/* Copyright (C) 1991, 1995, 1998, 1999, 2000 Aladdin Enterprises.  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.
*/

/*$RCSfile: gp_iwatc.c,v $ $Revision: 1.4.2.1 $ */
/* Intel processor, Watcom C-specific routines for Ghostscript */
#include "dos_.h"
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include "stat_.h"
#include "string_.h"
#include "gx.h"
#include "gp.h"
#include "gpmisc.h"

/* Library routines not declared in a standard header */
extern char *mktemp(P1(char *));	/* in gp_mktmp.c */

/* Define a substitute for stdprn (see below). */
private FILE *gs_stdprn;

/* Forward declarations */
private void handle_FPE(P1(int));

/* Do platform-dependent initialization. */
void
gp_init(void)
{
    gs_stdprn = 0;
    /* Set up the handler for numeric exceptions. */
    signal(SIGFPE, handle_FPE);
}

/* Trap numeric exceptions.  Someday we will do something */
/* more appropriate with these. */
private void
handle_FPE(int sig)
{
    eprintf("Numeric exception:\n");
    exit(1);
}

/* Do platform-dependent cleanup. */
void
gp_exit(int exit_status, int code)
{
}

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

/* ------ Printer accessing ------ */

/* Open a connection to a printer.  A null file name means use the */
/* standard printer connected to the machine, if any. */
/* Return NULL if the connection could not be opened. */
extern void gp_set_file_binary(P2(int, int));
FILE *
gp_open_printer(char fname[gp_file_name_sizeof], int binary_mode)
{
    FILE *pfile;

    if (strlen(fname) == 0 || !strcmp(fname, "PRN")) {
#ifdef stdprn
	if (!binary_mode)
	    return stdprn;
	if (gs_stdprn == 0) {
	    /* We have to effectively reopen the printer, */
	    /* because the Watcom library does \n -> \r\n */
	    /* substitution on the stdprn stream. */
	    int fno = dup(fileno(stdprn));

	    setmode(fno, O_BINARY);
	    gs_stdprn = fdopen(fno, "wb");
	}
	pfile = gs_stdprn;
#else	/* WATCOM doesn't know about stdprn device */
	pfile = fopen("PRN", (binary_mode ? "wb" : "w"));
	if (pfile == NULL)
	    return NULL;
#endif	/* defined(stdprn) */
    } else {
	pfile = fopen(fname, (binary_mode ? "wb" : "w"));
	if (pfile == NULL)
	    return NULL;
    }
    gp_set_file_binary(fileno(pfile), binary_mode);
    return pfile;
}

/* Close the connection to the printer. */
void
gp_close_printer(FILE * pfile, const char *fname)
{
#ifdef stdprn
    if (pfile != stdprn)
#endif	/* defined(stdprn) */
	fclose(pfile);
    if (pfile == gs_stdprn)
	gs_stdprn = 0;
}

/* ------ File naming and accessing ------ */

/* Create and open a scratch file with a given name prefix. */
/* Write the actual file name at fname. */
FILE *
gp_open_scratch_file(const char *prefix, char *fname, const char *mode)
{	      /* The -7 is for XXXXXXX */
    int len = gp_file_name_sizeof - strlen(prefix) - 7;

    if (gp_gettmpdir(fname, &len) != 0)
	*fname = 0;
    else {
	char *temp;

	/* Prevent X's in path from being converted by mktemp. */
	for (temp = fname; *temp; temp++)
	    *temp = tolower(*temp);
	if (strlen(fname) && (fname[strlen(fname) - 1] != '\\'))
	    strcat(fname, "\\");
    }
    strcat(fname, prefix);
    strcat(fname, "XXXXXX");
    mktemp(fname);
    return gp_fopentemp(fname, mode);
}


/* Open a file with the given name, as a stream of uninterpreted bytes. */
FILE *
gp_fopen(const char *fname, const char *mode)
{
    return fopen(fname, mode);
}
