mirror of
https://github.com/RTimothyEdwards/magic.git
synced 2026-08-31 10:16:01 +02:00
Patrick Kurth
ea03883829
Added a ARG_UNUSED macro in utils/magic.h, which produces a simple cast to void to silence the warnings. The reasons this is used as opposed to an attribute is that most compilers should support this. Besides this, the macro can be easily searched for in the future to potentially remove (where possible) the unused parameters.
297 lines
6.4 KiB
C
297 lines
6.4 KiB
C
/*
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* grNull.c -
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*
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* *********************************************************************
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* * Copyright (C) 1985, 1990 Regents of the University of California. *
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* * Permission to use, copy, modify, and distribute this *
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* * software and its documentation for any purpose and without *
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* * fee is hereby granted, provided that the above copyright *
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* * notice appear in all copies. The University of California *
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* * makes no representations about the suitability of this *
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* * software for any purpose. It is provided "as is" without *
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* * express or implied warranty. Export of this software outside *
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* * of the United States of America may require an export license. *
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* *********************************************************************
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*
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* This file contains dummy functions for use when there is no
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* graphics display.
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*/
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#include <stdio.h>
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#include <string.h>
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#include "utils/magsgtty.h"
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#include "utils/magic.h"
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#include "utils/geometry.h"
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#include "windows/windows.h"
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#include "graphics/graphics.h"
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#include "graphics/graphicsInt.h"
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#include "textio/textio.h"
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#include "textio/txcommands.h"
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#include "utils/signals.h"
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#ifndef lint
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static char rcsid[] __attribute__ ((unused)) = "$Header: /usr/cvsroot/magic-8.0/graphics/grNull.c,v 1.1.1.1 2008/02/03 20:43:50 tim Exp $";
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#endif /* not lint */
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/* Forward declarations */
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extern bool nullReturnFalse();
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extern void nullDoNothing();
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extern int nullReturnZero();
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/*
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*---------------------------------------------------------
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*
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* nullDoNothing --
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*
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* This procedure does nothing.
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*
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* Results:
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* None.
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*
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* Side Effects:
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* None.
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*
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*---------------------------------------------------------
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*/
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void
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nullDoNothing()
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{
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}
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/*
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*---------------------------------------------------------
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*
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* nullReturnFalse --
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*
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* This procedure does nothing, and returns FALSE.
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*
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* Results:
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* Returns FALSE always.
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*
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* Side Effects:
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* None.
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*
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*---------------------------------------------------------
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*/
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bool
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nullReturnFalse()
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{
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return (FALSE);
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}
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/*
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*---------------------------------------------------------
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*
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* nullReturnZero --
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*
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* This procedure does nothing, and returns 0.
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*
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* Results:
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* Returns 0 always.
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*
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* Side Effects:
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* None.
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*
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*---------------------------------------------------------
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*/
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int
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nullReturnZero()
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{
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return (0);
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}
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/*
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*---------------------------------------------------------
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*
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* NullInit --
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*
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* NullInit doesn't do much of anything.
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*
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* Results:
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* TRUE always.
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*
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* Side Effects:
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* None.
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*
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*---------------------------------------------------------
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*/
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bool
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NullInit()
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{
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return TRUE;
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}
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/*
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* ----------------------------------------------------------------------------
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*
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* NullTextSize --
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*
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* Determine the size of a text string.
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*
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* Results:
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* Returns 0 indicating 'r' has been updated.
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*
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* Side effects:
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* A rectangle is filled in that is the size of the text in pixels.
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* The origin (0, 0) of this rectangle is located on the baseline
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* at the far left side of the string.
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*
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* ----------------------------------------------------------------------------
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*/
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int
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NullTextSize(text, size, r)
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char *text;
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int size;
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Rect *r;
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{
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ARG_UNUSED(size);
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ASSERT(r != NULL, "nullTextSize");
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r->r_xbot = 0;
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r->r_xtop = strlen(text);
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r->r_ybot = 0;
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r->r_ytop = 1;
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return 0;
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}
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/*
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* ----------------------------------------------------------------------------
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*
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* nullStdin --
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*
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* Handle the stdin device for the NULL driver.
