--- lbbs/include/io.h	2004/10/23 08:22:25	1.2
+++ lbbs/include/io.h	2025/11/17 02:32:42	1.30
@@ -1,30 +1,119 @@
-/***************************************************************************
-                            io.h  -  description
-                             -------------------
-    begin                : Mon Oct 18 2004
-    copyright            : (C) 2004 by Leaflet
-    email                : leaflet@leafok.com
- ***************************************************************************/
-
-/***************************************************************************
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 2 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- ***************************************************************************/
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * io
+ *   - basic terminal-based user input / output features
+ *
+ * Copyright (C) 2004-2025  Leaflet <leaflet@leafok.com>
+ */
 
+#ifndef _IO_H_
+#define _IO_H_
+
+#include <iconv.h>
 #include <stdio.h>
 
-#define	ESC_KEY		'\033'
-#define	CR		'\r'
-#define LF		'\n'
-#define	BACKSPACE	'\b'
-#define	BELL		'\b'
-#define KEY_UP		0x101
-#define KEY_DOWN	0x102
-#define KEY_LEFT	0x103
-#define KEY_RIGHT	0x104
+enum io_key_t
+{
+    CR = '\r',
+    LF = '\n',
+    BACKSPACE = '\b',
+    BELL = '\b',
+    KEY_TAB = 9,
+    KEY_ESC = 27,
+    KEY_SPACE = '\040',
+
+    // Expand key
+    KEY_NULL = 0xffff,
+    KEY_TIMEOUT = 0xfffe,
+    KEY_CONTROL = 0xff,
+    KEY_UP = 0x0101,
+    KEY_DOWN = 0x0102,
+    KEY_RIGHT = 0x0103,
+    KEY_LEFT = 0x0104,
+    KEY_CSI = 0x011b, // ESC ESC
+    KEY_HOME = 0x0201,
+    KEY_INS = 0x0202,
+    KEY_DEL = 0x0203,
+    KEY_END = 0x0204,
+    KEY_PGUP = 0x0205,
+    KEY_PGDN = 0x0206,
+
+    KEY_F1 = 0x0207,
+    KEY_F2 = 0x0208,
+    KEY_F3 = 0x0209,
+    KEY_F4 = 0x020a,
+    KEY_F5 = 0x020b,
+    KEY_F6 = 0x020c,
+    KEY_F7 = 0x020d,
+    KEY_F8 = 0x020e,
+    KEY_F9 = 0x020f,
+    KEY_F10 = 0x0210,
+    KEY_F11 = 0x0211,
+    KEY_F12 = 0x0212,
+
+    KEY_SHIFT_F1 = 0x0213,
+    KEY_SHIFT_F2 = 0x0214,
+    KEY_SHIFT_F3 = 0x0215,
+    KEY_SHIFT_F4 = 0x0216,
+    KEY_SHIFT_F5 = 0x0217,
+    KEY_SHIFT_F6 = 0x0218,
+    KEY_SHIFT_F7 = 0x0219,
+    KEY_SHIFT_F8 = 0x021a,
+    KEY_SHIFT_F9 = 0x021b,
+    KEY_SHIFT_F10 = 0x021c,
+    KEY_SHIFT_F11 = 0x021d,
+    KEY_SHIFT_F12 = 0x021e,
+
+    KEY_CTRL_F1 = 0x021f,
+    KEY_CTRL_F2 = 0x0220,
+    KEY_CTRL_F3 = 0x0221,
+    KEY_CTRL_F4 = 0x0222,
+    KEY_CTRL_F5 = 0x0223,
+    KEY_CTRL_F6 = 0x0224,
+    KEY_CTRL_F7 = 0x0225,
+    KEY_CTRL_F8 = 0x0226,
+    KEY_CTRL_F9 = 0x0227,
+    KEY_CTRL_F10 = 0x0228,
+    KEY_CTRL_F11 = 0x0229,
+    KEY_CTRL_F12 = 0x022a,
+
+    KEY_CTRL_UP = 0x0230,
+    KEY_CTRL_DOWN = 0x0231,
+    KEY_CTRL_RIGHT = 0x0232,
+    KEY_CTRL_LEFT = 0x0233,
+    KEY_CTRL_HOME = 0x0234,
+    KEY_CTRL_END = 0x0235,
+};
+
+#define Ctrl(C) ((C) - 'A' + 1)
+
+enum io_echo_t
+{
+    NOECHO = 0,
+    DOECHO = 1,
+};
+
+enum io_iconv_t
+{
+    CHARSET_MAX_LEN = 20,
+};
+
+extern const char BBS_default_charset[CHARSET_MAX_LEN + 1];
+extern char stdio_charset[CHARSET_MAX_LEN + 1];
+
+extern int io_init(void);
+extern void io_cleanup(void);
+
+extern int prints(const char *format, ...);
+extern int outc(char c);
+extern int iflush(void);
+
+extern int igetch(int timeout);
+extern int igetch_t(int sec);
+extern void igetch_reset(void);
+
+extern int io_buf_conv(iconv_t cd, char *p_buf, int *p_buf_len, int *p_buf_offset, char *p_conv, size_t conv_size, int *p_conv_len);
+extern int io_conv_init(const char *charset);
+extern int io_conv_cleanup(void);
 
-extern int screen_lines;
+#endif //_IO_H_