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/* $Id: mapid.c,v 1.2 2001/12/24 07:56:33 j_ali Exp $ */
/* Copyright (c) Slash'EM Development Team 2001-2002 */
/* NetHack may be freely redistributed. See license for details. */
#include "hack.h"
#include "nhxdr.h"
#include "winproxy.h"
/*
* [ALI] It would be far too much work to pass generic identifiers to
* plug-in window ports (and also pointless). Instead we substitute
* integers. We keep a record of the mapping so that we can reverse
* this in the reply.
* Note: zero is a special value and must be preserved. Window ports
* should treat all other values as opaque.
*/
struct mapid__window {
winid id;
int no_identifiers;
anything *identifiers;
};
static int mapid__no_windows;
static struct mapid__window *mapid__windows;
/*
* Get the index into mapid__windows for window id, adding an
* entry if necessary.
*/
static int mapid__add_winid(id)
winid id;
{
int i;
if (id == WIN_ERR)
panic("mapid__add_winid: Bad window ID");
for(i = 0; i < mapid__no_windows; i++)
if (mapid__windows[i].id == id)
return i;
for(i = 0; i < mapid__no_windows; i++)
if (mapid__windows[i].id == WIN_ERR)
break;
if (i == mapid__no_windows) {
if (mapid__no_windows++)
mapid__windows = (struct mapid__window *)realloc(mapid__windows,
mapid__no_windows * sizeof(*mapid__windows));
else
mapid__windows = (struct mapid__window *)malloc(sizeof(*mapid__windows));
if (!mapid__windows)
panic("proxy: can't get %d bytes",
mapid__no_windows * sizeof(*mapid__windows));
}
mapid__windows[i].id = id;
mapid__windows[i].no_identifiers = 0;
mapid__windows[i].identifiers = (anything *)0;
return i;
}
/*
* Scrap any entry in mapid__windows for window id.
*/
void mapid_del_winid(id)
winid id;
{
int i;
if (id == WIN_ERR)
panic("mapid_del_winid: Bad window ID");
for(i = 0; i < mapid__no_windows; i++)
if (mapid__windows[i].id == id) {
if (mapid__windows[i].no_identifiers)
free(mapid__windows[i].identifiers);
mapid__windows[i].id = WIN_ERR;
break;
}
}
/*
* Map identifier into an integer which can be used to unmap back to
* the same identifier later. Zero is treated specially and will always
* map to zero (and non-zero identifiers will never map to zero).
*/
int mapid_map_identifier(id, identifier)
winid id;
const anything *identifier;
{
int i, j;
if (identifier->a_void == 0)
return 0;
i = mapid__add_winid(id);
if (j = mapid__windows[i].no_identifiers++)
mapid__windows[i].identifiers =
(anything *)realloc(mapid__windows[i].identifiers,
mapid__windows[i].no_identifiers * sizeof(*mapid__windows->identifiers));
else
mapid__windows[i].identifiers =
(anything *)malloc(sizeof(*mapid__windows->identifiers));
if (!mapid__windows[i].identifiers)
panic("proxy: can't get %d bytes",
mapid__windows[i].no_identifiers * sizeof(*mapid__windows->identifiers));
mapid__windows[i].identifiers[j] = *identifier;
return j + 1;
}
/*
* Retrieve the identifier from the mapping.
*/
void mapid_unmap_identifier(id, mapping, identifier)
winid id;
int mapping;
anything *identifier;
{
int i;
if (mapping == 0) {
identifier->a_void = 0;
return;
}
if (id == WIN_ERR)
panic("mapid_unmap_identifier: Bad window ID");
for(i = 0; i < mapid__no_windows; i++)
if (mapid__windows[i].id == id)
break;
if (i == mapid__no_windows)
{
impossible("Ext: Trying to unmap on an unopened window?");
identifier->a_void = 0;
return;
}
if (mapping < 1 || mapping > mapid__windows[i].no_identifiers)
{
impossible("Bad identifier returned from plug-in.");
identifier->a_void = 0;
return;
}
*identifier = mapid__windows[i].identifiers[mapping - 1];
}
/*
* Discard all previously mapped identifiers for window.
*/
void mapid_del_identifiers(id)
winid id;
{
int i;
if (id == WIN_ERR)
panic("mapid_del_indentifiers: Bad window ID");
for(i = 0; i < mapid__no_windows; i++)
if (mapid__windows[i].id == id) {
if (mapid__windows[i].no_identifiers)
free(mapid__windows[i].identifiers);
mapid__windows[i].identifiers = (anything *)0;
mapid__windows[i].no_identifiers = 0;
break;
}
}
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