lbbs/src/io.c

/***************************************************************************
                                                        io.c  -  description
                                                         -------------------
        Copyright            : (C) 2004-2025 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 3 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/

#include "io.h"
#include "log.h"
#include "common.h"
#include "tcplib.h"
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>

int outc(char c)
{
        int retval;

        retval = fprintf(stdout, "%c", c);

        return retval;
}

int prints(const char *format, ...)
{
        va_list args;
        int retval;

        va_start(args, format);
        retval = vfprintf(stdout, format, args);
        va_end(args);

        return retval;
}

int iflush()
{
        int retval;

        retval = fflush(stdout);

        return retval;
}

int igetch(int clear_buf)
{
        // static input buffer
        static unsigned char buf[256];
        static ssize_t len = 0;
        static int pos = 0;

        fd_set testfds;
        struct timeval timeout;

        unsigned char tmp[256];
        int ret;
        int out = KEY_NULL;
        int in_esc = 0;
        int in_ascii = 0;
        int in_control = 0;
        int i = 0;

        if (clear_buf)
        {
                pos = 0;
                len = 0;

                return 0;
        }

        while (!SYS_server_exit && pos >= len)
        {
                FD_ZERO(&testfds);
                FD_SET(STDIN_FILENO, &testfds);

                timeout.tv_sec = 1;
                timeout.tv_usec = 0;

                ret = select(FD_SETSIZE, &testfds, NULL, NULL, &timeout);

                if (ret < 0)
                {
                        if (errno != EINTR)
                        {
                                log_error("Select error in igetch: !\n", errno);
                                return KEY_NULL;
                        }
                        continue;
                }
                else if (ret == 0)
                {
                        return KEY_TIMEOUT;
                }

                if (FD_ISSET(STDIN_FILENO, &testfds))
                {
                        len = read(STDIN_FILENO, buf, 255);
                        pos = 0;
                        break;
                }

                // For debug
                // for (j = 0; j < len; j++)
                //   log_std ("<--[%u]\n", (buf[j] + 256) % 256);
        }

        while (pos < len)
        {
                unsigned char c = buf[pos++];

                if (c == '\0')
                {
                        out = c;
                        break;
                }

                if (c == KEY_CONTROL)
                {
                        if (in_control == 0)
                        {
                                in_control = 1;
                                i = 0;
                                continue;
                        }
                }

                if (in_control)
                {
                        tmp[i++] = c;
                        if (i >= 2)
                        {
                                out = (int)tmp[0] * 256 + tmp[1];
                                in_control = 0;
                                break;
                        }
                        continue;
                }

                if (c == ESC_KEY)
                {
                        if (in_esc == 0)
                        {
                                in_esc = 1;
                                in_ascii = 1;
                                i = 0;
                                continue;
                        }
                        else
                        {
                                out = ESC_KEY;
                                in_esc = 0;
                                break;
                        }
                }

                in_esc = 0;

                if (in_ascii)
                {
                        tmp[i++] = c;
                        if (c == 'm')
                        {
                                in_ascii = 0;
                                continue;
                        }
                        if (i == 2 && c >= 'A' && c <= 'D')
                        {
                                in_ascii = 0;
                                switch (c)
                                {
                                case 'A':
                                        out = KEY_UP;
                                        break;
                                case 'B':
                                        out = KEY_DOWN;
                                        break;
                                case 'C':
                                        out = KEY_RIGHT;
                                        break;
                                case 'D':
                                        out = KEY_LEFT;
                                        break;
                                }
                                break;
                        }
                        if (i == 3 && tmp[0] == 91 && tmp[2] == 126)
                        {
                                in_ascii = 0;
                                switch (tmp[1])
                                {
                                case 49:
                                        out = KEY_HOME;
                                        break;
                                case 51:
                                        out = KEY_DEL;
                                        break;
                                case 52:
                                        out = KEY_END;
                                        break;
                                case 53:
                                        out = KEY_PGUP;
                                        break;
                                case 54:
                                        out = KEY_PGDN;
                                        break;
                                }
                                break;
                        }
                        continue;
                }

