it's not)
void Sys_ServerActivity(void)
{
}

void Sys_CloseLibrary(dllhandle_t *lib)
{
	SDL_UnloadObject((void*)lib);
}
dllhandle_t *Sys_LoadLibrary(const char *name, dllfunction_t *funcs)
{
	int i;
	void *lib;

	lib = SDL_LoadObject(name);
	if (!lib)
	{
		char libpath[MAX_OSPATH];
		Q_snprintfz(libpath, sizeof(libpath), "%s"ARCH_DL_POSTFIX, name);
		lib = SDL_LoadObject(libpath);
	}
	if (!lib)
		return NULL;

	if (funcs)
	{
		for (i = 0; funcs[i].name; i++)
		{
			*funcs[i].funcptr = SDL_LoadFunction(lib, funcs[i].name);
			if (!*funcs[i].funcptr)
				break;
		}
		if (funcs[i].name)
		{
			Sys_CloseLibrary((dllhandle_t*)lib);
			lib = NULL;
		}
	}

	return (dllhandle_t*)lib;
}
void *Sys_GetAddressForName(dllhandle_t *module, const char *exportname)
{
	if (!module)
		return NULL;
	return SDL_LoadFunction((void *)module, exportname);
}





//used to see if a file exists or not.
int	Sys_FileTime (char *path)
{
	FILE	*f;
	
	f = fopen(path, "rb");
	if (f)
	{
		fclose(f);
		return 1;
	}
	
	return -1;
}

char *Sys_URIScheme_NeedsRegistering(void)
{   //no support.
    return NULL;
}

void Sys_Init(void)
{
	SDL_Init(SDL_INIT_TIMER | SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE);
	Sys_InitClock();
}
void Sys_Shutdown(void)
{
	SDL_Quit();
}



int VARGS Sys_DebugLog(char *file, char *fmt, ...)
{
	FILE *fd;
	va_list argptr; 
	static char data[1024];
    
	va_start(argptr, fmt);
	vsnprintf(data, sizeof(data)-1, fmt, argptr);
	va_end(argptr);

#if defined(CRAZYDEBUGGING) && CRAZYDEBUGGING > 1
	{
		static int sock;
		if (!sock)
		{
			struct sockaddr_in sa;
			netadr_t na;
			int _true = true;
			int listip;
			listip = COM_CheckParm("-debugip");
			NET_StringToAdr(listip?com_argv[listip+1]:"127.0.0.1", &na);
			NetadrToSockadr(&na, (struct sockaddr_qstorage*)&sa);
			sa.sin_port = htons(10000);
			sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
			if (-1==connect(sock, (struct sockaddr*)&sa, sizeof(sa)))
				Sys_Error("Couldn't send debug log lines\n");
			setsockopt(sock, IPPROTO_TCP, TCP_NODELAY, (char*)&_true, sizeof(_true));
		}
		send(sock, data, strlen(data), 0);
	}
#endif
	fd = fopen(file, "wt");
	if (fd)
	{
		fwrite(data, 1, strlen(data), fd);
		fclose(fd);
		return 0;
	}
	return 1;
};



qboolean Sys_InitTerminal(void)
{
    return false;	//Sys_ConsoleInput cannot work, so return false here.
}
char *Sys_ConsoleInput(void)
{
	return NULL;
}
void Sys_CloseTerminal (void)
{
}

#ifdef _WIN32
#ifndef WIN32_LEAN_AND_MEAN
#define WIN32_LEAN_AND_MEAN
#endif

#include <windows.h>
#endif

#ifdef FTE_TARGET_WEB
void Sys_MainLoop(void)
{
	static float oldtime;
	float newtime, time;
	newtime = Sys_DoubleTime ();
	if (!oldtime)
		oldtime = newtime;
	time = newtime - oldtime;
	Host_Frame (time);
	oldtime = newtime;
}
#endif

int QDECL main(int argc, char **argv)
{
	float time, newtime, oldtime;
	quakeparms_t	parms;
	int i;

	memset(&parms, 0, sizeof(parms));

	parms.basedir = "./";
	parms.binarydir = SDL_GetBasePath();

	parms.argc = argc;
	parms.argv = (const char**)argv;
#ifdef CONFIG_MANIFEST_TEXT
	parms.manifest = CONFIG_MANIFEST_TEXT;
#endif

#if !defined(WIN32)
	fcntl(0, F_SETFL, fcntl (0, F_GETFL, 0) | O_NDELAY);
#endif

	COM_InitArgv (parms.argc, parms.argv);

	TL_InitLanguages(parms.basedir);

	if (parms.binarydir)
		Sys_Printf("Binary is located at \"%s\"\n", parms.binarydir);
	Host_Init (&parms);

	oldtime = Sys_DoubleTime ();

	for (i = 1; i < parms.argc; i++)
	{
		if (!parms.argv[i])
			continue;
		if (*parms.argv[i] == '+' || *parms.argv[i] == '-')
			break;
		Host_RunFile(parms.argv[i], strlen(parms.argv[i]), NULL);
	}

//client console should now be initialized.

