lbbs/src/io.c

/***************************************************************************
                                                        io.c  -  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.                                   *
 *                                                                         *
 ***************************************************************************/

#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;

        unsigned char tmp[256];
        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;
        }

        // Stop on system exit
        if (SYS_exit)
                return KEY_NULL;

        if (pos >= len)
        {
                fd_set testfds;
                struct timeval timeout;

                pos = 0;
                len = 0;

                FD_ZERO(&testfds);
                FD_SET(0, &testfds);

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

                int result = SignalSafeSelect(FD_SETSIZE, &testfds, (fd_set *)NULL,
                                                                  (fd_set *)NULL, &timeout);

                if (result == 0)
                {
                        return KEY_TIMEOUT;
                }
                if (result < 0)
                {
                        log_error("select() error (%d) !\n", result);
                        return KEY_NULL;
                }
                if (result > 0)
                {
                        if (FD_ISSET(0, &testfds))
                        {
                                len = read(0, buf, 255);
                        }
                }

                // 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;
}

int ikbhit()
{
        int len;

        ioctl(0, FIONREAD, &len);

        return len;
}
1	sysadm	1.1	/***************************************************************************
2	sysadm	1.14	io.c - description
3			-------------------
4			begin : Mon Oct 18 2004
5			copyright : (C) 2004 by Leaflet
6			email : leaflet@leafok.com
7	sysadm	1.1	***************************************************************************/
8
9			/***************************************************************************
10			* *
11			* This program is free software; you can redistribute it and/or modify *
12			* it under the terms of the GNU General Public License as published by *
13			* the Free Software Foundation; either version 2 of the License, or *
14			* (at your option) any later version. *
15			* *
16			***************************************************************************/
17
18			#include "io.h"
19	sysadm	1.16	#include "log.h"
20	sysadm	1.1	#include "common.h"
21	sysadm	1.11	#include "tcplib.h"
22	sysadm	1.1	#include <stdio.h>
23			#include <stdarg.h>
24	sysadm	1.9	#include <time.h>
25			#include <fcntl.h>
26			#include <unistd.h>
27	sysadm	1.5	#include <sys/ioctl.h>
28	sysadm	1.1
29	sysadm	1.14	int outc(char c)
30	sysadm	1.1	{
31	sysadm	1.14	int retval;
32	sysadm	1.1
33	sysadm	1.14	retval = fprintf(stdout, "%c", c);
34	sysadm	1.1
35	sysadm	1.14	return retval;
36	sysadm	1.1	}
37
38	sysadm	1.14	int prints(const char *format, ...)
39	sysadm	1.1	{
40	sysadm	1.14	va_list args;
41			int retval;
42	sysadm	1.1
43	sysadm	1.14	va_start(args, format);
44			retval = vfprintf(stdout, format, args);
45			va_end(args);
46	sysadm	1.1
47	sysadm	1.14	return retval;
48	sysadm	1.1	}
49
50	sysadm	1.14	int iflush()
51	sysadm	1.1	{
52	sysadm	1.14	int retval;
53	sysadm	1.6
54	sysadm	1.14	retval = fflush(stdout);
55	sysadm	1.6
56	sysadm	1.14	return retval;
57	sysadm	1.1	}
58
59	sysadm	1.17	int igetch(int clear_buf)
60	sysadm	1.1	{
61	sysadm	1.18	// static input buffer
62	sysadm	1.19	static unsigned char buf[256];
63			static ssize_t len = 0;
64	sysadm	1.18	static int pos = 0;