                out = ((int)c + 256) % 256;
                break;
        }

        // for debug
        // log_std ("-->[%u]\n", out);

        return out;
}

int igetch_t(long int sec)
{
        int ch;
        time_t t_begin = time(0);

        do
        {
                ch = igetch(0);
        } while ((ch == KEY_TIMEOUT || ch == 0xa) && (time(0) - t_begin < sec));

        return ch;
}
1	sysadm	1.1	/***************************************************************************
2	sysadm	1.14	io.c - description
3			-------------------
4	sysadm	1.20	Copyright : (C) 2004-2025 by Leaflet
5			Email : leaflet@leafok.com
6	sysadm	1.1	***************************************************************************/
7
8			/***************************************************************************
9			* *
10			* This program is free software; you can redistribute it and/or modify *
11			* it under the terms of the GNU General Public License as published by *
12	sysadm	1.20	* the Free Software Foundation; either version 3 of the License, or *
13	sysadm	1.1	* (at your option) any later version. *
14			* *
15			***************************************************************************/
16
17			#include "io.h"
18	sysadm	1.16	#include "log.h"
19	sysadm	1.1	#include "common.h"
20	sysadm	1.11	#include "tcplib.h"
21	sysadm	1.1	#include <stdio.h>
22			#include <stdarg.h>
23	sysadm	1.9	#include <time.h>
24			#include <fcntl.h>
25			#include <unistd.h>
26	sysadm	1.5	#include <sys/ioctl.h>
27	sysadm	1.1
28	sysadm	1.14	int outc(char c)
29	sysadm	1.1	{
30	sysadm	1.14	int retval;
31	sysadm	1.1
32	sysadm	1.14	retval = fprintf(stdout, "%c", c);
33	sysadm	1.1
34	sysadm	1.14	return retval;
35	sysadm	1.1	}
36
37	sysadm	1.14	int prints(const char *format, ...)
38	sysadm	1.1	{
39	sysadm	1.14	va_list args;
40			int retval;
41	sysadm	1.1
42	sysadm	1.14	va_start(args, format);
43			retval = vfprintf(stdout, format, args);
44			va_end(args);
45	sysadm	1.1
46	sysadm	1.14	return retval;
47	sysadm	1.1	}
48
49	sysadm	1.14	int iflush()
50	sysadm	1.1	{
51	sysadm	1.14	int retval;
52	sysadm	1.6
53	sysadm	1.14	retval = fflush(stdout);
54	sysadm	1.6
55	sysadm	1.14	return retval;
56	sysadm	1.1	}
57
58	sysadm	1.17	int igetch(int clear_buf)
59	sysadm	1.1	{
60	sysadm	1.18	// static input buffer
61	sysadm	1.19	static unsigned char buf[256];
62			static ssize_t len = 0;
63	sysadm	1.18	static int pos = 0;
64
65	sysadm	1.21	fd_set testfds;
66			struct timeval timeout;
67
68	sysadm	1.18	unsigned char tmp[256];
69	sysadm	1.21	int ret;
70	sysadm	1.18	int out = KEY_NULL;
71			int in_esc = 0;
72			int in_ascii = 0;
73			int in_control = 0;
74			int i = 0;
75	sysadm	1.1
76	sysadm	1.17	if (clear_buf)
77			{
78			pos = 0;
79			len = 0;
80
81			return 0;
82			}
83
84	sysadm	1.21	while (!SYS_server_exit && pos >= len)
85	sysadm	1.14	{
86			FD_ZERO(&testfds);
87	sysadm	1.21	FD_SET(STDIN_FILENO, &testfds);
88	sysadm	1.9
89	sysadm	1.14	timeout.tv_sec = 1;
90			timeout.tv_usec = 0;
91	sysadm	1.9
92	sysadm	1.21	ret = select(FD_SETSIZE, &testfds, NULL, NULL, &timeout);
