/* Copyright (C) 1989 - 1995, 1997 artofcode LLC.  All rights reserved.
  
  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 the Free Software Foundation, Inc.,
  59 Temple Place, Suite 330, Boston, MA, 02111-1307.

*/

/* $Id: gp_mac.c,v 1.1.4.3.2.2 2003/04/12 16:37:26 giles Exp $ */

#ifndef __CARBON__
#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 <Time.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>
#else
#include <Carbon.h>
#endif

#include <stdlib.h>
#include "math_.h"
#include "time_.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 "gpgetenv.h"*/
#include "gsexit.h"

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


char *
mygetenv(const char * env)
{
	return (NULL);
}

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;
}

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


#ifdef CHECK_INTERRUPTS
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 */
		if (pgsdll_callback)
			return (*pgsdll_callback) (GSDLL_POLL, 0, (long) hwndtext);
		return 0;
	} else {
		return 0;
	}
}
#endif