97d6fade74
I'll push a formatting guide at some point. There may still be outstanding changes, but please feel free to resolve those as you arrive a them. To the best of my knowledge, there is no changes to the actual code content, but the formatter does have the occasional bug. If you run into an issue, please fix it!
121 lines
2.8 KiB
C
121 lines
2.8 KiB
C
/* NetHack 3.6 mhinput.c $NHDT-Date: 1431192786 2015/05/09 17:33:06 $ $NHDT-Branch: master $:$NHDT-Revision: 1.10 $ */
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/* NetHack 3.6 mhinput.c $Date: 2009/05/06 10:52:10 $ $Revision: 1.5 $ */
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/* SCCS Id: @(#)mhinput.c 3.5 2005/01/23 */
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/* Copyright (C) 2001 by Alex Kompel */
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/* NetHack may be freely redistributed. See license for details. */
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#include <assert.h>
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#include "winMS.h"
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#include "mhinput.h"
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/* nethack input queue functions */
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#define NH_INPUT_BUFFER_SIZE 64
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/* as it stands right now we need only one slot
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since events are processed almost the same time as
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they occur but I like large round numbers */
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static MSNHEvent nhi_input_buffer[NH_INPUT_BUFFER_SIZE];
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static int nhi_init_input = 0;
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static int nhi_read_pos = 0;
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static int nhi_write_pos = 0;
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/* initialize input queue */
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void
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mswin_nh_input_init()
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{
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if (!nhi_init_input) {
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nhi_init_input = 1;
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ZeroMemory(nhi_input_buffer, sizeof(nhi_input_buffer));
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nhi_read_pos = 0;
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nhi_write_pos = 0;
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}
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}
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/* check for input */
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int
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mswin_have_input()
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{
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return
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#ifdef SAFERHANGUP
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/* we always have input (ESC) if hangup was requested */
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program_state.done_hup ||
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#endif
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(nhi_read_pos != nhi_write_pos);
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}
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/* add event to the queue */
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void
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mswin_input_push(PMSNHEvent event)
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{
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int new_write_pos;
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if (!nhi_init_input)
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mswin_nh_input_init();
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new_write_pos = (nhi_write_pos + 1) % NH_INPUT_BUFFER_SIZE;
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if (new_write_pos != nhi_read_pos) {
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memcpy(nhi_input_buffer + nhi_write_pos, event, sizeof(*event));
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nhi_write_pos = new_write_pos;
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}
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}
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/* get event from the queue and delete it */
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PMSNHEvent
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mswin_input_pop()
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{
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PMSNHEvent retval;
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#ifdef SAFERHANGUP
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/* always return ESC when hangup was requested */
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if (program_state.done_hup) {
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static MSNHEvent hangup_event;
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hangup_event.type = NHEVENT_CHAR;
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hangup_event.kbd.ch = '\033';
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return &hangup_event;
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}
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#endif
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if (!nhi_init_input)
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mswin_nh_input_init();
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if (nhi_read_pos != nhi_write_pos) {
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retval = &nhi_input_buffer[nhi_read_pos];
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nhi_read_pos = (nhi_read_pos + 1) % NH_INPUT_BUFFER_SIZE;
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} else {
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retval = NULL;
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}
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return retval;
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}
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/* get event from the queue but leave it there */
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PMSNHEvent
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mswin_input_peek()
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{
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PMSNHEvent retval;
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#ifdef SAFERHANGUP
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/* always return ESC when hangup was requested */
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if (program_state.done_hup) {
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static MSNHEvent hangup_event;
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hangup_event.type = NHEVENT_CHAR;
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hangup_event.kbd.ch = '\033';
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return &hangup_event;
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}
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#endif
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if (!nhi_init_input)
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mswin_nh_input_init();
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if (nhi_read_pos != nhi_write_pos) {
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retval = &nhi_input_buffer[nhi_read_pos];
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} else {
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retval = NULL;
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}
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return retval;
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}
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