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/*
* Copyright © 2023 Michael Smith <mikesmiffy128@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "con_.h"
#include "dbg.h"
#include "errmsg.h"
#include "feature.h"
#include "hook.h"
#include "intdefs.h"
#include "mem.h"
#include "x86.h"
#include "x86util.h"
FEATURE()
struct keyinfo {
char *binding;
uchar keyuptgt : 3;
uchar pressed : 1;
};
static struct keyinfo *keyinfo; // engine keybinds list (s_pKeyInfo[])
const char *bind_get(int keycode) { return keyinfo[keycode].binding; }
static bool find_keyinfo(con_cmdcb klbc_cb) {
#ifdef _WIN32
const uchar *insns = (const uchar *)klbc_cb;
for (const uchar *p = insns; p - insns < 32;) {
// key_listboundkeys loops through each index, moving into a register:
// mov <reg>, dword ptr [<reg> * 8 + s_pKeyInfo]
if (p[0] == X86_MOVRMW && (p[1] & 0xC7) == 4 /* SIB + imm32 */ &&
(p[2] & 0xC7) == 0xC5 /* [immediate + reg * 8] */) {
keyinfo = mem_loadptr(p + 3);
return true;
}
NEXT_INSN(p, "load from key binding list");
}
#else
#warning TODO(linux): check whether linux is equivalent!
#endif
return false;
}
INIT {
struct con_cmd *cmd_key_listboundkeys = con_findcmd("key_listboundkeys");
if (!cmd_key_listboundkeys) {
errmsg_errorx("couldn't find key_listboundkeys command");
return false;
}
con_cmdcb cb = con_getcmdcb(cmd_key_listboundkeys);
if (!find_keyinfo(cb)) {
errmsg_warnx("couldn't find key binding list");
return false;
}
return true;
}
// vi: sw=4 ts=4 noet tw=80 cc=80
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