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*
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* Results:
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* None.
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*
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* Side Effects:
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* Adds events to the event queue.
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*
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* ----------------------------------------------------------------------------
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*/
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/** @typedef cb_textio_input_t */
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void
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nullStdin(
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int fd,
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ClientData cdata) /* notused */
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{
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ARG_UNUSED(fd);
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ARG_UNUSED(cdata);
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int ch;
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TxInputEvent *event;
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ch = getc(stdin);
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event = TxNewEvent();
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if (ch == EOF)
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event->txe_button = TX_EOF;
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else
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event->txe_button = TX_NO_BUTTON;
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event->txe_buttonAction = 0;
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event->txe_ch = ch;
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event->txe_wid = WIND_UNKNOWN_WINDOW;
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event->txe_p.p_x = GR_CURSOR_X;
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event->txe_p.p_y = GR_CURSOR_Y;
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TxAddEvent(event);
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}
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/*
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* ----------------------------------------------------------------------------
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*
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* NullBitBlt --
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*
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* A no-op BitBlt operation for devices that don't have one (such as
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* the NULL device).
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*
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* Results:
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* None.
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*
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* Side Effects:
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* None, for sure, for sure.
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*
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* ----------------------------------------------------------------------------
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*/
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void
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NullBitBlt()
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{
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}
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/*
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*---------------------------------------------------------
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*
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* nullSetDisplay --
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*
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* This routine sets the appropriate parameters so that
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* Magic will work with the particular display type.
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*
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* Results:
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* Returns TRUE.
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*
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* Side Effects:
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* Depends on the display type.
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*
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*---------------------------------------------------------
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*/
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bool
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nullSetDisplay(dispType, outFileName, mouseFileName)
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char *dispType;
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char *outFileName;
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char *mouseFileName;
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{
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ARG_UNUSED(dispType);
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ARG_UNUSED(outFileName);
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ARG_UNUSED(mouseFileName);
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TxPrintf("Using NULL graphics device.\n");
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TxAdd1InputDevice(fileno(stdin), nullStdin, (ClientData) NULL);
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if (TxStdinIsatty) SigWatchFile(fileno(stdin), "stdin");
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/* Set up the procedure values in the indirection table. */
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GrLockPtr = grSimpleLock;
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GrUnlockPtr = grSimpleUnlock;
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GrInitPtr = NullInit;
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GrClosePtr = nullDoNothing;
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GrSetCMapPtr = nullDoNothing;
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GrEnableTabletPtr = nullDoNothing;
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GrDisableTabletPtr = nullDoNothing;
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GrSetCursorPtr = nullDoNothing;
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GrTextSizePtr = NullTextSize;
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GrDrawGlyphPtr = nullDoNothing;
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GrBitBltPtr = NullBitBlt;
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GrReadPixelPtr = nullReturnZero;
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GrFlushPtr = nullDoNothing;
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/* local indirections */
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grSetSPatternPtr = nullDoNothing;
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grPutTextPtr = nullDoNothing;
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grFontTextPtr = nullDoNothing;
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grDefineCursorPtr = nullDoNothing;
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grDrawGridPtr = nullReturnFalse;
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grDrawLinePtr = nullDoNothing;
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grSetWMandCPtr = nullDoNothing;
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grFillRectPtr = nullDoNothing;
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grSetStipplePtr = nullDoNothing;
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grSetLineStylePtr = nullDoNothing;
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grSetCharSizePtr = nullDoNothing;
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GrScreenRect.r_xtop = 511;
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GrScreenRect.r_ytop = 483;
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/* Set GrDisplayStatus to force graphics updates to be suspended */
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GrDisplayStatus = DISPLAY_SUSPEND;
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return TRUE;
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}
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