    /* main window message loop */
	while (1)
	{
#ifndef CLIENTONLY
		if (isDedicated)
		{
			float delay;
		// find time passed since last cycle
			newtime = Sys_DoubleTime ();
			time = newtime - oldtime;
			oldtime = newtime;
			
			delay = SV_Frame();
			NET_Sleep(delay, false);
		}
		else
#endif
		{
			double sleeptime;

	// yield the CPU for a little while when paused, minimized, or not the focus
#if SDL_MAJOR_VERSION >= 2
			if (!vid.activeapp)
				SDL_Delay(1);
#else
			if (!(SDL_GetAppState() & SDL_APPINPUTFOCUS))
				SDL_Delay(1);
#endif

			newtime = Sys_DoubleTime ();
			time = newtime - oldtime;
			sleeptime = Host_Frame (time);
			oldtime = newtime;

			if (sleeptime)
				Sys_Sleep(sleeptime);
		}
	}

	return 0;
}

#ifdef _MSC_VER
//our version of sdl_main.lib, which doesn't fight c runtimes.
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
{
	int argc;
	int i, l, c;
	LPWSTR *argvw;
	char **argv;
	char utf8arg[1024];
	argvw = CommandLineToArgvW(GetCommandLineW(), &argc);
	argv = malloc(argc * sizeof(char*));
	for (i = 0; i < argc; i++)
	{
		for(l = 0, c = 0; argvw[i][l]; l++)
			c += utf8_encode(utf8arg+c, argvw[i][l], sizeof(utf8arg) - c-1);
		utf8arg[c] = 0;
		argv[i] = strdup(utf8arg);
	}
	return main(argc, argv);
}
#endif

qboolean Sys_GetDesktopParameters(int *width, int *height, int *bpp, int *refreshrate)
{
#if SDL_MAJOR_VERSION >= 2
	SDL_DisplayMode mode;
	if (!SDL_GetDesktopDisplayMode(0, &mode))
	{
		*width = mode.w;
		*height = mode.h;
		*bpp = (SDL_PIXELTYPE(mode.format) == SDL_PIXELTYPE_PACKED32)?32:16;
		*refreshrate = mode.refresh_rate;
		return true;
	}
#endif
	return false;
}



#if SDL_MAJOR_VERSION >= 2	//probably could include 1.3
#include <SDL_clipboard.h>
void Sys_Clipboard_PasteText(clipboardtype_t cbt, void (*callback)(void *cb, const char *utf8), void *ctx)
{
	char *txt;
#if SDL_VERSION_ATLEAST(2,26,0)
	if (cbt == CBT_SELECTION)
		txt = SDL_GetPrimarySelectionText();
	else
#endif
		txt = SDL_GetClipboardText();
	callback(ctx, txt);
	SDL_free(txt);
}
void Sys_SaveClipboard(clipboardtype_t cbt, const char *text)
{
#if SDL_VERSION_ATLEAST(2,26,0)
	if (cbt == CBT_SELECTION)
		SDL_SetPrimarySelectionText(text);
	else
#endif
		SDL_SetClipboardText(text);
}
#else
static char *clipboard_buffer;
void Sys_Clipboard_PasteText(clipboardtype_t cbt, void (*callback)(void *cb, const char *utf8), void *ctx)
{
	callback(ctx, clipboard_buffer);
}
void Sys_SaveClipboard(clipboardtype_t cbt, const char *text)
{
	free(clipboard_buffer);
	clipboard_buffer = strdup(text);
}
#endif

#ifdef MULTITHREAD

/*Thread management stuff*/
static SDL_threadID mainthread;
static SDL_TLSID tls_threadinfo;
struct threadinfo_s
{
	jmp_buf jmpbuf;	//so we can actually abort our threads...
	int (*threadfunc)(void *args);
	void *args;
};

void Sys_ThreadsInit(void)
{
	mainthread = SDL_ThreadID();
}
qboolean Sys_IsThread(void *thread)
{
	return SDL_GetThreadID(thread) == SDL_ThreadID();
}
qboolean Sys_IsMainThread(void)
{
	return mainthread == SDL_ThreadID();
}
void Sys_ThreadAbort(void)
{
	//SDL_KillThread(NULL) got removed... so we have to do things the shitty way.