65
66			unsigned char tmp[256];
67			int out = KEY_NULL;
68			int in_esc = 0;
69			int in_ascii = 0;
70			int in_control = 0;
71			int i = 0;
72	sysadm	1.1
73	sysadm	1.17	if (clear_buf)
74			{
75			pos = 0;
76			len = 0;
77
78			return 0;
79			}
80
81	sysadm	1.14	// Stop on system exit
82			if (SYS_exit)
83			return KEY_NULL;
84	sysadm	1.12
85	sysadm	1.14	if (pos >= len)
86			{
87	sysadm	1.18	fd_set testfds;
88			struct timeval timeout;
89
90	sysadm	1.14	pos = 0;
91			len = 0;
92	sysadm	1.2
93	sysadm	1.14	FD_ZERO(&testfds);
94			FD_SET(0, &testfds);
95	sysadm	1.9
96	sysadm	1.14	timeout.tv_sec = 1;
97			timeout.tv_usec = 0;
98	sysadm	1.9
99	sysadm	1.18	int result = SignalSafeSelect(FD_SETSIZE, &testfds, (fd_set *)NULL,
100	sysadm	1.14	(fd_set *)NULL, &timeout);
101	sysadm	1.9
102	sysadm	1.14	if (result == 0)
103			{
104			return KEY_TIMEOUT;
105			}
106			if (result < 0)
107			{
108			log_error("select() error (%d) !\n", result);
109			return KEY_NULL;
110			}
111			if (result > 0)
112			{
113			if (FD_ISSET(0, &testfds))
114			{
115			len = read(0, buf, 255);
116			}
117			}
118
119			// For debug
120			// for (j = 0; j < len; j++)
121			// log_std ("<--[%u]\n", (buf[j] + 256) % 256);
122	sysadm	1.11	}
123	sysadm	1.14
124			while (pos < len)
125	sysadm	1.11	{
126	sysadm	1.18	unsigned char c = buf[pos++];
127	sysadm	1.5
128	sysadm	1.14	if (c == '\0')
129			{
130			out = c;
131			break;
132			}
133	sysadm	1.1
134	sysadm	1.14	if (c == KEY_CONTROL)
135			{
136			if (in_control == 0)
137			{
138			in_control = 1;
139			i = 0;
140			continue;
141			}
142			}
143	sysadm	1.1
144	sysadm	1.14	if (in_control)
145			{
146			tmp[i++] = c;
147			if (i >= 2)
148			{
149			out = (int)tmp[0] * 256 + tmp[1];
150			in_control = 0;
151			break;
152			}
153			continue;
154			}
155	sysadm	1.6
156	sysadm	1.14	if (c == ESC_KEY)
157			{
158			if (in_esc == 0)
159			{
160			in_esc = 1;
161			in_ascii = 1;
162			i = 0;
163			continue;
164			}
165			else
166			{
167			out = ESC_KEY;
168			in_esc = 0;
169			break;
170			}
171			}
172	sysadm	1.3
173	sysadm	1.14	in_esc = 0;
174	sysadm	1.1
175	sysadm	1.14	if (in_ascii)
176			{
177			tmp[i++] = c;
178			if (c == 'm')
179			{
180			in_ascii = 0;
181			continue;
182			}
183			if (i == 2 && c >= 'A' && c <= 'D')
184			{
185			in_ascii = 0;
186			switch (c)
187			{
188			case 'A':
189			out = KEY_UP;
190			break;
191			case 'B':
192			out = KEY_DOWN;
193			break;
194			case 'C':
195			out = KEY_RIGHT;
196			break;
197			case 'D':
198			out = KEY_LEFT;
199			break;
200			}
201			break;
202			}
203			if (i == 3 && tmp[0] == 91 && tmp[2] == 126)
204			{
205			in_ascii = 0;
206			switch (tmp[1])
207			{
208			case 49:
209			out = KEY_HOME;
210			break;
211			case 51:
212			out = KEY_DEL;
213			break;
214			case 52:
215			out = KEY_END;
216			break;
217			case 53:
218			out = KEY_PGUP;
219			break;
220			case 54:
221			out = KEY_PGDN;
222			break;
223			}
224			break;
225			}
226			continue;
227			}
228	sysadm	1.1
229	sysadm	1.14	out = ((int)c + 256) % 256;
230			break;
231	sysadm	1.1	}
232
233	sysadm	1.14	// for debug
234			// log_std ("-->[%u]\n", out);
235	sysadm	1.1
236	sysadm	1.14	return out;
237	sysadm	1.1	}
238	sysadm	1.5
239	sysadm	1.14	int igetch_t(long int sec)
240	sysadm	1.9	{
241	sysadm	1.14	int ch;
242			time_t t_begin = time(0);
243	sysadm	1.10
244	sysadm	1.14	do
245			{
246	sysadm	1.17	ch = igetch(0);
247			} while ((ch == KEY_TIMEOUT \|\| ch == 0xa) && (time(0) - t_begin < sec));
248	sysadm	1.9
249	sysadm	1.14	return ch;
250	sysadm	1.9	}
251
252	sysadm	1.14	int ikbhit()
253	sysadm	1.5	{
254	sysadm	1.14	int len;
255	sysadm	1.6
256	sysadm	1.14	ioctl(0, FIONREAD, &len);
257	sysadm	1.6
258	sysadm	1.14	return len;
259	sysadm	1.5	}
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