93	sysadm	1.9
94	sysadm	1.21	if (ret < 0)
95	sysadm	1.14	{
96	sysadm	1.21	if (errno != EINTR)
97			{
98			log_error("Select error in igetch: !\n", errno);
99			return KEY_NULL;
100			}
101			continue;
102	sysadm	1.14	}
103	sysadm	1.21	else if (ret == 0)
104	sysadm	1.14	{
105	sysadm	1.21	return KEY_TIMEOUT;
106	sysadm	1.14	}
107	sysadm	1.21
108			if (FD_ISSET(STDIN_FILENO, &testfds))
109	sysadm	1.14	{
110	sysadm	1.21	len = read(STDIN_FILENO, buf, 255);
111			pos = 0;
112			break;
113	sysadm	1.14	}
114
115			// For debug
116			// for (j = 0; j < len; j++)
117			// log_std ("<--[%u]\n", (buf[j] + 256) % 256);
118	sysadm	1.11	}
119	sysadm	1.14
120			while (pos < len)
121	sysadm	1.11	{
122	sysadm	1.18	unsigned char c = buf[pos++];
123	sysadm	1.5
124	sysadm	1.14	if (c == '\0')
125			{
126			out = c;
127			break;
128			}
129	sysadm	1.1
130	sysadm	1.14	if (c == KEY_CONTROL)
131			{
132			if (in_control == 0)
133			{
134			in_control = 1;
135			i = 0;
136			continue;
137			}
138			}
139	sysadm	1.1
140	sysadm	1.14	if (in_control)
141			{
142			tmp[i++] = c;
143			if (i >= 2)
144			{
145			out = (int)tmp[0] * 256 + tmp[1];
146			in_control = 0;
147			break;
148			}
149			continue;
150			}
151	sysadm	1.6
152	sysadm	1.14	if (c == ESC_KEY)
153			{
154			if (in_esc == 0)
155			{
156			in_esc = 1;
157			in_ascii = 1;
158			i = 0;
159			continue;
160			}
161			else
162			{
163			out = ESC_KEY;
164			in_esc = 0;
165			break;
166			}
167			}
168	sysadm	1.3
169	sysadm	1.14	in_esc = 0;
170	sysadm	1.1
171	sysadm	1.14	if (in_ascii)
172			{
173			tmp[i++] = c;
174			if (c == 'm')
175			{
176			in_ascii = 0;
177			continue;
178			}
179			if (i == 2 && c >= 'A' && c <= 'D')
180			{
181			in_ascii = 0;
182			switch (c)
183			{
184			case 'A':
185			out = KEY_UP;
186			break;
187			case 'B':
188			out = KEY_DOWN;
189			break;
190			case 'C':
191			out = KEY_RIGHT;
192			break;
193			case 'D':
194			out = KEY_LEFT;
195			break;
196			}
197			break;
198			}
199			if (i == 3 && tmp[0] == 91 && tmp[2] == 126)
200			{
201			in_ascii = 0;
202			switch (tmp[1])
203			{
204			case 49:
205			out = KEY_HOME;
206			break;
207			case 51:
208			out = KEY_DEL;
209			break;
210			case 52:
211			out = KEY_END;
212			break;
213			case 53:
214			out = KEY_PGUP;
215			break;
216			case 54:
217			out = KEY_PGDN;
218			break;
219			}
220			break;
221			}
222			continue;
223			}
224	sysadm	1.1
225	sysadm	1.14	out = ((int)c + 256) % 256;
226			break;
227	sysadm	1.1	}
228
229	sysadm	1.14	// for debug
230			// log_std ("-->[%u]\n", out);
231	sysadm	1.1
232	sysadm	1.14	return out;
233	sysadm	1.1	}
234	sysadm	1.5
235	sysadm	1.14	int igetch_t(long int sec)
236	sysadm	1.9	{
237	sysadm	1.14	int ch;
238			time_t t_begin = time(0);
239	sysadm	1.10
240	sysadm	1.14	do
241			{
242	sysadm	1.17	ch = igetch(0);
243			} while ((ch == KEY_TIMEOUT \|\| ch == 0xa) && (time(0) - t_begin < sec));
244	sysadm	1.9
245	sysadm	1.14	return ch;
246	sysadm	1.9	}
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