/* Copyright (C) 1989 - 1995, 1997 artofcode LLC.  All rights reserved.
  
  This file is part of GNU Ghostscript.
  
  GNU Ghostscript is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY.  No author or distributor accepts responsibility
  to anyone for the consequences of using it or for whether it serves any
  particular purpose or works at all, unless he says so in writing.  Refer
  to the GNU General Public License for full details.
  
  Everyone is granted permission to copy, modify and redistribute GNU
  Ghostscript, but only under the conditions described in the GNU General
  Public License.  A copy of this license is supposed to have been given
  to you along with GNU Ghostscript so you can know your rights and
  responsibilities.  It should be in a file named COPYING.  Among other
  things, the copyright notice and this notice must be preserved on all
  copies.
*/


#include <Palettes.h>
#include <Aliases.h>
#include <Quickdraw.h>
#include <QDOffscreen.h>
#include <AppleEvents.h>
#include <Fonts.h>
#include <Controls.h>
#include <Script.h>
#include <Timer.h>
#include <Folders.h>
#include <Resources.h>
#include <Sound.h>
#include <ToolUtils.h>
#include <Menus.h>
#include <LowMem.h>
#include <Devices.h>
#include <Scrap.h>
#include <StringCompare.h>
#include <Fonts.h>
#include <FixMath.h>
#include <Resources.h>
#include "math_.h"
#include <string.h>
#include <stdlib.h>


#include <Time.h>
#include <sys/time.h>
#include <sys/types.h>
#include "memory_.h"
#include "string_.h"
#include "gx.h"
#include "gp.h"
#include "gsdll.h"
#include "gpcheck.h"
#include "gp_mac.h"
#include "gdebug.h"
#include "sys/stat.h"
#include <stdarg.h>
/*#include "gpgetenv.h"*/
#include "gsexit.h"

HWND hwndtext;	/* used as identifier for the dll instance */


void
noMemoryExit(void)
{
	Alert(307, NULL);
	ExitToShell();
}

char *
mygetenv(const char * env) {

	char 			*p;
	FSSpec			pFile;
	OSErr			err = 0;
	char			fpath[256]="";
	
	return 0;
	
}



void
gp_init (void)

{
	extern char    *gs_lib_default_path;
	extern char    *gs_init_file;
	

#if 0
	/*...Initialize Ghostscript's default library paths and initialization file...*/

	{
		int			i;
		char	  **p;


		for (i = iGSLibPathStr, p = &gs_lib_default_path;
			 i <= iGSInitFileStr;
			 i++, p = &gs_init_file)
		{
			GetIndString (string, MACSTRS_RES_ID, i);
			(void) PtoCstr (string);
			*p = gs_malloc (1, (size_t) (strlen ((char *) string) + 1), "gp_init");
			strcpy (*p, (char *) string);
		}
	}
#endif
}

void
gp_exit(int exit_status, int code)
{
}

/* Exit the program. */
void
gp_do_exit(int exit_status)
{
/*    exit(exit_status);*/
}

/* gettimeofday */
#ifndef HZ
#  define	HZ	100	/* see sys/param.h */
#endif
int
gettimeofday(struct timeval *tvp)
{
    struct tm tms;
    static unsigned long offset = 0;
    long ticks;

    if (!offset) {
	time(&offset);
	offset -= (time((unsigned long *)&tms) / HZ);
    }
    ticks = time((unsigned long *)&tms);
    tvp->tv_sec = ticks / HZ + offset;
    tvp->tv_usec = (ticks % HZ) * (1000 * 1000 / HZ);
    return 0;
}

/* ------ Date and time ------ */

#define gettimeofday_no_timezone 0

/* Read the current time (in seconds since Jan. 1, 1970) */
/* and fraction (in nanoseconds). */
void
gp_get_realtime(long *pdt)
{
    struct timeval tp;

	if (gettimeofday(&tp) == -1) {
	    lprintf("Ghostscript: gettimeofday failed!\n");
	    gs_exit(1);
	}

    /* tp.tv_sec is #secs since Jan 1, 1970 */
    pdt[0] = tp.tv_sec;

    /* Some Unix systems (e.g., Interactive 3.2 r3.0) return garbage */
    /* in tp.tv_usec.  Try to filter out the worst of it here. */
    pdt[1] = tp.tv_usec >= 0 && tp.tv_usec < 1000000 ? tp.tv_usec * 1000 : 0;
	
#ifdef DEBUG_CLOCK
    printf("tp.tv_sec = %d  tp.tv_usec = %d  pdt[0] = %ld  pdt[1] = %ld\n",
	   tp.tv_sec, tp.tv_usec, pdt[0], pdt[1]);
#endif
}

/* Read the current user CPU time (in seconds) */
/* and fraction (in nanoseconds).  */
void
gp_get_usertime(long *pdt)
{
    gp_get_realtime(pdt);	/* Use an approximation on other hosts.  */
	pdt[0] -= (char)rand(); // was needed, if used for random generator seed (g3 is too fast)
}


/*
 * Get the string corresponding to an OS error number.
 * If no string is available, return NULL.  The caller may assume
 * the string is allocated statically and permanently.
 */
const char *	gp_strerror(P1(int))
{
	return NULL;
}


/* ------ Date and time ------ */

/* Read the current date (in days since Jan. 1, 1980) */
/* and time (in milliseconds since midnight). */

void
gp_get_clock (long *pdt) {

   gp_get_realtime(pdt);	/* Use an approximation on other hosts.  */
  
}

void
gpp_get_clock (long *pdt)