	struct threadinfo_s *tinfo = SDL_TLSGet(tls_threadinfo);
	if (!tinfo)
	{	//erk... not created via Sys_CreateThread?!?
		SDL_Delay(10*1000);
		exit(0);
	}
	longjmp(tinfo->jmpbuf, 1);
}
static int FTESDLThread(void *args)
{	//all for Sys_ThreadAbort
	struct threadinfo_s *tinfo = args;
	int r;
	SDL_TLSSet(tls_threadinfo, tinfo, NULL);
	if (setjmp(tinfo->jmpbuf))
		r = 0;	//aborted...
	else
		r = tinfo->threadfunc(tinfo->args);
	SDL_TLSSet(tls_threadinfo, NULL, NULL);
	Z_Free(tinfo);
	return r;
}
void *Sys_CreateThread(char *name, int (*func)(void *), void *args, int priority, int stacksize)
{
	// SDL threads do not support setting thread stack size
	struct threadinfo_s *tinfo = Z_Malloc(sizeof(*tinfo));
	tinfo->threadfunc = func;
	tinfo->args = args;
#if SDL_MAJOR_VERSION >= 2
	return (void *)SDL_CreateThread(FTESDLThread, name, tinfo);
#else
	return (void *)SDL_CreateThread(FTESDLThread, tinfo);
#endif
}

void Sys_WaitOnThread(void *thread)
{
	SDL_WaitThread((SDL_Thread *)thread, NULL);
}


/* Mutex calls */
#if SDL_MAJOR_VERSION >= 2
void *Sys_CreateMutex(void)
{
	return (void *)SDL_CreateMutex();
}

qboolean Sys_TryLockMutex(void *mutex)
{
	return !SDL_TryLockMutex(mutex);
}

qboolean Sys_LockMutex(void *mutex)
{
	return !SDL_LockMutex(mutex);
}

qboolean Sys_UnlockMutex(void *mutex)
{
	return !SDL_UnlockMutex(mutex);
}

void Sys_DestroyMutex(void *mutex)
{
	SDL_DestroyMutex(mutex);
}
#else
// SDL mutexes don't have try-locks for mutexes in the spec so we stick with 1-value semaphores
void *Sys_CreateMutex(void)
{
	return (void *)SDL_CreateSemaphore(1);
}

qboolean Sys_TryLockMutex(void *mutex)
{
	return !SDL_SemTryWait(mutex);
}

qboolean Sys_LockMutex(void *mutex)
{
	return !SDL_SemWait(mutex);
}

qboolean Sys_UnlockMutex(void *mutex)
{
	return !SDL_SemPost(mutex);
}

void Sys_DestroyMutex(void *mutex)
{
	SDL_DestroySemaphore(mutex);
}
#endif

/* Conditional wait calls */
typedef struct condvar_s
{
	SDL_mutex *mutex;
	SDL_cond *cond;
} condvar_t;

void *Sys_CreateConditional(void)
{
	condvar_t *condv;
	SDL_mutex *mutex;
	SDL_cond *cond;
	
	condv = (condvar_t *)malloc(sizeof(condvar_t));
	if (!condv)
		return NULL;
		
	mutex = SDL_CreateMutex();
	cond = SDL_CreateCond();
	
	if (mutex)
	{
		if (cond)
		{
			condv->cond = cond;
			condv->mutex = mutex;
		
			return (void *)condv;
		}
		else
			SDL_DestroyMutex(mutex);
	}
	
	free(condv);
	return NULL;	
}

qboolean Sys_LockConditional(void *condv)
{
	return !SDL_mutexP(((condvar_t *)condv)->mutex);
}

qboolean Sys_UnlockConditional(void *condv)
{
	return !SDL_mutexV(((condvar_t *)condv)->mutex);
}

qboolean Sys_ConditionWait(void *condv)
{
	return !SDL_CondWait(((condvar_t *)condv)->cond, ((condvar_t *)condv)->mutex);
}

qboolean Sys_ConditionSignal(void *condv)
{
	return !SDL_CondSignal(((condvar_t *)condv)->cond);
}

qboolean Sys_ConditionBroadcast(void *condv)
{
	return !SDL_CondBroadcast(((condvar_t *)condv)->cond);
}

void Sys_DestroyConditional(void *condv)
{
	condvar_t *cv = (condvar_t *)condv;
	
	SDL_DestroyCond(cv->cond);
	SDL_DestroyMutex(cv->mutex);
	free(cv);
}
#endif

void Sys_Sleep (double seconds)
{
	SDL_Delay(seconds * 1000);
}

#ifdef WEBCLIENT
qboolean Sys_RunInstaller(void)
{       //not implemented
    return false;
}
#endif

#ifdef HAVEAUTOUPDATE
//returns true if we could sucessfull overwrite the engine binary.
qboolean Sys_SetUpdatedBinary(const char *fname)
{
	return false;
}
//says whether the system code is able/allowed to overwrite itself.
//(ie: return false if we don't know the binary name or if its write-protected etc)
qboolean Sys_EngineMayUpdate(void)
{
	return false;	//sorry
}
#endif