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#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <fcntl.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
struct {
char key;
char *chars;
} map[] = {
{ '1', "_ -1?!,.:;\"'<=>()_" },
{ '2', "Cabc2ABC" },
{ '3', "Fdef3DEF" },
{ '4', "Ighi4GHI" },
{ '5', "Ljkl5JKL" },
{ '6', "Omno6MNO" },
{ '7', "Spqrs7PQRS" },
{ '8', "Vtuv8TUV" },
{ '9', "Zwxyz9WXYZ" },
{ '0', "*+&0@/#*" },
};
char next_char(char key, char current)
{
int i;
char *next;
for(i = 0; i < sizeof(map) / sizeof(map[0]); i++) {
if(key == map[i].key) {
next = strchr(map[i].chars, current);
if(next && next[1])
return next[1];
return map[i].chars[1];
}
}
return key;
}
char prev_char(char key, char current)
{
int i;
char *next;
for(i = 0; i < sizeof(map) / sizeof(map[0]); i++) {
if(key == map[i].key) {
next = strchr(map[i].chars+1, current);
if(next && next[-1])
return next[-1];
return map[i].chars[1];
}
}
return key;
}
int readtty_main(int argc, char *argv[])
{
int c;
//int flags;
char buf[1];
int res;
struct termios ttyarg;
struct termios savedttyarg;
int nonblock = 0;
int timeout = 0;
int flush = 0;
int phone = 0;
char *accept = NULL;
char *rejectstring = NULL;
char last_char_in = 0;
char current_char = 0;
char *exit_string = NULL;
int exit_match = 0;
do {
c = getopt(argc, argv, "nt:fa:r:pe:");
if (c == EOF)
break;
switch (c) {
case 't':
timeout = atoi(optarg);
break;
case 'n':
nonblock = 1;
break;
case 'f':
flush = 1;
break;
case 'a':
accept = optarg;
break;
case 'r':
rejectstring = optarg;
break;
case 'p':
phone = 1;
break;
case 'e':
exit_string = optarg;
break;
case '?':
fprintf(stderr, "%s: invalid option -%c\n",
argv[0], optopt);
exit(1);
}
} while (1);
if(flush)
tcflush(STDIN_FILENO, TCIFLUSH);
ioctl(STDIN_FILENO, TCGETS , &savedttyarg) ; /* set changed tty arguments */
ttyarg = savedttyarg;
ttyarg.c_cc[VMIN] = (timeout > 0 || nonblock) ? 0 : 1; /* minimum of 0 chars */
ttyarg.c_cc[VTIME] = timeout; /* wait max 15/10 sec */
ttyarg.c_iflag = BRKINT | ICRNL;
ttyarg.c_lflag &= ~(ECHO | ICANON);
ioctl(STDIN_FILENO, TCSETS , &ttyarg);
while (1) {
res = read(STDIN_FILENO, buf, 1);
if(res <= 0) {
if(phone) {
if(current_char) {
write(STDERR_FILENO, ¤t_char, 1);
write(STDOUT_FILENO, ¤t_char, 1);
if(exit_string && current_char == exit_string[exit_match]) {
exit_match++;
if(exit_string[exit_match] == '\0')
break;
}
else
exit_match = 0;
current_char = 0;
}
continue;
}
break;
}
if(accept && strchr(accept, buf[0]) == NULL) {
if(rejectstring) {
write(STDOUT_FILENO, rejectstring, strlen(rejectstring));
break;
}
if(flush)
tcflush(STDIN_FILENO, TCIFLUSH);
continue;
}
if(phone) {
//if(!isprint(buf[0])) {
// fprintf(stderr, "got unprintable character 0x%x\n", buf[0]);
//}
if(buf[0] == '\0') {
if(current_char) {
current_char = prev_char(last_char_in, current_char);
write(STDERR_FILENO, ¤t_char, 1);
write(STDERR_FILENO, "\b", 1);
}
continue;
}
if(current_char && buf[0] != last_char_in) {
write(STDERR_FILENO, ¤t_char, 1);
write(STDOUT_FILENO, ¤t_char, 1);
if(exit_string && current_char == exit_string[exit_match]) {
exit_match++;
if(exit_string[exit_match] == '\0')
break;
}
else
exit_match = 0;
current_char = 0;
}
last_char_in = buf[0];
current_char = next_char(last_char_in, current_char);
write(STDERR_FILENO, ¤t_char, 1);
write(STDERR_FILENO, "\b", 1);
continue;
}
write(STDOUT_FILENO, buf, 1);
break;
}
ioctl(STDIN_FILENO, TCSETS , &savedttyarg) ; /* set changed tty arguments */
return 0;
}
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