{
	long				secs;
	DateTimeRec			dateRec;
	static DateTimeRec	baseDateRec = {1980, 1, 1, 0, 0, 0, 1};
	long				pdtmp[2];
	void 				do_get_clock (DateTimeRec *dateRec, long *pdt);


	GetDateTime ((unsigned long *) &secs);
//	SecsondsToDate (secs, &dateRec);

	do_get_clock (&dateRec	  , pdt);
	do_get_clock (&baseDateRec, pdtmp);

	/* If the date is reasonable, subtract the days since Jan. 1, 1980 */

	if (pdtmp[0] < pdt[0])
		pdt[0] -= pdtmp[0];

#ifdef DEBUG_CLOCK
	printf("pdt[0] = %ld  pdt[1] = %ld\n", pdt[0], pdt[1]);
#endif
}

UnsignedWide beginMicroTickCount={0,0};

/* Read the current date (in days since Jan. 1, 1980) */
/* and time (in nanoseconds since midnight). */

	void
gpp_get_realtime (long *pdt)

{

    UnsignedWide microTickCount,
    	nMicroTickCount;

	long idate;
	static const int mstart[12] =
	   { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
	long				secs;
	DateTimeRec			dateRec;
	static DateTimeRec	baseDateRec = {1980, 1, 1, 0, 0, 0, 1};
	void 				do_get_clock (DateTimeRec *dateRec, long *pdt);


    if ((beginMicroTickCount.lo == 0)&&(beginMicroTickCount.hi == 0) )  {
    	Microseconds(&beginMicroTickCount);
    }
    	

   	Microseconds(&microTickCount);
    
    nMicroTickCount.lo = microTickCount.lo - beginMicroTickCount.lo;
    nMicroTickCount.hi = microTickCount.hi - beginMicroTickCount.hi;
    
	GetDateTime ((unsigned long *) &secs);
	//SecondsToDate (secs, &dateRec);


	/* If the date is reasonable, subtract the days since Jan. 1, 1980 */

	idate = ((long) dateRec.year - 1980) * 365 +	/* days per year */
	  	(((long) dateRec.year - 1)/4 - 1979/4) +	/* intervening leap days */
		(1979/100 - ((long) dateRec.year - 1)/100) +
		(((long) dateRec.month - 1)/400 - 1979/400) +
		mstart[dateRec.month - 1] +		/* month is 1-origin */
		dateRec.day - 1;			/* day of month is 1-origin */
	idate += (2 < dateRec.month
		  && (dateRec.year % 4 == 0
		      && (dateRec.year % 100 != 0 || dateRec.year % 400 == 0)));
	pdt[0] = ((idate*24 + dateRec.hour) * 60 + dateRec.minute) * 60 + dateRec.second;
	pdt[1] = nMicroTickCount.lo * 100;

//#define DEBUG_CLOCK 1
#ifdef DEBUG_CLOCK
	fprintf(stderr,"pdt[0] = %ld  pdt[1] = %ld\n", pdt[0], pdt[1]);
	fprintf(stderr,"b hi[0] = %ld  lo[1] = %ld\n",  beginMicroTickCount.hi, beginMicroTickCount.lo);
	fprintf(stderr,"m hi[0] = %ld  lo[1] = %ld\n", microTickCount.hi, microTickCount.lo);
#endif
}


static void
do_get_clock (DateTimeRec *dateRec, long *pdt)

{
long idate;
static const int mstart[12] =
   { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 };
	/* This gets UTC, not local time */
	/* We have no way of knowing the time zone correction */
	idate = ((long) dateRec->year - 1980) * 365 +	/* days per year */
	  	(((long) dateRec->year - 1)/4 - 1979/4) +	/* intervening leap days */
		(1979/100 - ((long) dateRec->year - 1)/100) +
		(((long) dateRec->month - 1)/400 - 1979/400) +
		mstart[dateRec->month - 1] +		/* month is 1-origin */
		dateRec->day - 1;			/* day of month is 1-origin */
	idate += (2 < dateRec->month
		  && (dateRec->year % 4 == 0
		      && (dateRec->year % 100 != 0 || dateRec->year % 400 == 0)));
	pdt[0] = ((idate*24 + dateRec->hour) * 60 + dateRec->minute) * 60 + dateRec->second;
	pdt[1] = 0; //dateRec->milisecond * 1000000;

}

void
gpp_get_usertime(long *pdt)
{
	gp_get_realtime(pdt);	/* Use an approximation for now.  */
}


/* ------ Screen management ------ */

/* Initialize the console. */
/* do nothing, we did it in gp_init()! */
void
gp_init_console(P0())
{
}


/* Write a string to the console. */

void
gp_console_puts (const char *str, uint size)
{
/*	fwrite (str, 1, size, stdout);*/
	return;
}

/* Make the console current on the screen. */
/*
int
gp_make_console_current (gx_device *dev)
{
	return 0;
}
*/

/* Make the graphics current on the screen. */
/*
int
gp_make_graphics_current (gx_device *dev)
{
	return 0;
}
*/

const char *
gp_getenv_display(P0())
{
	return NULL;
}


int
gp_check_interrupts(void)
{
	static unsigned long	lastYieldTicks = 0;
	
	if ((TickCount() - lastYieldTicks) > 2) {
		lastYieldTicks = TickCount();
		/* the hwnd parameter which is submitted in gsdll_init to the DLL */
		/* is returned in every gsdll_poll message in the count parameter */
		return (*pgsdll_callback) (GSDLL_POLL, 0, (long) hwndtext);
		return 0;
	} else {
		return 0;
	}
}

